CN114351482B - Electrochromic artistic garment fabric and preparation method and application thereof - Google Patents

Abstract

The invention discloses an electrochromic art clothing fabric and a preparation method and application thereof. The method is as follows: (1) soaking the cloth in a silver nanowire solution to prepare a conductive cloth, (2) dissolving the water-phase electrochromic material and the organic-phase conductive polymer material in water to obtain an electrochromic dye emulsion, (3) ) screen-printing the electrochromic dye emulsion on the surface of the conductive fabric in step (1), and then standing in a humid environment to layer the conductive polymer material and the electrochromic material up and down to obtain an electrochromic art clothing fabric. The present invention proposes for the first time a liquid-phase "self-layering" strategy of obtaining two-layer films at the same time in a single printing, so that the light organic phase floats on the heavy water phase and is dried to obtain two-layer films at the same time. The process is simple and efficient, and the electrical The actual structure of the photochromic fabric is only 3 layers, and the structure is simple.

Description

An electrochromic art clothing fabric and its preparation method and application

technical field

The invention belongs to the technical field of electrochromism, and in particular relates to an electrochromic art clothing fabric and a preparation method and application thereof.

Background technique

The development of electrochromic technology has greatly enriched people's lives, allowing people to change the appearance and color of items according to their wishes, while achieving many effects such as energy saving, shading, beautification and information display. The principle of electrochromism is that the redox state of the material itself is controlled by an electric field, the shape of the electron cloud of the core atoms of the material is changed, and photons are selectively absorbed when passing through these materials, thereby causing a color change.

Traditional electrochromic technology has been widely used in smart windows, car windshields, car rearview mirrors, passive displays, electronic labels, sunglasses and many other fields. In these application scenarios, electrochromic devices are usually designed as a stacked (conductive layer, electrochromic layer, ion transport layer, ion storage layer, conductive layer) device structure, depending on the flexibility of the substrate material and can be Divided into rigid electrochromic devices and flexible electrochromic devices.

With the improvement of people's pursuit of quality of life, personalized and diversified clothing has become the choice of people's fashion trends. The promotion of electrochromic technology is expected to bring new development opportunities to fashion clothing. However, the existing glass electrochromic technology basically cannot be well migrated and applied to the existing clothing, and there are adverse effects such as heavy clothing and unsightly appearance. How to balance the basic wearing function and electrochromic function of clothing is a technical problem that needs to be solved urgently in the development of electrochromic clothing.

SUMMARY OF THE INVENTION

In order to solve the shortcomings and deficiencies of the prior art, the primary purpose of the present invention is to provide a method for preparing electrochromic art clothing fabrics.

Another object of the present invention is to provide an electrochromic art clothing fabric prepared by the above method.

Another object of the present invention is to provide the above-mentioned electrochromic art clothing fabric.

The object of the present invention is achieved through the following technical solutions:

A preparation method of electrochromic art clothing fabric, comprising the following steps:

(1) after soaking the cloth in the silver nanowire solution for a period of time, take it out and wash it with water, then place it in the silver nanowire solution and repeat the operations of soaking and cleaning several times, and dry to obtain a conductive cloth;

(2) dissolving the water-phase electrochromic material and the organic-phase conductive polymer material in water to obtain an electrochromic dye emulsion;

(3) screen-printing the electrochromic dye emulsion on the surface of the conductive fabric in step (1), and then placing it in a humid environment for a period of time to make the conductive polymer material and the electrochromic material layer up and down to form an interface to obtain electrochromic The printing and dyeing layer is dried to obtain electrochromic art clothing fabric.

Preferably, the material of the cloth in step (1) is at least one of cotton, hemp, nylon and nylon, and the density of the cloth is 150-400 g/m ² .

Preferably, the silver solid content in the silver nanowire solution in step (1) is 10-15 wt.%, the average wire length of the silver nanowires is 30-50 μm, and the average wire diameter is 10-20 nm.

Preferably, the soaking in step (1) is performed in ultrasonic oscillation, and the ultrasonic power is 200-350W.

Preferably, the soaking time of each step (1) is 12-36 min; the soaking is repeated 3-5 times.

Preferably, the water-phase electrochromic material in step (2) is at least one of tungsten polyoxometalate and molybdenum polyoxometalate; the organic phase conductive polymer material is polyethylene dioxythiophene (PEDOT ) and its derivatives.

Preferably, the molar ratio of the water-phase electrochromic material and the organic-phase conductive polymer material in step (2) is 1:1 to 1.5:1; in the electrochromic dye emulsion, the water-phase electrochromic material is The concentration is 0.01～0.05mol/L.

Preferably, before the screen printing of the electrochromic dye emulsion in step (3), ultrasonic oscillation is required for uniform dispersion, the ultrasonic oscillation time is 10-30 min, and the oscillation power is 60-120 W.

Preferably, the mesh size of the screen printing in step (3) is 300-500 meshes.

Preferably, the humidity of the humid environment in step (3) is 75-95% RH, and the temperature is 20-25°C.

Preferably, the time for placing in a humid environment in step (3) is 12-24 hours.

