Autonomously Responsive Membranes for Chemical Warfare Protection
Name
doi-10.1002 ADFM.202000258.pdf
Description
Accepted version
Size
3.19 MB
Format
Adobe PDF
Checksum (MD5)
bfeaf82379930ac4851730a5844966f4
Author(s)
Li, Yifan
Chen, Chiatai
Meshot, Eric R.
Buchsbaum, Steven F.
Herbert, Myles Benton
Zhu, Rong
Kulikov, Oleg
McDonald, Benjamin Rebbeck
Bui, Ngoc T. N.
Jue, Melinda L.
Date Issued
April 2020
Journal
Advanced Functional Materials
Publisher
Wiley
Citation
Li, Yifan et al. "Autonomously Responsive Membranes for Chemical Warfare Protection." Advanced Functional Materials 30, 25 (April 2020): 2000258 © 2020 Wiley
Version
Author's final manuscript
Abstract
Stimuli-responsive materials offer new opportunities to resolve long-standing material challenges and are rapidly gaining pivotal roles in diverse applications. For example, smart protective garments that rapidly transport water vapor and autonomously block chemical threats are expected to enable an effective new paradigm of adaptive personal protection. However, the incorporation of these seemingly incompatible properties into a single responsive system remains elusive. Herein, a bistable membrane that can rapidly, selectively, and reversibly transition from a highly breathable state in a safe environment to a chemically protective state when exposed to organophosphate threats such as sarin is demonstrated. Dynamic response to chemical stimuli is achieved through the physical collapse of an ultrathin copolymer layer on the membrane surface, which efficiently gates transport through membrane pores composed of single-walled carbon nanotubes (SWNTs). The adoption of nanometer-wide SWNTs for ultrafast moisture conduction enables a simultaneous boost in size-sieving selectivity and water-vapor permeability by decreasing nanotube diameter, thereby overcoming the breathability/protection trade-off that limits conventional membrane materials. Adaptive multifunctional membranes based on this platform greatly extend the active use of a protective garment and present exciting opportunities in many other areas including separation processes, sensing, and smart delivery.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1002/adfm.202000258
