Jiang Nan, Liu Hongyan, Zhao Guodong, Li Heyi, Yang Shuo, Xu Xianlin, Zhuang Xupin, Cheng Bowen
State Key Laboratory of Separation Membranes and Membrane Processes, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, PR China.
School of Materials Science and Engineering, Tiangong University, Tianjin 300387, PR China.
J Colloid Interface Sci. 2023 Jun 15;640:192-198. doi: 10.1016/j.jcis.2023.02.105. Epub 2023 Feb 24.
Protective fabrics containing Zr-Based Metal-Organic Frameworks (Zr-MOFs) show great potential in the detoxification of chemical warfare agents (CWAs). However, the current studies still face the challenges of complicated fabrication processes, limited MOF loading mass, and insufficient protection. Herein, we developed a lightweight, flexible and mechanical robust aerogel by in situ growth of UiO-66-NH onto aramid nanofibers (ANFs) and assembly of UiO-66-NH loaded ANFs (UiO-66-NH@ANFs) into 3D hierarchically porous architecture. The UiO-66-NH@ANF aerogels feature high MOF loading of 261 %, high surface area of 589.349 m g, open and interconnected cellular structure, which provide efficient transfer channels and promote catalytic degradation of CWAs. As a result, the UiO-66-NH@ANF aerogels demonstrate high 2-chloroethyl ethyl thioether (CEES) removal rate at 98.9 % and a short half-life of 8.15 min. Moreover, the aerogels present good mechanical stability (recovery rate of 93.3 % after 100 cycles under 30 % strain), low thermal conductivity (λ of 25.66 mW m K), high flame resistance (LOI of 32 %) and good wearing comfortableness, indicating promising potential in multifunctional protection against CWAs.
含有锆基金属有机框架（Zr-MOFs）的防护织物在化学战剂（CWA）解毒方面显示出巨大潜力。然而，目前的研究仍面临制造工艺复杂、MOF负载质量有限和防护不足等挑战。在此，我们通过在芳纶纳米纤维（ANFs）上原位生长UiO-66-NH，并将负载UiO-66-NH的ANFs（UiO-66-NH@ANFs）组装成三维分级多孔结构，制备了一种轻质、柔性且机械性能稳健的气凝胶。UiO-66-NH@ANF气凝胶具有261%的高MOF负载量、589.349 m²/g的高比表面积、开放且相互连接的孔结构，这些特性提供了高效的传输通道并促进了CWA的催化降解。结果，UiO-66-NH@ANF气凝胶对2-氯乙基乙硫醚（CEES）的去除率高达98.9%，半衰期短至8.15分钟。此外，该气凝胶具有良好的机械稳定性（在30%应变下100次循环后恢复率为93.3%）、低导热率（λ为25.66 mW·m⁻¹·K⁻¹）、高阻燃性（极限氧指数为32%）和良好的穿着舒适性，表明其在CWA多功能防护方面具有广阔的应用前景。
