The track membrane porous structure and selective properties investigation

The difference between track membrane pore diameter values, obtained with m ethods of "bubble point" (D-BP), hydrodynamics (D-HD) and scanning electron microscopy (D-SEM), was investigated. It was found that D-SEM > D-HD > D-B P and this relation is significant for small pore. This phenomenon is expla ined on the basis of "double-cone" pore shape. The equation was derived, wh ich presented a relation between these values. The results of calculation w ere compared with experimental results. The dependence of track membranes t ested selectivity on particle size-to-pore size relation was obtained in ex periment on latex particles filtration. It was shown, that this dependence is effected by the pore diameter calculation method. (C) 2001 Elsevier Scie nce Ltd. All rights reserved.