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Your search keyword '"Takimoto, Naohiko"' showing total 11 results
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11 results on '"Takimoto, Naohiko"'

9. Investigation of through-plane morphologies of multiblock copolymers based on poly(arylene ether sulfone)s

Author

Takamuku, Shogo, Takimoto, Naohiko, Abe, Mitsutaka, and Shinohara, Kazuhiko

Subjects
*BLOCK copolymers, *POLYETHERS, *SULFONES, *ELECTRIC conductivity, *PROTONS, *FUEL cells, *TRANSMISSION electron microscopy
Abstract

Abstract: Through-plane morphologies of multiblock copolymers based on poly(arylene ether sulfone)s were investigated by transmission electron microscopy (TEM) and through-plane conductivity measurements using a 4-probe method. The measured results showed that proton conductivity increased with a longer block length and that the optimal block length ranged from 5 to 7K. TEM cross-sectional images also supported these results, indicating that a block length of 10K is too well organized to conduct through-plane ion carriers. [Copyright &y& Elsevier]

Published
2010
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10. Surface Morphology and Proton Conduction Imaging of Nafion Membrane.

Author

Takimoto, Naohiko, Ohira, Akihiro, Takeoka, Yuko, and Rikukawa, Masahiro

Subjects
PROTONS, ATOMIC force microscopy, SCANNING probe microscopy, ATOMS, CHEMISTRY
Abstract

AC-mode atomic force microscopy (AFM) and electrochemical methods were used to identify the proton conducting regions of Nafion membrane. It was found that the surface of Nafion membrane was constructed of small hydrophobic granular domains and that protons passed through the hydrophilic regions formed in the interstices between those domains. [ABSTRACT FROM AUTHOR]

Published
2008
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