Structural and physicochemical properties of composites between starch nanoparticles and β-carotene prepared via nanoprecipitation

Dong Heon Lee, Kang Sik Kwon, Duyun Jeong, In Ho Kim, Hee Soo Nam, Jong Yea Kim

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

To apply starch nanoparticles (SNP) as host materials for β-carotene encapsulation, aqueous SNP dispersions (10, 25, 50, and 100 mg/10 mL) and β-carotene in acetone (10, 50, 100, 150, and 200 μg/mL) were mixed. The acetone in the mixture was evaporated to prepare SNP and β-carotene composites, which were homogeneously dispersed in aqueous media with over 90 % solubility. When SNP content was higher than 50 mg, over 80 % of β-carotene was encapsulated in the composite matrix. X-ray diffraction, nuclear magnetic resonance spectroscopy, and transmission electron microscopic analyses confirmed the micellar-shaped composite particles with diameters <120 nm and an amorphous structure. High SNP content in the composites enhanced β-carotene stability under extremely hot and acidic conditions as well as against ultraviolet rays and oxidation reactions. The encapsulated β-carotene was not readily released in simulated gastric fluid, but was gradually released in simulated intestinal fluid via SNP digestion in the composites.

Original languageEnglish
Pages (from-to)100-110
Number of pages11
JournalInternational Journal of Biological Macromolecules
Volume214
DOIs
StatePublished - 1 Aug 2022

Keywords

  • Controlled release
  • Encapsulation
  • Nanoprecipitation
  • Stability
  • Starch nanoparticle
  • β-Carotene

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