CN116163058A - Preparation method of friction nano power generation fabric in different modes and application of friction nano power generation fabric in friction nano power generation field - Google Patents

Abstract

The invention belongs to the technical field of friction nano generators, and particularly relates to a preparation method of friction nano power generation fabrics in different modes and application of the friction nano power generation fabrics in the field of friction nano power generation. The friction nano power generation fabric provided by the invention comprises three working modes: the invention effectively conceals the conductive wire in the composite yarn, effectively avoids abrasion or fracture of the electrode of the conductive wire, ensures that the friction nano power generation fabric keeps stable output signals, and greatly improves the electrical output performance such as open circuit voltage, short circuit current value and the like of the friction fabric; meanwhile, the contact separation-sliding type friction nano power generation fabric can effectively improve the electrical output performance of the fabric through the synergistic effect of the two working modes, provides effective reference for the novel wearable friction nano engine, and is beneficial to pushing the practical application of the flexible friction nano power generator.

Description

Preparation methods of triboelectric nano-electricity fabrics in different modes and their application in the field of triboelectric nano-electricity generation domain application

technical field

The invention belongs to the technical field of friction nanometer generators, and in particular relates to a preparation method of friction nanometer power generation fabrics in different modes and an application in the field of friction nanometer power generation.

Background technique

In recent years, scientists have continuously explored and developed various clean and renewable energy sources, and the consumption energy structure has expanded from coal, oil, and natural gas to a diversified energy structure. Among them, the collection, conversion, storage and utilization of micro-nano energy is a new generation of clean energy technology based on micro-nano energy technology. The exploration and development of micro-nano energy technology will promote the revolutionary innovation of efficient utilization of green and renewable energy. The energy crisis offers important solutions. Due to its many advantages such as high energy density, high conversion efficiency, light weight, wide selection of materials, and scalability, the triboelecctric Nanogenerator (TENG) can convert various forms of mechanical energy in the environment into electrical energy, such as human body motion. Energy, the energy of mechanical vibration, the energy of rotational motion, the energy of wind in nature, the energy of falling raindrops and the wave energy of water waves, etc. Therefore, triboelectric nanogenerators have become one of the research hotspots in the field of renewable energy.

In 2012, the research team of Professor Wang Zhonglin reported the flexible triboelectric nanogenerator for the first time. This device uses the principle of triboelectrification and electrostatic induction phase coupling to generate triboelectric charges through the mutual contact of two flexible polymer materials with different electronegativity. During the contact and separation process of two materials, an AC signal is generated in the external circuit to realize the conversion of mechanical energy into electrical energy. Since then, reports on triboelectric nanogenerators have emerged one after another, and triboelectric nanogenerators have gradually become a research focus and hotspot of interdisciplinary and multi-technical integration, opening up a new category of energy conversion and application. Scientists obtain energy from various mechanical energies such as biological motion, mechanical vibration, waves, and airflow through frictional nanogenerators, which can provide self-powered and self-driven devices for portable electronic terminals, environmental detection, medical research, and energy conversion. The future shows broad application prospects.

According to the relative motion direction of the two triboelectric materials, the basic working modes of triboelectric nanogenerators can be divided into four types (as shown in Figure 24): vertical contact-separation mode, horizontal sliding friction mode, single electrode mode, independent friction mode; different types of triboelectric nanogenerators can be designed to harvest various mechanical energy in the environment so as to realize the application under different working conditions. For example, the vertical contact separation mode is suitable for collecting mechanical energy in the form of beating, vibration and impact; the horizontal sliding mode is suitable for collecting mechanical energy in the form of sliding, rotation and fluctuation; The collection and application of mechanical energy in environments such as wheels; the independent friction mode is suitable for collecting mechanical energy generated by rolling objects on the ground and liquid flow on the interface. At present, extensive research has been carried out on ocean wave energy harvesting, electrochemical application systems, and energy harvesting and storage integrated systems. In order to continue to further develop the triboelectric nanogenerator, it is necessary to study its working principle in depth, further expand its application range, and make it commercialized, thereby changing the way people obtain energy and truly realizing that technology can change life.

At present, although triboelectric nanogenerators have made significant development and progress in recent years, they are still in a state of slow advancement in many aspects such as device design, function expansion, and practical applications, and further improvements need to be achieved. For example, the reported flexible triboelectric nanogenerators Generators generally use external electrodes, which are prone to wear when exposed to the air for a long time, which affects the stability of electrical signal transmission and even reduces the service life of the device.

Contents of the invention

The purpose of the present invention is to provide a preparation method of different modes of frictional nano-power generation fabric and its application in the field of frictional nano-power generation. The frictional nano-power generation fabric provided by the invention can effectively avoid contact damage between conductive wires and the outside world, and at the same time ensure that the obtained frictional nano-power generation The electrical signal transmission of the device is stable, and the triboelectric nanometer power generation fabric provided by the invention can realize the coordinated operation of multiple working modes, thereby increasing the open-circuit voltage and short-circuit current value of the friction nanometer power generation fabric.

In order to achieve the above object, the present invention provides the following technical solutions:

The present invention provides a frictional nanometer power generation fabric, comprising a first fabric and a second fabric; the first fabric and the second fabric are connected by a plurality of positioning stitching points; the frictional nanometer power generation fabric is divided by the positioning stitching points It is a plurality of separation friction units, and in a natural state, the first fabric and the second fabric in each separation friction unit do not contact each other;

The first fabric comprises conductive wires@nylon weft knitted fabric or nylon weft knitted fabric;

When the first fabric is conductive wire @nylon weft knitted fabric, the second fabric is conductive wire @polyester weft knitted fabric or polyester weft knitted fabric;

When the first fabric is nylon weft-knitted fabric, the second fabric is conductive wire@polyester weft-knitted fabric;

The conductive wire @ nylon weft-knitted fabric is obtained by weft knitting of the conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire;

The conductive wire @polyester weft-knitted fabric is obtained by weft knitting the conductive wire@polyester composite yarn, and the conductive wire@polyester composite yarn includes a conductive wire and a polyester braided fiber layer coated on the surface of the conductive wire;

The nylon weft-knitted fabric is obtained by weft-knitting nylon yarn;

The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

The present invention provides a triboelectric nanometer fabric, comprising a third fabric and a fourth fabric arranged in layers;

The third fabric is conductive wire @nylon weft-knitted fabric and polyester weft-knitted fabric connected at intervals; the fourth fabric is polyester weft-knitted fabric;

The conductive wire @ nylon weft-knitted fabric is obtained by weft knitting of the conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire;

The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

Preferably, the linear distance between two adjacent positioning suture points is 0.5-5 cm.

Preferably, in two adjacent separation friction units, the total length of the first fabric is equal to the total length of the second fabric, and both are greater than the linear distance between two adjacent positioning stitching points 2 times.

