CN104711568A - Preparation method and device for wrapping metal wires with carbon nanomaterials - Google Patents

Abstract

The invention discloses a preparation method and device for wrapping carbon nanomaterials on metal wires. In the method, the metal wires are neatly arranged and bundled together to form capillaries, and then dipped into a suspension containing carbon nanomaterials, taken out Then it is dried by evaporation, and this operation can be repeated, and then the metal wires bundled together can be separated to obtain the metal wires wrapped by carbon nanomaterials. Dip the neatly arranged and bundled metal wires wrapped by carbon nanotubes into the graphene suspension, and then separate the bundled metal wires to obtain carbon nanotubes and graphene-wrapped wires in sequence . The metal wires are neatly arranged and bundled together and impregnated into the mixed suspension of carbon nanotubes and graphene, then evaporated and dried, and repeated several times, and then the bundled metal wires are separated to obtain carbon nanotubes and graphene. Graphene composite wrapped wire. The method is extremely simple and easy for industrial production, and has extremely broad application prospects in the fields of electromagnetic shielding, conductive cables, flexible electronic devices, smart textiles, solar devices, energy storage batteries, and linear supercapacitors.

Description

A preparation method and device for wrapping carbon nanomaterials on metal wires

technical field

The invention relates to a metal wire coating technology, in particular to a preparation method and a device for wrapping carbon nanomaterials on a metal wire.

Background technique

With their unique crystal structure, carbon nanotubes and graphene have properties such as high carrier mobility, large specific surface area, metal or semiconducting properties, quantum Hall effect, high mechanical strength and elasticity, and these excellent properties make it It has a wide range of applications in various fields, such as field emission, sensors, electrochemistry, and catalysts for fuel cells. Although carbon nanotubes and graphene have outstanding nanostructure properties, they still face outstanding problems such as difficult processing, high processing costs, and difficulty in maintaining performance when used as coatings. Especially when wrapping metal wires, the traditional spraying process causes a lot of raw material loss and low production efficiency. For this reason, a number of research units have carried out research on wrapping carbon nanotubes and graphene on metal wires. For example: In 2012, the Shanghai Institute of Ceramics, Chinese Academy of Sciences used metal wires or metal wires as catalyst templates to make carbon sources directly generate graphene coatings on the outer surfaces of the metal wires through chemical vapor deposition. Graphene/ Metal wire or metal wire composite structure (publication number: CN102560415A). This method needs to be carried out at a high temperature above 700°C. The catalytic growth of graphene requires the type of metal wire, and the thickness of the graphene layer is affected by the growth mechanism and cannot be adjusted in a wide range. In 2012, Jinan University developed a method of preparing layer-by-layer self-assembled graphene-coated solid-phase microextraction fibers on a metal wire carrier. The metal wire is used as a carrier, and the surface is electroless silver-plated, and then the layer-by-layer self-assembly method is adopted. Using gold nanoparticles as connecting arms, thiol-functionalized graphene is self-assembled layer by layer on silver-coated wires (publication number: CN102553553A). This method needs to be connected with other nanoparticles or organic molecules, and the steps are complicated; and the graphene layers are separated, which weakens the interlayer force. The research group of Tsinghua University used electrochemical deposition to deposit graphene on metal wires for supercapacitor electrodes (Chemical Communications, 2013, 49, 291). Electrochemical deposition consumes a lot of energy, and the deposited graphene is non-layered and stacked, and its adhesion is poor. In addition, while preparing carbon nanotubes and graphene fibers, carbon nanotubes and graphene can be wrapped on metal wires by twisting (Nature communications, 2014, 4:1970; ACS Nano, 2014, 8, 4571) . However, the preparation process of this method is complicated, and it is difficult to achieve large length and mass production. And the present invention can well solve the above problems.

Contents of the invention

The purpose of the present invention is to provide a new method of wrapping carbon nanomaterials on metal wires. The method is based on the capillary principle and added evaporation and drying. The prepared metal wires wrapped by carbon nanomaterials can be used in electromagnetic shielding, conductive cables, flexible electronic devices , smart textiles, solar devices, energy storage batteries, linear supercapacitors and other fields have broad application prospects.

