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Journal of Polymer Research
Published in: Journal of Polymer Research 12/2013

01-12-2013 | Original Paper

Investigation of polymer-coated nano silver/polyurethane nanocomposites for electromechanical applications

Authors: Q. Liu, L. Seveyrat, F. Belhora, D. Guyomar

Published in: Journal of Polymer Research | Issue 12/2013

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Abstract

Composites based on polyurethane (PU) filled with polyninylpyrrolidone (PVP)-coated silver nanoparticles were prepared for electromechanical applications. The polymer coating of the nanosilver led to a better dispersion of the fillers in the polyurethane films and higher values of dielectric permittivity. Different amounts of Ag-PVP were tested up to the percolation threshold close to 45 wt% of fillers. The dielectric, mechanical and electromechanical properties are presented and discussed. Based on laser interferometer measurements and analyses with a cross characterization device, the optimal electromechanical properties were found for the material with 20 wt% of Ag-PVP: a doubling of the dielectric permittivity was obtained as compared to pure polyurethane. In order to explain the difference between experimental and expected results and consequently to achieve a better understanding of the electromechanical behavior of these materials, various hypotheses were discussed and tested. Results pointed at a drop in dielectric permittivities under high electric fields and a decrease in crystallinity as determined by differential scanning calorimetry.
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Metadata
Title
Investigation of polymer-coated nano silver/polyurethane nanocomposites for electromechanical applications
Authors
Q. Liu
L. Seveyrat
F. Belhora
D. Guyomar
Publication date
01-12-2013
Publisher
Springer Netherlands
Published in
Journal of Polymer Research / Issue 12/2013
Print ISSN: 1022-9760
Electronic ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-013-0309-z

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