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1、UniversityofScienceandTechnologyofChinaAdissertationforDoctor’SdegreePreparationofAnionExchangeMembranesforElectrodialysisandFuelCellAuthor’SName：MOHAMMADMASEMHOSSAINSpeciality：AppliedChemistrySupervisor：ProfessorTongwen
2、XuFinishedtime：20l605O1AbstractAbstractAlkalinefuelcells(AFCs)areoneofthemostpromisingcleanenergytechnologiesunderdevelopmentOntheotherhand，Electrodialysis(ED)isusedfortheproductionofultrapurewater，thehighlyproficientdes
3、alinationofbrackishwater，watersofteningandtheremovalofotherchargedcontaminationsfromwaterstreamsHowever，thosewillrequirechemicallystableionexchangemembranes(IEMs“)tomakeStilelongperformancelifetimesOurpresentresearchemph
4、asesondevelopingdifferentpolymersystems(semiinterpenetratingpolymer，side—chaintypedenselyfunctionalized，and／orcross1inkedpolymers)inordertorealizemembraneinmanyfeaturesanddesignimprovedAEMswithbetterionicconductivity，mec
5、hanicalintegrityandalkalinestabilityAseriesofbrominatedpoly(2，6dimethylphenyleneoxide)(BPPO)basedcrosslinkedAEMscontainingclusteredoftetraalkylammonium(TAA)groupsatsidechainwerepreparedbyattachinganovel(tris[2(dimethylam
6、ino)ethyl]amineonpolymerbackboneviaMenshutkinreactionfollowedbymethylationresultinganovelclassofionomerscontainingclustersoffourquaternaryaminegroupsperrepeatunitatsidechainThemembranesformedwererobustandtransparentThere
7、sultssuggestthatthetacticofclusteringTAAgroupsatsidechaintoproduceAEMcanmitigatewaterswellingenhancehydroxideconductivityandimprovethestabilityofquatemaryammoniumgroupsinAEMsMoreover，wehavesynthesizedcrosslinkedmembranev
8、iaasimpleandfacilewaybyimmersinghalogenatedpolymeric(BPPO)membraneintodimethylaminesolutionatroomtemperature，withgreatefficiencyThusthemembranesformedweretransparentandflexibleTheyhavegoodmechanicalpropertiesandlowwateru
9、ptakesbutgoodhydroxideionconductivitiesFurthermore。thealkalinestabilityofxCTPPOYmembranesshowednearlynochangeinhydroxideconductivityandindicatedthatthesemembranesaregoodcandidatesforuseinalkalinefuelcellsAlso，wehaveprepa
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