学科分类
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23 个结果
  • 简介:对Escherichiacoli和克积极的葡萄球菌aureus微生物的polyaniline(PAni)的优秀抗菌剂性能在黑暗、可见的轻条件下面被表明了。在PAni分子和细菌之间的静电的坚持可以为PAni的抗菌剂反应起一个很重要的作用,由于我们的调查,进行PAni,它的composites/blends被相信作为抗菌剂代理人的一种新类型有用,为改进人的健康和生活环境的自我清洗以及多功能的材料。

  • 标签: 聚苯胺 导电聚合物 抗菌效果 大肠杆菌 生物材料
  • 简介:Watersolubleconductingpolyanilinewithelectricalconductivityof10-1-10-2S/cmwaspreparedemployingdopantinducedwatersolubilitytechnology.Thewaterresistanceoftheconductingfilmwassignificantlyimprovedemployingsol-gelhybridsmethod,especiallywhentheconductivepolyanilineloadingwasbelow30wt%.Thereasonfortheimprovementisthattheconductingpolyanilinechainsareconfinedinastableinorganicnetwork.

  • 标签: 聚苯胺 溶胶-凝胶混合 无机网络 防水性 稳定性
  • 简介:Thefiniteelementformulationforanalyzingstaticdamagenearaconductingcrackinathinpiezoelectricplateisestablishedfromthevirtualworkprincipleofpiezoelectricity.Thedamagefieldsundervariousmechanicalandelectricalloadsarecalculatedcarefullybyusinganeffectiveiterativeprocedure.Thenumericalresultsshowthatallthedamagefieldsaroundacracktiparefan-shapedandtheelectricfieldappliedhasgreatinfluenceonthemechanicaldamage,whichisrelatedtothepiezoelectricproperties.

  • 标签: 压电陶瓷 非线性有限元方法 机械损伤 电损伤 导电裂缝
  • 简介:电容表演poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT-PSS)超分子的hydrogels系统地被调查了。材料显示出67F/g的一个特定的电容并且在周期的voltammogram大小象5000mV/s一样高以扫描率显示优秀的率能力,由好周期稳定性伴随了。根据microscale形态学,特定的区域和电的传导性的大小,为电气化学的性质的改进的机制被讨论并且归功于到hydrogels的新奇多孔的微观结构和僵硬PEDOT和软PSS部件的合作效果。而且,polyaniline(平底锅)通过一个界面的聚合过程与PEDOT-PSShydrogels被加重,赋予hydrogel材料以以5000mV/s的扫描率的160F/g的一个更高特定的电容。这个工作的意义躺在一个新奇方法的示范解决在电气化学的应用进行聚合物的问题。

  • 标签: 导电聚合物 电容性能 分子凝胶 循环稳定性 电化学性能 PEDOT
  • 简介:

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  • 简介:Asimplifiedclosed-formanalyticsolutionforUWBimpulsesignaltransmittingthroughafinitelyconductingslabisproposed.Theapproachfirstrequiresevaluatingtheimpulseresponseoftheslabandthenconvolvingitwiththespecifiedincidentfieldwaveform.Toobtaintheimpulsivetransmittingfield,eitherforverticalorhorizontalpolarization,approximationstotherefractioncoefficientsandpropagationlossaremade,whichcanbeprovedtobeaccurateenough,comparingwiththeirfrequencydomainsolutions.Thereby,itpermitssimplifiedclosed-formexpressionsinthetimedomainforbothterms.Theresultingtransientresponseforthetransmittingimpulsefieldisthengivenbyconvolutionofthetimedomainrefractioncoefficientsandtimedomainpropagationloss.Anumericalexampleofanincidentmonocycletransmittingthroughaslabusingthistechnique,ispresented,toillustratetheeffectiveuseofthemethod.

  • 标签: 超宽带 时间域 室内传播通道 多路径
  • 简介:Inco-ionicconductingsolidoxidefuelcell(SOFC),bothoxygenion(O2)andproton(H+)cantransportthroughtheelectrolyte,generatingsteaminboththean-odeandcathode.ThusthemasstransportphenomenonintheelectrodesisquitedifferentfromthatinconventionalSOFCwithoxygenionconductingelectrolyte(O-SOFC)orwithprotonconductingelectrolyte(H-SOFC).Thegenerationofsteaminbothelectrodesalsoaffectstheconcentrationover-potentiallossandfurthertheSOFCperformance.However,nodetailedmodelingstudyonSOFCswithco-ionicelectrolytehasbeenreportedyet.Inthispaper,anewmathematicalmodelforSOFCbasedonco-ionicelectrolytewasdevelopedtopredictitsactualperformanceconsideringthreemajorkindsofoverpotentials.Ohm'slawandtheButler-Volmerformulawereusedtomodeltheionconductionandelectrochemicalreactions,respectively.Thedustygasmodel(DGM)wasemployedtosimulatethemasstransportprocessesintheporouselectrodes.Parametricsimulationswereperformedtoinvestigatetheeffectsofprotontransfernumber(tH)andcurrentdensity(jtotal)onthecellperformance.Itisinterestingtofindthattheco-ionicconductingSOFCcouldperformbetterthanO-SOFCandH-SOFCbychoosinganappropriateprotontransfernumber.Inaddition,theco-ionicSOFCshowssmallerdifferencebetweentheanodeandcathodeconcentrationoverpotentialsthanO-SOFCandH-SOFCatcertaintHvalues.TheresultscouldhelpmaterialselectionforenhancingSOFCperformance.

