Microstructures in phase-inversion membranes. Part I. Formation of macrovoids

Share/Save/Bookmark

Smolders, C.A. and Reuvers, A.J. and Boom, R.M. and Wienk, I.M. (1992) Microstructures in phase-inversion membranes. Part I. Formation of macrovoids. Journal of Membrane Science, 73 (2-3). pp. 259-275. ISSN 0376-7388

open access
[img]
Preview
PDF
1MB
Abstract:A new mechanism for the formation of macrovoids in phase-inversion membranes is proposed. It is based on the observed difference in type of demixing of a thin film of a polymer solution when immersed in a nonsolvent bath: delayed or instantaneous demixing. The explanation for macrovoid formation assumes local conditions of delayed demixing in front of a certain layer of nuclei already formed, due to a change in the interfacial compositions at the advancing coagulation front, as compared to the original composition at the interface film-bath. Effects of variations in membrane formation conditions which can be calculated using the model of diffusive mass transport in thin films of polymeric solutions in combination with phase separation in phase-inversion membranes, completely support the mechanism as proposed.
Item Type:Article
Copyright:© 1992 Elsevier Science
Research Group:
Link to this item:http://purl.utwente.nl/publications/10293
Official URL:http://dx.doi.org/10.1016/0376-7388(92)80134-6
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 105590