第27卷第5期瓤型炭材料V01．27No．52012年10月NEWCARBONMATERIALSOct．2012ArticleID：1007—8827(2012)05—0370—07Functionalizedgrapheneoxidewithethylenediamineand1，6一hexanediamineYANJia—lin，CHENGui-jiao，CAOJun，YANGWei，XIEBang—hu，YANGMing-bo(CollegeofPolymerScienceandEngineering，SichuanUniversity，Chengdu610065，China)Abstract：Grapheneoxide(GO)obtainedbyHummersmethodwasfuncfionalizedbyethylenediamine(EA)and1．6一hexanediamine(HA)irlN，N—dimethylformamideusing1，1．3．3-tetramethy—luroniumhexafiuorophosphateasacou—plingagent．ThefunctionalizedGowascharacterizedbyelementalanalysis，FT—IR，XRD，XPS，TGA，SEMandTEM．ResultsshowedonecarbonatominninetotenofthecarbonatomsinGOwasfunctionalizedbyallaminegroup．ThethermalstabilityoftheGOfunctionalizedbyHAwasmuchhigherthantheonefunctionalizedbvEA．However．theformerwaslessdispersibleillN．N—dimethylformamidethanthelatter．Keywords：Graphene；Grapheneoxide：Amino—functionalization：DiamineCLCnumber：TQ127．1+lDocumentcode：A1Introductionofthesegroupsmakesthefunctionalizationofgra—phenesheetsmucheasierE8|．Amongvariousfunc—Graphene．anexcellentmaterialwithstricttwo．tionalgroups，theaminegrouphasarelativelyhighdimensionallayersofsp2一bondedcarbonlocalizedonreactivityandcaneasilyreactwithmanychemi—ahoneycomblattice．hasalreadyrevealedacornuco．cals【19J．Thehighreactivityoftheattachedaminepiaofnewphysicsanditspotentialapplications。1．groupsprovidesapromisingapproachfortheprepara—Comparedwithcarbonnanotubes(CNTs)，graphenetionsandapplicationsofographene／polymercompos—revealsnotonlYobviouseconomicadvantages3．ites．Todate．theamino—functionalizedcarbonnano—butalsovariousotheradvantages．especiallythermal．tubesfACNTs)havebeenextensivelystudied㈣“J．Lmechanical．andelectricalproperties3一．TherearetwotraditionalwaystoprepareACNTs．InThetransferoftheexcellentpropertiesofgra—oneofthemethods．theoxidizedCNTsfirstreactphenetopolymer．basedcompositesfacestwomainwiththionylchloridefSoCl。)togeneratethionylproblems．Thefirstproblemislackofinterfacialbonding，whichoriginatesfromtheatomicallysmoothchloride(COCl)groupsonthesurface，whichreactwithdiaminetoCOClcompoundsdaysreplaceforandnonreactivesurfaceofgrapheneandinhibitsthewithamidegroup(CO—NH)．TheimprovedversionloadtransferfromgraphenesheetstothematrixacrossofthefirstmethodhasbeenattemptedbvHuL“J．andthefiller／polymerinterface．Thesecondproblemhasbeenprovedtobefeasible．Inanothermethod，dealswiththegraphenesheetsthatareapttoaggre—theoxidizedCNTsaredirectlydispersedindiaminegateinthepolymermatrixand，thus，haveapoorreactionisinseveraldispersion，owingtotheirlargesize。“，highsurfacecompounds，and，thecompletedenergy．andintrinsicvanderWaalsinteractionsL”J．hourswiththehelpofasmallamountofanefficientThefunctionalizedgraphenesheetscansolvethesecouplingagent。21。．Comparedwiththefirstmethod．problemsbyprovidingmultiplebondingsitesongra—thesecondoneisobviouslymoreefficientandeco—pheResheetswiththepolymermatrixL“．Incon—nomical，and，whatismore．thereactiondoesnotin—trasttopristinegraphite，thesheetsinoxidatedgraph—volvetoxicsubstances．ite，orgrapheneoxide(GO)areheavilyoxygenated，However，themethodsofproducingACNTscan—bearinghydroxylandepoxidefunctionalgroupsonnotbedirectlyappliedtoprepareamino—functionalizedtheirbasalplanes，inadditiontocarbonylandcarbox．gr...