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

    Junlong Yao1,2, Wei Nie1, Zhengguang Sun2, Huan Yang1,3,*, Yu Guan1, Lin Gao4, Xueliang Jiang1, Mujie Guo1, Chuanxi Xiong5,*

    Journal of Renewable Materials, Vol.10, No.9, pp. 2355-2364, 2022, DOI:10.32604/jrm.2022.019339

    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… More >

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