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Polyurethane biocidal polymeric surface modifiers

delete2006-03-01
delete146
PRE
AI
Ü
Ümit Makal
L
Lynn F. Wood
D
Dennis E. Ohman
K
Kenneth J. Wynne
DOI：10.1016/j.biomaterials.2005.08.038delete
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Abstract

Abstract

En 中文
Polyurethanes (PUs) with soft blocks containing semifluorinated (-CH2OCH2CF3) and 5,5-dimethylhydantoin pendant groups were prepared and employed (2wt%) as biocidal polymeric surface modifiers (PSMs) for a conventional PU coating comprised of an isophorone diisocyanate/1,4-butanediol-derived hard block (50%) and poly(tetramethylene oxide) soft block. Surface enrichment of the PSM was verified by dynamic contact angle measurements. The PSM modified PU was activated by converting near-surface amide groups to chloramide with 3wt% hypochlorite. The conversion of near-surface amide to chloramide is reflected in somewhat increased hydrophobic character for the antimicrobial chloramide functionalized surfaces. Biocidal activity against both Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa, and Escherichia coli) bacteria was demonstrated by using a modified version of American Association of Textile Chemists and Colorists (AATCC-100) test. By changing the PSM concentration it was found that only 1.6wt% PSM (0.66wt% biocide, 5,5-dimethylhydantoin) in a conventional PU affected complete kill of P. aeruginosa in 15min by using this biocidal testing protocol. (c) 2005 Elsevier Ltd. All rights reserved.
Keywords:
antimicrobial
contact angle
polyurethane
surface modification

Journal

Biomaterials cover
Biomaterials
IF:
12.9
Papers:
1.9W
Citations:
10.8W

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Cited Papers

Cited Papers

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