ION-SELECTIVE NANOCHANNEL MEMBRANE AND PREPARATION METHOD THEREFOR

摘要

An ion-selective nanochannel membrane and a preparation method therefor. The ion-selective nanochannel membrane comprises two layers of membranes bonded together, one layer being a segmented copolymer 1 membrane and the other layer being a segmented copolymer 2 membrane. The nanochannel membrane has submicron-order thickness, has a regular nano-scale channel distribution and high porosity, the channel diameter being below 25 nm, and the two membranes having different surface charge distributions. The membrane has ultra-high ion flux, superior ion selectivity, and submicron-order thickness, displaying excellent osmotic energy conversion performance.