Photocatalytic inhibition of bacteria by TiO2 nanotubes-doped polyethylene composites
Autor
Yañez D.
Guerrero S.
Lieberwirth I.
Ulloa M.T.
Gomez T.
Rabagliati F.M.
Zapata P.A.
Resumen
Polyethylene (PE) and polyethylene-octadecene (LLDPE) composites containing titanium dioxide nanotubes were synthesized and applied to the inhibition of selected bacteria. It was found that polymerization rate of the polymerizations increased with the incorporation of the octadecene compared with bare ethylene, while with modified nanotubes (O-TiO2-Ntbs) the catalytic activity showed a slight decrease compared with the pure polymer. Regarding physical properties, the melting temperature and cristallinity of PE was higher than LLDPE. LLDPE presented lower rigidity than PE and thus lower Young's modulus. On the other hand, with the incorporation of nanotubes, Young's modulus did not change significantly with respect to PE. After 2h of contact, the PE/O-TiO2-Ntbs composite showed a reduction of Escherichia coli of 36.7% under no UVA irradiations. In contrast, LLDPE/O-TiO2-Ntbs showed 63.5%. The photocatalytic reduction (under UVA light) was much higher and after 60min the LLDPE/O-TiO2-Ntbs composites showed a bacterial reduction of 99.9%, whereas the PE/O-TiO2-Ntbs showed 42.6% of catalytic reduction. © 2014 Elsevier B.V. All rights reserved.
Colecciones
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
Article
Mechanical and antimicrobial polyethylene composites with CaO nanoparticles (2020)
Silva, Cristián; Bobillier, Felipe; Canales, Daniel A.; Sepúlveda, Francesca; Cament, Alejandro; Amigó, Nicolás; Rivas, Lina María; Ulloa, María Teresa; Reyes-Contreras, Pablo; Ortiz, J. Andrés; ... (MDPI AG, 2020-09-18)Low-density polyethylene composites containing different sizes of calcium oxide (CaO) nanoparticles were obtained by melt mixing. The CaO nanoparticles were synthesized by either the sol-gel or sonication methods, obtaining ... -
Article
Solid State Tuning of TiO2 Morphology, Crystal Phase, and Size through Metal Macromolecular Complexes and Its Significance in the Photocatalytic Response (2020)
Allende-González P.; Laguna-Bercero M.Á.; Barrientos L.; Valenzuela M.L.; Díaz C. (American Chemical Society, 2018) -
Article
Comparative study of the anchorage and the catalytic properties of nanoporous TiO2 films modified with ruthenium (II) and rhenium (I) carbonyl complexes (2020)
Oyarzún D.P.; Chardon-Noblat S.; Linarez Pérez O.E.; López Teijelo M.; Zúñiga C.; Zarate X.; Shott E.; Carreño A.; Arratia-Perez R. (Elsevier B.V., 2018)