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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
關鍵詞: graphene  epoxy  composites  
資料大小: 104K
所屬學科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(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
上傳時間: 2013-07-01 14:07:30
下載次數: 1
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