To improve the energy efficiency of the
sonication process, it is very important to determine the value of
optimal power density (power dissipated into the system) and
the sonication time [39,40]. In our work, optimum power density
and sonication time to prepare nanoemulsion (NEI) was found to
be 1.36 W/mL and 7 min, respectively. The pH of prepared NEI
was recorded as 5.57. Droplets of NEI were characterized for their
MDD, PDI, surface charge and morphology.