Influence of nonwetting on the aggregation dynamics of micronic solid particles in a turbulent medium

Abstract : The aim of this work was to determine and to interpret the influence of nonwetting on the aggregation dynamics of micronic solid particles in a turbulent medium. Two silica granular samples were studied: one was naturally hydrophilic; the other was made hydrophobic. Aggregation in an aqueous ethanol solution was followed by in situ turbidimetry. The influence of stirring rate and deaeration was determined. Aggregates of hydrophilic particles were small and fragile, whereas aggregates of hydrophobic particles were large and solid. Moreover, they differred greatly in optical properties. Within the proposed approach, different features of the aggregate morphology were identified: fractal dimension, maximum size, and gas content of the hydrophobic clusters. These elements are taken into account in the models of aggregation dynamics proposed here.
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Journal of Colloid and Interface Science, Elsevier, 2005, 284 (2), pp.548-559. 〈10.1016/j.jcis.2004.10.020〉
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https://hal-emse.ccsd.cnrs.fr/emse-00504654
Contributeur : Andrée-Aimée Toucas <>
Soumis le : mercredi 21 juillet 2010 - 08:20:36
Dernière modification le : jeudi 11 janvier 2018 - 06:21:23

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Frédéric Gruy, Michel Cournil, Patrick Cugniet. Influence of nonwetting on the aggregation dynamics of micronic solid particles in a turbulent medium. Journal of Colloid and Interface Science, Elsevier, 2005, 284 (2), pp.548-559. 〈10.1016/j.jcis.2004.10.020〉. 〈emse-00504654〉

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