Seo Jin Young, Song Younghan, Lee Jung-Hyun, Kim Hyungsup, Cho Sangho, Baek Kyung-Youl
Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
Department of Chemical and Biological Engineering, Korea University, Seoul 136-713, Republic of Korea.
ACS Appl Mater Interfaces. 2021 Jul 21;13(28):33516-33523. doi: 10.1021/acsami.1c08138. Epub 2021 Jul 8.
Environment-friendly and robust nanocellulose/metal-organic framework aerogel composites were prepared for effective detoxification of chemical warfare agent simulants both in static and dynamic continuous flow systems. For this, we fabricated a durable porous composite of the UiO-66 catalyst and TEMPO-oxidized cellulose nanofibers (TOCN) to examine as a detoxification filter. Even with over 50 wt % UiO-66, the obtained cellulose aerogel composites exhibited high stability without leaking of UiO-66 for 4 weeks under an aqueous state. The cellulose aerogel composite with 54 wt % UiO-66 showed a quite high surface area (483 m g) despite the presence of TOCN, which caused fast degradation of methyl paraoxon (MPO), a nerve agent simulant, with a 0.7 min half-life in an aqueous solution with -ethylmorpholine buffer. This aerogel composite was then examined as the detoxification filter in the continuous flow system under a 7.2 mL h flow rate, which surprisingly decomposed 53.7 g of MPO within 1 h with 1 m of the effective area.
制备了环境友好且坚固的纳米纤维素/金属有机框架气凝胶复合材料，用于在静态和动态连续流动系统中有效解毒化学战剂模拟物。为此，我们制备了一种由UiO-66催化剂和TEMPO氧化纤维素纳米纤维（TOCN）组成的耐用多孔复合材料，作为解毒过滤器进行研究。即使含有超过50 wt%的UiO-66，所得的纤维素气凝胶复合材料仍表现出高稳定性，在水相中4周内无UiO-66泄漏。含有54 wt% UiO-66的纤维素气凝胶复合材料尽管存在TOCN，但仍具有相当高的比表面积（483 m²/g），这使得神经毒剂模拟物甲基对硫磷（MPO）在含有N-乙基吗啉缓冲液的水溶液中快速降解，半衰期为0.7分钟。然后在7.2 mL/h的流速下，将这种气凝胶复合材料作为解毒过滤器在连续流动系统中进行测试，令人惊讶的是，在有效面积为1 m²的情况下，1小时内可分解53.7 g的MPO。
