### Abstract

We have examined numerically and analytically the validity of the usual assumptions implicit in the calculation of stability ratios of colloidal particles within the scope of DLVO theory for the description of aggregation phenomena. We found that the usual criterion, that requires the distance between the surfaces of the particles to be much smaller than the particle size is not sufficient to guarantee the appropriate behaviour of the integral that defines the stability ratio. The importance of additional constraints is of particular importance in the slow aggregation regime. We present a detailed study of the set of parameters that must be used in the DLVO potential such that the approximate expression for the stability ratio can be determined with an error smaller than 5% compared to the exact solution.

Original language | English |
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Pages (from-to) | 165-170 |

Number of pages | 6 |

Journal | Journal of Molecular Structure: THEOCHEM |

Volume | 769 |

Issue number | 1-3 |

DOIs | |

Publication status | Published - Sep 14 2006 |

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### Keywords

- Colloidal dispersion
- Critical coagulation concentration
- Stability ratio

### ASJC Scopus subject areas

- Physical and Theoretical Chemistry
- Computational Theory and Mathematics
- Atomic and Molecular Physics, and Optics

### Cite this

*Journal of Molecular Structure: THEOCHEM*,

*769*(1-3), 165-170. https://doi.org/10.1016/j.theochem.2006.04.029

**A computational study of the stability ratios of spherical coloidal particles.** / Guaregua M., J. A.; Squitieri, E.; Mujica, Vladimiro.

Research output: Contribution to journal › Article

*Journal of Molecular Structure: THEOCHEM*, vol. 769, no. 1-3, pp. 165-170. https://doi.org/10.1016/j.theochem.2006.04.029

}

TY - JOUR

T1 - A computational study of the stability ratios of spherical coloidal particles

AU - Guaregua M., J. A.

AU - Squitieri, E.

AU - Mujica, Vladimiro

PY - 2006/9/14

Y1 - 2006/9/14

N2 - We have examined numerically and analytically the validity of the usual assumptions implicit in the calculation of stability ratios of colloidal particles within the scope of DLVO theory for the description of aggregation phenomena. We found that the usual criterion, that requires the distance between the surfaces of the particles to be much smaller than the particle size is not sufficient to guarantee the appropriate behaviour of the integral that defines the stability ratio. The importance of additional constraints is of particular importance in the slow aggregation regime. We present a detailed study of the set of parameters that must be used in the DLVO potential such that the approximate expression for the stability ratio can be determined with an error smaller than 5% compared to the exact solution.

AB - We have examined numerically and analytically the validity of the usual assumptions implicit in the calculation of stability ratios of colloidal particles within the scope of DLVO theory for the description of aggregation phenomena. We found that the usual criterion, that requires the distance between the surfaces of the particles to be much smaller than the particle size is not sufficient to guarantee the appropriate behaviour of the integral that defines the stability ratio. The importance of additional constraints is of particular importance in the slow aggregation regime. We present a detailed study of the set of parameters that must be used in the DLVO potential such that the approximate expression for the stability ratio can be determined with an error smaller than 5% compared to the exact solution.

KW - Colloidal dispersion

KW - Critical coagulation concentration

KW - Stability ratio

UR - http://www.scopus.com/inward/record.url?scp=33748608265&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748608265&partnerID=8YFLogxK

U2 - 10.1016/j.theochem.2006.04.029

DO - 10.1016/j.theochem.2006.04.029

M3 - Article

VL - 769

SP - 165

EP - 170

JO - Computational and Theoretical Chemistry

JF - Computational and Theoretical Chemistry

SN - 2210-271X

IS - 1-3

ER -