Abstract
Capsicum annuum L. var. “Chile de árbol” combined with poly(lactic-co-glycolic acid) (PLGA) and TiO2-ZnO oxides synthesized at different molar ratios and pH (Ti-Zn A and B 3:1, 1:1, and 1:3) via the sol-gel method was characterized by the Brunauer–Emmett–Teller (BET) method, a UV-Vis spectrophotometer (UV-Vis), Fourier transform infrared spectroscopy (FT-IR), High-Performance Liquid Chromatography (HPLC-DAD), and a release profile through mathematical models to explain its behavior. Furthermore, FTIR revealed the presence of PLGA, TiO2, and ZnO as well as amino group characteristics from oleoresin components, principally alkaloid groups (capsaicin and dihydrocapsaicin), as evidenced by HPLC, to identify the presence of capsaicin and dihydrocapsaicin. The UV-Vis spectra showed a slight hypsochromic shift in the PLGA treatments. The release profile demonstrated a higher controllable release in the PLGA treatments than in the double nanoemulsions. Moreover, it is important to note that the effect of NPs influenced the release profile itself, increasing the release when NPs were synthesized at an acidic pH. Therefore, the TiZnOl/PLGA A characteristics suggest that these results have potential for pharmaceutical (as drug carriers) and medical applications.
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