Light-duty high-temperature-resistant and high-specific-surface-area polyimide conductive pulp and preparation method therefor

Abstract

The invention discloses light-duty high-temperature-resistant and high-specific-surface-area polyimide conductive pulp and a preparation method therefor, and belongs to the technical field of conductive materials. Polyimide pulp is taken as a skeleton carrier, and a surface layer of the polyimide pulp is a high-conductivity or high-thermal-conductivity metal layer. The method comprises the steps:firstly scattering the polyimide pulp in deionized water in a uniform manner; secondly adding ammonia water to the deionized water, placing the polyimide pulp in a metal saline solution after settlingout, and enabling the polyimide pulp to carry metal ions; thirdly carrying out the reduction of the metal ions in a reducing solution; finally carrying out the high-temperature thermal processing ofpolyamide acid pulp carried by metal, thereby obtaining the polyimide conductive pulp with the surface being coated with the metal layer. Through combining the advantages of the polyimide and the metal layer, the polyimide conductive pulp is resistant to high temperature, is high in conductivity, is low in density, is high in specific surface area, and is a novel high-performance organic / inorganiccomposite conductive material.

Description

technical field [0001] The invention relates to the field of high-temperature-resistant, high-conductivity and light-weight conductive fillers. Specifically, it relates to a polyimide conductive pulp with light weight, high temperature resistance and high specific surface area and a preparation method thereof, belonging to the technical field of conductive materials. Background technique [0002] Conductive fillers refer to additive materials composed of conductive materials, which are mainly added to the matrix in the form of fillers to improve the conductivity of the matrix. [0003] According to the form of the filler, the conductive filler mainly has two forms of powder and fiber at present, and forms a conductive network through its overlapping inside the matrix to realize the conduction of charges. According to the filler material, conductive fillers can be divided into metal-based, carbon-based and conductive polymers. The metal system is mainly gold, silver, copper...

AI Technical Summary

Problems solved by technology

In recent years, conductive materials with a certain specific surface area obtained by coating metal particles on the surface of non-metallic substrates have become a new research direction, such as conductive glass fibers, which can withstand high temperatures, but conductive glass fibers are brittle. , not resistant to bending, and the density is too high, close to the density of metal elements, so it cannot meet the requirements in some light-weight and high-strength application fields

Such materials often have relatively single performance, and cannot simultaneously have the properties of light weight, high temperature resistance, high specific surface area, and high electrical conductivity.

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