Evaporative Drying of Aqueous Dispersions of Solid Lipid Nanoparticles
- 1 January 2001
- journal article
- Published by Taylor & Francis Ltd in Drug Development and Industrial Pharmacy
- Vol. 27 (9), 919-924
- https://doi.org/10.1081/ddc-100107672
Abstract
Solid lipid nanoparticles (SLNs) have been proposed as alternative colloidal drug carriers. SLNs are obtained by dispersing warm oil-in-water microemulsions into cold water. The aim of this research was to investigate an evaporative drying process for aqueous dispersions of SLNs. For this purpose, a special apparatus, namely, a thermostatic minidesiccator having alumina as the drying medium, was designed to carry out the evaporative drying at a controlled temperature. Besides the water removal kinetics, the mean particle size and the size distribution of SLNs were measured during the drying with the aim of detecting the highest temperature at which the drying process can be carried out without significantly affecting the SLN average diameter. The SLN dispersions were evaluated with and without a hydrophilic excipient, commonly used as a cryoprotector (trehalose). The drying temperature of 10°C was found to be the most suitable for obtaining SLNs as a powder, maintaining almost the same size as that of the SLNs in dispersion.Keywords
This publication has 10 references indexed in Scilit:
- Body Distribution of Camptothecin Solid Lipid Nanoparticles After Oral AdministrationPharmaceutical Research, 1999
- Sterilization and freeze-drying of drug-free and drug-loaded solid lipid nanoparticlesInternational Journal of Pharmaceutics, 1997
- Gastrointestinal Uptake of Biodegradable Microparticles: Effect of Particle SizePharmaceutical Research, 1996
- Long acting injectable oxytetracycline-liposphere formulationsInternational Journal of Pharmaceutics, 1995
- Nanoparticles as carriers for oral peptide absorption: Studies on particle uptake and fateJournal of Controlled Release, 1995
- Preparation and evaluation in vitro of colloidal lipospheres containing pilocarpine as ion pairInternational Journal of Pharmaceutics, 1995
- Investigations on the physical state of lipid nanoparticles by synchrotron radiation X-ray diffractionInternational Journal of Pharmaceutics, 1993
- Preparation of submicron drug particles in lecithin-stabilized o/w emulsions I. Model studies of the precipitation of cholesteryl acetateInternational Journal of Pharmaceutics, 1992
- Peroral administration of nanoparticlesAdvanced Drug Delivery Reviews, 1991
- Analysis of Macromolecular Polydispersity in Intensity Correlation Spectroscopy: The Method of CumulantsThe Journal of Chemical Physics, 1972