The present invention is achieved through the following technical solutions: clean the surface of the metal wire; wind a single metal wire on the axis or arrange two or more metal wires neatly and bind them together; Dip the metal wire into the mixture suspension containing the carbon nanomaterial; dry by evaporation; repeat the above operation; separate the bundled metal wire or untie the metal wire on the axis to obtain the carbon nanomaterial-wrapped metal wire.

The metal wires used are solid single metal wires or alloy wires at room temperature, and the metal wires used to prepare carbon nanomaterials include gold wires, silver wires, copper wires, iron wires, nickel wires, cobalt wires, aluminum wires, zinc wires, and magnesium wires. Wire, titanium wire, bismuth wire, chromium wire, manganese wire, tantalum wire, tungsten wire, molybdenum wire, platinum wire, rhodium wire, ruthenium wire, palladium wire, rhenium wire or iridium wire or their alloy wires.

Carbon nanomaterials used to prepare metal wires include single-walled carbon nanotubes, few-walled carbon nanotubes, multi-walled carbon nanotubes, graphene oxide, reduced graphene oxide, graphene or graphite nanosheets or mixtures thereof.

The suspensions used include carbon nanomaterials, solvents, dispersants and binders. Among them, the solvent includes water, methanol, ethanol, isopropanol, ethylene glycol, methyl ether, ether, methyl ethyl ether, acetone, methyl ethyl ketone, methyl ethyl ketone, chloroform, carbon tetrachloride, benzene, toluene, tetrahydrofuran, dimethyl formaldehyde Amides, Dimethyl Sulfoxide, Acetic Acid, Methyl Formate and mixtures thereof; Dispersants include: Sodium Lauryl Sulfate, Cetyltrimethylammonium Bromide, Polyvinyl Alcohol, Polyethylene Glycol, Polyethylene Base pyrrolidone, span 80, Triton X-100; binders include: cellulose, chitosan, Nafion, epoxy resin, phenolic resin, polyamino acid methyl ester.

Metal wires are successively dipped into suspensions containing different carbon nanomaterials, and after dipping and drying, the metal wires are separated to obtain metal wires wrapped with different carbon nanomaterials.

The present invention also provides a device for wrapping carbon nanomaterials on metal wires, which device includes: stainless steel metal rod (1), stainless steel disc (2), loading platform (3), cavity (4), motor (5), wire (6), shaft (10), speed control system (7) including speed display screen (8) and speed control button (9); stainless steel rod (1) is vertically fixed on stainless steel disc (2) Above, the shaft (10) of the stainless steel disc (2) is connected to the motor (5), the speed control system (7) is connected to the motor (5) through a wire (6), and the shaft (10) of the stainless steel disc (2) is vertical Located in the cavity (4) and can move axially along the cavity (4), the loading platform (3) is perpendicular to the cavity (4), and the suspension containing carbon nanomaterials is placed on the loading platform (3).

Beneficial effect:

1. The method for preparing metal wire provided by the present invention utilizes the capillary principle and can be carried out at room temperature. Compared with methods such as chemical deposition, it is simple, fast, safe and easy to produce.

2. The invented carbon nanomaterial-wrapped metal wire has excellent electrical conductivity, good mechanical properties and corrosion resistance. It can be used in electromagnetic shielding, conductive cables, flexible electronic devices, smart textiles, solar devices, energy storage batteries, Linear supercapacitors and other fields have broad application prospects.

3. The present invention uses the capillary principle to assemble carbon nanomaterials on metal wires and evaporates and dries, which can be carried out at room temperature. It is safe and the assembly time is extremely short. It is convenient and quick to operate, low in cost, and conducive to large-scale production. Compared with the layer-by-layer self-assembled graphene-coated solid-phase microextraction fiber method, it is much simpler and faster, and has no influence of impurities.

Description of drawings

Fig. 1 is the structural representation of device of the present invention;

Identification instructions: 1-stainless steel metal rod; 2-stainless steel disc; 3-loading platform; 4-cavity; 5-motor; 6-wire; 7-speed control system; 8-speed display; 9-speed control button; 10-axis.

Figure 2 is a scanning electron microscope image of pristine Ni wire.

Figure 3 is a scanning electron microscope image of the assembled graphene oxide Ni wire.

