A self-assembled graphene/polyurethane sponge for excellent electromagnetic interference shielding performance

Area of Science:

• Materials Science
• Nanotechnology
• Electrical Engineering

Background:

• Growing demand for effective electromagnetic interference (EMI) shielding materials due to proliferation of electronic devices.
• Graphene sponges show promise for EMI shielding due to conductivity and 3D structure, but lack elasticity and durability.
• Need for advanced materials to mitigate electromagnetic pollution in military and civilian applications.

Purpose of the Study:

• To develop a novel graphene/polyurethane sponge composite for enhanced EMI shielding.
• To investigate the EMI shielding performance and durability of the synthesized composite material.
• To introduce a facile synthesis method for high-performance EMI shielding materials.

Main Methods:

• A two-step hydrothermal method was employed to synthesize the graphene/polyurethane sponge composite.
• The composite material was characterized for its structural, electrical, and EMI shielding properties.
• Specific EMI shielding effectiveness was measured and compared to existing materials.

Main Results:

• The graphene/polyurethane sponge composite achieved a high specific EMI shielding effectiveness of 969-1578 dB cm² g⁻¹.
• The material demonstrated comparable or superior performance to traditional graphene/polymer sponges.
• The polyurethane scaffold provided structural integrity, enhancing the material's durability.

Conclusions:

• The developed graphene/polyurethane sponge composite offers excellent EMI shielding performance and improved durability.
• The two-step hydrothermal method is an efficient approach for creating high-performance EMI shielding materials.
• This composite presents a viable solution for reducing electromagnetic pollution from electronic devices.