改性聚氨酯上浆剂对碳纤维与环氧树脂界面性能的影响  

Effect of Modified Polyurethane Sizing Agent on Interfacial Properties of Carbon Fiber

作　　者：毛丽贺[1,2] 申宏旋 李嘉禄 陈利[1,2] Lihe Mao;Hongxuan Shen;Jialu Li;Li Chen(School of Textile, Tianjin University,Tianjin 300387, China;Key Laboratory of Advanced Textile Composites of the Ministry of Education, Tianjin 300387, China)

机构地区：[1]天津工业大学纺织学院 [2]天津工业大学先进纺织复合材料教育部重点实验室,天津300387

出　　处：《高分子材料科学与工程》2019年第2期97-101,106,共6页Polymer Materials Science & Engineering

基　　金：天津市高等学校创新团队项目(TD13-5043)

摘　　要：以硅烷偶联剂为媒介,将CH_2-C(CH_3)CO_2(CH_2)_3基团引入聚氨酯上浆剂中,合成改性聚氨酯碳纤维上浆剂,对碳纤维表面进行上浆改性。探讨改性聚氨酯上浆剂对碳纤维表面性能的影响。通过扫描电子显微镜、X射线光电子能谱、傅里叶变换红外光谱、接触角测量、力学性能测试对碳纤维表面形貌、含氧官能团、纤维与树脂之间的接触角及复合材料的层间剪切性能进行了分析和研究。结果表明,经改性聚氨酯上浆后的碳纤维表面活性基团增加,碳纤维与树脂之间的润湿性提高,复合材料的界面剪切强度增加;当上浆浓度为1%时碳纤维表面光滑,与树脂之间的润湿角最小,层间剪切强度比上浆处理前提高了16.3%。The modified polyurethane sizing agent for carbon fiber was synthetized that the silane coupling agent was used as medium to introduce CH2-C(CH3)CO 2(CH2) 3 groups into the polyurethane sizing agent, then the surface of carbon fiber was modified. Investigated and analysed the effects of modified polyurethane sizing agent on surface properties of carbon fiber. The surface morphology of carbon fiber, oxygen-containing functional group, contact angle between fiber and resin, interlaminar shear properties of composite materials were obtained via scanning electron microscope, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), contact angle measurement, universal mechanical testing machine. The results show that the number of active groups is increased on the surface of carbon fiber after sized with modified polyurethane, the wettability between carbon fiber and resin is improved, and the interfacial shear strength of composite materials is increased. The surface of carbon fiber is smooth, the wetting angle between carbon fiber and resin is the minimum when the sizing concentration is 1%, the interlayer shear strength of carbon fiber and epoxy resin is increased by 16.3% than before the sizing treatment.

关 键 词：聚氨酯 上浆 碳纤维 表面性能 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]