• Simonikova, Lucie
• Urbanek, Michal
• Machac, Petr
• Jurca, Marek
• Yadav, Raghvendra Singh
• Skoda, David
• Vilcakova, Jarmila
• Hanulikova, Barbora
• Kuritka, Ivo
• Capkova, Tereza
• Antos, Jan

Abstract

<jats:title>Abstract</jats:title><jats:p>Nickel nanoparticle–decorated reduced graphene oxide nanocomposites (NiG) were prepared by a one-step microwave-assisted solvothermal method. The as-prepared NiG nanocomposite systems were further heated up to 800 °C under an inert atmosphere (named NiG-800) to modify their structural and electromagnetic properties. Thereafter, these developed NiG-800 nanocomposite systems of rGO and nickel nanoparticles (25 wt.%) were applied as nanofillers (50 wt.% and 70 wt.%) in a SEBS (Polystyrene-<jats:italic>block</jats:italic>-poly(ethylene-<jats:italic>ran</jats:italic>-butylene)-<jats:italic>block</jats:italic>-polystyrene) polymer matrix to create NiG-800(50)-SEBS and NiG-800(70)-SEBS nanocomposites. The addition of NiG-800 to SEBS led to an increase of Young’s modulus from 16 (SEBS) to 35 MPa (NiG-800(70)-SEBS) while the maximum elongation is still around 300%. The developed NiG-800(70)-SEBS nanocomposite exhibited high-performance electromagnetic wave absorption (minimum reflection loss RL<jats:sub>min</jats:sub> ≈ –48.2 dB at 9.29 GHz) at a low thickness of 2.3 mm in the frequency range of 8.2−12.4 GHz. The prepared NiG-800(70)-SEBS nanocomposite has the potential of an electromagnetic wave absorber. The NiG-800(70)-SEBS nanocomposite reported here has total shielding efficiency &gt; 10 dB at a thickness of 1 mm in the whole frequency range (X-band) with reflection ≈ 50% and absorption ≈ 40% which has the potential for electromagnetic wave absorber applications.</jats:p>

Topics

• nanoparticle
• nanocomposite
• impedance spectroscopy
• polymer
• nickel