The Influence of Bicomponent Mixed Surfactants on Drop/Interface Coalescence

Document Type : Research Article

Authors

Department of Chemical Engineering, Faculty of Engineering, Tehran University, P.O.Box. 11365-4563, Tehran, I.R. IRAN

Abstract

Effects of binary mixtures of ionic/nonionic (sodium dodecyl sulfate/2-heptanol or 1-decanol) and nonionic/nonionic surfactants (2-heptnol/1-decanol) on drop/interface coalescence of water drops in a continuous n-heptane phase were examined. The drop size reduced appreciably and the multi-step coalescence was suppressed finally as the concentration of each of the constituting components of surfactant mixture was increased. The drop became more stable in comparison to single surfactant systems. It was concluded that the mixed surfactants were much more effective on coalescence time and drop lifetime than single surfactant, particularly when one of the components was soluble in the drop phase.

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References

[1] Blawzdziewicz, J., Cristini, V. and Loewenberg, M., Near-Contact Motion of Surfactant-Covered Spherical Drops: Ionic Surfactant, J. Colloid Interf. Sci., 211, 355 (1999).
[2] Yeo, L.Y., Matar, O.K., Susana Perez de Ortiz, E. and Hewitt, G.F., Film Drainage between Two Surfactant- Coated Drops Colliding at Constant Approach Velocity, J. Colloid Interf. Sci., 257, 93 (2003).
[3] Myers, D., “Surfactant  Science  and Technology”; VCH Publishers, New York, NY (1988).
[4] Couper, A., Thermodynamics of Surfactant Solution, Tadros, T.F., Ed., in “Surfactants”, Academic Press, London (1984).
[5] Guzun-Stoica, A., Kurzeluk, M. and Floarea, Q., Experimental Study of Marangoni Effect in a Liquid/Liquid System, Chem. Eng. Sci., 55, 3813 (2000).
[6] Laughlin, R.G., “The Aqueous Phase Behavior of Surfactant”, Academic Press, London, UK (1994).
[7] Chesters, A.K. and Bazhlekov, I.B., Effect of Insoluble Surfactants on Drainage and Rupture of a Film between Drops Interacting under a Constant Force, J. Colloid Interf. Sci., 230, 229 (2000).
[8] Gharibi, H., Hashemianzadeh, S.M. and Razavi-zadeh, B.M., Determination of Interaction Parameters of Mixed Surfactant System Using a Monte Carlo Simulation Technique, Colloids Surf. A: Phys. Eng. Aspects, 196, 31 (2002).
[9] Nikolov, A.D. and Wasan, D.T., Effects of Surfactant on Multiple Stepwise Coalescence of Single Drops at Liquid/Liquid Interfaces, Ind. Eng. Chem. Res., 34, 3653 (1995).
[10] Gao, H.-C., Zhao, S., Mao, S.-Z.,Yuan, H.-Z., Yu, J.-Y., Shen, L.F. and Du, Y.-R., Mixed Micelles of Polyethylene Glycol(23) Lauryl Ether with Ionic Surfactant Studied by Proton 1D and 2D NMR, J. Colloid Interf. Sci., 249, 200 (2002).
[11] Abe, M. and Ogino, K., Solution Properties of Anionic/Nonionic “Mixed Surfactant Systems, Ogino, K. and Abe, M., Eds., in Mixed Surfactant System”, Marcel Dekker, New York, NY (1992).
[12] Urbina-Villalba, G. and Sucre, M.G., Influence of Surfactant Distribution on the Stability of Oil/Water Emulsions toward Flocculation and Coalescence, Colloids Surf. A: Phys. Eng. Aspects, 190, 111 (2001).
[13] Liu, D., Ma, J., Chang, H. and Zhao, Z., Investigation on the Conductivity and Microstructure of AOT/Nonionic Surfactant/Water/n-Heptane Mixed Reverse Micelles, Colloids Surf. A: Phys. Eng. Aspects, 135, 157 (1998).
[14] Panda, A. K. and  Chakraborty, A. K.,  Interaction of Mixed Surfactants with Bacterial Lipopoly-saccharide, J. Colloid Interf. Sci., 203, 260 (1998).
[15] Goloub, T.P., Pugh, R.J. and Zhmud, B.V., Micellar Interactions in Nonionic/Ionic Mixed Surfactant Systems, J. Colloid Interf. Sci., 229, 72 (2000).
[16] Narsimhan, G. and Goel, P., Drop Coalescence during Emulsion Formation in a High Pressure Homogenizer for Tetradecane/in/Water Emulsion Stabilized by Sodium Dodecyl Sulfate, J. Colloid Interf. Sci., 238, 420 (2001).
[17] Chanamai, R. and McClements, D.J., Creaming Stability of Flocculated Monodisperse Oil/in/Water Emulsions, J. Colloid Interf. Sci., 225, 214 (2000).
[18] Dickinson, E. and Ritzoulis, C., Creaming and Rheology of Oil/in/Water Emulsions Containing Sodium Dodecyl Sulfate and Sodium Caseinate, J. Colloid Interf. Sci., 224, 148 (2000).
[19] Verma, S. and Kumar, V.V., Relationship between Oil/Water Interfacial Tension and Oily Soil Removal in Mixed Surfactant Systems, J. Colloid Interf. Sci., 207, 1 (1998).
[20] Kabin, J.A., Tolstedt, S.L., Sáez, A.E., Grant, C.S. and Carbonell, G., Removal of Organic Films from Rotating Disks Using Aqueous Solutions of Nonionic Surfactants: Effect of Surfactant Molecular Structure, J. Colloid Interf. Sci., 206, 102 (1998).
[21] Jeffreys, G.V. and Davies, G.A., Coalescence of Liquid Droplets and Liquid Dispersions, Hanson, C., Ed., in “Recent advances in Liquid/Liquid Extraction”, Pergamon Press (1971).
[22] Khadiv-Parsi, P., Suggestion and Analysis of New Correlations in the Drop-Interface Coalescence and the Droplet Dispersion Bed Phenomena, Ph.D. Thesis, Faculty of Engineering, University of Tehran, Iran (2001).
[23] Khadiv-Parsi,P., Moosavian, M.-A. and Bahmanyar, H., The Influence of Surfactants on Drop/Interface Coalescence Phenomena, Sixth National Iranian Chem. Eng. Congress, Isfahan University of Technology (May 2001).
[24] Khadiv-Parsi, P. and Moosavian,M.-A., Suggestion of New Correlations for Drop/Interface Coalescence Phenomena in the Absence and Presence of Single Surfactant, Iran. J. Chem. & Chem. Eng., 23, 79 (2004).
[25] Skelland, A.H.P. and Minhas, S.S., Dispersed Phase Mass Transfer during Drop Formation and Coalescence in Liquid-Liquid Extraction, AICHE J., 17, 1316 (1971).
[26] Ciach, A., Babin, V. and Tasinkerych, M., Effects of Confinement on Self-Assembling Systems, Colloids Surf. A: Phys. Eng. Aspects, 28, 51 (2001).
[27] Shelley, J.C. and Shelley, M.Y., Computer Simulation of Surfactant Solutions, Current Opinion in Colloid Interf. Sci., 5, 101 (2000).
[28] Vaughan, C.D., Stability of Emulsions, Schick, M.J. and Fowkes, F.M., Eds., in “Surfactants in Cosmetics”, Marcel Dekker, New York, NY (1997). 

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