Droplet coalescence in aqueous electrolyte solutions
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Cited by (21)
Detailed analysis of single drop coalescence—Influence of ions on film drainage and coalescence time
2016, Chemical Engineering Research and DesignCitation Excerpt :Hydrophobic effects, intensified by cosmotropic ions, are responsible for the separation of oil/water mixtures. Stevens et al. (1990) observed coalescence suppression for n-butyl acetate with the addition of salt. This could be led back to the linkage of hydrogen bridges resulting from the effect of cosmotropic ions.
Review and perspectives of AFM application on the study of deformable drop/bubble interactions
2015, Advances in Colloid and Interface ScienceCitation Excerpt :The DLVO theory can explain the stability of many colloidal systems. However, other forces originating from the solvent structure or the polar nature of the organic liquids have also been reported [73–75]. These forces, including hydrophobic attraction [76] and hydrophilic repulsion [77], are defined as non-DLVO forces.
A one-step process for oil-in-water-in-oil double emulsion formation using a single surfactant
2012, Journal of Colloid and Interface ScienceCitation Excerpt :Therefore, the influence of these electrolyte ions on surface charge will be determined principally by their effect on the ionic strength of the surrounding solution, which is usually characterized by the Debye screening length [33]. With an increase in the ionic strength of the medium, there is a decrease in Debye screening length and as a result, the interfacial charge decreases [45]. In our case, due to the presence of salt, interfacial charging was suppressed [46].
Phase inversion in agitated liquid-liquid dispersions: Anomalous effect of electrolyte
2012, Chemical Engineering ScienceCitation Excerpt :These values are reported in Table 1. An increase in the electrolyte concentration decreases the double layer thickness, which decreases the repulsion between the colliding drops (Zhang et al., 2010) carrying latent charge on them (Stevens et al., 1990; Marinova et al., 1996; Fernandes et al., 2001). An increase in electrolyte concentration for w/o dispersion is expected to increase the rate of coalescence of oil droplets in water drops with the external oil phase (Pacek et al., 1994; Kumar, 1996), and thereby reduces the effective volume fraction of composite water drops containing oil droplets in them.
Drop coalescence in planar extensional flow and gravity
2009, Chemical Engineering ScienceExperimental investigation on bubble coalescence under nonuniform temperature distribution in reduced gravity
2007, Journal of Colloid and Interface ScienceCitation Excerpt :Bubble or drop coalescence in another immiscible liquid is a common physical phenomenon in material processing and welding on ground or in space. Many studies were carried out on the bubble and drop coalescence on ground, including measuring coalescence time (time that the bubble stays at the interface before coalescence occurs) [1–3]; changes in thickness of thin liquid film [4,5]; effects of applied force and approach velocity on coalescence [5]; effects of surfactants on coalescence [1,3,6]. Only a few studies related to the coalescence under microgravity [1,7].
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Present address: Institute of Nuclear Energy Technology, Tshinghua University, Beijing, China.