Continuous carbon fiber reinforced nylon composite material used under continuous high temperature environment, and preparation method thereof

Abstract

The present invention discloses a continuous carbon fiber reinforced nylon composite material used under a continuous high temperature environment, and a preparation method thereof. The continuous carbon fiber reinforced nylon composite material comprises, by weight, 100 parts of a nylon resin, 5-150 parts of continuous carbon fibers, 1-15 parts of a compatibilizing agent, 0.1-3 parts of an antioxidant, 0.03-2 parts of an organic copper salt compound, 0.1-3 parts of a free radical scavenger, 0.05-2 parts of an anti-hydrolysis agent, and 0.1-5 parts of a lubricant. The preparation method comprises: adopting nylon, a compatibilizing agent, an additive for inhibiting high temperature oxidation degradation, and the like, carrying out melt extrusion through an extruder, and carrying out complete impregnating on continuous carbon fibers through an impregnating machine head to prepare the continuous carbon fiber reinforced nylon composite material. According to the present invention, the material has characteristics of super high comprehensive mechanical property, good size stability, permanent antistatic property, electromagnetic wave shielding, and small friction coefficient, wherein mechanical property retention rate after continuous use for 4000 h under a 160 DEG C high temperature environment is more than 85%.

Description

technical field [0001] The invention relates to a nylon composite material, more precisely, a continuous carbon fiber reinforced nylon composite material used in a continuous high temperature environment and a preparation method thereof. Background technique [0002] Nylon has excellent comprehensive properties such as good mechanical properties, good flexibility, wear resistance, oil resistance, self-lubricating property, easy forming and processing, etc. It is widely used in the automobile industry, electronic and electrical industry, mechanical equipment, construction industry, etc. field. Carbon fiber is mainly a special fiber composed of carbon elements. The molecular structure is between graphite and diamond. The carbon volume fraction varies with the variety, generally above 0.9; the main types are polyacrylonitrile-based carbon fiber, pitch-based carbon fiber, Viscose-based carbon fiber; carbon fiber has the characteristics of general carbon materials, such as high ...

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Problems solved by technology

[0004] Most of the existing carbon fiber reinforced nylon composite materials are prepared by mixing carbon fiber and nylon in the extruder through a twin-screw extruder. The carbon fibers are arranged randomly in the composite material and the length is usually less than 1mm. The composite mechanical properties and Compared with nylon resin, it has been greatly improved, but it has not fully utilized the advantages of high strength and high modulus of carbon fiber; due to the presence of amide groups in the molecular structure of nylon, it is easy to degrade when using nylon resin in a continuous high temperature environment, resulting in comprehensive mechanical properties of materials. performance drops drastically

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