Green Synthesis and Characterization of Amine‐Modified Starch Nanoparticles

Abstract

AbstractIn 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.