Synthesis and substituent effect of polyimide electrolyte membranes containing fluorenyl groups

Tomohiro Yasuda; Kenji Miyatake; Masahiro Watanabe

Synthesis and substituent effect of polyimide electrolyte membranes containing fluorenyl groups

Tomohiro Yasuda^*, Kenji Miyatake, Masahiro Watanabe

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

Abstract

A series of polyimide copolymers containing o-subustituted sulfonated fluorenyl groups (SPI-6) or sulfonated trimethylphenylene groups (SPI-7) were synthesized with various hydrophobic diamine comonomer. For investigation of polymer electrolyte properties, membranes were fabricated by casting from polymer solution. SPI-7 membranes showed better water stability than SPI-6 under accelerated testing conditions (at 140°C for 24 h). Flexible aliphatic chains turned out to cause lower water stability of the polyimide electrolytes. Water uptake was somewhat higher for SPI-7 than SPI-6. Both SPI-6 and SPI-7 membranes showed high proton conductivity under humidified conditions. SPI-6 TFMBZ with the ion exchange capacity (IEC) of 1.91 meq/g showed the highest proton conductivity of 10^-1 S/cm at 90% RH and 10^-3 S/cm at 20% RH.

Original language	English
Pages	5028-5029
Number of pages	2
Publication status	Published - 2006
Externally published	Yes
Event	55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan Duration: 2006 Sept 20 → 2006 Sept 22

Other

Other	55th Society of Polymer Science Japan Symposium on Macromolecules
Country/Territory	Japan
City	Toyama
Period	06/9/20 → 06/9/22

Keywords

Electrolyte
Fuel cell
Hydrolytic stability
Membrane
Proton conductivity
Sulfonated polyimide

ASJC Scopus subject areas

Engineering(all)

Cite this

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title = "Synthesis and substituent effect of polyimide electrolyte membranes containing fluorenyl groups",

abstract = "A series of polyimide copolymers containing o-subustituted sulfonated fluorenyl groups (SPI-6) or sulfonated trimethylphenylene groups (SPI-7) were synthesized with various hydrophobic diamine comonomer. For investigation of polymer electrolyte properties, membranes were fabricated by casting from polymer solution. SPI-7 membranes showed better water stability than SPI-6 under accelerated testing conditions (at 140°C for 24 h). Flexible aliphatic chains turned out to cause lower water stability of the polyimide electrolytes. Water uptake was somewhat higher for SPI-7 than SPI-6. Both SPI-6 and SPI-7 membranes showed high proton conductivity under humidified conditions. SPI-6 TFMBZ with the ion exchange capacity (IEC) of 1.91 meq/g showed the highest proton conductivity of 10-1 S/cm at 90% RH and 10-3 S/cm at 20% RH.",

keywords = "Electrolyte, Fuel cell, Hydrolytic stability, Membrane, Proton conductivity, Sulfonated polyimide",

author = "Tomohiro Yasuda and Kenji Miyatake and Masahiro Watanabe",

year = "2006",

language = "English",

pages = "5028--5029",

note = "55th Society of Polymer Science Japan Symposium on Macromolecules ; Conference date: 20-09-2006 Through 22-09-2006",

}

TY - CONF

T1 - Synthesis and substituent effect of polyimide electrolyte membranes containing fluorenyl groups

AU - Yasuda, Tomohiro

AU - Miyatake, Kenji

AU - Watanabe, Masahiro

PY - 2006

Y1 - 2006

N2 - A series of polyimide copolymers containing o-subustituted sulfonated fluorenyl groups (SPI-6) or sulfonated trimethylphenylene groups (SPI-7) were synthesized with various hydrophobic diamine comonomer. For investigation of polymer electrolyte properties, membranes were fabricated by casting from polymer solution. SPI-7 membranes showed better water stability than SPI-6 under accelerated testing conditions (at 140°C for 24 h). Flexible aliphatic chains turned out to cause lower water stability of the polyimide electrolytes. Water uptake was somewhat higher for SPI-7 than SPI-6. Both SPI-6 and SPI-7 membranes showed high proton conductivity under humidified conditions. SPI-6 TFMBZ with the ion exchange capacity (IEC) of 1.91 meq/g showed the highest proton conductivity of 10-1 S/cm at 90% RH and 10-3 S/cm at 20% RH.

AB - A series of polyimide copolymers containing o-subustituted sulfonated fluorenyl groups (SPI-6) or sulfonated trimethylphenylene groups (SPI-7) were synthesized with various hydrophobic diamine comonomer. For investigation of polymer electrolyte properties, membranes were fabricated by casting from polymer solution. SPI-7 membranes showed better water stability than SPI-6 under accelerated testing conditions (at 140°C for 24 h). Flexible aliphatic chains turned out to cause lower water stability of the polyimide electrolytes. Water uptake was somewhat higher for SPI-7 than SPI-6. Both SPI-6 and SPI-7 membranes showed high proton conductivity under humidified conditions. SPI-6 TFMBZ with the ion exchange capacity (IEC) of 1.91 meq/g showed the highest proton conductivity of 10-1 S/cm at 90% RH and 10-3 S/cm at 20% RH.

KW - Electrolyte

KW - Fuel cell

KW - Hydrolytic stability

KW - Membrane

KW - Proton conductivity

KW - Sulfonated polyimide

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M3 - Paper

AN - SCOPUS:33846160653

SP - 5028

EP - 5029

T2 - 55th Society of Polymer Science Japan Symposium on Macromolecules

Y2 - 20 September 2006 through 22 September 2006

ER -

Synthesis and substituent effect of polyimide electrolyte membranes containing fluorenyl groups

Abstract

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Keywords

ASJC Scopus subject areas

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