氧化石墨烯改性环氧树脂及其复合材料的性能

Properties of graphene oxide modified epoxy resin and its composites

采用机械研磨的方法制备氧化石墨烯(GO)改性环氧树脂(GH81),利用光学显微镜对GO在环氧树脂(H81)中的分散情况进行分析,通过流变仪和差示扫描量热仪对H81和GH81的热熔行为和固化行为进行表征。结果表明:GO均匀分散在基体树脂中,GO的加入不影响基体树脂的熔融黏度和固化条件;以GH81为基体树脂的碳纤维复合材料GH81-300的0°方向拉伸强度、弯曲强度和压缩强度分别为2270 MPa、2239 MPa和1529 MPa,分别较未添加GO时提高了6.4%、7.2%和7.1%。

Graphene oxide(GO)modified epoxy resin(GH81)was prepared by mechanical grinding,and the dispersion of GO in the epoxy resin(H81)was analyzed by optical microscope,while the melting performances and curing behaviors of H81 and GH81 were researched through rheometer and differential scanning calorimeter respectively.The results show that GO is uniformly dispersed into the matrix resin,and the addition of GO hardly affects the melt viscosity and curing condition of the matrix resin at all.In addition,the 0°tensile strength,bending strength and compression strength of GH81 based carbon fiber reinforced composite(GH81-300)are 2270 MPa,2239 MPa and 1529 MPa respectively,which is increased by 6.4%,7.2% and 7.1% respectively,as compared with that of composite without GO.