Kim Kyubo, Jung Heesoo, Cho Kyeong Min
Protection and Decontamination Team, Chem-Bio Technology Center, Agency for Defense Development (ADD), Daejeon 34186, Republic of Korea.
ACS Appl Mater Interfaces. 2023 Sep 6;15(35):41755-41762. doi: 10.1021/acsami.3c08964. Epub 2023 Aug 23.
Personal protective equipment against chemical warfare agents and other toxic chemicals must be protective, be breathable, and have a low thermal burden. Selectively permeable membranes are promising candidates for such equipment. In this study, a hybrid membrane consisting of a continuous and thin zeolitic imidazolate framework (ZIF)-8 layer on an oxygen-rich small-flake graphene oxide layer was produced using a simple and scalable synthesis method. The small intrinsic pores of ZIF-8 allow it to selectively separate chemicals via size exclusion while permitting water vapor to permeate out. The ZIF-8/graphene oxide membrane had high selectivity for the penetration of water vapor over nerve agent simulants (ratio of dimethyl methylphosphonate to water vapor transmittance rates of ∼312) with a high water vapor transmittance rate of 3000 g m day. This protective barrier layer is a promising material for next-generation protective clothing with enhanced comfort and operability.
针对化学战剂和其他有毒化学品的个人防护装备必须具备防护性、透气性且热负荷低。选择性渗透膜是这类装备的理想候选材料。在本研究中，通过一种简单且可扩展的合成方法制备了一种混合膜，该混合膜由在富氧小片状氧化石墨烯层上的连续且薄的沸石咪唑酯骨架（ZIF）-8层组成。ZIF-8的固有小孔使其能够通过尺寸排阻选择性地分离化学物质，同时允许水蒸气渗透出去。ZIF-8/氧化石墨烯膜对水蒸气透过神经毒剂模拟物具有高选择性（甲基膦酸二甲酯与水蒸气透过率之比约为312），水蒸气透过率高达3000 g m⁻² day⁻¹。这种防护阻挡层是用于下一代防护服的有前景的材料，可增强舒适性和可操作性。
