The complete dissolution of starch without degradation are necessary prerequisites for starch fractionation to obtain amylose or amylopectin (AP). With the recent, continuous progress in finding efficient and eco-friendly starch-dissolving solutions, applying new solvents for starch fractionation is important. In this study, the effects of dimethyl sulfoxide (DMSO), NaOH, and CaCl₂ solutions on starch structure and AP product parameters during starch fractionation were compared with respect to the starch deconstruction effect. This study proved that the CaCl₂ solution could effectively dissolve corn starch (50 °C, solubility of 98.96 %), and promote the regeneration of starch into uniform and fine particles. Furthermore, the three solvents (DMSO, NaOH, and CaCl₂) changed the crystal structure of corn starch, but they were all non-derivatizing solvents. The effect of the CaCl₂ solution on the molecular structure of corn starch was the least significant of the three solvents. Finally, the extraction rate of AP from the CaCl₂ solution reached 69.45 %. In conclusion, this study presents a novel and effective method for AP extraction.

淀粉完全溶解而不降解是淀粉分馏获得直链淀粉或支链淀粉（AP）的必要前提。近年来，随着寻找高效且环保的淀粉溶解解决方案的不断进展，应用新溶剂进行淀粉分馏变得非常重要。本研究比较了淀粉分馏过程中二甲基亚砜(DMSO)、NaOH和CaCl ₂溶液对淀粉结构和AP产物参数的影响以及淀粉解构效果。研究证明，CaCl ₂溶液能有效溶解玉米淀粉（50℃，溶解度98.96%），并促进淀粉再生为均匀细小的颗粒。此外，三种溶剂（DMSO、NaOH和CaCl ₂ ）改变了玉米淀粉的晶体结构，但它们都是非衍生化溶剂。 CaCl ₂溶液对玉米淀粉分子结构的影响是三种溶剂中最不显着的。最终CaCl ₂溶液中AP的提取率达到69.45%。总之，本研究提出了一种新颖有效的 AP 提取方法。