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Updated: Dec 26, 2025

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Changes in the Crystallinity Degree of Starch Having Different Types of Crystal Structure after Mechanical
Karina Dome1,2, Ekaterina Podgorbunskikh2, Aleksey Bychkov2,3
1Department of Natural Sciences, Novosibirsk State University, Pirogov Str. 1, Novosibirsk 630090, Russia.
Abstract:
This paper examines the effect of mechanical activation on the amorphization of starch having different types of crystalline structure (A-type corn starch; B-type potato starch; and C-type tapioca starch). Structural properties of the starches were studied by X-ray diffraction analysis. Mechanical activation in a planetary ball mill reduces the degree of crystallinity in proportion to pretreatment duration. C-type tapioca starch was found to have the highest degree of crystallinity. Energy consumed to achieve complete amorphization of the starches having different types of crystalline structure was measured. The kinetic parameters of the process (the effective rate constants) were determined. The rate constant and the strongest decline in the crystallinity degree after mechanical activation change in the following series: C-type starch, A-type starch, and B-type starch.
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