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Structure, thermal properties and proton conductivity of the sulfonated polyphenylquinoxalinesстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Pisareva Аnna V., Belomoina Natalia М., Bulycheva Еlena G., Ilyin Мikhail М., Postnova Evgeniya Y., Pisarev Rostislav V., Zyubinа Tatiana S., Zyubin Аlexander S., Karelin Alexander I., Dobrovolsky Yury А.
- Журнал: Membranes
- Том: 12
- Номер: 11
- Год издания: 2022
- Издательство: MDPI Publishing
- Местоположение издательства: Basel, Switzerland, Switzerland
- Номер статьи: 1095
- DOI: 10.3390/membranes12111095
- Аннотация: This paper briefly reviews the results of scientific research on the proton conductivity of sulfonated polyphenylquinoxalines. Synthesis, structure (IR spectroscopy, SEM, quantum‐chemical modeling, molecular weight distribution), moisture capacity, thermal properties, and proton conductivity of sulfonated polyphenylquinoxalines (sulfur content 2.6, 4.2, 5.5, and 7%) were studied. The relative stable configurations of sulfonated polyphenylquinoxalines with different positions of benzene rings and sulfogroups with the help of quantum chemical modeling were modeled. Sulfonation of the starting polyphenylquinoxalines was confirmed by IR spectroscopy and elemental analysis. The SEM method was used to study the surface of sulfonated polyphenylquinoxalines, and sulfonation regions were found. It was shown that sulfonated polyphenylquinoxalines contain water and are stable up to 250 °C; on further heating, the decomposition of the sulfogroups occurs. The conductivity of the obtained polymer electrolytes was studied by impedance spectroscopy, andlong‐term tests were carried out. It is shown that the proton conductivity at an ambient humidityof 98 rel. % reaches values 10−6–10−3 S/cm depending on the degree of sulfonation. It was shown that even after long‐term storage in air (7 years), samples of sulfonated polyphenylquinoxalines with a high sulfur content of 7% at 98% air humidity have a conductivity of 8 . 10−4 S/cm.
- Добавил в систему: Беломоина Наталия Михайловна