Nanocomposite hydrogels (NCs) with mechanical properties suitable for a diverse range of applications can be made by combining polymer hydrogel networks with various inorganic nanoparticles. However, the mechanical properties and functions of conventional NCs are seriously limited by the poor structural or functional tunability of common nanofillers and by the low amounts of such fillers that can be added. Here, the fabrication of novel elastically stretchable and compressible nanocomposite hydrogels (MIL-101-MAAm/PAAm) with a distinctive pearl-net microstructure and a metal-organic framework (MOF) content in the range of 20-60 wt% through post-synthetic polymerization (PSP) is reported. The MOFs, which are compatible with polymers and have a high degree of modifiability in structure and functions, are used as nanofillers. Such MOF-laden hydrogels can withstand 500% tensile strain or 90% compressive strain without fracture and recover quickly upon unloading. They are also resistant to freezing at -25 °C. In addition, the problems associated with poor flexibility and processability of MOFs are overcome by the hybridization of hydrogel polymer matrices with MOFs. The results of this work not only provide a new perspective on preparing NCs but also indicate a promising path for applying MOFs in flexible devices.

中文翻译：

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新型弹性可拉伸的金属有机骨架负载水凝胶，具有珍珠网微结构和通过后合成聚合抗冻性。

通过将聚合物水凝胶网络与各种无机纳米粒子相结合，可以制造出具有适合各种应用的机械性能的纳米复合水凝胶（NCs）。但是，常规NC的机械性能和功能受到普通纳米填料不良的结构或功能可调性以及可添加的此类填料数量的限制。在这里，新型的可弹性拉伸和压缩的纳米复合水凝胶（MIL-101-MAAm / PAAm）的制备具有独特的珍珠网微结构和金属有机骨架（MOF）含量，经过后期处理，其含量范围为20-60 wt％报告了合成聚合（PSP）。与聚合物相容并在结构和功能上具有高度可修饰性的MOF用作纳米填料。此类装有MOF的水凝胶可承受500％的拉伸应变或90％的压缩应变而不会破裂，并且在卸载后可快速恢复。它们还可以抵抗-25°C的冷冻。另外，通过水凝胶聚合物基质与MOF的杂交克服了与MOF的柔韧性和可加工性有关的问题。这项工作的结果不仅为制备NC提供了新的视角，而且为将MOF应用到柔性设备中提供了一条有希望的途径。