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A novel route for the preparation of hybrid zwitterionic membranes containing both sulfonic and carboxylic acid groups
Author(s) -
Liu Junsheng,
Xu Tongwen,
Fu Yanxun
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27486
Subject(s) - membrane , sulfonic acid , curing (chemistry) , polymer chemistry , chemical engineering , materials science , ion exchange , fourier transform infrared spectroscopy , carboxylic acid , coating , chemistry , nuclear chemistry , ion , organic chemistry , composite material , biochemistry , engineering
A novel route for the preparation of hybrid zwitterionic membranes containing both sulfonic and carboxylic acid groups is reported. Based on this synthetic methodology, a series of membranes were synthesized via sol–gel reaction, zwitterionization process, and the oxidization of the SH group. FTIR spectra confirmed the corresponding reactions. The properties of these prepared membranes were characterized by ion‐exchange capacity (IEC), water content, and pure water flux, etc. The anion‐exchange capacity (AIEC), total cation‐exchange capacity (CIEC total ), and the CIEC of the sulfonic groups (CIEC sulf ) of the membranes coated for 1–3 times were in the range of 0.017–0.12, 0.1–0.53, and 0.029–0.14 mmol g −1 , respectively. The measurement of water content showed that it was independent of pH values whether for the membranes coated once or twice. Pure water flux revealed a downward trend with the increased coating times. The surface SEM images of the produced membranes exhibited that these membranes' textures could be affected highly by the curing temperature, and excessively higher curing temperature would lead the membranes to brittle and chasm. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008