Preferably, the conductive wires are independently carbon-based conductive fibers, stainless steel wires, gold wires, copper wires, silver wires or silver-plated copper wires.

Preferably, the preparation method of the conductive wire@nylon composite yarn or the conductive wire@polyester composite yarn comprises the following steps:

The conductive wire is used as the core yarn, the nylon yarn or the polyester yarn is used as the weaving yarn, and the fiber layer is woven on the surface of the conductive wire by a two-dimensional weaving method to obtain the conductive wire@nylon composite yarn or the conductive wire@polyester Composite yarn; the diameter of the conductive wire is 0.1mm; the diameter of the nylon yarn is 0.1-0.14mm, and the specification of the nylon yarn is 150D/2 strands or 100D/2 strands; the polyester yarn The diameter of the polyester yarn is 0.1-0.13mm, and the specification of the polyester yarn is 70D/2 strands or 120D/2 strands;

The parameters of the two-dimensional weaving include: the number of spindles of nylon yarn or polyester yarn is independently 6-18; the traction tension is independently 0.15-0.27N; and the knitting speed is 9.5-15mm/min.

Preferably, said polyester yarn or nylon yarn is made of polyester fiber or nylon fiber, and the preparation method of said polyester fiber or nylon fiber comprises the following steps:

The polyester masterbatch or nylon masterbatch is melt-spun to obtain the polyester yarn or nylon yarn; the spinning temperature of the melt-spinning is independently 150-200°C; the extrusion rate of the melt-spinning is independently 600-1100 mm·min ^-1 ; the fiber drawing temperature of the melt spinning is independently 100-160° C.; the drawing ratio of the melt spinning is independently 1:1-1:3.5.

The present invention provides a preparation method of the frictional nanometer power generation fabric described in the above technical solution, comprising the following steps:

The first fabric and the second fabric are stitched according to the stitching point to obtain the triboelectric nanometer fabric.

Preferably, the positioning suture uses cotton thread as the suture, and the seam structure of the positioning suture is flat seam, partial pressure seam, crimping seam, overlapping seam or back and forth seam; the stitches of the positioning suture are single-sided covering Chain stitch or double-sided covered chain stitch, the single-sided covered chain stitch is three or four-thread single-sided covered chain stitch, and the double-sided covered chain stitch is four or five threads Covering chain stitches on both sides; the stitch density of the positioning suture is 7 needles/2cm to 10 needles/2cm; the needle type of the positioning suture is No. 9 to No. 16.

The present invention provides the application of the friction nano power generation fabric described in the above technical solution or the friction nano power generation fabric prepared by the preparation method described in the above technical solution in a friction nano power generation device.

The present invention provides a frictional nanometer power generation fabric, comprising a first fabric and a second fabric; the first fabric and the second fabric are connected by a plurality of positioning stitching points; the frictional nanometer power generation fabric is divided by the positioning stitching points It is a plurality of separation friction units, in a natural state, the first fabric and the second fabric in each separation friction unit are not in contact with each other; the first fabric includes conductive wire @nylon weft knitted fabric or nylon weft knitted fabric; When the first fabric is conductive wire @nylon weft knitted fabric, the second fabric is conductive wire @polyester weft knitted fabric or polyester weft knitted fabric; when the first fabric is nylon weft knitted fabric, The second fabric is conductive wire @polyester weft-knitted fabric; the conductive wire @nylon weft-knitted fabric is obtained by weft-knitting conductive wire @nylon composite yarn, and the conductive wire @nylon composite yarn includes conductive wire And the nylon braided fiber layer coated on the surface of the conductive wire; the conductive wire@polyester weft-knitted fabric is obtained by weft knitting of the conductive wire@polyester composite yarn, and the conductive wire@polyester composite yarn includes a conductive wire and a polyester woven fiber layer covering the surface of the conductive wire; the nylon weft-knitted fabric is obtained by weft-knitting nylon yarn; the polyester weft-knitted fabric is obtained by weft-knitting polyester yarn. The invention weaves the nylon or polyester fiber layer two-dimensionally on the surface of the conductive wire, effectively hides the conductive wire in the composite yarn, effectively prevents the electrode of the conductive wire from being worn or broken, so as to ensure that the frictional nano power generation fabric keeps the output signal stable, and at the same time improves It improves the wearing comfort, flexibility and durability of the device. On the other hand, the frictional nano-power generation fabric provided by the present invention connects the positive electrode material and the negative electrode material by positioning the stitching point, and by adjusting the structure of the positive and negative electrode fabrics, the frictional nano-power generation fabric with different working modes is successfully constructed, and the contact separation-contact sliding is realized. The synergistic mode or single-electrode mode greatly improves the electrical output performance of the friction fabric, such as the open circuit voltage and short circuit current value.

Further, the present invention provides a frictional nano power generation fabric, including a third fabric and a fourth fabric arranged in layers; the third fabric is conductive wire@nylon weft-knitted fabric and polyester weft-knitted fabric connected at intervals; the first The fourth fabric is polyester weft-knitted fabric; the conductive wire @nylon weft-knitted fabric is obtained by weft-knitting conductive wire @nylon composite yarn, and the conductive wire @nylon composite yarn includes a conductive wire and is coated on the The nylon weaving fiber layer on the surface of the conductive wire; the polyester weft-knitted fabric is obtained by weft-knitting polyester yarn. Through structural design, the invention realizes the frictional nanometer power generation fabric with independent frictional effect, and is suitable for the independent frictional nanometer power generation device.

To sum up, the triboelectric nano-power generation fabric provided by the present invention ensures the excellent electrical output characteristics of the tribo-nano power generation device, enables the tribo-nano power generation device to adapt to various working conditions, and realizes large-scale reliable application.

The present invention provides a preparation method of the frictional nanometer power generation fabric described in the above technical solution, comprising the following steps: positioning and sewing the first fabric and the second fabric according to the positioning stitching points to obtain the frictional nanometer power generation fabric. The invention adopts a positioning sewing method, and constructs a contact-separation-sliding type and an independent friction type friction nano power generation fabric through the advance electrode fabric structure design, the preparation method is simple, and it is suitable for industrial production.

