Photocatalytic inhibition of bacteria by TiO2 nanotubes-doped polyethylene composites

Daniela Yañez, Sichem Guerrero, Ingo Lieberwirth, María Teresa Ulloa, Tatiana Gomez, Franco M. Rabagliati, Paula A. Zapata*

*Autor correspondiente de este trabajo

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

31 Citas (Scopus)

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.
Idioma originalInglés
Páginas (desde-hasta)255-261
Número de páginas7
PublicaciónApplied Catalysis A: General
Volumen489
N.º1
DOI
EstadoPublicada - 1 ene. 2015

Nota bibliográfica

Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.

Palabras clave

  • Nanocomposites
  • Photocatalytic inhibition
  • Polyethylene
  • TiO2 nanotubes

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