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碳纤维增强聚醚醚酮复合材料的界面改性 被引量:4

Interfacial Modification for Carbon Fiber Reinforced Polyetheretherketone Composite
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摘要 由于其优异的性能。碳纤维(CF)增强聚醚醚酮(PEEK)热塑性复合材料是近年来先进复合材料研发的热点。但因PEEK熔融黏度大、CF丝束密集且具有化学惰性,树脂对纤维丝束浸渍困难和界面相互作用弱阻碍了高性能热塑性复合材料广泛应用,放改进界面性能是研究的重点。本文采用聚醚酰亚胺(PEI)以及聚醚酰亚胺/氧化石墨烯(PEI/GO)对活化后的CF表面进行界面改性处理,再通过模压成型制备CF/PEEK复合材料。结果表明,1 wt%PEI改性剂有效增强了纤维-基体间的相互作用力,0.5 wt%GO的添加使得界面结合性能进一步提升,层间剪切强度(ILSS)提高了68%,弯曲强度、弯曲模量分别提高了54%、68%。复合材料破坏形式由树脂-基体脱黏转变为基体内部断裂。 Due to its excellent properties,carbon fiber(CF)reinforced polyetheretherketone(PEEK)thermoplastic composite material has been the focus of researches on advanced composite materials in recent years.However,because of the high melt viscosity of PEEK,and the close packing and chemically inertness of the CF tow,the PEEK resin is difficult to impregnate the fiber tow,which results in a weak interfacial interaction and hinders the wide application of CF/PEEK composites.We used polyetherimide(PEI)and polyetherimide/graphene oxide(PEI/GO)to modify the surface of activated CF,and then prepared CF/PEEK composites by compression molding.Results showed that 1 wt%PEI modifier effectively enhances the fiber-matrix interaction force,and the addition of 0.5 wt%GO further improves the interfacial bonding performance.As a result,the interlaminar shear strength(ILSS)increased by 68%,whilethe flexural strength and flexural modulus increased by 54%and 68%respectively.The failure mode of the composite material changes from resin-matrix debonding to internal fracture of the matrix.
作者 孙一剑 吴举 Elwathig A.M.Hassan 卿雪芹 徐捷 朱姝 SUN Yijian;WU Ju;ELWATHIG A.M.Hassan;QING Xueqin;XU Jie;ZHU Shu(Donghua University,Shanghai Collaborative Innovation Center For High Performance Fiber Composites,Shanghai 201620,China;Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 200436,China;Songjiang South Hospital,Shanghai First People’s Hospital,Shanghai 201620,China)
出处 《高科技纤维与应用》 CAS 2021年第2期21-27,共7页 Hi-Tech Fiber and Application
基金 上海市科委科技创新行动计划项目(20511107200)。
关键词 碳纤维(CF) 聚醚醚酮(PEEK) 界面改性 力学性能 carbon fiber(CF) polyetheretherketone(PEEK) interfacial modification mechanical performances
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