Abstract
Reverse-osmosis membranes made of composites of carbon nanotubes and aromatic polyamide have been exhaustively studied in recent years, due to their high salt rejection and permeability. However, there is still not complete agreement on the mechanism of diffusion of water through these interesting membranes. This study combines experiment and theory to propose a mechanism based on water hopping through the nanotubes dispersed within the membrane, and shows the great utility of multiscale simulations in this context. This understanding of water diffusion through nanocomposites is necessary for the optimization of next-generation desalination membranes.
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