Influence of Oil Droplet Size on Flocculation/Coalescence in Surfactant-Free Emulsion

摘要

We investigated the influence of oil droplet size on the growth processes (flocculation and/or coalescence) of benzene and fluorobenzene droplets ultrasonically dispersed in water by freeze-fracture electron microscopy (FFEM). Oil droplets with the size 100～1000 nm (M class) and those with the size of ≥1000 nm (L class) were formed through flocculation of small droplets (100 nm, S class) and coalescence of M class droplets, respectively. Furthermore, FFEM observation verified the presence of benzene and fluorobenzene droplets with diameters below 100nm and appearance of discrete distributions of S and M class droplets.