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Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core–Shell Structured [email protected] Particles

1
School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2
Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resources, Xi’an 710021, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(15), 3341; https://doi.org/10.3390/ma13153341
Received: 10 June 2020 / Revised: 15 July 2020 / Accepted: 20 July 2020 / Published: 27 July 2020
Insulating interlayer between nanoparticles and polymer matrix is crucial for suppressing the dielectric loss of polymer composites. In this study, titanium carbide (TiC) particles were surface modified by polydopamine (PDA), and the obtained [email protected] powders were used to reinforce thermoplastic polyurethane (TPU). The results indicate that the [email protected] were homogenously dispersed in the matrix compared with the pristine TiC, and that the [email protected]/TPU composites show improved dielectric and mechanical properties, i.e., much lower dissipation factors and obviously enhanced dielectric breakdown strength, as well as higher tensile strength and elongation at break as compared to the raw TiC/TPU. The nanoscale PDA interlayer contributes to the dielectric and mechanical enhancements because it not only serves as an insulating shell that prevents TiC particles from direct contacting and suppresses the loss and leakage current to very low levels, but also enhances the interfacial interactions thereby leading to improved mechanical strength and toughness. The prepared flexible [email protected]/TPU with high permittivity but low loss will find potential applications in electronic and electrical applications. View Full-Text
Keywords: polymer matrix composites; electrical properties; mechanical properties; polyurethane; titanium carbide; polydopamine polymer matrix composites; electrical properties; mechanical properties; polyurethane; titanium carbide; polydopamine
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MDPI and ACS Style

He, X.; Zhou, J.; Jin, L.; Long, X.; Wu, H.; Xu, L.; Gong, Y.; Zhou, W. Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core–Shell Structured [email protected] Particles. Materials 2020, 13, 3341. https://doi.org/10.3390/ma13153341

AMA Style

He X, Zhou J, Jin L, Long X, Wu H, Xu L, Gong Y, Zhou W. Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core–Shell Structured [email protected] Particles. Materials. 2020; 13(15):3341. https://doi.org/10.3390/ma13153341

Chicago/Turabian Style

He, Xinfu; Zhou, Jun; Jin, Liuyan; Long, Xueying; Wu, Hongju; Xu, Li; Gong, Ying; Zhou, Wenying. 2020. "Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core–Shell Structured [email protected] Particles" Materials 13, no. 15: 3341. https://doi.org/10.3390/ma13153341

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