ABSTRACT In this study, starch nanoparticles (SNPs) were synthesized using a green and cost‐effective solvent‐free nanoprecipitation method, which yielded high‐purity SNPs with minimal contamination risk. These SNPs have potential applications in the pharmaceutical, food, and chemical industries. The effects of two key parameters—the starch concentration and the starch‐to‐ethanol volume ratio—on the physicochemical properties of SNPs were evaluated. The SNPs were characterized by dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FT‐IR), contact angle measurement, and field emission scanning electron microscopy (FE‐SEM) techniques. The results showed that the smallest SNPs (49 nm) were obtained using a 1% w/v starch solution at a 1:5 starch solution‐to‐ethanol volume ratio. An increase in the starch concentration from 1% to 3% (w/v) in a 1:5 (v/v) starch solution‐to‐ethanol ratio increased the SNP particle size from 49 nm to 342 nm. Furthermore, SNPs synthesized in a 1% w/v starch solution with a 1:10 starch solution‐to‐ethanol ratio showed a more spherical and regular morphology than other nanoparticles. The maximum contact angle was 49.5° for a 2% w/v starch solution with a 1:10 (v/v) starch solution‐to‐ethanol ratio, Pickering emulsions were successfully fabricated from this SNPs and characterized through photographic analysis and emulsion index measurement, yielding an emulsion index value of 0.9.
Momenpoor et al. (Sun,) studied this question.