3D flower-like hollow CuS@PANI microspheres with superb X-band electromagnetic wave absorption. (1st November 2022)

• Record Type: Journal Article
• Authors: Zhao, Jia; Wei, Ying; Zhang, Yi; Zhang, Qingguo
• Is Part Of: Journal of materials science & technology. Volume 126(2022)
• Page Start: 141
• Page End: 151
• Publication Date: 2022-11-01
• Subjects: Flower-like hollow CuS@PANI microspheres -- Impedance matching -- Dielectric loss -- EM wave absorption; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2022.03.016
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: Novel 3D flower-like hollow CuS@PANI micropheres have been successfully synthesized via a solvothermal process followed by in-situ polymerization. The excellent reflection loss of 3D flower-like hollow CuS@PANI micropheres is −71.1 dB with a matching thickness of 2.75 mm. The effective absorption bandwidth of 3D flower-like hollow CuS@PANI micropheres almost cover the whole X-band. Abstract: Superior electromagnetic (EM) wave absorption properties in 8.2–12.4 GHz ( X -band) can be obtained via the effective combination of polyaniline (PANI) and CuS. Herein, novel 3D flower-like hollow CuS@PANI microspheres were fabricated by a solvothermal process followed by in-situ polymerization. EM wave absorption properties of 3D flower-like hollow CuS@PANI microspheres in X -band were systematically studied, indicating the minimum reflection loss ( RL min ) of -71.1 dB and effective absorption bandwidth (EAB) covering 81% of test frequency range were achieved with a thickness of 2.75 mm. Excellent EM wave absorption properties of 3D flower-like hollow CuS@PANI microspheres were mainly ascribed to outstanding impedance matching characteristic and dielectric loss capability (conduction loss, interfacial polarization loss and dipole polarization loss). Moreover, due to the distinctive flower-like hollow structure of CuS@PANI microspheres, an additional wave-absorbing mechanism was provided by increasing the transmission paths of EM waves.