The effect of counterions on the performance of sulfonated copoly( phthalazinone biphenyl ether sulfone) NF membrane |
Authors: Tang Jinjin, Zhang Shouhai, Wang danhui, Xu Peiqi, Xu Shugang, Jian Xigao |
Units: College of chemical engineering, Dalian University of Technology, Liaoning High Performance Polymer Engineering Research Center, Liaoning Key Laboratory of Polymer Science and Engineering, Dalian Key Laboratory of Membrane Materials and Process, Dalian 116024, China |
KeyWords: sulfonated copoly(phthalazinone biphenyl ether sulfone); counterion; composite nanofiltration membrane; water flux; rejection |
ClassificationCode:TQ 326.55;TB 324 |
year,volume(issue):pagination: 2021,41(5):65-72 |
Abstract: |
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%. |
Funds: |
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)。 |
AuthorIntro: |
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 |
Reference: |
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