水力空化改性对玉米淀粉聚集态结构的影响

黄玉娟; 王昊翊; 黄永春; 黄承都

doi:10.13386/j.issn1002-0306.2021080187

水力空化改性对玉米淀粉聚集态结构的影响

Effect of Hydraulic Cavitation Modification on the Aggregation Structure of Corn Starch

摘要

摘要: 为了探究水力空化改性对玉米淀粉聚集态结构及物化性质的影响，本实验以玉米淀粉为研究对象，分别对其进行10、20、30、40、50 min的水力空化处理，并对处理后玉米淀粉的粒径分布、微观形貌结构、结晶结构、分子短程有序结构、膨胀力以及溶解度进行测定。结果表明：水力空化处理淀粉后，玉米淀粉颗粒的平均粒径增大，淀粉颗粒的表面出现圆锥形的裂缝和不均匀分布的圆形小孔，相对结晶度由22.25%增加至29.23%，分子短程有序程度先增大后降低，膨胀力由9.87 g·g⁻¹增加至13.10 g·g⁻¹，溶解度由8.94%增加至11.76%。水力空化产生空化效应可以改变玉米淀粉的聚集态结构。

Abstract: In order to explore the influence of hydraulic cavitation modification on the aggregate structure and physicochemical properties of corn starch, this experiment took corn starch as the research object, and treated it with hydraulic cavitation for 10, 20, 30, 40 and 50 min, respectively. After treatment, the particle size distribution, microscopic morphology structure, crystalline structure, molecular short-range order structure, the swelling power and solubility of corn starch were tested. The results showed that after hydrodynamic cavitation treatment of starch, the average particle size of corn starch granules increased, conical cracks and unevenly distributed circular pores appeared on the surface of starch granules, and the relative crystallinity increased from 22.25% to 29.23%. The degree of molecular short-range order first increased and then decreased, the swelling power increased from 9.87 to 13.10 g·g⁻¹, and the solubility increased from 8.94% to 11.76%. The cavitation effect produced by hydraulic cavitation could change the aggregated structure of corn starch.