Chemistry Division, Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, D.C., 20375, USA.
Macromol Rapid Commun. 2018 Jun;39(12):e1800194. doi: 10.1002/marc.201800194. Epub 2018 May 22.
The threat of chemical warfare agents (CWA) compels research into novel self-decontaminating materials (SDM) for the continued safety of first-responders, civilians, and active service personnel. The capacity to actively detoxify, as opposed to merely sequester, offending agents under typical environmental conditions defines the added value of SDMs in comparison to traditional adsorptive materials. Porous polymers, synthesized via the high internal phase emulsion (HIPE) templating, provide a facile fabrication method for materials with permeable open cellular structures that may serve in air filtration applications. PolyHIPEs comprising polydicyclopentadiene (polyDCPD) networks form stable hydroperoxide species following activation in air under ambient conditions. The hydroperoxide-containing polyDCPD materials react quickly with CWA simulants, Demeton-S and 2-chloroethyl ethyl sulfide, forming oxidation products as confirmed via gas chromatography mass spectrometry. The simplicity of the detoxification chemistry paired with the porous foam form factor presents an exciting opportunity for the development of self-decontaminating filter media.
化学战剂（CWA）的威胁促使人们研究新型自去污材料（SDM），以保障急救人员、平民和现役人员的持续安全。与传统吸附材料相比，SDM 的附加值在于其能够在典型环境条件下主动解毒，而不仅仅是隔离有害物质。通过高内相乳液（HIPE）模板合成的多孔聚合物为具有可渗透开放式细胞结构的材料提供了一种简便的制造方法，可用于空气过滤应用。在环境条件下空气中激活后，包含聚二环戊二烯（polyDCPD）网络的 PolyHIPE 形成稳定的过氧化物物种。含有过氧化物的 polyDCPD 材料与 CWA 模拟物 Demeton-S 和 2-氯乙基乙基硫醚快速反应，形成氧化产物，这通过气相色谱质谱法得到了证实。解毒化学的简单性与多孔泡沫形态因子相结合，为自去污过滤介质的开发带来了令人兴奋的机会。
