Characteristics of partially gelatinized starch slurry

Partially gelatinized starch slurry was prepared from corn starch by steam heating. Partially gelatinized starch and corn starch was characterized by optical microscopy, particle size analysis,differential scanning calorimetry( DSC) and X-ray diffraction( XRD). The results showed that with the increase of preparation temperature,the polarization cross of partially gelatinized starch slurry fade away and crystallinity decreased,while the degree of gelatinization,particle size and swelling power increased.Most of polarization cross of partly gelatinized starch slurry prepared at 64 ℃ and having good stability disappear,but the crystallization peak still exists,and the gelatinization degree is of 72. 22%.