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反离子对磺化杂萘联苯共聚醚砜纳滤膜性能的影响

作者：唐金金，张守海，王丹慧，徐培琦，徐树刚，蹇锡高

单位：大连理工大学化工学院，辽宁省高性能树脂工程技术研究中心，辽宁省高分子科学与工程重点实验室，大连市膜材料与膜过程重点实验室，辽宁大连 116024

关键词：磺化杂萘联苯聚醚砜；反离子；复合纳滤膜；水通量；脱盐率

DOI号：

分类号： TQ 326.55；TB 324

出版年,卷(期):页码： 2021,41(5):65-72

摘要：

将磺化杂萘联苯共聚醚砜浸泡于盐溶液中制备得到磺酸盐型杂萘联苯共聚醚砜（SPPBES-M），对其进行FT-IR和TGA表征。SPPBES-M的5%热失重温度高于489 ℃，具有优异的热稳定性。采用涂覆法制备SPPBES-M/PPBES复合纳滤膜，考察了浸涂液中SPPBES-M浓度、反离子种类、热处理温度以及热处理时间对复合纳滤膜性能的影响。结果表明，随着反离子（Li+、Na+和K+）离子半径增大，SPPBES-M/PPBES复合膜的通量由29 L/(m2·h)增加到36 L/(m2·h)，其脱盐率由65%降低至58%；随着热处理时间和热处理温度升高，复合膜的水通量降低而脱盐率升高，当热处理时间由10min延长至40min，SPPBES-100-K/PPBES复合膜的脱盐率由62%提高至83%。

Sulfonated copoly(phthalazinone biphenyl ether sulfone) substituted by counterions (SPPBES-M) were prepared from sulfonated copoly(phthalazinone biphenyl ether sulfone) (acid form) immersing in salt solutions. SPPBES-M were characterized by FT-IR and TGA. The 5% decomposition temperature of SPPBES-M was higher than 489 ℃, and SPPBES-M had excellent thermal stability. SPPBES-M/PPBES composite nanofiltration membranes were prepared by coating method. The effects of SPPBES-M concentration, counterions, curing treatment temperature, and curing treatment time on the performance of composite nanofiltration membranes were investigated. The rejection of composite membrane decreased from 65% to 58%, and the flux increased from 29 L/(m2·h) to 36 L/(m2·h) with the increase of the radius of counterions (Li+、Na+ and K+). With the increase of curing treatment temperature and time, the water flux of SPPBES-100-M/PPBES composite membranes were decreased, and the rejection were increased. When the curing treatment time extended from 10min to 40min, the rejection enhanced from 62% to 83%.

基金项目：

国家重点研发计划项目(2017YFB0307600)，国家自然科学基金委创新研究群体项目（22021005），辽宁省‘兴辽英才计划’项目(XLYC1802073)，大连市高层次人才创新支持计划（2019RD08）。

作者简介：

唐金金（1996-），女，辽宁省北镇市，硕士，从事磺化杂萘联苯聚醚砜纳滤膜的研究，E-mail：tangjin@mail.dlut.edu.cn

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