School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai201418, P. R. China.
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai201418, P. R. China.
ACS Appl Mater Interfaces. 2023 Feb 15;15(6):8462-8470. doi: 10.1021/acsami.2c20319. Epub 2023 Feb 3.
In many animals, tough skeletal muscle contraction occurs, producing a strong force through myofilaments attaching to and sliding on fibrous actin filaments. In contrast, the strength of typical synthetic hydrogels is facilitated mainly by polymeric chains. We propose a strategy for developing strong and tough hydrogels in which the side groups on polymeric chains strongly interact with dispersing medium. The hydrogels are fabricated with a polyacrylamide-alginate double network in a choline chloride saturated solution. The hydrogels are not only highly transparent, tough, fatigue-resistant, self-recovering, self-healing, and adhesive but also water-retentive, antifreezing, and conductive. The hydrogels are strengthened by hydrogen bonds in dispersing medium with a clathrate framework structure. This work may inspire the development of tough and conductive gels for applications of e-skins, soft robots, and intelligent devices.
在许多动物中，坚硬的骨骼肌收缩发生，通过肌球蛋白丝附着在纤维状肌动蛋白丝上并滑动产生强大的力。相比之下，典型的合成水凝胶的强度主要是通过聚合物链来实现的。我们提出了一种开发强韧水凝胶的策略，其中聚合物链上的侧基与分散介质强烈相互作用。水凝胶是在氯化胆碱饱和溶液中用聚丙烯酰胺-海藻酸钠双网络制成的。这些水凝胶不仅高度透明、坚韧、耐疲劳、可自我恢复、自我修复和具有粘附性，而且还具有保水性、抗冻性和导电性。水凝胶在具有笼状结构的分散介质中通过氢键得到增强。这项工作可能会激发用于电子皮肤、软体机器人和智能设备的坚韧和导电凝胶的发展。
