Feasible Detoxification Coating Material for Chemical Warfare Agents Using Poly(methyl methacrylate)–Branched Poly(ethyleneimine) Copolymer and Metal–Organic Framework Composites

Abstract

Defense against chemical warfare agents (CWAs) is regarded as a top priority for the protection of humanity, but it still depends on physical protection with severe limitations such as residual toxicity and post-treatment requirement. In this study, a strategically designed functional polymeric substrate was composited with a metal−organic framework catalyst to remove toxicity immediately. A series of PMMA-BPEI copolymers exhibited high processability as a coating and accelerated the catalytic activity of Zr(IV)-based metal−organic framework catalysts (UiO-66). Among them, PMB12_40 composite coating on a cotton fabric, containing a PMMA-BPEI copolymer (PMMA/BPEI = 1/2) and 40% of UiO-66 catalyst, can efficiently decompose nerve agent simulants (methyl-paraoxon) under both liquid phase (t 1/2 = 0.14 h) and humidified (t 1/2 = 4.8 h) conditions. Moreover, a real agent, GD, was decomposed 100% by PMB12_40 in 4 h at 25 °C and 65% relative humidity. On the basis of superior catalytic activity, the PMB composites are anticipated to be a potential material for active chemical protection coating.

MIL-101-NH2(Fe)-Coated Nylon Microfibers for Immobilized Photocatalysts in RhB and Cr(VI) Removal

“…Unfortunately, MOFs, like other powder-form catalysts, face a significant challenge with recyclability. The inevitable loss of nano-/micro-sized crystals occurs during a repetition of the filtering and washing process, which limits their practical applications. , To address this issue, researchers have explored immobilizing photocatalysts by using various supporting materials to form composites, mixed membranes, and thin films. − For high-efficiency immobilized photocatalysts, supporting materials must possess properties such as a large specific surface area, favorable photoelectric separation, and chemical inertness. , …”