Precision-aiming tuning of membranes prepared by NIPS and its performance enhancement. (10th September 2022)

• Record Type: Journal Article
• Authors: Choi, Ook; Ingole, Pravin G.; Park, Chul Ho
• Is Part Of: Journal of cleaner production. Volume 365(2022)
• Publication Date: 2022-09-10
• Subjects: Non-solvent induced phase separation -- Pore structure tuning -- Glass transition temperature -- Microfiltration -- Nanofiltration -- Pier-like structure; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.132858
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: An industrially developed non-solvent induced phase separation (NIPS) for porous membranes is still being studied to improve performances and expand application fields. The work introduces a novel strategy to tune the structures of porous membranes via the combination of glass transition temperatures (Tg ) and external stimulations. Tg was adjusted by the content of residual solvents and additives. Heat and air blowing for higher Tg porous membranes than 100 °C were efficient strategies to improve the surface porosity to 65%, the water flux to 600 LMH/bar, and the BSA rejection to 99.8%. Heat and vacuum for lower Tg membranes than 100 °C could melt the surface pores and becomes a pier-like structure with the water flux of 2.4 LMH/bar and Na2 SO4 rejection of 95.6%. The method could hold great potential for achievable tuning of main characteristic parameters such as structure, performance, porosity, pore size, and molecular weight cut-off.