Scalable, superelastic, and superhydrophobic MXene/silver nanowire/melamine hybrid sponges for high-performance electromagnetic interference shielding

Wang

et al. 2023

ACS Appl. Nano Mater.

A low-load MXene nanosheet/melamine composite sponge is prepared through an impregnation-rapid freeze-drying technique, enabling the MXene nanosheets to fully unfurl and organize onto an ordered 3D network within the sponge’s skeleton. The composite sponge exhibits high electrical conductivity (121 S m–1), in addition to possessing notable lightweight characteristics. Consequently, it attains significant electromagnetic interference (EMI) shielding effectiveness, peaking at 71 dB within the X-band, and showcases an excellent infrared stealth capability. This work not only underscores the immense potential of MXene for EMI shielding but also broadens its potential applications in various fields.

mentioning

confidence: 99%

Low-Load MXene Nanosheet/Melamine Composite Sponges for Enhanced Electromagnetic Interference Shielding

Wang

et al. 2023

ACS Appl. Nano Mater.

“…The thickness and density both have an important impact on EMI shielding materials. Therefore, specific EMI shielding effectiveness (SSE/t, SE divided by density and thickness) is often used as a standard to analyze the EMI shielding ability of a material [ 50 ]. In cross section, the EMI SSE/t values of WC-1000 samples (balsa wood, basswood and beech) are 550.6 dB cm 2 g −1 , 557.6 dB cm 2 g −1 and 400.4 dB cm 2 g −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

High Value Utilization of Waste Wood toward Porous and Lightweight Carbon Monolith with EMI Shielding, Heat Insulation and Mechanical Properties

Han

et al. 2023

Molecules

With the increasing pollution of electromagnetic (EM) radiation, it is necessary to develop low-cost, renewable electromagnetic interference (EMI) shielding materials. Herein, wood-derived carbon (WC) materials for EMI shielding are prepared by one-step carbonization of renewable wood. With the increase in carbonization temperature, the conductivity and EMI performance of WC increase gradually. At the same carbonization temperature, the denser WC has better conductivity and higher EMI performance. In addition, due to the layered superimposed conductive channel structure, the WC in the vertical-section shows better EMI shielding performance than that in the cross-section. After excluding the influence of thickness and density, the specific EMI shielding effectiveness (SSE/t) value can be calculated to further optimize tree species. We further discuss the mechanism of the influence of the microstructure of WC on its EMI shielding properties. In addition, the lightweight WC EMI material also has good hydrophobicity and heat insulation properties, as well as good mechanical properties.

“…As a result, the integration of three properties, superhydrophobicity, thermal insulation and adhesion offer many promising applications in building, electrical devices, and transportation. Also reported by Wang et al., the introduction of superhydrophobicity to the MXene/silver nanowire/melamine hybrid sponge could increase the material stability and water repellency, allowing the system to perform in complex environment [149] …”

Section: Special Superhydrophobicitymentioning

confidence: 89%

“…Also reported by Wang et al, the introduction of superhydrophobicity to the MXene/silver nanowire/melamine hybrid sponge could increase the material stability and water repellency, allowing the system to perform in complex environment. [149]…”

Section: Integrated Superhydrophobic Surface For Various Applicationsmentioning

confidence: 99%

Surface Modification, Topographic Design and Applications of Superhydrophobic Systems

Zhao

Wang

Han

et al. 2022

Chemistry A European J

Superhydrophobic surfaces with expanded wetting behaviors, like tunable adhesion, hybrid surface hydrophobicity and smart hydrophobic switching have attracted increasing attention due to their broad applications. Herein, the construction methods, mechanisms and advanced applications of special superhydrophobicity are reviewed, and hydro/superhydrophobic modifications are categorized and discussed based on their surface chemistry, and topographic design. The formation and maintenance of special superhydrophobicity in the metastable state are also examined and explored. In addition, particular attention is paid to the use of special wettability in various applications, such as membrane distillation, droplet‐based electricity generators and anti‐fogging surfaces. Finally, the challenges for practical applications and future research directions are discussed.