Detailed ways

The present invention relates to a preparation method for wrapping carbon nanomaterials on metal wires. The carbon nanomaterials in the embodiments of the present invention take carbon nanotubes and graphene as examples. Clean the surface of the metal wires, arrange them neatly and bundle them together. The extra-long wires can be bundled by means of coils, wound on the stainless steel metal rods of the experimental device, and then dipped into the carbon nanotube suspension to adjust the speed Make it rotate at a constant speed in the carbon nanotube suspension, evaporate and dry, and repeat it several times, and then separate the neatly arranged and bundled metal wires to obtain the carbon nanotube-wrapped metal wires. Or wind the bundled carbon nanotube-wrapped metal wire on the stainless steel metal rod of the experimental device, dip it into the graphene suspension, adjust the rotation speed to make it rotate at a constant speed in the graphene suspension, and then dry it by evaporation, and It can be repeated many times, and then the neatly arranged and bundled metal wires are separated to obtain the metal wires wrapped by carbon nanotubes and graphene in sequence. Or clean the surface of the metal wires, arrange them neatly and bundle them together and wind them on the stainless steel metal rods of the experimental device, and then dip them into the mixture suspension of carbon nanotubes and graphene. Rotate at a constant speed in the olefin mixture suspension, then evaporate and dry, and repeat it many times, and then separate the neatly arranged and bundled metal wires to obtain the metal wires wrapped by the mixture of carbon nanotubes and graphene. Metal wires used include but not limited to gold wire, silver wire, copper wire, iron wire, nickel wire, cobalt wire, aluminum wire, zinc wire, magnesium wire, titanium wire, bismuth wire, chromium wire, manganese wire, tantalum wire, tungsten wire Wire, molybdenum wire, platinum wire, rhodium wire, ruthenium wire, palladium wire, rhenium wire or iridium wire or their alloy wires; carbon nanomaterials used include but are not limited to: single-walled carbon nanotubes, few-walled carbon nanotubes , multi-walled carbon nanotubes, graphene oxide, reduced graphene oxide, graphene, graphite nanoplatelets and mixtures thereof.

The preparation method is as follows:

(1) Select N (N>1, and an integer) segments of equal length gold wire, silver wire, copper wire, iron wire, nickel wire, cobalt wire, aluminum wire, zinc wire, magnesium wire, titanium wire, bismuth wire, chrome wire , manganese wire, tantalum wire, tungsten wire, molybdenum wire, platinum wire, rhodium wire, ruthenium wire, palladium wire, rhenium wire or iridium wire or their alloy wire titanium, bismuth, chromium, manganese, tantalum, tungsten, molybdenum, platinum , rhodium, ruthenium, palladium, rhenium, iridium and their alloy wires.

(2) Clean the selected metal wires and bundle them neatly together, then dip them into the carbon nanotube suspension, take them out and dry them in the air or dry them, and repeat them several times to prepare carbon nanotube-wrapped metal wires .

(3) The carbon nanotube suspension includes carbon nanotubes, a solvent, a dispersant and a binder.

(4) Metal wires include but are not limited to gold wires, silver wires, copper wires, iron wires, nickel wires, cobalt wires, aluminum wires, zinc wires, magnesium wires, titanium wires, bismuth wires, chromium wires, manganese wires, tantalum wires, Tungsten wire, molybdenum wire, platinum wire, rhodium wire, ruthenium wire, palladium wire, rhenium wire or iridium wire or their alloy wires, titanium, bismuth, chromium, manganese, tantalum, tungsten, molybdenum, platinum, rhodium, ruthenium, palladium , Rhenium, iridium and their alloy wires.

(5) Solvents include water, methanol, ethanol, isopropanol, ethylene glycol, methyl ether, ether, methyl ethyl ether, acetone, methyl ethyl ketone, methyl ethyl ketone, chloroform, carbon tetrachloride, benzene, toluene, tetrahydrofuran, dimethyl Formamide, Dimethyl Sulfoxide, Acetic Acid, Methyl Formate and mixtures thereof.

(6) Dispersants include sodium lauryl sulfate, cetyltrimethylammonium bromide, polyvinyl alcohol, polyethylene glycol, polyvinylpyrrolidone, span 80, and Triton X-100.

(7) Binders include cellulose, chitosan, Nafion, epoxy resin, phenolic resin, polyamino acid methyl ester.

(8) Immerse the metal wire wrapped by carbon nanotubes neatly arranged and bundled together into the graphene suspension, take it out and dry or dry it, and repeat it many times to prepare carbon nanotubes and graphene in sequence. Wrapped wire.

