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- W4293736705 abstract "Materials which selectively transport molecules offer powerful opportunities for concentrating and separating chemical agents. Here, utilizing static and dynamic chemical gradients, transport of molecules within swollen crosslinked polymers is demonstrated. Using an ≈200 μm static hydroxyl to hexyl gradient, the neutral ambipolar nerve agent surrogate diethyl (cyanomethyl)phosphonate (DECP) is directionally transported and concentrated 60-fold within 4 hours. To accelerate transport kinetics, a dynamic gradient (a travelling wave) is utilized. Here, the non-polar dye pyrene was transported. The dynamic gradient is generated by an ion exchange process triggered by the localized introduction of an aqueous NaCl solution, which converts the gel from hydrophobic to hydrophilic. As the hydrophilic region expands, associated water enters the gel, and pyrene is pushed ahead of the expansion front. The dynamic gradient provides about 10-fold faster transport kinetics than the static gradient." @default.
- W4293736705 created "2022-08-31" @default.
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- W4293736705 date "2022-09-08" @default.
- W4293736705 modified "2023-10-12" @default.
- W4293736705 title "Static and Dynamic Gradient Based Directional Transportation of Neutral Molecules in Swollen Polymer Films" @default.
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- W4293736705 doi "https://doi.org/10.1002/anie.202206061" @default.
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