Nanostructured Polymer Membranes for Chemical Protective Clothing
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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A series of materials were evaluated for their potential use as breathable high water transport barriers low chemical agent transport for military and civilian protective clothing apparel. The vapor transmission rates and effective permeabilities of water and dimethyl methyl phosphonate DMMP, simulant for chemical agent Sarin through commercial and experimental polymeric membranes were measured using a modified ASTM method E-96-95. A variety of different materials from different companies were examined, unfortunately some can not be named due to proprietary restrictions. Materials examined included expanded PTFE, Nafion 117registered, sulfonated polystyrene- polyethylene-ran- polybutylene- polystyrene, sulfonated polystyrene- polyisobutylene- polystyrene, as well as four experimental and commercial membranes A, B, C, and D. Results demonstrate that laminated membrane A had the highest breathability effective permeability of water vapor, however experimental laminated material C possessed the highest selectivity with sufficient breathability, where selectivity is defined as the ratio of water permeability to DMMP permeability. Based on the results from this study, material C presents the greatest potential for a breathable barrier material for a chemical protective clothing application.
- Chemical, Biological and Radiological Warfare
- Protective Equipment