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亚-1 Å选聚胺膜的无水界面聚合

Guangjin Zhao¹, Haiqi Gao², Zhou Qu¹

¹College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, PR China.

Nature communications

|November 22, 2023

概括

研究人员开发了一种新型无水界面聚合 (AIP) 方法,用于制造高度透的聚胺 (PA) 膜. 这种技术可以实现精确的离子选,以狭窄的孔径分布来实现节能分离.

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.
分离科学分离科学

背景情况:

聚胺 (PA) 膜对于节能化学分离至关重要,因为它们具有高透性和离子选能力.
实现精确的离子选需要具有狭窄孔径分布的膜,这是通过常规方法难以获得的.

研究的目的:

开发一种创新的膜形成工艺,以创建具有高透性的PA膜,具有精确的离子选.
研究无水界面聚合 (AIP) 的潜力,以设计具有受控孔隙结构的PA膜.

主要方法:

在固体-液体接口上使用无水界面聚合 (AIP).
一个升华的氨基层与含有的乙烯化物发生反应,消除了水引起的副作用.
该过程促进了密集和有序的界面聚合 (IP) 反应.

主要成果:

形成了一个独特的PA层,其离子选精度为0.5 Å.
由此产生的AIP-PA膜对单价/双价 (例如,Mg2+/Li+在78.3) 和离子 (例如,Cl2-SO4在29.2) 具有很高的分离选择性.
实现了13.6 L m-2 h-1 bar-1 的高水流.

结论:

无水界面聚合 (AIP) 策略可制造具有高精度和狭窄孔径分布的PA膜.
这种方法为工程高性能PA膜的先进分离应用提供了一个有前途的方法.
AIP技术为开发节能分离工艺提供了一条途径.

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