Abstract
In this study, polycaprolactone (PCL) and progesterone (PG) tablets were produced by selective laser sintering (SLS) using different particle sizes and laser energy. The sintered PCL/PG tablets presented uniform morphology, coalescence of particles and interconnected pores distributed in the polymeric matrix. The EDS analysis confirmed the presence of progesterone recrystallized on the surface of the porous PCL matrix. The crystallinity values for the PCL/PG tablets were lower than that for the pure PCL, suggesting the interaction of components at the molecular level. The PCL/PG tablets fabricated with small particles and high laser energy presented a higher value for the flexural modulus compared with the other specimens. The glass transition temperature (Tg) was −37 °C for the PCL/PG tablet with a high degree of sintering. The fatigue test showed that the PCL/PG blend tablets have high fatigue strength. The drug release mechanism of all tablets studied followed a zero-order kinetics, and drug release rates were dependent on sintering degree and, consequently, on matrix erosion, showing a potential application to controlled drug delivery in hormone cancer therapy.
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The authors would like to thank PRONEX/FAPESC, CNPQ and FINEP for financial support and the Center of Microscopy-UFSC for providing the micrographs.
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Salmoria, G.V., Klauss, P. & Kanis, L.A. Laser Printing of PCL/Progesterone Tablets for Drug Delivery Applications in Hormone Cancer Therapy. Lasers Manuf. Mater. Process. 4, 108–120 (2017). https://doi.org/10.1007/s40516-017-0040-4
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DOI: https://doi.org/10.1007/s40516-017-0040-4