摘要
以聚乙烯吡咯烷酮(PVP)作为成孔剂,丙酮和N,N-二甲基乙酰胺(DMAc)为溶剂,采用溶液相转化法制备了皮层超薄且支撑层具有大量孔隙结构的醋酸纤维素(CA)非均质平板膜。对膜的纯水通量、染料截留吸附性能进行了考察,并通过场发射扫描电子显微镜对膜形貌进行了表征,讨论了成孔剂的含量对CA平板膜结构与性能的影响。结果表明,当CA质量分数8%,m(PVP)/m(CA)=23/100,V(溶剂丙酮)∶V(DMAc)=1∶1时,制备的CA膜具有200nm的皮层结构,其纯水通量可达230.75L/(m2·h),对染料截留率保持在97%以上。
A surface layer cellulose acetate（CA）flat film with numbers of porous structure was prepared by phase inversion processing.In this method,polyvinylpyrrolidone（PVP）was used as pore-forming agent,acetone and N,N-Dimethylacetamide（DMAc）were used as solvent.Pure water flux and dye rejection properties of the film were investigated.Meanwhile,the morphology of the film was characterized by field emission scanning electron microscopy.The effect of the content of the pore-forming agent on structure and property of CA flat film were also discussed.The results show that the CA concentration at 8%,amount of m（PVP）/m（CA）=23/100,and V（acetone）∶V（DMAc）=1∶1,a thin film surface with 200 nm thickness could be obtained.The pure water flux is up to 230.75L/（m2·h）and the dye rejection rate remains above 97%.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2016年第5期81-86,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金青年基金资助项目(21404016
51103016)
生态纺织教育部重点实验室(江南大学)(KLET1304)
江苏省高校自然科学研究面上项目(15KJB430003)
关键词
醋酸纤维素
聚乙烯吡咯烷酮
平板膜
结构调控
过滤
cellulose acetate
polyvinylpyrrolidone
flat film
structure controlling
filtration
