Abstract
This study focuses on the physicochemical characterization of lipid materials useful for the production of the so-called solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC). The chosen lipids were Dynasan®114 (glyceril trimyristate) and Dynasan®118 (glyceril tristearate) as solid lipids (SL), melting temperature above 80 °C, and Miglyol®812 (caprylic/capric triglyceride) and Miglyol®840 (propylene glycol dicaprylate/dicaprate) as liquid lipids (LL), crystallizing below −15 °C. Raw lipids (pure or SL:LL mixtures) were analyzed by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), and Polarized Light Microscopy (PLM), before and after tempering at 80 °C for 1 h. The selected SL:LL combination was 70% (Dynasan®114 and 118) and 30% (Miglyol®812 and 840) for the production of SLN and NLC by high-pressure homogenization (HPH), respectively. Particles with a mean size of 200 nm (polydispersity index <0.329) and zeta potential of −15 mV were obtained, and their long-term stability was confirmed for 3 months of storage at 7 °C.
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Acknowledgements
The authors wish to acknowledge the sponsorship of the (FAPESP) Fundação de Amparo e Pesquisa and CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior). The authors are also thankful to Fundação para a Ciência e Tecnologia do Ministério da Ciência e Tecnologia, under the reference PTDC/SAU-FAR/113100/2009.
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Severino, P., Pinho, S.C., Souto, E.B. et al. Crystallinity of Dynasan®114 and Dynasan®118 matrices for the production of stable Miglyol®-loaded nanoparticles. J Therm Anal Calorim 108, 101–108 (2012). https://doi.org/10.1007/s10973-011-1613-7
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DOI: https://doi.org/10.1007/s10973-011-1613-7