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PLGA Nanoparticles Formed by Single- or Double-emulsion with Vitamin E-TPGS

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Published on: December 27, 2013

Shellac-based nanoparticles provide highly stable Pickering emulsions.

Keren Delmar¹, Havazelet Bianco-Peled¹

¹Department of Chemical Engineering, Technion - Israel Institute of Technology, Haifa 32000, Israel.

International Journal of Biological Macromolecules

|March 12, 2025

Summary

Modified shellac nanoparticles effectively stabilize Pickering emulsions. Tailored nanoparticles, especially Sh-ED2003, offer robust emulsion stabilization for diverse applications.

Keywords:

Nanoparticles Pickering emulsion Shellac

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Area of Science:

Materials Science
Colloid and Surface Chemistry
Biomaterials Science

Background:

Shellac, a natural resin, is explored for its potential in emulsion stabilization.
Pickering emulsions, stabilized by solid particles, are gaining interest for their unique properties.
Chemical modification of natural materials can enhance their functionality for advanced applications.

Purpose of the Study:

To investigate the efficacy of modified shellac nanoparticles (NPs) in stabilizing Pickering emulsions.
To compare the performance of two types of modified shellac NPs (Sh-M600 and Sh-ED2003).
To explore the potential applications of these stabilized emulsions in various industries.

Main Methods:

Shellac was chemically modified using Jeffamine® M600 and Jeffamine® ED2003 to create NPs.
Oil-in-water emulsions were prepared using isopropyl myristate (IPM) and stabilized with the modified NPs.
Emulsion stability was assessed through visual observation, accelerated conditions, cryo-SEM imaging, interfacial tension measurements, adsorption energy calculations, and rheological analysis.

Main Results:

Sh-M600 stabilized emulsions were stable up to 40% oil for 6 months.
Sh-ED2003 stabilized emulsions showed stability up to 65% oil, even under accelerated conditions.
Cryo-SEM and interfacial tension data confirmed NP adsorption at the oil-water interface, with Sh-ED2003 exhibiting superior stabilization capacity.
Rheological analysis indicated higher viscosity in Sh-ED2003 stabilized emulsions due to the modifier's higher molecular weight.

Conclusions:

Tailored shellac NPs, particularly Sh-ED2003, are effective stabilizers for robust Pickering emulsions.
The modification strategy significantly influences the stabilization performance of shellac NPs.
These findings suggest promising applications for modified shellac NPs in the food, pharmaceutical, and agricultural sectors.