Please use this identifier to cite or link to this item:
Title: Doping Nafion® matrix by p-aramid flakes for a proton transport less reliant on moisture
Authors: Guo, B.
Liu, Z.
Hong, L. 
Issue Date: 7-Sep-2011
Citation: Guo, B., Liu, Z., Hong, L. (2011-09-07). Doping Nafion® matrix by p-aramid flakes for a proton transport less reliant on moisture. Journal of Materials Chemistry 21 (33) : 12414-12421. ScholarBank@NUS Repository.
Abstract: Dispersion of a low dose of oligomeric poly(p-phenylene terephthalamide) (PPTA) flakes (∼20 nm) in a matrix of Nafion® causes a reduction in glass transition temperature and storage modulus of the membrane. This matrix-softening phenomenon is attributed to the adsorption of Nafion molecules to the PPTA nanoflakes, which makes the Nafion matrix become less hydrophilic according to water uptake and contact angle measurements. This association was also validated through examining the zeta potential of the colloidal suspension prepared by dispersing PPTA flakes in a dilute Nafion solution. The measurement shows strong clustering between the sulfonic acid groups of Nafion molecules and individual PPTA flakes. The resulting composite matrix provides an alternative proton-transfer channel which shows less reliance on moisture levels. Hence, the matrix sustains a power density (450 mW cm-2) 2 times greater than what a pristine cast Nafion and Nafion-112® membrane would confer at 70 °C and under low humidity conditions. © 2011 The Royal Society of Chemistry.
Source Title: Journal of Materials Chemistry
ISSN: 09599428
DOI: 10.1039/c1jm12057c
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Sep 19, 2018


checked on Sep 19, 2018

Page view(s)

checked on Sep 14, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.