Preparation and Characterization of the Novel Organic/Inorganic Nanocomposites Membranes
碩士 === 國立雲林科技大學 === 工業化學與災害防治研究所 === 92 === The purpose of this study is to prepare a novel class of proton exchange membrane with high ionic conductivity and low methanol permeability for the application of direct methanol fuel cell (DMFC). The basic concept is to prepare an organic/Inorganic hybri...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2004
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| Online Access: | http://ndltd.ncl.edu.tw/handle/60310039535806016942 |
| Summary: | 碩士 === 國立雲林科技大學 === 工業化學與災害防治研究所 === 92 === The purpose of this study is to prepare a novel class of proton exchange membrane with high ionic conductivity and low methanol permeability for the application of direct methanol fuel cell (DMFC). The basic concept is to prepare an organic/Inorganic hybrid membrane by a sol-gel approach. Precursor for sol-gel reaction used was polyethylene oxide (MW=600 g/mol) as organic phase, end-capped with 3-triethoxysil-propyl isocyanate as inorganic phase. The silica phase was further modifiled by monophenyl trithoxysilane (MPh) to improve the flexibility of the membrane. The capability of the protonic conductivity of the hybrid membrane was obtained through the 12-tungstophosphoric acid (PWA) as aproton-carrier. Properties such as ion exchange capacity, thermal stability, and ionic conductivity of the hybrid membrane were measured and analyzed. We have performed experiments involving the use of 29Si solid state cross polarization/magic angle spinning (CP/MAS)SSNMR spectroscopy to characterize the hybrid precursor and MPh that containing –Si(OR)3 groups covalently bound to each other and the evaluation of the degree of polycondensation. The permeability of 3 wt% methanol solution that the methanol diffusivity in the high landing PWA and high landing MPh has small.
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