Abstract
The kinetics of dewetting (a decrease in contact angles and wetted surface area) during the evaporation of drops of cetyltrimethylammonium bromide (CTAB) solutions from paraffin and Teflon surfaces was studied in a wide concentration range. Three different stages of this process were found: (1) a monotonic decrease in the contact angle at a “fixed” position of the three-phase contact line, (2) contraction of the wetted surface area (the drop base) at a constant contact angle, and (3) simultaneous contraction of the drop base and a decrease in the contact angle. The CTAB distribution over a solid surface after the drop evaporation was studied by autoradiography. Depending on the surfactant concentration and the nature of a hydrophobic substrate, dewetting occurs by two mechanisms: slipping and “carpet rolling.”
Similar content being viewed by others
REFERENCES
Wolfram, E. and Faust, R., Wetting, Spreading and Adhesion, London: Academic, 1978, p. 213.
Extrand, C.W. and Kumagai, Y., J. Colloid Interface Sci., 1995, vol. 170, no. 2, p. 515.
Nadkarni, G.D. and Garoff, S., Langmuir, 1994, vol. 10, no. 5, p. 1618.
Sedev, R. and Petrov, I., God. Sofii. Univ., Khim. Fak., 1992, vol. 84, p. 8.
Sedev, R.V. and Petrov, J.G., Colloids Surfaces, 1992, vol. 62, nos. 1-2, p. 141.
Petrov, P.G. and Petrov, J.G., Dokl. Bulg. Akad. Nauk, 1992, vol. 45, no. 12, p. 77.
Hayes, R.A. and Ralston, J., J. Colloid Interface Sci., 1993, vol. 159, no. 12, p. 429.
Brzoska, J.B., Brochard-Wyart, F., and Rondelez, F., Langmuir, 1993, vol. 9, no. 8, p. 2220.
Sharma, A. and Reiter, G., J. Colloid Interface Sci., 1996, vol. 178, no. 2, p. 383.
Woodward, J.T. and Schwartz, D.K., Langmuir, 1997, vol. 13, no. 26, p. 6873.
Newcombe, G. and Ralston, J., Langmuir, 1992, vol. 8, no. 1, p. 190.
Lin, S.-Y., Chang, H.-C., Lin, L.-W., and Huang, P.-Y., Rev. Sci. Instrum., 1996, vol. 67, no. 8, p. 2852.
Adachi, E., Dimitrov, A.S., and Nagayama, K., Langmuir, 1995, vol. 11, no. 4, p. 1057.
Bourges, C. and Shanahan, M.E.R., C. R. Acad. Sci., Ser. II: Mec., Phys., Chim., Astron., 1993, vol. 316, no. 3, p. 311.
Krekhova, M.G. and Dolzhikova, V.D., in Voprosy fiziki formoobrazovaniya i fazovykh prevrashchenii (Problems in Physics of Shaping and Phase Transitions), Kalinin: Kalininskii Gos. Univ., 1989, p. 66.
Soboleva, O.A., Korobkov, V.I., Summ, B.D., et al., Kolloidn. Zh., 1998, vol. 60, no. 6, p. 826.
Abramzon, A.A., Poverkhnostno-aktivnye veshchestva (Surfactants), Leningrad: Khimiya, 1981.
Geguzin, Ya.E., Kaplya (Drop), Moscow: Nauka, 1977.
Entsiklopediya polimerov (Polymer Encyclopedia), Kabanov, V.A., Ed., Moscow: Sov. Entsiklopediya, 1977, vol. 3, p. 1002.
Krekhova, M.G., Cand. Sci. (Chem.) Dissertation, Moscow: Moscow State University, 1989.
Dussan, V.E. and Davis, S., J. Fluid Mech., 1974, vol. 65, no. 1, p. 71.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Soboleva, O.A., Summ, B.D. The Kinetics of Dewetting of Hydrophobic Surfaces during the Evaporation of Surfactant Solution Drops. Colloid Journal 65, 89–93 (2003). https://doi.org/10.1023/A:1022379210765
Issue Date:
DOI: https://doi.org/10.1023/A:1022379210765