改性氧化石墨烯对环氧树脂基复合材料热膨胀系数影响的研究  

Influence of modified graphene oxide on the coefficient of thermal expansion of epoxy composite

作　　者：杨松[1] 赫玉欣[1,2,3] 冯孟婷 张丽 刘少祯[5] 张兴龙 秦明志 陈冰 蒋元力 Yang Song;He Yuxin;Feng Mengting;Zhang Li;Liu Shaozhen;Zhang Xinglong;Qin Mingzhi;Chen Bing;Jiang Yuanli(College o{Chemical Engineering and Pharmaceutics,Henan University of Science and Technology,Luoyang 471023;College of Chemistry &Chemical Engineering, Luoyang Normal University,Luoyang 471022;Liming Chemical Research and Design Institute Co.,Ltd.,Luoyang 471000;Shangqiu Guolong New Materials Co.,Ltd.,Shangqiu 476000;Henan Energy and Chemical Industry Group Research Institute Co.,Ltd.,Zhengzhou 450001)

机构地区：[1]河南科技大学化工与制药学院,洛阳471023 [2]商丘国龙新材料有限公司,商丘476000 [3]河南能源化工集团研究院有限公司,郑州450001 [4]洛阳师范学院化学化工学院,洛阳471022 [5]黎明化工研究设计院有限责任公司,洛阳471000

出　　处：《化工新型材料》2019年第1期74-78,共5页New Chemical Materials

基　　金：河南省科技攻关项目(162102210052)资助;浙江省公益性技术资助项目(2016C31031);温州市公益性科技计划项目(G20160024)资助;河南科技大学SRTP项目(201810464033)资助

摘　　要：环氧树脂(EP)热膨胀系数(CTE)为65×10^(-6)℃^(-1),碳纤维(CF)CTE为-12×10^(-6)℃^(-1),因此降低EP的CTE是提高碳纤维增强环氧树脂(CF/EP)复合材料低温使用性能的关键。采用氧化石墨烯(GO)和四氧化三铁改性氧化石墨烯(Fe_3O_4-GO)修饰EP,研究了GO及Fe_3O_4-GO对EP基体CTE的影响。结果表明:由于Fe_3O_4-GO表面的官能团可与EP基体形成共价键,从而加强了与EP基体的界面作用;相对于纯EP,GO和Fe_3O_4-GO改性EP的玻璃化转变温度(Tg)分别升高了3.71℃和5.74℃;相对于纯EP,GO和Fe_3O_4-GO改性EP在Tg下的CTE值分别降低了23.77%和33.61%,但在Tg上的CTE值均高于纯EP。Coefficient of thermal expansion(CTE)of epoxy and carbon fiber are 65×10^-6℃-1 and-12×10^-6℃-1,respectively.CTE has a big influence on the property of carbon fiber reinforced epoxy laminate and how to decrease CTE value of epoxy matrix is the key to improve its property at cryogenic temperature.Graphene oxide(GO)and Fe3O4 modified graphene oxide(Fe3O4-GO)were applied to modified epoxy and its CTE value was studied.The results showed that covalent bond was formed between filler and epoxy,which strengthen the interfacial bonding between filler and epoxy matrix.Glass transition temperatures(Tg)of GO and Fe3O4-GO modified epoxy resin were all improved.In comparison to neat epoxy,CTE values of GO and Fe3O4-GO modified epoxy resin belowTgrange were decreased 23.77% and 33.61%,respectively,but CTE values of GO and Fe3O4-GO modified epoxy resin were all higher than neat epoxy when above Tgrange.

关 键 词：环氧树脂 氧化石墨烯 改性 热膨胀系数 

分 类 号：TB332[一般工业技术—材料科学与工程]