CARBON FIBER SURFACE MODIFIER, MODIFIED CARBON FIBER, COMPOSITE MATERIAL AND PREPARATION METHODS THEREFOR

摘要

The present invention provides a carbon fiber surface modifier, a modified carbon fiber, composites, and preparation methods therefor. The general structural formula of the carbon fiber surface modifier is as represented by formula (I): in formula (I), R₁, R₂, R₁' and R₂' respectively and independently represent hydrogen, hydroxyl, or the alkyl of C₁-C₃; R₃ and R₄ respectively and independently represent C₁-C₁₈ alkyl, C₁-C₁₈ alkoxyl, hydroxyl, amino, halogen, hydrogen, amide, ester, or siloxyl, wherein R₃, R₄ are not simultaneously hydrogen; R₅ represents hydrogen, hydroxyl, amino, halo, or alkoxyl. The carbon fiber surface modifier of the present invention extends the field of application for carbon fibers. The modified carbon fiber can be widely used in thermoplastic resins such as PA, ABS, PEEK, polyolefin, and for the preparation of carbon fiber resin composite material with excellent mechanical properties.