Open Access

ARTICLE

BaTiO₃/Polyurethane Dielectric Composites with Diels-Alder Bond for Improved Self-Healing Properties

by Junlong Yao^1,2, Wei Nie¹, Zhengguang Sun², Huan Yang^1,3,*, Yu Guan¹, Lin Gao⁴, Xueliang Jiang¹, Mujie Guo¹, Chuanxi Xiong^5,*

1 Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
2 Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan, 430062, China
3 Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Wuhan Institute of Technology, Wuhan, 430205, China
4 School of Chemistry and Environmental Engineering, Jianghan University, Wuhan, 430056, China
5 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China

* Corresponding Authors: Huan Yang. Email: ; Chuanxi Xiong. Email:

(This article belongs to the Special Issue: Advanced Renewable Energy Storage Materials and Their Composite: Preparation, Characterization and Applications)

Journal of Renewable Materials 2022, 10(9), 2355-2364. https://doi.org/10.32604/jrm.2022.019339

Received 18 September 2021; Accepted 25 October 2021; Issue published 30 May 2022

Abstract

In general, self-healing dielectric composites are mainly composed of polar hydrogen bonds, which have high hydrophilicity and are unsuitable for humid environment. Dielectric composite with Diels-Alder (D-A) bond contains covalent bonds, it can be adopted as an efficient self-healing material. Here, we construct self-healing barium titanate (BT)/polyurethane (PU) dielectric composites by adopting PU with D-A bond as matrix (BT/ PU-DA). The prepared 10% BT/PU-DA composite exhibits superior self-healing ability than that of PU-DA. Moreover, its dielectric constant can reach 9.3 with a loss of only 0.04 at 1000 Hz and maintain 93% repair effi- ciency of tensile strength. The experimental analysis suggests the introduction of D-A bond can enhance the thermostability and self-healing ability of BT/PU-DA composite. In addition, the incorporation of BT nanoparticles and D-A bond in the self-healing composite contributes to the lower dielectric loss and excellent tensile strength after healing. The adopted strategy is a promising and facile approach to develop highly efficient self-healing dielectric material, which will be conducive to reuse and sustainable development of the electronic packaging material in aqueous medium or wet environment.

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Keywords

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