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Preparation of carboxymethyl potato starch using a new sodium carbonate pretreatment process and its
Yong Chen1, Cheng Tang1, Ziqiang Zhao1
1Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Pharmaceutical Engineering, Changsha University of Science and Technology, Changsha, Hunan Province, 410114, China.
Abstract:
Carboxymethyl starch (CMSt) is a modified starch with excellent performance. In this study, sodium carbonate pretreatment was used to promote the carboxymethylation reaction activity of starch, carboxymethyl starch with medium and low substitution degrees was successfully prepared, and the synthesis parameters of carboxymethyl starch were optimized using response surface methodology. The results showed that when the pretreatment concentration was 0.95 mol/L, the pretreatment time was 54 min, the molar ratio of alkali to starch was 1.3, and the molar ratio of acid to starch was 1, the carboxymethyl starch with a degree of substitution (DS) of 0.284 was obtained, which was 123.62 % higher than that without of the pretreatment process. The prepared carboxymethyl starch was used to encapsulate acai berry anthocyanins (ABA) in microcapsules, and the biomedical application of the prepared carboxymethyl starch was initially attempted. This study provided a new method for preparing carboxymethyl starch and attempted to explore the application value of this product in biomedicine.