Preferably, in the electrochromic art clothing fabric of step (3), the cloth (silver nanowires) and the electrochromic printing and dyeing layer are respectively drawn out with metal wires, and then connected to the peripheral driving circuit to realize electrochromic.

An electrochromic art clothing fabric prepared by the above method.

The application of the above-mentioned electrochromic art clothing fabric in the fields of art clothing and stage curtains.

Preferably, the artistic clothing is dance clothing.

The working principle of the present invention:

One side of the silver nanowires in the fabric is connected to the positive electrode, one side of the conductive polymer is connected to the negative electrode, and the voltage is set to 3V. The silver nanowires are injected into the electrochromic material, which reduces the electrochromic material, thereby changing the color of the cloth. When a voltage in the opposite direction is applied, electrons are drawn out of the electrochromic material, and the electrochromic material returns to a colorless state.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The overall device structure is simple. Compared with the traditional 7-layer electrochromic device (substrate/conductive layer/electrochromic layer/electrolyte layer/ion storage layer/conductive layer/substrate), the electrochromic fabric is practical The structure is only 3 layers (electrode embedded conductive substrate/electrochromic layer/conductive layer). The ionic metal oxometalate electrochromic material has both electrochromic properties and good electronic isolation ability, which is equivalent to the role of electrolyte.

(2) The process is simple, efficient and low-cost. Traditional electrochromic devices rely on high-vacuum equipment for coating, and each layer of film needs to be deposited in sequence, which is cumbersome and time-consuming. The present invention adopts the solution process and does not need vacuum coating equipment, so the cost is low. For the first time, a liquid-phase "self-layering" strategy of obtaining two-layer films in a single printing is proposed. The light organic phase is floated on the heavy water phase and then dried to obtain two-layer films at the same time, so the process is simple and efficient.

Description of drawings

1 is a schematic diagram of the structure of the conductive fabric according to the present invention, wherein 100 refers to the whole of the conductive fabric, and 101 refers to the silver nanowires embedded in the fabric.

Figure 2 is a schematic diagram of the liquid phase "self-layering" process of the present invention, wherein 100 refers to the whole conductive fabric, 200 refers to the electrochromic dye (liquid phase) initially printed, 201 refers to an organic phase conductive polymer material, and 202 refers to a water-phase electrochromic dye Color changing material.

FIG. 3 shows the absorbance curves of the initial state, the colored state and the faded state of Example 1. FIG.

FIG. 4 is the initial state, colored state and faded state absorbance curves of Example 2. FIG.

Detailed ways

The present invention will be described in further detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

If the specific conditions are not indicated in the examples of the present invention, the conventional conditions or the conditions suggested by the manufacturer are used. The raw materials, reagents, etc., which are not specified by the manufacturer, are all conventional products that can be purchased from the market.

Example 1

(1) Select cotton cloth (density is 250g/m ² ), first soak the cotton cloth in a silver nanowire solution with a silver solid content of 12wt.%, the average wire length of the silver nanowires is 40 μm, and the average wire diameter is 15nm, and ultrasonic vibration treatment, the power is 300W, take out after 25min, and wash with deionized water to clean, repeat the soaking and cleaning operation in the above silver nanowire solution 5 times and then vacuum dry, Figure 1 shows the conductive fabric after the preparation is completed Schematic diagram of the results;

(2) Preparation of electrochromic dye emulsion: The aqueous phase tungsten metal oxometalate electrochromic material and the organic phase conductive polymer material polyethylenedioxythiophene (PEDOT) were mixed in deionized water solvent at a molar ratio of 1.2:1 Mixed in medium, wherein the concentration of tungsten metal oxometalate is 0.02mol/L;

(3) Before printing, ultrasonically oscillate the electrochromic dye for 20min, and the oscillation power is 80W;

(4) screen-print the electrochromic emulsion that has been shaken on the surface of the conductive fabric prepared in step 1. The screen mesh size is 400 mesh. After the screen printing is completed, the fabric is placed in a humid environment of 85% RH and a temperature of 25°C for 20 hours to form water. Phase and organic phase interface, Figure 2 shows a schematic diagram of the process;

(5) Finally, vacuum drying the conductive cloth printed with electrochromic dye, the cloth and the electrochromic printing and dyeing layer are drawn out with metal wires respectively, and connected to the peripheral driving circuit;

The electrochromic clothing fabric prepared in Example 1 was tested:

3 is the absorbance curve of the electrochromic initial state, colored state and faded state of Example 1. Connect the silver nanowire side of the fabric to the positive electrode, the conductive polymer side to the negative electrode, and set the voltage to 3V. After energizing for 300s, the fabric is colored, and the absorbance in the infrared band is significantly improved; Absorption is reduced. Taking the wavelength of 600 nm as an example, the absorbance in the initial state of Example 1 is 0.02, the absorbance in the colored state is 0.42, and the absorbance in the faded state is 0.13.

