Nanoparticles fabricated from bulk solid lipids: Preparation, properties, and potential food applications

Area of Science:

• Food Science and Technology
• Nanotechnology
• Materials Science

Background:

• Conventional emulsions have limitations in stabilizing encapsulated compounds.
• Solid lipids enable the creation of structured nanoparticles for enhanced delivery.
• Solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLCs) offer unique advantages over liquid-based systems.

Purpose of the Study:

• To review the preparation methods for SLNs and NLCs.
• To discuss the characterization parameters for these lipid nanoparticles.
• To explore the structure-property relationships governing the release of encapsulated compounds and their food applications.

Main Methods:

• Review of common preparation techniques for SLNs and NLCs.
• Analysis of characterization methods including dimensional, morphological, charge, thermal, and crystalline properties.
• Discussion of lipid and emulsifier chemistry influencing particle structure and release.

Main Results:

• SLNs and NLCs provide stable matrices for encapsulating bioactive compounds.
• The solid lipid matrix allows for controlled release kinetics of encapsulated substances.
• Particle structure (crystalline vs. imperfect/amorphous) significantly impacts release mechanisms.

Conclusions:

• SLNs and NLCs are promising delivery systems for bioactive compounds in food.
• Understanding lipid chemistry and preparation conditions is crucial for optimizing SLN and NLC performance.
• These nanostructured systems offer superior stability and controlled release compared to traditional emulsions.