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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/19046

Title: Cross-linkable Sulfonated Polyimide Thin Film With High Proton Conductivity
Authors: Yao, Yuze
Hara, Mitsuo
Nagano, Shusaku
Aoki, Kentaro
Nagao, Yuki
Issue Date: 2024
Publisher: University of Montpellier
Magazine name: Conference Proceedings of STEPI-12
Volume: 12
Start page: 49
End page: 59
Abstract: Sulfonated semi-alicyclic polyimides have issues with poor mechanical and chemical stability in water. As described herein, we synthesized a new sulfonated semi-alicyclic polyimide composed of bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride (BOEDA) and 3,3'- bis-(sulfopropoxy)-4,4'-diaminobiphenyl (BSPA), of which the contained dienophile structure can undergo Diels–Alder (D-A) reaction. Facile cross-linking reaction was conducted via Fe3+- catalyzed D-A reaction between BSPA-BOEDA and silica nanoparticles (NPs) modified by (3-cyclopentadienylpropyl) triethoxyslane (CPTS). Compared with BSPA-BOEDA, the cross-linked BSPA-BOEDA-NP membrane and its thin film showed better stability in water. Humiditycontrolled grazing incidence X-ray scattering (GIXRS) revealed that an isotropic phase segregation of 2 nm-1 formed in both BSPA-BOEDA and BSPA-BOEDA-NP thin films. The BSPABOEDA and BSPA-BOEDA-NP thin films exhibited high proton conductivity of 4 × 10-2 S cm-1 and 1 × 10-2 S cm-1, respectively, under 25 °C and 95% relative humidity (RH).
Rights: This paper is posted here with permission of University of Montpellier. Copyright (C) 2024 University of Montpellier. Conference Proceedings of STEPI-12, 2023, 12, pp. 49-59.
URI: http://hdl.handle.net/10119/19046
Material Type: author
Appears in Collections:c11-1. 会議発表論文 (Conference Papers)

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