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Preparation method of graphene hybrid membrane with high conductivity and continuous interior

A high-conductivity, hybrid film technology, applied in graphene, equipment for manufacturing conductive/semiconducting layers, cable/conductor manufacturing, etc., can solve the large time cost, limitation, heating and cooling of high-temperature furnaces for graphene film preparation The problem of limited rate, etc., can solve the limitation of the size of the hybrid membrane, reduce the time cost, and achieve the effect of fast heating and cooling rate.

Active Publication Date: 2021-03-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when performing high-temperature thermal reduction, the size of the graphene film is often limited by the size of the furnace chamber, and the heating and cooling rate of the traditional high-temperature furnace is limited, and the preparation of the graphene film requires a lot of time and cost.

Method used

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  • Preparation method of graphene hybrid membrane with high conductivity and continuous interior
  • Preparation method of graphene hybrid membrane with high conductivity and continuous interior
  • Preparation method of graphene hybrid membrane with high conductivity and continuous interior

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Experimental program
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Embodiment 1

[0034] Embodiment 1, a method for preparing a highly conductive and internally continuous graphene hybrid film, comprising the following steps:

[0035] (1) Measure 10ml of graphene oxide solution (8mg / ml) and 1ml of silver nitrate solution (0.1mol / L) and mix them at a volume ratio of 10:1. When mixing, slowly add the silver nitrate solution drop by drop and stir magnetically in the graphene oxide solution, and then continue magnetic stirring for 1 h; continue to place the uniformly mixed solution in an ultrasonic bath for 30 min to perform one-step dispersion; due to the large amount of oxygen-containing functional groups on the surface of graphene oxide, graphene oxide is negatively charged, silver The ions are evenly loaded on the surface and edge of the graphene oxide sheet through strong electrostatic interaction; firstly, the dispersed graphene oxide / silver nitrate mixed solution 1 is poured into the vacuum filtration device 2, and the filter paper is 50mm in diameter and...

Embodiment 2

[0039] Embodiment 2, a method for preparing a highly conductive and internally continuous graphene hybrid film, comprising the following steps:

[0040] (1) Measure 8ml of graphene oxide solution (8mg / ml) and 1ml of ferric chloride solution (0.1mol / L) to mix by volume ratio 8:1, add ferric chloride solution drop by drop slowly while mixing Magnetically stirred graphene oxide solution, then continue to magnetically stir for 1 hour; continue to place the uniformly mixed solution in an ultrasonic bath for 30 minutes for one-step dispersion; due to the large number of oxygen-containing functional groups on the surface of graphene oxide, graphene oxide is negatively charged , iron ions are evenly loaded on the surface and edge of the graphene oxide sheet through strong electrostatic action; the mixed solution after dispersion is poured into a vacuum filtration device, and the filter paper is cellulose acetate filter paper with a diameter of 50mm and a pore size of 0.22um. The vacuu...

Embodiment 3

[0044] Embodiment 3, a kind of highly conductive and internal continuous graphene hybrid film preparation method, comprises the following steps:

[0045] (1) Measure 10ml of graphene oxide solution (8mg / ml) and 1ml of silver nitrate solution (0.1mol / L) and mix them at a volume ratio of 10:1. When mixing, slowly add the silver nitrate solution drop by drop and stir magnetically in the graphene oxide solution, and then continue magnetic stirring for 1 h; continue to place the uniformly mixed solution in an ultrasonic bath for 30 min to perform one-step dispersion; due to the large amount of oxygen-containing functional groups on the surface of graphene oxide, graphene oxide is negatively charged, silver The ions are evenly loaded on the surface and edge of the graphene oxide sheet through strong electrostatic interaction; firstly, the dispersed mixed solution is poured into a vacuum filtration device, and the filter paper is cellulose acetate filter paper with a diameter of 50mm ...

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Abstract

The invention relates to a preparation method of a graphene hybrid membrane with high conductivity and continuous interior, which comprises the following steps: hybridizing graphene oxide and metal nanoparticles, and wrapping and crosslinking adjacent graphene oxide sheets through the metal nanoparticles to reduce the interface resistance between the graphene oxide sheets; carrying out pre-reduction on the hybrid membrane by utilizing chemical reduction or low-temperature heat treatment, so that the hybrid membrane has conductivity; finally, carrying out thermal reduction on the hybrid membrane thermal reduction at 800 DEG C to 2000 DEG C through electric heating, wherein the conductivity of the reduced graphene hybrid membrane and the conductivity of the graphene membrane subjected to ultra-high-temperature graphitization treatment are at the same order of magnitude of 105 S / m; according to the method, the time cost is reduced, and meanwhile, the limitation of the size of the high-temperature furnace on the size of the hybrid membrane is solved.

Description

technical field [0001] The invention relates to the technical field of graphene hybrid film preparation, in particular to a method for preparing a highly conductive and internally continuous graphene hybrid film. Background technique [0002] Graphene is a SP 2 The carbon atoms connected by hybridization are closely packed into a new material with a single-layer two-dimensional honeycomb lattice structure, which has excellent electrical and thermal conductivity; while the graphene film is a macroscopic film assembled from graphene sheets layer by layer, which conducts electricity and heat With strong ability and excellent flexibility, it can be applied in the heat dissipation of a new generation of flexible devices, electromagnetic shielding in aerospace, microwave absorption, and lightning strike protection. [0003] The vast majority of graphene films are prepared from graphene oxide films as precursors through low-temperature chemical reduction or high-temperature physic...

Claims

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Application Information

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IPC IPC(8): H01B13/00C01B32/184
CPCH01B13/0026C01B32/184
Inventor 王奔朱彦松段玉岗肖鸿明越科
Owner XI AN JIAOTONG UNIV