Zhang Shouhai, Guan Shanshan, Liu Chengde, Wang Zhenlin, Wang Danhui, Jian Xigao
State Key Laboratory of Fine Chemicals, Liaoning High Performance Polymer Engineering Research Center, College of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
Membranes (Basel). 2019 Jan 2;9(1):6. doi: 10.3390/membranes9010006.
This paper discusses the effect of the chemical structure of sulfonated poly(aryl ether sulfone) on the performance of composite nanofiltration membranes. The composite nanofiltration membranes were fabricated by coating sulfonated poly(aryl ether sulfone) solution onto the top surface of poly(phthalazinone ether sulfone ketone) support membranes. Three kinds of sulfonated poly(aryl ether sulfone)s with different amounts of phthalazinone moieties, namely, sulfonated poly(phthalazinone ether sulfone) (SPPES), sulfonated poly(phthalazinone biphenyl ether sulfone) (SPPBES), and sulfonated poly(phthalazinone hydroquinone ether sulfone)s (SPPHES), were used as coating materials. The solvents used in preparing the coating solution were investigated and optimized. The separation properties, thermal stability, and chlorine resistance of composite membranes were determined. The structures and morphologies of membranes were characterized with FTIR and SEM, respectively. The membrane prepared from SPPES with more phthalazinone moiety groups showed high water flux and salt rejection. The salt rejection of composite membranes followed the order SPPES > SPPHES > SPPBES. The rejection of the three composite membranes decreased slightly with the solution temperature rising from 20 to 90 °C, while the composite membrane with SPPES as the active layer showed a higher increase in flux than others. The results indicate that SPPES composite membranes show better thermal stability than others.
本文讨论了磺化聚芳醚砜的化学结构对复合纳滤膜性能的影响。通过将磺化聚芳醚砜溶液涂覆在聚（酞嗪酮醚砜酮）支撑膜的顶表面制备复合纳滤膜。使用三种具有不同酞嗪酮部分含量的磺化聚芳醚砜，即磺化聚（酞嗪酮醚砜）（SPPES）、磺化聚（酞嗪酮联苯醚砜）（SPPBES）和磺化聚（酞嗪酮对苯二酚醚砜）（SPPHES）作为涂层材料。对制备涂层溶液中使用的溶剂进行了研究和优化。测定了复合膜的分离性能、热稳定性和耐氯性。分别用傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）对膜的结构和形态进行了表征。由具有更多酞嗪酮基团的SPPES制备的膜表现出高水通量和盐截留率。复合膜的盐截留率顺序为SPPES＞SPPHES＞SPPBES。随着溶液温度从20℃升高到90℃，三种复合膜的截留率略有下降，而以SPPES为活性层的复合膜通量增加幅度比其他膜更高。结果表明，SPPES复合膜比其他复合膜表现出更好的热稳定性。
