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<p>Starch nanoparticles (SNPs) have received considerable attention due to their biodegradability, nontoxicity, and tunable functional properties. In this study, SNPs were prepared by treating four different botanical origins of starch (wheat, rice, cassava, and potato) with a deep eutectic solvent (DES) consisting of choline chloride and oxalic acid dihydrate. Subsequently, the microstructure and physicochemical properties of SNPs prepared from starch of different botanical origins were systematically investigated. The relative crystallinity of SNPs was significantly lower than that of native starches (NS), as evidenced by XRD, while a crystallization transition from type B to type C was observed in PSNPs. Moreover, the thermal depolymerization onset temperature and the thermal stability of PSNPs were notably lower than those of other SNPs. Furthermore, FTIR spectroscopy confirmed the incorporation of oxalic acid half-esters into the SNPs. These findings suggest that SNPs can serve as effective reinforcements in biodegradable nanocomposites for packaging applications, as well as stabilizers for Pickering emulsions in food and pharmaceutical formulations.</p>

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Physicochemical properties of starch nanoparticles from different botanical origins starch prepared by the deep eutectic solvent method

  • 期刊论文

  • 发表日期：

    2025年5月20日

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  • Junlong Wang,
  • Qian Xiao,
  • Zhengtao Zhao

摘要

Starch nanoparticles (SNPs) have received considerable attention due to their biodegradability, nontoxicity, and tunable functional properties. In this study, SNPs were prepared by treating four different botanical origins of starch (wheat, rice, cassava, and potato) with a deep eutectic solvent (DES) consisting of choline chloride and oxalic acid dihydrate. Subsequently, the microstructure and physicochemical properties of SNPs prepared from starch of different botanical origins were systematically investigated. The relative crystallinity of SNPs was significantly lower than that of native starches (NS), as evidenced by XRD, while a crystallization transition from type B to type C was observed in PSNPs. Moreover, the thermal depolymerization onset temperature and the thermal stability of PSNPs were notably lower than those of other SNPs. Furthermore, FTIR spectroscopy confirmed the incorporation of oxalic acid half-esters into the SNPs. These findings suggest that SNPs can serve as effective reinforcements in biodegradable nanocomposites for packaging applications, as well as stabilizers for Pickering emulsions in food and pharmaceutical formulations.