Unique structure and properties of inorganic–organic hybrid films prepared from acryl/silica nano-composite emulsions

Abstract

Transparent films were prepared from nano-composite emulsions, which contained nano-size core-shell-type particles (ca. 60 nm in diameter) consisting of colloidal silica (inorganic core, ca. 30 nm in diameter) and poly(methyl methacrylate-con -butyl acrylate) (organic shell). The silica content in the film could be increased up to 150 wt/wt% by keeping its homogeneity. It was revealed that the formation of such a core-shell structure is guided by the surface sedimentation of a nonionic surfactant above its clouding point to form an organic thin layer that can provide the sites for monomer absorption and polymerization. The thermal and mechanical properties of the resultant nano-composite films were evaluated by various methods and compared with those of simple blend films of the corresponding acrylic emulsion and colloidal silica. It was clarified that the high-temperature resistance of the nano-composite films can be improved by the reinforcement effect of silica particles.

Modeling the wetting of titanium dioxide and steel substrate in water-borne paint and varnish materials in the presence of surfactants

“…For the effective use of modifiers in certain paint compositions, it is necessary to conduct thorough research in the field of physical and chemical mechanics and colloidal chemistry. It follows from [7,8] that, as a rule, the selection of modifiers is carried out for each individual case and without taking into consideration the regularities of the influence of the nature of the binder, pigment, and surfactant on the effectiveness of modification.…”

Waterborne Acrylate-Based Hybrid Coatings with Enhanced Resistance Properties on Stone Surfaces

“…Conversely, in other cases, high amounts of nanosilica reduced the T g and the temperature for maximum mechanical damping. Furthermore, high amount of silica nanoparticles lead to a more brittle behavior [32][33][34][35][36].…”