AbstractIn 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.A versatile and simple strategy for building self-healing hydrogels with tunable mechanical properties and shape memory behavior has been developed using diethylenetriamine to crosslink polyacrylic acid chains. Hydrophobic domains form in the network in addition to ionic bonds between the amino and carboxylic acid groups. The combination of ionic bonds and hydrophobic interactions not only provides self-healing ability but also drastically improves the strength.

中文翻译：

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具有形状记忆行为的多胺诱导的自修复聚（丙烯酸）水凝胶

摘要在这项工作中，报告了一种用于构建具有可调机械性能和形状记忆行为的自修复水凝胶的通用且简单的策略。一种具有三个氨基的市售小分子二亚乙基三胺 (DETA) 通过离子键合用于交联聚丙烯酸 (PAAc) 链，PAAc 链与 DETA 的复合物在水凝胶网络中形成疏水微域。离子键和疏水相互作用的合作极大地提高了机械性能，这可以通过调整 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。物理微域交联的热响应性赋予水凝胶形状记忆行为。希望这种新颖的策略将为设计具有多种功能的高强度水凝胶提供新的机会，例如人造肌肉和皮肤。使用二亚乙基三胺交联聚丙烯酸链已开发了性能和形状记忆行为。除了氨基和羧酸基团之间的离子键之外，疏水结构域在网络中形成。离子键和疏水相互作用的结合不仅提供了自愈能力，而且大大提高了强度。例如人造肌肉和皮肤。使用二亚乙基三胺交联聚丙烯酸链开发了一种用于构建具有可调机械性能和形状记忆行为的自修复水凝胶的通用且简单的策略。除了氨基和羧酸基团之间的离子键之外，疏水结构域在网络中形成。离子键和疏水相互作用的结合不仅提供了自愈能力，而且大大提高了强度。例如人造肌肉和皮肤。使用二亚乙基三胺交联聚丙烯酸链开发了一种用于构建具有可调机械性能和形状记忆行为的自修复水凝胶的通用且简单的策略。除了氨基和羧酸基团之间的离子键之外，疏水结构域在网络中形成。离子键和疏水相互作用的结合不仅提供了自愈能力，而且大大提高了强度。