In order to improve the comprehensive electromagnetic protection and meet the aerospace demands, designing the microstructure of functional nanomaterials is an effective strategy. Inspired by the special structure of the ball-cactus, in this work, soft-magnetic nanohybrid materials are realized for highly efficient electromagnetic protection. Layered double FeNi3 hydroxide (LDH) is in-situ nucleated and grown on the surface of MXene via synchronous electrostatic self-assembling, leading to an intermediate product - LDH@MXene - with a hydrangea microstructure (diameter ∼5 μm). LDH@MXene is subsequently annealed at 500 °C to obtain a hollow ball-cactus-like LDH@MXeneHT500 nanohybrid, by transforming the lamellar “petals” of the hydrangea structure into burr-like structures. LDH@MXeneHT500 has soft-magnetic characteristics, facilitating the transport of induced charges and the consumption of electromagnetic energy. Therefore, LDH@MXeneHT500 nanohybrid exhibits excellent comprehensive electromagnetic protection capabilities, such as high reflection loss (RLmin = −76.1 dB) in a wide absorption bandwidth (EAB = 6.12 GHz), and high electromagnetic interference shielding efficiency (EMI SE = 47.2 dB in X band). To broaden its application, poly(dimethylsiloxane) (PDMS)/LDH@MXeneHT500 nanocomposites are further prepared that exhibit improved mechanical strength (9.48 MPa) and highly efficient electromagnetic protection performances (RLmin = −65.11 dB and EAB = 7.64 GHz, EMI SE > 50 dB in 3–18 GHz). Therefore, both the LDH@MXeneHT500 nanohybrid materials and PDMS/LDH@MXeneHT500 nanocomposites show great potential in electromagnetic protection applications, such as in the area of aerospace and satellite communication.
Advanced hollow ball-cactus-like soft-magnetic LDH@MXeneHT nanohybrid materials towards highly efficient electromagnetic protection
Puglia, Debora;
2025
Abstract
In order to improve the comprehensive electromagnetic protection and meet the aerospace demands, designing the microstructure of functional nanomaterials is an effective strategy. Inspired by the special structure of the ball-cactus, in this work, soft-magnetic nanohybrid materials are realized for highly efficient electromagnetic protection. Layered double FeNi3 hydroxide (LDH) is in-situ nucleated and grown on the surface of MXene via synchronous electrostatic self-assembling, leading to an intermediate product - LDH@MXene - with a hydrangea microstructure (diameter ∼5 μm). LDH@MXene is subsequently annealed at 500 °C to obtain a hollow ball-cactus-like LDH@MXeneHT500 nanohybrid, by transforming the lamellar “petals” of the hydrangea structure into burr-like structures. LDH@MXeneHT500 has soft-magnetic characteristics, facilitating the transport of induced charges and the consumption of electromagnetic energy. Therefore, LDH@MXeneHT500 nanohybrid exhibits excellent comprehensive electromagnetic protection capabilities, such as high reflection loss (RLmin = −76.1 dB) in a wide absorption bandwidth (EAB = 6.12 GHz), and high electromagnetic interference shielding efficiency (EMI SE = 47.2 dB in X band). To broaden its application, poly(dimethylsiloxane) (PDMS)/LDH@MXeneHT500 nanocomposites are further prepared that exhibit improved mechanical strength (9.48 MPa) and highly efficient electromagnetic protection performances (RLmin = −65.11 dB and EAB = 7.64 GHz, EMI SE > 50 dB in 3–18 GHz). Therefore, both the LDH@MXeneHT500 nanohybrid materials and PDMS/LDH@MXeneHT500 nanocomposites show great potential in electromagnetic protection applications, such as in the area of aerospace and satellite communication.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