Description of drawings

Fig. 1 is a flow chart for the preparation of the triboelectric nanometer fabric provided by the embodiment of the present invention;

Fig. 2 is the preparation flowchart of conductive wire @nylon composite yarn, conductive wire@polyester composite yarn and polyester yarn provided by the embodiment of the present invention;

Figure 3 is a side view of the copper@nylon composite yarn prepared in Example 1 of the present invention;

Figure 4 is a side view and a cross-sectional view of the copper@polyester composite yarn prepared in Example 1 of the present invention;

Fig. 5 is the side view of the polyester yarn prepared by Example 1 of the present invention;

Fig. 6 is a schematic diagram of the transition of conductive wire @nylon weft knitted fabric, conductive wire @polyester weft knitted fabric or polyester weft knitted fabric in relaxation state and tension state prepared by the embodiment of the present invention;

Fig. 7 is a schematic diagram of the structure and power generation principle of the contact separation-sliding friction nano power generation fabric prepared in the embodiment of the present invention;

Fig. 8 is a physical diagram of the contact-separation-sliding friction nano-power generation fabric prepared in Example 1 of the present invention;

Fig. 9 is a schematic diagram of the structure and power generation principle of the single-electrode friction nano power generation fabric prepared in the embodiment of the present invention;

Fig. 10 is a physical diagram of the single-electrode friction nano power generation fabric prepared in Example 1 of the present invention;

Figure 11 is a schematic diagram of the structure and power generation principle of the independent frictional friction nano-power generation fabric prepared in the embodiment of the present invention;

Fig. 12 is a physical diagram of the independent frictional frictional nanometer power generation fabric prepared in Example 1 of the present invention;

Figure 13 is the electrical output performance diagram of the contact-separation-sliding friction nano-power generation fabric prepared in Example 1 of the present invention, the left diagram is a voltage diagram, and the right diagram is a current diagram;

Fig. 14 is a diagram of the electrical output performance of the single-electrode triboelectric nanogenerator fabric prepared in Example 1 of the present invention, the left diagram is a voltage diagram, and the right diagram is a current diagram;

Figure 15 is the electrical output performance diagram of the independent frictional friction nano-power generation fabric prepared in Example 1 of the present invention, the left diagram is a voltage diagram, and the right diagram is a current diagram;

Figure 16 is a side view of the copper-plated silver@nylon composite yarn prepared in Example 2 of the present invention;

Figure 17 is a side view of the copper-plated silver@polyester composite yarn prepared in Example 2 of the present invention

Fig. 18 is a physical diagram of the contact-separation-sliding friction nano-power generation fabric prepared in Example 2 of the present invention;

Fig. 19 is a physical diagram of the single-electrode friction nano-power generation fabric prepared in Example 2 of the present invention;

Fig. 20 is a physical picture of the independent frictional frictional nanometer power generation fabric prepared in Example 2 of the present invention;

Fig. 21 is the electrical output performance diagram of the contact separation-sliding friction nano power generation fabric prepared in Example 2 of the present invention, the left diagram is a voltage diagram, and the right diagram is a current diagram;

Fig. 22 is the electrical output performance diagram of the single-electrode frictional nanometer power generation fabric prepared in Example 2 of the present invention, the left diagram is a voltage diagram, and the right diagram is a current diagram;

Figure 23 is the electrical output performance diagram of the independent frictional friction nano-power generation fabric prepared in Example 2 of the present invention, the left diagram is a voltage diagram, and the right diagram is a current diagram;

Fig. 24 is an explanatory diagram of four basic working modes of the triboelectric nanogenerator in the present invention.

Detailed ways

The present invention provides a frictional nanometer power generation fabric, comprising a first fabric and a second fabric; the first fabric and the second fabric are connected by a plurality of positioning stitching points; the frictional nanometer power generation fabric is divided by the positioning stitching points It is a plurality of separation friction units, and in a natural state, the first fabric and the second fabric in each separation friction unit do not contact each other;

The first fabric comprises conductive wires@nylon weft knitted fabric or nylon weft knitted fabric;

The first fabric is conductive wire @nylon weft knitted fabric, and the second fabric is conductive wire @polyester weft knitted fabric or polyester weft knitted fabric;

The first fabric is nylon weft-knitted fabric, and the second fabric is conductive wire @polyester weft-knitted fabric;

The conductive wire @ nylon weft-knitted fabric is obtained by weft knitting of the conductive wire @ nylon composite yarn, and the conductive wire @ nylon composite yarn includes a conductive wire and a nylon braided fiber layer coated on the surface of the conductive wire;

The conductive wire @polyester weft-knitted fabric is obtained by weft knitting the conductive wire@polyester composite yarn, and the conductive wire@polyester composite yarn includes a conductive wire and a polyester braided fiber layer coated on the surface of the conductive wire;

The nylon weft-knitted fabric is obtained by weft-knitting nylon yarn;

The polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

In the present invention, unless otherwise specified, all preparation raw materials/components are commercially available products well known to those skilled in the art.

The frictional nano power generation fabric provided by the present invention includes a first fabric and a second fabric; when the first fabric and the second fabric are connected through a plurality of positioning stitching points; when the first fabric is a conductive wire @nylon weft knitted fabric , the second fabric is conductive wire@polyester weft-knitted fabric or polyester weft-knitted fabric; when the first fabric is nylon weft-knitted fabric, the second fabric is conductive wire@polyester weft-knitted fabric.

In the present invention, the conductive wire@polyester weft-knitted fabric is obtained by weft-knitting conductive wire@polyester composite yarn, and the conductive wire@polyester composite yarn is a core-sheath structure, including core yarn and covering The braided fiber layer on the surface of the core yarn, the core yarn is a conductive wire, and the braided fiber layer is two-dimensionally braided by polyester yarn as a braided yarn.

In the present invention, the conductive wire is preferably carbon-based conductive fiber, stainless steel wire, gold wire, copper wire, silver wire or silver-plated copper wire. The diameter of the conductive wire is preferably 0.1mm.

In the present invention, the diameter of the polyester yarn is preferably 0.1 to 0.13 mm. In the present invention, the polyester yarn is a single yarn or a strand; the specification of the polyester yarn is preferably 70D/2 strands or 120D/2 shares. In the present invention, the polyester yarn is made of polyester fiber; in the present invention, the polyester single yarn is polyester fiber.

In the present invention, the preparation method of the polyester fiber preferably comprises the following steps:

The polyester masterbatch is melt-spun to obtain the polyester fiber.

In the present invention, the melt spinning is preferably performed in melt spinning equipment. The spinning temperature of the melt spinning is preferably 150-200°C, more preferably 160-180°C; the extrusion rate of the melt spinning is preferably 600-1100mm·min ^-1 , more preferably 650-1000mm· min ⁻¹ ; the fiber drawing temperature of the melt spinning is preferably 100˜160° C., more preferably 120˜150° C.; the drawing ratio of the melt spinning is preferably 1:1˜1:3.5. In the present invention, the drafting ratio is the ratio of the drafting (two-drawing) speed to the drawing (drawing) speed.

In the present invention, the preparation method of the conductive wire@polyester composite yarn preferably includes the following steps:

The conductive wire is used as the core yarn, the polyester yarn is used as the weaving yarn, and the fiber layer is evenly woven on the surface of the conductive wire by a two-dimensional weaving method to obtain the conductive wire@polyester composite yarn. In the present invention, the two-dimensional weaving is preferably performed using a semi-automatic two-dimensional weaving machine. In the present invention, the parameters of the two-dimensional weaving preferably include: the number of spindles of nylon yarn is preferably 6 to 18, more preferably 10 to 15; the traction tension is preferably 0.15 to 0.27N, more preferably 0.18 ~0.25N; the knitting speed is preferably 9.5~15mm/min, more preferably 10~13mm/min.

