Abstract
Graphite Oxide (GO) was prepared from graphite powder by Hummer’s method. GO was characterized by X-ray diffraction analysis and Scanning electron microscopy. Frequency dependence of dielectric constant (ε′), dielectric loss tangent (tanδ), a.c. conductivity (σac) and Electromagnetic Interference (EMI) shielding effectiveness (SE) studies have been undertaken on GO blended with polyvinyl alcohol (PVA) in the frequency region 50Hz-5MHz at room temperature. Dielectric properties such as ε′ and tanδ are found to decrease with increase in the frequency. GO/PVA nanocomposites are found to possess exceptionally high dielectric constants of over 10000 below 100Hz. The a.c. conductivity of GO/PVA nanocomposites was found to increase with an increase in the frequency. The SE is found to decrease with an increase in the frequency, exhibiting maximum value 38.87 dB of SE at 50Hz. The highly dielectric GO/PVA nanocomposites were demonstrated a favorable efficient lightweight material for the absorbing of electromagnetic waves at low frequencies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
