成果報告書詳細
管理番号100013796
タイトル*平成20年度中間年報 燃料電池先端科学研究事業4
公開日2009/4/24
報告書年度2008 - 2008
委託先名学校法人上智学院
プロジェクト番号P08001
部署名燃料電池・水素技術開発部
和文要約以下本編抜粋:1炭化水素系モデル電解質材料の開発本年度は、主にポリフェニレン系とポリアリールエーテル系電解質からなるブロック共重合体を炭化水素系モデル電解質材料として取り上げ、以下の項目に関して明らかにした。
英文要約Title : Fuel Cell Cutting-Edge Scientific Research Project (FY2008-2009) FY2008 Annual Report 1. Abstract The purpose of this project is to develop the model materials of hydrocarbon polymer electrolytes and to investigate the electrochemical behaviors of polymer electrolyte membranes in polymer electrolyte fuel cells by using the model materials. In this term, we have investigated the following three-points according to the research program. 2.Result and Discussions Development of model materials for hydrocarbon polymer electrolytes We focused block copolymers consisting of hydrophilic sulfonated poly(p-phenoxybenzoly-1,4-phenylene) (S-PPBP) and hydrophobic poly(arylene ether ketone) (PAEK6H), and these copolymers have been synthesized by Ni(0) coupling polymerization. Two reaction roots that were post-sulfonation and sulfonated monomer methods were attempted in order to clarify the effect of sulfonation reaction on the properties of polymer electrolytes. Insoluble block copolymers were obtained by the post-sulfonation method, which was to prepare sulfonated block copolymers by direct sulfonation of pristine materials with sulfuric acid. On the other hand, the sulfonated monomer and PAEK6H oligomer gave soluble sulfonated block copolymers (S-PPBP-b-PAEK6H). The weight average molecular weights of S-PPBP-b-PAEK6H determined by GPC were in the range of 1.24 x 105 - 1.76 x 105. The prepared membranes of S-PPBP-b-PAEK6H were more transparent and flexible with thickness in the range of 20 - 40 μm as compared with S-PPBP membrane. S-PPBP-b-PAEK6H membranes showed tensile strength of 79.9 MPa and ultimate elongation of 5.54% and maintained tensile strength of 23.2 - 30.3 MPa and ultimate elongation of 21.6 - 41.4% under 90 %RH at 80 -C. Proton conductivity in the in-plane direction of S-PPBP-b-PAEK6H membranes was measured in the range of 30 - 90 %RH at 80 -C. While S-PPBP homo polymer membranes showed higher conductivity as compared with those of S-PPBP-b-PAEK6H copolymers due to its high IEC value, the conductivity of S-PPBP-b-PAEK6H exhibited about 10-3 S cm-1 even at 30 %RH in spite of the IEC value of 1.96 meq g-1. From these results, the microstructure of S-PPBP-b-PAEK6H multiblock copolymers with continuous hydrophobic and hydrophilic domains might form the effective water transport pathway, and the flexible pendant side chains of S-PPBP block units allow high proton conductivity. Structural analysis of model materials By using atomic force microscopy, the phase separation of model materials caused by the hydrophobic-hydrophilic interaction was observed. It is found that the phase separation is influenced by the chain length of block units and ion exchange capacity and is controlled by changing the casting substrate. Evaluation under PEFC operation condition New mechanical testing and thermal analysis systems were installed to measure mechanical and thermal properties of the model materials under humidified conditions.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る