Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core–Shell Structured PDA@TiC Particles

He, Xinfu; Zhou, Jun; Jin, Liuyan; Long, Xueying; Wu, Hongju; Xu, Li; Gong, Ying; Zhou, Wenying

doi:10.3390/ma13153341

Open AccessArticle

Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core–Shell Structured PDA@TiC Particles

by

Xinfu He

^1,2,*,

Jun Zhou

¹,

Liuyan Jin

¹,

Xueying Long

¹,

Hongju Wu

¹,

Li Xu

¹,

Ying Gong

¹ and

Wenying Zhou

^1,*

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

Submission received: 10 June 2020 / Revised: 15 July 2020 / Accepted: 20 July 2020 / Published: 27 July 2020

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Abstract

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 PDA@TiC powders were used to reinforce thermoplastic polyurethane (TPU). The results indicate that the PDA@TiC were homogenously dispersed in the matrix compared with the pristine TiC, and that the PDA@TiC/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 PDA@TiC/TPU with high permittivity but low loss will find potential applications in electronic and electrical applications.

Keywords: 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 PDA@TiC 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 PDA@TiC Particles. Materials. 2020; 13(15):3341. https://doi.org/10.3390/ma13153341

Chicago/Turabian Style

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

APA Style

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

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Improved Dielectric Properties of Thermoplastic Polyurethane Elastomer Filled with Core–Shell Structured PDA@TiC Particles

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