Preparation and Characterization of Epoxy Carbon Fiber Sizing Agent
In this paper,an epoxy carbon fiber sizing agent was successfully prepared.Two emulsifiers with different hydrophilic-lipophilic balance(HLB)values were successfully prepared by using polyethylene glycol 6000,polyethylene glycol 400 and E51 epoxy resin as raw materials,and their structures were characterized by infrared spectroscopy and nuclear magnetic resonance spectroscopy.Then,two emulsifiers with different HLB values were compounded in a certain proportion to emulsify the epoxy resin.By adjusting the content of the emulsifier and the speed of the emulsifier,it is finally determined that the emulsifier compounding ratio is 7 ∶ 1,the emulsifier dosageis40%,andtheemulsificationspeedis7 000 r/min.The sizing agent prepared has the best particle size and stability.A series of tests,such as,thermal stability,wool content,scanning electron microscope(SEM)and interlaminar shear strength,are carried out on the self-made sizing agent and the carbon fiber after sizing with the self-made sizing agent.It is proved that the thermal stability of the self-made sizing agent is good,and the carbon fiber after successful sizing is significantly improved comparing with the unsized carbon fiber,and the interlaminar shear strength of the monofilament also increased 25%.
万方数据
维普
