Journal
CARBOHYDRATE POLYMERS
Volume 298, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2022.120137
Keywords
Coarse cereals; Nanoparticles; Amylose content; Nanoprecipitation; Pickering emulsions
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Funding
- Shaanxi Province Key Research and Development Program Project [2021NY-155]
- Shaanxi Province Agricultural Science and Technology Innovation and Transformation Project [NYKJ-2020-YL19]
- National College Students' Innovation and Entrepreneurship Training Program [202210712206]
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Starch nanoparticles (SNPs) with different morphologies and particle sizes were prepared using coarse cereal starches. Ultrasonic pretreatment reduced the particle size of SNPs. Quinoa and waxy proso millet SNPs swelled to flocculent, while non-waxy proso millet and maize SNPs showed spherical particles. Quinoa SNPs formed a stable network and could be used as an efficient emulsifier.
Starch nanoparticles (SNPs) were prepared by rapid nanoprecipitation using coarse cereal starches, including quinoa, waxy proso millet, non-waxy proso millet, and maize starches (amylose content, 2.20 %-13.96 %). Morphology and dynamic light scattering analyses showed that the particle size of SNPs ranged from 190.35 nm to 310.25 nm. Ultrasonic pretreatment reduced the particle size. Quinoa and waxy proso millet SNPs swelled to flocculent, whereas non-waxy proso millet and maize SNPs showed spherical particles. Quinoa and waxy proso millet SNPs did not completely nucleate after nanoprecipitation. Quinoa SNPs formed a stable network in water, showing great viscoelastic behavior with higher G' and G. Subsequently, the SNPs suspensions were used to prepare emulsions. The quinoa SNPs-based Pickering emulsion was the smallest and most uniform (12.96 um), with great stability. These results suggested that the quinoa SNPs suspension with a stable network could be used as an efficient emulsifier for stabilizing Pickering emulsions.
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