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Highly Electrical and Thermal Conductive Composites by Direct Epoxy Infusion of Graphene Sponges  
Highly Electrical and Thermal Conductive Composites by Direct Epoxy Infusion of Graphene Sponges
資料類型： PDF文件
關(guān)鍵詞： graphene  epoxy  composites  
資料大小： 104K
所屬學(xué)科： 分子表征
來源： 第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）
簡介：
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
上傳時(shí)間： 2013-07-01 14:07:30
下載次數(shù)： 1
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