表面粗糙度和含氧官能团对炭纤维/环氧树脂界面黏结的贡献  

Contribution of surface roughness and oxygen-containing groups to the interfacial shear strength of carbon fiber/epoxy resin composites

作　　者：梁乙偲 张兴华[1,3] 魏兴海[1,3] 经德齐[1,3] 苏维国 张寿春[1,2,3] LIANG Yi-cai;ZHANG Xing-hua;WEI Xing-hai;JING De-qi;SU Wei-guo;ZHANG Shou-chun(Research Center of Advanced Thermoplastic Composites Engineering,Institute of Coal Chemistry,Chinese Academy Sciences,Taiyuan 030001,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Carbon Materials,Institute of Coal Chemistry,Chinese Academy Sciences,Taiyuan 030001,China;National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]中国科学院山西煤炭化学研究所先进热塑性复合材料工程研究中心,山西太原030001 [2]中国科学院大学材料与光电研究中心,北京100049 [3]中国科学院山西煤炭化学研究所炭材料重点实验室,山西太原030001 [4]海军工程大学舰船综合动力系统国家重点实验室,湖北武汉430033

出　　处：《新型炭材料（中英文）》2023年第6期1116-1126,共11页New Carbon Materials

基　　金：山西省重点研发计划(202003D111002);山西省科技重大专项计划(202101040201003);国家自然科学基金(51903249);中国科学院山西煤炭化学研究所创新基金项目(SCJC-XCL-2022-12).

摘　　要：炭纤维(CF)与基体之间的界面黏结对CF增强聚合物复合材料的性能至关重要。为了评估机械啮合和化学键合对炭纤维增强环氧树脂(EP)复合材料界面黏附性能的贡献,分离了炭纤维的表面粗糙度和含氧官能团以研究它们对界面黏附的影响。结果表明,氨水处理提高了表面粗糙度而不改变化学性能,而电化学处理在不改变表面粗糙度的情况下提高了化学性能。采用微滴法测试了CF/EP的界面剪切强度(IFSS),并通过线性拟合得到了IFSS与表面粗糙度和氧含量之间的函数关系。结果表明,在双官能和四官能环氧树脂体系中,化学键合对于增强界面黏附的贡献因子高于机械互锁。The interfacial shear strength(IFSS)between carbon fibers(CFs)and the matrix is crucial to the performance of CF-reinforced polymer composites.To evaluate the contribution of mechanical interlocking and chemical anchoring at the interfaces of a polyacrylonitrile-based CF(TORAYCA T800SC-12000-10E)-reinforced epoxy resin(EP:bisphenol A type epoxy resin and tet-rafunctional epoxy resin)composites,the surface roughness and content of oxygen-containing functional groups of the CFs were re-spectively altered by ammonia treatment and electrochemical oxidation.The results showed that ammonia treatment increased the surface roughness without much change to the surface elemental composition,while electrochemical oxidation increased the number of surface oxygen groups without changing the surface roughness.The IFSS of CF/EP composites was tested by the micro-droplet method.The relationships between IFSS,and surface roughness and oxygen content were obtained by linear fitting.The results showed that in the interfacial bonding of CF to epoxy resin,the contribution of chemical anchoring to the IFSS is larger than that of mechanical interlocking.

关 键 词：炭纤维 环氧树脂 机械啮合 化学键合 界面黏结 

分 类 号：TQ127.11[化学工程—无机化工]