摘要
为了改善炭纤维/环氧树脂复合材料的界面性能,以对硝基苯胺为原料,通过两步重氮化还原反应,在炭纤维表面共价接枝氧化石墨烯,制备出氧化石墨烯/炭纤维(GO/CF)复合增强体。研究了反应机理,并对改性前后炭纤维表面的化学结构、微观形貌、表面粗糙度、单丝拉伸强度和炭纤维/环氧树脂复合材料的界面性能等进行了测试分析。结果表明,接枝GO后,炭纤维表面粗糙度增加了188%,单丝拉伸强度提高了13. 2%,断裂伸长率增加12. 1%,界面黏结强度提高了80. 2%。
Graphene oxide(GO)was grafted on the surface of carbon fibers(CFs)by a two-step diazo reaction using p-nitroaniline as the linking precursor.The strength of the covalent bond between the CFs and the GO was estimated by a gradient ultrasound method.The mechanism of the grafting reaction was verified by cyclic voltammetry.Results indicate that the surface roughness,tensile strength and elongation of the GO-modified CFs are increased by 188%,13.2%and 12.1%,respectively.The interfacial bond strength in the epoxy matrix composite using the modified CFs as a reinforcement increased by 80.2%compared with that of the pristine CFs.
作者
刘玉婷
姚婷婷
宋红艳
吴刚平
LIU Yu-ting;YAO Ting-ting;SONG Hong-yan;WU Gang-ping(National Engineering Laboratory for Carbon Fiber Technology,Institute of Coal Chemistry, Chinese Academy of Sciences,Taiyuan030001,China)
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2018年第6期595-604,共10页
New Carbon Materials
基金
国家自然科学基金(U1362107,51002165)
山西省科技攻关项目(2015031013).
关键词
氧化石墨烯
炭纤维
重氮盐
电化学还原
共价键
Graphene oxide
Carbon fiber
Diazonium salt
Electrochemical reduction
Covalently
作者简介
刘玉婷,硕士.E-mail:liuyuting356@163.com;通讯作者:吴刚平,博士,研究员.E-mail:wgp@sxicc.ac.cn
