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Bactericidal silver ion delivery into hydrophobic coatings with surfactants

  • Short Communication
  • Published:
Journal of Industrial Microbiology & Biotechnology

Abstract

A much studied oil-soluble surfactant, bis[2-ethylhexyl]sulfosuccinate, sodium salt, was ion exchanged into the silver ion form and dissolved into microemulsions of immiscible polyurethane step monomers. Coating and curing of these microemulsions produced polyurethane coatings that exhibit bactericidal activity against representative Gram negative bacteria. After 24 h exposure, 0.006–0.012% weight Ag relative to coating weight (0.0013–0.0025 μmol Ag/cm2) results in the three-log reduction in Escherichia coli. A slightly higher level of 0.031% weight Ag relative to coating weight (0.006 μmol Ag/cm2) killed all of the E. coli after 12 h exposure. Similar results were obtained for Pseudomonas aeruginosa. Since the double-tail surfactant anion promotes reverse micelle formation in many different kinds of oils and solvents, it appears an excellent vector for incorporating low and effective amounts of silver ion into many industrial, hospital, and household coating formulations.

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Acknowledgments

The AgAOT sample was kindly prepared by Liehui Ge. This work was supported in part by a Spring/Summer Research Award to JT from Eastern Michigan University and by Army Contract No. DAAE07-03-Q from the US Army Tank and Armaments Command.

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Authors and Affiliations

  1. School of Engineering Technology, Eastern Michigan University, Ypsilanti, MI, 48197, USA

    John Texter & Paul Ziemer

  2. Department of Biology, Eastern Michigan University, Ypsilanti, MI, 48197, USA

    Steve Rhoades & Daniel Clemans

  3. 118 Sill Hall, College of Technology, Eastern Michigan University, Ypsilanti, MI, 48197, USA

    John Texter

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  1. John Texter
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  2. Paul Ziemer
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  4. Daniel Clemans
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Correspondence to John Texter.

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Texter, J., Ziemer, P., Rhoades, S. et al. Bactericidal silver ion delivery into hydrophobic coatings with surfactants. J Ind Microbiol Biotechnol 34, 571–575 (2007). https://doi.org/10.1007/s10295-007-0228-2

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  • DOI: https://doi.org/10.1007/s10295-007-0228-2

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