A Theoretical Investigation of the Electrical and Dielectric Properties of PDMS‐CNT

• Published in: Macromolecular theory and simulations 2024-05, Vol.33 (3), p.n/a
• Main Authors: Karuppiah, Poovendran, Nambi Ramachary, Ramanujam, Kulandai Samy, Joseph Wilson, Vadivel Murugan, Prasanna Venkatesh
• Format: Article
• Language: English
• Subjects: carbon nanotube; Carbon nanotubes; Cole–Cole; Dielectric constant; Dielectric properties; Dielectric relaxation; dielectrics; electrical conductivity; Electrical properties; Permittivity; Polydimethylsiloxane; Relaxation time
• ISSN: 1022-1344; 1521-3919
• DOI: 10.1002/mats.202300062

In the present study, the dielectric and electrical properties of the carbon nanotube/polydimethylsiloxane (CNT/PDMS) composite are theoretically analyzed for various doping concentrations. For both single‐walled and multiwalled CNTs (SCNTs and MCNTs), the work is done between 75 and 750 THz. The behavior of the dielectric constant, loss factor, and conductivity are analyzed as functions of frequency. It is observed that there is no appreciable change in the real part of the dielectric constant at high frequencies in single‐walled CNT. The loss tangent is high at lower frequencies, and the loss peak is observed at a particular frequency. The Cole–Cole plot is used to interpret the static‐ and high‐frequency dielectric constants and relaxation time of the composite. With increasing concentrations of SCNT and MCNT, the conductivity at the obtained peak maximum shifts to a lower frequency. The work emphasizes the theoretical analysis of the dielectric and electrical properties of carbon nanotube/polydimethylsiloxane composites for various concentrations of carbon nanotubes. It analyzes the behavior of the dielectric constant, loss tangent, and conductivity as functions of frequency. It interprets the static‐ and high‐frequency dielectric constants and relaxation time of the composites by the Cole–Cole plot.