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Title: Near-Instantaneously Self-Healing Coating toward Stable and Durable Electromagnetic Interference Shielding
Authors: Zou, Lihua
Lan, Chuntao
Zhang, Songlin 
Zheng, Xianhong
Xu, Zhenzhen
Li, Changlong
Yang, Li
Ruan, Fangtao
Tan, Swee Ching 
Keywords: Conductive polymer
Electromagnetic interference shielding
Multifunctional textiles
Superhydrophobic coating
Issue Date: 8-Sep-2021
Publisher: Springer Science and Business Media B.V.
Citation: Zou, Lihua, Lan, Chuntao, Zhang, Songlin, Zheng, Xianhong, Xu, Zhenzhen, Li, Changlong, Yang, Li, Ruan, Fangtao, Tan, Swee Ching (2021-09-08). Near-Instantaneously Self-Healing Coating toward Stable and Durable Electromagnetic Interference Shielding. Nano-Micro Letters 13 (1) : 190. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Durable electromagnetic interference (EMI) shielding is highly desired, as electromagnetic pollution is a great concern for electronics’ stable performance and human health. Although a superhydrophobic surface can extend the service lifespan of EMI shielding materials, degradation of its protection capability and insufficient self-healing are troublesome issues due to unavoidable physical/chemical damages under long-term application conditions. Here, we report, for the first time, an instantaneously self-healing approach via microwave heating to achieve durable shielding performance. First, a hydrophobic 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS) layer was coated on a polypyrrole (PPy)-modified fabric (PPy@POTS), enabling protection against the invasion of water, salt solution, and corrosive acidic and basic solutions. Moreover, after being damaged, the POTS layer can, for the first time, be instantaneously self-healed via microwave heating for a very short time, i.e., 4 s, benefiting from the intense thermal energy generated by PPy under electromagnetic wave radiation. This self-healing ability is also repeatable even after intentionally severe plasma etching, which highlights the great potential to achieve robust and durable EMI shielding applications. Significantly, this approach can be extended to other EMI shielding materials where heat is a triggering stimulus for healing thin protection layers. We envision that this work could provide insights into fabricating EMI shielding materials with durable performance for portable and wearable devices, as well as for human health care.[InlineMediaObject not available: see fulltext.]. © 2021, The Author(s).
Source Title: Nano-Micro Letters
ISSN: 2311-6706
DOI: 10.1007/s40820-021-00709-0
Rights: Attribution 4.0 International
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