Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 14, 2017
Previous Article Next Article

A facile and scalable fabrication method for thin film composite reverse osmosis membranes: dual-layer slot coating

Author affiliations

Abstract

We report on a unique, facile and scalable fabrication technique, dual-layer slot coating (DSC) for high performance polyamide (PA) thin film composite (TFC) reverse osmosis (RO) membranes. DSC allows the simultaneous and continuous spreading of two reactive monomer solutions to create an unsupported PA layer via in situ polymerization, which is then adhered onto a porous support to form a membrane. DSC facilitates the characterization of the PA layer structure by easily isolating it. The DSC-assembled PA layer exhibits a thinner and smoother structure with a more wettable and less negatively charged surface than the one prepared via conventional interfacial polymerization (IP), which was attributed to the uniformly expedited amine (MPD) diffusion at the bulk liquid interface during film formation. As a result, DSC enables the formation of an extremely thin (∼9 nm) and dense PA layer using a very low MPD concentration, which is not feasible by conventional IP. Importantly, the DSC-assembled membrane shows an excellent water flux and NaCl rejection, exceeding both IP control and commercial RO membranes. The DSC technique will open a new paradigm for the fabrication of TFC membranes with strong commercial potential due to its simplicity, scalability and high performance.

Graphical abstract: A facile and scalable fabrication method for thin film composite reverse osmosis membranes: dual-layer slot coating

Back to tab navigation

Supplementary files

Article information


Submitted
26 Jan 2017
Accepted
06 Mar 2017
First published
06 Mar 2017

J. Mater. Chem. A, 2017,5, 6648-6655
Article type
Paper

A facile and scalable fabrication method for thin film composite reverse osmosis membranes: dual-layer slot coating

S. Park, W. Ahn, W. Choi, S. Park, J. S. Lee, H. W. Jung and J. Lee, J. Mater. Chem. A, 2017, 5, 6648
DOI: 10.1039/C7TA00891K

Social activity

Search articles by author

Spotlight

Advertisements