Spinning of hollow fiber ultrafiltration membranes from a polymer blend

doi:10.1016/0376-7388(95)00088-T

Journal of Membrane Science

Volume 106, Issue 3, 31 October 1995, Pages 233-243

https://doi.org/10.1016/0376-7388(95)00088-T Get rights and content

Abstract

In this study the dry-wet spinning technique is used for the preparation of hollow fiber membranes. In the polymer solution a blend of two polymers, poly(ether sulfone) and poly(vinyl pyrrolidone), is used. The morphology of the membranes obtained is related to rheological characteristics and phase behavior of the polymer solution during spinning. The outer surface pore structure is mainly dependent on the conditions in the airgap. The typical performance of the membranes lies in the ultrafiltration region.

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Variation of these variables will lead to changes in RT which will significantly affect the formation of resultant HF. Generally, when a nascent HF spends longer RT, the influence of die-well and shear forces may decrease the overall diameter of spun fibers [92]. In a study by Refs. [93,94] shows that the shorter the RT, the thinner the skin layer and as a result led to higher CO2 permeance.
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Otherwise, in the field of membranes for gas and liquid separation, blends allow to tune hydrophobicity [36], protein adsorption [37], selectivity [38]. Nevertheless, few studies are focused on the characterization of phase separation behavior of polymer blends in solution [39–41], or the preparation of porous structures via phase separation from quaternary systems [36–38,42]. Within this framework, the case study presented in the following aims to partially bridge the gap concerning phase separation in quaternary systems, by providing experimental data and discussion about possible demixing mechanisms.
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¹: Present address: NPBI, P.O. Box 30, 7880 AA Emmer Compascuum, Netherlands.

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Spinning of hollow fiber ultrafiltration membranes from a polymer blend

Abstract

J. Membrane Sci.

Desalination

Desalination

J. Membrane Sci.

Colloids Surfaces

Desalination

J. Membrane Sci.

J. Membrane Sci.

J. Membrane Sci.

J. Membrane Sci.

J. Membrane Sci.

J. Membrane Sci.

Outer skinned hollow fibers spinning and properties

Polysulfone hollow fibers. I. Spinning and properties

J. Appl. Polym. Sci.

Polysulfone hollow fibers. II. Morphology

J. Appl. Polym. Sci.