Differences between rose superfine powder (RSFP) and rose fine powder (RFP) in terms of particle size distribution, specific surface area, micro-morphology, absorption intensity of chemical functional groups, and the stability of their dispersed aqueous solution were investigated using several techniques, including laser diffraction particle size analysis, scanning electron microscopy (SEM), infrared spectroscopy (IR), Zeta potential analysis, and turbidity analysis. In addition, differences in water holding capacity (WHC), oil holding capacity (OHC), and solubility between RSFP and RFP were also studied. The results showed that most tissue structures and cell walls were broken down in RSFP. The relative absorption intensity of the functional groups in IR was higher in RSFP than in RFP. Furthermore, the dispersed aqueous solution of RSFP was more stable compared to that of RFP. As the temperature increased, the turbidity values of both dispersed aqueous solutions showed a decreasing trend followed by an increasing trend and reached the lowest value at 80 ℃. Temperature had a small effect on the stability of the RSFP dispersed aqueous solution. Moreover, although the turbidity of the dispersed aqueous solution of RSFP and RFP was affected by the ionic strength, RSFP was more resistant to intensity changes in buffer ionic strength than was RFP after being subjected to a boiling water bath. The WHC and OHC of RSFP decreased compared to those of RFP, while the solubility increased.
