Biodegradable interpolycomplexes for anti-erosion stabilization of soil and sand

Novoskoltseva, O.A.; Belov, A.A.; Loiko, N.G.; Nikolaev, Y.A.; Panova, I.G.; Yaroslavov, A.A.

Авторы: Novoskoltseva Olga A., Belov Andrey A., Loiko Nataliya G., Nikolaev Yury A., Panova Irina G., Yaroslavov Alexander A.
Журнал: Polymers
Том: 14
Номер: 24
Год издания: 2022
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 1
Последняя страница: 13
Номер статьи: 5383
DOI: 10.3390/polym14245383
Аннотация: A linear anionic polysaccharide, sodium alginate, electrostatically interacts with a cationic polysaccharide, quaternized hydroxyethyl cellulose ethoxylate, in aqueous solution, thusgiving an interpolyelectrolyte complex. Aqueous solutions of the initial polysaccharides and polycomplexes with an excess of the cationic or anionic polymers were used for the stabilization of soiland sand against water erosion. Physicochemical, mechanical and biological properties of thepolymers and coatings were characterized by gravimetric analysis, viscosimetry, mechanicalstrength assessment, cell viability, and cell-mediated degradation with the following main conclusions. (a) Non-stoichiometric polycomplexes with an excess of cationic or anionic units (“cationic”and “anionic” polycomplexes, respectively) form transparent solutions or stable-in-time dispersions. (b) The complexation results in a decrease in the viscosity of polymer solutions. (c) A complete dissociation of polycomplexes to the initial components is achieved in a 0.2 M NaCl solution.(d) Soil/sand treatment with 1 wt% aqueous solutions of polymers or polycomplexes and furtherdrying lead to the formation of strong composite coatings from polymer(s) and soil/sand particles.(e) Cationic polycomplexes form stronger coatings in comparison with anionic polycomplexes. (f)The polymer–soil coatings are stable towards re-watering, while the polymer–sand coatings showa much lower resistance to water. (g) The individual polysaccharides demonstrate a negligibletoxicity to Gram-negative and Gram-positive bacteria and yeast. (h) The addition of Bacillus subtilisculture initiates the degradation of the polysaccharides and polycomplexes. (i) Films from polysaccharides and polycomplexes decompose down to small fragments after being in soil for 6weeks. The results of the work are of importance for constructing water-resistant, low toxicity andbiodegradable protective coatings for soil and sand.
Добавил в систему: Новоскольцева Ольга Александровна

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Biodegradable interpolycomplexes for anti-erosion stabilization of soil and sandстатья

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