具有类液体行为的碳纳米管衍生物的制备、结构及特性

、()UDC10497SynthesisofaLiquidLikeCarbonNanotubesandStudyonTheirStructureandCharacter430070200706200706200706I1276.3%21.9%4.516-15.852343.17mg/ml4.58mg/ml56h10h14h(GG')18h(T56.7)(G'G)(T56.7)(GG')6PEGIIABSTRACTInthispaper,wedevelopedakindoffunctionalizedcarbonnanotubesthatexhibitliquidlikebehaviorintheabsenceofdiluentsorsolvent.TheliquidlikecarbonnanotubesweresynthesizedbyattachingaflexiblechainsPEG-substitutedtertiaryamineontocarbonnanotubes.Thenwefurtherresearchedtheinfluenceofthetimeforoxidizedtothepropertyofliquidlikecarbonnanotube.1.Wesuccessfullysynthesizedanewkindofcarbonnanotubederivativesbasedonthree-stepprocess,whichincludedirradiation,oxidation,ionization,andthroughaseriesoftestweapprovedthatthenewkindofcarbonnanotubederivativespossessamphiphilicpropertiesandaredispersibleinbothaqueousandorganicmedia,andalsoexhibitliquidlikebehaviorintheabsenceofasolvent.2.TheflexiblechainsofPEG-substitutedtertiaryaminewereattachedbothontheportandsidewayofcarbonnanotubes.Thecarbonnanotubederivativescontain76.3masspercentofPEG-containingorganicmodifier,and21.9masspercentofcarbonnanotubes.BecauseofhighlevelofPEG-containingorganicmodifier,theviscosityofderivativesbecamelowerwithhighertemperature.Also,thederivativesunderwentasolid-to-liquidtransitionwiththemeltingtemperatureat4.516,andcrystallizationtemperatureat-15.852.3.Withthefurtherresearchonthetimeofoxidation,wefoundthatthelengththecarbonnanotubesbecameshorterandshorterwithextendingthetimeofoxidation,frommicronatthebeginningtonanometerintheend,however,thefabricofcarbonnanotubesyetdestroyed.Atthesametime,withtheprolongingofthetimeofoxidation,theatompercentoftheOelementbecamemoreandmore.4.Thedissolvabilitytestingforthederivativesindicatedthatthesolubilityintensifiedwiththeprolongingofthetimeofoxidation,from3.17mg/mlincreasingto4.58mg/ml.5.TheDynamicmechanicalpropertyanalysisindicatedthatthecarbonnanotubesderivativeswhichoxidizedfor6h,10h,14hexhibitedliquidlikebehavior,however,thederivativesthatoxidizedfor18hexhibitedsolidlikebehaviorbelowIII56.7,andexhibitedliquidlikebehaviorabove56.7.6.TheViscosityanalysisofPEG-MWNTswithdifferentoxidationtimeindicatedthatwiththeoxidationtimeprolonging,thecontentofPEGtailbecamehigher,theinfluenceofthetemperaturetotheviscositybecameweaker.Atthesametime,theviscositybecamelowerwiththelengthoftheMWNTsbecomingshort.KeyWord:Multi-WalledCarbonNanotubes,PEG-substitutedtertiaryamine,Oxidation,Liquidlikefluid,IonicfunctionalizationIV..............................................................................................................................................IABSTRACT...................................................................................................................................II....................................................................................................................................11.1...............................................................................................................11.2........................................................................................11.2.1..........................................................................................11.2.2..........................................................................................21.3...........................................................................................31.3.1..................................................................................................41.3.2......................................................................................41.3.3..............................................................................................................51.4............................................................................61.4.1..........................................................................71.4.2....................................................................121.5.............................................................................................14........................................................................................152.1.............................................................................................................................152.2.....................................................................................................................152.2.1............................................................................................................152.2.2............................................................................................................162.2.3........................................................................................162.2.4............................................................................162.2.5............................................................................172.2.6........................................................................................................172.3...................................................