PEI_NaA_Al_2O_3复合支撑分子筛膜的微波水热合成

第27卷第5期2010年5月精细化工FINECHEMICALSVol.27,No.5May2010功能材料收稿日期:2010-01-25;定用日期:2010-02-04基金项目:国家自然科学基金资助项目(20976057,20876064)作者简介:袁文辉(1969-),男,博士,副教授,主要从事化工吸附分离和膜催化分离等方面的工作,E-mail:cewhyuan@scut.edu.cn。联系人:欧阳新平,E-mail:ceouyang@scut.edu.cn。PEI2NaA/α2Al2O3复合支撑分子筛膜的微波水热合成袁文辉1,陈华荣1,李莉2,欧阳新平13(1.华南理工大学化学与化工学院,广东广州510640;2.华南理工大学环境科学与工程学院,广东广州510640)摘要:采用微波水热合成法在聚醚酰亚胺(PEI)2NaA分子筛/α2Al2O3复合载体表面合成了具有高选择性的致密NaA型分子筛膜,重点考察了微波辐射时间对成膜的影响。采用X射线衍射图谱(XRD)和扫描电子显微镜(SEM)对NaA型分子筛膜进行了表征。XRD结果表明,复合载体表面生成的膜中只有NaA分子筛的晶相;SEM结果表明,复合载体基膜表面覆盖了一层致密连续的NaA型分子筛膜。合成的NaA型分子筛膜在不同质量分数乙醇中的渗透汽化性能结果表明,渗透通量随乙醇质量分数增大而减小,分离因子则反之,当乙醇质量分数为95%时,渗透通量仅0105kg/(m2·h),而分离因子高达13000。关键词:聚醚酰亚胺2NaA分子筛/α2Al2O3复合载体;NaA分子筛膜;微波水热合成;渗透汽化;功能材料中图分类号:TQ426.61文献标识码:A文章编号:1003-5214(2010)05-0421-05MicrowaveSynthesisofPolyetherimide2NaA/α2Al2O3SupportedZeoliteMembraneYUANWen2hui1,CHENHua2rong1,LILi2,OUYANGXin2ping13(1.SchoolofChemistryandChemicalEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,Guangdong,China;2.CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,Guangdong,China)Abstract:Thehigh2performanceNaAzeolitemembranewassynthesizedonpolyetherimide(PEI)2NaAzeolite/α2Al2O3compositesupportsbythemicrowaveheatingmethod.Theinfluenceofmicrowaveheatingtimeonmembranesynthesiswasmainlyinvestigated.Theas2synthesizedNaAzeolitemembraneswerecharacterizedbyXRDandSEM.XRDresultsshowthatonlyNaAzeoliteemergesonthecompositesupportsurface.TheSEMresultsshowthecompositesupportsurfaceisfullycoveredbyuniformandcompactNaAzeolitemembrane.Thepervaporationpropertiesoftheas2synthesizedmembranewereevaluatedbythedehydrationofalcohol/watermixture.Itwasfoundthatthefluxdecreasedwiththeincrementofthealcoholamountinthefeedandtheseparationfactorswerethecontrary.Thepervaporationresultspresentthattheseparationfactorswereashighas13000atm(CH3CH2OH)/m(H2O)=95∶5.Ontheotherhand,thefluxeswereonly0105kg/(m2·h).Keywords:PEI2NaAzeolite/α2Al2O3;NaAzeolitemembrane;microwavesynthesis;pervaporationseparation;functionalmaterialsFou