期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 11, 期 7, 页码 1492-1495出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.05.038
关键词
Nanoparticle dispersion; Wet-type milling; SPAES/SiO2 composite membranes; DMFC membrane performance
资金
- Ministry of Knowledge Economy, Republic of Korea
- Korea Evaluation Institute of Industrial Technology (KEIT) [K0004131] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A novel approach for effectively dispersing SiO2 nanoparticles in a sulfonated poly(arylene ether sulfone) ionomer (SPAES) matrix has been demonstrated. It is based on the application of wet-type milling process. Compared to a conventional mixing process such as sonication, wet-type milling allowed noticeable improvements in SiO2 nanoparticle dispersion, owing to the intensive impact of collisions between milling beads and nanoparticles. In terms of nanoparticle dispersion, the influence of wet-type milling on the direct methanol fuel cells (DMFC) membrane performance such as proton conductivity, methanol permeability, and selectivity was examined and compared with sonication process. This study underlines that nanoparticle dispersion in the composite membranes is crucial in determining DMFC membrane performance and can be substantially improved by employing a novel mixing process, i.e. wet-type milling. (c) 2009 Elsevier B.V. All rights reserved.
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