State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textile, Donghua University, Shanghai 201620, China.
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textile, Donghua University, Shanghai 201620, China; Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China.
J Colloid Interface Sci. 2021 Jan 15;582(Pt A):387-395. doi: 10.1016/j.jcis.2020.08.020. Epub 2020 Aug 8.
Nanofiber-structured hydrogels with robust mechanical properties are promising candidates for the development of multifunctional materials in advanced fields. However, creating such materials that combine the virtues of high elongation, robust strength, and good elasticity remains an enormous challenge. Here, we demonstrate a nature-inspired methodology to fabricate dermis-mimicking network structured electrospun nanofibrous hydrogels with robust mechanical properties by combining the advantages of sustainable plant-based zein and elastic waterborne polyurethane (WPU). The reversible hydrogen bonding and strong covalent bonding between zein and WPU molecules are constructed in the double-network (DN) structured nanofibrous hydrogels (NFHs) with tunable stretchability and strength. The resulting NFHs exhibit the integrated characteristics of a stretch of 683%, a fracture strength of 6.5 MPa, a toughness of 20.7 MJ m, and complete recovery from large deformation. This nature-inspired structural design strategy may pave the way for designing mechanically robust nanofibrous hydrogels in structurally adaptive and scalable form.
具有强韧机械性能的纳米纤维结构水凝胶有望成为先进领域多功能材料发展的候选材料。然而，开发兼具高拉伸性、强韧性和良好弹性的此类材料仍然是一个巨大的挑战。在这里，我们展示了一种受自然启发的方法，通过结合可持续的植物源性玉米醇溶蛋白和弹性水性聚氨酯（WPU）的优势，制备具有强韧机械性能的仿真皮网络结构静电纺纳米纤维水凝胶。玉米醇溶蛋白和 WPU 分子之间的可逆氢键和强共价键在具有可调拉伸性和强度的双网络（DN）结构纳米纤维水凝胶（NFHs）中构建。所得到的 NFHs 表现出 683%的拉伸率、6.5 MPa 的断裂强度、20.7 MJ m 的韧性以及从大变形中完全恢复的综合特性。这种受自然启发的结构设计策略可能为设计机械强韧的纳米纤维水凝胶铺平道路，使其以结构自适应和可扩展的形式存在。
