Synthesis and characterization of Polyvinyl Alcohol-Polypyrrole-Silver nanocomposite polymer films

Document Type : Reasearch Paper

Authors

• Dattatray Nerkar ¹
• Madhav Rajwade ¹
• Suryakant Jaware ¹
• Milind Jog ²

¹ Department of Physics, Sathaye College, Dixit Road, Vile Parle (East), Mumbai 400057, India.

² Kirti M. Doongursee College, Dadar (West), Mumbai 400028, India.

Abstract

The present paper describes the preparation and characterization of Polyvinyl Alcohol-Polypyrrole-Silver Nanocomposite (PVA-PPy-Ag NC) films. The prepared films were conducting, freestanding, flexible, and robust. Silver nanoparticles (Ag NPs) were synthesized from an aqueous solution of silver nitrate using trisodium citrate as a reductant. The casting solution for the films was prepared by in-situ chemical oxidative polymerization of pyrrole. This was done in the presence of Polyvinyl Alcohol and suspension of pre-synthesized silver nanoparticles. The absorption band at 424 nm in UV-Visible Spectroscopy of silver nanoparticles confirmed the formation of Ag nanoparticles. Scanning Electron Microscopy (SEM) studies revealed that spherical Ag NPs were produced with an average size of ~ 25 nm. The morphological analysis of the synthesized PVA-PPy-Ag nanocomposite films was carried out using Transmission Electron Microscopy (TEM). It was observed in the TEM images that Ag nanoparticles were well dispersed and conjugated in the PVA-PPy matrix. The structure of the produced films was studied by Fourier transform infrared (FTIR) Spectroscopy and X-Ray Diffraction (XRD). X-ray diffraction analysis exhibited the crystalline nature of the silver nanoparticles with a face-centered cubic (fcc) structure. The synthesized PVA-PPy-Ag nanocomposite films can be further utilized as potential material for the fabrication of gas sensors.

Keywords

• Freestanding Films
• Nanocomposites
• Polypyrrole
• PVA
• Silver Nanoparticles

20.1001.1.20088868.2020.11.3.1.3

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