Micromeritics of superfine powder of Chuanxiong Rhizoma / 中草药

ABSTRACT

Objective: To study the micromeritics of common powder and superfine powder of Chuan-xiong Rhizoma. Methods: Particle size and particle size distribution were detected by laser particle analyzer; Microscopic characteristics of the two sorts of powder of Chuanxiong Rhizoma were surveyed by biological microscope; The angle of repose and the bulk density were measured; The moisture absorption of common powder and superfine powder were determined on condition of 25°C and relative humidity of 75%. Results: D50 of common powder and superfine powder were 14.58 and 58.54 μm, and the superfine powder was more uniformly distributed. There were many differences between superfine powder and common powder in microscopic characteristics, including greatly smaller oil droplets in superfine powder. There was no significant change in flow ability, bulk density, and moisture absorption. Conclusion After being superfinely comminuted, the powder of Chuanxiong Rhizoma is more uniformly distributed with greatly increased broken cell wall. The oil droplets are much smaller in surperfine powder, which provides a preliminary basis for "emulsification structure". There is no significant change in flow ability, bulk density, and moisture absorption because of rich volatile oil in Chuanxiong Rhizoma.