High performance epoxy resins composite material and preparation thereof

Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a high-performance epoxide resin composite material and a preparation method. Carboxylic acid, chloroformylation, amination or hydroxylation are carried out to the carbon nano tube; and the carbon nano tube is modified by small molecular aromatic polyanhydride compound so as to prepare the carbon nano tube which carries acid anhydride group. The carbon nano tube is dispersed in epoxide resin substrate by ultrasonic oscillation and high-speed stirring, is cured by adopting organic acid anhydride curing agent so as to obtain the carbon nano tube / epoxide resin composite material. The invention leads the preparation of the carbon nano tube / epoxide resin composite material to be more convenient, the activity of taking part in reaction of the carbon nano tube is endowed, and acid anhydride group of the carbon nano tube and the epoxide resin group of the epoxide resin generate chemical cross linking, thus improving the dispersion of the carbon nano tube in the epoxide resin and obtaining high-performance epoxide resin composite material. Compared with the control sample, all the mechanical performance indexes of the cured composite material are improved by 5 percent to 300 percent and the volume resistivity is reduced by 3 to 9 order of magnitude.

Description

technical field

[0001] The invention belongs to the technical field of nanomaterials, specifically relates to the preparation technology of carbon nanotube composite materials, and refers to a preparation method of carbon nanotube / epoxy resin composite materials used as surface structure materials, coatings or adhesives. Background technique

[0002] Since Iijima discovered carbon nanotubes in 1991, carbon nanotubes have been a research hotspot in recent years because of their unique structure, good electrical and mechanical properties. Carbon nanotubes have nanoscale diameters and micron-scale lengths, and the aspect ratio can reach 100-1000. They are extremely strong and have ideal elastic modulus. They are an excellent fiber material, and their performance is better than any current fiber. Therefore, it can be used as a superfiber for the reinforcement of advanced composite materials; because carbon nanotubes combine the semi-metallic properties of graphite with the quant...