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Updated: Mar 10, 2026
Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
Flexible regenerated cellulose/polypyrrole composite films with enhanced dielectric properties
Sreejesh Poikavila Raghunathan1, Sona Narayanan2, Aby Cheruvathur Poulose3
1Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin-22, India; Federal Institute of Science and Technology, Hormis Nagar, Angamaly, Kerala, India.
Abstract:
Flexible regenerated cellulose/polypyrrole (RC-PPy) conductive composite films were prepared by insitu polymerization of pyrrole on regenerated cellulose (RC) matrix using ammonium persulphate as oxidant. FTIR, XPS and XRD analysis of RC-PPy composite films revealed strong interaction between polypyrrole (PPy) and RC matrix. XRD results indicated that crystalline structure of RC matrix remains intact even after composite formation. SEM micrographs revealed the formation of a continuous conductive network of PPy particles in the RC matrix, leading to significant improvement in electrical and dielectric properties. The electrical conductivity of RC-PPy composites with 12wt% of PPy was 3.2×10-5S/cm, which is approximately seven fold higher than that of RC. Composites showed high dielectric constant and low dielectric loss values, which is essential in capacitor application.
