MODELING OF THE SURFACE TENSION OF COLLOIDAL SUSPENSIONS

Roghayeh Hadidimasouleh (), Maziar Sahba Yaghmaee, Reza Riahifar and Babak Raissi
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Roghayeh Hadidimasouleh: Electro-Ceramic Group, Ceramic Department, Materials and Energy Research Center, P. O. Box 14155-4777, Tehran, Iran
Maziar Sahba Yaghmaee: Electro-Ceramic Group, Ceramic Department, Materials and Energy Research Center, P. O. Box 14155-4777, Tehran, Iran
Reza Riahifar: Electro-Ceramic Group, Ceramic Department, Materials and Energy Research Center, P. O. Box 14155-4777, Tehran, Iran
Babak Raissi: Electro-Ceramic Group, Ceramic Department, Materials and Energy Research Center, P. O. Box 14155-4777, Tehran, Iran

Surface Review and Letters (SRL), 2017, vol. 24, issue 04, 1-9

Abstract: Surface tension is one of the fundamental properties of the colloids, which can be altered by concentration and size of colloidal particles. In the current work, modeling of the surface tension of suspension as it would be analyzed by maximum bubble pressure method has been performed. A new modified equation to correlate the surface tension with the bubble pressure is derived by applying fundamental thermodynamic relation considering the presence of particles in suspension and curvature of the interface between the particles and bubbles inside liquid. Moreover, the change of particles concentration in air–water interface due to capillary force is also considered. The predicted surface tension using the developed model has been verified by numerous experimental data with deviation less than 5% in most of cases. It was found that the calculated surface tension is altered by contact angle and particle radius as well as particle concentration. The obtained model may have potential application to predict the surface tension of colloidal suspension.

Keywords: Laplace pressure; colloid; contact angle; surface tension (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17500500

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