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

Abstract

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.

A journey of thermoplastic elastomer nanocomposites for electromagnetic shielding applications: from bench to transitional research

“…Absorption is the secondary mechanism in EMI shielding. Unlike metals, where shielding is primarily due to reflection, for polymer nanocomposites, shielding is driven by absorption, 64,66 which helps in controlling EM smog. Thus, shielding by absorption is mainly due to the current generated in the material (Ohmic losses) and magnetic hysteresis losses.…”

Facile synthesis of a 2D multilayer core–shell MnO2@LDH@MMT composite with a nanoflower shape for electromagnetic wave absorption

“…43 Its eddy current loss is described as follows: 45 Fig. 7c shows that the C o values and μ″ remain in the same range, and at 9-18 GHz, the C o values of the composite remain essentially constant, with small fluctuations present, which are mainly caused by eddy current losses and exchange resonances (10)(11)(12)(13)(14)(15)(16)(17)(18). At 2-9 GHz, C o undergoes a large increase, which is attributable to natural resonance (2-10 GHz).…”

“…At 2-9 GHz, C o undergoes a large increase, which is attributable to natural resonance (2-10 GHz). 46 In summary, the magnetic losses of MNFM are due to natural resonance (2-10 GHz), exchange resonance, and eddy current losses (10)(11)(12)(13)(14)(15)(16)(17)(18).…”

“…7,8 Therefore, various types of composite materials are currently designed to promote EW absorption performance by exploiting the synergistic effects between different components and structures. 9,10 Examples are snowflake MnO 2 @NiCo 2 O 4 , 11 CF/SiO, 12 flower-like NiFe 2 O 4 / graphene, 13 NiM-MF/PEG, 14 cellulose/m-SiC NW/m-BN aerogel, 15 PVDF-Ni/PE-CNTs, 16 Fe/SiC, 17 Co/C crabapples, 18 MXene and conducting polymer matrix composites, 19 etc. Two-dimensional materials 20 provide conditions for structural design and performance optimization of electromagnetic materials owing to their distinctive two-dimensional structure, high specific surface area, and surface modification space.…”

Computational Optimizing the Electromagnetic Wave Reflectivity of Double‐Layered Polymer Nanocomposites

“…[1][2][3][4] Moreover, people also focus on the harm to human health caused by the thermal effect of electromagnetic (EM) waves. [5][6][7][8][9] Therefore, the market demand for EMI shielding materials has undergone rapid growth in recent years. [10][11][12][13][14] There are two types of EM wave shielding, namely reflection and absorption.…”