In this study, amine‐modified starch (AMS) nanoparticles are prepared from native sago starch (Metroxylon sagu) through a facile, economical, and aqueous‐based approach. Dialdehyde starch is initially synthesized by reacting sago starch with sodium periodate and followed by the addition of ethylenediamine for the preparation of AMS. The percentage of amine content and degree of substitution of AMS is determined by back‐titration technique. The degree of substitution of AMS is determined to be within the range of 0.9973 to 0.9984, respectively. Subsequently, AMS nanoparticles with mean particle diameters ranged between 170 and 280 nm are obtained by controlled precipitation through the drop‐wise addition of AMS solution into excess ethanol solution. The mean particle sizes of AMS nanoparticles are observed to be affected by the synthesis parameters including the ratio of solvent and non‐solvent system.

中文翻译：

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胺改性淀粉纳米粒子的绿色合成与表征

在这项研究中，胺改性淀粉（AMS）纳米粒子是由天然西米淀粉（Metroxylon sagu）通过一种简便，经济和基于水的方法。首先，通过使西米淀粉与高碘酸钠反应，然后添加乙二胺以制备AMS，来合成二醛淀粉。胺含量的百分比和AMS的取代度通过反滴定技术确定。确定AMS的取代度分别在0.9973至0.9984的范围内。随后，通过将AMS溶液逐滴添加到过量的乙醇溶液中，通过控制沉淀来获得平均粒径在170至280 nm之间的AMS纳米颗粒。观察到AMS纳米颗粒的平均粒径受合成参数的影响，包括溶剂和非溶剂体系的比例。