Premium
SPES‐SiO 2 hybrid proton exchange membranes from in situ sol–gel process of negatively charged alkoxysilane
Author(s) -
Wu Cuiming,
Xiao Xinle,
Xiao Wenchang,
Wu Yonghui,
Cui Peng,
Xu Tongwen
Publication year - 2011
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.34152
Subject(s) - membrane , hydrogen peroxide , thermal stability , polymer chemistry , conductivity , chemical engineering , proton , ion exchange , materials science , ether , proton exchange membrane fuel cell , chemical stability , chemistry , ion , organic chemistry , biochemistry , physics , quantum mechanics , engineering
Abstract One type of negatively charged alkoxysilane, that is, sulfonated 3‐(mercaptopropyl)trimethoxysilane (SMPTS), has been developed from 3‐(mercaptopropyl)trimethoxysilane (MPTS) and hydrogen peroxide. SMPTS is used to modify sulfonated poly(ether sulfone) (SPES) through in situ sol–gel process. The membranes with proper SMPTS dosage show enhanced ion exchange capacity (IEC), hydrophilicity, mechanical strength, chemical stability, and proton conductivity, which prove that SMPTS is an effective modifier for preparing proton‐exchange hybrid membranes. With MPTS of 5–20%, the hybrid membranes exhibit IEC 1.34–1.50 mmol g −1 , thermal stability 264–316°C, and proton conductivity 0.0015–0.0102 S cm −1 and thus recommended for potential application in fuel cells. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011