优化聚胺薄膜复合物海水淡化膜:通过zwitterionic monohydroxyl monomer进行简单且性能有效的修改
1Integrated Manufacturing Technologies Research and Application Center & Composite Technologies Center of Excellence, Sabancı University, İstanbul, Turkiye.
Turkish journal of chemistry
|September 15, 2025
概括
添加Zwitterionic sulfobetaine组到聚胺膜中,使用一种新的单体. 这种修改显著提高了水的流量,同时保持了优良的盐排斥,以提高反透性能.
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:
- 聚胺 (PA) 薄膜复合膜对于水淡化至关重要.
- 改善膜流量和选择性仍然是逆透 (RO) 中的一个关键挑战.
- 结合zwitterionic组可以通过改变表面水友性来增强膜性质.
研究的目的:
- 合成并将一个zwitterionic单基单体 (ZHM) 纳入PA活性层.
- 评估ZHM结合对膜表面特性,流量和盐排斥的影响.
- 开发具有更好的性能特征的增强型RO膜.
主要方法:
- 使用ZHM,m-phenylenediamine (MPD) 和trimesoyl化物 (TMC) 的界面聚合.
- 通过水接触角 (WCA) 和场辐射扫描电子显微镜 (FESEM) 进行表面表征.
- 使用X射线光电子光谱 (XPS) 和富里埃变换红外光谱 (FTIR) 的光谱学确认.
- 使用15bar的NaCl和MgSO4溶液死点过的性能测试.
主要成果:
- 通过XPS和FTIR证实了ZHM在PA活性层中的成功结合.
- 与对照组 (ZHM-0) 相比,ZHM修改的膜表现出明显增强的水流量.
- 流量从6.8升至9.1升/米2小时 (NaCl),从6.7升至9.5升/米2小时 (MgSO4).
- 盐的排斥仍然很高,大约91%的NaCl和100%的MgSO4,与对照组相比.
结论:
- 合成的ZHM有效地引入Zwitterionic sulfobetaine组到PA膜中.
- 通过ZHM进行Zwitterionic修饰可以增强膜流量,而不会影响盐的排斥能力.
- 这种方法为开发用于水处理的高性能RO膜提供了一个有前途的战略.
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