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通过界面聚合制备制备冠状含聚胺膜及其海水淡化性能

Liqing Xing¹, Liping Lin¹, Jiaxin Guo¹

¹Shaanxi Key Laboratory of Energy Chemical Process Intensification, Department of Chemical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

|March 26, 2025

概括

皇冠以太微孔被引入到芳香聚胺膜中,以增强水处理. 这种修改显著改善了淡化应用的水透性和盐排斥.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

芳香聚胺 (PA) 薄膜复合材料 (TFC) 膜对于反透 (RO) 淡化至关重要,但在水透性和盐排斥方面存在局限性.
解决全球水资源短缺问题需要在膜技术方面取得进展,以有效净化水.

研究的目的:

通过引入基于皇冠以太的循环微孔来提高PA TFC膜的性能.
提高水的透性和盐的排斥能力,以有效地处理水.

主要方法:

使用层对层界面聚合 (LbL-IP) 方法将皇冠乙烯纳入PA层.
通过将m-phenylenediamine (MPD) 和trimesoyl chloride (TMC) 与di(aminobenzo) -18-crown-6 (DAB18C6) 反应而合成修饰膜.
使用富里埃变换红外光谱 (FTIR),X射线光电子光谱 (XPS),扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 描述了膜性质.

主要成果:

皇冠以太的修改导致水接触角度从54.1°显著减少到31.6°,表明增强的水友性.
与未经修改的膜相比,经过修改的膜具有十倍以上的水透性.
实现了超过95%的Na₂SO₄,MgSO₄,MgCl₂和NaCl溶液的排斥,显示了改进的离子排斥.

结论:

通过皇冠以太接种引入循环微孔是一种可行的策略,可以提高PA膜的性能.
开发的皇冠以太改性膜显示了先进水处理的巨大潜力,特别是用于海水淡化.
这种简单的表面改造提供了一个有希望的途径,可以克服当前用于净化水的膜技术的局限性.

关键词:

在 RO 膜中,有 RO 膜.皇冠以太币是什么意思接口聚合物化的介面.聚胺聚胺的使用方法

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