Photothermal effect induced self-healing and Raman spectrum change of the pyridine–Cu dynamic bond in the process of self-healing. (IMAGE)
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A NIR fast self-healing and high-performance metallosupramolecular elastomer is prepared by introducing pyridine-Cu coordination bond with photothermal effect into polyacrylate. Pyridine-Cu stickers are formed in the elastomer, which restricts the reptation mode but has little effect on local segmental motion. Meanwhile, pyridine-Cu absorbs NIR, which makes the surface temperature rise rapidly to the sticker’s dissociation temperature so that the damage can be healed in 2 min. Specially, the damage and healing processes could be monitored by laser confocal micro-Raman spectroscopy, providing an insight into the underlying of damage-restoring mechanism.
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