Multiscale structure-property relationships of oxidized wheat starch prepared assisted with electron beam irradiation
Shen H. Yan M. Liu Y. Liu X. Ge X. Muratkhan M. Ospankulova G. Zhang G. Li W.
30 April 2023Elsevier B.V.
International Journal of Biological Macromolecules
2023#235
In this study, two promising eco-friendly modification techniques, electron beam (EB) irradiation and hydrogen peroxide (H2O2) oxidation, were used to prepare oxidized wheat starch. Neither irradiation nor oxidation changed starch granule morphology, crystalline pattern, and Fourier transform infrared spectra pattern. Nevertheless, EB irradiation decreased the crystallinity and the absorbance ratios of 1047/1022 cm−1 (R1047/1022), but oxidized starch exhibited the opposite results. Both irradiation and oxidation treatments reduced the amylopectin molecular weight (Mw), pasting viscosities, and gelatinization temperatures, while increasing the amylose Mw, solubility and paste clarity. Notably, EB irradiation pretreatment dramatically elevated the carboxyl content of oxidized starch. In addition, irradiated-oxidized starches displayed higher solubility, paste clarity, and lower pasting viscosities than single oxidized starches. The main reason was that EB irradiation preferentially attacks the starch granules, degrades the starch molecules, and depolymerizes the starch chains. Therefore, this green method of irradiation-assisted oxidation of starch is promising and may promote the appropriate application of modified wheat starch.
Electron beam irradiation-oxidation modification , Multiscale structure-property relationships , Wheat starch
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Engineering Research Center of Grain and Oil Functionalized Processing in Universities of Shaanxi Province, College of Food Science and Engineering, Northwest A&F University, 22 Xinong Road, Shaanxi, Yangling, 712100, China
Kazakh Agrotechnical University, Zhenis avenue, 62, Nur-Sultan, 010011, Kazakhstan
Engineering Research Center of Grain and Oil Functionalized Processing in Universities of Shaanxi Province
Kazakh Agrotechnical University
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