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
Keywords: α-zein, krill oil, nanospheres, colloidal stability

Abstract

Nanospheres of a-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, z-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 z-potential value around -25 mV are stable at neutral to basic pH values based on their z-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. All types of nanoparticles were capable to nano-entrap appreciable amounts of a hydrophobic krill oil extract.

Published
2019-05-23
How to Cite
Sánchez-Juárez, C., Reyes-Duarte, D., Campos-Terán, J., Hernández-Sánchez, H., Vera-Robles, L., Hernández-Arana, A., & Arroyo-Maya, I. (2019). STUDY OF THE PROPERTIES AND COLLOIDAL STABILITY FOR THE TECHNOLOGICAL APPLICATION OF ZEIN-BASED NANOSPHERES. Revista Mexicana De Ingeniería Química, 18(2), 715-728. https://doi.org/10.24275/uam/izt/dcbi/revmexingquim/2019v18n2/Sanchez
Section
Food Engineering

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