在松散的纳米过中打破透性-选择性权衡:Zwitterionic层次膜用于优质的抗污染染料/盐分离
Caihong Liu1, Ao Shuai1, Jingjun Bo1
1Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing 400044, PR China.
Water research
|January 9, 2026
概括
这项研究开发了用于织废水处理的先进层次膜 (LbL). 优化的zwitterionic修饰膜显著改善了水的透性和染料的排斥,解决了资源回收的膜三难题.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 从织废水中回收资源对于循环经济至关重要.
- 膜技术面临着一个巨大的挑战.
- 三重难题 三重难题
- 的平衡选择性,透性和稳定性.
- 现有的方法与高效的染料和盐分离以及膜污染作斗争.
研究的目的:
- 为了研究层次层次 (LbL) 膜中的染料/盐分离机制.
- 通过zwitterionic修饰来增强膜的透性和防腐性.
- 开发一种用于工业废水回收的高性能膜.
主要方法:
- 通过调节双层数和终端化学 (聚乙烯胺/聚 (4-styrenesulfonate)) 来系统地研究LbL膜的性能.
- 密度功能理论 (DFT) 计算以验证染料-聚合物结合相互作用.
- 将zwitterionic部分 (例如SBMA) 纳入LbL架构.
- 膜的测试与真正的工业废水在两个阶段的过程中.
主要成果:
- 分离性能是由与终端层的非选相互作用决定的,PSS的染料聚合物结合比PEI更强.
- 最佳的SBMA修饰膜实现了高的水透性 (194.16 L·m−2·h−1·bar−1) 和>99%的染料排斥.
- 修改后的膜表现出极好的防性 (66%的流量回收) 和增加的界面排斥能.
- 使用真实废水的两步过程实现了接近1000的染料/盐分离因子.
结论:
- 建立了设计高性能膜的机制驱动策略.
- 兹维特里昂基基修饰有效地克服了膜三难题,增强了分离和抗污染性质.
- 开发的膜为工业废水回收和资源回收提供了强大而可扩展的解决方案.
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