Improvement of microwave absorption properties of polyester coatings using NiFe2O4, X-doped g-C3N4 (X = S, P, and O), and MTiO3 (M = Fe, Mg, and Zn) nanofillers

Autor:	I. Hajimiri, Mohammad Hossein Rasoulifard, Seyyedeh Fatemeh Hosseini, Somayeh Solgi, Ali Reza Amani-Ghadim, Mir Saeed Seyed Dorraji
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Polyester resin chemistry.chemical_classification Solid-state chemistry Multidisciplinary Nanocomposite Materials science Scanning electron microscope Science Analytical chemistry engineering.material Polyester chemistry Coating engineering Medicine Absorption (electromagnetic radiation) Diffractometer
Zdroj:	Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
ISSN:	2045-2322
Popis:	In recent decades, to reduce electromagnetic pollution, scientists focus on finding new microwave absorbers with effective performance, thin thickness, and broad bandwidth. In this work, the nanoparticles of NiFe2O4, X-doped g-C3N4 (M = S, P, and O), and MTiO3 (M = Fe, Mg, and Zn) were successfully synthesized using co-precipitation, specific heat program, and semi-wet sol–gel methods, respectively. The synthesized nanoparticles were utilized as absorption agents and polyester resin as the matrix. Morphology, particle size, crystal structure, and chemical composition of the prepared nanocomposites were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffractometer (XRD), and energy dispersive X-Ray analysis (EDX), respectively. The microwave absorption performance of the coatings was also investigated by a vector network analyzer (VNA). Moreover, the effect of different parameters on the performance of absorbent coatings was studied by the Taguchi method and optimized to achieve an optimal absorbent. The results showed that the optimal nanocomposite has the reflectance loss (RL) less than − 30 dB (equal to absorption > 99%) at a high-frequency range (8–12 GHz) and 1 mm thickness. Furthermore, the addition of such novel nanoparticles to absorbents resulted in high values of attenuation constant (more than 200 dB/m) at the X-band. Therefore, the polyester coating filled with ZnTiO3, O-doped g-C3N4, and NiFe2O4 nanofillers can be considered a high-efficiency and low-density absorber.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99551e9df04cb3710f26674105024f68 https://doaj.org/article/f79578ea2800433397a232563a867fc0 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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