Preparation method of carbon fiber/carbon nano tube/epoxy resin multi-dimensional hybrid composite

Abstract

The invention belongs to the technical field of nano materials, and in particular relates to a preparation method of a carbon fiber / carbon nano tube / epoxy resin multi-dimensional hybrid composite. The invention comprises the following steps: carrying out surface carboxylation and chloride acetylation on carbon nano tubes and carbon fibers, introducing diamine or polyamine, and modifying the amino-grafted carbon nano tubes with small-molecule aromatic polyanhydride compounds to prepare carbon nano tubes carrying with anhydride groups; carrying out ultrasonic oscillation, stirring at a high speed to dispersing the carbon nano tubes in an epoxy resin matrix, and curing with organic anhydride curing agent to obtain an epoxy resin polymer containing carbon nano tubes; and using the epoxy resinpolymer containing the carbon nano tubes as the matrix for being compounded with the carbon fibers to form the covalently-bonded multi-dimensional hybrid composite structure. The invention has the advantage of convenient preparation; the carbon nano tubes are endued with activity for participating in the reaction, and the anhydride groups on the carbon nano tubes and the epoxy groups in the epoxyresin generate chemical crosslink, thereby promoting the dispersion of the carbon nano tubes in the epoxy resin; and the epoxy resin is toughened by using the strength and the toughness of the carbonnano tubes to enhance the bonding strength with the carbon fiber substrate, thus improving the overall performance of the carbon fiber / carbon nano tube / epoxy resin multi-dimensional hybrid composite,and widening the application of the carbon fibers, the carbon nano tubes and the epoxy resin.

Description

Preparation method of carbon fiber / carbon nanotube / epoxy resin multidimensional hybrid composite material technical field The invention belongs to the technical field of nanometer materials, in particular to a method for preparing a carbon fiber / carbon nanotube / epoxy resin multidimensional hybrid composite material. Background technique Epoxy resin is a thermosetting oligomer with poor properties. In addition to being used as a stabilizer for polyvinyl chloride, it has no direct use value. But when it reacts with the curing agent to form a three-dimensional cross-linked network structure, it presents a series of excellent properties. Therefore, the chemical reaction between curing agent and epoxy resin is the basis and core of epoxy resin application. The behavior of the epoxy resin during the curing process and the performance of the cured product depend to a large extent on the performance of the curing agent and the interaction and reasonable coordination between it a...

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Problems solved by technology

Carbon nanotubes have high surface energy and are prone to agglomeration, making it difficult to achieve uniform dispersion in polymers

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