Multifunctional WSCA /MXene Composite Paper for Electromagnetic Interference Shielding, Respiratory Monitoring, and...

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Wearable electronics necessitate advanced materials for electromagnetic shielding (EMI) and physiological monitoring.
• Current materials often lack multifunctionality, posing a challenge for integrated devices.

Purpose of the Study:

• To develop a novel composite nanopaper with combined EMI shielding and physiological monitoring capabilities.
• To address the limitations of single-function materials in wearable technology.

Main Methods:

• Fabrication of Water-Soluble Cellulose Acetate (WSCA)/MXene composite paper (CM) using vacuum-assisted filtration.
• Characterization of the composite's structure, electrical conductivity, EMI shielding, tensile strength, and photothermal properties.

Main Results:

• The CM nanopaper achieved a high EMI shielding of 77.4 dB and electrical conductivity of 16,817.4 S m⁻¹.
• Demonstrated accurate respiration monitoring and efficient electrical/photothermal conversion, reaching temperatures up to 113.8 °C.
• Exhibited a tensile strength of 89.6 MPa and infrared stealth capabilities over a wide temperature range (32-114 °C).

Conclusions:

• The WSCA/MXene composite paper offers a dual-function material overcoming traditional limitations.
• Potential applications include personal electromagnetic protection, thermal management, and intelligent medical sensing.