In the present invention, the preparation method of the conductive wire @polyester weft knitted fabric preferably includes the following steps:

Using a weft knitting method, the conductive wire @ polyester composite yarn is woven into the conductive wire @ polyester weft knitted fabric. In the present invention, the weaving is preferably carried out in the knitting area of the weft knitting machine, and the weft knitting method preferably includes sequentially performing unknitting, lapping, bending, belting, closing, looping, and stripping. In the present invention, the obtained knitted fabric is uniformly drawn during the weft knitting process.

In the present invention, the polyester weft-knitted fabric is obtained by weft-knitting polyester yarns.

In the present invention, the preparation method of the polyester weft knitted fabric preferably comprises the following steps:

Using a weft knitting method, the polyester yarn is woven into the polyester weft knitted fabric. In the present invention, the diameter of the polyester yarn is preferably 0.1 to 0.13 mm. In the present invention, the polyester yarn is a single yarn or a strand; the specification of the polyester yarn is preferably 70D/2 strands or 120D/2 shares. In the present invention, the polyester single yarn is polyester fiber. In the present invention, the preparation method of the polyester fiber is preferably the same as above, and will not be repeated here. In the present invention, the weaving is preferably carried out in the knitting area of the weft knitting machine, and the weft knitting method preferably includes sequentially performing unknitting, lapping, bending, belting, closing, looping, and stripping. In the present invention, the obtained knitted fabric is uniformly drawn during the weft knitting process.

In the present invention, the conductive wire@nylon weft-knitted fabric is obtained by weft-knitting the conductive wire@nylon composite yarn, and the conductive wire@nylon composite yarn is a core-sheath structure, including a core yarn and a coated The braided fiber layer on the surface of the core yarn, the core yarn is a conductive wire, and the braided fiber layer is formed by two-dimensional weaving of nylon yarn as a braided yarn.

In the present invention, the conductive wire is preferably copper wire, silver wire or silver-plated copper wire carbon-based conductive fiber, stainless steel wire, gold wire, copper wire, silver wire or silver-plated copper wire. The diameter of the conductive wire is preferably 0.1 mm.

In the present invention, the diameter of the nylon yarn is preferably 0.1 to 0.14mm; in the present invention, the nylon yarn is a single yarn or a strand; the specification of the nylon yarn is preferably 150D/2 strands or 100D/2 shares. In the present invention, the nylon yarn is made of nylon fiber, and in the present invention, the nylon single yarn is nylon fiber.

In the present invention, the preparation method of the nylon fiber preferably comprises the following steps:

The nylon masterbatch is melt-spun to obtain the nylon fiber.

In the present invention, the melt spinning is preferably performed in melt spinning equipment. The spinning temperature of the melt spinning is preferably 150-200°C, more preferably 160-180°C; the extrusion rate of the melt spinning is preferably 600-1100mm·min ^-1 , more preferably 650-1000mm· min ⁻¹ ; the fiber drawing temperature of the melt spinning is preferably 100˜160° C., more preferably 120˜150° C.; the drawing ratio of the melt spinning is preferably 1:1˜1:3.5.

In the present invention, the preparation method of the conductive wire@nylon composite yarn preferably includes the following steps:

The conductive wire is used as the core yarn, the nylon yarn is used as the weaving yarn, and the fiber layer is evenly woven on the surface of the conductive wire by a two-dimensional weaving method to obtain the conductive wire@nylon composite yarn. In the present invention, the two-dimensional weaving is preferably performed using a semi-automatic two-dimensional weaving machine. In the present invention, the parameters of the two-dimensional weaving preferably include: the number of spindles of nylon yarn is preferably 6 to 18, more preferably 10 to 15; the traction tension is preferably 0.15 to 0.27N, more preferably 0.18 ~0.25N; the knitting speed is preferably 9.5~15mm/min, more preferably 10~13mm/min.

In the present invention, the preparation method of the conductive wire @nylon weft knitted fabric preferably includes the following steps:

Using a weft knitting method, the conductive wire @nylon composite yarn is woven into the conductive wire @nylon weft knitted fabric. In the present invention, the weaving is preferably carried out in the knitting area of the weft knitting machine, and the weft knitting method preferably includes sequentially performing unknitting, lapping, bending, belting, closing, looping, and stripping. In the present invention, the obtained knitted fabric is uniformly drawn during the weft knitting process.

In the present invention, the nylon weft-knitted fabric is obtained by weft-knitting nylon yarns.

In the present invention, the preparation method of the nylon weft knitted fabric preferably comprises the following steps:

Using a weft knitting method, the polyester yarn is woven into the polyester weft knitted fabric. In the present invention, the diameter of the nylon yarn is preferably 0.1 to 0.14mm; in the present invention, the nylon yarn is a single yarn or a strand; the specification of the nylon yarn is preferably 150D/2 strands or 100D/2 shares. In the present invention, the nylon single yarn is nylon fiber. In the present invention, the preparation method of the nylon fiber is preferably the same as above, and will not be repeated here. In the present invention, the weaving is preferably carried out in the knitting area of the weft knitting machine, and the weft knitting method preferably includes sequentially performing unknitting, lapping, bending, belting, closing, looping, and stripping. In the present invention, the obtained knitted fabric is uniformly drawn during the weft knitting process.

In the present invention, when the first fabric and the second fabric are connected by a plurality of positioning stitching points, the friction nano-power generation fabric is divided into a plurality of separate friction units by the positioning stitching points. In a natural state, each The first fabric and the second fabric are not in contact with each other in the separation friction unit.

In the present invention, the natural state is that the triboelectric nanometer fabric is in a relaxed state.

In the present invention, the linear distance between two adjacent positioning suture points is preferably 0.5-5 cm, more preferably 1-4.5 cm.

In the present invention, in two adjacent separation friction units, the total length of the first fabric is equal to the total length of the second fabric, and both are greater than the distance between two adjacent positioning stitching points. twice the straight-line distance.

In a specific embodiment of the present invention, when the length of the second fabric in one of the two adjacent separation friction units is equal to the linear distance between the two adjacent positioning stitching points, The length of the first fabric material is greater than the linear distance between the two adjacent positioning stitching points; in another separation unit, the length of the second fabric is greater than the distance between the adjacent two positioning stitching points The straight-line distances are equal, and the length of the first fabric is equal to the straight-line distance between two adjacent positioning stitching points. In the present invention, the first fabric and the second fabric are separated from each other in the separation friction unit through length adjustment, that is, the first fabric and the second fabric do not contact each other.

The present invention provides a kind of frictional nano power generation fabric, when comprising the third fabric and the fourth fabric that are stacked, the third fabric is conductive wire @nylon weft knitted fabric and polyester weft knitted fabric connected at intervals; the first fabric Four fabrics are polyester weft knitted fabrics.

