Lamellar structure change of waxy corn starch during gelatinization by time-resolved synchrotron SAXS
Kuang, QR; Xu, JC; Liang, YR; Xie, FW; Tian, F; Zhou, SM; Liu, XX
2017
发表期刊FOOD HYDROCOLLOIDS
ISSN0268-005X
卷号62页码:43-48
文章类型期刊论文
摘要In situ experiment of synchrotron small- and wide-angle X-ray scattering (SAXS/WAXS) was used to study the lamellar structure change of starch during gelatinization. Waxy corn starch was used as a model material to exclude the effect of amylose. The thicknesses of crystalline (d(c)), amorphous (d(a)) regions of the lamella and the long period distance (d(ac)) were obtained based on a 1D linear correlation function. The SAXS and WAXS results reveal the multi-stage of gelatinization. Firstly, a preferable increase in the thickness of crystalline lamellae occurs because of the water penetration into the crystalline region. Then, the thickness of amorphous lamellae has a significant increase while that of crystalline lamellae decreases. Next, the thickness of amorphous lamellae starts to decrease probably due to the out-phasing of starch molecules from the lamellae. Finally, the thickness of amorphous lamellae decreases rapidly, with the formation of fractal gel on a larger scale (than that of the lamellae), which gradually decreases as the temperature further increases and is related to the concentration of starch molecular chains. This work system reveals the gelatinization mechanism of waxy corn starch and would be useful in starch amorphous materials processing. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Waxy Starch Lamellar Structure Gelatinization Saxs Synchrotron
DOI10.1016/j.foodhyd.2016.07.024
收录类别SCI
语种英语
WOS记录号WOS:000382253900005
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27364
专题中科院上海应用物理研究所2011-2018年
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Kuang, QR,Xu, JC,Liang, YR,et al. Lamellar structure change of waxy corn starch during gelatinization by time-resolved synchrotron SAXS[J]. FOOD HYDROCOLLOIDS,2017,62:43-48.
APA Kuang, QR.,Xu, JC.,Liang, YR.,Xie, FW.,Tian, F.,...&Liu, XX.(2017).Lamellar structure change of waxy corn starch during gelatinization by time-resolved synchrotron SAXS.FOOD HYDROCOLLOIDS,62,43-48.
MLA Kuang, QR,et al."Lamellar structure change of waxy corn starch during gelatinization by time-resolved synchrotron SAXS".FOOD HYDROCOLLOIDS 62(2017):43-48.
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