该研究以玉米淀粉为原料，乙二胺和邻苯二胺为胺化试剂，通过交联-醚化-胺化、交联-氧化-胺化两种改性方式合成了四种氨基淀粉并比较了其结构和功能性质。研究发现通过交联-氧化-胺化引入邻苯二胺的氨基淀粉具有最高的氮含量（5.97%）和氨基含量（3.07%），仍具有光滑的颗粒外观，结晶度（5.43%）与溶解度（11.31%）较高，也具有较高的淀粉链分解温度（220 ℃）和短程有序性（0.63），且此氨基淀粉在1 h内的DPPH•和ABTS+•清除效率最高，分别达到了27.90%和58.12%；而通过此方法引入乙二胺的氨基淀粉具有最高的结晶度（6.02%）和溶解度（91.45%），但淀粉链分解温度（170 ℃）和短程有序性最低（0.46），并产生了块状结构。交联-醚化-胺化法合成的氨基淀粉的颗粒结构破损严重，结晶结构完全消失，溶解度及抗氧化能力较差。综上所述，通过交联-氧化-胺化引入邻苯二胺的氨基淀粉具有优良的结构及功能性质和药物负载及重金属吸附的潜力，且上述结果为氨基淀粉的应用开发提供了一定的参考依据。

In this study, corn starch was used as the raw material, ethylenediamine and o-phenylenediamine were used as the amination reagents, four amino starches were synthesized by two modification methods, crosslinking-etherificationamination, and crosslinking-oxidation-amination, and their structural and functional properties were compared. It was found that the amino starch prepared through introducing o-phenylenediamine via crosslinking-oxidation-amination had the highest nitrogen content (5.97%) and amino content (3.07%), smooth particle/granular appearance, relatively high crystallinity (5.43%) and solubility (11.31%), relatively high starch chain decomposition temperature (220 ℃) and short-range ordering (0.63), and the highest DPPH• and ABTS+• scavenging efficiencies within 1 h (27.90% and 58.12%, respectively). The amino starch introduced with ethylenediamine via crosslinking-oxidation-amination had the highest crystallinity (6.02%) and solubility (91.45%), but the lowest starch chain decomposition temperature (170 ℃) and short-range order (0.46). In addition, blocklike structure was generated in this amino starch. The granular structure of the amino starch synthesized by the cross-linking-etherification-amination method was seriously damaged, with its crystalline structure disappearing completely, and solubility and antioxidant capacity being poor. In summary, the amino starch with o-phenylenediamine introduced via cross-linkingoxidation-amination have excellent structural and functional properties, and high potential for drug loading and heavy metal adsorption. The above results provide a certain reference for the application development of amino starches.

广西中青年教师基本能力提升项目（2023KY0014）；全国大学生创新创业培训项目（202210593025）