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Graphene/copper nano wire composite film and preparation method thereof

A technology of copper nanowires and composite films, applied in metal/alloy conductors, cable/conductor manufacturing, carbon-silicon compound conductors, etc., can solve the problems of instable graphene performance, difficult transfer process, lack of simple operation, etc. Thermal and electrical conductivity, good controllability, and the effect of increasing density

Active Publication Date: 2017-02-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the graphene film is prepared by electrophoretic deposition, the area size is controlled by the electrode, and the electrophoretic deposition voltage and deposition time can be controlled to prepare graphene films of different thicknesses. The operation is simple, easy to control, low in cost, and suitable for large-scale preparation. Inconvenience in transferring the resulting film to other substrates
In the preparation process of the first type of graphene film, graphite has to undergo two processes of oxidation and reduction, and the performance of the obtained graphene is not stable enough, which has a certain impact on subsequent research.
The second type of chemical vapor deposition method can obtain large-area high-quality single-layer graphene, but the equipment requirements are high, and the obtained film often needs to be transferred to other substrates, and the transfer process is difficult.
[0005] In summary, the existing graphene composite film preparation methods lack simple operation, low cost, easy transfer from the substrate, and a method that can prepare large-area composite films.

Method used

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  • Graphene/copper nano wire composite film and preparation method thereof
  • Graphene/copper nano wire composite film and preparation method thereof
  • Graphene/copper nano wire composite film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] The preparation method of a kind of graphene / copper nanowire composite film described in the present embodiment is specifically carried out according to the following steps:

[0036] 1) Preparation of copper nanowire dispersion: 384g NaOH was dissolved in 640mL deionized water; 0.387g Cu(NO3) 2 Dissolve 3H2O in 32mL deionized water, stir magnetically for 10min; mix Cu(NO3) 2 The solution was slowly added to the NaOH solution; 165 μL of hydrazine hydrate and 2.4 ml of ethylenediamine were added to the above solution, and magnetically stirred for 5 minutes; heated in a water bath at 60°C for 4 hours; washed with deionized water by centrifugation, and the process was repeated 4 times; frozen After drying, disperse in aqueous solution to obtain copper nanowires;

[0037] Disperse copper nanowires in N-methylpyrrolidone: disperse the prepared copper nanowires in N-methylpyrrolidone, and perform ultrasonic treatment for 30 minutes at a frequency of 100KHz to obtain a copper ...

Embodiment 2

[0053] The preparation method of a kind of graphene / copper nanowire composite film described in the present embodiment is specifically carried out according to the following steps:

[0054] 1) Preparation of copper nanowire dispersion: 384g NaOH was dissolved in 640mL deionized water; 0.387g Cu(NO3) 2 Dissolve 3H2O in 32mL deionized water, stir magnetically for 5min; mix Cu(NO3) 2 The solution was slowly added to the NaOH solution; 165 μL of hydrazine hydrate and 2.4 ml of ethylenediamine were added to the above solution, and magnetically stirred for 5 minutes; heated in a water bath at 60°C for 4 hours; washed by centrifugation with deionized water, and the process was repeated 6 times; frozen After being dried, it is dispersed in an aqueous solution to obtain a copper nanowire solution;

[0055] Disperse copper nanowires in N-methylpyrrolidone: disperse the prepared copper nanowires in N-methylpyrrolidone, and perform ultrasonic treatment for 60 minutes at a frequency of 10...

Embodiment 3

[0068] The preparation method of a kind of graphene / copper nanowire composite film described in the present embodiment is specifically carried out according to the following steps:

[0069] 1) Preparation of copper nanowire dispersion: 384g NaOH was dissolved in 640mL deionized water; 0.387g Cu(NO3) 2 Dissolve 3H2O in 32mL deionized water, stir magnetically for 10min; mix Cu(NO3) 2 The solution was slowly added to the NaOH solution; 165 μL of hydrazine hydrate and 2.4 ml of ethylenediamine were added to the above solution, and magnetically stirred for 5 minutes; heated in a water bath at 60°C for 4 hours; washed with ethanol by centrifugation, and the process was repeated 5 times; after freeze-drying Disperse in an aqueous solution to obtain copper nanowires;

[0070] Disperse copper nanowires in N-methylpyrrolidone: disperse the prepared copper nanowires in N-methylpyrrolidone, and perform ultrasonic treatment at a frequency of 50KHz for 45min to obtain a copper nanowire dis...

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Abstract

The invention relates to a graphene / copper nano wire composite film and a preparation method thereof, and aims at solving the problem in molding of the graphene / copper nano wire composite film. The method comprises that a copper nano wire dispersion liquid is prepared; a graphene dispersion liquid is prepared; the copper nano wire dispersion liquid is mixed with the graphene dispersion liquid; a composite film is prepared in electro-static spray sedimentation method; and the graphene / copper nano wire composite film is obtained by hot pressing and sintering. According to the invention, large-size samples in which graphene is dispersed uniformly can be prepared, the composite film is easy to disengage from a substrate in the preparation process, and the film and method can be widely applied to industrial production.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a graphene composite film and the film. Background technique [0002] Graphene is defined as a two-dimensional honeycomb lattice structure composed of only a single layer of carbon atoms tightly packed, and each carbon atom forms covalent bonds with three adjacent carbon atoms. Although graphene is only composed of one layer of carbon atoms, its morphology can be observed by various instruments to characterize important information such as the number of layers, thickness, and degree of crystallization of graphene. Each carbon atom in graphene has one s orbital and three p orbitals, among which the s orbital and two p orbitals form chemical bonds with the surrounding three adjacent carbon atoms, which do not contribute to the conductivity of graphene, while the remaining One p orbital is hybridized with each other to form valence band and conduction band,...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01B1/04H01B1/22H01B1/24H01B13/00B05D1/04
CPCB05D1/04H01B1/026H01B1/04H01B1/22H01B1/24H01B13/00
Inventor 孙贤贤李宜彬赫晓东彭庆宇
Owner HARBIN INST OF TECH
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