vuzbiochemiИзвестия вузов. Прикладная химия и биотехнологияProceedings of Universities. Applied Chemistry and Biotechnology2227-29252500-1558ИРНИТУ10.21285/achb.1023XXODLBvuzbiochemi-1634Research ArticleХИМИЧЕСКИЕ НАУКИCHEMICAL SCIENCESСинтез и характеристика новых протонообменных мембран на основе поли-1-винил-1,2,4-триазола и пиридинсульфокислотыSynthesis and characterization of novel proton-exchange membranes based on poly-1-vinyl-1,2,4-triazole and pyridinesulfonic acidhttps://orcid.org/0000-0002-1609-4924ЛебедеваО. В.LebedevaO. V.

Лебедева Оксана Викторовна, д.х.н., профессор, доцент

664074, г. Иркутск, ул. Лермонтова, 83

Oksana V. Lebedeva, Dr. Sci. (Chemistry), Professor, Associate Professor

83, Lermontov St., Irkutsk, 664074

lebedeva@istu.eduhttps://orcid.org/0000-0003-2367-8204РаскуловаТ. В.RaskulovaT. V.

Раскулова Татьяна Валентиновна, д.х.н., доцент, заведующий кафедрой

665835, г. Ангарск, ул. Чайковского, 60

Tatyana V. Raskulova, Dr. Sci. (Chemistry), Associate Professor, Head of the Department

60, Chaikovsky St., Angarsk, 665835

raskulova@list.ruhttps://orcid.org/0000-0001-9220-9765СипкинаЕ. И.SipkinaE. I.

Сипкина Евгения Иннокентьевна, к.х.н., доцент

664074, г. Иркутск, ул. Лермонтова, 83

Evgenya I. Sipkina, Cand. Sci. (Chemistry), Associate Professor

83, Lermontov St., Irkutsk, 664074

evgiv84@mail.ruШакиртовА. М.ShakirtovA. M.

Шакиртов Алексей Маратович, аспирант

664074, г. Иркутск, ул. Лермонтова, 83

Alexey M. Shakirtov, Postgraduate Student

83, Lermontov St., Irkutsk, 664074

Kashaggg@yandex.ruhttps://orcid.org/0000-0001-7889-0574ШаглаеваН. С.ShaglaevaN. S.

Шаглаева Нина Савельевна, д.х.н., профессор, профессор

664074, г. Иркутск, ул. Лермонтова, 83

Nina S. Shaglaeva, Dr. Sci. (Chemistry), Professor, Professor

83, Lermontov St., Irkutsk, 664074

ShaglaevaNS@yandex.ruhttps://orcid.org/0009-0002-7228-5845КовальЕ. Т.KovalE. T.

Коваль Елизавета Тимофеевна, магистрант

664074, г. Иркутск, ул. Лермонтова, 83

Elizaveta T. Koval, Master’s Student

83, Lermontov St., Irkutsk, 664074

Koval.l1za@yandex.ruhttps://orcid.org/0009-0003-4157-4182ДаниловаА. С.DanilovaA. S.

Данилова Арина Сергеевна, магистрант

664074, г. Иркутск, ул. Лермонтова, 83

Arina S. Danilova, Master’s Student

83, Lermontov St., Irkutsk, 664074

ms.d.arina2003@mail.ruhttps://orcid.org/0009-0008-9395-4263ПрокофьевА. И.ProkofevA. I.

Прокофьев Александр Игоревич, магистрант

664074, г. Иркутск, ул. Лермонтова, 83

Alexander I. Prokofev, Master’s Student

83, Lermontov St., Irkutsk, 664074

prokofiev.aleksandr03@mail.ruhttps://orcid.org/0000-0003-3794-7540КузнецоваН. П.KuznetsovaN. P.

Кузнецова Надежда Петровна, к.х.н., старший научный сотрудник

664033, г. Иркутск, ул. Фаворского, 1

Nadezhda P. Kuznetsova, Cand. Sci. (Chemistry), Senior Researcher

1, Favorsky St., Irkutsk, 664033

nkuznetsova@irioch.irk.ruhttps://orcid.org/0000-0003-3833-9002ПрозороваГ. Ф.ProzorovaG. F.

