氯甲基化聚砜聚砜共混超滤膜的制备

第卷第期中南大学学报自然科学版395()Vol.39No.52008年10月J.Cent.SouthUniv.(ScienceandTechnology)Oct.2008氯甲基化聚砜/聚砜共混超滤膜的制备谭翎燕1，谭群燕2，张浩勤1，陈卫航1，刘金盾1(1.郑州大学化工学院，河南郑州，450001；2.华北水利水电学院机械学院，河南郑州，450011)摘要：以氯甲基化聚砜(CMPSF)和聚砜(PSF)为膜材料，以聚乙二醇(PEG600)为添加剂，采用L-S相转化法制备CMPSF/PSF共混超滤膜。对CMPSF/PSF共混膜进行季铵化探索，并通过扫描电镜观察膜的断面结构。运用均匀设计方法安排实验，用SPSS软件进行数据处理，得到水通量的回归方程。通过单因素影响模拟计算，考察共混比、聚合物浓度、添加剂浓度和挥发时间等制膜条件对水通量的影响。研究结果表明，最优制备参数是：聚合物总浓度为22%，共混比(m(CMPSF)/m(PSF))为1/4，添加剂含量为6%，蒸发时间为90s。CMPSF/PSF共混超滤膜的水通量为195.3L/(m2·h)，在操作压力为0.2MPa时对聚乙烯醇PVA(相对分子质量为31000~50000)的截留率为99.5%；CMPSF/PSF共混膜季铵化后水通量降低，截留率变化不大；CMPSF/PSF共混膜断面形态属于典型的非对称指状孔结构，季铵化后膜发生了溶胀。关键词：氯甲基化聚砜(CMPSF)/聚砜(PSF)；超滤膜；共混；均匀设计中图分类号：TQ028.8文献标识码：A文章编号：1672−7207(2008)05−0928−06Preparationofchloromethylatedpolysulfone/polysulfoneblendultrafiltrationmembraneTANLing-yan1,TANQun-yan2,ZHANGHao-qing1,CHENWei-hang1,LIUJin-dun1(1.SchoolofChemicalEngineering,ZhengzhouUniversity,Zhengzhou450001,China;2.SchoolofMechanicalEngineering,NorthChinaUniversityofWaterConservancyandElectricPower,Zhengzhou450011,China)Abstract:Withchloromethylatedpolysulfone(CMPSF)andpolysulfone(PSF)asmembranematerials,polyethyleneglycol600asadditive,CMPSF/PSFblendultrafiltrationmembranewaspreparedbyL-Sphaseinversion.Inaddition,apreliminaryexplorationonthequaternizationofCMPSF/PSFblendmembranewasalsodeveloped.Thecrosssectionofmembranewasobservedwithscanningelectronmicroscope.TheuniformdesignwasappliedtothefabricationofthemembraneandtheexperimentaldatawereprocessedbySPSSsoftware.Theregressionequationoffluxeswasestablishedbymeansofregressionanalysis.TheinfluencesofthepreparingconditionsoftheCMPSF/PSFmembrane,suchasblendingratio,thetotalpolymerconcentration,theadditiveconcentrationandevaporatedtimeetc.onthefluxofCMPSF/PSFmembranewereinvestigatedbysinglefactorsimulateanalysis.Theresultsshowthattheoptimalpreparationparametersarethetotalpolymerconcentration22%,blendingratio(m(CMPSF)/m(PSF))1/4,additivecontent6%andevaporationtime90s.ThefluxoftheCMPSF/PSFblendultrafiltrationmembraneis195.3L/(m2·h)and99.5%rejecti