Kinetics research of the process of phosphorylation of regenerated cellulose in the system phosphoric acid – tributyl phosphate – phosphorus oxide(V)

  • Nikolai K. Yurkshtovich Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk
  • Natalia V. Golub Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk
  • Tatyana L. Yurkshtovich Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk
  • Violetta O. Mironchik Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk
  • Valentina A. Alinovskaya Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk
  • Fedor N. Kaputsky Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

Abstract

The regularities of the esterification reaction of cellulose in the system of phosphoric acid – tributyl phosphate – phosphorus oxide(V) with various ratios of reagents, reaction temperature and time were investigated. The quantitative assessment of the kinetic process was presented with the help of the polychronal kinetics equation. Based on the results of the equation, activation energy values, it was concluded that the rate-limiting step of the process is diffusion. Esterification of cellulose takes place in a heterogeneous environment and the rate of diffusion of agent to the cellulose fiber structure depends not only on the temperature and composition of the reaction mixture, but also on the structural features of the modified material, determining the availability of hydroxyl groups to esterification. Conditions for obtaining cellulose phosphate in the form of a hydrogel containing phosphate groups of up to11,2 % were optimized.

Author Biographies

Nikolai K. Yurkshtovich, Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

PhD (chemistry); leading researcher at the laboratory of structural and chemical modification of polysaccharides and drugs based on them

Natalia V. Golub, Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

PhD (chemistry); senior researcher at the laboratory of structural and chemical modification of polysaccharides and drugs based on them

Tatyana L. Yurkshtovich, Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

PhD (chemistry); head of the laboratory of structural and chemical modification of polysaccharides and drugs based on them

Violetta O. Mironchik, Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

junior researcher at the laboratory of structural and chemical modification of polysaccharides and drugs based on them

Valentina A. Alinovskaya, Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

researcher at the laboratory of structural and chemical modification of polysaccharides and drugs based on them

Fedor N. Kaputsky, Research Institute for Physical Chemical problems of the Belarusian State University, Leningradskaya street, 14, 220006, Minsk

academician of the National Academy of Sciences; doctor of science (chemistry); principal researcher at the laboratory of structural and chemical modification of polysaccharides and drugs based on them

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Published
2017-11-29
Keywords: cellulose, biopolymer, hydrogel, chemical modification, esterification, phosphorylation mixture, Yerofeyev – Kolmogorov’s equation
How to Cite
Yurkshtovich, N. K., Golub, N. V., Yurkshtovich, T. L., Mironchik, V. O., Alinovskaya, V. A., & Kaputsky, F. N. (2017). Kinetics research of the process of phosphorylation of regenerated cellulose in the system phosphoric acid – tributyl phosphate – phosphorus oxide(V). Journal of the Belarusian State University. Chemistry, 1, 16-24. Retrieved from https://journals.bsu.by/index.php/chemistry/article/view/1153
Issue
No 1 (2017): Journal of the Belarusian State University. Chemistry
Section
Original Articles

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