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Selective rejection of a water-soluble nerve agent stimulant using a nanoporous lyotropic liquid crystal–butyl rubber vapor barrier material: Evidence for a molecular size-discrimination mechanism by Xiaoyun Lu; Vinh Nguyen; Xiaohui Zeng; Brian J. Elliott; Douglas L. Gin is a Engineering article available to read on EtoBox.

What is Selective rejection of a water-soluble nerve agent stimulant using a nanoporous lyotropic liquid crystal–butyl rubber vapor barrier material: Evidence for a molecular size-discrimination mechanism about?

The selective vapor rejection performance of a "breathable", cross-linked lyotropic liquid crystal (LLC)-butyl rubber (BR) composite membrane with a type I bicontinuous cubic (Q I ) morphology was studied for a water-soluble chemical nerve agent simulant, dimethyl methylphosphonate (DMMP). The thickness-normalized DMMP vapor flux of this nanoporous Q I -phase LLC-BR membrane, which has a 3D interconnected water nanopore network, was found to be (2.5 ± 0.4) × 10 1 g m -2 day -1 m with a driving force of 0.333 torr at 25 • C. This DMMP vapor penetration level is the same low level as that observed for dense, cross-linked BR films under the same testing conditions. This LLC-BR material also has a very high thickness-normalized water vapor flux ((5.9 ± 0.3) × 10 3 g m -2 day -1 m at 16.87 torr, the normal partial pressure of water at 25 • C), whereas cross-linked BR has effectively no water vapor permeation. Consequently, the LLC-BR material was found to have two-orders of magnitude higher water/DMMP molar selectivity than cross-linked pure BR and commercial BR gloves. The Q I -phase LLC-BR material also exhibited more than one order of magnitude higher water/DMMP molar selectivity tha

Who reads Selective rejection of a water-soluble nerve agent stimulant using a nanoporous lyotropic liquid crystal–butyl rubber vapor barrier material: Evidence for a molecular size-discrimination mechanism?

Author

Xiaoyun Lu; Vinh Nguyen; Xiaohui Zeng; Brian J. Elliott; Douglas L. Gin

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0376-7388)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)