A novel cross-linked nano-coating for carbon dioxide capture

Ultra-thin (∼100 nm) films with uniform thicknesses can facilitate high CO 2 permeation and are of potential technological significance for CO 2 capture. Among many approaches for obtaining such materials, the recently developed continuous assembly of polymers (CAP) technology provides a robust process, allowing for the production of defect-free, cross-linked and surface-confined thin films with nanometer scale precision. Through utilization of this nanotechnology, we have constructed composite membranes containing cross-linked ultra-thin surface films. The membrane materials formed exhibited significantly high permeances as well as excellent gas separation selectivity. Defect-free and cross-linked ultra-thin (sub 100 nm) film composite membranes have been prepared. The membrane materials formed exhibited significantly high CO 2 permeances of over 1200 GPU as well as excellent CO 2 /N 2 selectivity of over 40.