In the present invention, the structures and preparation methods of the conductive wires@nylon weft-knitted fabric and polyester weft-knitted fabric are preferably the same as above, and will not be repeated here.

In the present invention, the third fabric is conductive wire @nylon weft knitted fabric and polyester weft knitted fabric connected at intervals; the conductive wire @nylon weft knitted fabric and polyester weft knitted fabric are connected at intervals preferably by stitching Or weft-knitted connection; the suture connection is conductive wire @nylon weft-knitted fabric and polyester weft-knitted fabric stitched by cotton thread. The weft knitting connection is that the conductive wire @ nylon composite yarn and the polyester yarn are weft knitted to obtain conductive wire @ nylon weft knitted fabric and polyester weft knitted fabric connected at intervals. The present invention has no special requirements on the specific implementation process of the suturing, and the suturing method well known to those skilled in the art can be used. In the present invention, the weft knitting method when the conductive wire@nylon composite yarn and the polyester yarn are weft knitted at intervals is preferably the same as the weft knitting method of the conductive wire@nylon weft knitted fabric, No more details here.

The frictional nanometer power generation fabric provided by the present invention specifically includes: contact separation-sliding type friction nanometer power generation fabric, single electrode type friction nanometer power generation fabric and independent friction type friction nanometer power generation fabric.

In the present invention, the contact-separation-sliding friction nano-power generation fabric includes a first fabric and a second fabric, the first fabric is conductive wire @nylon weft knitted fabric, and the second fabric is conductive wire @polyester Weft-knitted fabric; the first fabric and the second fabric are connected by positioning stitching points; the contact separation-sliding friction nano-power generation fabric is divided into multiple separate friction units by the positioning stitching points, in a natural state, The first fabric and the second fabric are not in contact with each other in each separate friction unit.

In the present invention, as shown in Figure 7, the first fabric and the second fabric of the contact-separation-sliding friction nano-power generation fabric can maintain a relatively separated state in a natural state, and then connect electrical appliances at the end of the fabric to obtain contact separation - Sliding friction nanogenerator. The entire fabric is subjected to a transverse stretch-recovery cycle, during which the fabric will continuously output electrical signals. The contact-separation-sliding friction nano-power generation fabric can continuously and stably output electric signals through the synergistic effect of the contact-separation mode and the contact-slide mode, and can be used for energy collection generated during the use of fitness belts.

In the present invention, the single-electrode friction nano-power generation fabric includes a first fabric and a second fabric, the first fabric is a conductive wire@nylon weft-knitted fabric, and the second fabric is a polyester weft-knitted fabric; The first fabric and the second fabric are connected by a positioning stitching point; the single-electrode friction nano-power generation fabric is divided into a plurality of separate friction units by the positioning stitching point, and in a natural state, the first friction unit in each separate friction unit The first fabric and the second fabric do not touch each other.

In the present invention, as shown in Figure 9, the single-electrode friction nano-power generation fabric realizes relative separation of the two fabrics in the natural state, and the end fiber of the conductive wire @nylon knitted fabric is connected to the electrical appliance and then strictly grounded, that is A single-electrode triboelectric nanogenerator is obtained. Then the entire fabric is subjected to a transverse stretch-recovery cycle operation, during which the fabric can continuously output an alternating current signal, which can be used for energy harvesting during the use of the tension rope.

In the present invention, the independent frictional friction nano-power generation fabric includes a third fabric and a fourth fabric, the third fabric is conductive wire @nylon weft-knitted fabric and polyester weft-knitted fabric connected at intervals, the first The fabric is polyester weft-knitted fabric, and the third fabric and the fourth fabric are stacked.

In the present invention, as shown in FIG. 11 , during the relative movement of the friction pair of the independent frictional nanometer power generation fabric, the electric appliance can continuously detect the output electrical signal. In addition, it can be used to collect the energy generated by the friction between the arm and the body during human running.

The present invention provides a preparation method of the frictional nanometer power generation fabric described in the above technical solution, comprising the following steps:

The first fabric and the second fabric are stitched according to the stitching point to obtain the triboelectric nanometer fabric.

In the present invention, the positioning stitching is preferably staggered positioning stitching, and the staggered positioning stitching is: in adjacent separation friction units, in one of the separation units, the length of the first fabric is greater than the length of the second fabric, In another separation unit, the length of the first fabric is smaller than the length of the second fabric, as shown in FIG. 7 or 9 .

In the present invention, the positioning stitching is preferably performed on a flat lathe interlock sewing machine.

In the present invention, the positioning suture uses cotton thread as a suture, and the seam structure of the positioning suture is preferably a flat seam, a partial pressure seam, a crimping seam, a lap seam or a back and forth seam; the stitches of the positioning suture are preferably It is single-side covered chain stitch or double-sided covered chain stitch, the single-sided covered chain stitch is preferably three or four-sided single-sided covered chain stitch, and the double-sided covered chain stitch is preferably It is four-thread or five-thread double-sided covering chain stitch; the stitch density of the positioning stitching is preferably 7 stitches/2cm to 10 stitches/2cm; the needle type of the positioning stitching is preferably No. 9 to No. 16.

The present invention provides the application of the friction nano power generation fabric described in the above technical solution or the friction nano power generation fabric prepared by the preparation method described in the above technical solution in a friction nano power generation device.

In the present invention, it is preferable to connect the frictional nano power generation fabric to electrical appliances to form a current loop, and then move through a transverse stretch-recovery cycle (as shown in Figure 7 and Figure 9 ), or through relative frictional movement to achieve power generation.

In the present invention, the fabric that uses transverse stretching-recovery cyclic motion to generate electricity is a contact-separation-sliding type friction nano-power generation fabric or a single-electrode type friction nano-power generation fabric.

In the present invention, the fabric that uses relative frictional motion to generate electricity is an independent frictional friction nanometer power generation fabric.

The friction nano power generation fabric provided by the present invention weaves a nylon or polyester fiber layer two-dimensionally on the surface of the conductive wire, effectively hides the conductive wire in the composite yarn, effectively avoids the wear or break of the conductive wire, and ensures that the friction nano power generation fabric maintains output The signal is stable, while improving the wearing comfort, flexibility and durability of the device.

The friction nano power generation fabric provided by the present invention (contact separation-sliding friction nano power generation fabric) can effectively improve the electrical output performance of the fabric through the synergistic effect of two working modes, and provides an effective reference for a new type of wearable friction nano engine, which is beneficial to Promote the practical application of flexible triboelectric nanogenerators.

In order to further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below in conjunction with the accompanying drawings and examples, but they should not be construed as limiting the protection scope of the present invention.

