The Influence of nanosilver on thermal and antibacterial properties of a two component 100% solid polyurethane coating

Document Type : Research Article

Authors

1 Environmental Research Group, Institude for color science and technology, Tehran

2 Department of polymer engineering, Sahand University of Technology, Tabriz/ Institude of polymeric materials, Sahand University of Technology, Tabriz

3 Printing science and Technology Group, Institude for Color science and technology, Tehran

/amnc.2013.1.4.2

Abstract

A two-component 100% solid polyurethane coating containing nanosilver (200 ppm) was prepared and compared to the blank coating without any nanosilver. The coatings were inoculated with E.coli and S.aureus by the agar-well diffusion method. According to the results, silver nanocomposite coating exhibited a growth reduction on both types of bacteria. The cross-section of samples was examined by scanning electron microscopy (SEM). The micrographs depicted uniform dispersion of silver nanoparticles in the polyurethane matrix. Fourier transform infra-red (FT-IR) spectra of the coatings revealed no obvious affection of nanosilver on chemical bonding in polyurethane matrix. In addition, enhancement of thermal properties was observed by differential scanning calorimetry and thermogravimetry.

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