Kinetics of Compositional Ripening in Emulsions Stabilized with Nonionic Surfactants

Solubilization rates of oils in surfactant solutions and their relationship to mass transport in emulsions

“…(20) was applicable in this mixed oil system with c B ≠ 0 for decane and c I given by Eq. (13) [9]. The numerical results are presented as dashed lines for the drop size distribution, and as dash-and-dot lines for the corresponding cumulative distribution function.…”

“…Solubilization rates measured for individual droplets are incorporated in this mass balance by combining it with suitable expressions for dR/dt, as discussed in Sections 2 and 3. In some cases, analytical solutions for transient droplet sizes are feasible [9,26]. Otherwise, the evolution of drop radii must be determined numerically [50].…”

“…Fig. 4 shows (symbols) data obtained by the oil drop technique described in Ref [9] for the n-octane/C 12 E 8 system at 30.9°C for surfactant concentrations between 0.25 and 3.75 wt.%, all well above the cmc. Drop radius decreases linearly with time for surfactant concentrations equal to or greater than 1 wt.%, suggesting that for these conditions the rate is limited by interfacial phenomena as discussed previously.…”

“…This drop-on-fiber technique has been implemented in subsequent solubilization studies [2][3][4][5]. Miller et al [6][7][8][9] and Kralchevsky et al [10,11] used videomicroscopy and microphotography to record the transient behavior of micrometer droplets injected into capillaries filled with aqueous surfactant solutions without using microfibers to fix the position of the drops. Wen and Papadopoulos [12] used a similar technique to measure water transport rates across an oil film.…”

Mass Transfer of Water-insoluble Organic Compound from Octadecylsilyl-silica Gel into Water in the Presence of a Nonionic Surfactant

“…For the solubilization of water-insoluble oils using nonionic surfactants, the direct detachment of the surfactant micelles at the oil/water interface to move the oil molecules into the aqueous micellar solution has been proposed. [24][25][26] We consider that ks is related to such a micelle-mediated solubilization of perylene by Triton X-100 at the microparticle surface.…”