Encapsulation of Volatile Compounds in Silk Microparticles.

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Food Science

Background:

• Microencapsulation is crucial for stabilizing and delivering active compounds like fragrant oils in various industries.
• Current methods often involve chemical agents or harsh conditions, limiting applications for natural products.

Purpose of the Study:

• To develop an all-natural, biocompatible microparticle system for encapsulating fragrant oils.
• To utilize silk protein and ambient processing for creating a sustainable encapsulation matrix.
• To control the release profile of encapsulated oils through tailored coatings.

Main Methods:

• Fabrication of silk protein microparticles using polyvinyl alcohol-silk emulsions under ambient conditions.
• Loading of fragrant oils via direct immersion into the silk microparticles.
• Coating of oil-loaded microparticles with alternating layers of silk and polyethylene oxide.
• Characterization of particle morphology, size, oil loading, release rates, and silk-oil interactions using thermal analysis.

Main Results:

• Successfully created all-natural, biocompatible silk protein microparticles capable of encapsulating fragrant oils.
• Demonstrated that silk coatings can be tuned to modify oil retention and release rates.
• Characterized the physical and chemical properties of the silk-oil microparticles and their coatings.

Conclusions:

• Silk protein microparticles provide a viable, natural matrix for fragrant oil encapsulation.
• The developed system allows for controlled adsorption and release of oils.
• Potential applications include cosmetics, fragrances, and other industries requiring controlled delivery of oils.