Highly Electrical and Thermal Conductive Composites by Direct Epoxy Infusion of Graphene Sponges，第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）-中国聚合物网,论文下载

Highly Electrical and Thermal Conductive Composites by Direct Epoxy Infusion of Graphene Sponges

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关键词：

graphene epoxy composites

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所属学科：

分子表征

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第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）

简介：

Nanocompositeshavewideapplicationsasstructuralmedia,coatingsforelectricalorthermalmanagement,anddevicessuchassensorsandactuators.Toeffectivelyenhancethemechanicalandelectricalproperties,nanomaterialsfillerssuchasgrapheneareusuallydispersedinpolymermatrixuniformlywithappropriateconcentrations.However,ahugechallengestillliesinthedevelopmentofhighperformancegraphenebasedpolymercompositesbecauseoftheagglomerationtendencyofgraphenesheetsandhighcontactresistancebetweengraphenesheetsinthematrix.Recently,aporousgraphenespongewhosestructureisbasedonathree-dimensional(3D)interconnectedgraphenesheetsnetworkisreportedforoilororganicsolventsabsorptioncl].Suchporousgraphene-sponges(GS)areverysuitableforpolymerinfusionandcompositefabricate.Theconstructionof3Dinterconnectedgraphenenetworkcannotonlymakegraphenesheetsbeuniformlydistributedinthepolymermatrix,butalsosignificantlyreducethecontactresistancebetweenthegraphenesheets.Inthisstudy,GOwasfirstlysynthesizedfromgraphitepowderbythemodifiedHummersmethod.ThegraphenespongeswerefabricatedbyhydrothermaltreatmentofGOsuspensionswiththeassistanceofHI.Then,vacuumfreeze-dryingwasusedtoremovewaterandobtaingraphenesponges.Finally,GS/epoxycompositeswerepreparedbydirectlyinfusionofepoxyintothegraphenesponge.TheobtainedGS/epoxynanocompositesshowveryhighelectricalconductivityandthermalconductivity.ThehighelectricalandthermalconductivityofGS/epoxynanocompositesiscloselyrelatedwiththecompactcontactbetweengraphenesheetsinthespongestructuresandhighreductionlevelofgraphenesheets.Inaddition,comparingwiththepureepoxy,themechanicalpropertiesoftheGS/epoxyarealsogreatlyimproved.Importantly,themethodtofabricategraphenesponge/epoxyisfacile,low-cost,andscalable,providingauniversalroutefortherationaldesignandengineeringofhighperformancepolymercomposites.

作者：

Y. Q. Li, Y. A. Samad, R. Umer, K. Liao

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2013-07-01 14:07:30

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