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1、江南大學(xué)碩士學(xué)位論文聚乳酸聚乙烯醇靜電紡復(fù)合納米纖維姓名：劉亞申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：紡織工程指導(dǎo)教師：魏取福20080601AbstractAbstractTitle：PLLA／PVACompositeNanofibersbyElectrospinningMastername：LiuYaSupervisorsname：WeiQufuMajor：TextileEngineeringAsanewkindofenvironmentprote

2、ctionmaterials，poly(Llacticacid)(PLLA)hasawideapplicationinmedicine，industrynationalprotection，etal，especialllywhenitiscombinedwiththetechnologyofelectrospinningButthepoorhydrophilicitylowspeedofdegradationhaveabadeffect

3、onitsapplicationInthisarticle，poly(vinlyalcoh01)(PVA)wasusedtoimprovePLLAPLLA／PVAblendedorcompositemicro／nanofiberswerepreparedbythemeansofelectrospinningThespinningeffectandfibers’propertieswereanalyzedbyapparatusesFirs

4、tlyPLLA／PVAcompositenanofiberswerepreparedwiththeselfassembledelectrospinningequipmentinwhichtwokindsofsolutionswereblendedasthespinningsolutionThepropertechnicalparameters。whichweredeterminedbyvideozoommicroscopeandatom

5、icforcemicroscope(AFM)，wereasfollows：14％／6％oftheconcentrationratio0fPLLA／PVA，12kVofthespinningvoltage，05mL／hoftheextrudingspeed18cmofthecollectingdistanceWellshapedfiberswereobminedwiththeseparametersSomechemicalinteract

6、ionbetweenPLLAandPVAi11theblendedfiberhadbeenprovedbyinfraredspectrum(IR)TheincompatibilityofPLLAandPVAinthenanofiberswasobservedusingtappingandphasemodesofAFMButthereweregreatdifferencesamongnanofiberspreparedi11differe

7、nttimeMoredropletsandbeadsappearedinthelattercaseItmaybecausedbythechangeofenvironmentandmaterialpropertiesBecauseoftheunstabilityofthespinningresultiteouldn’trepeated，otherpreparationmethodofPLLA／PVAcompositenanofibersw

8、astakenAtwinspinneretelectrospinningequipment，whichhadtwosetsofsolutionextrudingdevicesandhighvoltagepowersuppliesandarollerasthecocollectingdevice，wassetupandthePLLA／PVAcompositemicro／nanofibershadbeenpreparedwithtwokin

9、dsofsolutionsspinningseparatedlyAfteranalyzingtheimagesofvideozoommicroscopeandscanningelectronmicroscope(SEM)，themostsuitabletechnicalparameterswerelistedasfollows：PLLAsolution，concentration30％，voltage15kVextrudingspeed

10、10，08，05，02mL／h，collectingdistance15era；PVAsolutionconcentration10％，voltage18kVextrudingspeed02mL／kcollectingdistance15cm；rotatingspeedoftheroller200r／minAndthestructure，diameterdistributionandsurfaceroughnessofnanofiber

11、swereanalyzedbySEMandAFMThemechanicalpropertyofcompositenanofibermatswasanalyzedbytensiontestandforcedistancecurvesPLLA10mL／hshowedthebestmechanicalpropertyandPLLAO5mL／hwastheworstPLLAgotabetteradhesiveabilitythanPVAdidC

12、ompositenanofibermatshadagreatimprovementonthewettabilitycomparingwiththepurePLLAnanofiberm鞏whichwasprovedbyt11etestsofstaticcontactangleanddynamicwateradsorptionPLLAO2mL／hwasthebestSomeimprovementsonthethermalstabilityo

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