Journal
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
Volume 31, Issue 8, Pages 1566-1574Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.21577/0103-5053.20200042
Keywords
zinc oxide; nanostructured; in situ polymerization; polyethylene; antimicrobial properties
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [302267/2017-4]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
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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 (X RD). and scanning electron microscopy (SEM), showing crystallite size of 32 nm and a superficial area of 32.6 m(2) 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 (mol(Zr)h P-E)(-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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