Preparation method for flexible and highly-conductive composite carbon fiber cloth

Abstract

The present invention relates to the field of carbon composite materials, more particularly to a preparation method for the flexible and highly-conductive composite carbon fiber cloth, wherein the pure natural cellulose cloth is adopted as a precursor to be uniformly compounded with carbon nanotubes and / or graphene through the impregnation method. In the protective atmosphere, textile fibers are carbonized through the high-temperature heat treatment, and a carbon fiber interface is strongly bonded with the composite carbon nanotubes or the composite graphene. In this way, during the carbonizing process, a strong bonding action is formed between carbon fibers, carbon nanotubes and / or grapheme, so that a coaxial carbon fiber cloth composite structure is formed. According to the invention, the structure and the performance of the composite material are regulated at different treatment temperatures, different treatment times and different compound quantities of carbon nanotubes. In this way, by means of the flexible and highly-conductive composite carbon fiber cloth, the problem that conventional carbon materials do not have the advantages of flexibility, high specific surface area and high electrical conductivity at the same time can be solved.

Description

technical field [0001] The invention relates to the field of carbon composite materials, in particular to a method for preparing a flexible and highly conductive composite structure carbon fiber cloth. Background technique [0002] Carbon fiber has been favored since its inception due to its excellent mechanical properties, good chemical stability, light weight and high strength. As a composite material reinforcement, it has been widely used in the fields of automobiles, aerospace, military and national defense. The mechanical and electrical properties of carbon fibers prepared from different precursors are significantly different, and the two-dimensional conductive network woven by carbon fibers has potential applications in many fields. Carbon nanotubes and graphene are new carbon nanomaterials discovered in recent years. Because of their unique nanostructure, theoretical and experimental studies have shown that carbon nanotubes and graphene have better physical and chemic...

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Problems solved by technology

[0003] So far, reports on flexible carbon fiber composite structures at home and abroad mainly focus on the following aspects: [Document 1, Wang HQ, Chen ZX, Liu HK, Guo, ZP. Rsc Advances 4, 110, 65074-65080 (2014)] Some researchers Cotton cloth is carbonized for lithium-sulfur batteries, but because cotton cloth is woven from strands, the carbon fibers are very dense, resulting in a small effective interface of the material, which limits the application of carbonized cotton cloth materials in composite materials

In terms of carbon fiber cloth composite structure, the current research mainly includes the following aspects, [Patent 1, the method for growing carbon nanotubes on a carbon fiber cloth substrate, (2006) CN 1868869A] The applicant announced a method using The method of catalyst, obtained the composite structure of carbon nanotube and carbon fiber cloth under high temperature; Oxide particles or carbon nanotubes, and applied to the method of flexible capacitors; because the above structures all use industrially prepared carbon fiber cloth as raw materials, the cost is high, and the process of further using catalysts to regenerate carbon nanotubes is more complicated, which is not conducive to mass production and application

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