(9) The carbon nanotube or graphene suspension comprises carbon nanotube or graphene, a solvent (same as step 5), a dispersant (same as step 6) and a binding agent (same as step 7).

(10) The metal wire wrapped by the metal nanowire prepared in step 2 is operated according to step 8 to obtain the metal wire wrapped by carbon nanotubes and graphene in sequence.

(11) Immerse the neatly arranged and bundled metal wires into the mixed suspension of carbon nanotubes and graphene, take it out and dry or dry it, and repeat it many times to prepare carbon nanotubes and graphene mixed-wrapped Conductive wire.

Carbon nanomaterials include, but are not limited to, single-walled carbon nanotubes, few-walled carbon nanotubes, multi-walled carbon nanotubes, graphene oxide, reduced graphene oxide, graphene, graphite nanosheets and mixtures thereof, the above preparation method and the following The carbon nanomaterials in the embodiments adopt carbon nanotubes and graphene.

Example 1

(1) Select N (N>2, and it is an integer) copper wires of equal length, clean them, arrange the selected wires neatly and bundle them together, and wind them at the corresponding positions of the experimental device.

(2) Add 0.02-0.5 grams of single-walled carbon nanotubes to the mixed suspension of water and isopropanol with a volume ratio of 0.1-10, and then add 0.001-0.1 grams of sodium lauryl sulfate and 0.0001-0.001 grams of fiber Suspensions of single-walled carbon nanotubes.

(3) Immerse the wound copper wire into the single-wall carbon nanotube suspension, adjust the rotating speed to make it rotate at a uniform speed in the single-wall carbon nanotube suspension, then take it out and dry it at 1-200 ° C. This process can The process is carried out several times, and then the neatly arranged and bundled metal wires are separated to prepare highly conductive single-walled carbon nanotube-wrapped copper wires.

Example 2

(1) Select a section of bundled single-walled carbon nanotube-wrapped copper wire in Example 1, and wind it at the corresponding position of the experimental device.

(2) 0.02-0.5 gram of graphene is added to the mixed suspension of water and isopropanol with a volume ratio of 0.1-10, and then 0.001-0.1 gram of sodium lauryl sulfate and 0.0001-0.001 gram of cellulose are added to prepare into a graphene suspension.

(3) Place the copper wire wrapped by the wound single-walled carbon nanotubes in the graphene suspension, adjust the rotating speed to make it rotate at a constant speed in the graphene suspension, take it out and dry it at 1-200 ° C, this process It can be carried out multiple times, and then the neatly arranged and bundled metal wires are separated to prepare copper wires wrapped with single-walled carbon nanotubes and graphene in sequence.

Example 3

(1) Select N (N>2, and it is an integer) sections of nickel metal wires of equal length to clean, arrange the metal wires neatly and bundle them together, and wind them at the corresponding positions of the experimental device.

(2) Add 0.02-0.5 g of single-walled carbon nanotubes to the tetrahydrofuran suspension, and then add 0.001-0.1 g of polyvinyl alcohol and 0.0001-0.001 g of epoxy resin to prepare the single-walled carbon nanotubes suspension.

(3) Immerse the wound nickel wire into the single-wall carbon nanotube suspension, adjust the rotating speed to make it rotate at a constant speed in the single-wall carbon nanotube suspension, and then take it out and dry it at 1-200 ° C. This process It can be carried out many times, and then the neatly arranged and bundled nickel metal wires are separated to prepare highly conductive nickel metal wires wrapped by single-walled carbon nanotubes.

Example 4

(1) Select a section of nickel wire wrapped with single-walled carbon nanotubes bundled together in Example 3, and wrap it around the corresponding position of the experimental device.

(2) 0.02-0.5 gram of graphene is added to the mixed suspension of water and isopropanol with a volume ratio of 0.1-10, then 0.001-0.1 gram of sodium lauryl sulfate and 0.0001-0.001 gram of chitosan are added, Make a graphene suspension.

(3) Place the nickel wire wrapped by the wound single-walled carbon nanotubes in the graphene suspension, adjust the rotating speed to make it rotate at a uniform speed in the graphene suspension, then take it out and dry it at 1-200°C, then The process can be carried out several times, and then the bundled nickel metal wires are separated to prepare nickel metal wires wrapped by carbon nanotubes and graphene in sequence.

