The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules

Polyelectrolyte microcapsules, which are obtained by the method of alternate adsorption of oppositely charged polyelectrolytes onto colloidal particles of micron size, are widely used in science and industry. Nevertheless, the properties of microcapsules are still poorly understood. In particular, t...

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Autores principales:	Alexey V. Dubrovskii, Aleksandr L. Kim, Egor V. Musin, Bulat R. Ramazanov, Sergey A. Tikhonenko
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polyelectrolyte microcapsules microcapsules buffer capacity polyelectrolyte Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/959de3786bfc4c418fe1d47575d88214
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spelling	oai:doaj.org-article:959de3786bfc4c418fe1d47575d882142021-11-25T18:49:30ZThe Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules10.3390/polym132240262073-4360https://doaj.org/article/959de3786bfc4c418fe1d47575d882142021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/4026https://doaj.org/toc/2073-4360Polyelectrolyte microcapsules, which are obtained by the method of alternate adsorption of oppositely charged polyelectrolytes onto colloidal particles of micron size, are widely used in science and industry. Nevertheless, the properties of microcapsules are still poorly understood. In particular, there is no information in the literature on the buffer capacity. However, information on the presence of a buffer capacity and an understanding of its mechanisms can both simplify the use of microcapsules and expand the scope of their application. In this regard, the buffer capacity of various types of microcapsules was studied. It was found that polyelectrolyte microcapsules consisting of polyallylamine, and polystyrene sulfonate have a buffer capacity. In addition, in an acidic medium, the buffer capacity of microcapsules containing BSA is significantly greater than that of microcapsules without protein. This is due to the fact that BSA contributes to the buffering of microcapsules. Differences in the behaviour of the buffer capacity of microcapsules with the composition (PAH/PSS)<sub>3</sub> and (PSS/PAH)<sub>3</sub> were found. In addition, a hypothesis has been proposed that regions of unbound polyallylamine are responsible for the buffering properties of polyelectrolyte microcapsules. This hypothesis is confirmed by the fact that incubation of microcapsules in 0.5 M NaCl increases the amount of unbound polyallylamine, which leads to an increase in the buffer capacity of microcapsules at alkaline pH values higher than the buffer capacity of capsules in an aqueous solution.Alexey V. DubrovskiiAleksandr L. KimEgor V. MusinBulat R. RamazanovSergey A. TikhonenkoMDPI AGarticlepolyelectrolyte microcapsulesmicrocapsulesbuffer capacitypolyelectrolyteOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 4026, p 4026 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyelectrolyte microcapsules microcapsules buffer capacity polyelectrolyte Organic chemistry QD241-441
spellingShingle	polyelectrolyte microcapsules microcapsules buffer capacity polyelectrolyte Organic chemistry QD241-441 Alexey V. Dubrovskii Aleksandr L. Kim Egor V. Musin Bulat R. Ramazanov Sergey A. Tikhonenko The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules
description	Polyelectrolyte microcapsules, which are obtained by the method of alternate adsorption of oppositely charged polyelectrolytes onto colloidal particles of micron size, are widely used in science and industry. Nevertheless, the properties of microcapsules are still poorly understood. In particular, there is no information in the literature on the buffer capacity. However, information on the presence of a buffer capacity and an understanding of its mechanisms can both simplify the use of microcapsules and expand the scope of their application. In this regard, the buffer capacity of various types of microcapsules was studied. It was found that polyelectrolyte microcapsules consisting of polyallylamine, and polystyrene sulfonate have a buffer capacity. In addition, in an acidic medium, the buffer capacity of microcapsules containing BSA is significantly greater than that of microcapsules without protein. This is due to the fact that BSA contributes to the buffering of microcapsules. Differences in the behaviour of the buffer capacity of microcapsules with the composition (PAH/PSS)<sub>3</sub> and (PSS/PAH)<sub>3</sub> were found. In addition, a hypothesis has been proposed that regions of unbound polyallylamine are responsible for the buffering properties of polyelectrolyte microcapsules. This hypothesis is confirmed by the fact that incubation of microcapsules in 0.5 M NaCl increases the amount of unbound polyallylamine, which leads to an increase in the buffer capacity of microcapsules at alkaline pH values higher than the buffer capacity of capsules in an aqueous solution.
format	article
author	Alexey V. Dubrovskii Aleksandr L. Kim Egor V. Musin Bulat R. Ramazanov Sergey A. Tikhonenko
author_facet	Alexey V. Dubrovskii Aleksandr L. Kim Egor V. Musin Bulat R. Ramazanov Sergey A. Tikhonenko
author_sort	Alexey V. Dubrovskii
title	The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules
title_short	The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules
title_full	The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules
title_fullStr	The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules
title_full_unstemmed	The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules
title_sort	discovery of the buffer capacity of various types of polyelectrolyte microcapsules
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/959de3786bfc4c418fe1d47575d88214
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The Discovery of the Buffer Capacity of Various Types of Polyelectrolyte Microcapsules

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