Tough, Self-Healing Hydrogels Capable of Ultrafast Shape Changing.,Advanced Materials

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Tough, Self-Healing Hydrogels Capable of Ultrafast Shape Changing.
Advanced Materials ( IF 27.4 ) Pub Date : 2019-10-14 , DOI: 10.1002/adma.201904956
Zhen Jiang ₁ , Broden Diggle ₁ , India C G Shackleford ₁ , Luke A Connal ₁

Affiliation

Achieving multifunctional shape-changing hydrogels with synergistic and engineered material properties is highly desirable for their expanding applications, yet remains an ongoing challenge. The synergistic design of multiple dynamic chemistries enables new directions for the development of such materials. Herein, a molecular design strategy is proposed based on a hydrogel combining acid-ether hydrogen bonding and imine bonds. This approach utilizes simple and scalable chemistries to produce a doubly dynamic hydrogel network, which features high water uptake, high strength and toughness, excellent fatigue resistance, fast and efficient self-healing, and superfast, programmable shape changing. Furthermore, deformed shapes can be memorized due to the large thermal hysteresis. This new type of shape-changing hydrogel is expected to be a key component in future biomedical, tissue, and soft robotic device applications.

中文翻译：

具有超快形状变化能力的坚韧，自愈水凝胶。

实现具有协同和工程化材料性能的多功能可变形水凝胶对于其扩展的应用是非常理想的，但仍然是一个持续的挑战。多种动态化学的协同设计为此类材料的开发提供了新的方向。在本文中，提出了一种基于结合了酸-醚氢键和亚胺键的水凝胶的分子设计策略。这种方法利用简单且可扩展的化学物质来生产双动态水凝胶网络，该网络具有高吸水率，高强度和韧性，出色的抗疲劳性，快速有效的自修复以及超快速的可编程形状更改。此外，由于较大的热滞后，可以存储变形的形状。

更新日期：2019-11-26

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