PVDF-Ni/PE-CNTs Composite Foams with Co-Continuous Structure for Electromagnetic Interference Shielding and Photo-Electro-Thermal Properties

Considering the severity of electromagnetic wave contamination and the complexity of the application environment, it is urgent need to centralize multifunction into one material.The environmental durability and large-scale production of electromagnetic shielding foams are major obstacles for industrial applications.Herein, a multifunctional composites foam with high-efficiency electromagnetic interference shielding (EMI) and excellent photo-electro-thermal properties were fabricated by melt extrusion and batch foaming.Due to the porous structure and heterogeneous dielectric/magnetic interface, the obtained composite foams have high electrical conductivity (up to 1.08  10 -2 S/cm) and EMI shielding efficiency (SE) reaching ~27.8 dB in the K band.Moreover, the porous co-continuous structure, surface plasmon resonance effect and high conductivity endowed the composite foams with hydrophobicity, remarkable photo-thermal effect and voltage driven joule heating properties, which can guarantee work normally in humid and extreme cold conditions.This study provide inspiration for the further design and synthesis of high-performance multifunction EMI materials.