Polymer coating for hemoperfusion over activated charcoal.

Plasma polymerization (glow discharge) was used to make a polymeric coat with hexamethyldisiloxane on the surface of activated charcoal granules. These samples were examined with ESCA and SEM for surface chemical analysis, coat thickness, and uniformity, and for changes in surface topography. The effects of the coat on absorptive capacity and release of fine particles were examined.