Quickly self-healing hydrogel at room temperature with high conductivity synthesized through simple free radical polymerization |
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Authors: | Lipei Yue Xiaoyong Zhang Weidong Li Ying Tang Yongping Bai |
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Affiliation: | 1. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150000, People's Republic of China;2. Wuxi HIT New Material Research Institute, Wuxi 214000, People's Republic of China;3. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China |
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Abstract: | The use of conductive self-healing hydrogels in electronic devices not only reduces replacement and maintenance costs but also prolongs their lifetime. Therefore, developing hydrogels with autonomous self-healing properties and electronic conductivity is vital for the advancement of emerging fields, such as conductors, semiconductors, sensors, artificial skin, and electrodes and solar cells. However, it remains a challenge to fabricate a hydrogel with high conductivity that can be healed quickly at room temperature without any external stimulus. In this work, we report an effective and simple free radical polymerization approach to synthesizing a hydrogel using modified rGO and acrylate monomers containing abundant ion groups. The hydrogel exhibits excellent electronic conductivity, extremely fast electronic self-healing ability, and excellent repeatable restoration performance at 25 °C. The conductivity of the hydrogel reaches 27.2 S/m, the hydrogel recovers its original shape, and scoring scratched on the surface totally disappears after holding at 25 °C for 40 s. This conductive, room-temperature self-healing hydrogel takes unique advantage of supramolecular chemistry and polymer nanoscience and has potential applications in various fields such as self-healing electronics, artificial skin, soft robotics, biomimetic prostheses, and energy storage. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47379. |
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Keywords: | conducting polymers copolymers hydrophilic polymers polyesters synthesis and processing techniques |
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