Abstract
Dynamically crosslinked materials generally lose their self-healing ability and mechanical robustness in aqueous, acidic, and basic environments due to disruption of their dynamic interactions and bonds. Herein, a micelle-like structure with a hydrophobic outer layer is used to protect ionic interactions. This structure ensures the self-healing and long-term stability of the ionically crosslinked elastomers in aqueous, acidic, and basic environments. The elastomer possesses a tensile strength of 6.7 MPa and a strain at break of 1400%, which is superior to the existing waterproof self-healing elastomers. The strain sensors and dielectric actuators based on the elastomer are highly stable and self-healable, even in extremely harsh environments. This design strategy of hydrophobic protection for dynamic interactions is quite general, allowing it to be extended to other self-healing materials.
摘要
动态交联材料通常在水、 酸和碱性环境中失去自愈能力和机械稳定性, 因为这些因素会破坏动态相互作用和动态键. 本文设计了一种具有疏水外层的胶束状结构来保护离子间的相互作用, 这种结构使离子交联弹性体在水、 酸和碱性环境中具有自愈能力和长期稳定性. 此外, 该弹性体的拉伸强度为6.7 MPa, 断裂应变为1400%, 优于现有的防水自愈弹性体. 结合这些优点, 基于弹性体的应变传感器和介电弹性体致动器即使在极端恶劣的环境中也具有高度稳定性和自修复性. 针对动态相互作用设计疏水保护的策略是非常普遍的, 因此可以推广到其他自愈材料.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51873110 and 51673120), State Key Laboratory of Polymer Materials Engineering (sklpme2019-2-14) and the Fundamental Research Funds for Central Universities.
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Zhang L designed and engineered the samples; Zhang L and Xiong H performed the experiments; Zhang L wrote the paper with support from Wu J. All authors contributed to the general discussion.
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The authors declare no competing financial interests.
Linjun Zhang received his bachelor’s degree from the College of Polymer Science and Engineering at Sichuan University in 2015 and MS degree from the Academy of Aerospace Soild Propulsion Technology in 2018. He is currently pursuing his PhD at Sichuan University, under the supervision of Prof. Wu. His research interests are focused on the design and preparation of self-healing elastomeric materials and functional elastomeric composites.
Jinrong Wu is a Professor in the college of Polymer Science and Engineering at Sichuan University. He received his bachelor’s degree and doctoral degree in 2003 and 2008 respectively from the College of Polymer Science and Engineering, Sichuan University. He studied at Texas Tech University as a visiting student from 2007 to 2008 and at Harvard University as a visiting scholar from 2014 to 2016. His current research involves high-performance elastomers, functional elastomers, self-healing elastomers and related theoretical problems of elastomer materials.
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Constructing hydrophobic protection for ionic interactions toward water, acid, and base-resistant self-healing elastomers and electronic devices, approximately 3.71 MB.
Supplementary material, approximately 3.71 MB.
Supplementary material, approximately 3.71 MB.
Supplementary material, approximately 3.71 MB.
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Zhang, L., Xiong, H., Wu, Q. et al. Constructing hydrophobic protection for ionic interactions toward water, acid, and base-resistant self-healing elastomers and electronic devices. Sci. China Mater. 64, 1780–1790 (2021). https://doi.org/10.1007/s40843-020-1558-6
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DOI: https://doi.org/10.1007/s40843-020-1558-6