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Related Experiment Video

Updated: Apr 25, 2026

Extraction of Plant-based Capsules for Microencapsulation Applications
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Microencapsulation of krill oil using complex coacervation.

Sarya Aziz1, Jagpreet Gill, Pierre Dutilleul

  • 1Department of Food Science and Agricultural Chemistry, McGill University , Ste-Anne de Bellevue, QC , Canada .

Journal of Microencapsulation
|August 22, 2014
PubMed
Summary
This summary is machine-generated.

This study developed gelatin-gum Arabic microcapsules for krill oil (KO) using complex coacervation. Optimal conditions yielded 92% encapsulation efficiency (EE) for stable, multinuclear microcapsules.

Keywords:
Beef gelatinBox–Behnkengum Arabicmultinucleated capsules

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Area of Science:

  • Food Science and Technology
  • Materials Science
  • Chemical Engineering

Background:

  • Krill oil (KO) is a rich source of omega-3 fatty acids and astaxanthin.
  • Protecting KO from oxidation and improving its delivery is crucial for its application.
  • Complex coacervation offers a promising method for microencapsulation of sensitive compounds.

Purpose of the Study:

  • To develop a process for creating gelatin-gum Arabic multinuclear microcapsules of krill oil (KO).
  • To optimize encapsulation efficiency (EE) using a Box-Behnken design.
  • To characterize the physical properties and stability of the resulting microcapsules.

Main Methods:

  • Complex coacervation using gelatin and gum Arabic as wall materials.
  • Box-Behnken design to evaluate the effects of core-to-wall ratio (RCW), stirring speed (SP), and pH on EE.
  • Analysis of microcapsule morphology and stability.

Main Results:

  • The pH had the most significant linear and quadratic effects on EE, with a bilinear effect with RCW.
  • Stirring speed (SP) did not significantly affect EE.
  • Optimal conditions (RCW 1.75:1, pH 3.8, SP 3) achieved 92% EE.
  • Microcapsules were multinucleated, circular, and stable without cross-linking agents.

Conclusions:

  • Complex coacervation is effective for producing stable, multinuclear krill oil microcapsules.
  • pH and RCW are key parameters influencing encapsulation efficiency.
  • The developed microcapsules offer a viable delivery system for krill oil.