danДоклады Национальной академии наук БеларусиDoklady of the National Academy of Sciences of Belarus1561-83232524-2431The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8323-2021-65-4-431-438dan-990Research ArticleХИМИЯCHEMISTRYВлияние давления при формировании селективного слоя на структуру и свойства динамических композиционных мембран для первапорацииPressure effect during the formation of a selective layer on the structure and performance of dynamic composite membranes for pervaporationБуртьЕ. С.BurtsK. S.

Бурть Екатерина Сергеевна – мл. науч. сотрудник, аспирант

ул. Сурганова, 13, 220072, Минск

Burts Katsiaryna S. – Junior researcher, Postgraduate student

13, Surganov Str., 220072, Minsk 

katyaburt@gmail.comПлискоТ. В.PliskoT. V.

Плиско Татьяна Викторовна – канд. хим. наук, доцент, заведующая лабораторией

ул. Сурганова, 13, 220072, Минск

Plisko Tatiana V. – Ph. D. (Chemistry), Associate professor, Head of the Laboratory

13, Surganov Str., 220072, Minsk 

plisko.v.tatiana@gmail.comБильдюкевичА. В.BildyukevichA. V.

Бильдюкевич Александр Викторович – академик, д-р хим. наук, профессор, директор

ул. Сурганова, 13, 220072, Минск

Bildyukevich Alexandr V. – Academician, D. Sc. (Chemistry), Professor, Director

13, Surganov Str., 220072, Minsk 

uf@ifoch.bas-net.byЛиГ.LiG.

Ли Грант – аспирант

ул. Гагарина, 7, 87-100, Торунь

Li Guoqiang – Postgraduate student

7, Gagarin Str., 87-100, Torun 

grantli@doktorant.umk.plКуяваИ.KujawaJ.

Куява Иоанна – д-р хим. наук, доцент

ул. Гагарина, 7, 87-100, Торунь

Kujawa Joanna – D. Sc. (Chemistry), Associate professor

7, Gagarin Str., 87-100, Torun 

joanna.kujawa@umk.plШишонокМ. В.ShishonokM. V.

Шишонок Маргарита Валентиновна – канд. хим. наук, доцент

ул. Ленинградская, 14, 220006, Минск

Shishonok Margarita V. – Ph. D. (Chemistry), Associate professor

14, Leningradskaya Str., 220006, Minsk 

999250@gmail.comКуявскийВ.KujawskiW.

Куявский Войцех – д-р хим. наук, профессор, заведующий кафедрой

ул. Гагарина, 7, 87-100, Торунь

Kujawski Wojciech – D. Sc. (Chemistry), Professor, Head of the Department

7, Gagarin Str., 87-100, Torun 

wkujawski@umk.plИнститут физико-органической химии Национальной академии наук БеларусиInstitute of Physical Organic Chemistry of the National Academy of Sciences of BelarusУниверситет им. Николая Коперника в ТорунеNicolaus Copernicus University in ToruńБелорусский государственный университетBelarusian State University202101092021654431438Copyright © Бурть Е.С., Плиско Т.В., Бильдюкевич А.В., Ли Г., Куява И., Шишонок М.В., Куявский В., 20212021Бурть Е.С., Плиско Т.В., Бильдюкевич А.В., Ли Г., Куява И., Шишонок М.В., Куявский В.Burts K.S., Plisko T.V., Bildyukevich A.V., Li G., Kujawa J., Shishonok M.V., Kujawski W.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://doklady.belnauka.by/jour/article/view/990

Композиционные мембраны для первапорации были получены методом формирования селективного слоя на основе сшитого поливинилового спирта (ПВС) на поверхности пористой мембраны-подложки в динамическом режиме (ультрафильтрации растворов ПВС). Установлено, что повышение давления приводит к увеличению толщины селективного слоя композиционных мембран; при этом их контактный угол смачивания, удельная производительность, содержание воды в пермеате в процессе первапорации смеси этанол/вода 90/10 изменяются экстремально с максимумом при 3–4 атм в зависимости от концентрации раствора ПВС. Экстремальная зависимость краевого угла смачивания, коэффициента разделения и проницаемости композиционных мембран объясняется процессами уплотнения полимерной матрицы-подложки под действием трансмембранного давления и ее релаксации после снятия давления. При использовании повышенных давлений (более 3–4 атм) релаксация полимерной матрицы приводит к появлению микродефектов в результате деформации сформированного селективного слоя.

Composite membranes for pervaporation were prepared by forming a selective layer based on cross-linked polyvinyl alcohol (PVA) on the porous membrane-substrate surface in the dynamic mode (via PVA solution ultrafiltration). It was found that the pressure growth results in increasing the thickness of the composite membrane selective layer. Composite membrane contact angle, flux, water content in permeate in ethanol/water (mass ratio 90/10) pervaporation were revealed to have maximum values at 3–4 atm depending on the PVA concentration in the feed solution. It was shown that the revealed dependence of the contact angle, selectivity, and permeability on the pressure of the selective layer formation is due to the compaction of the polymer matrix-substrate under the action of the transmembrane pressure and its relaxation after pressure release. When using elevated pressures (more than 3–4 atm), the relaxation of the polymer matrix causes the microdefect to form as a result of deformation of the selective layer.

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