Example 2

(1) Select nylon material cloth (density is 300g/m ² ), first soak cotton cloth in silver nanowire solution with silver solid content of 15wt.%, the average wire length of silver nanowires is 40μm, and the average wire diameter is 15nm , and ultrasonically oscillated with a power of 300W, taken out after 25min, and washed with deionized water for cleaning, repeated soaking and cleaning in the above-mentioned silver nanowire solution for 5 times and then vacuum drying;

(2) Preparation of electrochromic dye emulsion: The aqueous phase molybdenum metal oxometalate electrochromic material and the organic phase conductive polymer material polyethylenedioxythiophene (PEDOT) were mixed in deionized water solvent at a molar ratio of 1.4:1 Mixed in medium, wherein the concentration of molybdenum metal oxometalate is 0.05mol/L;

(3) Before printing, ultrasonically oscillate the electrochromic dye for 30min, and the oscillation power is 80W;

(4) screen-print the electrochromic emulsion that has been shaken on the surface of the conductive fabric prepared in step 1. The screen mesh size is 400 mesh. After the screen printing is completed, the fabric is placed in a humid environment of 85% RH and a temperature of 25°C for 20 hours to form water. phase and organic phase interface;

(5) Finally, vacuum drying the conductive cloth printed with electrochromic dye, the cloth and the electrochromic printing and dyeing layer are drawn out with metal wires respectively, and connected to the peripheral driving circuit;

The electrochromic clothing fabric prepared in Example 2 was tested:

4 is the absorbance curve of the electrochromic initial state, colored state and faded state of Example 2. Connect one side of the silver nanowires in the fabric to the positive electrode, and one side of the conductive polymer to the negative electrode. The voltage is set to 3V. After 300s of electricity, the fabric is colored, and the absorbance of the infrared band is significantly improved; after reverse electricity is applied for 300s, the fabric fades, and each wavelength Absorption is reduced. Taking the wavelength of 600 nm as an example, the absorbance in the initial state of the specific embodiment 1 is 0.07, the absorbance in the colored state is 0.41, and the absorbance in the faded state is 0.10.

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, The simplification should be equivalent replacement manners, which are all included in the protection scope of the present invention.

Claims (8)

1. A preparation method of electrochromic artistic clothing fabric is characterized by comprising the following steps:

(1) Soaking the cloth in a silver nanowire solution for a period of time, taking out, washing with water, placing in the silver nanowire solution, repeating the soaking and washing operations for multiple times, and drying to obtain a conductive cloth;

(2) Dissolving a water-phase electrochromic material and an organic-phase conductive high polymer material in water to obtain an electrochromic dye emulsion;

(3) Silk-screen printing an electrochromic dye emulsion on the surface of the conductive fabric in the step (1), then placing the conductive fabric in a humid environment for a period of time to enable a conductive high polymer material and an electrochromic material to be layered up and down to form an interface, obtaining an electrochromic printing and dyeing layer, and drying to obtain an electrochromic artistic clothing fabric;

the aqueous phase electrochromic material in the step (2) is at least one of tungsten polyoxometallate and molybdenum polyoxometallate; the organic phase conductive polymer material is polyethylene dioxythiophene and derivatives thereof;

the humidity of the humid environment in the step (3) is 75-95% RH, and the temperature is 20-25 ℃; the time for placing in the humid environment is 12-24 h.

2. The preparation method of the electrochromic artistic clothing fabric as claimed in claim 1, wherein the molar ratio of the aqueous-phase electrochromic material to the organic-phase conductive polymer material in the step (2) is 1:1 to 1.5:1; in the electrochromic dye emulsion, the concentration of the aqueous phase electrochromic material is 0.01-0.05 mol/L.

3. The preparation method of the electrochromic artistic garment material according to claim 1, wherein the silver solid content in the silver nanowire solution in the step (1) is 10-15 wt.%, the average wire length of the silver nanowire is 30-50 μm, and the average wire diameter is 10-20 nm;

the time of each soaking in the step (1) is 12-36 min; the soaking is repeated for 3 to 5 times.

4. The preparation method of the electrochromic artistic garment material as claimed in claim 1, wherein the screen-printed mesh size in the step (3) is 300-500 meshes.

5. The preparation method of the electrochromic artistic garment material as claimed in claim 1, wherein the material of the cloth material in the step (1) is at least one of cotton, hemp, nylon and nylon, and the density of the cloth material is 150-400 g/m ² 。

6. The preparation method of the electrochromic artistic garment material as claimed in claim 1, wherein the soaking in the step (1) is performed in ultrasonic oscillation, and the power of the ultrasonic wave is 200-350W;

before silk-screen printing, the electrochromic dye emulsion in the step (3) needs to be uniformly dispersed by ultrasonic oscillation, the ultrasonic oscillation time is 10-30 min, and the oscillation power is 60-120W;

and (4) in the electrochromic artistic clothing fabric in the step (3), the cloth and the electrochromic printing and dyeing layer are respectively led out by using metal wires and connected with a peripheral driving circuit, so that electrochromic can be realized.

7. An electrochromic artistic garment fabric produced by the method of any one of claims 1 to 6.

8. Use of an electrochromic artistic garment fabric according to claim 7 in the field of artistic garments, stage curtains.

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