Ostwald ripening in emulsions

Aging mechanisms of perfluorocarbon emulsions using image analysis

“…The aging mechanism seems to be dependent on both the composition of the emulsion and the conditions of storage. It is also shown in Table 3 that some emulsions, although showing a clear exponential increase in the droplet size, present very low coalescence constants, K, which may lead to wrong conclusions about their aging mechanism if these are followed for periods of time shorter than 20 days, as done by several authors [14,15,17,18]. This is probably one of the reasons why so often the aging mechanism for these emulsions is described as molecular diffusion in contradiction to the more diversified picture displayed by this study.…”

“…Two main mechanisms have been proposed for the loss of stability of these emulsions: coalescence and molecular diffusion [12]. Previous works dealt with dilute emulsions and short times of analysis and contradictory results have been reported in the literature, with most researchers supporting molecular diffusion as the most frequent aging mechanism [13][14][15][16][17][18].…”

Transfer of Oil between Emulsion Droplets

“…[9] - [11] for a Å 100 nm indicates that the droplet size should vary by less than 10% to ensure that the resulting variation in F is no more than 5%. From this expression, the turbidity t may be calculated as…”

Influence of interfacial properties on Ostwald ripening in crosslinked multilayered oil-in-water emulsions

“…The kinetics of Ostwald ripening are well described in terms of the theory which was first developed by Lifshitz and Slyozov and independently by Wagner (LSW theory) [3][4][5][7][8][9]. A major concern of manufacturers and scientists is therefore to better understand the factors that may influence Ostwald ripening so as to slow its rate or to prevent it from occurring in order to prolong the shelf life of the final product [4,10,11].…”