title: Flexible regenerated cellulose/polypyrrole composite films with enhanced dielectric properties.
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.
authors.affiliation: Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin-22, India; Federal Institute of Science and Technology, Hormis Nagar, Angamaly, Kerala, India.
authors.forename: Sreejesh Poikavila
authors.initials: SP
authors.lastname: Raghunathan
authors.affiliation: School of Chemical Sciences, MG University, Kottayam, Kerala, India.
authors.forename: Sona
authors.initials: S
authors.lastname: Narayanan
authors.affiliation: Bio-Nano Electronics Research Centre, Toyo University, Tokyo, Japan.
authors.forename: Aby Cheruvathur
authors.initials: AC
authors.lastname: Poulose
authors.affiliation: Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin-22, India. Electronic address: prsreejesh@gmail.com.
authors.forename: Rani
authors.initials: R
authors.lastname: Joseph
keywords: Conductive composite; Dielectric property; In situ polymerization; Polypyrrole; Regenerated cellulose