Synthesis and characterization of triple layer nanostructure for microwave absorption in the Ku frequency range

In this research (PANI/CNT) core/shell nanocomposite were synthesized via in situ chemical oxidative seeding polymerization‚ the results of SEM indicated the structure of synthesized nanocomposite. TEM‚ FTIR‚ UV-Vis‚ XRD analyses of samples showed that this nanocomposite is decorated with (Ni‚ Co) oxide nanoparticles. The VSM test of as prepared and annealed nanocomposite exhibited the saturated magnetization of 0.93‚ 1.96 emu/g, respectively; the coercivity values were also 26.5‚ 1200 Oe, respectively. The reflection loss characteristics of (Ni‚ Co) oxide- Pani- CNT core/shell nanocomposite were also investigated with a vector network analyzer‚ in the 12.4–18 GHz range (Ku band). The maximum absorption increases with enhancement of the dispersed nanoparticles percent in polyurethane matrix from 1 to 10%. The value of the maximum reflection loss in the absorption samples with 1% and 10% of nanoparticles is -3.84 dB at 15.80 GHz and -7.3 dB at 17.5 GHZ, respectively.