Antimicrobial high-density polyethylene (HDPE)/ZnO nanocomposites obtained by in situ polymerization
2020
Pavoski, Giovani | Kalikoski, Renan Rodrigues | Souza, Gustavo de Oliveira e | Baldisserotto, Daniel Luiz Stamm | Brum, Luis Fernando Wentz | Santos, Cristiane dos | Bergmann, Carlos Perez | Brandelli, Adriano | Jacobi, Marly Antonia Maldaner | Galland, Griselda Ligia Barrera
Nanostructured zinc oxide (ZnO) prepared by combustion in solution was used to obtain nanocomposites. The ZnO particles were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), and scanning electron microscopy (SEM), showing crystallite size of 32 nm and a superficial area of 32.6 m2 g–1. Nanocomposites with 1, 3, and 5 wt.% of ZnO in the polymeric matrix were obtained using the in situ polymerization of ethylene with catalytic activities between 1500-1700 kg (molZr h PE)–1. The high-density polyethylene nanocomposites (PEZnO) were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), SEM, and transmission electron microscopy (TEM). The nanocomposites with 1 wt.% ZnO gave excellent mechanical properties, and all were active against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria.
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