首页|MOF-derived ZrO2/C-polyvinylidene fluoride composite towards negative permittivity regulation mechanism

MOF-derived ZrO2/C-polyvinylidene fluoride composite towards negative permittivity regulation mechanism

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Composites featuring negative permittivity have garnered significant attention for their potential in novel capacitance designs,coil-less electrical inductors,and electromagnetic shielding applications.In this study,we prepared polyvinylidene fluoride(PVDF)matrix composites filled with ZrO2/C nanoparticles de-rived from metal-organic frameworks(MOFs)via a hot-pressing method.With an increase in the ZrO2/C content to 30 wt.％,electrical percolation was observed,accompanied by a transition mechanism from hopping conduction to metal-like conduction.This enabled the realization of ZrO2/C/PVDF composites with tailorable negative permittivity properties,attributed to the plasmonic oscillation of free electrons in the composites beyond the percolation threshold(30 wt.％).Furthermore,the permittivity transition along to a shift in the electrical behavior of the percolative composites from capacitive to inductive.We explored the regulatory mechanism behind the negative permittivity in this random composite system,and our findings highlight the potential of these tunable negative permittivity media as promising candi-dates for diverse electromagnetic applications.

Negative permittivityElectrical propertiesPlasma oscillationPolymeric composites

X.T.Song、G.H.Fan、Y.Liu、R.H.Fan

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Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),Jinan 250061,China

Institute of Advanced Electrical Materials,Qingdao University of Science & Technology,Qingdao 266042,China

College of Ocean Science and Engineering,Shanghai Maritime University,Shanghai 201306,China

National Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Youth Fund

522721172022YFB35051042022YFB370660452207239

2024

10.1016/j.jmst.2023.08.024

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.179(12)
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