Example 1

According to the preparation process shown in Figure 1, the nylon masterbatch was added to the hopper of the melt spinning equipment, and then, at a spinning temperature of 150°C, an extrusion speed of 600mm·min ^-1 , and a fiber drawing temperature of 100°C, the Carry out melt spinning under the working parameter condition that ratio is 1:1, obtain nylon fiber;

Put the polyester masterbatch into the hopper of the melt spinning equipment, and then, at a spinning temperature of 150°C, an extrusion speed of 600mm·min ^-1 , a fiber drawing temperature of 100°C, and a draft ratio of 1:1 Carry out melt spinning under parameter condition, obtain polyester fiber;

According to the preparation process in Figure 1 and Figure 2, copper wire with a diameter of 0.1mm is used as the core yarn, nylon yarn with a diameter of 0.1mm (white and transparent) is used as the weaving yarn, and a semi-automatic two-dimensional braiding machine is used to evenly weave fibers on the outside of the copper wire layer, wherein: the number of spindles used for nylon yarn is 12 spindles for two-dimensional weaving core-spun yarn; according to the number of spindles selected, prepare to wind 12 groups of outer wrapping bobbins (the bottom of the bobbins is a right-angle tooth shape), and the bobbins Placed on the yarn carrier; a tension device is placed under the knitting machine. After the core yarn obtains tension through the tension device, it is fed along the axial direction of the final formed yarn; passes through the center of the orbital disc, and passes through the yarn forming device together with the weaving yarn, and is fixed On the extraction mechanism; set the weaving speed to 14.5mm/min, the traction tension to 0.15N, turn on the machine to realize the weaving of the core-spun yarn, and finally weave it into a copper@nylon composite yarn. The side view is shown in Figure 3;

According to the preparation process in Figure 1 and Figure 2, copper wire with a diameter of 0.1 mm is used as the core yarn, polyester yarn with a diameter of 0.1 mm (black, 70D/2 strands) is used as the braiding yarn, and a semi-automatic two-dimensional braiding machine is used on the outside of the copper wire Weave the fiber layer evenly, wherein: the number of spindles used for polyester yarn is 12 spindles for two-dimensional weaving of core-spun yarn; according to the number of spindles selected, prepare to wind 12 groups of outer wrapping bobbins (below the bobbin is a right-angle tooth shape), Place the bobbin on the yarn carrier; place a tension device under the knitting machine. After the core yarn obtains tension through the tension device, it is fed along the axial direction of the final formed yarn; passes through the center of the orbital disk, and passes through the yarn forming together with the weaving yarn fixed on the extraction mechanism; set the weaving speed to 14.5mm/min, the traction tension to 0.15N, turn on the machine to realize the weaving of the core-spun yarn, and finally weave it into a copper@polyester composite yarn. The side view and cross-sectional view are shown in the figure 4 shown;

According to the preparation process of Fig. 1 and Fig. 2, the polyester yarn (white, 120D/2 strands) with a diameter of 0.13mm is used for two-dimensional weaving by a semi-automatic two-dimensional knitting machine, wherein: the number of spindles used by the polyester yarn is 12 spindles for two-dimensional weaving of core-spun yarn; according to the number of selected spindles, prepare to wind 12 groups of wrapping yarn bobbins (the bottom of the bobbins is a right-angle tooth shape), and place the bobbins on the yarn carrier; pass through the yarn forming device together, Fix it on the extraction mechanism; set the weaving speed to 14.5mm/min, turn on the machine, realize the weaving of polyester yarn, and finally weave polyester yarn, the side view is shown in Figure 5;

Copper@nylon composite yarn and copper@polyester composite are adopted with a single-cylinder latch needle weft circular machine (tube diameter: 762mm, or 30 inches; number of channels: 3 channels/inch tube diameter, 90 channels; number of needle channels: 4) Yarn and polyester yarn are transported to the knitting area of the weft knitting machine respectively, and according to the knitting process: unwinding - lapping - closing - looping - bending - stripping - knitting - pulling, and at the same time The obtained knitted fabrics were uniformly pulled to obtain copper@nylon weft jersey knitted fabrics, copper@polyester weft jersey knitted fabrics and polyester weft jersey knitted fabrics. Each fabric was about 4cm×12cm. The relaxed and stretched state of the fabrics is shown in the figure 6.

Example 2

Select the linear distance between two adjacent positioning suture points to be 5cm, select cotton thread as the suture, and use the flat lathe interlock sewing machine to use the copper@nylon weft jersey knitted fabric prepared in Example 1 as the first fabric (positive electrode material ), the copper@polyester weft jersey knitted fabric prepared in implementation 1 was used as the second fabric (negative electrode material), and stitched at intervals according to the structure shown in Figure 7. The stitching parameters included: the seam structure was flat seam; Three-thread or four-thread one-sided covering chain stitch; stitch density is 7 stitches/2cm; needle type is No. 9, friction nano-power generation fabric, recorded as contact separation-sliding friction nano-power generation fabric, the optical photo is shown in Figure 8 shown.

Example 3

Select the linear distance between two adjacent positioning suture points to be 5cm, select cotton thread as the suture, and use the flat lathe interlock sewing machine to use the copper@nylon weft jersey knitted fabric prepared in Example 1 as the first fabric (positive electrode material ), the polyester weft jersey knitted fabric prepared in Example 1 is used as the second fabric (friction pair material), and is stitched at intervals according to the structure shown in Fig. Three-thread or four-thread one-sided covering chain stitch; stitch density is 7 needles/2cm; needle type is No. 9, and the friction nano-power generation fabric is recorded as single-electrode friction nano-power generation fabric. The optical photo is shown in Figure 10. ;

Example 4

Two pieces of copper@nylon weft jersey knitted fabrics prepared in Example 1 are separated into a piece of polyester weft jersey knitted fabric prepared in Example 1 to form a spacer knitted fabric. According to Figure 11, the spacer knitted fabric is used as the first fabric, overlapping Place it on the surface of a piece of polyester weft jersey knitted fabric prepared in Example 1 as the second fabric (friction pair material) to obtain a frictional nanometer power generation fabric, which is recorded as an independent friction type friction nanometer power generation fabric, and the optical photo is shown in Figure 12 .

Application example 1

Connect the positive and negative electrodes of the contact-separation-sliding friction nano-power generation fabric prepared in Example 2 to form a circuit to obtain a friction nano-generator, and perform a transverse stretch-recovery cycle on the contact-separation-sliding friction nano-power generation fabric. During this process, the fabric will continue to output electrical signals, and the electrical output performance is shown in Figure 13.

The end fibers of the copper@nylon knitted fabric (positive electrode material) in the single-electrode friction nano-power generation fabric prepared in Example 3 were connected to electrical appliances and then strictly grounded to obtain a single-electrode friction nano-power generation loom. Then, the entire single-electrode triboelectric nanogenerator fabric is subjected to a transverse stretching-recovery cycle operation. During this process, the fabric can continuously output AC signals, and the electrical output performance diagram is shown in Figure 14.

