Journal
COMPOSITES COMMUNICATIONS
Volume 23, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2020.100562
Keywords
Poly(vinylidene difluoride); MXene; Dielectric permittivity; Nanocomposite
Categories
Funding
- National Key Research and Development Program of China [2016YFB0302300]
- Key Program of National Natural Science Foundation of China [51933004]
- Fundamental Research Funds for the Central Universities [2019MS062]
- Natural Science Foundation of Guangdong Province [2018A030313275]
- Australian Research Council Discovery Early Career Research Award [DE190101176]
- City University of Hong Kong [9678103]
- Opening Project of Key Laboratory of Polymer Processing Engineering (South China University of Technology), Ministry of Education of China [KFKT1904]
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Dielectric polymer nanocomposites with high dielectric permittivity and low dielectric loss are crucial for energy storage applications. In this study, PVDF/MXene nanocomposites with enhanced dispersion and compatibility were successfully prepared. The addition of MXene@CTAB contributed to improved dielectric properties and potential applications in energy storage devices for electronics.
Dielectric polymer nanocomposites with high dielectric permittivity and low dielectric loss have great applications in energy storage field. In this study, a series of PVDF/MXene nanocomposites was prepared by solution method. The surface of MXene was functionalized with cetyltrimethylammonium bromide (MXene@CTAB) to achieve better dispersion in poly(vinylidene fluoride) (PVDF) matrix. The results revealed that the MXene@CTAB dispersed uniformly and had a good compatibility with PVDF matrix. In addition, the dynamical rheological test revealed that the viscosity and storage modulus of PVDF nanocomposites increased with the increasing of MXene@CTAB loading. The PVDF/MXene@CTAB nanocomposite containing 7 wt% MXene@CTAB exhibited a dielectric permittivity of 82.1 and a loss factor as low as 0.2 at 1 kHz. The presence of CTAB could serve as an insulating layer to suppress dielectric loss and AC conductivity of PVDF nanocomposites simultaneously. The PVDF/MXene@CTAB nanocomposite with high dielectric permittivity may find potential applications in energy storage capacitors for electronics. Moreover, the addition of MXene@CTAB contributed to the formation of Beta phase of PVDF.
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