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Research on thermal conductivity and electrical insulation properties of epoxy composites with fluorescent grafted zero-dimensional Al2O3

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Abstract

We report the preparation of epoxy composites with enhanced thermal conduction and dielectric properties by grafting fluorescein isothiocyanate (FITC) onto zero-dimensional alumina (Al2O3) as filler, and the spacing and spatial distribution of filler particles were characterized by confocal laser scanning microscopy. Compared to pure epoxy resin (EP), the thermal conductivity and dielectric permittivity of epoxy composite can be significantly improved by adding filler. For example, an Al2O3-FITC/EP composite with a filling content of 3 wt% has thermal conductivity above 0.27 W·m−1·K−1, which is nearly 30% better than that of pure EP. At the same time, the composite has enhanced dielectric permittivity in the range of electric field frequencies tested at room temperature. This research will provide some practical information for analyzing the effect of spatial distribution of filler particles on the thermal conductivity and electrical insulation properties of composites.

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Acknowledgements

The authors thank the funding from the State Key Laboratory of Electrical Insulation and Power Equipment Open Project (No. EIPE22210); Shaanxi Provincial Science and Technology Department Youth Foundation (No. 2022JQ-300); Shaanxi Province Industry-University-Research Collaborative Innovation Plan (No. 2023YFBT-45-02). Thanks for the Instrumental Analysis Center Xi’an University of Architecture and Technology and Ms. Zhixian He and Ms. Jiaoe Dang from this center.

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Zhengdong Wang, Meng Luo, Xiaozhuo Wang, Yuanhang Zhou, Xiaolong Cao & Nannan Zhao

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  1. Zhengdong Wang
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  2. Meng Luo
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  3. Xiaozhuo Wang
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  4. Yuanhang Zhou
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  5. Xiaolong Cao
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  6. Nannan Zhao
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Contributions

ZW and NZ conceived the idea; ML, XW, YZ and XC conducted the experiments and data analysis; ZW, ML and XW performed the literature research and drafted the manuscript; ZW and NZ performed the review and final editing. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Zhengdong Wang or Nannan Zhao.

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Wang, Z., Luo, M., Wang, X. et al. Research on thermal conductivity and electrical insulation properties of epoxy composites with fluorescent grafted zero-dimensional Al2O3. J Mater Sci: Mater Electron 34, 1385 (2023). https://doi.org/10.1007/s10854-023-10788-x

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