Indexed by:
期刊论文
First Author:
Wang, Junjun
Correspondence Author:
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.
Co-author:
He, Gaohong,Wu, Xuemei,Yan, Xiaoming,Zhang, Yanpu,Wang, Yongdong,Du, Lin
Date of Publication:
2014-06-01
Journal:
JOURNAL OF MEMBRANE SCIENCE
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
459
Page Number:
86-95
ISSN No.:
0376-7388
Key Words:
Hydroxide exchange membrane; 1,4-diazabicyclo [2,2,2] octane;
Crosslinking; Ion concentration; Hydroxide conductivity
Abstract:
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.
Translation or Not:
no
