A Universal Strategy for Tough Adhesion of Wet Soft Material
A Universal Strategy for Tough Adhesion of Wet Soft Material
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湿软材料强粘合的通用策略
DOI：
10.1002/adfm.202003207
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发表时间：
2020-09-01
影响因子：
19
通讯作者：
Lu, Tongqing
中科院分区：
文献类型：
--
作者：
Gao, Yang;Chen, Jiaojiao;Lu, Tongqing
以简单和通用的方式实现水凝胶和各种材料之间的粘合是具有挑战性的。现有的方法依赖于水凝胶和粘附体的特殊化学或物理性质，这导致有限的适用性和复杂的预处理。这里提出了一种缝合键合策略，通过引入具有多功能官能团的聚合物链和受邻苯二酚化学启发的可交联性能。聚合物链可以通过与预先存在的水凝胶网络形成拓扑缠结的网络来缝合水凝胶，并通过多种化学相互作用直接结合到粘附体表面。通过这一点，聚合物链溶液作为一种通用胶，用于水凝胶与各种基材如金属、玻璃、弹性体、塑料和活组织的容易粘附，而不需要对水凝胶和粘附体进行任何化学设计或预处理。聚丙烯酰胺水凝胶与各种基材之间的粘附能可达200-400 J m−2，增韧聚丙烯酸聚丙烯酰胺水凝胶的粘附能可达900 J m−2。通过对各种影响因素的研究，阐明了针脚式键合策略的机理。
Achieving adhesion between hydrogels and diverse materials in a facile and universal way is challenging. Existing methods rely on special chemical or physical properties of the hydrogel and adherends, which lead to limited applicability and complicated pretreatments. A stitch‐bonding strategy is proposed here by introducing a polymer chain with versatile functional group and triggerable crosslinking property inspired by catechol chemistry. The polymer chain can stitch the hydrogel by forming a network in topological entanglement with the preexisting hydrogel network, and directly bond to the adherend surface by versatile chemical interactions. Through this, the polymer chain solution works as a universal glue for facile adhesion of hydrogels to diverse substrates like metals, glasses, elastomers, plastics, and living tissues, without requiring any chemical design or pretreatment for the hydrogel and adherends. The adhesion energy between polyacrylamide hydrogel and diverse substrates can reach 200–400 J m−2, and it can reach ≈900 J m−2 with a toughened polyacrylic acid polyacrylamide hydrogel. The mechanism of stitch‐bonding strategy is illustrated by studying various influence factors.