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Functionalized Graphene with Liquid-Iike Manner  
Functionalized Graphene with Liquid-Iike Manner
资料类型: PDF文件
关键词: functionalization  graphene  liquid-iike  manner  
资料大小: 105K
所属学科: 分子表征
来源: 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:
Graphenehasattractedtremendousattentionsfromworldwideresearchersbyvirtueofitsuniquecarriertransportproperties,ultra-highspecificsurfacearea9remarkableelectricalandthermalconductivity,aswellasoutstandingmechanicalstrengthcl‘2].However,wideexploitationoftheseexcitingpropertieschieflyreliesonmaterial‘sprocessabilityc3].Therefore,surfacemodificationiscrucialtoachievediverseutilizationsofthismonolayernanostructure.Herein,wereportthree-stepstrategyforsynthesisofgraphenederivativewithuniqueliquid-likebehaviorinabsenceofanysolventunderroomtemperature,aswellasexcellentsolubilityinbothaqueousandorganicsolvents,whichpromisegreatpotentialforfutureapplications.Typically,Grapheneoxide(GO)waspreparedfromgraphiteflakesviasimplymodifiedHummersmethod.Then,(H0)3Si(CH2)3S03H(SIT)wascovalentlygraftedontoGOthroughthedehydrationbetweenhydroxylsofthetworeactants,andtheresultantfurtherunderwentionexchangeprocesswithC9Hl9C6H4(OCH2CH2)100(CH2)2N+(CH3)3C1-(NPEQ),atypicalflexibleorganicionsalt,toyieldthegraphenenanofluids(GF).DifferentialscanningcalorimetrictraceindicatesthattheGFtransferfromsolidtoliquidat0.7090C,ingoodcoincidenceoftheopticalobservations.ThermalgravimetricanalysisrevealsthattheproportionoforganiccontentintheGFisashighas89%,whichshouldaccountforthefavorablefluidityunderambient.Additionally,thegoodaqueoussolubilitycanbeascribedtoitsionicnature,andtheoil-solubilityshouldstemfromsurfacegraftedNPEQmolecules.Thefacilesynthesisandnovelfunctionalitiesareexpectedtopropeltheprospectiveexplorationandapplicationsofgraphene-basedmultifunctionalnanocompositesanddevicesbyfacilitatingthefabricatingprocesses.
作者: D. N. Li, X. Du, L. J. Dong, C. X. Xiong
上传时间: 2013-06-28 14:36:51
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