POS9-0300
Li-selective fully aromatic polyamide membranes fabricated by dual strategies-cosolvent addition and solvent activation
Topic
S9. Polymer Technology for Sustainability
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
Myung-Seok Lee (Korea University)
Co-Author(s)
Abstract
The growing demand for lithium (Li) has driven the development of efficient Li recovery technologies. Nanofiltration (NF) membranes are promising for Li separation, but conventional semi-aromatic polyamide (PA) membranes suffer from poor acid stability. In contrast, fully aromatic PA membranes offer excellent acid resistance but exhibit low water permeance and Li selectivity. In this study, we developed a highly permeable and Li-selective fully aromatic PA NF membrane using a dual strategy of cosolvent addition and subsequent solvent activation. This approach tailored the PA nanostructure to facilitate selective Li transport while preserving acid resistance. The optimized membrane exhibited high water permeance and excellent Li selectivity, outperforming commercial and laboratory-made membranes. These results demonstrate a simple and scalable strategy for producing acid-resistant, ion-selective NF membranes for various industrial separation processes.
