Solvent-crazed PET fibers imparting antibacterial activity by release of Zn2+
✍ Scribed by Oliver Weichold; Pooja Goel; Karl-Heinz Lehmann; Martin Möller
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 352 KB
- Volume
- 112
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Abstract
Poly(ethylene terephthalate) fibers containing zinc chloride in the fiber bulk were prepared by solvent crazing. Fibers containing 6 g/Kg and 13 g/Kg Zn^2+^ were investigated. SEM‐EDX analyses and the formation of the pink bis(1,5‐dithiocarbazonato‐N,S) complex inside the fibers confirm the presence of zinc. UV‐Vis spectroscopy indicates a slow release of zinc ions into the aqueous media and, thus, the fibers serve as a release system to inhibit the growth of Escherichia coli during the first exposure. Thermal annealing of the freshly prepared fibers above T~g~ was shown to modify the release profile so that bacterial growth was also inhibited during repetitive and prolonged exposures. The washing fastness is fair and after 10 washing cycles, ∼ 30% of the original zinc content still remains in the fiber. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009