Effects of Graphene Oxide Dimension on the Mechanical and Dielectric Properties of Epoxy Resin

IF 1 4区化学 Q4 POLYMER SCIENCE

Polymer Science, Series A Pub Date : 2024-03-25 DOI:10.1134/S0965545X24600066

Yi Zhang

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Abstract

To study the effects of graphene oxide (GO) dimension on the mechanical and dielectric performance of epoxy resin (EP), two kinds of GO with different dimensions were selected and characterized by Fourier transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results showed that the two kinds of GO had similar chemical structure, but different average particle sizes of 190.1 nm (SGO) and 1510 nm (MGO), respectively. The mechanical properties, dynamic mechanical properties, and dielectric properties of the EP/GO composites are analyzed using electronic universal testing machine, Rockwell hardness tester, dynamic mechanical analysis (DMA) and broadband dielectric impedance relaxation spectrometer. Results revealed that the GO dimension plays important role in determining the dispersion of the filler in EP matrix, and further determines the mechanical properties and dielectric performance of the composites. EP/SGO with better dispersion of GO in the EP matrix exhibits better mechanical properties, higher glass transition temperature, higher dielectric constant. Related mechanism has been proposed.

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石墨烯氧化物尺寸对环氧树脂机械性能和介电性能的影响

摘要为研究氧化石墨烯（GO）尺寸对环氧树脂（EP）机械性能和介电性能的影响，选取了两种不同尺寸的氧化石墨烯（GO），并通过傅立叶变换红外光谱仪（FTIR）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）和 X 射线衍射仪（XRD）对其进行了表征。结果表明，两种 GO 具有相似的化学结构，但平均粒径不同，分别为 190.1 nm（SGO）和 1510 nm（MGO）。使用电子万能试验机、洛氏硬度计、动态力学分析（DMA）和宽带介电阻抗弛豫光谱仪分析了 EP/GO 复合材料的力学性能、动态力学性能和介电性能。结果表明，GO 尺寸在决定填料在 EP 基体中的分散性方面起着重要作用，并进一步决定了复合材料的机械性能和介电性能。EP/SGO 在 EP 基体中的分散性越好，其力学性能越好，玻璃化转变温度越高，介电常数越大。提出了相关的机理。

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来源期刊

Polymer Science, Series A 化学-高分子科学

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Polymer Science, Series A is a journal published in collaboration with the Russian Academy of Sciences. Series A includes experimental and theoretical papers and reviews devoted to physicochemical studies of the structure and properties of polymers (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed. Online submission via Internet to the Series A, B, and C is available at http://polymsci.ru.