Carbon fiber sizing agent

Abstract

The invention discloses a carbon fiber sizing agent which is prepared from the following materials in parts by weight: 5-25 parts of phenolic resin, 1-5 parts of blend resin, 0.01-5 parts of antistatic agent and 100 parts of solvent, wherein the phenolic resin is thermoplastic phenolic resin or modified phenolic resin, and the blend resin is thermoplastic resin or thermosetting resin. The carbon fiber sizing agent is prepared through the following steps of: firstly, uniformly mixing the phenolic resin and the blend resin, adding a solvent accounting for 10-20% of the total amount of the solvent, enabling the resin to be dissolved in the solvent, and stirring the obtained mixture into a homogeneous solution at room temperature; and then, adding the antistatic agent into the homogeneous solution, stirring the obtained mixture so as to dissolve the antistatic agent, adding the rest of the solvent, and mixing the obtained product so as to obtain an integral solution, thereby obtaining the carbon fiber sizing agent. The carbon fiber sizing agent disclosed by the invention can be compatible with thermoplastic matrix resin better; the matrix resin can fully wet carbon fibers, thereby directly achieving a stress transfer effect on the fibers and the matrix; and compared with an epoxy resin sizing agent, the interlayer shear strength of a composite material of the carbon fiber sizing agent is increased by 15-20%.

Description

technical field [0001] The invention relates to a carbon fiber sizing agent. Background technique [0002] Carbon fiber / resin-based composite material has a series of excellent properties such as high specific strength, high specific modulus, corrosion resistance, ablation resistance, fatigue resistance and dimensional stability. It is one of the representatives of carbon fiber composite materials and has been widely used in textile machinery, industry and other fields. As an important matrix material for resin-based composite materials, epoxy resin has a series of advantages such as good adhesion, heat resistance, chemical corrosion resistance, high strength and convenient processing, but its cured product has poor adhesion to fibers and is easy to process. Cracking, it is difficult to meet the growing engineering technology requirements. In order to meet the needs of the market, more and more attention has been paid to carbon fiber composites based on thermoplastic resi...

AI Technical Summary

Problems solved by technology

[0003] At present, the carbon fiber sizing agents based on epoxy resin film-forming agents are the most researched, such as US4751258, US4420512, and US5688554. However, during the preparation of reinforced thermoplastic resins, carbon fibers will have obvious phase separation, and the performance of composite materials is large. drop in magnitude