Journal of Materials Science

, Volume 42, Issue 15, pp 6067–6073 | Cite as

Long-term antimicrobial polyamide 6/silver-nanocomposites

  • Cornelia DammEmail author
  • Helmut Münstedt
  • Alfons Rösch


Elemental silver nanoparticles were generated in polyamide 6 (PA6) by the thermal reduction of silver ions during the melt processing of a PA6/silver acetate mixture. The silver ion release from PA6 filled with 2 wt% nanosilver obeys a zero-order rate law for at least 100 days. During this time about 17 μg silver per day, per litre immersion liquid and per cm2 sample surface are released. The PA6/Ag-nanocomposite was shown to be active against Escherichia coli whereas the pure PA6 did not show any antimicrobial efficacy. Immersion of a nanocomposite containing 2 wt% silver in water for 100 days does not reduce its antimicrobial efficacy against Escherichia coli. Thus PA6 filled with 2 wt% nanosilver is an effective antimicrobial material for long-term applications.


Silver Nanoparticles Immersion Time Silver Particle Antimicrobial Efficacy Immersion Liquid 



The authors are grateful for financial support from the German Research Foundation (DFG). Many thanks to Dr. E. Ingolic and Dr. H. Schröttner from the Research Center of Electron Microscopy in Graz (Austria) for performing TEM investigations.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Cornelia Damm
    • 1
    Email author
  • Helmut Münstedt
    • 1
  • Alfons Rösch
    • 2
  1. 1.Friedrich-Alexander-University Erlangen-Nuremberg, Institute of Polymer MaterialsErlangenGermany
  2. 2.Friedrich-Alexander-University Erlangen-Nuremberg, Institute of MicrobiologyErlangenGermany

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