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通过水相分离优化聚电解质协膜
Shao-Hsiang Joe Hung1, Meng-Chen Chiang1, Jessica D Schiffman1
1Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303, United States.
ACS applied materials & interfaces
|December 19, 2024
概括
聚电解质复合物 (PEC) 为净水膜提供了一个可持续的替代品,利用水相分离而不是有毒溶剂. 这些新的PEC膜在去除染料和驱逐细菌方面表现出很高的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 环境工程 环境工程
背景情况:
- 传统的聚合物膜的制造依赖于有毒的有机溶剂,如NMP.
- 需要可持续的膜制造工艺来净化水.
研究的目的:
- 调查聚电解质复合物 (PEC) 对于可持续膜制造的潜力.
- 探索水相分离的使用,以创建下一代净水膜.
主要方法:
- 在化 (KBr) 溶液中使用聚4-styrenesulfonate (PSS) 和聚二甲基化 (PDADMAC) 制造膜.
- 系统评估溶液和凝血浴对膜形成,形态和纯水透率 (PWP) 的影响.
- 使用扫描电子显微镜和死结过试验进行分析;评估盐回火后处理.
主要成果:
- 经过处理的PEC膜实现了6.2 L m-2 h-1 bar-1.1 的PWP.
- 高染料去除效率:甲基色为91.7%,甲基蓝色为80.5%.
- 在静态条件下表现出驱逐大肠杆菌的能力.
结论:
- 通过水相分离制造的PEC膜为传统膜提供了可持续和有效的替代方案.
- 该研究提供了对PEC膜孔形成和分离机制的基本见解.
- 这些发现支持开发用于基于膜的分离的先进,环保材料.
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