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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
Published on: September 19, 2020
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Improved Triboelectric Nanogenerator Output Performance through Polymer Nanocomposites Filled with
Xinyu Du1,2, Yuebo Liu3,4, Jiaona Wang3,4
1Beijing Institute of Nanoenergy and Nanosystems , Chinese Academy of Sciences , Beijing 100083 , P. R. China.
ACS Applied Materials & Interfaces
|July 6, 2018
Summary
Core-shell barium titanate-poly(tert-butyl acrylate) nanoparticles enhance poly(vinylidene fluoride) composites. These materials show improved dielectric properties and a 2.5x higher output current for triboelectric nanogenerators.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Barium titanate (BaTiO3) is a high-permittivity ceramic material.
- Poly(vinylidene fluoride) (PVDF) is a flexible polymer with low dielectric loss.
- Core-shell nanoparticles offer tunable properties by combining inorganic and organic components.
Purpose of the Study:
- To synthesize core-shell BaTiO3-poly(tert-butyl acrylate) (PtBA) nanoparticles.
- To incorporate these nanoparticles into a PVDF matrix to create advanced nanocomposites.
- To evaluate the dielectric properties and performance of the resulting nanocomposites in triboelectric nanogenerators (TENGs).
Main Methods:
- In situ atom transfer radical polymerization of tert-butyl acrylate (tBA) on BaTiO3 nanoparticle surfaces to create core-shell structures.
- Control over PtBA shell thickness by adjusting the feed ratio of tBA to BaTiO3.
- Fabrication of BaTiO3-PtBA/PVDF nanocomposite films and characterization of their dielectric and triboelectric properties.
Main Results:
- Successfully synthesized BaTiO3-PtBA core-shell nanoparticles with controllable shell thickness.
- BaTiO3-PtBA/PVDF nanocomposites exhibited enhanced dielectric constants (∼15 at 100 Hz and 26.5 at 150 MV/m) while maintaining PVDF's low dielectric loss.
- Nanocomposite-based TENGs showed a 2.5-fold increase in output current density (2.1 μA/cm²) compared to pure PVDF TENGs.
Conclusions:
- Core-shell BaTiO3-PtBA nanoparticles effectively enhance the dielectric performance of PVDF.
- The developed nanocomposites are promising for energy storage and harvesting applications.
- The enhanced TENG performance highlights the potential of these materials for flexible electronic devices.
Keywords:
core−shell structuredielectricin situ polymerizationnanocompositetriboelectric nanogeneratorMore Related Videos
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