聚酰亚胺和碳纳米管复合材料的应用

聚酰亚胺和碳纳米管复合材料的应用ThepropertyofPolyimideandCNTandtheirinitialapplicationThespecificapplicationofPI/CNTcompositesSomeotheruseofPI/CNTcompositesAbstract:ThepropertyofPolyimideandCNTandtheirinitialapplicationThePropertyofPolyimideandCarobonNanotube•HighYoung’smodulusandtensilestrength.•Canbemetallicorsemiconductingdependingontheirstructuralparameters.•Superiorthermalstability•Gooddielectricproperties•Goodchemical&radiationresistance•Lowthermalexpansioncoefficient•Highstrength•HighflexibilityPolyimide:Carbonnanotube:TheAdvantageofPolymericNanocompositesTheApplicationofPI/CNTcompositesinAerospaceFutureaerospacevehicleswillrequireasignifi-cantreductionofmass,sizeofcomponents,andpowerrequirements,accompaniedbyanincreaseintheintelligenceofthesecomponents.Singlewallcarbonnanotubes(SWNTs)areattractivefortheseapplicationsbecauseoftheirextraordinarycombinationofthermal,electrical,dielectric,andmechanicalproperties.ThespecificapplicationofPI/CNTcompositesElectrostaticdischarge(ESD)Polyimidesarewidelyusedinapplicationsrangingfrommicroelectronicstoaerospace.Duetotheirinsulatingnature,significantaccumulationofelectrostaticchargemayresultontheirsurface,causinglocalheatingandprematuredegradationtoelectroniccomponentsorspacestructures.CNTPolyimideElectricalcompositeswithalevelofelectricalconductivitysufficienttopermitelectrostaticdischarge,aswellasmechanicalandthermalpropertiessuperiortothatofthebasepolymer.Resistive-typehuminitysensor•capacitivetypehumiditysensor:useslesspowerandhasmuchbetterlinearity.•Resistivetypehumiditysensor:muchsimplerandmorestraightforwardthancapacitancemeasurementsKum-PyoYoo,Lee-TaekLim,ect.Novelresistive-typehumiditysensorbasedonmultiwallcarbonnanotube/polyimidecompositefilms.SensorsandActuatorsB:Chemical2010,145:120-125.Kum-PyoYoo,Lee-TaekLimdevelopedanovelresistive-typeRHsensorbasedonplasma-treatedmultiwallcarbonnanotube/polyimide(pMWCNT/PI)compositefilms,successfullyovercomethesedrawbacks.Theadvantageofpolyimide-basedpolymersinhumiditysensing•Highsensitivity•Bi-directionalwatertransport•Resistancetomostchemicalattacks•Hightemperaturecapability•CompatiblewiththeCMOSprocessThecomparisonbetweencapacitiveandresistive-typehuminitysensorhighcut-offhumidity(detectionlimit)ataround30–42%relativehumidity(RH).PressuresensorTheadvantageofpolyimidebasedpressuresensor:•light•Mechanicallydurable•Thermalstability•flexible•RelativelyeasytomanufactureComparedwithpiezoelectric,magnetoresistive,optical,andacousticstressandstrainsensors,piezoresistivesensorshaveattractedparticularattentionbecausetheyarenotinfluencedbyunexpectedexternalstimulisuchasstaticchargesandmagneticfields.Sopiezoresistivesensorsareparticularlysuitableforaerospaceapplication.PiezoresistiveCharacteristicsofSingleWallCarbonNanotube/PolyimideNanocomposites.JournalofPolymerScience:PartB:PolymerPhysics,Vol.47,994–1003(2009)PiezoresistivecharacteristicsofMWNTnanocompositesandfabricationasapolymerpressuresensor.Nanotechnology20(2009)185503(11pp)flexiblecoppercladlaminated(FCCL)films•highflexibility•highglasstransitiontemperature•lowthermalexpansioncoefficient•excellentthermalstability•radiationresistance.TheadvantageofpolyimideusedinFCCL:•superiorthethermal,electricalandmechanicalproperties•Lowthermalexpansioncoefficient•HigherdielectricconstantPI/CNTcompositesusedinFCCL:ActuatorAnactuatorisamechanicaldeviceformovingorcontrollingamechanismorsystem.Ittakesenergy,usuallytransportedbyair,electriccurrent,orliquid,andconvertsthatintosomekindofmotion.-Wikipedia•Improvedelectromechanicalresponse•superiormechanicalandelectricalproperties•Lightweight•Goodconformability•Hightoughness•TailorableAll-OrganicActuatorFabricatedwithSingleWallCarbonNanotubeElectrodes.JournalofPolymerScience:PartB:PolymerPhysics,Vol.46,2532–2538(2008)Schematicdiagramofpreparinganall-organicactuator(crosssectionview)AprototypeactuatorfilmTheadvantageofpolymerbasedactuator:•TheadditionofSWCNTsleadtosignificantenhancementoftheelectrostrictivestrainduetotheincreaseofinterfacialpolarization.•exhibitssuperbactuationpropertiesandcanwithstandhightemperatureswithimprovedmechanicalintegrityandchemicalstability.Polyimide/CNTbasedactuator:CouldPI/CNTcompositesbeusedaselectrode?AgCNTfilmsCommonmetalComparisonofCNTandcommonmetal6.06·10_9=10_7280S·cmPI/CNT0.1%wt1.6·10_-8SomeotheruseofPI/CNTcompositesSomeotheruseofPI/CNTcompositesGasseparation(carbonmolecularsievemembranes)tribologicalsuperhydrophobicity•Highthermalstability•Highpermeabilityandselective•Excellentgasseparation•Highchemicalandwearresistance•Stableinvariousharshatmosphere•Thermalstability•GoodmechanicalstrengthAcomparisonofcarbon/nanotubemolecularsievemembraneswithpolymerblendcarbonmolecularsievemembranesforthegaspermeationapplication.MicroporousandMesoporousMaterials113(2008)499–510Biomimeticpolyimidenanotubearrayswithslipperyorstickysuperhydrophobicity.JournalofColloidandInterfaceScience344(2010)541–546CarbonNanotubeReinforcedPolyimideThin-filmforHighWearDurability.TribolLett(2007)27:181–188•Highthermalstability•Highch