摘要
用聚乙烯醇缩丁醛(PVB)作为本体高分子材料,用浸没沉淀相转化法制备PVB不对称超滤膜;扫描电镜照片显示所制膜的超滤结构.研究了PVB本体浓度、制膜间隙、凝胶浴温度以及乙酸添加剂等因素对PVB不对称超滤膜性能的影响;比较了乙酸及聚乙烯基吡咯烷酮(PVP)作为添加剂对大孔径PVB超滤膜皮层结构的影响.当PVB本体浓度为12%时,膜的纯水通量及牛血清白蛋白(BSA)溶液通量分别为876.4 L/(m2.h)和89.8 L/(m2.h),此时膜对BSA的截留率为96.8%;PVB膜纯水通量随着制膜间隙的增加及凝胶浴温度的上升而降低;乙酸及PVP的添加均提高了PVB超滤膜的纯水通量,通量增加幅度分别为136%和171%.
Poly （vinyl butyral） （PVB） ultrafiltration membranes were prepared by immerged phase - inversion process. Through SEM photographs, it could be found that PVB membranes with macropores were successfully prepared. Effects of concentration of PVB, clearance of scraper, temperature of gelling bath and concentration of acetic acid additive on membrane performance were investigated. The influence of acetic acid and poly（vinyl pyrrolidone） （PVP） on morphology of the top layer of PVB membranes was also studied. When PVB concentration was 12%, the pure water flux of PVB membrane was about 876.4 L/（m^2·h）, the flux and rejection of Bovine Serum Albumin（BSA） solution is about 89.8 L/（m^2·h） and 96.8% respectively; pure water flux of PVB membrane decreased as the increase of clearance of scraper and temperature of gelling bath; the addition of acetic acild and PVP increased the pure water flux of PVB membranes, and the increasing extent of pure water flux were 136 % and 171% respectively.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2005年第6期59-63,共5页
Membrane Science and Technology
关键词
聚乙烯醇缩丁醛(PVB)
超滤膜
浸没沉淀相转化法
膜制备
poly（vinyl butyral）（PVB）
ultrafiltration membrane
immerged phase-inversion process
membrane preparation
