LI Yanan, SHENG Yangchen, MOU Anqiong, GUO Mengyu, ZHAO Yajie, LI Liang, ZHANG Erhao, LIU Zhendong, LUO Zhang
Corn starch has an important application in the food industry.However, its application in the food processing field is greatly restricted due to its poor thermal stability, weak anti-shear ability, and low solubility and vulnerability to aging.Some research indicates that the addition of polysaccharides can effectively improve the corn starch properties.In this experiment, three different ionic polysaccharides, including anionic polysaccharide xanthan gum, neutral polysaccharide locust bean gum, and cationic polysaccharide chitosan, were added to explore their effects on the pasting property, texture property, short-range orderliness, and physiochemical properties of corn starch by means of RVA-TecMaster rapid viscosity analyzer, Nicolet iS 50 attenuated total reflection-fourier transform infrared spectrometry, and TA-XT.Plus texture analyzer.Results suggested that the three different ionic polysaccharides significantly affected the pasting property, short-range orderliness, texture property, and physiochemical properties of corn starch.Xanthan gum, as the anionic polysaccharide, had the homocharge repulsion interaction with the weakly negatively charged corn starch.After addition, the peak viscosity of corn starch decreased from 2 025.33 mPa·s to 1 654.50 mPa·s, the gel hardness declined from 484.06 g to 134.44 g, while the swelling capacity increased from 11.04 g/g to 15.43 g/g, which partially delayed the flocculation and precipitation of corn starch.After the addition of neutral polysaccharide locust bean gum, the gel hardness, flocculation and precipitation stability, and water binding capacity of corn starch significantly decreased.Different from anionic polysaccharide xanthan gum, the addition of cationic polysaccharide chitosan substantially increased the gel hardness, brittleness, and elasticity of corn starch.Infrared spectroscopy analysis demonstrated that the addition of three different ionic polysaccharides increased the short-range order on the surface of corn starch particles, and partially increased the short-term regeneration of corn starch.Collectively, the anionic polysaccharide xanthan gum, neutral polysaccharide locust bean gum, and cationic polysaccharide chitosan enhanced the application effect of corn starch in food and improved food taste, color, and morphology, which showed a broad application prospect in food processing.