Abstract:

This paper aimed to investigate the effect of airflow ultrafine grinding on physicochemical properties such as
particle size, color, particle morphology, fluidity and water absorption of Rhodomyrtus tomentosa fruit powder. The results
showed that particle size of Rhodomyrtus tomentosa fruit powder decreased gradually, and color and texture was improved
significantly with increasing grinding time. Particle morphology became more consistent. Water-holding capacity, oilholding
capacity and expansibility were enhanced dramatically from 1.57, 0.76 g/g and 0.57 mL/g to 2.46, 1.08 g/g and
0.89 mL/g, respectively, but fluidity and water-solubility were reduced remarkably. In conclusion, airflow ultrafine grinding
with suitable parameters can improve the physicochemical properties of Rhodomyrtus tomentosa fruit power effectively.

Key words: Rhodomyrtus tomentosa, fruit power, airflow ultrafine grinding, physicochemical properties