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双层与聚合物人工水道膜:增强过性能的结构决定因素

Li-Bo Huang^1,2, Maria Di Vincenzo², M Göktuğ Ahunbay^2,3,4

¹Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China.

Journal of the American Chemical Society

|August 27, 2021

概括

灵感来源于水族的人工水道 (AWC) 增强了水运输. 在海水淡化应用中,优化AWC溶解度和疏水尾部长度对于高性能仿生膜至关重要.

科学领域:

生物仿真膜是一种生物仿真膜.
纳米技术纳米技术
水的净化水的净化方法

背景情况:

人工水道 (AWCs) 模仿了自然的水,用于选择性水运输.
仿生膜的灵感来源于这些通道,用于诸如海水淡化等应用.
AWC展示了影响膜性能的多样化的架构和形态.

研究的目的:

在双层和聚胺 (PA) 膜中批判性地讨论对仿生I四重奏性能的结构影响.
确定提高AWC中的水透性和盐排斥的关键参数.
了解AWC特性与膜缺陷形成之间的关系.

主要方法:

适应性自我组装的基化-乙基化醇 (HC4-HC18) 在I四重奏.
采用AWC的双层和PA膜的制造和性能测试.
对水的透性和NaCl排斥率的定量评估.
对AWC溶解性和分散效应对膜形态学的分析.

主要成果:

在AWC中增加尾的长度显著提高了单通道的水透性 (10^4到10^7分子/s/通道).
基于HC4和HC6的PA膜显示了提高的水透性 (2.09-3.85 L m^-2 h^-1 bar^-1) 与高NaCl排斥 (>99.25%).
HC8的结合导致性能下降,归因于纳米级海绵状通道形成和由于溶解性和分散性差的缺陷.

结论:

尾的疏水性对于AWC中的高水性至关重要.
最佳的AWC溶解度对于稳定的结合,均的分布和最大限度地减少混合PA膜中的缺陷至关重要.
需要仔细选择AWC属性,才能在海水淡化膜中实现突破性性能.

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