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Reversibly Compressible Supramolecular Aerogels with Low Density and Sound Insulation Performance
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2022-08-10 , DOI: 10.1002/admi.202200935 Yong Chen 1 , Yuangang Li 1 , Huajing Li 1 , Minghua Liu 2
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2022-08-10 , DOI: 10.1002/admi.202200935 Yong Chen 1 , Yuangang Li 1 , Huajing Li 1 , Minghua Liu 2
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It is still a great challenge for supramolecular materials to be used as polymer systems. Here, reversibly compressible supramolecular aerogels with low density and sound insulation performance are reported, which are exclusively composed of small molecules. It is found that the mixture of melamine and isonicotinic acid can form supramolecular hydrogel. Then it could be transformed into aerogel via a simple freeze-drying method to allow gas to replace the position of water in the 3D network skeleton pores of the hydrogel. This supramolecular aerogel is characterized of low density (1.2 mg cm-3), high porosity (99.9%), and no volume shrinkage. In addition, the supramolecular aerogel exhibits intrinsically elastic and strong fatigue resistance under compress loading/unloading cycles. The mechanical efficiency of the supramolecular aerogel can be maintained in a wide density range without significant stiffness degradation. Remarkably, such supramolecular aerogel can be used as a sound insulator and exhibits a good sound insulation performance. Compared with the polymeric foam insulation materials, the supramolecular aerogel is environmentally friendly, easy to be fabricated and disposed. This work demonstrates the fabrication of supramolecular aerogel and expands the application of self-assembled supramolecular materials.
中文翻译：
具有低密度和隔音性能的可逆压缩超分子气凝胶
将超分子材料用作聚合物体系仍然是一个巨大的挑战。在这里，报道了具有低密度和隔音性能的可逆压缩超分子气凝胶，它完全由小分子组成。发现三聚氰胺和异烟酸的混合物可以形成超分子水凝胶。然后可以通过简单的冷冻干燥方法将其转化为气凝胶，让气体取代水凝胶 3D 网络骨架孔中水的位置。这种超分子气凝胶的特点是密度低（1.2 mg cm -3)、高孔隙率 (99.9%)、无体积收缩。此外，超分子气凝胶在压缩加载/卸载循环下表现出固有的弹性和强的抗疲劳性。超分子气凝胶的机械效率可以保持在很宽的密度范围内，而不会出现明显的刚度退化。值得注意的是，这种超分子气凝胶可用作隔音材料，并表现出良好的隔音性能。与高分子泡沫保温材料相比，超分子气凝胶环保、易于制作和处置。该工作展示了超分子气凝胶的制备，拓展了自组装超分子材料的应用。
更新日期：2022-08-10
中文翻译：
具有低密度和隔音性能的可逆压缩超分子气凝胶
将超分子材料用作聚合物体系仍然是一个巨大的挑战。在这里，报道了具有低密度和隔音性能的可逆压缩超分子气凝胶，它完全由小分子组成。发现三聚氰胺和异烟酸的混合物可以形成超分子水凝胶。然后可以通过简单的冷冻干燥方法将其转化为气凝胶，让气体取代水凝胶 3D 网络骨架孔中水的位置。这种超分子气凝胶的特点是密度低（1.2 mg cm -3)、高孔隙率 (99.9%)、无体积收缩。此外，超分子气凝胶在压缩加载/卸载循环下表现出固有的弹性和强的抗疲劳性。超分子气凝胶的机械效率可以保持在很宽的密度范围内，而不会出现明显的刚度退化。值得注意的是，这种超分子气凝胶可用作隔音材料，并表现出良好的隔音性能。与高分子泡沫保温材料相比，超分子气凝胶环保、易于制作和处置。该工作展示了超分子气凝胶的制备，拓展了自组装超分子材料的应用。
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