Preparation and characterization of hollow fiber forward osmosis membrane by interfacial polymerization

doi:10.3969/j.issn.0438-1157.2014.08.032

Abstract

Abstract: Hollow fiber thin film composite forward osmosis membrane was prepared on the top of a tailor-made polysulfone hollow fiber support by interfacial polymerization. The relationship between casting parameters, membrane structure, and FO performance was studied. The results showed that the thickness of substrate membrane was one of the main factors affecting FO performance. The thicker membrane could cause more serious internal concentration polarization, leading to lower effective osmotic pressure across the membrane as well as water flux in the FO process. A thin film composite membrane with a thickness of 0.129 mm and force at breakage of 2.48 N was obtained. The FO membrane showed a water flux of 10.3 L·m^-2·h^-1 and a specific salt diffusion of 0.15 g·L^-1.

Key words: forward osmosis, reverse osmosis, hollow fiber membrane, internal concentration polarization, external concentration polarization

摘要： 以聚砜为原料，通过浸没沉淀法制备中空纤维基膜，然后采用界面聚合法制备出中空纤维正渗透膜。考察了制膜参数、基膜结构和FO性能三者之间的关系。结果表明基膜的厚度为影响FO性能的主要因素之一。基膜的厚度越厚，FO过程中渗透效率越低。制得PSF中空纤维正渗透膜的厚度为0.129 mm，断裂拉伸力为2.48 N，FO通量为10.3 L·m^-2·h^-1，逆向盐扩散性能为0.15 g·L^-1。

关键词: 正渗透, 反渗透, 中空纤维膜, 内浓差极化, 外浓差极化

CLC Number:

LI Gang, WANG Zhouwei, LI Chunxia, LI Xuemei, HE Tao, GAO Congjie. Preparation and characterization of hollow fiber forward osmosis membrane by interfacial polymerization[J]. CIESC Journal, 2014, 65(8): 3082-3088.

李刚, 王周为, 李春霞, 李雪梅, 何涛, 高从堦. 界面聚合中空纤维正渗透膜的制备和表征[J]. 化工学报, 2014, 65(8): 3082-3088.

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