Lightweight and flexible Ni-Co alloy nanoparticle-coated electrospun polymer nanofiber hybrid membranes for high-performance electromagnetic interference shielding

Zhang, Nan; Zhao, Rui; He, Dayong; Ma, Yuying; Qiu, Jianying; Jin, Changxian; Wang, Ce

doi:10.1016/j.jallcom.2018.12.341

Cited by 87 publications

(46 citation statements)

References 57 publications

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“…Second, due to the high frequency alternating electric field of electromagnetic waves, interfacial polarization loss is caused by rapid exchange of excited charges between the conductive fillers (Ni and CNTs) of the composite [48,49]. Third, when magnetic nanoparticles are contained in the composite, the alternating magnetic field of the electromagnetic waves causes magnetic domain resonance and natural eddy currents of the magnetic substance to generate magnetic loss [50,51]. Obviously, after the composite material is processed by the supercritical CO 2 foaming process, the microwave attenuation loss changes in regard of two aspects.…”

Section: Electrical and Emi Shielding Properties Of The Pvdf/cnts/ni ...mentioning

confidence: 99%

Ultrahigh and Tunable Electromagnetic Interference Shielding Performance of PVDF Composite Induced by Nano-Micro Cellular Structure

Yang

Zeng

et al. 2022

Polymers

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Lightweight and efficient electromagnetic interference (EMI) shielding materials play a vital role in protecting high-precision electronic devices and human health. Porous PVDF/CNTs/urchin-like Ni composites with different cell sizes from nanoscale to microscale were fabricated through one-step supercritical carbon dioxide (CO2) foaming. The electrical conductivity and electromagnetic interference (EMI) shielding performance of the composites with different cell sizes were examined in detail. The results indicated that the nanoscale cell structure diminishes the EMI shielding performance of the composite, whereas the microscale cell structure with an appropriate size is beneficial for improving the EMI shielding performance. A maximum EMI shielding effectiveness (SE) of 43.4 dB was achieved by the composite foams which is about twice that of the solid composite. Furthermore, as the supercritical CO2 foaming process reduces the density of the composite by 25–50%, the EMI SSE (specific shielding effectiveness)/t(thickness) of the composite reaches 402 dB/(g/cm2), which is the highest value of polymer foam obtained to the best of the authors’ knowledge. Finally, compression tests were performed to show that the composites still maintained excellent mechanical properties after the supercritical CO2 foaming process.

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Section: Electrical and Emi Shielding Properties Of The Pvdf/cnts/ni ...mentioning

confidence: 99%

Ultrahigh and Tunable Electromagnetic Interference Shielding Performance of PVDF Composite Induced by Nano-Micro Cellular Structure

Yang

Zeng

et al. 2022

Polymers

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“…Therefore, preparing a practical, flexible, lightweight, and efficient EMI-shielding material is a huge challenge that has attracted the interest of many researchers at home and abroad [15][16][17][18][19][20][21]. In addition to the progress in this area, the development of a new family of flexible electromagnetic shielding materials based on nanofibrous films is also of great interest [13,14,[22][23][24][25][26][27][28][29]. For example, Ji et al reported on a highly flexible porous electrospinning crosslinked polyacrylonitrile nanofiber decorated with metal (Ag, Cu, Ni) nanoparticles that exhibited an excellent EMI-shielding performance [13].…”

Section: Introductionmentioning

confidence: 99%

Magnetic-Electrospinning Synthesis of γ-Fe2O3 Nanoparticle–Embedded Flexible Nanofibrous Films for Electromagnetic Shielding

et al. 2020

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The exploration of a new family of flexible and high-performance electromagnetic shielding materials is of great significance to the next generation of intelligent electronic products. In this paper, we report a simple magnetic-electrospinning (MES) method for the preparation of a magnetic flexible film, γ-Fe2O3 nanoparticle-embedded polymeric nanofibers. By introducing the extra magnetic field force on γ-Fe2O3 nanoparticles within composite fibers, the critical voltage for spinning has been reduced, along with decreased fiber diameters. The MES fibers showed increased strength for the magnetic field alignment of the micro magnets, and the attraction between them assisted the increase in fiber strength. The MES fibers show modifications of the magnetic properties and electrical conductivity, thus leading to better electromagnetic shielding performance.

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“…To achieve a satisfactory shielding performance, it is important to have high shielding effectiveness (SE). Conductive materials with high reflection shielding effectiveness (SE R ), for example, metal, 6,7 MXene, 2,4,5,8,9 and carbon 10–16 -based films have been preferred as they can effectively block and reflect EM waves. They usually have more than 30 dB SE, corresponding to less than 0.1% of EM wave transmission.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic wave shielding flexible films with near-zero reflection in the 5G frequency band

et al. 2022

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Lightweight and flexible Ni-Co alloy nanoparticle-coated electrospun polymer nanofiber hybrid membranes for high-performance electromagnetic interference shielding

Cited by 87 publications

References 57 publications

Ultrahigh and Tunable Electromagnetic Interference Shielding Performance of PVDF Composite Induced by Nano-Micro Cellular Structure

Ultrahigh and Tunable Electromagnetic Interference Shielding Performance of PVDF Composite Induced by Nano-Micro Cellular Structure

Magnetic-Electrospinning Synthesis of γ-Fe2O3 Nanoparticle–Embedded Flexible Nanofibrous Films for Electromagnetic Shielding

Electromagnetic wave shielding flexible films with near-zero reflection in the 5G frequency band

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