Biological Films Based on Oxidized Bacterial Сellulose: Synthesis, Structure, and Properties

Bychkovsky, Pavel M.; Yurkshtovich, T. L.; Голуб, Н. В.; Solomevich, Sergey O.; Yurkshtovich, N. K.; Adamchik, D. A.

doi:10.1134/s156009041904002x

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…Периодатное окисление ХЦ. Предварительной стадией периодатного окисления полисахарида являлось инклюдирование влажной ХЦ ацетоном, затем циклогексаном [15]. Далее 0.02 моль инклюдированной целлюлозы помещали в склянку из темного стекла вместимостью 500 мл, приливали 200 мл ацетатного буфера с рН 4.25 и 0.2 н раствора NaIO4 при молярном соотношении ХЦ : IO4 -=1 : 1.5.…”

Section: экспериментальная частьunclassified

Comparative Studies of the Chemical Interaction of Guanidine With Dialdehyde Cellu-Lose and Pectin

Akhmedov¹,

Шомуротов²,

Тураев³

2022

JCPRM

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The presence of reactive aldehyde groups in the elementary units of dialdehyde polysaccharides enables to enter easily into a condensation reaction with reagents containing primary amino groups in the structure. This naturally expands the possibilities of obtaining new derivatives of polysaccharides with physiologically active properties. In this study, we synthesized azomethine derivatives of cellulose and pectin differing in the degree of substitution and the content of the nucleophilic reagent in the composition of the reaction products through chemical interaction of guanidine with macromolecules of dialdehyde polysaccharides. Therefore, regularities of the reaction of nucleophilic substitution of aldehyde groups of oxidized polysaccharides with guanidine were revealed. It was found that the interaction of guanidine amino groups with oxidized pectin in contrast to dialdehyde cellulose occurs through the formation of azomethine and ionic bonds. Moreover, the possibility of obtaining guanidine-containing derivatives of cellulose and pectin with different structural characteristics by varying the molar ratio of the nucleophile and the oxidation state of the starting polysaccharides was proved. The composition and structure of the reaction products were studied by physicochemical methods of analysis. The stability and rate of cleavage of guanidine groups from the macromolecules of dialdehyde cellulose and dialdehyde pectin were studied by hydrolysis of the synthesized samples in acidic and alkaline media.

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Section: экспериментальная частьunclassified

Comparative Studies of the Chemical Interaction of Guanidine With Dialdehyde Cellu-Lose and Pectin

Akhmedov¹,

Шомуротов²,

Тураев³

2022

JCPRM

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“…1, pp. [7][8][9][10][11][12][13][14][15][16] Keywords: carboxymethylcellulose, dioxydine, thermal degradation, hydrolysis, rheological characteristics For citation. Yurkshtovich T. L., Yurkshtovich N. K., Kosterova R. I., Golub N. V., Pristromova Y. I., Solomevich S. O., Bychkovsky P. M. Rheological properties and in vitro hydrolytic stability of the carboxymethylcellulose-dioxidine composition.…”

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confidence: 99%

“…Динамическую вязкость растворов Na-КМЦ и ее композиций с диоксидином определяли на ротационном вискозиметре Rheotest 2 при температуре 25±2 °С в интервале градиентов ско рости сдвига от 0,1667 до 1312 с -1 . Для определения влияния диоксидина и термообработки на гидролитическую устойчивость Na-КМЦ к ее 2 %-ному раствору и раствору композиции Na-КМЦ-диоксидин добавляли фосфатный буферный раствор с рН 7,4 при модуле 1:50 и выдерживали при температуре 37±2 °С в течение 28 сут [8,9]. Растворы пятикратно диализировали против воды для полного удаления солей, после чего лиофильно высушивали.…”

unclassified

Rheological properties and in vitro hydrolytic stability of the carboxymethylcellulose–dioxidine composition

Yurkshtovich

Yurkshtovich²,

Голуб

et al. 2022

Vescì Akademìì navuk Belarusì. Seryâ himičnyh navuk

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The composition of carboxymethylcellulose–dioxydine was obtained and its structural, morphological and rheological characteristics in the processes of heat treatment and chemical hydrolysis were studied. Using IR spectroscopy, scanning electron microscopy, and viscometry, it has been established that the introduction of dioxidine into a solution of carboxymethylcellulose sodium salt with different molecular weights leads to partial disordering of hydrogen bonds between macromolecules, promotes thermal destruction of the polysaccharide and a decrease in the dynamic viscosity of solutions. Experimental kinetic curves of carboxymethylcellulose hydrolysis in the presence and absence of dioxidine were obtained, and it was shown that they could be described using a first-order equation. The hydrolysis rate coefficients were calculated, and it was shown that, as a result of heat treatment, as well as in the presence of an active substance, the rate of carboxymethylcellulose hydrolysis increased. The change in the rheological properties of carboxymethylcellulose sodium salt solutions with different degrees of polymerization in the presence of an antimicrobial substance should be taken into account when choosing the composition of viscous prolonged forms of biologically active substances.

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Bacterial cellulose and its potential for biomedical applications

Wahid

Huang

Zhao

et al. 2021

Biotechnology Advances

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Biological Films Based on Oxidized Bacterial Сellulose: Synthesis, Structure, and Properties

Cited by 6 publications

References 22 publications

Comparative Studies of the Chemical Interaction of Guanidine With Dialdehyde Cellu-Lose and Pectin

Comparative Studies of the Chemical Interaction of Guanidine With Dialdehyde Cellu-Lose and Pectin

Rheological properties and in vitro hydrolytic stability of the carboxymethylcellulose–dioxidine composition

Bacterial cellulose and its potential for biomedical applications

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