Affiliation:
1. Department of Separation Science, LUT School of Engineering Science, LUT University, P.O. Box 20, FI-53851 Lappeenranta, Finland
Abstract
Various water treatment processes make extensive use of porous polymeric membranes. A key objective in membrane fabrication is to improve membrane selectivity without sacrificing other properties such as permeability. Herein, LiCl (0–2 wt.%) was utilised as a preforming agent in fabricating biomass-derived cellulosic membranes. The fabricated membranes were characterised by dope solution viscosity, surface and cross-sectional morphology, pure water flux, relative molecular mass cut-off (MWCO, 35 kDa), membrane chemistry, and hydrophilicity. The results demonstrated that at the optimum LiCl concentration (0.4 wt.%), there is an interplay of thermodynamic instability and kinetic effects during membrane formation, wherein the membrane morphology and hydrophilicity can be preferably altered and thus lead to the formation of the membrane with better rejection at no detriment to its permeability.
Funder
Etelä-Karjalan Säästöpankki Säätiö
the Ministry of the Environment
Subject
Filtration and Separation,Chemical Engineering (miscellaneous),Process Chemistry and Technology
Reference73 articles.
1. Goh, P.S., Othman, M.H.D., and Matsuura, T. (2021). Waste Reutilization in Polymeric Membrane Fabrication: A New Direction in Membranes for Separation. Membranes, 11.
2. Recent Advances in Polymer Membranes Employing Non-Toxic Solvents and Materials;Zou;Green Chem.,2021
3. Review of Pressure-Driven Membrane Processes;Vandecasteele;Environ. Prog.,2003
4. Cellulose Regeneration and Chemical Recycling: Closing the “Cellulose Gap” Using Environmentally Benign Solvents;Kostag;Macromol. Mater. Eng.,2020
5. Cellulose Multilayer Membranes Manufacture with Ionic Liquid;Livazovic;J. Memb. Sci.,2015