Abstract
The present research investigates the solution to solve the delamination issue and control the morphology of dual-layer membranes fabricated from polymer/solvent binary systems without additives, post-treatment and other complicated processes. First, Extem®, Ultem®, polysulfone (PSf) and polyethersulfone (PES) were used to study the mechanism behind the adhesion/delamination phenomenon. It was found that adhesion of dual-layer membranes has nothing to do with the similar functional group of top and bottom polymers. Dual-layer membranes with excellent adhesion can be obtained by a newly proposed hydrophilicity control mechanism. More specifically, to obtain a delamination-free membrane, bottom layer should be more hydrophilic than top layer. If not, a significant difference in precipitation rate of the two layers or replacing the coagulant with a milder medium was requested. Then, the method was further extended to prepare multi-layer membranes. Finally, desirable morphology of each layer of dual-layer membranes can be obtained by properly adjusting the thickness and solvent types of top and bottom layers.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
