The physical state and crystallization properties of curcumin in
the starch matrix was evaluated by DSC and XRD. For starch, no
specific endothermic peak was revealed while the broad thermal
transition from about 100 C to 200 C was attributed to evaporation
of free and bound water (Fig. 4) (Neo et al., 2013). Both the DSC
thermogram curves of native curcumin and curcumin-starch
physical mixture presented sharp endothermic peak at about
178 C which is the melting point of curcumin crystal (Pan, Zhong,
& Baek, 2013). In all the cur@star samples, the curcumin crystal
melting endothermic peak was vanished, indicating that after
loading into the matrix of starch curcumin lost its crystalline state