Connect the two pieces of copper@nylon weft jersey knitted fabrics in the spacer knitted fabric of the frictional nano power generation fabric prepared in Example 4 to form a circuit, so that the two overlapped fabrics undergo friction cycles in opposite directions, and an independent frictional friction Nano power loom. During the relative movement of the friction pair, the electrical appliance can continuously detect the output electrical signal, and the obtained electrical output performance diagram is shown in Figure 15.

Example 5

According to the preparation process shown in Figure 1, the nylon masterbatch was added to the hopper of the melt spinning equipment, and then, at a spinning temperature of 150°C, an extrusion speed of 600mm·min ^-1 , and a fiber drawing temperature of 100°C, the Carry out melt spinning under the working parameter condition that ratio is 1:1, obtain nylon fiber;

Put the polyester masterbatch into the hopper of the melt spinning equipment, and then, at a spinning temperature of 150°C, an extrusion speed of 600mm·min ^-1 , a fiber drawing temperature of 100°C, and a draft ratio of 1:1 Carry out melt spinning under parameter condition, obtain polyester fiber;

According to the preparation process in Figure 1 and Figure 2, copper-plated silver wire with a diameter of 0.1 mm is used as the core yarn, and nylon yarn with a diameter of 0.14 mm (off-white, 150D/2 strands) is used as the weaving yarn, and a semi-automatic two-dimensional braiding machine is used in the The fiber layer is evenly woven on the outside of the copper-plated silver wire, wherein: the number of spindles used for the nylon yarn is 8 spindles for two-dimensional weaving of the core-spun yarn; according to the number of spindles selected, 8 groups of outer wrapping bobbins are prepared to be wound (below the bobbins are Right-angle tooth shape), the bobbin is placed on the yarn carrier; a tension device is placed under the knitting machine, and the core yarn is fed along the axial direction of the final formed yarn after getting tension through the tension device; passing through the center of the orbital disc, and the weaving The yarns pass through the yarn forming device together and are fixed on the extraction mechanism; set the weaving speed to 15mm/min, the traction tension to 0.15N, turn on the machine to realize the weaving of the core-spun yarn, and finally weave into copper-plated silver@nylon composite yarn, the side The diagram and section are shown in Figure 16;

According to the preparation process of Figure 1 and Figure 2, copper-plated silver wire with a diameter of 0.1mm is used as the core yarn, and polyester yarn (white, 120D/2 strands) with a diameter of 0.13mm is used as the weaving yarn, and a semi-automatic two-dimensional braiding machine is used on the copper The fiber layer is evenly woven on the outside of the silver-plated wire, wherein: the number of spindles used for the polyester yarn is 8 spindles for two-dimensional weaving of the core-spun yarn; according to the number of spindles selected, 8 sets of outer wrapping bobbins are prepared to be wound (the bottom of the bobbin is a right-angled bobbin). Tooth shape), the bobbin is placed on the yarn carrier; a tension device is placed under the knitting machine, and the core yarn is fed along the axial direction of the final formed yarn after obtaining tension through the tension device; passing through the center of the orbital disc, and the weaving yarn Pass through the yarn forming device together and fix it on the extraction mechanism; set the weaving speed to 15mm/min, the traction tension to 0.15N, turn on the machine to realize the weaving of the core-spun yarn, and finally weave into copper-plated silver@polyester composite yarn, side view And the cross-sectional view is shown in Figure 17;

According to the preparation process of Fig. 1 and Fig. 2, the polyester yarn (white, 120D/2 strands) with a diameter of 0.13mm is used for two-dimensional weaving by a semi-automatic two-dimensional knitting machine, wherein: the number of spindles used by the polyester yarn is 8-spindle two-dimensional weaving core-spun yarn; according to the number of selected spindles, prepare to wind 8 groups of outer-wrapped yarn bobbins (the bottom of the bobbin is a right-angle tooth shape), and place the bobbin on the yarn carrier; pass through the yarn forming device together, Fix it on the extraction mechanism; set the weaving speed to 15mm/min, turn on the machine to realize the weaving of polyester yarn, and finally weave it into polyester yarn;

Using a single-cylinder latch needle weft circular machine (tube diameter: 762mm, or 30 inches; number of channels: 3 channels/inch tube diameter, 90 channels; number of needle channels: 4) to silver-plate copper@nylon composite yarn and copper-plate The silver@polyester composite yarn and the polyester yarn are transported to the loop forming area of the weft knitting machine respectively, and follow the loop forming process: unwinding-lapping yarn-closing-looping-bending yarn-off looping-looping-drawing Pull, and the obtained knitted fabric is evenly pulled simultaneously to obtain copper-plated silver@nylon weft jersey knitted fabric, copper-plated silver@polyester weft jersey knitted fabric and polyester weft jersey knitted fabric, each fabric is about 4cm×12cm, and the fabric The relaxed and stretched states are shown in Figure 6.

Example 6

Select the linear distance between two adjacent positioning suture points to be 5cm, select cotton thread as the suture, and adopt the flat lathe interlock sewing machine to use the copper-plated silver@nylon latitude jersey knitted fabric prepared in Example 5 as the first fabric ( positive electrode material), the copper-plated silver@polyester weft jersey knitted fabric prepared in Example 5 is used as the second fabric (negative electrode material), and is stitched at intervals according to the structure shown in Figure 7, and the stitching parameters include: the stitching structure is flat Stitches are three-thread or four-thread single-sided covered chain stitches; stitch density is 7 needles/2cm; needle type is No. 9, friction nano-power generation fabrics, recorded as contact separation-sliding friction nano-power generation fabrics, Optical photographs are shown in Figure 18.

Example 7

Select the linear distance between two adjacent positioning suture points to be 5cm, select cotton thread as the suture, and adopt the flat lathe interlock sewing machine to use the copper-plated silver@nylon latitude jersey knitted fabric prepared in Example 5 as the first fabric ( Positive electrode material), the polyester weft jersey knitted fabric prepared in Example 5 is used as the second fabric (friction pair material), and is stitched at intervals according to the structure shown in Figure 9, and the stitching parameters include: the stitching structure is flat stitching; The stitches are three-thread or four-thread single-sided covered chain stitches; the stitch density is 7 stitches/2cm; the needle type is No. 9, and the friction nano-power generation fabric is recorded as a single-electrode friction nano-power generation fabric. The optical photo is shown in Figure 19 shown.

Example 8

Two pieces of copper-plated silver@nylon weft jersey knitted fabrics prepared in Example 5 are separated into a piece of polyester weft jersey knitted fabric prepared in Example 5 to form a spacer knitted fabric. According to Figure 11, the spacer knitted fabric is used as the first fabric , superimposed on the surface of a piece of polyester weft jersey knitted fabric prepared in Example 5 as the second fabric (friction pair material), to obtain a frictional nanometer power generation fabric, which is recorded as an independent frictional friction nanometer power generation fabric, and the optical photo is as shown in Figure 20 shown.

