醋酸纤维素平板膜孔结构调控及过滤性能表征

发布时间：2018-05-07 02:01

本文选题：醋酸纤维素 + 聚乙烯吡咯烷酮　；参考：《高分子材料科学与工程》2016年05期

【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。
[Abstract]:Using polyvinylpyrrolidone (PVP) as pore forming agent acetone and N-dimethyl acetamide (DMAC) as solvent a thin and porous cellulose acetate (CA) heterogeneous flat film was prepared by solution phase inversion method. The pure water flux and dye retention and adsorption properties of the membrane were investigated. The morphology of the membrane was characterized by field emission scanning electron microscope (SEM). The effect of the content of pore-forming agent on the structure and properties of CA flat membrane was discussed. The results show that when the CA mass fraction is 8%, the CA membrane has the cortical structure of 200nm, the pure water flux is up to 230.75L/(m2 HN, and the dye rejection rate is over 97%.
【作者单位】：常州大学石油化工学院;
【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)
【分类号】：TQ051.893

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