Acid-base properties of fibrous polyampholytes with aminodiacetic functional groups
https://doi.org/10.29235/1561-8323-2020-64-3-300-307
Abstract
Polyampholytes, containing aminodiacetic functional groups, on the base of polyacrylonitrile fiber Nitron C were obtained by the amination reaction of nitrile groups with polyamines (number of repeating units from 1 to 5) and subsequent alkylation with monochloroacetic acid. The experimental results of potentiometric titration and sorption of supporting electrolyte (kCl) ions by synthesized ion exchangers were obtained, which made it possible to determine the acidity parameters of functional groups: the presence of four types of cation exchange and two types of anion exchange groups was detected in polyampholytes, the sequence of their neutralization in the titration process was established.
About the Authors
E. G. Kosandrovich
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Kasandrovich Evgenii G. – Ph. D. (Chemistry), Associate Professor, Head of the Laboratory
13, Surganov Str., 220072, Minsk
P. V. Nesteronok
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Nesteronok Petr V. - Ph. D. (Chemistry), Senior researcher
13, Surganov Str., 220072, Minsk
L. N. Shachenkova
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Shachenkova Larisa N. - Ph. D. (Chemistry), Senior researcher
13, Surganov Str., 220072, Minsk
V. S. Soldatov
Institute of Physical Organic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Soldatov Vladimir S. - Academician, D. Sc. (Chemistry), Professor, Chief researcher
13, Surganov Str., 220072, Minsk
References
1. Orlovskaya L. A., kremko L. M., kasiul S. V. Reliability of the method of sorption concentration of heavy metal ions on the sorbent FIBAN X-1. Zdorov’e i okruzhayushchaya sreda = Health and Environment, 2008, no. 11, pp. 184–188 (in Russian).
2. Kudaibergenov S., Jaeger W., Laschewsky A. Polymeric betaines: synthesis, characterization, and application. Advances in Polymer Science, 2006, vol. 201, pp. 157–224. https://doi.org/10.1007/12_078
3. Nesteronok P. V., Soldatov V. S. Acid-base properties of ion exchangers: V. Synthesis and properties of ion exchangers on the base of modacrylic polyacrylonitrile–vinylchloride fibers. Reactive and Functional Polymers, 2011, vol. 71, no. 10, pp. 1033–1039. https://doi.org/10.1016/j.reactfunctpolym.2011.07.007
4. Nesteronok P. V., Soldatov V. S. Protolytic properties of aminocarboxylic polyampholytes based of modacryl polymeric matrix. Vestsi Natsyyanal’nai akademii navuk Belarusi. Seryya khimichnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Chemical series, 2014, no. 4, pp. 72–79 (in Russian).
5. Harju L., krook T. Determination of equilibrium constants of alkaline earth metal ion chelates with Dowex A-1 chelating resin. Talanta, 1995, vol. 42, no. 3, pp. 431–436. https://doi.org/10.1016/0039-9140(95)01428-e
6. Biesuz R., Pesavento M., Gonzalo A., Valiente M. Sorption of proton and heavy metal ions on a macroporous chelating resin with an iminodiacetate active group as a function of temperature. Talanta, 1998, vol. 47, no. 1, pp. 127–136. https://doi.org/10.1016/s0039-9140(98)00060-5
7. Nesteronok P. V., Soldatov V. S. A method for determination of polyampholytes’ acidity parameters. Vestsi Natsyyanal’nai akademii navuk Belarusi. Seryya khimichnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Chemical series, 2013, no. 2, pp. 31–36 (in Russian).
8. Nesteronok P. V., kosandrovich E. G., Shachenkova L. N., korshunova T. A. Catalytic method for synthesis of polyampholytes from (poly)acrylonitrile fiber. Vestsi Natsyyanal’nai akademii navuk Belarusi. Seryya khimichnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Chemical series, 2014, no. 4, pp. 80–87 (in Russian).
9. Babko A. k., Piatnitskiy I. V. Quantitative analysis. Moscow, 1956. 736 p. (in Russian).
10. Soldatov V. S. Potentiometric titration of ion exchangers. Reactive and Functional Polymers, 1998, vol. 38, no. 2–3, pp. 73–112. https://doi.org/10.1016/s1381-5148(98)00018-2
11. Soldatov V. S. Mathematical modeling of ion exchange equilibria on resinous ion exchangers. Reactive Polymers, 1993, vol. 19, no. 1–2, pp. 105–121. https://doi.org/10.1016/0923-1137(93)90016-9
12. Soldatov V. S. A simple method for the determination of the acidity parameters of ion exchangers. Reactive and Functional Polymers, 2000, vol. 46, no. 1, pp. 55–58. https://doi.org/10.1016/s1381-5148(00)00041-9
13. Polyampholytes. Model of potentiometric titration and calculation of acidity parameters. Available at: http://copoka.by/nester/ (accessed 3 April 2020).
14. Szabadka Ö. Studies on chelating resins – II Determination of the protonation constants of a chelating resin containing iminodiacetic acid groups. Talanta, 1982, vol. 29, no. 3, pp. 183–187. https://doi.org/10.1016/0039-9140(82)80092-1
Review
Views: 723
Email this article 