含氟聚合物的電紡及其應(yīng)用研究

1、Y1038231分類號：!Q32：密級：公玨UDC。學(xué)號：Q≥!魚2⑨東南大掌碩士學(xué)位論文含氟聚合物的電紡及其應(yīng)用研究研究生姓名：弛復(fù)錢導(dǎo)師姓名：奎薤控熬授申請學(xué)位級別王堂亟論文提交日期窒QQ璺壘曼啟學(xué)位授予單位塞蜜盔堂答辯委員會主席拄星夔麴援學(xué)科專業(yè)名稱絲堂王莖論文答辯日期星壘Q壁生璺且旦學(xué)位授予日期墊鰻璽旦目評閱人鹽星疆夔授弛拍墼夔攫2006年5月東南大學(xué)碩士學(xué)位論文AbstractElectrospinninghasbeenfou

2、ndtobenviabletechniquetoproducenanofibersElectrospinningoriginsfromthatelectricallychargedfluidisforcedjetsinthehighvoltageelectrostaticfield1he硒preparedfiberswithdiameterrangingfromtensofnanometerstoseveralmicrometersde

3、positerandomlytoformmatswithporesizeof0110unL1nhcmatswithhighsurfaceareaandporositymaybeappliedin銣麟suchascatalysis。filtrationtissuescaffolds，drugdeliverysystems，protectivetextiles，separatorofcellsInthispapernanofibermats

4、offluoropolymerswerepreparedbyelectmspinningandthestructures，mechanicalproperitieswatercontactanglesofthenanofibermatsforpotentialapplicationonpolymerelectrolytebarrieroflithiumpolymercellswerealsoinvestigatedFluoropolym

5、erswereelectrospunintonanofibermatsfromtheirsolutionsinthemixtureofN，Ndimethylformamide∞MF)andacetoneInfluencefactorswereanalyzedincludingconcentrationofsolution，ratinsofdifferentcomponentsofsolventflowrateanddistancebet

6、weenthecapillarytipandthecollector11lemechanicalproperitiesandhydrophobicitiesoftheelectrpspunfluoroPOlymermembraneswereexaminedTbeconcentrationofsolutionhasasingnficantinfluence011themorphologyoftheaselectrosponfibersTh

7、eresultsshowthatdiameterofthefibersincreasedwiththeconcentrationincreasingThefibermatelectrospunfromsolutionwithmixtureofDM咿andacetonewithvolu腓ratioof8：2hashomogeneousmorphologythallthatfromsolutionwithDⅣ匝usedassolventTh

8、ediameterofthefibersincreasedwi血theincreaseofflowratioThedistancebetweenthecapillarytipandthecollectorhaslittleinfluenceonthemorphologyanddistributionofdiameteroffibersPVDFfibermatshadtensilestrengthofalout20MPaPVDFTFEfi

9、bermatelectrospunfromsolutionwithconcentrationof30％hastensilestrengthof1360lⅢabutthatelectrospunfromsolutionwithconcentrationof20％hastensilestrengthof515MPaAlmostalltheelectrospunPVDFHFPfibermatshavetensilestrengthmoreth

10、an22MPaHydrophobicityoftheeleetrpspunfluoropolymermembraneswasmeasuredproperlyTberesultsrevealthattheelectrospunfluoropolymerfibermatshavethecontactanglesofover1400andhadgoodhydrophobicitieswhichisattributedtothesurfaces

11、tnlctureofnanofibermatsoffluoropolymersNanoporonsnanofibermatsoffluoropolymerwerepreparedbyncombinationofphaseseparationandelectrospianingMorphologiesofthenanoporonsnanofibermatswereobservedindetailbyfieldemissionscannin

12、gelectronmicroscope(FESEM)ThemechanicalpropefitiesofthenanoporousfibermatswerealsomeasuredTheFI三sEMimagesshowtheformationofnanoporesonthesurfaceoffluoropolymernanofibers11IemolecularweightofPVPofporogenplaysanimportantro

13、leonthesurfacestructureofnanoporonsfibersWi吐IthemolecularweightofPVPincreasing，theaveragediameterofnanoporousfibersincreasesNanoporousfluoroPOlymerfibermatswithPVPK30usedasporogenhashighesttensilestrengthnIcnanoporonsfib

14、ermatsOfPVDF冊havesimilartensilestrengthandYoung’smodulusasthecontentofPVPofporogenchangedAprimaryinvestigationwasconductedusingelectrospunfluoropolymerfibermats88electrolytebarriersforlithiumionpolymerbatteriesElectrnspu