Please use this identifier to cite or link to this item:
|Title:||Novel hollow fiber membranes with defined unit-step morphological change||Authors:||Chung, T.-S.
PBI blend fibers
|Issue Date:||31-Oct-2001||Citation:||Chung, T.-S., Tun, C.M., Pramoda, K.P., Wang, R. (2001-10-31). Novel hollow fiber membranes with defined unit-step morphological change. Journal of Membrane Science 193 (1) : 123-128. ScholarBank@NUS Repository.||Abstract:||We have found that sharply defined unit-step morphological changes can be created in the middle of the cross-section of hollow fiber membranes wet-spun from highly concentrated immiscible poly(2,2′-m-phenylene)-5,5′-polybenzimidazole (PBI) and polysulfone (PSf) blend solutions. A halo is observed with yellowish color having wavelength in the range 580-595nm. The abrupt change in transmittance light implies distinct morphological changes at the interface because the halo region possesses significantly different morphology and pore sizes from the inner and outer regions. The width of the halo ring is approximately 18-20% of the hollow fiber wall thickness. The mapping image and spectra obtained from field emission scanning electron microscopy coupled with energy dispersive X-ray analysis (FESEM-EDX) suggest that the distribution of the elements present in hollow fiber is homogeneous. X-ray photoelectron spectroscopic (XPS) results indicate that the halo formation is not caused by the phase separation of PBI and PSf, but by a physical phenomenon. © 2001 Elsevier Science B.V. All rights reserved.||Source Title:||Journal of Membrane Science||URI:||http://scholarbank.nus.edu.sg/handle/10635/66709||ISSN:||03767388|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 6, 2018
WEB OF SCIENCETM
checked on Dec 31, 2018
checked on Aug 18, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.