Lightweight, and Robust Cobalt Ferrite/Carbon Nanotubes/Waterborne Polyurethane Hybrid Aerogels for Efficient Microwave Absorption and Thermal Insulation

2021 ◽  
Author(s):  
jiawei Luo ◽  
Yu Wang ◽  
zhongji Qu ◽  
Wei Wang ◽  
Dan Yu
Keyword(s):  
Mechanical Property ◽  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Thermal Insulation ◽  
Cobalt Ferrite ◽  
Waterborne Polyurethane ◽  
Hybrid Aerogels ◽  
Effective Integration

Lightweight and efficient microwave absorption materials with excellent heat-insulating ability and mechanical property are highly attractive in real applications, but the effective integration of these functions into one material by...

Position Selective Dielectric Polarization Enhancement in CNTs Based Heterostructures for High-Efficient Microwave Absorbing

Nanoscale ◽  
2021 ◽  
Author(s):  
Haihua Hu ◽  
Yun Zheng ◽  
Kun Ren ◽  
Jieying Wang ◽  
Yanhui Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Dielectric Polarization ◽  
High Efficient ◽  
Microwave Absorbing

Constructing carbon nanotubes (CNTs) based on heterostructures have been proved to be an effective way to improve microwave absorption (MA) capability of the materials, regardless of the inner wall or...

scholarly journals Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Weihua Gu ◽  
Jiaqi Sheng ◽  
Qianqian Huang ◽  
Gehuan Wang ◽  
Jiabin Chen ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Thermal Insulation ◽  
Freeze Drying ◽  
Thermal Infrared ◽  
Carbon Aerogel ◽  
Carbon Aerogels ◽  
List Type ◽  
Drying Method ◽  
Cross Sectional ◽  
Compression Resistance

Highlights The eco-friendly shaddock peel-derived carbon aerogels were prepared by a freeze-drying method. Multiple functions such as thermal insulation, compression resistance and microwave absorption can be integrated into one material-carbon aerogel. Novel computer simulation technology strategy was selected to simulate significant radar cross-sectional reduction values under real far field condition. . Abstract Eco-friendly electromagnetic wave absorbing materials with excellent thermal infrared stealth property, heat-insulating ability and compression resistance are highly attractive in practical applications. Meeting the aforesaid requirements simultaneously is a formidable challenge. Herein, ultra-light carbon aerogels were fabricated via fresh shaddock peel by facile freeze-drying method and calcination process, forming porous network architecture. With the heating platform temperature of 70 °C, the upper surface temperatures of the as-prepared carbon aerogel present a slow upward trend. The color of the sample surface in thermal infrared images is similar to that of the surroundings. With the maximum compressive stress of 2.435 kPa, the carbon aerogels can provide favorable endurance. The shaddock peel-based carbon aerogels possess the minimum reflection loss value (RLmin) of − 29.50 dB in X band. Meanwhile, the effective absorption bandwidth covers 5.80 GHz at a relatively thin thickness of only 1.7 mm. With the detection theta of 0°, the maximum radar cross-sectional (RCS) reduction values of 16.28 dB m2 can be achieved. Theoretical simulations of RCS have aroused extensive interest owing to their ingenious design and time-saving feature. This work paves the way for preparing multi-functional microwave absorbers derived from biomass raw materials under the guidance of RCS simulations.

Preparation of Electrodeposited Ni-CNTs Nanocomposite Coatings with Highly Wear and Corrosion Resistance Properties

2012 ◽  
Vol 548 ◽  
pp. 101-104 ◽  
Author(s):  
W. Shao ◽  
D. Nabb ◽  
N. Renevier ◽  
I. Sherrington ◽  
J.K. Luo
Keyword(s):  
Mechanical Property ◽  
Carbon Nanotubes ◽  
Corrosion Resistance ◽  
Surface Morphology ◽  
Corrosion Property ◽  
Nanocomposite Coatings ◽  
Sem Images ◽  
Wear And Corrosion ◽  
Watts Bath ◽  
Wear And Corrosion Resistance

Ni-carbon nanotubes nanocomposite coatings were obtained from a Watts bath containing uniformly dispersed carbon nanotubes (CNTs). The surface morphology was investigated by the SEM images of coatings. The mechanical property and corrosion resistance of the nanocomposite coatings were investigated. This study revealed these CNTs reinforced Ni nanocoatings have improved mechanical and corrosion property.

scholarly journals Controllable permittivity in 3D Fe3O4/CNTs network for remarkable microwave absorption performances

RSC Advances ◽  
2017 ◽  
Vol 7 (43) ◽  
pp. 26801-26808 ◽  
Author(s):  
Lingyu Zhu ◽  
Xiaojun Zeng ◽  
Meng Chen ◽  
Ronghai Yu
Keyword(s):  
Carbon Nanotubes ◽  
Microwave Absorption ◽  
Effective Bandwidth ◽  
Three Dimension ◽  
Porous Spheres

Fe3O4 porous spheres are anchored onto carbon nanotubes (CNTs) to form three-dimension Fe3O4/CNTs nanocomposites, which exhibit remarkable EM microwave absorption performances with RL value of −51 dB at 5.52 GHz and effective bandwidth of 3.9 GHz.

Rationally designed hierarchical N-doped carbon nanotubes wrapping waxberry-like Ni@C microspheres for efficient microwave absorption

2021 ◽  
Author(s):  
Dawei Liu ◽  
Yunchen Du ◽  
Ping Xu ◽  
Fengyuan Wang ◽  
Yahui Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Composition ◽  
Microwave Absorption ◽  
Microstructure Design ◽  
Composition Modulation ◽  
Absorption Performance ◽  
Microwave Absorption Performance

The enhanced microwave absorption performance of composites benefits from simultaneous rational microstructure design and chemical composition modulation.

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