Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 31, Issue 6, Pages 563-567Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200900791
Keywords
biomaterials; fillers; nanocomposites; nanoparticles
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Funding
- CONICYT [FONDECYT INICIACION EN INVESTIGACION 11075001, PSD53, FONDAP 11980002]
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A set of poly(propylene) composites containing different amounts of copper nanoparticles (CNP) were prepared by the melt mixed method and their antimicrobial behavior was quantitatively studied. The time needed to reduce the bacteria to 50% dropped to half with only 1 v/v % of CNP, compared to the polymer without CNP. After 4h, this composite killed more than 99.9% of the bacteria. The biocide kinetics can be controlled by the nanofiller content; composites with CNP concentrations higher than 10 v/v % eliminated 99% of the bacteria in less than 2 h. X-ray photoelectron spectroscopy did not detect CNP at the surface, therefore the biocide behavior was attributed to copper in the bulk of the composite.
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