Please use this identifier to cite or link to this item:
Title: Restructure proton conducting channels by embedding starburst POSS-g-acrylonitrile oligomer in sulfonic perfluoro polymer matrix
Authors: Zhang, X.
Tay, S.W.
Liu, Z.
Hong, L. 
Keywords: Atom-transfer-radical polymerization
Direct methanol fuel cell
Hybrid nanoparticle
Proton conducting channel
Issue Date: 5-Mar-2009
Citation: Zhang, X., Tay, S.W., Liu, Z., Hong, L. (2009-03-05). Restructure proton conducting channels by embedding starburst POSS-g-acrylonitrile oligomer in sulfonic perfluoro polymer matrix. Journal of Membrane Science 329 (1-2) : 228-235. ScholarBank@NUS Repository.
Abstract: Unique starburst nanoparticles are synthesized via grafting polyacrylonitrile short chains to the cubic polyhedral oligomeric silsesquioxane (POSS) by atom transfer radical polymerization (ATRP). Introduction of these branched nanoparticles (sb-POSS) into the sulfonic perfluoro polymer (SPFP, e.g. Nafion®) matrix in appropriate contents gives significant improvements in the performance of SPFP membranes as direct methanol fuel cell (DMFC). This enhancement is associated with the initial clustering of sb-POSS particles in the SPFP matrix when the sb-POSS content reaches to 5 wt.%. It has been found, from the differential scanning calorimetry (DSC) observation, that the SPFP molecules wage dual interactions on the sb-POSS particles, namely the hydrophobic perfluoro polymer chains of SPFP repel sb-POSS particles while the hydrophilic moieties associate with them. The content of sb-POSS strongly affects the assembly of hydrophilic channels in the membrane and, therefore, the membrane performance in a single direct methanol fuel cell (DMFC). The sb-POSS (5 wt.%)-SPFP composite membrane manifests an increase of 122% in power output of DMFC at 80 °C. In brief, this work offers a new insight into how the unique interactions between soft nanoparticles and amphiphilic polymer chains affects performances of proton exchange membranes (PEMs) in DMFC. © 2008 Elsevier B.V. All rights reserved.
Source Title: Journal of Membrane Science
ISSN: 03767388
DOI: 10.1016/j.memsci.2008.12.050
Appears in Collections:Staff Publications

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


checked on Sep 22, 2018


checked on Sep 12, 2018

Page view(s)

checked on Sep 21, 2018

Google ScholarTM



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