Dados do Trabalho

Título

EFFECTS OF HIGH SHEAR HOMOGENIZATION ON THE STRUCTURAL AND PHYSICOCHEMICAL PROPERTIES OF POTATO STARCH GRANULES

Introdução

High Shear Homogenization (HSH) is an environmentally friendly and scalable method for the physical modification of starch granules, offering potential applications for the food sector.

Material e Métodos

The current work investigated the effect of HSH treatments at 8000 rpm for 5 min on the physical, morphological and thermal properties of different potato starch dispersions (100 g/L, 200 g/L and 300 g/L).

Resultados e Discussão

Scanning electron microscopy and laser diffraction analysis showed a significant decrease in granule diameter, from approximately 40.00 μm to 16.00 μm, after HSH treatments. XRD patterns indicated a decrease in crystallinity post-treatment, while thermogravimetric analysis demonstrated reduced thermal stability in treated starches (290°C – 300°C) compared to native starch (300°C – 320°C). Notably, the swelling power of treated starches increased to ~50%, compared to ~45% for native starch. Despite these changes, treated starch granules maintained similar moisture content (~12.0%) and water activity (~0.4) as native starch.

Conclusão

These findings provide fundamental insights into the physical properties of modified starches, highlighting the potential of high-speed shear as an emerging technology for starch modification.