Example 5

(1) Select N (N>2, and it is an integer) segments of gold metal wires of equal length, clean them, arrange the selected metal wires neatly and bundle them together, and wind them at the corresponding positions of the experimental device.

(2) Add 0.02-0.5 grams of single-walled carbon nanotubes to the mixed suspension of water and isopropanol with a volume ratio of 0.1-10, and then add 0.001-0.1 grams of sodium lauryl sulfate and 0.0001-0.001 grams of Nafion , to make a suspension of single-walled carbon nanotubes.

(3) Immerse the wound gold wire into the single-walled carbon nanotube suspension, adjust the rotating speed to make it rotate at a constant speed in the single-walled carbon nanotube suspension, and then take it out and dry it at 1-200 ° C. This process This can be done multiple times and the bundled wires are separated to produce highly conductive single-walled carbon nanotube-wrapped gold wires.

Example 6

(1) Select a piece of gold wire wrapped with single-walled carbon nanotubes neatly bundled together in Example 5, and wrap it around the corresponding position of the experimental device.

(2) 0.02-0.5 gram of graphene is added to the mixed suspension of water and isopropanol with a volume ratio of 0.1-10, then 0.001-0.1 gram of sodium lauryl sulfate and 0.0001-0.001 gram of epoxy resin are added, Make a graphene suspension.

(3) place the gold wire wrapped by the wound single-walled carbon nanotubes in the graphene suspension, adjust the rotating speed to make it rotate at a constant speed in the graphene suspension, then take it out and dry it at 1-200°C. The process can be carried out several times, and the bundled gold wires are separated to prepare single-walled carbon nanotubes and graphene-wrapped gold wires in sequence.

Example 7

(1) Select N (N>2, and it is an integer) segments of silver metal wires of equal length, clean them, arrange the selected metal wires neatly and bundle them together, and wind them at the corresponding positions of the experimental device.

(2) Add 0.02-0.5 grams of double-walled carbon nanotubes to a mixed suspension of water and ethanol with a volume ratio of 0.1-10, then add 0.001-0.1 grams of cetyltrimethylammonium bromide and 0.0001-0.001 grams of phenolic resin to make a suspension of double-walled carbon nanotubes. (3) Immerse the wound silver wire into the suspension of double-walled carbon nanotubes, adjust the rotating speed to make it rotate at a constant speed in the suspension of double-walled carbon nanotubes, and then take it out and dry it at 1-200°C. This can be done multiple times and the bundled wires are separated to produce highly conductive double-walled carbon nanotube-wrapped silver wires.

Example 8

(1) Select a piece of silver wire wrapped by double-walled carbon nanotubes neatly arranged and bundled together in Example 7, and wind it at the corresponding position of the experimental device.

(2) 0.02-0.5 gram of graphene nanosheets are added to the mixed suspension of water and ethylene glycol with a volume ratio of 0.1-10, and then 0.001-0.1 gram of polyvinyl alcohol and 0.0001-0.001 gram of polyamino acid methyl ester are added to prepare into a suspension of graphene nanosheets.

(3) Place the silver wire wrapped by the wrapped double-walled carbon nanotubes in the graphene nanosheet suspension, control the rotating speed to make it rotate at a constant speed in the graphene nanosheet suspension, and then take it out at 1-200°C Drying, this process can be carried out many times, and then the bundled metal wires are separated to prepare silver wires wrapped by double-walled carbon nanotubes and graphene nanosheets in sequence.

Example 9

(1) Select N (N>2, and it is an integer) segments of aluminum metal wires of equal length, clean them, arrange the selected metal wires neatly and bundle them together, and wind them at the corresponding positions of the experimental device.

(2) Add 0.02-0.5 grams of multi-walled carbon nanotubes to a mixed suspension of water and ethanol with a volume ratio of 0.1-10, and then add 0.001-0.1 grams of polyvinylpyrrolidone and 0.0001-0.001 grams of cellulose to prepare Suspensions of multi-walled carbon nanotubes.

(3) Immerse the wound aluminum wire into the multi-walled carbon nanotube suspension, adjust the rotating speed to make it rotate at a constant speed in the multi-walled carbon nanotube suspension, and then take it out and dry it at 1-200°C. It can be carried out several times, and then the bundled metal wires are separated to prepare aluminum wires wrapped with highly conductive multi-walled carbon nanotubes.

