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1、子显微镜（SEM），同时借助于数字电导仪、Image-ProPlus软件等来分析直径及其分布规律，通过扫描电子显微镜来观察纤维丝的形貌，通过能够表征直径分布的直条图直观的看出直径分布规律。关键词：多针头；静电纺丝；电场分布；数值模拟；PANIINUMERICALSIMULATIONSTUDYOFMULTI-NEEDLEELECTROSPINNINGABSTRACTEletrospinningisastraightforwardandcosteffectivemethodforfabricatingsubmicron
2、fibers.Theelectricforceusedasdrawingforceisoneofthemostremarkabledifferencesbetweenelectrospinningandtraditionaldry/wetspinning.Theelectric-fielddistributionofspinnerethasveryimportantinfluenceontheformationandtrajectoryofjets.Thereforeitisverynecessarytoresea
3、rchtheelectricfieldinelectrospinning.Tomeethighliquidthroughputrequirements,intherecentpastmulti-nozzlesystemhavebeentestedinChina.ThecomputationalsoftwareCOMSOLMultiphysicswasadoptedtosimulatetheelectricfieldofspinneret,whichcouldshowtheelectric-fielddistribu
4、tionsimplyandintuitively.Bythisway,theeffectofelectricintensityonformationoffibersisanalyzedindepth,toprovidethereferenceforindustrialproductionofelectrospinningnanofibers.Atfirst,theelectricfieldoftraditionalsingleneedleelectrospinningwassimulated,byestablish
5、ingthegeometricmodel,settingthematerialattributesofmodel,addingexcitations.Consequently,theelectric-fielddistributionwasshown.Byanalyzingtheequipot^tiallinesandvectordiagramsofelectricintensityandimageofelectricintensitycloud,combinedtheelectrohydrodynamics,it
6、wasconclusionthattheelectricintensitywasmaximumatthetipofdropletwiththemaximumsurfacechargedensity,whereelectricforcewouldovercomesurfacetensionmoreeasily,toextractedajet.COMSOLMultiphysicssoftwarewasemployedtosimulateandanalyzethemagnitudeanddistributionofthe
7、electricfieldintensityduringmulti-needleelectrospinningprocess.Systematicanalysiswasconductedonwhichthefactorssuchasthenumber,diameter,length,spacingofthespinningneedlesandappliedvoltageinfluencethemagnitudeanddistributionofthefieldintensityofeachneedle,andthe
8、theoreticalfoundationfor”endeffect”.Theresultsindicatedthatthepeakvalueoffieldintensityoccursatneedletipforsingleneedleelectrospinning,whilethepeakvalueswilloccurattheoutsidesofthe
