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Food Science and Technology. 2011, (09) Core

Preparation of mechanical force and citric acid thermoplastic modified corn starchChinese Full Text

MA Li-sha, GAO Cui-ping, WU Yue, ZHANG Xiao-lin, YUAN Huai-bo*(School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009)

Abstract: Corn starch used as raw material to synthesis double-modified thermoplastic starch through the ultra-fine powder and citric acid and glycerol as modifiers. The optimum conditions of double-modified thermoplastic corn starch were researched. Under the reaction time is 60 min, the reaction temperature is 120 ℃, mass ratio of micronization corn starch:citric acid:glycerol was 1:0.4:0.3, obtained that double-modified thermoplastic starch are 0.259 degree of substitution and 0.346 degree of etherification, which are all higher than single-modified starch. Infrared spectroscopy confirmed that the lemon anhydride groups were introduced in starch. The X- diffraction showed the crystalline of double modified starch were dropped.
Keywords：

corn starch; degree of substitution; degree of etherification; thermoplastic;

  • DOI：

    10.13684/j.cnki.spkj.2011.09.071

  • Series：

  • Subject：

  • Classification Code：

    TS236.9

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