Nickel nanoparticle-decorated reduced graphene oxide via one-step microwave-assisted synthesis and its lightweight and flexible composite with Polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene polymer for electromagnetic wave shielding application

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Authors	SKODA David VILCAKOVA Jarmila YADAV Raghvendra Singh HANULIKOVA Barbora CAPKOVA Tereza JURCA Marek URBANEK Michal MACHÁČ Petr ŠIMONÍKOVÁ Lucie ANTOS Jan KURITKA Ivo
Year of publication	2023
Type	Article in Periodical
Magazine / Source	Advanced Composites and Hybrid Materials
MU Faculty or unit	Faculty of Science
Citation
Web	https://link.springer.com/article/10.1007/s42114-023-00692-7
Doi	http://dx.doi.org/10.1007/s42114-023-00692-7
Keywords	Nickel; Nanoparticles; Reduced graphene oxide; Microwave synthesis; Polymer; Composite; Electromagnetic shielding
Description	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 degrees 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-block-poly(ethylene-ran-butylene)-block-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 RLmin approximate to -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 > 10 dB at a thickness of 1 mm in the whole frequency range (X-band) with reflection approximate to 50% and absorption approximate to 40% which has the potential for electromagnetic wave absorber applications.
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