HIGH-POROSITY TRACK MEMBRANES FOR FRACTIONATION OF BIOLOGICAL OBJECTS

V.A. Oleinikov

Methods for preparation of high-porosity track membranes (TM) are described:
 a) complex shape TM with a cylindrical section to compensate for the selecting pore diameter scatter due to thickness variation and non-uniformity of the original film and
 b) TM containing pores with a preset distribution by directions.
A numerical model is developed for estimating the probability of defect formation in TM with an unparallel pore system three was of pore direction distribution are considered: 1) uniform uniplane, 2) uniform biplane and 3) circular. It is shown that using TM with unparallel pores considerably reduces the defect probability and the best results are obtained for the two latter cases. The presented results permit preparation of TM with desired properties.