Based on thermoreversible sol–gel transitions of simple amino acid, fluorenylmethoxycarbonyl-modified phenylalanine (Fmoc-F), a hybrid double-network (DN) hydrogel, has been fabricated by combining a self-assembled Fmoc-F gel and a covalent polyacrylamide (PAAm) network. Up to 2 wt% Fmoc-F can be incorporated into DN hydrogels (90 wt% water) to form thinner and shorter nanofibers within the PAAm gel network than in pure Fmoc-F hydrogels; this indicates strong interaction between two gelators. Fmoc-F self-assembly also provides sacrificial bonding to effectively dissipate stretching energy, resulting in increased tensile modulus and yield strength of DN gels by 3437% and 737%, respectively, when compared with pure PAAm hydrogel. The relatively small increase of 133% and 177% in tensile strain and strength, respectively, of DN gels could be attributed to the time-independent discontinuous dissociation of the Fmoc-F self-assembly for energy dissipation. DN hydrogels also exhibit temperature-sensitive shape memory and self-recovery performance because of thermoreversible Fmoc-F self-assembly.

基于简单氨基酸的热可逆溶胶-凝胶转变，芴基甲氧羰基修饰的苯丙氨酸（Fmoc-F）是一种混合双网络（DN）水凝胶，通过将自组装的Fmoc-F凝胶和共价聚丙烯酰胺结合来制备。 PAAm) 网络。与纯 Fmoc-F 水凝胶相比，可将高达 2 wt% 的 Fmoc-F 掺入 DN 水凝胶（90 wt% 水）中，从而在 PAAm 凝胶网络中形成更细、更短的纳米纤维；这表明两种凝胶剂之间的强相互作用。Fmoc-F自组装还提供牺牲键合以有效耗散拉伸能量，与纯PAAm水凝胶相比，DN凝胶的拉伸模量和屈服强度分别提高了3437%和737%。拉伸应变和强度分别增加了 133% 和 177%，相对较小，DN 凝胶的数量可归因于 Fmoc-F 自组装用于能量耗散的与时间无关的不连续解离。由于热可逆的 Fmoc-F 自组装，DN 水凝胶还表现出对温度敏感的形状记忆和自恢复性能。