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Preparation and characterization of polyvinyl alcohol – colloidal silver nanocomposites

C. N. CASCAVAL1,* , M. CRISTEA1, D. ROSU1, C. CIOBANU1, O. PADURARU1, C. COTOFANA1

Affiliation

  1. Institute of Macromolecular Chemistry “Petru Poni”, 41A, Grigore Ghica Vodă Alley, 700487 Iaşi, Romania

Abstract

The polyvinyl alcohol (PVA)-colloidal silver (Ag) nanocomposites were prepared mixing the colloidal Ag with PVA water solution, in presence of poly(diethylene adipate lactate) diol (PDEAL), The effect of very low amounts of colloidal Ag (below 50 ppm) on the PVA matrix was investigated. The neat PVA sample and PVA-colloidal Ag nanocomposites were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and as physico-mechanical behaviour. Both TEM and SEM techniques showed that the colloidal Ag was present inside of the PVA matrix as spherical particles in the nanometer dimensions, and as clusters. Mechanical analysis via stress-strain testing, as well as the dynamic mechanical analysis (DMA) showed a substantial increase of the mechanical properties of the nanocomposite materials, against those determined for the PVA matrix..

Keywords

Nanocomposite, Colloidal Ag, PVA matrix, Nanoparticles.

Submitted at: April 6, 2007
Accepted at: July 15, 2007

Citation

C. N. CASCAVAL, M. CRISTEA, D. ROSU, C. CIOBANU, O. PADURARU, C. COTOFANA, Preparation and characterization of polyvinyl alcohol – colloidal silver nanocomposites, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2116-2120 (2007)