Прозорова Галина Фирсовна, д.х.н., ведущий научный сотрудник

664033, г. Иркутск, ул. Фаворского, 1

Galina F. Prozorova, Dr. Sci. (Chemistry), Lead Researcher

1, Favorsky St., Irkutsk, 664033

prozorova@irioch.irk.ruИркутский национальный исследовательский технический университетРоссияIrkutsk National Research Technical UniversityRussian FederationАнгарский государственный технический университетРоссияAngarsk State Technical UniversityRussian FederationИркутский институт химии им. А.Е. Фаворского СО РАНРоссияA.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of SciencesRussian Federation2026020420261611629Copyright © Лебедева О.В., Раскулова Т.В., Сипкина Е.И., Шакиртов А.М., Шаглаева Н.С., Коваль Е.Т., Данилова А.С., Прокофьев А.И., Кузнецова Н.П., Прозорова Г.Ф., 20262026Лебедева О.В., Раскулова Т.В., Сипкина Е.И., Шакиртов А.М., Шаглаева Н.С., Коваль Е.Т., Данилова А.С., Прокофьев А.И., Кузнецова Н.П., Прозорова Г.Ф.Lebedeva O.V., Raskulova T.V., Sipkina E.I., Shakirtov A.M., Shaglaeva N.S., Koval E.T., Danilova A.S., Prokofev A.I., Kuznetsova N.P., Prozorova G.F.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vuzbiochemi.elpub.ru/jour/article/view/1634

Целью настоящей работы являлось впервые проведенное получение и комплексное исследование кислотно-основных ионообменных мембран на основе поли-1-винил-1,2,4-триазола, пиридинсульфокислоты и поливинилового спирта, сшитого щавелевой кислотой. В ходе работы установлена прямая зависимость ключевых физико-химических свойств материала от соотношения полимерных компонентов. Полученные образцы мембран проявляют высокую термическую и окислительную стабильность. Показано, что термическая стабильность мембран увеличивается с ростом содержания поли-1-винил-1,2,4-триазола, достигая температур начала деструкции в 340 °C, при этом они демонстрируют высокую устойчивость к окислительной деградации в агрессивной среде реактива Фентона. Мембраны теряют вес с увеличением времени, через 5 ч потери веса для поли-1-винил-1,2,4-триазола с пиридинсульфокислотой (20:80), (50:50), (80:20) и мембраны Нафион 212® составляли 25, 21, 14 и 5% соответственно. Функциональные характеристики, такие как водопоглощение, ионообменная емкость и протонная проводимость, напротив, существенно возрастают при повышении доли пиридинсульфокислоты. Максимальная удельная электропроводность материала в условиях 80 °C и относительной влажности 75% достигает 250 мСм/см. Изучение механических свойств показало, что увеличение содержания пиридинсульфокислоты в составе приводит к повышению эластичности (относительное удлинение при разрыве возрастает до 54%) и снижению модуля упругости (до 50 МПа). Полученные результаты показывают возможность целенаправленного конструирования и настройки свойств данных мембран до значений, превышающих показатели коммерческой мембраны Нафион 212®, что определяет перспективность их применения в качестве протонообменных материалов в электрохимических устройствах, включая топливные элементы.

In this work, acid-base ion-exchange membranes based on poly(1-vinyl-1,2,4-triazole), pyridinesulfonic acid, and polyvinyl alcohol cross-linked with oxalic acid were fabricated and characterized for the first time. A direct relationship between the key physicochemical properties of the membranes and the ratio of polymer components is established. The obtained materials exhibit high thermal and oxidative stability. Their thermal stability was shown to increase with an increase in the poly(1-vinyl-1,2,4-triazole) content, with degradation onset temperatures reaching 340 °C. The membranes also demonstrate high resistance to oxidative degradation in the aggressive environment of Fenton’s reagent. Over time, a gradual weight loss is observed. Thus, following 5 h, the weight losses for poly (1-vinyl-1,2,4-triazole) with pyridinesulfonic acid (20:80), (50:50), (80:20) and the Nafion 212® membrane were 25, 21, 14, and 5%, respectively. Conversely, functional characteristics – such as water absorption, ion-exchange capacity, and proton conductivity – increased significantly with an increase in the content of pyridinesulfonic acid. The maximum specific electrical conductivity of the material reached 250 mS/cm at 80 °C and a relative humidity of 75%. In terms of mechanical properties, an increase in the content of pyridine sulfonic acid leads to an increase in elasticity (elongation at break increases to 54%) and a decrease in elastic modulus (to 50 MPa). These results demonstrate the feasibility of targeted design and property tuning of these membranes to achieve performance exceeding that of the commercial Nafion 212® membrane, making them promising candidates for use as proton-exchange materials in electrochemical devices, including fuel cells.

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The authors declare that there are no conflicts of interest present.