Method for preparing CNT-Cu composite powder by solution combustion method

Abstract

The invention provides a method for preparing CNT-Cu composite powder by a solution combustion method, and relates to the field of composite material preparation. The method comprises the following steps that (1), copper nitrate, functionalized carbon nanotubes, cane sugar and deionized water are mixed, and then subjected to ultrasonic stirring for 30 minutes to enable all the components to be uniformly mixed to obtain a mixed solution; (2), the mixed solution obtained in the step (1) is poured into a corundum crucible to be heated, and the mixed solution is combusted to obtain precursor composite powder after undergoing water evaporation, boiling and bubbling; and (3), the precursor powder obtained through combustion of the solution in the step (2) is reduced to obtain the carbon nanotubecopper composite powder by adopting a reduction process in an aqueous solution powder mixing method. According to the method for preparing the CNT-Cu composite powder by the solution combustion method, the process is simple, the reaction is rapid, the efficiency is high, the cost is low, the product purity is high, all the components can achieve uniform mixing on the molecular level, moreover, inthe combustion process, the material experiences relatively large temperature change in a short time and then possibly generates a metastable phase, and then the phase-to-phase bonding strength can be improved.

Description

technical field [0001] The present application relates to a method for preparing composite materials, in particular to a method for preparing CNT-Cu composite powder by a solution combustion method. Background technique [0002] The excellent electrical and thermal conductivity of carbon nanotubes, high specific strength, low density and low thermal expansion coefficient make it not only as a reinforcement of polymer materials, but also as a reinforcement of metal matrix composites. It shows great application potential. However, compared with polymers, carbon nanotubes have poor wettability and almost incompatibility with metals, and their composite materials have problems such as difficult uniform dispersion of carbon nanotubes and poor interface bonding. Therefore, how to adopt effective preparation methods and technological means to achieve The uniform dispersion of carbon nanotubes in the copper matrix and the improvement of its interfacial bonding strength have become t...

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is to propose a method for preparing CNT-Cu composite powder by solution combustion method in order to solve the problem that the existing carbon nanotubes and metals are difficult to scale up. Cuprous and carbon nanotubes are mixed to prepare composite powder, and the uniform dispersion of carbon nanotubes is realized under the assisted action of static electricity, which greatly simplifies the preparation process and is suitable for large-scale preparation

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