Ultra-filters impregnated with lipids or/and their analogues turn out to be highly perspective in the development of new types biomimetic membranes (BMM). Some of their features such as stability, relatively large size, high impedance, ion selectivity etc. can be pointed out as beneficial for the construction of artificial analogues of natural membranes. From one side, these properties depend on the type of ultra-filter used - pore density, mean pore diameter and distribution, fiber material. On the other side, impregnating substance and techniques of preparation (impregnation procedure) are important in no lesser extent. The experimental data obtained by impedimetric analysis of the electrochemical characteristics of such systems allow a physical model of BMM to be worked out.

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