Response Surface Optimization of Carboxymethyl Etherification Method for Preparing Water Chestnut Resistant Starch and Its Physicochemical Properties
This experiment uses horseshoe starch as raw material to prepare resistant starch through carboxymethyl etherification method.The yield of carboxymethyl etherified water chestnut resistant starch is used as the evaluation indicator.The preparation process is optimized through single factor experiment and Box Behnken response surface experiment,and sensory evaluation and physicochemical index analysis are carried out on the obtained product.The results showed that the optimal process parameters for preparing water chestnut resistant starch by carboxymethyl etherification method were 12%concentration of horseshoe starch emulsion,120%etherification agent dosage,and 43℃etherification temperature.Under this process,the yield of water chestnut resistant starch was 75.85%,which was close to the predicted value of 76.02%,indicating the reliability of the experimental results.This method can conveniently and efficiently produce horseshoe resistant starch with strong water holding capacity,relatively intact particles,and excellent quality,providing theoretical reference for industrial production.
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