Crosslinked poly (ether ether ketone) hydroxide exchange membranes with improved conductivity
发布时间：2019-03-09
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- 论文类型：
- 期刊论文
- 发表时间：
- 2014-06-01
- 发表刊物：
- JOURNAL OF MEMBRANE SCIENCE
- 收录刊物：
- Scopus、EI、SCIE
- 文献类型：
- J
- 卷号：
- 459
- 页面范围：
- 86-95
- ISSN号：
- 0376-7388
- 关键字：
- Hydroxide exchange membrane; 1,4-diazabicyclo [2,2,2] octane; Crosslinking; Ion concentration; Hydroxide conductivity
- 摘要：
- Crosslinked poly (ether ether ketone) (PEEK) hydroxide exchange membranes are prepared using bifunctional cyclic ammonium, 1,4-diazabicyclo [2,2,2] octane (DABCO), as simultaneous quaternization and crosslinking reagent. Hydroxide conductivity and ion mobility are evaluated as a function of ion concentration, which integrates the counteracting effects of the hydroxide ion amount and crosslinking degree. With the increase of ion concentration, effective mobility of hydroxide ion increases to a high level and then levels off or slightly goes down, suggesting a balance existed between ion concentration and mobility in the crosslinked membranes. As a result, hydroxide conductivity increases rapidly to a high stable level, indicating the applicable range of ion concentration (up to 1.0 mol L-1) for improving hydroxide conductivity. The crosslinked membranes exhibit high hydroxide conductivity of 33.4 mS cm(-1) at 25 degrees C and low swelling ratio of 48.2% at 60 degrees C. Thermal stability (T-onset: 176 degrees C) of the crosslinked membranes is better as compared with the non-crosslinked (T-onset : 165 degrees C) and trimethylamine quaternized PEEK membranes., (C) 2014 Elsevier B.V. All rights reserved.
- 第一作者
- Wang, Junjun
- 合写作者
- Wang, Yongdong,Du, Lin,Yan, Xiaoming,Zhang, Yanpu,He, Gaohong,Wu, Xuemei
- 通讯作者
- Wu, XM (reprint author), Dalian Univ Technol, Res & Dev Ctr Membrane Sci & Technol, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China.