Physicochemical and rheological properties of ultrasonic-assisted pregelatinized rice flour

Abstract

This study evaluated the physical and rheological properties of whole rice flour treated for different sonication times (0–15 min). Ultrasonication reduces the particle size of rice flour and improves its solubility. Viscosity tests using RVA and steady shear showed a notable decrease in the viscosity of the rehydrated pregelatinized rice flour. Although no unusual patterns were observed in the XRD analysis, the FT-IR and microstructure morphology findings suggest that ultrasonication led to structural changes in the rice flour. Overall, the study indicates that ultrasonication is a practical and clean method for producing plant-based drinks from rice flour, which could expand its limited applications in the beverage industry.

Keywords

• Pregelatinized rice flour
• Solubility
• Ultrasonication
• Physical modification