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Sulfonated Poly (ether ether ketone)/Silica Coated Multiwalled Carbon Nanotubes Composite Membranes for Direct Methanol Fuel Cells  
Sulfonated Poly (ether ether ketone)/Silica Coated Multiwalled Carbon Nanotubes Composite Membranes for Direct Methanol Fuel Cells
資料類型: PDF文件
關(guān)鍵詞: sulfonatedpoly  (  ether  ether  ketone)  multi-walled  carbon  
nanotubes  composite  membrane  direct  methanol  fuel  cells  
資料大?。?/td> 107K
所屬學(xué)科: 分子表征
來源: 第六屆亞歐研討會上處理和性能增強聚合物會議文集(2013.6.2-6 武漢)
簡介:
Sulfonatedpoly(etheretherketone)(SPEEK)iscurrentlyconsideredtobeoneofthemostpotentialcandidatesofNafion@protonexchangemembranescl].AlthoughtheSPEEKexhibitshighprotonconductivity,itstillhasrelativelyhighmethanolpermeabilityandlowmechanicalproperties.TobalancetherelationshipbetweenprotonconductivityandmethanolbarrierandmechanicalpropertiesinSPEEK,wepreparedcompositeprotonexchangemembranescomposedofSPEEKandmulti-walledcarbonnanotubes(MWNTs)coatedbysilica(Si02).InsulatingSi02shellwascoatedonthestiffMWNTsbymeansofasimplesol-gelmethodandthenthecore/shellstructuredMWNTs@Si02wasembeddedinSPEEKmatrixtoaffordahomogeneouscompositemembrane.Thecore/shellstructureofMWNTs@Si02wasconfirmedthroughTEMandtheSi02coatingcontentwasabout40wt%determinedbyTGA.ComparedtoapureSPEEKmembrane,theMWNTs@Si02dopinginthemembranesledtoahigherthermalstabilityandglasstransitiontemperature(Tg)asrevealedbyTGAandDSC.WateruptakeandoxidativestabilityweresignificantlyincreasedbyincreasingtheMWNTs@Si02content.Moreover,thetensilestrengthandmethanolpermeabilityofcompositemembraneswereimprovedeffectivelyastheMWNTs@Si02contentlessthan2wt%.WhentheMWNTs@Si02contentincreasedt05wt%,thecompositemembranestillhasaconsiderableconductivityat0.058S/cmcomparedtothenafion117@.Thiscompositemembranewillbeapromisingcandidatefordirectmethanolfuelcellsapplications.
作者: Q. Geng, C. L. Gong, L. Cui, Y. Xial, G. W. Zheng, s. Wed
上傳時間: 2013-07-01 15:07:17
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