Flexible and Robust Core-Shell PANI/PVDF@PANI Nanofiber Membrane for High-Performance Electromagnetic Interference...

Area of Science:

• Materials Science
• Nanotechnology
• Polymer Chemistry

Background:

• High-performance electromagnetic interference (EMI) shielding materials are crucial for modern electronics and microwave protection.
• Existing materials often lack the desired combination of lightweight, flexibility, and mechanical strength.
• Developing advanced shielding solutions is essential for integrated electronic devices.

Purpose of the Study:

• To prepare core-shell polyaniline (PANI)-based nanofiber membranes for effective EMI shielding.
• To investigate the structure-property relationship for enhanced microwave absorption and reflection.
• To evaluate the mechanical and physical properties for practical applications.

Main Methods:

• Seed polymerization technique to create PANI core-shell structures on nanofibers.
• Electrospinning of polyaniline (PANI) solution for uniform dispersion and growth.
• Characterization of the composite membrane's structure, mechanical properties, and EMI shielding performance.

Main Results:

• Achieved a shielding efficiency (SE) of 44.7 dB at a thickness of 1.2 mm.
• Demonstrated a high specific EMI shielding effectiveness (SE/t) of 372.5 dB cm⁻¹.
• The PANI/PVDF@PANI membranes exhibited excellent mechanical stability, durability, air, and moisture permeability.

Conclusions:

• The core-shell PANI nanofiber membranes are highly effective for EMI shielding.
• The unique heterostructure enhances microwave reflection and absorption.
• These materials show great potential for applications in wearable electronics and protective clothing.