Four different formulations based on starch, glycerol and fatty
acids were prepared. Corn starch was dispersed inwater in order to
obtain 2% (w/w) polysaccharide suspensions. These dispersions
were maintained, under stirring, at 95 C for 30 min to induce
starch gelatinization. Afterwards, plasticizer was added in
a starch:glycerol ratio of 1:0.25 and dispersions were homogenized
(13,500 rpm for 1 min and at 20,500 rpm for 5 min) at 95 C, under
vacuum, using a rotorestator homogenizer (Ultraturrax T25, Janke
and Kunkel, Germany). In the case of emulsions containing fatty
acids (1:0.15 starch:fatty acid ratio), these were incorporated prior
to the homogenization step. The homogenization at high temperature
favoured the lipid dispersion in the system.