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Related Concept Videos

Micelles01:30

Micelles

Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...

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Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes
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Solid lipid nanoparticle preparation by a warm microemulsion based process: influence of microemulsion

P Fadda1, M Monduzzi, F Caboi

  • 1Neuroscienze PharmaNess S.c.a r.l., Edificio 5, Loc. Piscinamanna, 09010 Pula (CA), Italy.

International Journal of Pharmaceutics
|February 21, 2013
PubMed
Summary

Warm microemulsions (WME) are transformed into solid lipid nanoparticles (SLN) using novel quenching processes. Understanding WME microstructure is key to controlling SLN size and distribution for optimized nanoparticle production.

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Solid Lipid Nanoparticles (SLNs) for Intracellular Targeting Applications
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Published on: November 17, 2015

Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Pharmaceutical Nanotechnology

Background:

  • Warm microemulsions (WME) offer an alternative to high-pressure homogenization for producing solid lipid nanoparticles (SLN).
  • SLN properties are significantly influenced by the initial microemulsion composition and the subsequent nanoparticle formation process.
  • Optimizing WME microstructure is crucial for achieving desired SLN characteristics.

Purpose of the Study:

  • To define the microstructure of lecithin/water/tripalmitin/1-butanol/taurocholate sodium salt warm microemulsions at 70°C.
  • To investigate the impact of lecithin/butanol ratio, alcohol substitution, and taurocholate sodium salt concentration on microemulsion phase behavior.
  • To correlate WME microstructure with the characteristics of the resulting solid lipid nanoparticles.

Main Methods:

  • Phase behavior studies of lecithin (LCT)/water (W)/tripalmitin (TP)/1-butanol (B)/taurocholate sodium salt (ST) systems at 70°C.
  • Evaluation of microemulsion area variations with LCT/B ratio and alcohol (ROH) replacement.
  • Characterization of isotropic phase microstructure using (1)H NMR PGSE and electrical conductivity measurements.
  • Analysis of SLN size and distribution in relation to WME microstructure and quenching conditions.

Main Results:

  • Detailed phase diagrams for the LCT/W/TP/B/ST system at 70°C were established.
  • The influence of LCT/B ratio, alcohol type, and ST concentration on the microemulsion region was quantified.
  • Microstructural insights from NMR PGSE and conductivity guided the understanding of WME behavior.
  • A strong correlation was observed between WME microstructure and the final SLN properties.

Conclusions:

  • The microstructure of warm microemulsions is a critical determinant for producing solid lipid nanoparticles with controlled size (100-2000 nm) and narrow size distribution.
  • Optimized WME composition and processing conditions are essential for reproducible SLN manufacturing.
  • This study provides a framework for designing WME systems for efficient SLN production.