Synthesis and characterization of poly(ether sulfone) block copolymers containing pendent quaternary ammonium- and imidazolium groups as anion exchange membranes

被引：25

作者：

Mohanty, Aruna Kumar ^{[1
]}

Devaraju, Subramani ^{[1
]}

Kim, Nowon ^{[2
]}

Paik, Hyun-jong ^{[1
]}

机构：

[1] Pusan Natl Univ, Dept Polymer Sci & Engn, Busan 609735, South Korea

[2] Dong Eui Univ, Dept Environm Engn, Busan 614714, South Korea

来源：

SOLID STATE IONICS | 2018年 / 314卷

基金：

新加坡国家研究基金会;

关键词：

Anion exchange mebrane; Hydroxide conductivity; Alkaline stability; ALKALINE FUEL-CELLS; POLY(ARYLENE ETHER SULFONE); BENZYLMETHYL-CONTAINING POLY(SULFONE)S; HYDROPHOBIC MULTIBLOCK COPOLYMERS; TETRAPHENYL METHANE MOIETIES; BROMINATION; IONOMERS;

D O I：

10.1016/j.ssi.2017.11.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A class of poly(ether sulfone) (FPES) block copolymers containing pendent quaternary ammonium (QA) and imidazolium (IM) groups were prepared as anion exchange membranes by reaction involving nucleophilic substitution, benzylic bromination, quaternization and anion exchange with hydroxide ions. Highly reactive hexafluorobenzene (HFB) was utilized as a linkage group for relatively low temperature (e.g., 105 degrees C) coupling between hydrophobic and precursor hydrophilic oligomer blocks. The phase separated morphology, water uptake, swelling ratio, conductivity, and chemical stability of the resultant copolymer membranes were also investigated. The hydroxide conductivity of the ionomer membranes (IEC similar to 2.0 mequiv./g) was 21-22 mS/cm and 56-63 mS/cm at 30 degrees C and 80 degrees C respectively. The FPES-IM membrane showed relatively very good dimensional integrity in high pH solution, whereas under the similar condition the FPES-QA membrane broke into pieces. However, the degradation of the imidazolium cations in FPES-IM was relatively faster in comparison to the ammonium cations in FPES-QA.

引用

页码：46 / 56

页数：11

共 36 条

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