Functionalization of dielectric BaTiO3 and semiconducting ZnO nanoparticles on rGO layers and their polymer composites: Applications in EMI shielding
G.P. Abhilash, Kumari Sushmita, Suryasarathi Bose, C. Shivakumara
Abstract
Due to the continuous need for electronic devices across various industries, electromagnetic interference (EMI) is a significant problem in contemporary civilization. Materials with properties like lightweight, ease of processing, non-corrosiveness, design flexibility, and compatibility with existing technologies are in the spotlight to handle this problem. In this article, we have synthesized rGO-BaTiO 3 by surface hydroxylation of dielectric BaTiO 3 with graphene oxide (GO), and rGO-ZnO by in-situ reduction with GO and zinc nitrate. Phase purity, functional group analysis and morphological properties are studied by using PXRD , FTIR, SEM-EDX, and TEM. Polymer composites are prepared using acrylonitrile butadiene styrene (ABS) polymer with nanofillers rGO-BaTiO 3 and rGO-ZnO with multiwall carbon nanotube (MWCNT). Total Shielding Effectiveness (SE T ) was measured by varying the weight ratio and thickness of the shield. The rGO-BaTiO 3 composite with 10 wt% for 3 mm thickness shows a SE T of 40.5 dB in X-band and maximum SE T obtained is 59.8 dB at 11.8 GHz. In the case of rGO-ZnO composites shows 45.1 dB and maximum SE T observed is 57.9 dB at 9.6 GHz. The data results obtained are envisaged to prove their potential in electronic appliances, electromagnetic countermeasures, and stealth materials.