Multiamine-induced Self-healing of Poly (Acrylic Acid) Hydrogels with Shape Memory Behavior
Multiamine-induced Self-healing of Poly (Acrylic Acid) Hydrogels with Shape Memory Behavior
复制标题
多胺诱导具有形状记忆行为的聚丙烯酸水凝胶的自修复
DOI：
10.1038/s41428-018-0037-7
复制
发表时间：
2018
期刊：
影响因子：
2.8
通讯作者：
Qiao Liu
中科院分区：
文献类型：
--
作者：
Jun Lan;Xiuquan Ni;Chuanzhuang Zhao;Chongyi Chen;Qiao Liu
在这项工作中，一个通用的和简单的策略，用于构建具有可调的机械性能和形状记忆行为的自愈合水凝胶。一种可商购的具有三个氨基的小分子，二亚乙基三胺（DETA），被施加到通过离子键合交联聚（丙烯酸）（PAAc）链，并且PAAc链与DETA的复合物在水凝胶网络中形成疏水微区。离子键和疏水相互作用的合作大大提高了机械性能，这可以通过调节PAAc与DETA的摩尔比来调节。由于交联的物理相互作用，水凝胶可以在环境条件下快速自愈。物理微区交联的热响应性赋予水凝胶形状记忆行为。人们希望，这种新的策略将提供新的机会，设计高强度的水凝胶与可变功能的广泛应用，如人造肌肉和皮肤。
In this work, a versatile and simple strategy for building self-healing hydrogels with tunable mechanical properties and shape memory behavior is reported. A commercially available small molecule with three amino groups, diethylenetriamine (DETA), is applied to crosslink poly (acrylic acid) (PAAc) chains via ionic bonding, and the complexes of the PAAc chains with DETA form hydrophobic microdomains in the hydrogel network. The cooperation of ionic bonding and hydrophobic interactions drastically improves the mechanical properties, which can be modulated by adjusting the molar ratio of PAAc to DETA. Due to the physical interaction of the crosslinks, the hydrogels can self-heal rapidly in ambient conditions. The thermal responsiveness of the physical microdomain crosslinks endow the hydrogels with shape memory behavior. It is hoped that this novel strategy will provide new opportunities for the design of high-strength hydrogels with variable functionalities for a wide range of applications, such as artificial muscle and skin.