ADSORBENT HAVING DIFFERENTLY MODIFIED SURFACE AREAS, METHOD FOR THE PRODUCTION THEREOF AND USE OF THE SAME

摘要

The invention relates to a method for producing an absorbent, comprising the following steps: (a) a particulate, porous carrier material comprising modifiable binding sites on the outer and inner surfaces thereof is provided, (b) the pores of said carrier material are filled with at least one liquid medium under the filling conditions, said medium being essentially immiscible with a solution under the modifying conditions, said solution enabling binding sites on the surfaces of the carrier material to be essentially fully modified, (c) the binding sites are essentially fully modified on the outer surfaces of the carrier material to form at least one surface modification M1, and (d) the medium which is essentially immiscible, under the modifying conditions, with a solution which enables binding sites on the surfaces of the carrier material to be essentially fully modified, is optionally removed from the pores. The invention also relates to an adsorbent for whole blood, in the form of essentially spherical, non-aggregated particles, comprising a porous carrier material having an average pore size of 1,5 mu m. The outer surfaces of the porous carrier material comprise at least one surface modification M1, and thus do not essentially interact with blood cells, and the inner surfaces of the porous carrier material, i.e. the surfaces of the pores of said porous carrier material, comprise at least one surface modification M2 which interacts with substances contained in blood.