{"id":{"repo_id":"nus","oai_identifier":"oai:scholarbank.nus.edu.sg:10635/13294"},"canonical_url":"https://search.dev.ndltd.org/etd/nus/oai:scholarbank.nus.edu.sg:10635/13294","repository":{"repo_id":"nus","name":"National University of Singapore","base_url":"https://scholarbank.nus.edu.sg/oai/request"},"display":{"title":"Polymer electrolyte membranes for direct methanol fuel cells","abstract":"This thesis study is aimed at producing proton-conducting polymer electrolyte membranes (PEMs) for direct methanol fuel cells (DMFCs). In this thesis, relatively inexpensive monomers, 2-acrylamido-2-methyl propanesulfonic acid (AMPS) and 3-sulfopropyl methacrylate (SPM) in particular, were deployed as the proton source in a predominantly acrylic-based copolymer network with methanol blocking property. A number of preparation methods and their variations were explored, with fairly extensive microstructural characterizations of the resulting PEMs. The properties of most relevance to DMFC applications, especially proton conductivity and methanol permeability, were measured and compared with those of NafionA?. The experimental results showed promising performance of AMPS-based and SPM-based PEMs for DMFC applications.","abstract_html":"This thesis study is aimed at producing proton-conducting polymer electrolyte membranes (PEMs) for direct methanol fuel cells (DMFCs). In this thesis, relatively inexpensive monomers, 2-acrylamido-2-methyl propanesulfonic acid (AMPS) and 3-sulfopropyl methacrylate (SPM) in particular, were deployed as the proton source in a predominantly acrylic-based copolymer network with methanol blocking property. A number of preparation methods and their variations were explored, with fairly extensive microstructural characterizations of the resulting PEMs. The properties of most relevance to DMFC applications, especially proton conductivity and methanol permeability, were measured and compared with those of NafionA?. The experimental results showed promising performance of AMPS-based and SPM-based PEMs for DMFC applications.","abstract_has_math":false,"creators":["PEI HAIQIN"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["LEE JIM YANG","HONG LIANG"],"committee_chairs":[],"committee_members":[],"year":2007,"date_issued":"2007-09-26","date_published":"2007-09-26","updated_at":"2026-08-21T16:47:09Z","subjects":["DMFCs, PEMs, AMPS, SPM, Proton Conductivity, Methanol Permeability"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://scholarbank.nus.edu.sg/handle/10635/13294","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"source_record":{"url":"https://scholarbank.nus.edu.sg/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Ascholarbank.nus.edu.sg%3A10635%2F13294","prefix":"dim"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["CHEMICAL & BIOMOLECULAR ENGINEERING"]},{"key":"dc:contributor.supervisor","label":"Supervisor","values":["LEE JIM YANG","HONG LIANG"]},{"key":"dc:creator","label":"Author","values":["PEI HAIQIN"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2010-04-08T10:31:43Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2010-04-08T10:31:43Z"]},{"key":"dc:date.issued","label":"Date","values":["2007-09-26"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["http://scholarbank.nus.edu.sg/handle/10635/13294"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["DMFCs, PEMs, AMPS, SPM, Proton Conductivity, Methanol Permeability"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://scholarbank.nus.edu.sg/bitstreams/f18a86b5-9986-40f3-a80c-daab04ae2bf7/download","http://scholarbank.nus.edu.sg/handle/10635/13294"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This thesis study is aimed at producing proton-conducting polymer electrolyte membranes (PEMs) for direct methanol fuel cells (DMFCs). 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