Example 10

(1) Select a section of aluminum wire wrapped with multi-walled carbon nanotubes bundled together in Example 9, and wind it on the corresponding position of the experimental device.

(2) Add 0.02-0.5 grams of reduced graphene oxide to the mixed suspension of water and ethylene glycol with a volume ratio of 0.1-10, and then add 0.001-0.1 grams of sodium lauryl sulfate and 0.0001-0.001 grams of chitosan Sugar, made into reduced graphene oxide suspension.

(3) Place the aluminum wire wrapped by the wound multi-walled carbon nanotubes in the reduced graphene oxide suspension, adjust the rotation speed to make it rotate at a constant speed in the reduced graphene oxide suspension, and then take it out at 1-200 ° C Drying, this process can be carried out many times, and then the bundled metal wires are separated to prepare aluminum wires wrapped in multi-walled carbon nanotubes and reduced graphene oxide in sequence.

Example 11

(1) Select N (N>2, and it is an integer) copper wires of equal length, clean them, arrange the selected copper wires neatly and bundle them together, and wind them on the corresponding positions of the experimental device.

(2) Add 0.02-0.5 grams of multi-walled carbon nanotubes to the mixed suspension of water and dimethyl sulfoxide with a volume ratio of 0.1-10, then add 0.001-0.1 grams of sodium lauryl sulfate and 0.0001-0.001 gram of chitosan to make a suspension of multi-walled carbon nanotubes.

(3) Immerse the wound copper wire into the multi-wall carbon nanotube suspension, adjust the rotating speed to make it rotate at a constant speed in the multi-wall carbon nanotube suspension, then take it out and dry it at 1-200 ° C. This process can Repeatedly, a highly conductive multi-walled carbon nanotube-wrapped copper wire is prepared.

Example 12

(1) Select a section of copper wire wrapped with multi-walled carbon nanotubes bundled together in Example 11, and wind it at the corresponding position of the experimental device.

(2) Add 0.02-0.5 grams of graphene nanosheets to the mixed suspension of water and methyl ether with a volume ratio of 0.1-10, then add 0.001-0.1 grams of cetyltrimethylammonium bromide and 0.0001-0.001 Gram Nafion, made of graphene nanosheet suspension.

(3) Place the copper wire wrapped by the wrapped multi-walled carbon nanotubes in the graphene nanosheet suspension, adjust the rotating speed to make it rotate at a uniform speed in the graphene nanosheet suspension, then take it out and bake it at 1-200°C Dry, this process can be carried out many times, and then the bundled metal wires are separated to prepare copper wires wrapped by multi-walled carbon nanotubes and graphene nanosheets in sequence.

Example 13

(1) Select N (N>2, and an integer) copper wires of equal length, clean them, and wind them at the corresponding positions of the experimental device.

(2) 0.02-0.5 gram of less-walled carbon nanotubes is added to a mixed suspension of water and methyl ethyl ether with a volume ratio of 0.1-10, and then 0.001-0.1 gram of cetyltrimethylammonium bromide and 0.0001- 0.001 g of epoxy resin to make a suspension of few-walled carbon nanotubes.

(3) Immerse the wound copper wire into the suspension of few-walled carbon nanotubes, adjust the rotating speed to make it in the suspension of few-walled carbon nanotubes, then take it out and dry it at 1-200°C. This process can be carried out Repeatedly, the bundled metal wires were separated to prepare copper wires wrapped with highly conductive few-walled carbon nanotubes.

Example 14

(1) Select a section of bundled copper wire wrapped with few-walled carbon nanotubes in Example 13, and wrap it around the corresponding position of the experimental device.

(2) Add 0.02-0.5 gram of graphene oxide to the mixed suspension of water and methyl ether with a volume ratio of 0.1-10, then add 0.001-0.1 gram of polyvinyl alcohol and 0.0001-0.001 gram of phenolic resin to make graphene oxide suspension.

(3) Place the copper wire wrapped by the wound few-walled carbon nanotubes in the graphene oxide suspension, adjust the device to make it rotate at a constant speed in the graphene oxide suspension, and then take it out and dry it at 1-200°C , this process can be carried out many times, and the bundled metal wires are separated to prepare copper wires wrapped with few-walled carbon nanotubes and graphene oxide in sequence.

Example 15

(1) Select N (N>2, and it is an integer) segments of nickel metal wires of equal length, clean them, and wind them at the corresponding positions of the experimental device.

