The study of aggregate stability of monodisperse silica sol in NaCl solutions

  • E. Golikova Saint Petersburg State Technological University of Plant Polymers (SPb STUPP) , St. Petersburg
  • N. Novikova Saint Petersburg State Technological University of Plant Polymers (SPb STUPP) , St. Petersburg
  • Yu. Chernoberezhskii Saint Petersburg State University, St. Petersburg
Keywords: kinetics of aggregation, reversible aggregation, flow ultramicroscopy, monodisperse silica sol

Abstract

By flow ultramicroscopy method the kinetics of aggregation of monodisperse silica sol (with a size 250 nanometers) in aqueous solutions NaCl at pH 6.2, 9.0 and 10.2 has been investigated. It was established that slow coagulation of sol SiO2 proceeds on barrierless mechanism in the distant potential minimum resulting from predominance of structural forces of repulsion on dispersion forces of an attraction.

References

1. Дерягин Б.В., Ландау Л.Д. Теория устойчивости сильно заряженных лиофобных золей и слипания сильно заряженных частиц в растворах электролитов // ЖЭТФ – 1941. – Т.11, № 2 – С. 802–821. 2. Дерягин Б.В. Теория устойчивости коллоидов и тонких пленок. М.: Наука, 1986 – 206 с. 3. Дерягин Б.В., Чураев Н.В., Муллер В.М. Поверхностные силы. М.: Наука, 1985 – 400 с. 4. Derjaguin B.V., Сhuraev N.V. Inclusion of structural forces in the theory of stability of colloids and films // J. Colloid Interface Sci. – 1985 - Vol.103 –№ 2 – P.542–553. 5. Oshima H. J., Healy T.W., White L.R. Improvment on Hogg-Healy-Fuerstenau formulars for the interaction on dissimilar double layers // Colloid. Interface Sci. 1982 –Vol. 9, № 2 – P.484–493. 6. Casimir H., Polder D. The influence of retardation of the London-van-der-Waals // Phys. Rev. – 1948 –Vol.73 – № 4 –P.360. 7. Schenkel J.H., and Kitchener J.A. A test of the Derjaguin- Vervey-Overbeek theory with a colloid suspensions // J.Chem. Soc. Faraday Trans. – 1960 – Vol.56, № 1 – P.161–163. 8. Чураев Н.В. Поверхностные силы и физикохимия поверхностных явлений // Успехи химии – 2004 – Т. 73, В. 1 – С. 26–38
Published
2012-09-25
How to Cite
Golikova, E., Novikova, N., & Chernoberezhskii, Y. (2012). The study of aggregate stability of monodisperse silica sol in NaCl solutions. Chemical Bulletin of Kazakh National University, 67(3), 112-117. https://doi.org/https://doi.org/10.15328/chemb_2012_3112-117