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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/15728

Title: High proton conduction of organized sulfonated polyimide thin films with planar and bent backbones
Authors: Ono, Yutaro
Goto, Ryosuke
Hara, Mitsuo
Nagano, Shusaku
Abe, Takashi
Nagao, Yuki
Keywords: Lyotropic liquid crystalline (LC) property
Organized structure
Molecular ordering
Fuel cells
Issue Date: 2018-04-23
Publisher: American Chemical Society
Magazine name: Macromolecules
Volume: 51
Number: 9
Start page: 3351
End page: 3359
DOI: 10.1021/acs.macromol.8b00301
Abstract: Fast proton conduction was achieved in organized lamellar structures with in-plane oriented structure parallel to the substrate surface using a lyotropic liquid-crystalline (LC) property. Alkyl sulfonated polyimides (ASPIs) with bent main chain structure were newly synthesized to investigate relations between the higher order structure and proton transport properties. Proton conductivity of all polyimide thin films was greater than 10^<-2> S/cm^<-1>. Grazing-incidence small-angle X-ray scattering (GI-SAXS) revealed that both planar and bent ASPI thin films exhibited humidity-induced lyotropic lamellar structure. Infrared p-polarized multiple-angle incidence resolution (pMAIR) studies revealed that main chain backbones of both planar and bent ASPI thin films show an in-plane orientation parallel to the substrate surface. Results demonstrate that sulfonated alkyl side chains contribute strongly to the lyotropic LC property, which enhances molecular orderings and proton conductivity by water uptake. This study extends knowledge of the molecular design for highly proton conductive polymers with humidity-induced lyotropic LC property.
Rights: Yutaro Ono, Ryosuke Goto, Mitsuo Hara, Shusaku Nagano, Takashi Abe, Yuki Nagao, Macromolecules, 2018, 51(9), pp.3351-3359. This document is the unedited author's version of a Submitted Work that was subsequently accepted for publication in Macromolecules, copyright (c) American Chemical Society after peer review. To access the final edited and published work, see http://dx.doi.org/10.1021/acs.macromol.8b00301
URI: http://hdl.handle.net/10119/15728
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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