| Autor: |
Cajero-Zul LR; a Departamento de Ingeniería Química , Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias , Guadalajara , México., López-Dellamary FA; b Departamento de Madera Celulosa y Papel , Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias. Carretera a Nogales , Zapopan , México., Gómez-Salazar S; a Departamento de Ingeniería Química , Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias , Guadalajara , México., Vázquez-Lepe M; c Departamento de Ingeniería de Proyectos , Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias , Zapopan , México., Vera-Graziano R; d Instituto de Investigaciones en Materiales , Universidad Nacional Autónoma de México , CDMX , México., Torres-Vitela MR; e Departamento de Farmacobiología , Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias , Guadalajara , México., Olea-Rodríguez MA; e Departamento de Farmacobiología , Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias , Guadalajara , México., Nuño-Donlucas SM; a Departamento de Ingeniería Química , Universidad de Guadalajara, Centro Universitario de Ciencias Exactas e Ingenierias , Guadalajara , México. |
| Abstrakt: |
Nanocomposites of functionalized carbon nanotubes (CNTs f ) as nanofillers, and a copolymer of star-shaped poly(ε-caprolactone) (stPCL) and poly(ethylene glycol) (PEG) as a polymeric matrix were synthesized, characterized, and their resistance to the growth of Staphylococcus aureus and Pseudomonas aeruginosa was evaluated. CNTs f contain hydroxyl, carboxyl and acyl chloride groups attached to their surface. Nanocomposites were prepared by mixing CNTs f to a solution of stPCL-PEG copolymer. Raman and FT-IR spectroscopies confirm the functionalization of carbon nanotubes (CNTs). Star-shaped PCL-PEG copolymer was characterized by Gel permeation chromatography (GPC), and 1 H-NMR and 13 C-NMR spectroscopies. X-ray photoelectron spectroscopy (XPS) shows that CNTs f are grafted to the stPCL-PEG copolymer. Crystallization behavior of the nanocomposites depends on the amount of CNTs f used in their preparation, detecting nucleation (nanocomposites prepared with 0.5 wt.% of CNTs f ) or anti-nucleation (nanocomposites prepared with 1.0 wt.% of CNTs f ) effects. Young's Moduli and thermal stability of nanocomposites were higher, but their resistence to the proliferation of Staphylococcus aureus and Pseudomonas aeruginosa was lower than the observed for their pure polymer matrix. |
