INVESTIGATION OF THE PROCESS OF CHEMICAL CROSSLINKING OF NA-CMC POLYVALENT METAL IONS
UDC 547.458.88+664.292
Abstract
This article is devoted to the study of the Na-CMC structuring process under various conditions: structuring with polyvalent metal ions, structuring with polyvalent metal ions in the presence of polybasic acids. Structuring in a Na-CMC solution was investigated by adding polyvalent metal ions to it at various ratios Me+p / COO-, pH, which allowed us to characterize the structuring process as a reaction of macromolecules with low molecular weight compounds.It was found that the probability of intermacromolecular crosslinking, responsible for gelation, increases with an increase in the initial concentration of Na-CMC solution and with the additional presence of polybasic acids. When salts of polyvalent metals interact with solutions of polybasic acids in the presence of a 2N NaOH solution, their complex salts are formed.Titration calculations and IR spectra of dried salts confirmed the conclusion made about the formation of salts of structure I, II, III, IV. Crosslinking of Na-CMC has been shown to occur via compounds of the M2+ (3+) - OOS-R-type. It has been established that strong, transparent jellies are formed by trivalent metal ions, divalent metal ions also form brittle, cloudy jellies that stratify during a day.A suggestion has been made that the main reaction during gelation of the Na-CMC solution is the interaction of -COOH groups along the chain of the Na-CMC macromolecule with the Al+3 salt and citric acid of structure III. The role of citric acid is that it is a transverse bridge in the binding of Na-CMC macromolecules. During the process of chemical crosslinking, the system turns from a fluid state into a non-fluid one, and the dynamic viscosity of the system increases from 3.548 Pa·s to 1585 Pa·s.
Downloads
Metrics
References
Filatova A.S., Turayev A.S., Azimova L.B. Khimiya rastitel'nogo syr'ya, 2020, no. 1, pp. 33–39. DOI: 10.14258/jcprm.2020015485. (in Russ.).
Larionov L.P., Khonina T.G., Kipper S.N., Zabokritskiy N.A., Boyakovskaya T.G. i dr. Dostizheniya i perspektivy v oblasti sozdaniya novykh lekarstvennykh sredstv: sbornik nauchnykh trudov. [Achievements and prospects in the devel-opment of new drugs: collection of scientific papers]. Perm', 2007, pp. 356–359. (in Russ.).
Baranova O.A., Kuz'min N.I., Samsonova T.I., Rebetskaya I.S., Petrova O.P. Khimicheskiye volokna, 2011, no. 1, pp. 74–86. (in Russ.).
Filatova A.V., Turayev A.S., Dzhurabayev D.T. Khimiya i khimicheskaya tekhnologiya, 2019, no. 3, pp. 52–55. (in Russ.).
Filatova A.V., Dzhurabayev D.T. Uzbekskiy khimicheskiy zhurnal, 2019, no. 5, pp. 80–84. (in Russ.).
Lopatin V.V., Askadskiy A.A. Poliakrilamidnyye gidrogeli v meditsine. [Polyacrylamide hydrogels in medicine]. Mos-cow, 2004, 264 p. (in Russ.).
Rogovina L.Z., Vasil'yev V.G., Braudo Ye.Ye. Vysokomolekulyarnyye soyedineniya, 2008, vol. 50, no. 7, pp. 1397–1406. DOI: 10.1007/s10692-018-9951-x. (in Russ.).
Yergozhin Ye.Ye., Zezin A.B., Suleymenov I.E., Mun G.A. Gidrofil'nyye polimery v nanotekhnologii i nanoelektronike. [Hydrophilic polymers in nanotechnology and nanoelectronics]. Almaty – Moscow, 2008, 214 p. (in Russ.).
Sareen R., Kumar S., Gupta G.D. Curr. Drug. Deliv., 2011, vol. 8, no. 4, p. 407. DOI: 10.3109/10717544.2013.838712.
Khaytmetova S.B., Turayev A.S. Uzbekskiy khimicheskiy zhurnal, 2011, special. release, pp. 12–15. (in Russ.).
