期刊
JOURNAL OF MEMBRANE SCIENCE
卷 322, 期 1, 页码 67-73出版社
ELSEVIER
DOI: 10.1016/j.memsci.2008.05.040
关键词
proton exchange membrane; sulphonated poly (ether ether ketone) (SPEEK); crosslinker; physico-chemical properties
2,6-Bis(hydroxymethyl)-4-methyl phenol and 1,4-bis(hydroxymethyl) benzene have been used as crosslinkers in sulphonated poly (ether ether ketone) (SPEEK DS 65%, IEC 1.84 mequiv./g) for the preparation of proton exchange membranes (PEMs). Crosslinking of SPEEK has been achieved by thermally activated bridging of the polymer chain with the hydroxymethyl group of crosslinker through condensation reaction with sulphonic acid group. The physico-chemical properties of uncrosslinked and crosslinked membrane were evaluated in terms of ion exchange capacity (IEC), water uptake, ionic conductivity and mechanical properties. The crosslinked membrane showed controlled swelling, ionic conductivity of 25-50 mS/cm at 80 degrees C and good mechanical properties. The chemical stability of the crosslinked membranes was studied by Fenton's test. The % loss in weight and changes in physico-chemical properties of the treated membranes were determined. (c) 2008 Elsevier B.V. All rights reserved.
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