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The Preparation of Solvent-Free Polyurethane Laminating Adhesive with Mixed-Polyols
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Activation of Corn Starch and Effect of the Activation on its Reactivity
p.183
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Activation of Corn Starch and Effect of the Activation on its Reactivity

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Abstract:

Native corn starch (NS) was activated by treatment with NaOH /Urea /H2O solution at low temperature to improve its chemical reactivity. Effects of the activation on the molecular level structure and morphology of the corn starch were investigated by mean of SEM. It was found that the average particle size of activated corn starch (AS) decreased to nanometer level, smaller than those of NS. The cold water solubility (CWS) has been increased from 0.45% to 96.4%. Effects of the activation on reactivity of the corn starches were investigated by analyzing the influences of the activation on degrees of substitutions (DS) of the esterifications. The DS of AS was higher than that of NS, from 0 to 0.1578, which indicated that NaOH/urea activation enhanced the chemical reaction activity of corn starch.

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Periodical:

Advanced Materials Research (Volume 549)

Pages:

183-187

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.549.183

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Online since:

July 2012

Authors:

Yan Wang, Jia Ying Xin, Tie Liu, Kai Lin, Chao Yue Zhang, Chun Gu Xia

Keywords:

Activation, Cold Water Solubility, Corn Starch (CS), Esterification, Reactivity

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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