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Sulfonated multiwalled carbon nanotube/sulfonated poly(ether sulfone) composite membrane with low methanol permeability for direct methanol fuel cells
Author(s) -
Yun Sungjin,
Heo Yusun,
Im Hyungu,
Kim Jooheon
Publication year - 2012
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.36741
Subject(s) - sulfone , methanol , methanol fuel , materials science , ether , carbon nanotube , composite number , membrane , chemical engineering , permeability (electromagnetism) , polymer chemistry , composite material , chemistry , organic chemistry , biochemistry , engineering
An organic/inorganic composite membrane was prepared based on sulfonated poly(ether sulfone) (s‐PES) embedded with sulfonated multiwalled carbon nanotubes (s‐MWNTs). The ion exchange capacity (IEC), proton conductivity, and water uptake of the SPES membranes increased with increasing s‐MWNTs content. The increased water uptake was attributed to hydrogen bond formation between the carbonyl group of the s‐MWNTs and a water molecule. The composite membranes exhibited proton conductivities ranging from 3.9281 × 10 −4 to 7.0788 × 10 −3 S/cm at 80°C, as well as low methanol permeability ranging from 4.4405 × 10 −10 to 9.1008 × 10 −10 cm 2 s −1 at 25°C. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012