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Updated: Jun 22, 2026

Solid Lipid Nanoparticles (SLNs) for Intracellular Targeting Applications
08:19

Solid Lipid Nanoparticles (SLNs) for Intracellular Targeting Applications

Published on: November 17, 2015

Solid lipid nanoparticles produced through a coacervation method.

Luigi Battaglia1, Marina Gallarate, Roberta Cavalli

  • 1Dipartimento di Scienza e Tecnologia del Farmaco, Torino, Italy. luigi.battaglia@unito.it

Journal of Microencapsulation
|June 23, 2009
PubMed
Summary
This summary is machine-generated.

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A novel solvent-free coacervation technique successfully prepared solid lipid nanoparticles (SLN) from fatty acids. This method shows promise for creating monodisperse nanoparticles for effective drug delivery applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Pharmaceutical Sciences

Background:

  • Solid lipid nanoparticles (SLN) are crucial for drug delivery.
  • Existing SLN preparation methods often involve organic solvents.
  • Fatty acids (FAs) offer a biocompatible lipid matrix for SLN.

Purpose of the Study:

  • To develop a new, solvent-free method for preparing SLN using fatty acids.
  • To characterize the resulting SLN properties and encapsulation efficiency.
  • To evaluate the potential of this technique for drug delivery.

Main Methods:

  • Developed a 'coacervation' technique involving FA precipitation from sodium salt micelles.
  • Utilized polymeric non-ionic surfactants during the precipitation process.

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Last Updated: Jun 22, 2026

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  • Employed myristic, palmitic, stearic, arachidic, and behenic acids as lipid matrices.
  • Assessed encapsulation efficiency using Nile Red as a model lipophilic dye.

    • Main Results:

    • Achieved spherical solid lipid nanoparticles with diameters between 250-500 nm.
    • Successfully precipitated various fatty acids from their micellar solutions using aqueous acidifying agents.
    • Demonstrated good encapsulation efficiency of Nile Red within stearic acid nanoparticles.
    • The coacervation method yielded nanoparticles with a narrow size distribution.

    Conclusions:

    • The coacervation technique is a viable, solvent-free approach for SLN preparation.
    • This method offers potential for producing monodisperse nanoparticles suitable for drug delivery.
    • Fatty acid-based SLN prepared via coacervation represent a promising platform for pharmaceutical applications.