A kind of preparation method of thin-wall foamed carbon-carbon nanotube composite material

Abstract

The invention discloses a method for preparing a thin-wall foam carbon-carbon nanotube composite material, which is characterized by comprising the following steps of using a mould consisting of a bottom plug, an annular housing, a slidable piston disposed inside the annular housing, and a heavy object pressed against the piston; evenly mixing starch and mixed acid and extracting and filtering an obtained mixture to obtain a filter cake; placing the filter cake on the bottom plug; connecting the annular housing with the bottom plug in a sleeving manner; placing the piston on the filter cake and pressing the heavy object on the piston, and placing the same in an oven, increasing the temperature to 150 DEG C and maintaining the temperature for 1-3 h; taking out the filter cake, i.e., thin-wall foam carbon to cut into slices to be dipped in a nickel salt-containing ethanol solution, and then taking out for drying to prepare thin-wall foam carbon slices loaded with a catalyst; placing the slices into inner flame of an alcohol lamp for burning, then placing the same in a sulfuric acid solution for soaking, and washing with distilled water to be neutral and drying so as to obtain the thin-wall foam carbon-carbon nanotube composite material. The obtained composite material is securely composited, has rich hole structures, and can be widely used as an electrode material, a catalyst carrier, an electromagnetic shielding material and the like.

Description

Technical field [0001] The invention belongs to the preparation of a carbon-carbon composite material, and relates to a preparation method of a thin-walled foamed carbon-carbon nanotube composite material. The thin-walled foamed carbon-carbon nanotube composite material prepared by the invention is suitable for electrode materials, catalyst carriers, electromagnetic shielding materials and other fields. Background technique [0002] Foamed carbon material is a new type of three-dimensional sponge-like carbon material. It has the characteristics of low density, high temperature resistance, corrosion resistance, and oxidation resistance. It can be made into materials with high thermal conductivity or thermal insulation properties according to needs. The development of foamed carbon materials began in the late 1960s. Since the 1990s, the United States Air Force Scientific Research Laboratory, Oak Ridge National Laboratory, the United States Navy and the National Aeronautics and Spa...

AI Technical Summary

Problems solved by technology

In the prior art, when preparing foamed carbon-carbon nanotube composite materials, most of them use the finished carbon nanotubes for compounding. Some have the problem of weak bonding between carbon nanotubes and foamed carbon, and some use Carbon nanotubes are embedded in the foamed carbon skeleton. Although the mechanical properties of carbon nanotubes are used to enhance the foamed carbon material, it also covers up the unique structural characteristics of carbon nanotubes, so that some of its special properties cannot be fully utilized.

Images