Scheming of microwave shielding effectiveness for X band considering functionalized MWNTs/epoxy composites

摘要

Present typescript encompasses anextraordinary electrical and mechanical behaviors of carboxylic (-COOH) functionalized multiwall carbon nanotube (MWNTs)/epoxy composites at low wt.% (0.5, 0.75, lwt.%). Functionalization on the surface of the nanotube assists MWNTs in dispersing it into epoxy polymer in a respectable manner. Fabricated composites are exposed to different characterization techniques in order to examine the overall physical properties. Microwave shielding effectiveness (SE) for X band (8-12 GHz) and the flexural properties have been premeditated to predict the electrical and mechanical performances.lt was found that the total SE of the nanocomposites was increased with the positive gradient of MWNT contents. The best result was recorded for 1 wt.% MWNT loading (SE of about 51.72 dB).In addition, incorporation of nanofillers enhanced the flexural modulus, flexural strength and micro-hardness of the resulting composites while comparing with neat epoxy. Nanocomposites with 0.75 wt.% MWNT loading demonstrated an incrementof 101% in modulus than that of neat epoxy. Theincrement in mechanical properties was due to achievement of good dispersion quality, effective bonding between MWNTs and epoxy polymer analyzed by micrographs of fracture surfaces.