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A novel ion‐imprinted hydrogel for recognition of potassium ions with rapid response
Author(s) -
Wu HanGuang,
Ju XiaoJie,
Xie Rui,
Liu YingMei,
Deng JinGen,
Niu Catherine Hui,
Chu LiangYin
Publication year - 2011
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1843
Subject(s) - self healing hydrogels , potassium , ion , materials science , crown ether , polymer chemistry , chemical engineering , acrylamide , 18 crown 6 , polymer , copolymer , chemistry , organic chemistry , composite material , engineering , metallurgy
A novel ion‐imprinted strategy is developed for synthesizing responsive hydrogels with rapid response to potassium ions. With potassium ions as templates, ion‐imprinted poly( N ‐isopropylacrylamide‐ co ‐benzo‐15‐crown‐5‐acrylamide) (P(NIPAM‐ co ‐B15C5Am)) hydrogels are synthesized with 15‐crown‐5 crown ethers mounted on the polymer networks in pairs; therefore, it is very easy and fast for the crown ethers to capture potassium ions again by their Venus flytrap action and form stable 2:1 “host–guest” complexes with potassium ions in the ion‐recognition process. As a result, the response rate of the ion‐imprinted hydrogels to potassium ions is significantly faster than that of normal P(NIPAM‐ co ‐B15C5Am) hydrogels in which 15‐crown‐5 crown ethers are randomly pendent on the polymeric networks. Copyright © 2010 John Wiley & Sons, Ltd.