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MWCNTs-TiO2 core-shell nanoassemblies for fabrication of poly(vinylidene fluoride) based composites with high breakdown strength and discharged energy density

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Abstract

Dielectric polymer composites with high breakdown strength and discharged energy density have potential applications in modern electric power systems. In this study, composites comprising MWCNTs-TiO2 core-shell nanoparticles and poly(vinylidene fluoride) (PVDF) were fabricated by a solution casting method, followed by a melting and quenching process. The obtained composites are γ-phase PVDF dominated and present a dense structure. By the incorporation of MWCNTs-TiO2 core-shell nanoparticles, the dielectric constant of composites can be significantly enhanced while the dielectric loss of composites remains low. Because of the core-shell structure of well-dispersed MWCNTs-TiO2 and their strong interactions with matrix, high breakdown strength above 175 V/μm can be achieved in the composites. Additionally, the composites exhibit enhanced discharged energy density, which can be as high as 6.4 J/cm3 at 250 V/μm, while the maximum discharged energy density obtained in pure PVDF is only 2.6 J/cm3 (270 V/μm).

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Acknowledgments

This work was supported by the Major State Basic Research Development Program of China (973 Program, Grant No National. 2015CB057501), Fundamental Research Funds for the Central Universities (NE2015101& NE2015001). It is also partially supported by the Research Fund of State Key Laboratory of Mechanical Structures (No.0515Y02) and Priority Academic Program Development of Jiangsu Higher Education Instituations (PAPD).

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Authors and Affiliations

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Lu Yang, Jinhao Qiu, Hongli Ji, Kongjun Zhu, Jing Wang & Jingsong Liu

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  1. Lu Yang
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  2. Jinhao Qiu
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  3. Hongli Ji
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  4. Kongjun Zhu
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  5. Jing Wang
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  6. Jingsong Liu
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Correspondence to Jinhao Qiu.

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Yang, L., Qiu, J., Ji, H. et al. MWCNTs-TiO2 core-shell nanoassemblies for fabrication of poly(vinylidene fluoride) based composites with high breakdown strength and discharged energy density. J Polym Res 23, 65 (2016). https://doi.org/10.1007/s10965-016-0951-3

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  • DOI: https://doi.org/10.1007/s10965-016-0951-3

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