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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

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