Mechanically Flexible and Weavable Hybrid Aerogel Fibers with Ultrahigh Metal–Organic Framework Loadings for Versatile Applications,ACS Applied Polymer Materials

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Mechanically Flexible and Weavable Hybrid Aerogel Fibers with Ultrahigh Metal–Organic Framework Loadings for Versatile Applications
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2024-01-24 , DOI: 10.1021/acsapm.3c02734
Junhe Duan _{1,

2} , Qin Li ₁ , Weijia Xu ₁ , Xiangning Hu ₁ , Yue Wang ₁ , Sara M. Valdez ₃ , Zhe Qiang ₃ , Yaozu Liao ₁ , Jin Wen ₁ , Changhuai Ye _{1,

2} , Meifang Zhu ₁

Affiliation

Flexible and weavable metal–organic framework (MOF)-based hybrid fibers can enable many potential applications, particularly for wearable functional devices. However, the fabrication of composite textiles with high MOF loadings, a large specific surface area, and outstanding mechanical flexibility is still very challenging. Herein, we demonstrate the preparation of mechanically strong MOF@ANF (aramid nanofiber) hybrid aerogel fibers with gradient distribution of MOF crystals along the radial direction through in situ growth of MOFs on the skeletons of three-dimensional (3D)-printed aramid nanofiber (ANF) aerogel fibers. The deprotonation of poly(p-phenylene terephthalamide) networks increases the local concentration of cobalt ions and enables the in situ growth of MOF crystals inside the ANF filaments, the mechanism of which was revealed by computational simulations. As a result, an ultrahigh ZIF-67 loading of 63.4 wt % and a large specific surface area of 756.6 m² g^–1 were achieved by the hybrid ZIF-67@ANF aerogel fibers, the highest specific surface area among macroscopic and weavable MOF-based composite fibers ever reported. These aerogel textiles show excellent mechanical flexibility and exhibit fast adsorption kinetics, high adsorption capacity, and recycling stability for addressing various hazardous pollutants, including formaldehyde vapor, heavy metal ions, and organic dyes. This work takes a further step toward wearable-MOF-based textile development for broad applications in wearable devices.

中文翻译：

具有超高金属有机框架负载的机械柔性和可编织混合气凝胶纤维，适用于多种应用

柔性、可编织的金属有机框架（MOF）混合纤维可以实现许多潜在的应用，特别是可穿戴功能设备。然而，制造具有高 MOF 负载量、大比表面积和出色的机械灵活性的复合纺织品仍然非常具有挑战性。在此，我们展示了通过在三维（3D）打印芳纶纳米纤维骨架上原位生长MOF来制备机械强度高的MOF@ANF（芳纶纳米纤维）杂化气凝胶纤维，其MOF晶体沿径向梯度分布。 ANF）气凝胶纤维。聚对苯二甲酰对苯二胺网络的去质子化增加了钴离子的局部浓度，并使 MOF 晶体能够在 ANF 丝内原位生长，其机制已通过计算模拟揭示。结果，混合ZIF- 67@ANF气凝胶纤维实现了63.4 wt%的超高ZIF- 67负载量和756.6 m ² g ^–1的大比表面积，这是宏观可编织MOF中比表面积最高的基复合纤维曾有报道。这些气凝胶纺织品表现出优异的机械灵活性，并表现出快速的吸附动力学、高吸附容量和回收稳定性，可用于处理各种有害污染物，包括甲醛蒸汽、重金属离子和有机染料。这项工作朝着基于 MOF 的可穿戴纺织品的开发迈出了进一步的一步，以在可穿戴设备中得到广泛应用。

更新日期：2024-01-24

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