聚砜-纤维素复合超滤膜材料的制备与表征  

Preparation and Characterization of PSF-cellulose Composite Ultra-filtration Membrane

作　　者：张力平[1] 陈国伟[1] 唐焕威[1] 王思群[2] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083 [2]美国田纳西大学林产品研究中心,诺克斯维尔37996

出　　处：《生物质化学工程》2008年第1期11-16,共6页Biomass Chemical Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2002AA322060)

摘　　要：以聚砜为原材料,通过向铸膜液中混入纤维素微纳晶体,采用浸没沉淀相转化工艺制备了纤维素填充聚砜基复合超滤膜材料。通过正交试验分析了各因素对产品性能的影响并得出了制备复合超滤膜的最优条件:当聚砜质量分数为18%,添加剂聚乙烯吡咯烷酮(PVP K30)为0.3%,纤维素微纳晶体加入量为聚砜质量的15%,空气中溶剂蒸发时间为10 s,然后在凝胶浴水中凝胶成形。并测定复合超滤膜的水通量、截留率、平均孔径、孔隙率、强度等一系列性能,膜的水通量为152.72 L/(m2.h),截留率为93.98%,孔隙率为63.22%,平均孔径为46.03 nm,膜具有良好的综合性能。The composite ultra-filtration membrane with polysulfone（PSF） as main body and micro/nano-crystal cellulose as filling was prepared in phase-inversion process by adding micro/nano-crystal cellulose into the PSF casting solution. Through the orthogonal experiment we get the optimal process conditions： the PSF content（wt） is 18 %, the additive content of PVP K30 is 0.3 % , the micro/nano-crystal cellulose added is 15 % of the PSF mass, the solvent evaporation time in the air is 10 seconds, the coagulation bath medium is water. The properties such as pure water flux, rejection ratio, mean pore size, porosity and tensile strength of the composite membrane were tested. In this condition, the composite membrane＇s pure water flux can reach 152.72 L/（m^2·h）, the rejection ratio of the bovine serum albumin （BSA） solution （lg/L） is 93.98 %, the porosity is 63.22 % and the mean pore size is about 46.03 nm. The composite membrane has a good filtration performance.

关 键 词：复合超滤膜 聚砜 纤维素微纳晶体 水通量 

分 类 号：TB383.2[一般工业技术—材料科学与工程]