Synthetic mechanism of octenyl succinic anhydride modified corn starch based on shells separation pretreatment

文献类型： 外文期刊

第一作者： Gao, Wei

作者： Gao, Wei;Liu, Pengfei;Cui, Bo;Abd El-Aty, A. M.;Gao, Wei;Liu, Pengfei;Cui, Bo;Gao, Wei;Sui, Jie;Abd El-Aty, A. M.;Abd El-Aty, A. M.

作者机构：

关键词： Synthetic mechanism; Octenyl succinic anhydride; Shells separation pretreatment

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）

ISSN： 0141-8130

年卷期： 2021 年 172 卷

页码：

收录情况： SCI

摘要： Herein, the synthetic mechanism of octenyl succinic anhydride (OSA) modified corn starch (OSCS) and granule shells (OSCs) based on shells separation pretreatment (SSP) was investigated. High intensity peaks around 1720 and 1570 cm(-1) were observed for OSCs in Fourier transform infrared (FTIR) spectra after SSP. OSCs showed higher degree of substitution (DS) values (ranging from 0.128 to 0.170) than OSCS (0.121) determined by H-1 NMR. The average molecular weight (M-w) of OSA modified CS decreased, due to the introduction of OS groups. X-ray diffraction (XRD) indicated that esterification mainly took place in the amorphous regions of starch granules. X-ray photoelectron spectroscopy (XPS) revealed that a new peak corresponding to Is orbital electrons of Na was obtained due to the introduction of OSA molecules. Meanwhile, lower surface DS and higher fluorescence intensity were noticed for OSCs. Conclusively, SSP would significantly increase the reaction efficiency of OSA modification process of CS. (C) 2021 Elsevier B.V. All rights reserved.

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