Thesis
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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | 이승옥 | en_US |
| dc.date.accessioned | 2014-12-01T11:47:52Z | - |
| dc.date.available | 2014-12-01T11:47:52Z | - |
| dc.date.issued | 2012 | en_US |
| dc.identifier.other | OAK-2014-00908 | en_US |
| dc.identifier.uri | http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000001217024 | en_US |
| dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/1410 | - |
| dc.description | Master | en_US |
| dc.description.abstract | Free-standing, flexible and thermally stable membrane, a hybrid of sulfonated silica and poly (dimethylsiloxane) (PDMS) was synthesized for proton exchange membrane fuel cells (PEMFCs) and its properties were analyzed. PDMS was reacted with 3-mercaptopropyl trimethoxysilane (MPTMS) by sol-gel process with acid catalyst. Thiol group (-SH) in MPTMS was oxidized into sulfonic group (-SO3H) during the reaction, which enabled the membrane proton conductible. Reaction conditions and weight ratio of PDMS and MPTMS decided the brittleness of membrane. Ca. 20wt% of MPTMS and more than 48hr of aging time were essential for acquiring free-standing and crackles membrane. Sequence of adding precursors was also crucial to membrane’s properties.As a result, synthesized membrane showed ca. 7.84% of water uptake ability and ca. 0.0424S/cm of proton conductivity (at 60℃, 100% RH.) at most. | en_US |
| dc.language | kor | en_US |
| dc.publisher | 포항공과대학교 | en_US |
| dc.rights | BY_NC_ND | en_US |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/2.0/kr | en_US |
| dc.title | Sulfonated Silica-Poly(dimethylsiloxane) Hybrid Membranes for Proton Exchage Membrane Fuel Cells | en_US |
| dc.title.alternative | 고분자 전해질 연료전지에 사용되는 유-무기 복합 전해질막 소재의 개발 | en_US |
| dc.type | Thesis | en_US |
| dc.contributor.college | 일반대학원 화학공학과 | en_US |
| dc.date.degree | 2012- 2 | en_US |
| dc.type.docType | Thesis | - |
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