Development of soft materials for flexible thermoelectric conversion element

2014 Fiscal Year Final Research Report

• Project/Area Number: 24550212
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Functional materials/Devices
• Research Institution: Shimane University
• Principal Investigator: YAMAGUCHI Isao 島根大学, 総合理工学研究科(研究院), 教授 (00272708)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 導電性高分子 / 熱電変換素子 / 電気伝導度 / ゼーベック係数

Outline of Final Research Achievements

(1) n-Type π-conjugated polymers with a 1,2,4-triazole ring substituted by a benzo-15-crown 5-ether (benzo15C5) subunit at the 4-position of the 1,2,4-triazole ring were synthesized by organometallic polycondensations. The electric conductivities of the polymers were increased by n-doping with sodium naphthalenide. The polymers with the benzo15C5 subunit exhibited a considerably higher stability of the n-doping state in air than did those without this subunit.
(2) Sodium salts of poly(aniline-5-sulfonic acid) (PAS), PAS(Na)s, were obtained by the reaction of PAS with NaOH in water. The degree of sodium sulfonation of the PAS(Na)s depended on the feed amount of NaOH. Thermoelectric measurements of the PAS(Na)s suggested that the majority of carriers were holes. The Seebeck coefficients (S’s) of the PAS(Na)s increased as the degree of sodium sulfonation of the polymers increased.

Free Research Field

高分子化学