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Antimicrobial activities of hydrophilic polyurethane/titanium dioxide complex film under visible light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
29069 44118 2008 7 PDF Available
Title
Antimicrobial activities of hydrophilic polyurethane/titanium dioxide complex film under visible light irradiation
Abstract

Using the polyurethane (PU) resin modified by anion surfactant, the hydrophilic polyurethane/titanium dioxide (TiO2) complex film (HPTF) was prepared. The characteristics of the HPTF were described by Fourier-transform infrared spectrometry (FT-IR), ultraviolet–visible spectroscopy (UV–vis) and standard measurements of mechanical properties. Simultaneously, the antimicrobial activities of the HPTF were also studied. The results indicated that, after 8 h, nearly all of the Escherichia coli (E. coli) and Candida albicans (C. albicans) could be killed under visible light irradiation; the antimicrobial activity was evidently better than pristine polyurethane film. The antimicrobial ratio of the latter was less than 40% under the same conditions. The optimal TiO2 amount in the HPTF preparation was 0.25 g (TiO2)/100 mL (emulsion). The antimicrobial activity of the HPTF under visible light was in accordance with the UV–vis absorption spectra, in which strong absorption extended over the visible light spectra region. The combination of the dodecyl sulfonate group and titanium dioxide with polyurethane was found via FT-IR.

Keywords
Hydrophilic; Polyurethane; Nano-TiO2; Antimicrobial; Visible light
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Antimicrobial activities of hydrophilic polyurethane/titanium dioxide complex film under visible light irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 199, Issues 2–3, 25 September 2008, Pages 123–129
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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