Permeation dynamics of dimethyl methylphosphonate through polyelectrolyte composite membranes by in-situ Raman spectroscopy
Permeation dynamics of dimethyl methylphosphonate through polyelectrolyte composite membranes by in-situ Raman spectroscopy
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DOI：
10.1016/j.memsci.2019.117462
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发表时间：
2020-02
影响因子：
9.5
通讯作者：
Jonathan Colón-Ortiz;P. Ramesh;G. Tsilomelekis;A. Neimark
中科院分区：
文献类型：
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作者：
Jonathan Colón-Ortiz;P. Ramesh;G. Tsilomelekis;A. Neimark
可靠地测量膜对不同化合物的渗透性对于设计用于选择性分离、化学战剂和有毒工业化学品的防护屏障的新型材料至关重要。设计了一种原始的原位拉曼光谱实验装置，以测量毒素渗透的动力学，以神经毒剂替代物甲基膦酸二甲酯 (DMMP) 穿过聚电解质复合膜的扩散为例。该方法的效率在两种类型的商用膜（Nafion 117 和 Nexar MD9200）上得到了证明，并用金属氧化物纳米颗粒进行了改性。研究发现，用 ZnO 纳米粒子负载膜可显着减少药剂渗透，增强其针对有害物质的防护能力。所提出的方法可用于表征其他类型的 CWA、其模拟物和其他化学品通过不同来源的聚合物膜的渗透性。
Reliable measurement of permeability of membranes with respect of different chemical compounds is of paramount importance for the design of novel materials for selective separations, protective barriers against chemical warfare agents and toxic industrial chemicals. An originalin-situRaman spectroscopy experimental setup is devised to measure the dynamics of permeation of toxins with example of diffusion of dimethyl methylphosphonate (DMMP), a nerve agent surrogate, across polyelectrolyte composite membranes. Efficiency of the proposed method is demonstrated on two types of commercial membranes, Nafion 117 and Nexar MD9200, modified with metal oxide nanoparticles. It was found that loading membranes with ZnO nanoparticles significantly reduces agent permeation, enhancing its protective capabilities against hazardous substances. The proposed methodology can be adopted and applied for characterization of permeability of other types of CWAs, their simulants, and other chemicals through polymeric membranes of different origin.