Research Centre for Smart Wearable Technology, Institute of Textiles and Clothing , The Hong Kong Polytechnic University , Kowloon 999077 , Hong Kong SAR.
U.S. Army Combat Capabilities Development Command Chemical Biological Center , 8198 Blackhawk Road , Aberdeen Proving Ground , Maryland 21010 , United States.
J Am Chem Soc. 2019 Oct 2;141(39):15626-15633. doi: 10.1021/jacs.9b07301. Epub 2019 Sep 18.
Organophosphonate-based nerve agents, such as VX, Sarin (GB), and Soman (GD), are among the most toxic chemicals to humankind. Recently, we have shown that Zr-based metal-organic frameworks (Zr-MOFs) can effectively catalyze the hydrolysis of these toxic chemicals for diminishing their toxicity. On the other hand, utilizing these materials in powder form is not practical, and developing scalable and economical processes for integrating these materials onto fibers is crucial for protective gear. Herein, we report a scalable, template-free, and aqueous solution-based synthesis strategy for the production of Zr-MOF-coated textiles. Among all MOF/fiber composites reported to date, the MOF-808/polyester fibers exhibit the highest rates of nerve agent hydrolysis. Moreover, such highly porous fiber composites display significantly higher protection time compared to that of its parent fabric for a mustard gas simulant, 2-chloroethyl ethyl sulfide (CEES). A decreased diffusion rate of toxic chemicals through the MOF layer can provide time needed for the destruction of the harmful species.
有机膦基神经毒剂，如 VX、沙林（GB）和梭曼（GD），是对人类毒性最强的化学物质之一。最近，我们已经证明，基于锆的金属有机骨架（Zr-MOF）可以有效地催化这些有毒化学物质的水解，从而降低其毒性。另一方面，将这些材料以粉末形式使用并不实际，开发可扩展和经济的工艺将这些材料整合到纤维上对于防护装备至关重要。在此，我们报告了一种可扩展的、无模板的、基于水溶液的合成策略，用于生产 Zr-MOF 涂层纺织品。在迄今为止报道的所有 MOF/纤维复合材料中，MOF-808/聚酯纤维表现出最高的神经毒剂水解速率。此外，与母体织物相比，这种高多孔纤维复合材料对模拟芥子气的 2-氯乙基乙基硫醚（CEES）显示出显著更高的保护时间。通过 MOF 层的有毒化学物质扩散率降低可以为破坏有害物种提供所需的时间。
