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This study theoretically examined attachment/detachment of negatively charged microparticles onto/from a negative planar surface carrying a positively charged square patch of different sizes. The surface element integration technique was used to calculate Derjaguin–Landau–Verwey–Overbeek (DLVO) interaction energies at different ionic strengths. Results show that a critical patch size is needed to...
This study systematically examined coupled influence of particle size and surface roughness on colloid detachment during transients in solution chemistry. A modified Derjaguin approach was utilized to three-dimensional which determined the variation of Derjaguin–Landau–Verwey–Overbeek (DLVO) interaction energies in detachment processes for elemental models of a rough surface: a hemisphere on a flat...
Demulsification of a synthetic water in oil (W/O) crude oil emulsion was studied by measuring water–oil interfacial properties such as life time and thinning rate of oil film in the presence of various demulsifiers. The results indicated that the interfacial elasticity decreased both the strength and the life time of oil film and film thickness when adding the demulsifiers. The oil film broke when...
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