2016
DOI: 10.1007/s10008-016-3341-1
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Properties and structure of heterogeneous ion-exchange membranes after exposure to chemical agents

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Cited by 14 publications
(8 citation statements)
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“…The increased electrical resistance of the AEMs conflicted with the aforementioned enhancement of the water content, likely because the degraded polymer matrix of the AEMs had a more heterogeneous distribution of the functional groups. As presented in Figure e, the IEC of the AEM decreased after aging in the NaOH solution, which was also closely related to the increases in electrical resistance . Herein, the rapid increase in the membrane resistance corresponded to the progressive reduction of the IEC levels when aging within 1 day.…”
Section: Resultsmentioning
confidence: 97%
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“…The increased electrical resistance of the AEMs conflicted with the aforementioned enhancement of the water content, likely because the degraded polymer matrix of the AEMs had a more heterogeneous distribution of the functional groups. As presented in Figure e, the IEC of the AEM decreased after aging in the NaOH solution, which was also closely related to the increases in electrical resistance . Herein, the rapid increase in the membrane resistance corresponded to the progressive reduction of the IEC levels when aging within 1 day.…”
Section: Resultsmentioning
confidence: 97%
“…The IEMs, which were identical to those used in curve 1 in Figure a, were applied in an ED process with 0.05 M NaCl solution (i.e., the feed solution without the addition of a foulant) for 6 h. Then, the desalination rates were measured (see curve 2 in Figure a) and were significantly enhanced in comparison with those of the immediately measured case (see curve 1 in Figure a). A reasonable explanation was that a weak acidic condition was generated due to the inevitable dissociation of water molecules during the ED process , and promoted the ionization of the tertiary amine on the aged AEMs . To further understand this proposal, a group of aged AEM samples, which were identical to those used in curve 1 in Figure a, was immersed in 0.1 M HCl solution for 6 h, and then the desalination rates were measured (see curve 3 in Figure a).…”
Section: Resultsmentioning
confidence: 99%
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“…IEMs are designed and produced to have desirable characteristics such as high permselectivity, high conductivity, good mechanical strength, structural stability and high chemical and thermal stability [ 57 , 58 , 59 ]. The characteristics are also dependent on factors such as size of the ion exchange resin, resin loading, resin distribution, polymer used, solvent and method.…”
Section: Ion Exchange Membranes (Iem)mentioning
confidence: 99%