  • 标签: 固体氧化物燃料电池 离子导电 电解质 数学分析 质量传递过程 电池性能
  • 简介:MethodofVSC(VoltageShortedCompaction)canbeusedtodeterminetheintrinsictemperaturedependenceofconductivityofpolycrystallinecompaction.TheexperimentalconditionsandtechnicalkeyforpreparationofVSCdeviceanditsphysicalmodelaswellasitsapplicationsinconductingpolymersarediscussedindetail.

  • 标签: silver PASTE terminals Probe INTRINSIC COMPACTION
  • 简介:Numericalsimulationsareperformedforlaminarnaturalconvectionheattransferfromacenteredconductingbodyenclosedinasquarecavity.Ahighaccuracyunsteadynumericalmethodisused,combiningtheuniqueconditionofthepressure,theconvergentsolutionsandthestream-functionvalueoftheinsideheat-conductingbodyaregivensimultaneously.Twoexamplesaresimulatedwiththisnumericalmethodandcomparedwiththeexperimentalresults.Theresultsofthenumericalsolutionsareconsistentwiththeexperimentalresults.Itshowsthatthenumericalmethodisvalidandfeasible.

  • 标签: 热量转移 自然对流 热传导 固体 流程控制
  • 简介:Significantenhancementofthermoelectricper-formancewasobservedforPoly(3,4-ethylene-dioxythiophene):Poly(4-styrenesulfonic)(PEDOT:PSS)andmulti-walledcarbonnanotubes(MWCNTs)(PC)three-dimensionalaerogelswhichwereobtainedfromPEDOT:PSS/MWCNTssuspensionsbyaddingdifferentconcentrationsof

  • 标签: 英语 阅读 理解 复合材料
  • 简介:有磅(50%)的polythiophene/polyoxymethylene-blend的Electrorheological性质和爬恢复行为/POM(50%)作文被调查。粒子尺寸,电导率和绝缘的价值被测量是24.77m,3.85獩爠慥瑣潩?湩琠敨物映敩摬

  • 标签: 混合悬浮 弹性行为 聚噻吩 蠕变 导电 电场强度
  • 简介:Aseriesofnovelamphibiousorganic/inorganichybridprotonexchangemembraneswithH3PO4dopedwhichcouldbeusedunderbothwetanddryconditionswaspreparedthroughasol-gelprocessbasedonacrylatedtriethoxysilane(A-TES)andbenzyltetrazole-modifiedtriethoxysilane(BT-TES).Thedual-curingapproachincludingUV-curingandthermalcuringwasusedtoobtainthecrosslinkedmembranes.Polyethyleneglycol(400)diacrylate(PEGDA)wasusedasanoligomertoformthepolymericmatrix.Themolecularstructuresofprecursorswerecharacterizedby1H,13Cand29SiNMRspectra.Thethermogravimetricanalysis(TGA)resultsshowthatthemembranesexhibitacceptablethermalstabilityfortheirapplicationatabove200oC.Thedifferentialscanningcalorimeter(DSC)determinationindicatesthatthecrosslinkedmembraneswiththemassratiosofbelow1.6ofBT-TEStoA-TESandthesamemassofH3PO4dopedasthatofA-TESpossessthe-Tgs,andthelowestTg(-28.9℃)existsforthemembranewithdoublemassofH3PO4dopedaswell.Thehighprotonconductivityinarangeof9.4―17.3mS/cmwiththecorrespondingwateruptakeof19.1%―32.8%ofthemembraneswasdetectedat90oCunderwetconditions.Meanwhile,theprotonconductivityinadryenvironmentforthemembranewithamassratioof2.4ofBT-TEStoA-TESanddoubleH3PO4loadingincreasesfrom4.89×10-2mS/cmat30℃to25.7mS/cmat140℃.Theexcellentprotontransportabilityunderbothhydrousandanhydrousconditionsdemonstratesapotentialapplicationinthepolymerelectrolytemembranefuelcells.

  • 标签: 复合质子交换膜 有机/无机 导电行为 聚合物电解质膜燃料电池 制备 三乙氧基硅烷
  • 简介:Differentoxygenandnitrogencontainingfunctionalgroupswerecreatedonthesurfaceofthemultiwalledcarbonnanotubes.Themulti-walledcarbonnanotubesweretreatedinultrasonicbathwithsulfuricornitricacid.Furthermorethesurfacetexturewasmodifiedbyincreaseoftheroughness.Inparticularaftertreatmentwiththeoxidizingnitricacid,incomparisontotheH_2SO_4orultra-sonictreatedsamples,cratersandedgesaredominatingthesurfacestructures.Manganeseoxidewasdepositedonthemultiwalledcarbonnanotubesbyprecipitationmechanism.Variousmanganeseoxidesareformedduringthedepositionprocess.Thesampleswerecharacterizedbyelementalanalysis,microscopy,thermalanalysis,Ramanspectroscopy,andbythezetapotentialaswellasX-raydiffractionmeasurements.Itwasshownthatthedepositedmanganeseoxidesarestabilizedratherbysurfacetextureofthemulti-walledcarbonnanotubesthanbycreatedfunctionalgroups.

  • 标签: 多壁碳纳米管 预处理程序 催化剂载体 氧化锰 X射线衍射测量 含氮官能团