(2) Add 0.02-0.5 grams of multi-walled carbon nanotubes to the mixed suspension of water and toluene with a volume ratio of 0.1-10, and then add 0.001-0.1 grams of polyvinyl alcohol and 0.0001-0.001 grams of polyamino acid methyl ester to prepare Suspensions of multi-walled carbon nanotubes.

(3) Immerse the wound nickel metal wire into the suspension of multi-walled carbon nanotubes, adjust the rotating speed to make it rotate at a constant speed in the suspension of multi-walled carbon nanotubes, then take it out and dry it at 1-200°C. It can be carried out several times to separate the bundled metal wires to prepare nickel metal wires wrapped by highly conductive multi-walled carbon nanotubes.

Example 16

(1) Select a section of nickel wire wrapped by bundled multi-walled carbon nanotubes in Example 15, and wrap it around the corresponding position of the experimental device.

(2) Add 0.02-0.5 grams of graphene oxide to the mixed suspension of water and ethanol with a volume ratio of 0.1-10, then add 0.001-0.1 grams of polyvinyl alcohol and 0.0001-0.001 grams of span 80 to make graphene oxide suspension liquid.

(3) Place the nickel metal wire wrapped by the wound multi-wall carbon nanotubes in the graphene oxide suspension, adjust the rotating speed to make it rotate at a constant speed in the graphene oxide suspension, then take it out and bake it at 1-200°C Dry, this process can be carried out many times, the bundled metal wires are separated, and the metal wires wrapped by multi-walled carbon nanotubes and graphene oxide are prepared in sequence.

Example 17

(1) Select N (N>2, and it is an integer) sections of copper-nickel alloy wires of equal length, clean them, arrange the selected copper-nickel alloy wires neatly and bundle them together, and wind them at the corresponding positions of the experimental device .

(2) 0.02-0.5 grams of single-walled carbon nanotubes are added to a mixed suspension of water and chloroform with a volume ratio of 0.1-10, and then 0.001-0.1 grams of polyethylene glycol and 0.0001-0.001 grams of cellulose are added to form a single-walled carbon nanotube. Walled carbon nanotube suspensions.

(3) Immerse the wound copper-nickel alloy wire into the single-wall carbon nanotube suspension, adjust the rotating speed to make it rotate at a constant speed in the single-wall carbon nanotube suspension, then take it out and dry it at 1-200°C , this process can be carried out many times, and the bundled metal wires are separated to prepare highly conductive single-walled carbon nanotube-wrapped copper-nickel alloy wires.

Example 18

(1) Select a section of copper-nickel alloy wire wrapped with single-walled carbon nanotubes bundled together in Example 17, and wind it at the corresponding position of the experimental device.

(2) Add 0.02-0.5 gram of graphene oxide to the mixed suspension of water and ethanol with a volume ratio of 0.1-10, then add 0.001-0.1 gram of polyvinyl alcohol and 0.0001-0.001 gram of chitosan to make graphene oxide suspension.

(3) Place the copper-nickel alloy wire wrapped by single-walled carbon nanotubes in the graphene oxide suspension, adjust the rotation speed to make it rotate at a constant speed in the graphene oxide suspension, and then take it out at 1-200 ° C Drying, this process can be carried out many times to prepare copper-nickel alloy wires wrapped by single-walled carbon nanotubes and graphene oxide in sequence.

Although the number of metal wires mentioned in the implementation method is N (N>1, and an integer), the number of metal wires in a specific embodiment is (N>2, and an integer), starting from the principle of the present invention , using the capillary principle to assemble nano-layers, the number of metals can also be 1, that is, a metal wire will be wound on one axis, as long as there is a gap between adjacent metal wire coils, it can also pass through the carbon nanomaterials Rotate at a constant speed to form carbon nanomaterial-coated metal wires.

Multiple metal wires are bundled side by side or a single metal wire is bundled into a coil shape, dipped into the corresponding dispersion liquid, and the suspension can enter the capillary between the wires in a very short time. Through experiments, we found that the dipping time is several The purpose of assembling carbon nanomaterials on metal wires can be achieved in minutes, hours, days, etc., so the impregnation is not as long as possible. For the suspension with poor dispersion, the impregnation time is a few minutes. Avoid solutes in the suspension being deposited on the wire due to gravity.

