Modified carbon fiber reinforced PEK-C composite material

Abstract

The invention provides a modified carbon fiber reinforced PEK-C composite material. The PEK-C composite material is composed by mixing modified carbon fibers with PEK-C, wherein a preparation method of the composite material comprises the steps of: modification of carbon fibers, primary drying, high-speed mixing, extrusive granulation, secondary drying, and injection moulding. The PEK-C is high-temperature-resistant and self-lubricating, has excellent thermal stability and excellent mechanical performance and processability, and is widely applied in various fields. Non-processed carbon fibers have smooth surface, less active groups and high inertia, and when the carbon fibers are composited with a resin substrate, interface adhesion strength is low and high performances of the carbon fibers are difficult to achieve, which cause poor mechanical performance of the composite material; by adding the modified carbon fibers to the PEK-C, infiltration and adhesion force between fibers and the resin substrate are improved, and meanwhile, the PEK-C composite material is improved in mechanical performances.

Description

technical field [0001] The present invention relates to a composite material, in particular to a modified carbon fiber reinforced PEK-C composite material. Background technique [0002] Engineering plastic PEK-C has the advantages of high temperature resistance, hydrolysis resistance, and self-lubricating properties. Some of its comprehensive properties are similar to those of PEEK, and it has good thermal stability, electrical insulation, and excellent mechanical properties and processing properties. It is widely used in many fields, such as: aerospace, electronic appliances, medical field, automobile manufacturing industry, instrument manufacturing industry, etc., especially as a toughening resin, it can be combined with phenolic resin, BMI resin, polyphenylene sulfide resin, Epoxy resin, cyanate resin and glass fiber and carbon fiber form a blend or composite material, which has a good toughening effect. Carbon fiber has the advantages of high specific strength, high spe...

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Problems solved by technology

However, the untreated carbon fiber has a smooth surface, less active groups, and high inertness. When it is combined with a resin matrix, the interfacial bonding strength is low, and it is difficult to maximize the high performance of the carbon fiber, resulting in poor composite properties.

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