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Airflow‐Field‐Induced Sandwich‐Type Membrane of Block Copolymer for Selective Ion Separation
Author(s) -
Shan Feng,
Lu Xuemin,
Guan Junfang,
Lu Qinghua,
Feng Xingliang
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201300880
Subject(s) - copolymer , membrane , materials science , ion , airflow , nanotechnology , block (permutation group theory) , self assembly , ion exchange , morphology (biology) , chemical engineering , polymer , composite material , chemistry , organic chemistry , biology , genetics , mechanical engineering , biochemistry , geometry , mathematics , engineering
A simple and effective airflow method to prepare sandwich‐type block copolymer films is reported. The films are composed of three layers: vertically oriented nanocylinders align in both upper and bottom layers and irregular nanocylinders exist in the bulk of the film. The vertically oriented nanocylinders in both sides can provide high accessibility to ions and ensures the exchange of chemical species between the membrane and external environment, while the irregularly oriented nanocylinders in the middle part of the film can prolong the pathway of ions transportation and enhance ions selectivity.