The purpose of assembling carbon nanomaterials on metal wires can be achieved at any concentration of the suspension. Generally speaking, the lower the concentration, the more dipping times or the higher the concentration, the less dipping times can achieve the assembly of a certain thickness. If you just want to assemble carbon nanotubes or graphene on the wire, there are no strict requirements. If you want to get If the assembly effect is relatively uniform, it is generally assembled with a low concentration. Or in other words, as long as the carbon nanotubes or graphene or other materials in the suspension can enter the capillaries between the wires, the materials can be assembled on the wires through evaporation.

As for the result of assembling carbon nanomaterials on the surface of the metal wire, it can usually be judged based on the macroscopic observation of the surface color of the metal wire. If you want to assemble a thicker layer, you can dip it dozens of times or more. For those with a large color difference between the material and the metal wire, for example, the carbon nanotube is black and the nickel wire is gray, after dipping, it is obvious that the surface of the gray nickel wire turns into the color of the black carbon nanotube. Figure 2 provides a scanning electron microscope picture of the nickel wire matrix material, and Figure 3 is a scanning electron microscope picture of the nickel wire assembled with carbon nanomaterials.

Claims (10)

1. a preparation method of wrapping carbon nanomaterial on a metal wire, it is characterized in that, the preparation method comprises the steps: Clean the wire surface; Wind a single metal wire on the axis or arrange two or more metal wires neatly and bundle them together; Dip neatly aligned or coiled wires into a suspension containing carbon nanomaterials; drying by evaporation; Repeat the above operation; Separate the bundled metal wires or untie the wires on the axis to obtain the carbon nanomaterial-wrapped wires. 2. The preparation method according to claim 1, characterized in that: the metal wire is a normal temperature solid element metal wire or an alloy metal wire. 3. The preparation method according to claim 2, characterized in that: the metal wire comprises gold wire, silver wire, copper wire, iron wire, nickel wire, cobalt wire, aluminum wire, zinc wire, magnesium wire, titanium wire , Bismuth wire, chromium wire, manganese wire, tantalum wire, tungsten wire, molybdenum wire, platinum wire, rhodium wire, ruthenium wire, palladium wire, rhenium wire or iridium wire or their alloy wires. 4. The preparation method according to claim 1, characterized in that: the carbon nanomaterials include: single-walled carbon nanotubes, few-walled carbon nanotubes, multi-walled carbon nanotubes, graphene oxide, reduced graphene oxide , graphene or graphite nanosheets or mixtures thereof. 5. The preparation method according to claim 1, characterized in that: the suspension comprises carbon nanomaterials, a solvent, a dispersant and a binding agent. 6. The preparation method according to claim 5, characterized in that: said solvent comprises water, methanol, ethanol, isopropanol, ethylene glycol, methyl ether, ether, methyl ethyl ether, acetone, butanone, methyl ethyl ketone, Chloroform, carbon tetrachloride, benzene, toluene, tetrahydrofuran, dimethylformamide, dimethyl sulfoxide, acetic acid, methyl formate, and mixtures thereof. 7. preparation method according to claim 5, is characterized in that: described dispersant comprises sodium lauryl sulfate, cetyltrimethylammonium bromide, polyvinyl alcohol, polyethylene glycol, polyethylene glycol Vinylpyrrolidone, span 80, Triton X-100. 8. The preparation method according to claim 5, characterized in that: the binder agent comprises: cellulose, chitosan, Nafion, epoxy resin, phenolic resin, polyamino acid methyl ester. 9. The preparation method according to claims 1-8, characterized in that: the evaporation and drying step can be carried out at normal temperature, or can be heated and evaporated to dry. 10. A device for wrapping carbon nanomaterials on a wire, characterized in that the device comprises: a stainless steel metal rod (1), a stainless steel disc (2), a loading platform (3), a cavity (4), Motor (5), wire (6), shaft (10), speed control system (7) comprising speed display screen (8) and speed control button (9); stainless steel bar (1) is vertically fixed on stainless steel disc (2 ), the shaft (10) of the stainless steel disc (2) is connected to the motor (5), the speed control system (7) is connected to the motor (5) through a wire (6), and the shaft (10) of the stainless steel disc (2) It is perpendicular to the cavity (4) and can move axially along the cavity (4), the loading platform (3) is perpendicular to the cavity (4), and the suspension containing carbon nanomaterials is placed on the loading platform (3).