The highly efficient degradation of the controllable molecular weight of sodium alginate in a heterogeneous system
YANG Yingge1*, HUANG Jixiang2, LI Rong3
1(School of Pharmaceutical and Food, Xuzhou Vocational College of Bioengineering, Xuzhou 221006, China) 2(Heze High Technology Zone Youke Biology Science and Technology Co, Ltd, Heze 274000, China) 3(School of Western Cuisine, Shandong City Service Technician College, Yantai 264670, China)
Abstract: This study aimed to explore the degradation processing parameters of sodium alginate in a heterogeneous system. By measuring viscosity value, the effects of temperature, catalyst dosage and time in degradation process were investigated by the single-factor experiment and the Box-Behnken method. The degradation of products with different viscosity were selected and observed by FT-IR and SEM methods, and the molecular weight was determined by GPC-RI-MALS method. Within the parameter range, the degradation degree was positively correlated with the temperature, catalyst dosage and time. In the solid-liquid ratio of 1∶4 (g∶mL), the optimal conditions were obtained as follows: The catalyst dosage of 1.0 g/10g sodium alginate at 61.53 ℃ for 5 h. In this condition, the average molecular weight of the degradation product was 15.4 kDa. The molecular weight of the degradation products could be controlled by regulating the degradation parameters and a series of products with 15 kDa-110 kDa number-average molecular weight were obtained. The FT-IR results showed that the structure of the chain did not change after the degradation. The SEM photographs showed that the degradation occurred firstly on the surface of polysaccharide particles and then extended to the interior. The degradation of sodium alginate in the heterogeneous system had high efficiency and simplicity of operation was easy to magnify on the industrial scale.
杨英歌,黄继翔,李荣. 海藻酸钠的可控分子质量高效非均相降解[J]. 食品与发酵工业, 2021, 47(12): 133-139.
YANG Yingge,HUANG Jixiang,LI Rong. The highly efficient degradation of the controllable molecular weight of sodium alginate in a heterogeneous system[J]. Food and Fermentation Industries, 2021, 47(12): 133-139.
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