Kavitha, N and Chandramohan, A and Sharma, D and Dinakaran, K (2022) Synthesis and microwave absorption studies on 2D graphitic carbon nitride loaded polyaniline/polyvinyl alcohol nanocomposites. In: High Performance Polymers .
Full text not available from this repository.Abstract
A light weight electromagnetic interference (EMI) shielding and microwave absorbing composite films has been developed by loading varying weight content of graphitic carbon nitride (g-C3N4) nanosheets and polyaniline (PANI) into polyvinyl alcohol (PVA) matrix. The prepared PVA/PANI/g-C3N4 (1%, 3%, 5%) composites has been subjected to FTIR, X-Ray powder diffraction, SEM, Thermal studies, Dielectric studies and electromagnetic shielding effectiveness (EMI SE) analysis. The PVA/PANI/g-C3N4 (1%, 3%, 5%) composites was discovered to have improved electrical conductivity, dielectric loss, and dielectric constant. It is observed from the SEM images that the sheet layers of g-C3N4 are wrapped by the polymer matrix and the morphology to PVA/PANI composite in the g-C3N4 indicates homogeneous blending of PVA/PANI without any phase separation and has porous in it. The PANI/g-C3N4 fractured surfaces present are smooth but irregular in appearance indicating good compatibility between the PVA and PANI matrices. The dielectric properties was found to increase on increasing the concentration of the g-C3N4 nanofiller and reached a maximum of 9.8 × 106 at 1 MHz for 3% g-C3N4 in PVA/PANI. The incorporation of g-C3N4 into PVA/PANI enhanced the conductivity and the 5% g-C3N4 loaded composite film exhibited a conductivity value of 0.043 S/cm at 1 MHz. The PVA/PANI/g-C3N4 (1%, 3%, 5%) composites exhibited potential EMI SE values ranging from 24 to 35 dB at 8.6 GHz and from 42 to 63 dB at 12.4 GHz, for instance the PVA/PANI/g-C3N4 5% composite showed highest value of 63 dB at 12.4 GHz. The PVA/PANI/g-C3N4 5% exhibits the maximum highest reflection loss 8 GHz–12 GHz in which the higher absorption of −36 dB is observed at 10.3 GHz of the X-band region.
| Item Type: | Journal Article |
|---|---|
| Publication: | High Performance Polymers |
| Publisher: | SAGE Publications Ltd |
| Additional Information: | The copyright for this article belongs to SAGE Publications Ltd. |
| Keywords: | Dielectric losses; Dielectric properties of solids; Electromagnetic shielding; Electromagnetic wave interference; Nanocomposite films; Nanocomposites; Nitrides; Phase separation; Polyaniline; Polymer matrix composites; Polyvinyl alcohols; Signal interference; X ray powder diffraction, Dielectric studies; Electromagnetic interference shielding; Graphitic carbon nitrides; Light weight; matrix; Microwave absorbing composites; Microwave absorption; Polymer nanocomposite; Polymer-nanocomposite; Polyvinylalcohol, Electromagnetic pulse |
| Department/Centre: | Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 09 Nov 2022 09:05 |
| Last Modified: | 09 Nov 2022 09:05 |
| URI: | https://eprints.iisc.ac.in/id/eprint/77833 |
Actions (login required)
 |
View Item |
