Polyurethane cross-linked reduced graphene oxide composite conductive film and its preparation method and application

A technology of graphene composite and conductive film, which is applied in the direction of equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve metal fatigue, difficult to reach the level of application, durability Poor corrosion performance and other issues

Active Publication Date: 2021-09-10
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, common composite conductive films are mainly metal films or conductive polymer films. Although metal films have ultra-high strength and good toughness, they are heavy, have poor corrosion resistance, and are prone to metal fatigue after repeated bending. Phenomenon; Conductive polymer film has a certain strength and toughness, and also has the characteristics of light weight, but its conductivity is low, and it is often difficult to reach the level of practical application

Method used

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  • Polyurethane cross-linked reduced graphene oxide composite conductive film and its preparation method and application
  • Polyurethane cross-linked reduced graphene oxide composite conductive film and its preparation method and application
  • Polyurethane cross-linked reduced graphene oxide composite conductive film and its preparation method and application

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Embodiment 1

[0038] A polyurethane cross-linked reduced graphene oxide composite conductive film is formed by cross-linking polyurethane and reduced graphene oxide, wherein the mass fraction of polyurethane in the polyurethane cross-linked reduced graphene oxide composite conductive film is 5%.

[0039]A preparation method of the polyurethane cross-linked reduced graphene oxide composite conductive film in the above-mentioned embodiments of the present invention, comprising the following steps:

[0040] (1) Get 10mL of single-layer graphene oxide aqueous phase solution with a concentration of 13.8mg / mL (the average radial size of single-layer graphene oxide in this single-layer graphene oxide aqueous phase solution is 40 μm to 50 μm, and the single-layer ratio >95%), put it on a magnetic stirrer and stir rapidly; during the stirring process, first add 0.35ml of deionized water, stir for 10min, and then add 6.9mL of water-based polyurethane aqueous phase solution with a concentration of 1mg / ...

Embodiment 2

[0046] A polyurethane cross-linked reduced graphene oxide composite conductive film is basically the same as the polyurethane cross-linked reduced graphene oxide composite conductive film in Example 1, the only difference being: the polyurethane cross-linked reduced graphene oxide composite conductive film in Example 2 The mass fraction of polyurethane is 1%.

[0047] The preparation method of the polyurethane cross-linked reduced graphene oxide composite conductive film of embodiment 2 is basically the same as the preparation method of the polyurethane cross-linked reduced graphene oxide composite conductive film in embodiment 1, the only difference being: the preparation method of embodiment 2 The amount of the aqueous polyurethane solution in water is 1.38mL.

Embodiment 3

[0049] A polyurethane cross-linked reduced graphene oxide composite conductive film is basically the same as the polyurethane cross-linked reduced graphene oxide composite conductive film in Example 1, the only difference being: the polyurethane cross-linked reduced graphene oxide composite conductive film in Example 3 The mass fraction of polyurethane is 10%.

[0050] The preparation method of the polyurethane cross-linked reduced graphene oxide composite conductive film of embodiment 3 is basically the same as the preparation method of the polyurethane cross-linked reduced graphene oxide composite conductive film in embodiment 1, the only difference being: the preparation method of embodiment 3 The amount of the aqueous polyurethane aqueous phase solution is 13.8mL.

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Abstract

The invention discloses a polyurethane cross-linked reduced graphene oxide composite conductive film and its preparation method and application. The film is formed by cross-linking polyurethane and reduced graphene oxide, wherein the mass fraction of polyurethane is ≤20%. The preparation method includes: making a mixed solution of water-based polyurethane aqueous phase solution and graphene oxide aqueous phase solution, applying it on the substrate to form a polyurethane / graphene oxide composite film, and heating to form a polyurethane cross-linked graphene oxide composite film , dipped in a reducing agent to make the above-mentioned thin film of the present invention. The composite conductive film of the present invention has the advantages of light weight, high electrical conductivity, good corrosion resistance, ultra-high tensile strength and toughness, etc., is a new type of conductive film material, can be widely used in the preparation of flexible electronic devices, and has great advantages High use value and good application prospect. The preparation method of the invention is simple, easy to implement, low in cost, convenient and fast, simple and easy to operate, and is suitable for large-area use of special-shaped parts.

Description

technical field [0001] The invention belongs to the field of preparation of emerging materials, and relates to a composite conductive film and its preparation method and application, in particular to a polyurethane cross-linked reduced graphene oxide composite conductive film and its preparation method and application. Background technique [0002] Due to the applicability of flexible electronic devices such as self-electronic devices, aerospace, artificial intelligence, and robotic arms, conductive films with super strength and high toughness have attracted widespread attention in recent years. And studies have shown that the preparation of conductive films with light weight, super strength, and high toughness usually needs to meet three conditions: ultra-high breaking strength, high elongation at break, and low density. [0003] At present, common composite conductive films are mainly metal films or conductive polymer films. Although metal films have ultra-high strength an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B5/14H01B1/24H01B13/00
CPCH01B1/24H01B5/14H01B13/0026
Inventor 梁耕源张鉴炜安少杭白书欣鞠苏刘钧
Owner NAT UNIV OF DEFENSE TECH
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