Depletion Potential Between Two Colloid Particles in an Associating Fluid: a Density Functional Theory Study

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (7): 1567.

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Depletion Potential Between Two Colloid Particles in an Associating Fluid: a Density Functional Theory Study

GU Fang¹, WANG Hai-Jun^1,2,3*

1. College of Chemistry and Environmental Science,
2. Key Laboratory of Medical Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding 071002, China;
3. International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China

Received:2011-01-14 Revised:2011-04-09 Online:2011-07-10 Published:2011-06-02
Contact: WANG Hai-Jun E-mail:whj@mail.hbu.cn
Supported by:
国家自然科学基金(批准号: 20873035)资助.

Abstract

Abstract: The depletion potential between two colloid particles immersed in an associating fluid is investigated by the classical density functional theory for depletion potential proposed by Roth, Evans and Dietrich. An attempt is made to obtain the effects of several factors concerning colloid particles and solvent molecules on the depletion potential, which are the bulk density of solvent, size ratio of colloid particle to solvent, functionality of solvent and its associated energy, and the interaction between colloid particle and solvent. With the depletion potential under various conditions being presented, it is shown that the effects of these factors on the depletion potential are significant, and this can provide some useful clues on regulating the interaction between colloid particles in the related experiments.

Key words: Depletion potential, Density functional theory, Colloid particle, Associating fluid

CLC Number:

O641

TrendMD:

GU Fang, WANG Hai-Jun*. Depletion Potential Between Two Colloid Particles in an Associating Fluid: a Density Functional Theory Study[J]. Chem. J. Chinese Universities, 2011, 32(7): 1567.

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Depletion Potential Between Two Colloid Particles in an Associating Fluid: a Density Functional Theory Study

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