聚酰亞胺和碳納米管復(fù)合材料的應(yīng)用課件

聚酰亞胺和碳納米管復(fù)合材料的應(yīng)用聚酰亞胺和碳納米管復(fù)合材料的應(yīng)用1ThepropertyofPolyimideandCNTandtheirinitialapplicationThespecificapplicationofPI/CNTcompositesSomeotheruseofPI/CNTcompositesAbstract:ThepropertyofPolyimideand2ThepropertyofPolyimideandCNTandtheirinitialapplicationThepropertyofPolyimideand3ThePropertyofPolyimideandCarobonNanotubecarbonnanotubeHighYoung’smodulusandtensilestrength.Canbemetallicorsemiconductingdependingontheirstructuralparameters.SuperiorthermalstabilityGooddielectricpropertiesGoodchemical&radiationresistanceLowthermalexpansioncoefficientHighstrengthHighflexibilityPolyimide:Carbonnanotube:ThePropertyofPolyimideand4TheAdvantageofPolymericNanocompositesTheAdvantageofPolymericNan5TheApplicationofPI/CNTcompositesinAerospaceFutureaerospacevehicleswillrequireasigni?-cantreductionofmass,sizeofcomponents,andpowerrequirements,accompaniedbyanincreaseintheintelligenceofthesecomponents.Singlewallcarbonnanotubes(SWNTs)areattractivefortheseapplicationsbecauseoftheirextraordinarycombinationofthermal,electrical,dielectric,andmechanicalproperties.TheApplicationofPI/CNTcomp6ThespecificapplicationofPI/CNTcompositesThespecificapplicationofPI7Electrostaticdischarge(ESD)Polyimidesarewidelyusedinapplicationsrangingfrommicroelectronicstoaerospace.Duetotheirinsulatingnature,significantaccumulationofelectrostaticchargemayresultontheirsurface,causinglocalheatingandprematuredegradationtoelectroniccomponentsorspacestructures.CNTPolyimideElectricalcompositeswithalevelofelectricalconductivitysufficienttopermitelectrostaticdischarge,aswellasmechanicalandthermalpropertiessuperiortothatofthebasepolymer.Electrostaticdischarge(ESD)P8Resistive-typehuminitysensorcapacitivetypehumiditysensor:useslesspowerandhasmuchbetterlinearity.Resistivetypehumiditysensor:muchsimplerandmorestraightforwardthancapacitancemeasurementsKum-PyoYoo,Lee-TaekLim,ect.Novelresistive-typehumiditysensorbasedonmultiwallcarbonnanotube/polyimidecomposite?lms.SensorsandActuatorsB:Chemical2010,145:120-125.Kum-PyoYoo,Lee-TaekLimdevelopedanovelresistive-typeRHsensorbasedonplasma-treatedmultiwallcarbonnanotube/polyimide(pMWCNT/PI)composite?lms,successfullyovercomethesedrawbacks.Theadvantageofpolyimide-basedpolymersinhumiditysensingHighsensitivityBi-directionalwatertransportResistancetomostchemicalattacksHightemperaturecapabilityCompatiblewiththeCMOSprocessThecomparisonbetweencapacitiveandresistive-typehuminitysensorhighcut-offhumidity(detectionlimit)ataround30–42%relativehumidity(RH).Resistive-typehuminitysensor9PressuresensorTheadvantageofpolyimidebasedpressuresensor:lightMechanicallydurableThermalstabilityflexibleRelativelyeasytomanufactureComparedwithpiezoelectric,magnetoresistive,optical,andacousticstressandstrainsensors,piezoresistivesensorshaveattractedparticularattentionbecausetheyarenotin?uencedbyunexpectedexternalstimulisuchasstaticchargesandmagnetic?elds.Sopiezoresistivesensorsareparticularlysuitableforaerospaceapplication.PiezoresistiveCharacteristicsofSingleWallCarbonNanotube/PolyimideNanocomposites.JournalofPolymerScience:PartB:PolymerPhysics,Vol.47,994–1003(2009)PiezoresistivecharacteristicsofMWNTnanocompositesandfabricationasapolymerpressuresensor.Nanotechnology20(2009)185503(11pp)PressuresensorTheadvantageo10flexiblecoppercladlaminated(FCCL)filmshighflexibilityhighglasstransitiontemperaturelowthermalexpansioncoefficientexcellentthermalstabilityradiationresistance.TheadvantageofpolyimideusedinFCCL:superiorthethermal,electricalandmechanicalpropertiesLowthermalexpansioncoefficientHigherdielectricconstantPI/CNTcompositesusedinFCCL:flexiblecoppercladlaminate11ActuatorAn

actuator

isamechanicaldeviceformovingorcontrollingamechanismorsystem.Ittakesenergy,usuallytransportedbyair,electriccurrent,orliquid,andconvertsthatintosomekindofmotion.-WikipediaImprovedelectromechanicalresponsesuperiormechanicalandelectricalpropertiesLightweightGoodconformabilityHightoughnessTailorableAll-OrganicActuatorFabricatedwithSingleWallCarbonNanotubeElectrodes.JournalofPolymerScience:PartB:PolymerPhysics,Vol.46,2532–2538(2008)Schematicdiagramofpreparinganall-organicactuator(crosssectionview)AprototypeactuatorfilmTheadvantageofpolymerbasedactuator:TheadditionofSWCNTsleadtosignificantenhancementoftheelectrostrictivestrainduetotheincreaseofinterfacialpolarization.exhibitssuperbactuationpropertiesandcanwithstandhightemperatureswithimprovedmechanicalintegrityandchemicalstability.Polyimide/CNTbasedactuator:ActuatorAn

actuator

isamecha12CouldPI/CNTcompositesbeusedaselectrode?AgCNTfilmsCommonmetalComparisonofCNTandcommonmetal6.06·10_9>=10_7280S·cmPI/CNT0.1%wt1.6·10_-8CouldPI/CNTcompositesbeuse13SomeotheruseofPI/CNTcompositesSomeotheruseofPI/CNTcompo14SomeotheruseofPI/CNTcompositesGasseparation(carbonmolecularsievemembranes)tribologicalsuperhydrophobicityHighthermalstabilityHighpermeabilityandselectiveExcellentgasseparationHighchemicalandwearresistanceStableinvariousharshatmosphereThermalstabilityGoodmechanicalstrengthAcomparisonofcarbon