MICROWAVE SHIELDING, DIELECTRIC AND MAGNETIC BEHAVIOUR OF MWCNT/Fe3O4 PRO-HYBRID NANO OXIDES REINFORCED NATURAL RUBBER COMPOSITE IN E, F, I & J BAND FREQUENCIES

摘要

In this research work a flexible shielding material for blocking microwaves with variable frequencies. The principal aim of this work is to improve the microwave shielding behaviour of natural rubber by reinforcing compound form of MWCNT and magnetite pro-hybrid nano particles. Compound form of nano particles have produced by ball milling method. The particles morphology has been analyzed using HRTEM. The particles dispersion morphology in matrix was revelled by SEM analysis. The natural rubber composites have been prepared by two roll mill method with varying particles volume percentages of 5, 10 &15. The magnetic properties were studied with VSM whereas the microwave shielding behaviour was analysed using typical microwave test bench. The magnetization of 15vol.% of compound particles reinforced natural rubber composite shows 587E-6. Maximum microwave attenuation of 64dB was observed for 15vol.% of particles reinforced natural rubber composite in J band frequency.