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 below Tg range 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 Tg range.
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基金资助
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
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