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Journal of Advanced Ceramics 2021, 10(2): 368-376 https://doi.org/10.1007/s40145-020-0443-0
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Freeze-drying and hot-pressing strategy to embed two-dimensional Ti0.87O2 monolayers in commercial polypropylene films with enhanced dielectric properties

Show Author's Information Wenchao TIANa,  Fei YANc,  Cailing CAIa,  Zeyi WUa,  Chenchen ZHANGb,  Ting YINc,  Sijia LAOc,  Linfeng HUa( )
Department of Materials Science, Fudan University, Shanghai 200433, China
State Grid Anhui Electric Power Institute, Hefei 230022, China
China Electric Power Research Institute, Beijing 100192, China
Keywords:
Ti0.87O2 nanosheets, polypropylene (PP), freeze-drying, surface functionalization, hot-pressing, dielectric constant
Cite this article:
TIAN W, YAN F, CAI C, et al. Freeze-drying and hot-pressing strategy to embed two-dimensional Ti0.87O2 monolayers in commercial polypropylene films with enhanced dielectric properties. Journal of Advanced Ceramics, 2021, 10(2): 368-376. https://doi.org/10.1007/s40145-020-0443-0
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Abstract Full text About this article

The dielectric capacitor has been widely used in advanced electronic and electrical power systems due to its capability of ultrafast charging-discharging and ultrahigh power density. Nevertheless, its energy density is still limited by the low dielectric constant (≈ 2.2) of the commercial dielectric polypropylene (PP). The conventional enhancement strategy by embedding inorganic fillers in PP matrix is still difficult and challenging due to that PP hardly dissolves in any inorganic/organic solvent. In this work, we develop a new strategy including freeze-drying, surface functionalization, and hot-pressing to incorporate Ti0.87O2 monolayers in PP film. A series of uniform composited Ti0.87O2@PP film has been successfully fabricated with Ti0.87O2 content range of 0-15 wt%. The maximum dielectric constant of the as-prepared Ti0.87O2@PP film is 3.27 when the Ti0.87O2 content is 9 wt%, which is about 1.5 times higher than that of pure PP. Our study provides a feasible strategy to embed two-dimensional material into commercial PP thin-film with superior dielectric performance for practical application.


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About this article

Freeze-drying and hot-pressing strategy to embed two-dimensional Ti0.87O2 monolayers in commercial polypropylene films with enhanced dielectric properties

Show Author's information Wenchao TIANa, Fei YANc, Cailing CAIa, Zeyi WUa, Chenchen ZHANGb, Ting YINc, Sijia LAOc, Linfeng HUa( )
Department of Materials Science, Fudan University, Shanghai 200433, China
State Grid Anhui Electric Power Institute, Hefei 230022, China
China Electric Power Research Institute, Beijing 100192, China

Abstract

The dielectric capacitor has been widely used in advanced electronic and electrical power systems due to its capability of ultrafast charging-discharging and ultrahigh power density. Nevertheless, its energy density is still limited by the low dielectric constant (≈ 2.2) of the commercial dielectric polypropylene (PP). The conventional enhancement strategy by embedding inorganic fillers in PP matrix is still difficult and challenging due to that PP hardly dissolves in any inorganic/organic solvent. In this work, we develop a new strategy including freeze-drying, surface functionalization, and hot-pressing to incorporate Ti0.87O2 monolayers in PP film. A series of uniform composited Ti0.87O2@PP film has been successfully fabricated with Ti0.87O2 content range of 0-15 wt%. The maximum dielectric constant of the as-prepared Ti0.87O2@PP film is 3.27 when the Ti0.87O2 content is 9 wt%, which is about 1.5 times higher than that of pure PP. Our study provides a feasible strategy to embed two-dimensional material into commercial PP thin-film with superior dielectric performance for practical application.

Keywords: Ti0.87O2 nanosheets, polypropylene (PP), freeze-drying, surface functionalization, hot-pressing, dielectric constant

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Publication history
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Publication history

Received: 13 August 2020
Revised: 03 December 2020
Accepted: 05 December 2020
Published: 05 February 2021
Issue date: April 2021

Copyright

© The Author(s) 2020

Acknowledgements

This work was financially supported by the Researching Program of State Grid Corporation of China (GYW17201800011): Research and Application of Key Technologies to Improve the Performance of Film Insulator for High Voltage Capacitive Equipment.

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