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Indexed by:期刊论文

Date of Publication:2016-11-01

Journal:JOURNAL OF MEMBRANE SCIENCE

Included Journals:SCIE、EI、Scopus

Volume:517

Page Number:21-29

ISSN No.:0376-7388

Key Words:Inorganic-organic hybrid; Proton-conductive membrane; Copolymerization; Fuel cells

Abstract:Inorganic-organic hybrid membranes consisting of aliphatic main chains and triazole rings were synthesized via copolymerization of a methacryloxysiloxane derivative with phosphonic acrylate, followed by hydrolysis. Hydroxyethyl methacrylate acid phosphate (HEMAP) was copolymerized with 3-methacryloxypropylmethyl-dimethoxysilane (MPMDMS), and then reacted with diethyl (4-(1-(3-(trimethoxysilyl)propyl)-1,2,3-triazol-4-yl)phenyl)phosphonate (TMSTAzPP), yielding inorganic-organic hybrid composites. The triazole ring of TMSTAzPP was constructed via the azide-alkyne click reaction using nanoporous Cu. IR, C-13, and Si-29 NMR spectroscopy supported the formation of the inorganic-organic hybrid structure including a triazole ring. The membranes showed good thermal stability up to 180 degrees C. The conductivity of the HEMAP/MPMDMS/TMSTAzPP membrane with a composition of 7:1:3 was higher than that of the HEMAP/MPMDMS membrane with a composition of 10:1. The conductivities of the 12:1:3 membranes at 130 degrees C were 1.05 x 10(-1) S cm(-1) and 1.68 x 10(-4) S cm(-1) at 100% and 19.3% relative humidities (RHs), respectively. The power density of the 12:1:3 membrane was 3.9 mW cm(-2) at 140 degrees C and 30% RH. (C) 2016 Elsevier B.V. All rights reserved.