Study of the surface properties of coatings comprising a mixture of polystyrene and poly(styrenesulfonic acid) on the fused silica glass

Contact angles of water and glycerol droplets are measured for fused silica glass KU-1 before and after the deposition of coatings from chloroform solutions of polystyrene-poly(styrenesulfonic acid) mixtures. The polar component of the surface energy is found to significantly vary for the studied samples linearly decreasing with the growth of the contact angle with water droplets. Silica surface processing with oligomeric diisocyanate CX-100 results in almost complete disappearance of the difference between the measured contact angles for various samples as well as between their values. value reaches its maximum with the increase of poly(styrenesulfonic acid) concentration thus allowing the optimization of the polymer mixture composition for fused silica modification at the production of electrochromatographic capillary columns.