氮杂萘酮结构聚醚酮的改性及其用于燃料电池聚电解质膜的研究

《氮杂萘酮结构聚醚酮的改性及其用于燃料电池聚电解质膜的研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、浙江大学博士学位论文最后，由氯甲基化／季铵化改性的PPEK得到的碱性QPPEK膜甲醇渗透系数为7．21×10～em2／s，比Nationll7膜的甲醇渗透系数低3倍，阴离子传导率最大为1．14×10之S／era，基本满足低温碱性聚电解质膜燃料电池的工作需要。关键词：二氮杂萘酮结构聚醚酮，磺化，掺杂，季铵化，质子传导率，阴离子传导率，甲醇透过性，聚电解质膜，燃料电池Ⅱ浙江大学博士学位论文ABSTRACTPoly(phthalazinoneetherketone)(PPEK)isanewkindofhighperformancepolymerandhasexcel

2、lentmechanicalproperties，thermalstability，chemicalandoxidativeresistance．TheaimofthisworkistomodifyPPEKbymeansofsulfonation,chloromethylation／quaternization,dopingsulfonatedPPEKwithinorganicparticlessuchascesiumhydrogensulfate(cS)，zirconiumhydrogenphosphatehydrate(ZrP)and12-phosphot

3、ungsticacid(PWA)，topreparepolymerelectrolytemembranesOaEM)forfuelcells，andtostudytherelationshipbetweerlstructureandpropertiesofthepolymerelectrolytemembranes．Firstly,thesulfonatedPPEKs(SPPEKs)weresynthesizedbyreactingPPEKwith98％concentratedsulfuricacidor98％concentratedsulfuricacida

4、ndchlorosulfonicacidmixtureunder80-100℃．ThepresenceofsulfonicacidgroupsinSPPEKsWasconfirmedbyFouriertransforminfraredanalysis，EnergyDispersiveX—Rayand1HNMRspectrum．Theoptimumreactionconditionswas59PPEKinthemixtureof70mlconcen仃atedsulfuricacidof98％and10mlchlorosulfonicacidat90"Cfor3h

5、．1rI圮methanolpermeabilityofSPPEKmembraneWas1．07X10-7cm2／s，whichWasabout20timeslowerthanthatofNation117(2．39x10正cm2s．1)undersimilarcondition．TheSPPEKmembraneshowedthehighestprotonconductivityof3．12X102S／cmat95’C．whichWasintherangeneededforthehighperformancefuelcellPEM．Secondly，theinc

6、orporationofthePWAintotheSPPEKmembranedidnotdamagethethermalstabilityandmechanicalpropertiesofthePWA／SPPEKhybridmembranesbadly．Themethanolpermeabilityofthehybridmembranecontaining10wt％PWA(MPl0)Was1．02×10。7emZ／s,whichWasabout20timeslowerthanth砒ofNailon117undersimilarcondition．MPl0sho

7、wedthehighestprotonconductivityof0．17S／emat80。C，whichWashigherthanthatofNationl17(o．I1S／cm)．Themethanolpermeabilitiesofa-ZrP／SPPEKhybridmembranepreparedfromswell-dippingmethod(Mz5)anddirectblendingmethod(MzlO)were1．52×10"Tand1．74X10。7cm2s-Irespectively．Thehighestprotonconductivities

8、ofMz5andMzlowerg7．6