聚乙烯醇聚离子膜材料的合成及表征

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1、济南大学硕士学位论文聚乙烯醇聚离子膜材料的合成及表征姓名：秦怀侠申请学位级别：硕士专业：化学工艺指导教师：孟平蕊;李良波20050525、1∥丫／丫丫丫、、／、丫OH9OHoOH6O’Hm№寸洲出。苜附＆。＼∥、∞0HI．POAPVAII．SLAPVA111．PTAPVA、／＼r丫7丫、r丫OH0．OH0OHeH2COONaCH2CH(OH)CH2N(CH3)3cliV．CMAPVAV．QACPVA系统地研究了反应温度、反应时间、反应物用量、催化剂用量及PVA水溶液浓度等因素对取代度的影响。2．聚阴、聚阳离子膜材料化学结构的表征及性能测试用红外光谱和扫描

2、电镜对聚阴、聚阳离子膜材料的结构进行了表征，分别测定了它们的在水和不同浓度乙醇中的溶胀情况、热稳定性能及导电性能。3．聚离子复合物的制各及性能测试将各种聚阴离子分别与季铵盐烷基醚化阳离子PVA通过离子反应形成聚电解质复合物，初步探讨了聚阴、聚阳离子比例对聚电解质复合物在95％乙醇中溶胀性能的影响。测定了POAPVA、CMAPVA、QACPVA以及POAPVA／QACPVA、CMAPVA／QACPVA聚电解质复合物膜材料的渗透汽化分离性能。关键词：聚阴离子PVA聚阳离子PVA聚电解质复合物渗透汽化膜分离ABSTRACTRecently，pervaporat

3、ionseparationtechnologyhasgainedmuchattentiontoseparateorganicmixturesduetoitshighseparationefficienciescoupledwithenergysavingsandconvenientoperating，especiallyforthecloseboilingpointandazeeotropicmixtures．Thekeyofmembraneseparationtechnologyistopreparemembranematerialwithhi【曲pe

4、rmeationfluxandgoodseparationfacter．Poly(vinylalcohol，PVA)isapossiblecandidateforthedehydrationprocessofaqueousorganicmixturesbecauseofitSgoodfilmformingabilityandhighselectivityofwatertoalcohols，exceptforitspoorstabilityinhightemperatureaqueoussolution．Therefore．PVAmustbejnsolub

5、ilizedbycrosslinkingorothermodificationreactionstocreateastablemembranewithgoodmechanicalpropertiesandselectivepermeabilitytowater．ThePvAmembrane．bycrosslinkingwithformaldehyde，hashighpermeationflux．Butitsproduceprogressespolluteworsely．Theester-linkingPVAmembranehashighseparatio

6、nfacterandIOWpermeationflux．Therefore．theiruseis1imitted．Polyioniccomplex(polyelectrolytecomplex)membrane，anovelpervaporationmembranematerial，whichhashighpermeationflux，goodseparationfatterandpol／uteless，isahottopictoday。Inthispaper,fivenoveldifierentdegreeofsubstitutionpolyionic

7、electrolytesweresynthesizedSuCcessfullywithmonochloroaceticacid，phosphoricacid，sulfonicacid，phthalicanhydrideandquatemaryammoniumsaltasmodificationagents，respectively．Thepolyionicelectrolytes’structurewerecharacterizedbyIRspectroscopyandSEM．Theswellingability，thermalstabilityandc

8、onductivitywereinvestigated，too．Atlast，p