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Lightweight and efficient luffa sponge carbon/Co composites with adjustable electromagnetic wave absorption
Yanan Huang1, Konghu Tian2, Chao Zhang1
1School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
Journal of Colloid and Interface Science
|September 1, 2023
Summary
Lightweight luffa sponge carbon/cobalt (CLS/Co) composites were developed for electromagnetic wave (EMW) absorption. Optimized at 700°C, CLS/Co achieved excellent absorption performance with minimal reflection loss and broad bandwidth at a thin thickness.
Area of Science:
- Materials Science
- Nanotechnology
- Green Chemistry
Background:
- Biomass materials offer sustainable solutions for modern technological demands.
- Electromagnetic wave (EMW) absorption is a critical application for advanced materials.
- Luffa sponge carbon (CLS) presents a lightweight, porous carbon source for material development.
Purpose of the Study:
- To synthesize novel lightweight luffa sponge carbon/cobalt (CLS/Co) composites.
- To investigate the effect of pyrolysis temperature on the microstructure and EMW absorption properties of CLS/Co composites.
- To evaluate the potential of CLS/Co composites as efficient EMW absorbers.
Main Methods:
- Utilized luffa sponge as a carbon precursor.
- Synthesized CLS/Co composites via static reaction and heat treatment.
- Controlled electromagnetic properties by adjusting pyrolysis temperature.
Main Results:
- CLS/Co composites exhibited excellent EMW absorption capabilities.
- At 700°C, achieved minimum reflection loss (RLmin) of -60.81 dB and effective absorption bandwidth (EAB) of 5.56 GHz at 1.68 mm thickness.
- At 800°C, demonstrated strong absorption (-50 dB) across various thicknesses.
Conclusions:
- Pyrolysis temperature critically influences the EMW absorption performance of CLS/Co composites.
- The developed CLS/Co composites are highly efficient and lightweight EMW absorbers.
- These findings highlight the potential of biomass-derived composites for advanced EMW absorption applications.
