The influence of the morphology of hollow fibres on the ultrafiltration rate of blood
H.‐J. Gensrich, Mika A. Holtz, E. Bossin, D. Bartsch, Heinz Buschatz · Die Makromolekulare Chemie · 1985
As well known in the ultrafiltration of blood through hollow fibres the ultrafiltration rate of blood is lower than the permeability for pure water. Applying cellulose hollow fibres with different average diameters of pores the proportion of ultrafiltration rate of blood to the permeability of pure water decreases with increasing average diameters of pores. The same tendency is found if instead of blood aqueous solutions of solutes of different molecular mass are used. It is shown, that this phenomenon cannot be explained only by the formation of a secondary layer on the surface of the membrane in consequence of concentration polarization. There has to be suggested an adsorption of molecules on the walls of membrane pores leading to narrowing of pores. In this way the ultrafiltration rate may be affected also in hydrophilic cellulose hollow fibres.