Through functional membranes prepared efficiencies

Disadvantages of the known porous polymeric membrane preparation processes are that they involve additional process steps after the formation of the fiber to come to a final product. It is therefore desirable to have a more efficient preparation process. A new method to prepare structures of any geometry (Figure 3.11c through 3.1 If) and large variety of functionality... 

Disadvantages of the known porous polymeric membrane preparation processes are that they involve additional process steps after the formation of the fiber to come to a final product. It is therefore desirable to have a more efficient preparation process. A new method to prepare structures of any geometry (Figure 6.13c through f) and large variety of functionality was recently proposed [61]. The authors proposed to incorporate the functionality by dispersion of particles in a polymeric porous structure formed by phase inversion. A slurry of dissolved polymer and particulate material can be cast as a flat film or spun into a fiber and then solidified by a phase inversion process. This concept is nowadays commercialized by Mosaic Systems. The adsorber membranes prepared via this route contain particles tightly held together within a polymeric matrix of different shapes, which can be operated either in stack of microporous flat membranes or as a bundle of solid or hollow-fiber membranes. 

FIG. 3 Polarization of mixed liposomal membrane as a function of PE/PC molar ratio. Liposomes were composed of 2 1 phospholipid and cholesterol. Liposomes were prepared by extrusion through a polycarbonate filter. Lipid conc entrahon was 110 p.M and lipid/DPH molar ratio was 50 1. The dotted hne represents the polarization of the membrane and the solid hne is the coupling efficiency. 

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