以聚砜(PSF)为膜材料,水为凝胶剂,采用浸没沉淀相转化法制备PSF 超滤膜,在制膜过程中添加亲水性聚合物聚乙烯基吡咯烷酮(PVP)和络合剂FeCl2,改变PSF 膜的亲水性,并对其性能进行表征。通过对PSF 膜的共混改性制备低分子截留超滤膜。分析了铸膜液温度、凝胶浴温度及支撑层对PSF 膜性能的影响,通过控制实验条件,制备出截留分子量为2000~10000 的超滤膜。
A new type of ultrafitration membrane with small molecular weight cut-off (MWCO), with PSF, with DMAC, with polyvinyl pyrrolidone (PVP) and FeCl2 as its raw materials, is prepared by means of the phase inversion method. The morphology of the membrane is controlled by adjusting the temperature of the casting solution, the temperatures of the coagulation bath and the support layer of membrane. The prepared ultrafitration membrane intercepts the matter of molecular weight: 2000-10000 with the interception rate of PEG of over 90% under the controlled process condition.
[1] 王铮, 戴海平, 王建臣. 高截留能力中空纤维超滤膜研制[J]. 净水技 术, 2000, 18(2): 6-9. Wang Zheng, Dai Haiping, Wang Jianchen. Development of hollow fiber ultrafiltration membranes with high rejection[J]. Water Purification Technology, 2000, 18(2): 6-9.
[2] 俞三传, 高从堦. 小孔径PVDF超滤膜的研制[J]. 水处理技术, 1999, 25(2): 83-86. Yu Sanchuan, Gao Congjie. Research on PVDF UF membrane with small pore size[J]. Technology of Water Treatment, 1999, 25(2): 83-86.
[3] 何昌生, 孙雪雁. 小孔径磺化聚醚砜超滤膜的研制[J]. 水处理技术, 1998, 24(5): 265-269. He Changsheng, Sun Xueyan. Research on SPES UF membrane with small pore size[J]. Technology of Water Treatment, 1998, 24(5): 265- 269.
[4] 龚琦, 杜邵龙, 董声雄. 小截留分子量共混超滤膜的研究(I)—— PVDF与PVAc的混溶性[J]. 吉林化工学院学报, 2001, 18(1): 18-21. Gong Qi, Du Shaolong, Dong Shengxiong. Study on small molecular weight cut-off (MWCO) blend ultrafiltration membrane (I): Compatibility of PVDF and PVAc[J]. Journal of Jilin Institute of Chemical Technology, 2001, 18(1): 18-21.
[5] 龚琦, 杜邵龙, 董声雄. 小截留分子量共混超滤膜的研究(II)—— PVDF 与PVAc 共混前后超滤膜性能的比较[J]. 吉林化工学院学报, 2001, 18(3): 5-8. Gong Qi, Du Shaolong, Dong Shengxiong. Study on small molecular weight cut-off (MWCO) blend ultrafiltration membrane (II): Comparison of performances between PVDF UF membrane and blend UF membrane[J]. Journal of Jilin Institute of Chemical Technology, 2001, 18 (3): 5-8.
[6] 王静荣, 刘延惠. 醋酸纤维素小孔径超滤膜的研究[J]. 环境科学, 2001, 12(13): 30-34. Wang Jingrong, Liu Yanhui. Preparation of small-porous ultrafiltration membrane with cellulose acetate[J]. Environmental Science, 2001, 12 (13): 30-34.
[7] Kim I C, Yun H G, Lee K H. Preparation of asymmetric polyacrylonitrile Membrane with small poresize by phase inversion and posttreatment process[J]. Journal of Membrane Science, 2002, 199: 75-84.