Article 2022 · 132 citations

Effects of different moisture contents on the structure and properties of corn starch during extrusion

Wang, Bin, Dong, Yuqing, Fang, Youxin, Gao, Wei, Kang, Xuemin, Liu, Pengfei, Yan, Shouxin, Cui, Bo, Abd El-Aty, A. M.

Abstract

Herein, corn starch samples with different moisture contents (native corn starch, 30, 35, 40, 45, and 50%) were prepared by twin-screw extrusion, and the structural and physical properties were analyzed and correlated. Scanning electron microscopy observed the morphology, attenuated total reflection-Fourier transform infrared spectroscopy investigated the double helix structure, X-ray diffraction analyzed the crystal region, ion chromatography observed the chain length distribution, and rapid viscosity analyzer measured the viscosity of corn starch samples. We found that the corn starch crystallinity, degree of order, and double helix degree decreased with increasing moisture content. The moisture content has a crucial role in the peak viscosity, breakdown, final viscosity, and setback in pasting property experiments. With the increase in moisture content, the longer chain was transformed into a shorter chain, and the dispersion of molecular weight distribution continuously increased. This study provides a theoretical basis for the production of extruded corn starch.

Keywords

Corn starch Different moisture contents Corn starch structure RICE STARCH PHYSICOCHEMICAL PROPERTIES DIETARY FIBER RETROGRADATION GELATINIZATION CRYSTALLINE POTATO MODEL HEAT

WoS Categories

Chemistry, Applied Food Science & Technology Nutrition & Dietetics

Sustainable Development Goals

Good Health and Well-being Zero Hunger

Citation

Journal: FOOD CHEMISTRY
Year: 2022
Volume: 368
ISSN: 0308-8146
eISSN: 1873-7072
DOI: 10.1016/j.foodchem.2021.130804
WoS UID: WOS:000709546500002

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