Abstract

The cross-section morphologies of polymeric membranes obtained by scanning electron microscopy are presented. Membranes are prepared by a wet phase inversion process from cellulose acetate, polysulfone, polyester and a polyether type of elastomeric polyurethanes, poly(methylmethacrylate), and polyamide—nylon 4,6. Morphologies are qualitatively correlated with the turbidity appearance and its intensity during the (proto)membrane formation process and with their permeability to pure water. From the morphological characteristics, such as different cellular or dense structures, macrovoids, and polymer beads, and from the turbidity phenomena during the (proto)membrane formation, the nucleation and growth of polymer-lean or polymer-rich phase and the spinodal modes of polymer-solvent-nonsolvent ternary system decomposition are postulated. © 1996 John Wiley & Sons, Inc.

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 call

Disclaimer: 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.