Raspberry-liked Pickering emulsions based inulin microparticles for enhanced antibacterial performance of essential...

Area of Science:

• Food Science and Technology
• Materials Science
• Biotechnology

Background:

• Pickering emulsions offer effective strategies for encapsulating and stabilizing essential oils.
• Mosla chinensis 'Jiangxiangru' essential oil (MJO) requires enhanced stability and delivery systems.
• Ethyl lauroyl arginate (ELA) decorated nanosilica (ELA-NS) presents potential as a Pickering emulsifier.

Purpose of the Study:

• To develop a novel raspberry-liked Pickering emulsion (RPE) for Mosla chinensis 'Jiangxiangru' essential oil (MJO) stabilization.
• To encapsulate the MJO-RPE within inulin-based microparticles (IMP) for improved properties.
• To evaluate the stability, loading capacity, and antibacterial efficacy of the developed MJO-RPE-IMP.

Main Methods:

• Engineered raspberry-liked Pickering emulsions (RPE) using ethyl lauroyl arginate (ELA) decorated nanosilica (ELA-NS) as emulsifiers.
• Stabilized MJO-RPE using optimized ELA-NS concentrations (2% NS, 0.1% ELA).
• Prepared MJO-RPE-IMP via spray-drying with inulin as matrix formers.

Main Results:

• Achieved long-term stability for MJO-RPE with optimized ELA-NS.
• Raspberry-liked morphology observed on MJO-RPE due to ELA-NS surface coverage.
• Inulin-based microparticles demonstrated high loading capacity (98.54%), superior thermal stability, and redispersibility.
• MJO-RPE-IMP exhibited enhanced antibacterial efficacy against E. coli, S. aureus, and P. aeruginosa compared to MJO alone.

Conclusions:

• The developed MJO-RPE-IMP system effectively enhances the stability and antibacterial activity of MJO.
• Raspberry-liked Pickering emulsion composite microparticles are a promising strategy for essential oil delivery.
• The enhanced antibacterial properties are attributed to the unique surface morphology and improved MJO bioavailability.