Study of the properties and colloidal stability for the technological application of zein-based nanospheres

Translated title of the contribution: Study of the properties and colloidal stability for the technological application of zein-based nanospheres

C. Sánchez-Juárez, D. Reyes-Duarte, J. Campos-Terán, H. Hernández-Sánchez, L. I. Vera-Robles, A. Hernández-Arana, I. J. Arroyo-Maya

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Nanospheres of α-zein fabricated by antisolvent precipitation are promising carriers for hydrophobic bioactives in foods. The objective of this research was to study the changes in the properties of zein nanoparticles (size, ζ-potential, PDI, loading efficiency and pH colloidal stability) by using different copolymer coatings (sodium caseinate and pectin), ethanol concentrations (75 to 95% v/v) and solvent/antisolven or zein/krill oil ratios. Smallest particles (< 200 nm) can be obtained with the use of sodium caseinate as coating. This is the first time that zein nanospheres are used as encapsulating agents for a krill oil extract. These nanoparticles with a ζ -potential value around -25 mV are stable at neutral to basic pH values based on their ζ -potential and visual analysis. The use of pectin as coating produced the largest particles (< 400 nm) indicating that an increase in hydrophobic interactions allows the formation of bigger assemblies. Pectin-coated nanoparticles increased the LE of krill oil in about 9% compared with non-coated particles. Moreover, the krill oil/zein ratio was found to be a suitable way to increase the LE of the nanoparticles. The encapsulation of krill oil within the zein nanoparicles improved the antioxidant activity of the particles (noncoated and casein-coated particles). All types of nanoparticles were capable to nano-entrap appreciable amounts of a hydrophobic krill oil extract.

Translated title of the contributionStudy of the properties and colloidal stability for the technological application of zein-based nanospheres
Original languageEnglish
Pages (from-to)715-728
Number of pages14
JournalRevista Mexicana de Ingeniera Quimica
Volume18
Issue number2
DOIs
StatePublished - 2019

Keywords

  • Colloidal Stability
  • Krill Oil
  • Nanospheres
  • α-Zein

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