Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 129, Issue -, Pages 171-179Publisher
ELSEVIER
DOI: 10.1016/j.jtice.2021.09.021
Keywords
Porous membranes; MDWDS; SA-NIPS; Hydrophilic interaction force
Categories
Funding
- Program for Innovative Research Team in University of Tianjin [TD13-5044]
- Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China [IRT13084]
- National Natural Science Foundation of China [21776216]
- Tianjin Key Laboratory and Project National Key Research and Development Program of China [2017YFC0403902]
Ask authors/readers for more resources
Increasing the molecular weight and addition contents of pore forming agents have been acknowledged as effective ways to improve permeability in membranes fabricated via nonsolvent induced phase separation (NIPS). However, these techniques negatively impact the overall pore size and mechanical strength of the resulting membranes. Facilitating the mutual diffusion of water (coagulant) and dope solutions (MDWDS) during NIPS is the key to obtain porous membranes with high permeability.
Background: Increasing the molecular weight and addition contents of pore forming agents have been acknowledged as effective ways to improve permeability in membranes fabricated via nonsolvent induced phase separation (NIPS). However, these techniques negatively impact the overall pore size and mechanical strength of the resulting membranes. Facilitating the mutual diffusion of water (coagulant) and dope solutions (MDWDS) during NIPS is the key to obtain porous membranes with high permeability. Methods: Here, surfactants assisted nonsolvent induced phase separation (SA-NIPS) is proposed and used to regulate MDWDS during NIPS. Significant findings: Surfactants facilitate MDWDS. More importantly, MDWDS can be advanced by elevating the hydrophilic interaction force of water and the hydrophilic heads of surfactants while keeping the hydrophobic interaction in the dope solutions constant. SA-NIPS improves the surface porosity of polysulfone (PSF) membranes, thus increasing the permeability of PSF membranes (up to 2.9 times). Moreover, the tensile strength and pore sizes of PSF membranes are maintained. This research may provide a feasible insight into regulation of the morphology and permeability of NIPS-prepared membranes without compromising their pore size and tensile strength. (c) 2021 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available