Application example 2

Connect the positive and negative electrodes of the contact-separation-sliding friction nano-power generation fabric prepared in Example 6 to form a circuit to obtain a friction nano-generator, and perform a transverse stretching-recovery cycle on the contact-separation-sliding friction nano-power generation fabric. During this process, the fabric will continue to output electrical signals, and the electrical output performance is shown in Figure 21.

Connect the end fiber of the copper-plated silver@nylon knitted fabric (positive electrode material) in the single-electrode friction nano-power generation fabric prepared in Example 7 to the electrical appliance and then strictly ground it to obtain a single-electrode friction nano-power generation loom. Then, the entire single-electrode triboelectric nano-power generation fabric is subjected to a transverse stretching-recovery cycle operation, during which the fabric can continuously output alternating current signals, and the electrical output performance diagram is obtained as shown in Figure 22.

Connect the two pieces of copper@nylon weft jersey knitted fabrics in the spacer knitted fabric of the frictional nano power generation fabric prepared in Example 8 to form a circuit, so that the two overlapped fabrics perform friction cycles in opposite directions, that is, an independent friction friction Nano power loom. During the relative movement of the friction pair, the electrical appliance can continuously detect the output electrical signal, and the obtained electrical output performance diagram is shown in Figure 23.

Although the foregoing embodiment has described the present invention in detail, it is only a part of the embodiments of the present invention, rather than all embodiments, and other embodiments can also be obtained according to the present embodiment without inventive step, and these embodiments are all Belong to the protection scope of the present invention.

Claims (10)

1. A friction nano-generating fabric, comprising a first fabric and a second fabric; the first fabric and the second fabric are connected through a plurality of positioning sewing points; the friction nano power generation fabric is divided into a plurality of separation friction units by the positioning joint points, and in a natural state, the first fabric and the second fabric in each separation friction unit are not contacted with each other;

the first fabric comprises conductive wires @ nylon weft-knitted fabric or nylon weft-knitted fabric;

when the first fabric is a conductive wire material@nylon weft-knitted fabric, the second fabric is a conductive wire material@polyester weft-knitted fabric or polyester weft-knitted fabric;

when the first fabric is a nylon weft-knitted fabric, the second fabric is a conductive wire material@terylene weft-knitted fabric;

the conductive wire material@nylon weft-knitted fabric is obtained by weft-knitting conductive wire material@nylon composite yarns, and the conductive wire material@nylon composite yarns comprise conductive wire materials and nylon woven fiber layers coated on the surfaces of the conductive wire materials;

The conductive wire material@polyester weft-knitted fabric is obtained by weft-knitting conductive wire material@polyester composite yarns, and the conductive wire material@polyester composite yarns comprise conductive wire materials and polyester knitting fiber layers coated on the surfaces of the conductive wire materials;

the nylon weft-knitted fabric is obtained by weft-knitting nylon yarns;

the terylene weft knitting fabric is obtained by weft knitting of terylene yarns.

2. The friction nano power generation fabric is characterized by comprising a third fabric and a fourth fabric which are arranged in a laminated manner;

the third fabric is formed by connecting conductive wires @ nylon weft-knitted fabric and polyester weft-knitted fabric at intervals; the fourth fabric is a terylene weft knitting fabric;

the conductive wire material@nylon weft-knitted fabric is obtained by weft-knitting conductive wire material@nylon composite yarns, and the conductive wire material@nylon composite yarns comprise conductive wire materials and nylon woven fiber layers coated on the surfaces of the conductive wire materials;

the terylene weft knitting fabric is obtained by weft knitting of terylene yarns.

3. A friction nano electricity generating fabric according to claim 1, wherein the linear distance between two adjacent positioning seam points is 0.5-5 cm.

4. A friction nano electricity generating fabric according to claim 3, wherein the total length of the first fabric and the total length of the second fabric in two adjacent separated friction units are equal and are each greater than 2 times of the straight line distance between two adjacent positioning seam points.

5. A friction nano electricity generating fabric according to claim 1 or 2, wherein the conductive wires are independently carbon-based conductive fibers, stainless steel wires, gold wires, copper wires, silver wires or silver-plated copper wires.

6. The friction nano power generation fabric according to claim 1, wherein the preparation method of the conductive wire @ nylon composite yarn or the conductive wire @ polyester composite yarn comprises the following steps:

taking the conductive wire as a core yarn, taking nylon yarn or polyester yarn as a weaving yarn, and weaving a fiber layer on the surface of the conductive wire by adopting a two-dimensional weaving method to obtain the conductive wire@nylon composite yarn or the conductive wire@polyester composite yarn; the diameter of the conductive wire is 0.1mm; the diameter of the nylon yarn is 0.1-0.14 mm, and the specification of the nylon yarn is 150D/2 strands or 100D/2 strands; the diameter of the polyester yarn is 0.1-0.13 mm, and the specification of the polyester yarn is 70D/2 strands or 120D/2 strands;

the parameters of the two-dimensional weave include: the number of the spindles of the nylon yarns or the polyester yarns is independently 6-18; traction tension is independently 0.15-0.27N; the braiding speed is 9.5-15 mm/min.

7. The friction nano power generation fabric according to claim 6, wherein the polyester yarn or nylon yarn is made of polyester fiber or nylon fiber, and the preparation method of the polyester fiber or nylon fiber comprises the following steps:

Melt spinning the polyester master batch or the nylon master batch to obtain the polyester yarn or the nylon yarn; the spinning temperature of the melt spinning is independently 150-200 ℃; the extrusion rate of the melt spinning is independently 600-1100 mm min ^-1 The method comprises the steps of carrying out a first treatment on the surface of the The fiber drafting temperature of the melt spinning is independently 100-160 ℃; the draft ratio of the melt spinning is independently 1:1 to 1:3.5.

8. The method for preparing the friction nano power generation fabric as set forth in claim 1, comprising the steps of:

and carrying out positioning sewing on the first fabric and the second fabric according to positioning sewing points to obtain the friction nano power generation fabric.

9. The method according to claim 8, wherein the positioning suture uses cotton thread as suture thread, and the seam structure of the positioning suture is flat seam, split seam, buckling seam, lap seam or go seam; the stitch of the positioning stitching is a single-sided covered chain stitch or a double-sided covered chain stitch, the single-sided covered chain stitch is a three-wire or four-wire single-sided covered chain stitch, and the double-sided covered chain stitch is a four-wire or five-wire double-sided covered chain stitch; the stitch density of the positioning stitching is 7 needles/2 cm-10 needles/2 cm; the needle model of the positioning suture is 9-16.

10. Use of the friction nano power generation fabric according to any one of claims 1 to 7 or the friction nano power generation fabric prepared by the preparation method according to claim 8 or 9 in a friction nano power generation device.

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