Non-Woven Fabrics Based on Nylon 6 and Polipropylene Impregnated with Extracts of Rosmarinus Officinalis Obtained by Ultrasound to Provide Antibacterial Properties

Abstract. In the present research work, a composite with antibacterial properties against Staphylococcus aureus based on Nylon 6 and Polypropylene (PP) nonwoven fabric impregnated with extracts of Rosmarinus officinalis is presented. The extracts were obtained using ethanol as an extracting solvent getting yield percentages of 14.67 % and assisted by ultrasound with a frequency of 60 kHz. In the characterization by high-performance liquid chromatography coupled to mass, it was found that it was possible to extract families such as hydroxycinnamic acids, methoxycinnamic acids, phenolic terpenes, and catechins. The antioxidant and antibacterial capacity of Rosmarinus officinalis extracts against Staphylococcus aureus and Escherichia coli were proved. The composites obtained were characterized by FTIR-ATR infrared spectroscopy, demonstrating that when Nylon 6 and PP nonwoven fabrics were impregnated with the extracts of Rosmarinus officinalis, the corresponding bands present in the chemical structures of the secondary metabolites of Rosmarinus officinalis were shown, by means of thermogravimetric analysis characterization, the composites were found to be stable at high temperatures, and the composites were shown to possess antibacterial properties against Staphylococcus aureus. Resumen. En el presente trabajo de investigación, se presenta la obtención de un compósito con propiedades antibacterianas frente a Staphylococcus aureus a base de tela no tejida de Nylon 6 y Polipropileno (PP) impregnado con extractos de Rosmarinus officinalis. Los extractos fueron obtenidos empleando etanol como disolvente extractor obteniendo porcentajes de rendimiento de 14.67 % y asistido por ultrasonido con una frecuencia de 60 kHz. En la caracterización por cromatografía líquida de alta resolución acoplado a masas se comprobó que se logró extraer familias como ácidos hidroxicinámicos, ácidos metoxicinámicos, terpenos fenólicos y catequinas. Se logró comprobar la capacidad antioxidante y antibacteriana de los extractos de Rosmarinus officinalis frente a Staphylococcus aureus y Escherichia coli. Los compósitos obtenidos se caracterizaron por espectroscopía de infrarrojo FTIR-ATR demostrando que al impregnar las telas no tejidas de Nylon 6 y PP con los extractos de Rosmarinus officinalis, se muestran las bandas correspondientes presentes en las estructuras químicas de los metabolitos secundarios de Rosmarinus officinalis, por medio de la caracterización de análisis termogravimétrico, se comprobó que los compósitos son estables a altas temperaturas y se demostró que los compósitos poseen propiedades antibacterianas frente a Staphylococcus aureus.