Formation of effective concentration of film forming superhydrophobic coatings based on silicon dioxide

The object of research is the hydrophobization a coating based on styrene-acrylic copolymer and cellulose acetate butyrate with pyrogenic silicon dioxide. hydrophobicity or hydrophilicity surface depends mainly chemical structure its roughness. A relief hydrophilic will be wetted much more easily than flat same material, vice versa – an increase in roughness hydrophobe accompanied by pronounced repulsion water. size number irregularities significantly affect wetting characteristics investigated surface. combination low energy forms superhydrophobic Such surfaces have found application self-cleaning, frost-resistant, antifriction, electrically conductive oil-sorbing coatings. In this work, were used as film former. Pyrogenic dioxide Aerosil R 972, which was hydrophobized dimethyldichlorosilane, nanofiller. compositions applied to laboratory glasses dip coating. determination carried out using glycerin diiodomethane. hydrophobic properties coatings evaluated measuring contact angles water goniometer. analysis morphological photographs scanning electron microscope has been out. state created determined their energies calculated technique Owens-Wendt model. process polymer-based investigated, occurs both due modification introduction creation nanoroughness layer dependences materials are depending SiO2 filling. values critical concentration modifier for transition polymers determined. As result, influence polymer crystallinity comparing changes during modification.