Abstract
Two different types of membranes made of the same material were developed and their solute permeation characteristics were examined. One is PAN CX2 membrane which has double layer void structure, and the other is PAN DX membrane which has gradient micro porous structure. Both membranes showed the similar filtration characteristics: SC for β2 M 0.6, SC for Alb 0.001-0.002 and no permeation of endotxin, which demonstrate the sharp cutoff characteristics.
On the other hand, the solute permeability (Pm) of the membranes gave the diffrent results. Higher values of Pm were obtained with PAN DX for all the solutes tested, e. g. Pm for β2 M was 5.9×10-5cm/sec with PAN DX, whereas 4.9×10-5cm/sec with CX2.
