ABSTRACT: Controlling the aging degree of powder skin is the key to produce high quality and convenient powder skin. In this paper, the influence of different drying methods on aging characteristics of instant acorn powder was studied by infrared analyzer, X-ray diffraction and fast viscosity analyzer, and the microstructure of powder was studied and evaluated by scanning electron microscopy.
The results showed that compared with hot air drying, the iodine chroma of powder skin increased significantly (p < 0.05), the infrared absorbance and retrogradation value decreased significantly (p < 0.05), and the crystallinity also decreased. The powder skin has looser microstructure and larger voids. The aging degree of powder skin in microwave drying equipment is low.
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