Surface Tension and Foam Stability Prediction of Polydimethylsiloxane-Polyol Systems


The Gibbs elasticity modulus represents an important tool to predict the foamability for transient and permanent foams like polyurethane flexible systems. Elasticity is related to foamability and so is used as a synonymous for the purpose of this paper. In this article we propose a method and a thermodynamic model to analyze the espumability of silicone surfactants in polyol binary mixtures using surface tension data. The present work describes foamability through the Gibbs elasticity modulus expressed in terms of first and second derivatives of surface pressure vs bulk composition. Furthermore, the Gibbs adsorption equation and the corresponding novel surface equation of state based on a modification of the Langmuir isotherm resulted in an elasticity equation with analytical solution. It is shown that according to foam model systems of surfactant solution in polyol used at commercial processes, optimum concentration level of surfactant obtained at this article by Gibbs adsorption equation and maximus on elasticity modulus finally match.

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O. Arciniega Saavedra and J. Gracia Fadrique, "Surface Tension and Foam Stability Prediction of Polydimethylsiloxane-Polyol Systems," Open Journal of Physical Chemistry, Vol. 2 No. 4, 2012, pp. 189-194. doi: 10.4236/ojpc.2012.24026.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] R. Herrington and K. Hock, “Flexible Polyurethane Foams,” 2nd Edition, Dow Chemical Co., Midland, 1997.
[2] A. W. Adamson, “Physical Chemistry at Interfaces,” 6th Edition, John Wiley & Sons Inc., United States of America, 1997.
[3] M. J. Rosen, “Surfactants and Interfacial Phenomena,” 2nd Edition, Wiley Interscience, New York, 1989.
[4] G. Biesmans, L. Colman and R. Vandensande, “The Use of Principal Component. Analysis to Classify PDMS Surfactants Used to Make Rigid Polyurethane Foams Based on Their Dynamic Surface Tension Characteristics,” Journal of Colloid and Interface Science, Vol. 199, No. 2, 1998, pp. 140-150. doi:10.1006/jcis.1997.5337
[5] X. D. Zhang, C. W. Macosko, H. T. Davis, A. D. Nikolov and D. T. Wasan, “Role of Silicone in Flexible Polyurethane Foam,” Journal of Colloid and Interface Science, Vol. 215, No. 2, 1999, pp. 270-279. doi:10.1006/jcis.1999.6233
[6] B. D. Kaushiva, S. R. McCartney, G. R. Rossmy and G. L. Wilkes, “Surfactant Level Influences on Structure and Properties of Flexible Slabstock Polyurethane Foams,” Polymer, Vol. 41, No. 1, 2000, pp. 285-310. doi:10.1016/S0032-3861(99)00135-4
[7] J. Eastoe, J. Dalton, G. Rogueda, E. Crooks, A. Pitt and E. Simister, “Dynamic Surface Tension of Nonionic Surfactant Solutions,” Journal of Colloid and Interface Science, Vol. 188, No. 2, 1997, pp. 423-430. doi:10.1006/jcis.1997.4778
[8] P. Joos, J. P. Fang and G. Serrien, “Comments on Some Dynamic Tension Measurements by the Dynamic Bubble Pressure Method,” Journal of Colloid and Interface Science, Vol. 151, No. 1, 1992, pp. 144-149. doi:10.1016/0021-9797(92)90245-H
[9] J. Eastoe and J. S. Dalton, “Dynamic Surface Tension and Adsorption Mechanisms of Surfactants at the Air-Water Interface,” Advances in Colloid and Interface Science, Vol. 85, No. 2-3, 2000, pp. 103-144. doi:10.1016/S0001-8686(99)00017-2
[10] J. Viades-Trejo and J. Gracia, “A New Surface Equation of State Hydrophobic-Hydrophilic Contributions to the Activity Coefficient,” Fluid Phase Equilibria, Vol. 264, No. 1-2, 2008, pp. 12-17.
[11] J. Viades-Trejo, A. Amigo and J. Gracia, “Activity Coefficients at Infinite Dilution for Surfactants,” Fluid Phase Equilibria, Vol. 250, No. 1-2, 2006, pp. 158-164. doi:10.1016/j.fluid.2006.10.015
[12] A. Pineiro, P. Brocos, J. Gracia and A. Amigo, “Application of the Extended Langmuir Model to Surface Tension Data of Binary Liquid Mixtures,” Fluid Phase Equilibria, Vol. 237, No. 1-2, 2005, pp. 140-151. doi:10.1016/j.fluid.2005.08.020
[13] E. O. Magana, “Identificación de Fuerzas Intermoleculares en la Interfase Mediante Ecuaciones de Langmuir,” Tesis de Licenciatura, U.N.A.M., 2008.
[14] J. Gracia, “Langmuir-BET Surface Equation of State in Fluid-Fluid Interfaces,” Langmuir, Vol. 15, No. 9, 1999, pp. 3279-3282. doi:10.1021/la981244o
[15] J. G. Fadrique, “Cinética de Adsorción Superficial,” Tesis de Maestría, U.N.A.M., 1979.
[16] G. Bleys and P. Joos, “Adsorption Kinetics of Bolaform Surfactants at the Air/Water Interface,” Journal of Physical Chemistry, Vol. 89, No. 6, 1985, pp. 1027-1032. doi:10.1021/j100252a028
[17] F. Elizalde, J. Gracia and M. Costas, “Effect of Aggregates in Bulk and Surface Properties. Surface Tension, Foam Stability and Heat Capacities for 2 Butoxyethanol + Water.” Journal of Physical Chemistry, Vol. 92, No. 12, 1988, pp. 3565-3568. doi:10.1021/j100323a048

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