Adyghe Int. Sci. J. Vol. 22, No 4. P. 57-66. ISSN 1726-9946
On the methodological features and errors of measuring the surface tension of aqueous suspensions
Raykom Khasimkhanovich Dadashev
Ph. Chief Scientific Associate at the Laboratory of Experimental Physics, Kh. I. Ibragimov Complex Research Institute of the Russian Academy of Sciences (21 a, st. Staropromyslovskoe sh., Grozny, Chechen Republic, Russian Federation, 366002), Full member of AIAS, ORCID: 0000-0002-0192-5510, Scopus ID 6603898428, email@example.com
Roman Sulambekovich Dzhambulatov
Candidate of Philosophy and Mathematics, Head of the Department of Physical and Mathematical Research of the Kh. I. Ibragimov, (21 a, st. Staropromyslovskoe sh., Grozny, Chechen Republic, Russian Federation, 366002) ORCID: 0000-0002-4126127X, Scopus ID 56205601800, firstname.lastname@example.org
Abstract. The paper analyzes the methodological features of measuring the surface tension of highly dispersed systems, which include bentonite suspensions. It is shown that bentonite suspensions arc complex nonequilibrium systems, when measuring the surface tension of which it is necessary to take into account the influence on its value of many factors, the main ones being dispersion and sedimentation. These factors have a significant effect on the measured value of surface tension. The non-equilibrium of the system under study leads to a time dependence of the surface tension, which significantly complicates the measurement of its dependence on temperature. To measure the surface tension of a bentonite suspension, a new method based on the superposition of measurement results obtained by two independent methods, the hanging drop method and the lying drop method, has been developed and tested. Sedimentation, when using these methods, leads to oppositely directed (relative to the surface) processes: in the first case, the surface of the drop enriches the particles of the solid phase, in the second -is impoverished. Experimental studies of the time dependences of surface tension have shown that in the hanging drop method there is a linear decrease in surface tension, in the lying drop method the surface tension increases linearly with time. Superposition of the results obtained by these methods allows us to find the value of surface tension at a given time. An analysis of surface tension measurement errors of the influence of various factors on the error in measuring surface tension of the developed method is carried out.
Keywords: surface tension, dispersed phase, dispersion medium, bentonite suspension, measurement methods, lying drop, hanging drop, sedimentation, random and systematic measurement error
Acknowledgments: the author are thankful to the anonymous reviewer for his valuable remakes.
For citation. R. H. Dadashev, R. S. Dzhambulatov On the methodological features and errors of measuring the surface tension of aqueous suspensions. Adyghe Int. Sei. J. 2022. Vol. 22, No. 4. P. 57-66.
The author has read and approved the final version of the manuscript.
Submitted 24.11.2022; approved after reviewing 22.12.2022; aeeepted for publication 26.12.2022.
© Dadashev R. H.,
Dzhambulatov R. S., 2022
1. R. Dadashev, R. Kutuev, D. Elimkhanov Analytical description of concentration dependence of surface tension in multicomponent systems. Journal of Physics: Conference Series. 2008. V. 98. No. 6. Art. 062029.
2. В. B. Alchagirov, R. H. Dadashev, F. F. Dyshekova, D. Z. Elimkhanov Surface tension of India. Methods and results of research. Teplofisika vysokikh tcmpcratur. 2014. V. 52, No. 6. P. 941-960.
3. R. Kh. Dadashev, Kh. B. Khokonov, D. Z. Elimkhanov, Z. I. Bichueva Concentration dependence of surface tension of double systems. Proceedings of the Russian Academy of Sciences. Physical Series. 2007. V. 71, No. 2. P. 264-266.
4. R. H. Dadashev, R. S. Dzhambulatov, D. Z. Elimkhanov Effect of Nanoscale Particles on the Surface Properties of Aqueous Suspensions of Bentonites. Bulletin of the Russian Academy of Sciences. Physics, 2018. V. 82, No. 7. P. 902-904.
5. K. Nanda, K. Bulk Cohesive energy and surface tension from the size-dependent evaporation study of nanoparticle. Applied Physics Letters, 2005. V. 87. P. 21-29.
6. Van Olphen H. Forces between suspended bentonite particles. Shell Development Company. Exploration and prediction research division. 2008. Huston. No. 62. P. 204-224.
7. V. D. Shantarin, V. S. Voytenko Pliysico-chcmistry of dispersed systems. Moscow: Ncdra, 1990. 315 p.
8. V. M. Vitiugin, O. A. Fuchs, T. N. Somova Study of influence of bentonite suspensions concentration on surface tension and rheological properties. Proceedings of Tomsk Polytechnic Institute named after S. M. Kirov. 1977. V. 214. P. 106-108.
9. R. Kh. Dadashev, R. S. Dzhambulatov, Z. I. Dadasheva, H. S. Talhigova The influence of some factors on the surface tension isotherms of aqueous suspensions of bentonite // Proceedings of the Kabardino-Balkarian University. 2019. V. 9, No. 2. P. 48-52.
10. R. S. Dzhambulatov, R. Kh. Dadashev, D. Z. Elimkhanov Theoretical models for the prediction of the surface tension of dioxane 1.4-acctonc-water solutions. Bulletin of the Academy of Sciences of the Chechen Republic. 2015. No. 1(26). P. 5-8.
11. R. Kh. Dadashev, R. S. Dzhambulatov, D. Z. Elimkhanov The influence of spatial structures on the surface properties of bentonite suspensions. Bulletin of the Academy of Sciences of the Chechen Republic. No. 2 (49). 2020. P. 21-24.
12. A. I. Rusanov, V. A. Prokhorov Inter-phase tensometry. SPb: Chemistry, 1994. 397 p.
13. N. N. Kochurova, A. I. Rusanov, N. O. Myrzakhmetova The Joncs-Rcay effect and surface electrification. Journal of the Reports of the Academy of Sciences of the USSR. 1991. V. 316, No. 6. P. 1425-1427.
14. R. KH. Dadashev, R. S. Dzhambulatov, D. Z. Elimkhanov Features of the concentration dependence of the surface tension of aqueous suspensions of bentonite. Journal of Physical Chemistry. 2015. V. 89, No. 8. P. 1338-1340.
15. R. Kh. Dadashev, R. S. Dzhambulatov, D. Z. Elimkhanov Measurement of surface tension by the method of a hanging drop on tensiometer DSA-100. Proceedings of KNII RAS, Grozny, 2012. No. 5. P. 3-7.
16. A. N. Alentjev, A. G. Ilchenko, A. Y. Tokov Statistical methods of processing the results of physical experiment: tutorial. Ivanovo: 2007. 143 p.
This work is licensed under a Creative Commons Attribution 4.0 License.