Measuring the Degree of Anisotropy of Electrical Properties of Epoxy Resin–Magnetic Fluid–Carbon Nanotube Composite

IF 0.9 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Russian Journal of Nondestructive Testing Pub Date : 2025-06-10 DOI:10.1134/S1061830924603453

A. E. Postelga, S. V. Igonin

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Abstract

The electrical properties of a material representing a composite of epoxy resin, magnetic fluid, and carbon nanotubes are investigated. It is shown that in composites dried in the presence of a magnetic field, elongated conductive structures consisting of carbon nanotubes and magnetic fluid are formed. Their presence causes the appearance of anisotropy of the electrical properties of such composites. The anisotropy of the properties is studied by microwave waveguide methods, according to the frequency dependence of the reflection coefficient of microwave radiation from a periodic structure in which the composite under study was used as a damaged layer. It has been found that the electrical properties of the composite depend on the magnitude and direction of the magnetic field induction, as well as on changes in the concentration of components in the composite. Numerical modeling was performed and the importance of taking into account the anisotropy of the electrical properties of the formed structures when calculating the integral parameters of the composite is shown.

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环氧树脂-磁流体-碳纳米管复合材料电性能各向异性程度的测定

研究了环氧树脂、磁性流体和碳纳米管复合材料的电学性能。结果表明，在磁场作用下干燥的复合材料中，形成了由碳纳米管和磁性流体组成的细长导电结构。它们的存在导致了这种复合材料电性能的各向异性的出现。根据研究中的复合材料作为损伤层的周期性结构中微波辐射反射系数的频率依赖性，用微波波导方法研究了其性能的各向异性。研究发现，复合材料的电学性能取决于磁场感应的大小和方向，以及复合材料中组分浓度的变化。数值模拟表明，在计算复合材料的整体参数时，考虑形成结构的电性能各向异性的重要性。

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来源期刊

Russian Journal of Nondestructive Testing 工程技术-材料科学：表征与测试

CiteScore

1.60

自引率

44.40%

发文量

审稿时长

6-12 weeks

期刊介绍： Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).