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Electrostatic spray drying: A new alternative for drying of complex coacervates
Talita A Comunian1, Laura G Gómez-Mascaraque1, Audrey Maudhuit2
1Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, P25YN63, Ireland.
Food Research International (Ottawa, Ont.)
|May 17, 2024
Summary
This study developed a novel powder delivery system for flaxseed oil and quercetin using complex coacervation with soluble pea protein and gum arabic, followed by electrostatic spray drying for enhanced stability.
Area of Science:
- Food Science and Technology
- Biopolymer Chemistry
- Encapsulation Technologies
Background:
- Complex coacervation is a promising method for encapsulating bioactive compounds.
- Flaxseed oil and quercetin are valuable bioactive compounds with potential health benefits.
- Controlled delivery systems are needed to improve the stability and bioavailability of these compounds.
Purpose of the Study:
- To co-encapsulate flaxseed oil and quercetin using complex coacervation.
- To evaluate the effectiveness of soluble pea protein (SPP) and gum arabic (GA) as shell materials.
- To investigate the impact of electrostatic spray drying (ES) on the properties and stability of the coacervates.
Main Methods:
- Complex coacervation using SPP and GA.
- Electrostatic spray drying (ES) for powder formation.
- Analysis of encapsulation efficiency (EE), yield (EY), morphology, physicochemical properties, and stability over 60 days.
Main Results:
- Gum arabic (GA) demonstrated superior emulsifying activity, leading to smaller emulsion droplets.
- High encapsulation efficiency (73.4-76.0%) and yield (75.6-75.7%) were achieved for flaxseed oil.
- Stable, spherical microcapsules were formed with low moisture content (3.4-4.1%) and water activity (0.1-0.2).
- Significant quercetin content (8%) remained after 60 days with minimal hydroperoxide formation, indicating good stability.
Conclusions:
- The combination of GA as an emulsifier and SPP as a biopolymer in complex coacervation yields effective coacervates for food applications.
- Electrostatic spray drying (ES) offers a novel and effective method for producing stable coacervate powders.
- This study provides insights into biopolymer characteristics and drying processes influencing coacervate formation, aiding in the development of new delivery systems.
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