High-Precision and High-Flux Separation by Rationally Designing the Nanochannels and Surface Nanostructure of Polyamide Nanofiltration Membranes.

ABSTRACT: High-precision separation with increased water permeability is critical for efficient membrane-based water treatment processes. To achieve high selectivity toward different targeted species while allowing rapid water transportation, the structure of the membrane polyamide selective layer requires delicate regulation. Herein, an effective approach to systematically expand the pore size of polyamide layers by incorporating ammonium ion-modified carbon dots (CDs) into the polyamide network is developed. The ammonium ions with different alkyl chain lengths attached to the CDs create nanochannels of different sizes in the network to lower the energy barrier for water transportation while maintaining high selectivity to targeted species. When the alkyl chain length of the ammonium ions reaches e

SUBMITTER: Zheng H 

PROVIDER: S-EPMC11935859 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature