期刊
CHEMICAL ENGINEERING JOURNAL
卷 430, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.133081
关键词
Self-healable polyurethane elastomer; Phenolic carbamate bond; Bisphenol AF; Triboelectric nanogenerators
资金
- National Natural Science Foundation of China [21991123, 52073049, 52173117]
- Shanghai Rising-Star Program [21QA1400200]
- Natural Science Foundation of Shanghai [20ZR1402500]
- Belt & Road Young Scientist Exchanges Project of Science and Technology Commission Foundation of Shanghai [20520741000]
- Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-dimension Materials (Donghua University) [18520750400]
- Science and Technology Commission of Shanghai Municipality [20DZ2254900, 20DZ2270800]
- Fundamental Research Funds for the Central Universities [2232021G-02]
- DHU Distinguished Young Professor Program [LZA2019001]
Researchers have successfully prepared a series of self-healable thermosetting PU elastomers by introducing different bisphenol chain extenders. The self-healing efficiency of PU-BPA was 95% after thermal treatment, while PU-BPAF showed improved self-healing efficiency of 100% and better self-cleaning ability, demonstrating great potential for flexible electronic devices.
Self-healable polyurethanes (PUs) containing reversible dynamic bonds have been widely recognized and rapidly developed in recent years. Because the self-heal capability and mechanical properties of materials are mutually exclusive in nature, it is still a formidable challenge to design a highly efficient self-healable and robust PUs, especially in wearable electronics field. Herein, a series of self-healable thermosetting PU elastomer based on widely used phenolic urethane bond was prepared to achieve above requirements. In order to investigate the effect of introducing different bisphenol chain extenders into the hard segment domain on the dissociation temperature of phenolic carbamate bond, both bisphenol A (BPA) and bisphenol AF (BPAF) were used to synthesize thermosetting PU elastomers (PU-BPA and PU-BPAF). The healing efficiency of PU-BPA was 95% with a thermal treatment at 100 degrees C for 1 h, and its initial dissociation temperature was 90 degrees C. Due to the presence of trifluoromethyl (-CF3) group, the thermal self-healing efficiency of PU-BPAF was improved, which could be completely healed (100%) at the same conditions and its initial dissociation temperature was reduced to 80 degrees C. PU-BPAF were used to prepare a self-healable triboelectric nanogenerator (SH-TENG) to convert mechanical movements into electrical energy that can be applied to next-generation wearable devices.Their measured open circuit voltage, short circuit current, short-circuit charge quantity were 240 V, 2.20 mu A, 20 nC, respectively. In addition, the PU-BPAF based SH-TENG exhibited better self-cleaning ability (83%) than that of PU-BPA elastomer, which was attributed to the introduction of trifluoromethyl reducing the surface energy of the material. Consequently, PU-BPAF showed great potentials as a self-healable and stretchable conductor to be applied to flexible electronic devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据