EFFECT OF WATERBORNE EPOXY SIZING AGENT ON PROPERTIES OF CARBON FIBER COMPOSITES

Abstract

Abstract: A kind of aqueous epoxy resin sizing agent was made by the reaction of phthalic anhydride, polyethylene glycol 2000 and epoxy resin E51. Carbon fiber epoxy resin composite material was prepared by the way of vacuum bag molding process. The properties of the carbon fiber epoxy composites after sizing were estimated by thermal stability, the free energy of the contact angle surface, the surface and composite material section morphology, and interlaminar shear strength (ILSS). The results show that carbon fibers were successfully modified by sizing agent, the decomposition temperature of the sizing agent is about 300 ℃; the contact angle with water decreased from 71.4° to 65.1°, and the surface free energy increased from 32.2 mN/m to 38.9 mN/m; the interlaminar shear strength of the epoxy resin composite reached a maximum value (88.6 MPa) at sizing agent mass fraction of 6wt%, which increased by 10.3% compared with the unsized carbon fiber (80.3 MPa).

Key words: carbon fiber, sizing agent, composite material, interface property

CLC Number:

TB332

CHAI Jin, KONG Hai-juan, ZHANG Xin-yi, YU Mu-huo. EFFECT OF WATERBORNE EPOXY SIZING AGENT ON PROPERTIES OF CARBON FIBER COMPOSITES[J]. Composites Science and Engineering, 2020, 0(11): 32-36.

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