Designing Carbon-Foam Composites via Molten-State Reduction for Multifunctional Electromagnetic Interference...

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Growing demand for effective electromagnetic interference (EMI) shielding materials due to increased electronic device usage.
• Existing EMI shielding materials often lack mechanical strength, limiting their application in demanding scenarios.
• Need for multifunctional materials that combine EMI shielding with other desirable properties.

Purpose of the Study:

• To develop an efficient EMI shielding composite with high mechanical strength and multifunctionality.
• To investigate a molten-state-based in situ reduction strategy for fabricating the composite.
• To uniformly disperse Co-nanoparticles on a carbon foam matrix for enhanced performance.

Main Methods:

• Molten-state-based in situ reduction strategy.
• Fabrication of a carbon foam matrix with uniformly dispersed Co-nanoparticles.
• Characterization of EMI shielding effectiveness, mechanical strength, and multifunctional properties.

Main Results:

• Achieved an optimal shielding effectiveness of 32.6 dB and compressive strength of 38.31 MPa.
• Demonstrated significant improvements of 65.4% in shielding effectiveness and 123.4% in compressive strength compared to pristine carbon foam.
• Exhibited desirable electrochemical and photothermal conversion properties alongside EMI shielding and mechanical robustness.

Conclusions:

• The developed composite offers a promising solution for advanced EMI shielding applications requiring high mechanical strength.
• The in situ reduction strategy effectively enhances EMI shielding performance and mechanical robustness.
• The material's multifunctionality opens possibilities for integrated applications in advanced electronics.