Preparation and Characterization of High-Substituted Cationic Starches in Aqueous Solutions

Xiu Li Wu; Ya Cui Guo; Pi Xin Wang

doi:10.4028/www.scientific.net/AMM.268-270.555

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 268-270Preparation and Characterization of...

Preparation and Characterization of High-Substituted Cationic Starches in Aqueous Solutions

Abstract:

In the presence of alkaline catalyst NaOH,the cationic corn starches bearing quaternary amino group with high degree of substitution are prepared by the reaction of the starch with 2, 3- epoxy propyl trimethylammonium chloride (ETA) in aqueous solutions.Under the conditions of molar ratio anhydroglucose/ETA/alkali =1: 4.0: 0.2025, reaction temperature 60°C and reaction time 6h, degree of substitution of the product is 1.0959. Structure of the product is characterized by FTIR and 13C NMR spectroscopy.X-ray diffraction indicates that the crystal structure of the native starch is destroyed and disordered structure of cationic starch is formed.