Micro-structure, membrane swelling and proton conductivity of sulfonated polyimide membranes

• Project/Area Number: 19550209
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Polymer/Textile materials
• Research Institution: Yamaguchi University
• Principal Investigator: OKAMOTO Kenichi Yamaguchi University, 大学院・理工学研究科, 教授(特命) (20029218)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2007: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 高分子機能材料 / ブロック共重合体 / スルホン化ポリイミド / ミクロ相分離構造 / プロトン伝導の異方性 / 固体高分子形燃料電池 / プロトン伝導 / ミクロ相分離 / 異方性

Research Abstract

2,2'-ビス(4-スルホフェノキシ)ベンジジンと非スルホン化ジアミンとナフタレン系テトラカルボン酸二無水物とから合成したブロック共重体は、透過電子顕微鏡観察から、親水性と疎水性層状ドメインが膜面方向に配向したミクロ相分離構造を示した。層状ドメイン構造は、膜膨潤の異方性(膜面方向に比べて膜厚方向に大きく膨潤)の増加を生じた。その結果、膜面方向のプロトン伝導度は大きく増加したが、膜厚方向の伝導度は大きく減少し、燃料電池発電性能は、ランダム共重合体に比べて、特に低加湿で大きく低下した。これを基に新規な芳香族系ブロック共重合電解質膜を開発した。

Research Products

• [Journal Article] Synthesis and properties of sulfonated multiblock copolynaphthalimides (2009)
  • Author(s): Z.Hu, Y.Yin, K.Yaguchi, N.Endo, M.Higa, K.Okamoto
  • Journal Title: Polymer Vol.50 Pages: 2933-2943
  • Peer Reviewed
• [Journal Article] Cross-Linked Sulfonated Polyimide Membranes for Polymer Electrolyte Fuel Cells (2009)
  • Author(s): N.Endo, K.Matsuda, K.Yaguchi, Z.Hu, K.Chen, M.Higa, K.Okamoto
  • Journal Title: Journal of The Electrochemical Society Vol.156(5)
  • Peer Reviewed
• [Journal Article] Synthesis and properties of sulfonated polyimides derived from bis(sulfophenoxy) benzidines (2009)
  • Author(s): Y.Sutou, Y.Yin, Z.Hu, S.Chen, H.Kita, K.Okamoto, H.Wang, H.Kawasato
  • Journal Title: J. Polym. Sci. Part A : Polym. Chem Vol.47(5) Pages: 1463-1477
  • Peer Reviewed
• [Journal Article] Synthesis and properties of novel sulfonated polyimides bearing sulfophenyl pendant groups for fuel cell application (2009)
  • Author(s): K.Chen, X.Chen, K.Yaguchi, N.Endo, M.Higa, K.Okamoto
  • Journal Title: Polymer Vol.50(2) Pages: 510-518
  • Peer Reviewed
• [Journal Article] Cross-linked Sulfonated Polyimide Membranes for Polymer Electrolyte Fuel Cells (2009)
  • Author(s): Nobutaka Endo
  • Journal Title: Journal of The Electrochemical Society 156
  • Peer Reviewed
• [Journal Article] Synthesis and properties of novel sulfonated polyimides bearing sulfophenyl pendant groups for fuel cell application (2009)
  • Author(s): Kangcheng Chen
  • Journal Title: Polymer 50 Pages: 510-518
  • Peer Reviewed
• [Journal Article] Synthesis and Properties of Sulfonated Polyimides Derived from Bis (sulfophenoxy) benzidines (2008)
  • Author(s): Yoshiki Sutou
  • Journal Title: Journal Polymer Science, Polymer Chemistry Edition 47 Pages: 1463-1477
  • Peer Reviewed
• [Journal Article] Synthesis and properties of novel sulfonated polyimides derived from naphthalenic dianhydride for fuel cell application (2008)
  • Author(s): X. Chen
  • Journal Title: J.Membr.Sci., 313 Pages: 105-119
  • Peer Reviewed
• [Journal Article] Sulfonated Polyimide Membranes for Polymer Electrolyte Fuel Cells (2008)
  • Author(s): K. Okamoto
  • Journal Title: ECS Transactions-2007 Fuel Cell Seminar&Exposition 12(印刷中)
  • NAID: 130005053010
  • Peer Reviewed
• [Presentation] スルホン化ブロック/ブロック共重合体ポリイミドの合成と物性 (2008)
  • Author(s): 胡朝霞、岡本健一, ほか
  • Organizer: 第57回高分子討論会
  • Place of Presentation: 大阪
  • Year and Date: 2008-09-24
• [Presentation] Sulfonated Polyimide Membranes for Polymer Electrolyte Fuel Cells (2008)
  • Author(s): Kenichi Okamoto
  • Organizer: International Congress on Membranes and Membrane Processes (ICOM2008)
  • Place of Presentation: ホノルル(米国)
  • Year and Date: 2008-07-14
• [Presentation] Sulfonated Polyimide (SPI) Membranes for Polymer Electrolyte Fuel Cells (2008)
  • Author(s): 岡本健一, ほか
  • Organizer: International Congress on Membranes and Membrane Processes 2008
  • Place of Presentation: ホノルル
  • Year and Date: 2008-07-12
• [Presentation] スルホン化ポリイミド系高分子電解質膜の開発と燃料電池への応用、ポリマーフロンティア21 (2008)
  • Author(s): 岡本健一
  • Organizer: 高分子学会
  • Place of Presentation: 東京
  • Year and Date: 2008-04-17
• [Presentation] スルホン化ポリイミドを用いる固体高分子形燃料電池の発電特性と耐久性 (2007)
  • Author(s): 松田 康壮
  • Organizer: 第48回電池討論会
  • Place of Presentation: 福岡国際会議場
  • Year and Date: 2007-11-13
• [Presentation] Sulfonated Polyimide Membranes for Polymer Electrolyte Fuel Cells (2007)
  • Author(s): 岡本健一, ほか
  • Organizer: 2007 Fuel Cell Seminar & Exposition
  • Place of Presentation: San Antonio
  • Year and Date: 2007-10-16