PMID: 11308852Apr 20, 2001Paper

Realistic calculation of the low- and high-density liquid phase separation in a charged colloidal dispersion

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
S K LaiG F Wang

Abstract

A realistic statistical-mechanics model is applied to describe the repulsive interaction between charged colloids. The latter, in combination with the long-range van der Waals attraction simulated under excess salt environment, gives rise to a total intercolloidal particle potential showing a clear second potential minimum. Differing from the usual Derjaguin-Landau-Verwey-Overbeek (DLVO) model, the present model is valid at any finite concentration of colloids and is thus an appropriate model for investigating the low- and high-density liquid phase transition. Employing this two-body colloid-colloid potential and in conjunction with the Weeks-Chandler-Andersen [J. D. Weeks, D. Chandler, and H. C. Andersen, J. Chem. Phys. 54, 5237 (1971)] thermodynamic perturbation theory, we derive analytical expressions for the pressure, chemical potential, and related thermodynamic functions. These thermodynamic quantities were used to calculate the phase diagrams of charged colloidal dispersions in terms of the critical parameters: temperature, volume fraction, and electrolyte concentration parameter k(D). Compared with the DLVO model, we find the areas enclosed within the spinodal decomposition and also the liquid-liquid coexistence curves ...Continue Reading

References

Apr 4, 1994·Physical Review Letters·P Bolhuis, D Frenkel
Aug 1, 1994·Physical Review Letters·C F TejeroM Baus
Nov 23, 2000·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·A R Denton

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Citations

Feb 2, 2010·The Journal of Chemical Physics·S K Lai, Xuhui Xiao
Jan 26, 2010·The Journal of Chemical Physics·Trinh Hoa LangS K Lai
Dec 17, 2008·Advances in Colloid and Interface Science·Nina KovalchukNidal Hilal
Mar 3, 2005·The Journal of Chemical Physics·Yun LiuSow-Hsin Chen
Oct 7, 2014·Physical Chemistry Chemical Physics : PCCP·Junko Habasaki, Masamichi Ishikawa
Dec 17, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·G F Wang, S K Lai
Nov 22, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·S K Lai, K L Wu
May 19, 2009·Chemical Reviews·Shiqi Zhou, J R Solana
Feb 3, 2007·The Journal of Physical Chemistry. B·María CortadaJ A Molina-Bolívar

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