聚砜-聚酰胺正渗透复合膜的制备及性能优化

发布时间：2018-05-09 17:10

本文选题：正渗透复合膜 + 正渗透性能　；参考：《环境科学与技术》2017年S1期

【摘要】：采用相转化的方法制备聚砜支撑层,在其表面进行界面聚合得到聚砜-聚酰胺正渗透复合膜。系统研究了聚砜浓度、溶剂比例、支撑层厚度对膜性能的影响,并且优化了测试条件(如:膜面流速、错流方向、原料液温度以及驱动液浓度)。结果表明,在聚砜含量为w=12%、NMP与DMF质量比为3∶1、刮膜厚度为150μm、膜面流速为2.47 cm/s、反向错流方式下,聚砜-聚酰胺正渗透膜性能为:FO模式下,水通量为12.69 L/(m~2·h),反向盐通量为5.55 g/(m~2·h);PRO模式下,水通量为21.48 L/(m~2·h),反向盐通量为9.18 g/(m~2·h)。此外,原料液温度升高和驱动液浓度增加有利于提高膜的性能。正渗透复合膜的形貌和表面粗糙度通过SEM和AFM进行表征。
[Abstract]:Poly (sulfone) support layer was prepared by phase conversion method, and the polysulfone-polyamide composite membrane was prepared by interfacial polymerization on its surface. The effects of concentration of polysulfone solvent ratio and thickness of supporting layer on the performance of the membrane were studied systematically. The test conditions such as membrane flow rate cross-flow direction raw material temperature and the concentration of the driving solution were optimized. The results show that when the content of polysulfone is 3: 1, the thickness of the membrane is 150 渭 m, the flow rate of the membrane is 2.47 cm / s, and the reverse cross-flow mode, the performance of the membrane is in the ratio of 1: 1, the membrane thickness is 150 渭 m, and the performance of the membrane is in the mode of: FO. The water flux is 12.69 L/(m~2 ~ (-1), the reverse salt flux is 5.55 g/(m~2 / h ~ (-1) pro model, the water flux is 21.48 L/(m~2 / h ~ (-1) and the reverse salt flux is 9.18 g/(m~2 / h ~ (-1). In addition, the increase of the temperature of the feed solution and the increase of the concentration of the driving liquid can improve the performance of the film. The morphology and surface roughness of the composite membrane were characterized by SEM and AFM.
【作者单位】：北京林业大学环境科学与工程学院;
【基金】：中央高校基本科研业务费专项资金资助(2016ZCQ03)
【分类号】：TQ051.893

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