气候变化领域集成服务门户(CCPortal): Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes

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DOI	10.1073/pnas.2022198118
	Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes
	Lounder S.J.; Asatekin A.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:37
英文摘要	Water filtration membranes with advanced ion selectivity are urgently needed for resource recovery and the production of clean drinking water. This work investigates the separation capabilities of cross-linked zwitterionic copolymer membranes, a self-assembled membrane system featuring subnanometer zwitterionic nanochannels. We demonstrate that selective zwitterion-anion interactions simultaneously control salt partitioning and diffusivity, with the permeabilities of NaClO4, NaI, NaBr, NaCl, NaF, and Na2SO4spanning roughly three orders of magnitude over a wide range of feed concentrations. We model salt flux using a one-dimensional transport model based on the Maxwell-Stefan equations and show that diffusion is the dominant mode of transport for 1:1 sodium salts. Differences in zwitterion-Cl-and zwitterion-F-interactions granted these membranes with the ultrahigh Cl-/F-permselectivity (PCl-/PF-= 24), enabling high fluoride retention and high chloride passage even from saline mixtures of NaCl and NaF. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Biomimetic; Ion separation; Membranes; Self-assembly; Synthetic ion channel
语种	英语
scopus关键词	ampholyte; copolymer; nanochannel; sodium bromide; sodium chloride; sodium fluoride; sodium iodide; sodium perchlorate; sodium sulfate; Article; chemical interaction; concentration (parameter); controlled study; cross linking; filtration; ion transport; membrane; molecular diffusivity; phase partitioning; separation technique; synthesis
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238399
作者单位	Department of Chemical and Biological Engineering, Tufts University, Medford, MA 02155, United States
推荐引用方式 GB/T 7714	Lounder S.J.,Asatekin A.. Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes[J],2021,118(37).
APA	Lounder S.J.,&Asatekin A..(2021).Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes.Proceedings of the National Academy of Sciences of the United States of America,118(37).
MLA	Lounder S.J.,et al."Interaction-based ion selectivity exhibited by self-assembled, cross-linked zwitterionic copolymer membranes".Proceedings of the National Academy of Sciences of the United States of America 118.37(2021).