预览加载中，请您耐心等待几秒...

溶液喷射纺PAN微纳米纤维宏量制备及其性能研究.docx

预览
1/3
2/3
3/3

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

溶液喷射纺PAN微纳米纤维宏量制备及其性能研究 Title:PreparationandCharacterizationofPANMicro/NanofibersviaSolutionSpinningforMacroscopicQuantities Abstract: Polyacrylonitrile(PAN)micro/nanofibershavegainedsignificantattentioninvariousfieldsduetotheirexcellentmechanicalproperties,highsurfacearea,andpotentialapplicationsinfiltration,tissueengineering,andenergystorage.ThisstudyinvestigatesthemacroscopicpreparationandcharacterizationofPANmicro/nanofibersthroughsolutionspinningtechnique.Theeffectsofspinningparametersonfibermorphology,mechanicalproperties,andchemicalstructureareexplored.TheobtainedPANfibersexhibitpromisingproperties,makingthemattractiveforawiderangeofapplications. 1.Introduction Polyacrylonitrile(PAN)fibersarewidelyusedduetotheirexceptionalmechanicalpropertiesandthermalstability.Micro/nanofibersobtainedfromPANareofparticularinterestduetotheirhighsurfacearea,porousstructure,andcontrollablearchitectures.SolutionspinningisoneofthemostcommonmethodsforPANfiberfabrication,offeringasimpleandscalablerouteforproducingmacroscopicquantitiesofmicro/nanofibers.ThisstudyaimstoexplorethepreparationofPANmicro/nanofibersusingthesolutionspinningtechniqueandinvestigatetheirpropertiesforpotentialapplications. 2.Experimental 2.1Materials Polyacrylonitrile(PAN),dimethylformamide(DMF),andotherrequiredchemicalswereobtainedfromreputablesuppliers. 2.2SolutionSpinningProcess ThePAN/DMFsolutionwaspreparedbydissolvingPANinDMFataspecificconcentration.ThespinningprocessinvolvedthecontinuousextrusionofthePAN/DMFsolutionthroughasyringepump,followedbyair-gapattenuationandelectrostaticfieldstretching.Finally,thefiberswerecollectedonarotatingdrumorinacoagulantbath. 3.ResultsandDiscussion 3.1FiberMorphology ThemorphologyofthePANmicro/nanofiberswascharacterizedusingscanningelectronmicroscopy(SEM).Theeffectsofspinningparameterssuchassolutionconcentration,spinningrate,andsolutiontemperatureonfibermorphologywereinvestigated.Itwasfoundthatlowersolutionconcentrationandhigherspinningratesledtotheformationofthinnerfibers