基于树状分子聚酰胺_胺_PAMAM_的复合纳滤膜制备及性能研究

高校化学工程学报JournalofChemicalEngineeringofChineseUniversities文章编号：1003-9015(2012)-基于树状分子聚酰胺-胺(PAMAM)的复合纳滤膜制备及性能研究金丽梅1,2,于水利3.1,时文歆1,衣雪松1,马聪1,孙楠1(1.哈尔滨工业大学市政环境工程学院城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090;2.黑龙江八一农垦大学食品学院,黑龙江大庆163319;3.同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海200092)摘要：以聚砜超滤膜为支撑膜，通过聚酰胺-胺(PAMAM，G0)与均苯三甲酰氯(TMC)的界面聚合反应制备复合纳滤膜。首先优化了界面聚合过程，并通过场发射扫描电子显微镜(FESEM)进行了膜的表面形貌分析，最后考察了纳滤膜对Na2SO4、不同分子量聚乙二醇及小分子有机物的分离性能。结果表明：较优的纳滤膜制备条件为：PAMAM浓度0.25%(wt)，TMC浓度0.3%(wt)，界面聚合时间90s，热处理温度60℃。FESEM分析表明经界面聚合反应后，超滤膜表面形成了一层致密的活性层。随着操作压力的增加及Na2SO4浓度的降低，膜对盐的截留率均不断增大。复合纳滤膜可有效截留盐，且其截留分子量处于600~1000gmol1。关键词：聚酰胺-胺；PAMAM；界面聚合；纳滤膜中图分类号：TB43；TB383；TQ028.8文献标识码：APreparationandPerformanceofCompositeNanofiltrationMembraneSynthesizedfromPoly(amidoamine)(PAMAM)JINLi-mei1,2,YUShui-li3.1,SHIWen-xin1,YIXue-song1,MACong1,SUNNan1(1.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.SchoolofFoodScience,HeilongjiangBayiAgriculturalUniversity,Daqing163319,China;3.StateKeyLaboratoryofPollutionControllandResourcesReuse,CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China)Abstract:CompositeNFmembraneswerepreparedbyinterfacialpolymerizationofpoly(amidoamine)(PAMAM,G0)andtrimesoylchloride(TMC)onthesubstrateofPSFUFmembrane.TheinterfacialpolymerizationprocesswasoptimizedandtheperformanceofthemembranewascharacterizedwithFESEM,thentheresultedNFmembraneswereusedtoseparateNa2SO4,PEGwithdifferentmolecularweightandsmallorganicmolecules.TheexperimentalresultsindicatethattheoptimalpreparationconditionsarePAMAMconcentration0.25%(wt),TMCconcentration0.3%(wt),interfacialpolymerizationtime90s,heattreatmenttemperature60℃.AsindicatedbyFESEM,selectivelayerofPAnanofiltrationisformedonthesubstratelayerwhichisthinanddenseafterinterfacialpolymerization.TherejectionincreaseswiththeincreaseofoperatingpressureanddecreaseswiththeincreaseofNa2SO4concentration.TheNFmembranecaneffectivelyrejectsaltionsandthecut-offmolecularweight