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Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core-Shell Structured PDA@TiC
Xinfu He1,2, Jun Zhou1, Liuyan Jin1
1School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.
Materials (Basel, Switzerland)
|July 31, 2020
Summary
Surface modifying titanium carbide (TiC) nanoparticles with polydopamine (PDA) created an insulating interlayer. This enhanced the dielectric and mechanical properties of thermoplastic polyurethane (TPU) composites for electronic applications.
Area of Science:
- Materials Science
- Polymer Science
- Nanotechnology
Background:
- Dielectric loss in polymer composites is a significant challenge.
- Effective insulation between nanoparticles and polymer matrices is crucial for performance.
Purpose of the Study:
- To investigate the effect of a polydopamine (PDA) interlayer on titanium carbide (TiC) nanoparticles.
- To enhance the dielectric and mechanical properties of thermoplastic polyurethane (TPU) composites.
Main Methods:
- Surface modification of TiC nanoparticles with PDA to create PDA@TiC.
- Incorporation of PDA@TiC into a TPU matrix.
- Characterization of composite dispersion, dielectric properties, and mechanical performance.
Main Results:
- PDA@TiC exhibited homogeneous dispersion in the TPU matrix compared to pristine TiC.
- PDA@TiC/TPU composites showed significantly lower dissipation factors and enhanced dielectric breakdown strength.
- Improved tensile strength and elongation at break were observed in PDA@TiC/TPU composites.
Conclusions:
- The nanoscale PDA interlayer acts as an effective insulator, preventing direct contact between TiC particles and suppressing dielectric loss.
- Enhanced interfacial interactions between PDA@TiC and TPU improved mechanical properties.
- The developed flexible PDA@TiC/TPU composites offer potential for high-permittivity, low-loss electronic and electrical applications.