Bazarnova N.G. Khimiya drevesiny i yeye osnovnykh komponentov: metod. posobiye. [Chemistry of wood and its main components: method. allowance]. Barnaul, 2002, 52 p. (in Russ.).
Bezhin A.I., Maystrenko A.N., Lipatov V.A. Vestnik novykh meditsinskikh tekhnologiy, 2011, vol. 18, no. 3, pp. 152. (in Russ.).
Vorob'yeva V.M. 35 let farmatsevticheskomu fakul'tetu AGMU: itogi i perspektivy. Materialy nauchno-prakticheskoy konferentsii, posvyashchennoy 35-letiyu farmatsevticheskogo fakul'teta. [35 years of the pharmaceutical faculty of AS-MU: results and prospects. Materials of the scientific-practical conference dedicated to the 35th anniversary of the Facul-ty of Pharmacy]. Barnaul, 2010, pp. 54–58. (in Russ.).
Turaev A.S., Muradov E.A., Filatova A.V. European polymer federation, 2001, p. 635.
GOST 29188.2-2014. Produktsiya parfyumerno-kosmeticheskaya. Metod opredeleniya vodorodnogo pokazatelya pH. [GOST 29188.2-2014. Perfumery and cosmetic products. Method for determining the pH value]. Moscow, 2016, 8 p. (in Russ.).
Khadzhiyeva Z.D., Zilfikarov I.N., Teunova Ye.A. Nauchnyye vedomosti BelGU. Seriya: Meditsina. Farmatsiya, 2010, vol. 22 (93), no. 12/2, pp. 58–61. (in Russ.).
Filatova A.V., Dzhurabayev D.T. Materialy Mezhdunarodnoy konferentsii molodykh uchonykh po fundamental'nym naukam. [Materials of the International Conference of Young Scientists in Basic Sciences]. Moscow, 2006, vol. 2, p. 57. (in Russ.).
Mukhamedzhanova M.Yu., Filatova A.V., Dzhurabayev D.T., Turayev A.S. Khimiya rastitel'nogo syr'ya, 2012, no. 1, pp. 51–60. (in Russ.).
Ivanova V.Yu., Chevela V.V., Sal'nikov Yu.I. i dr. Struktura i dinamika molekulyarnykh sistem: sbornik statey. [Struc-ture and dynamics of molecular systems: collection of articles]. Moscow, 2005, pp. 305–308. (in Russ.).
Ivanova V.Yu., Bezryadin S.G., Chevela V.V. i dr. Struktura i dinamika molekulyarnykh sistem: sbornik statey. [Struc-ture and dynamics of molecular systems: collection of articles]. Ufa, 2006, pp. 356–359. (in Russ.).
Chevela V.V., Ivanova V.Yu., Semenov V.E. i dr. Tezisy dokladov XXI Mezhdunarodnoy Chutayevskoy konferentsii po koordinatsionnoy khimii. [Abstracts of the XXI International Chutaev Conference on Coordination Chemistry]. Kiev, 2003, p. 404. (in Russ.).
![](http://journal.asu.ru/public/journals/1/article_6952_cover_ru_RU.png)
Copyright (c) 2020 chemistry of plant raw material
![Creative Commons License](http://i.creativecommons.org/l/by/4.0/88x31.png)
This work is licensed under a Creative Commons Attribution 4.0 International License.
This work is licensed under a Creative Commons Attribution 4.0 International License.
The authors, which are published in this journal, agree to the following conditions:
1. Authors retain the copyright to the work and transfer to the journal the right of the first publication along with the work, at the same time licensing it under the terms of the Creative Commons Attribution License, which allows others to distribute this work with the obligatory indication of the authorship of this work and a link to the original publication in this journal .
2. The authors retain the right to enter into separate, additional contractual agreements for the non-exclusive distribution of the version of the work published by this journal (for example, to place it in the university depository or to publish it in a book), with reference to the original publication in this journal.
3. Authors are allowed to post their work on the Internet (for example, in a university repository or on their personal website) before and during the review process of this journal, as this may lead to a productive discussion, as well as more links to this published work.