膜科学与技术

含羧基侧基的磺化聚芳醚砜复合反渗透膜的制备与性能研究

作者：张杨，严昊，潘国元，郭敏，张超，徐建，刘轶群

单位：中国石油化工股份有限公司北京化工研究院

关键词：羧基；磺化聚芳醚砜；反渗透膜

出版年,卷(期):页码： 2013,33(6):43-46

摘要：

利用双酚酸与4,4，-二氯二苯砜，3,3′-二磺化-4,4′-二氯二苯砜二钠盐的亲核取代反应，制备了新型的含有羧基侧基的磺化聚芳醚砜（C-SPAES），通过核磁光谱对其结构进行了表征。以所合成的C-SPAES为分离层材料，聚砜超滤膜为支撑层，采用刷涂法制备了复合型反渗透膜。扫描电镜照片显示该方法制备的反渗透膜表面平整，而且无缺陷。所制备的C-SPAES复合反渗透膜具有良好的透水和截盐性能，其中C-SPAES-1.0复合反渗透膜，其对氯化钠的截留率可以达到90.2%，在2.0MPa下的水通量为11.4L/m2h.

Novel sulfonated poly(arylene ether sulfone) bearing pendant carboxylic acid group polymer (C-SPAES) were synthesized by direct copolymerization of 4,4′-bis(4-hydroxyphenyl) valeric acid , 4,4'-dichlorodiphenyl sulfone and disodium 3,3′-disulfonate-4,4′-dichlorodiphenylsulfone . The expected structure of the polymer was confirmed by 1H NMR. Reverse osmosis membranes were obtained by brushing method with C-SPAES as functional material and ultrafiltration membrane as support layer. The SEM results indicated that the obtained reverse osmosis membranes had smooth surface, and no defect was observed. All the membranes showed improved water flux and salt rejection. Notably, C-SPAES-1.0, with C-SPAES content of 1.0%, exhibited a salt rejection of 90.2% and water flux of 11.4L/m2h at 2.0 Mpa.

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