This study focuses on developing a facile approach to prepare biocompatible poly(vinyl alcohol) (PVA) composite hydrogels containing polydopamine particles (PDAPs) with ultrafast near‐infrared (NIR) light‐triggered shape memory and self‐healing capability. The PVA‐PDAPs composite hydrogels with excellent mechanical properties can be achieved after freezing/thawing treatment, and the formation of physically cross‐linked networks from the hydrogen bonding (H‐bonding) between PVA and PDAPs. Due to the excellent photothermal effect of polydopamine, the composited hydrogel can achieve rapid shape recovery and efficient self‐healing properties under NIR light exposure in a short time. With the excellent shape memory performance, good biocompatibility, and self‐healing property, this hydrogel should have great potential in biomedical fields such as tissue engineering, arthrodial cartilage, and artificial skin.

中文翻译：

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具有近红外光触发形状记忆和自愈能力的聚多巴胺颗粒增强聚乙烯醇水凝胶

这项研究的重点是开发一种简便的方法来制备生物相容性聚乙烯醇（PVA）复合水凝胶，该复合水凝胶包含聚多巴胺颗粒（PDAP），具有超快的近红外（NIR）光触发形状记忆和自愈能力。冷冻/解冻处理后，可以获得PVA-PDAPs复合水凝胶，具有优异的机械性能，并且可以通过PVA和PDAP之间的氢键（H键）形成物理交联的网络。由于聚多巴胺具有出色的光热效应，因此该复合水凝胶可在短时间的近红外照射下实现快速的形状恢复和有效的自愈性能。具有出色的形状记忆性能，良好的生物相容性和自我修复性能，