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Photocatalytic inhibition of bacteria by TiO2 nanotubes-doped polyethylene composites

Paper ID Volume ID Publish Year Pages File Format Full-Text
39418 45822 2015 7 PDF Available
Title
Photocatalytic inhibition of bacteria by TiO2 nanotubes-doped polyethylene composites
Abstract

•Biocidal catalytic activity studied on PE/TiO2-Ntbs and LLDPE/TiO2-Ntbs composites.•TiO2-nanotubes doped-PE had a catalytic reduction of 36.7% with no UV after 2 h.•TiO2-nanotubes-doped LLDPE showed a reduction of 63.5% with no UV after 2 h.•TiO2-nanotubes doped-PE showed 43.1% of catalytic reduction under UV after 2 h.•TiO2-nanotubes-doped LLDPE showed 99.9% bacterial reduction under UV after 2 hrs.

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 2 h 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 60 min 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.

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Keywords
Nanocomposites; Polyethylene; TiO2 nanotubes; Photocatalytic inhibition
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Photocatalytic inhibition of bacteria by TiO2 nanotubes-doped polyethylene composites
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 489, January 2015, Pages 255–261
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us