From these analyses we can see that after the addition of curcumin,
the droplet size of microemulsions and their homogeneity
remain unchanged. Thus, the encapsulation of curcumin in microemulsions
no affects these systems and the microemulsions
resulted stable, with low tendency to aggregate. The dimensional
data obtained so far were compared with those obtained by TEM
analysis. TEM results confirmed the presence of droplets with size
less 30 nm (Fig. 3). Microemulsion C2 showed sphere-shaped and
uniform globules, with mean diameter of 18e30 nm, uniformly
dispersed, which did not tend to form aggregates. Also in the case of
the microemulsion C1, no aggregate were evidenced and the
globules showed size less than 30 nm (25e30 nm).
TEM analysis of C3 microemulsion showed the presence of small
spherical drops of oil with a mean diameter of about 20 nm,
coherent with nanometric dimensions obtained by DLS.