Quaternization-spiro design of chlorine-resistant and high-permeance lithium separation membranes.

ABSTRACT: Current polyamide lithium extraction nanofiltration membranes are susceptible to chlorine degradation and/or low permeance, two problems that are hard to reconcile. Here we simultaneously circumvented these problems by designing a quaternized-spiro piperazine monomer and translating its beneficial properties into large-area membranes (1 × 2 m²) via interfacial polymerization with trimesoyl chloride. The quaternary ammonium and spiral conformation of the monomer confer more positive charge and free volume to the membrane, leading to one of the highest permeance (~22 L m^-2 h^-1 bar^-1) compared to the state-of-the-art Mg²⁺/Li⁺ nanofiltration membranes. Meanwhile, membrane structures are chlorine resistant as the amine-acyl bondi

SUBMITTER: Peng H 

PROVIDER: S-EPMC10482931 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature