chemicallytechFine Chemical TechnologiesТонкие химические технологии2410-65932686-7575MIREA – Russian Technological University (RTU MIREA).10.32362/2410-6593-2026-21-1-18-29VEYWWHchemicallytech-2349Research ArticleCHEMISTRY AND TECHNOLOGY OF ORGANIC SUBSTANCESХИМИЯ И ТЕХНОЛОГИЯ ОРГАНИЧЕСКИХ ВЕЩЕСТВHydrolysis of tetraethoxysilane in various associated media of diolsГидролиз тетраэтоксисилана в ассоциированных средах предельных диолов и их эфировhttps://orcid.org/0009-0006-0243-9289БондареваА. М.BondarevaAlevtina M.

Бондарева Алевтина Михайловна, аспирант, кафедра физической химии им. Я.К. Сыркина,

119454, Москва, пр-т Вернадского, д. 78.

Alevtina M. Bondareva, Postgraduate Student, Ya.K. Syrkin Department of Physical Chemistry,

78, Vernadskogo pr., Moscow, 119454.

bondaalevtina@yandex.ruhttps://orcid.org/0000-0002-5315-6370ПашкинИ. И.PashkinIgor I.

Пашкин Игорь Иванович, к.х.н., главный специалист, кафедра химии и технологии высокомолекулярных соединений им. С.С. Медведева,

119454, Москва, пр-т Вернадского, д. 78. 

Igor I. Pashkin, Cand. Sci. (Chem.), Chief Specialist, S.S. Medvedev Department of Chemistry and Technology of Macromolecular Compounds, 

78, Vernadskogo pr., Moscow, 119454.

pashkin@mirea.ruhttps://orcid.org/0000-0002-2389-9026КрыловА. В.KrylovAlexander V.

Крылов Александр Владимирович, к.х.н., доцент, кафедра физической химии им. Я.К. Сыркина,

119454, Москва, пр-т Вернадского, д. 78. 

Scopus AuthorID: 57484351900.

Alexander V. Krylov, Cand. Sci. (Chem.), Associate Professor, Ya.K. Syrkin Department of Physical Chemistry,

78, Vernadskogo pr., Moscow, 119454.

Scopus AuthorID: 57484351900.

 

allylnmr@yandex.ruМИРЭА – Российский технологический университет (Институт тонких химических технологий им. М.В. Ломоносова)РоссияMIREA – Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)Russian Federation2026050320262111829Copyright © Bondareva A.M., Pashkin I.I., Krylov A.V., 20262026Бондарева А.М., Пашкин И.И., Крылов А.В.Bondareva A.M., Pashkin I.I., Krylov A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.finechem-mirea.ru/jour/article/view/2349Objectives

Objectives. To investigate the specific features of tetraethoxysilane (TEOS) hydrolysis in associated media of saturated diols and their esters in acidic media. Propylene- and butylene glycols and ethylcarbitol were selected as associated systems.

Methods

Methods. Association, hydrolysis, and condensation processes in the TEOS–diol system were studied by potentiometry, infrared spectroscopy, and dynamic light scattering in liquid media. The acidic environment was created by adding HCl in the amount not exceeding 0.3 wt %.

Results

Results. The hydrolysis of TEOS in associated alcohol media is limited by the reaction that yields silanol (RO)3SiOН, which further interacts with the associated diol. This results in the incorporation of (RO)3SiO groups into the hydrogen bond network of diols. This is confirmed by a decrease in the self-association of diols with a decrease in size in the diol–(RO)3SiO domains of up to 1–7 μm.

Conclusions

Conclusions. The use of diols as a reaction medium for TEOS with a low content of H2O in acidic media limits the depth of hydrolysis and condensation, which increases the possibility of esterification reactions of diol with alkoxy derivatives of silanols. The decreased number of hydroxyl groups during the transition from diols to their esters has a significant effect on the degree of association.

Цели

Цели. Исследование особенностей процесса гидролиза тетраэтоксисилана (ТЭОС) в ассоциированных средах предельных диолов и их эфиров в кислых условиях. В качестве ассоциированных систем были выбраны пропилен- и бутиленгликоль, а также этилкарбитол.

Методы

Методы. Исследование процессов ассоциации, гидролиза и конденсации в системе ТЭОС–диолы проводили методами потенциометрии, инфракрасной спектроскопии и динамического рассеяния света в жидких средах. Кислотность среды обеспечивалась добавлением не более 0.3 мас. % HCl.

Результаты

Результаты. Гидролиз ТЭОС в ассоциированных спиртовых средах лимитируется протеканием реакции образования силанола (RO)3SiOН, который в дальнейшем взаимодействует с ассоциированным диолом, что приводит к встраиванию групп (RO)3SiO в сетку водородных связей диолов. Это подтверждается снижением самоассоциации диолов с уменьшением размера в доменах диол–(RO)3SiO до 1–7 мкм.

Выводы

Выводы. Использование в качестве реакционной среды диолов для ТЭОС при малом содержании Н2О в кислых средах ограничивает глубину гидролиза и конденсации, что увеличивает возможность протекания реакций этерификации диола алкоксипроизводными силанолов. Большой эффект на степень ассоциации оказывает уменьшение числа гидроксильных групп при переходе от диолов к их эфирам.

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