Blocking chemical warfare agent simulants by graphene oxide/polymer-based membrane with hydrogen bonding and molecular size sieving
발표자
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초록
내용
Chemical warfare agents (CWAs) cause death by contact with the skin or respiration. Research on the detoxification of CWAs is intensive, but that on the blocking the penetration of CWAs are uncommon. CWAs move mainly by diffusion and have hydrogen bonding sites. Therefore, hydrogen bonding and diffusion pathways are important for blocking CWAs. In this study, using linear polyethylenimine (LPEI) and graphene oxide (GO), a multilayer thin film is simply fabricated through a spray-assisted Layer-by-Layer (LbL) assembly method. Since the morphology of the LPEI chain can change depending on the pH, the LPEI and GO could be densely arranged. In addition, LPEI and GO act as a hydrogen bonding sites. The protection efficiency of the membrane was conducted by using dimethyl methylphosphonate, a nerve agent simulant, and a vial-in-vial permeation system. This membrane shows outstanding protection performance due to the narrow pathways and hydrogen bonding sites.