Fabrication of Hollow-Fiber Membranes by Phase Inversion

Chung, T.S.N. 2008. Fabrication of hollow-fiber membranes by phase inversion. Advanced Membrane Technology and Applications, 821-839. 

FABRICATION OF HOLLOW-FIBER MEMBRANES BY PHASE INVERSION... 

T.S. Chung. (2008). Fabrication of hollow fiber membranes by phase inversion. In Advanced Membrane Technology and Applications, N. Li et al. (Eds.), John Wiley Sons, Inc., Hoboken, NJ, pp. 821-841. 

Studies on the fabrication and use of polymeric dual-layer hollow fiber membranes through phase inversion-based co-extrusion began in the late 1970s for hemodialysis [39], In the late 1980s, Yanagimoto invented dual-layer asymmetric flat-sheet and hollow-fiber membranes to improve the antifouling properties of polymeric membranes used for water purification [40,41]. The patent disclosures about the procedures of fabricating polymeric multilayer hollow fibers for gas separation wctc made by Du Pont de... 

Despite the fact that there has been extensive study on the preparation and characterizations of flat-sheet PVDF membranes [16-20] fabricated by NIPS, limited studies have been devoted to the fabrication and characterization of PVDF hollow-fiber membranes [21-24]. It is well accepted that the phase inversion process of hollow-fiber membranes is much more complex than that of flat-sheet membranes, and the controlling factors for the former during membrane formation are distinctly different from those for the latter. One essential difference is the dope formulation that affects the dope viscosity. Usually, a polymer dope possessing a viscosity of... 

The MIEC hollow fiber membranes are usually fabricated by a combined phase inversion and sintering process. The immersion induced phase inversion technique has been widely employed to prepare polymeric hollow fiber membranes. Due to the excellent binding capability of the polymers, a large amount of fine inorganic powder can be mixed inside the polymer solution to form a uniform mixture from which the ceramic hollow fiber precusors can be extruded at room temperature. Subsequent sintering would convert these precursor fibers into the ceramic hollow fiber membrane products. Figure... 

In the fabrication of FIFMMRs, the porous hollow fiber membranes with asymmetric structures are first prepared through a phase-inversion/ sintering technique, which has been described in Chapter 2 of this book and in many recent publications [31]. The microstructure of the hollow fibers can be tailored as expected for different applications by modulation of the suspension composition and the spinning parameters [32, 33]. Aran et al. [5,21] developed porous AI2O3 FIFMMRs with various geometrical parameters for gas-liquid-solid (G-L-S) reactions. The Pd-AhOa catalyst... 

Ceramic hollow-fiber support can be fabricated by a phase inversion-based extrusion/sintering technique [3], which allows a more flexible control over the membrane macro/microstructures by adjusting fabricating parameters such as air-gap, extrusion rate, internal coagulant composition, and the amount of nonsolvent additive in the spinning suspensions [4]. Such unique structural diversity delivers... 

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