Synthesis of nanocomposites based on polyisocyanate/sodium silicate and aminosylan spacer

Abstract

Organo-inorganic nanocomposites with regulated interaction between the components based on sodium silicate, polyisocyanate and promoter of adhesion between organic and inorganic components - γ-methacryloxypropyl trimethoxysilane have been created. The structure, physical and mechanical properties and chemistry of the formation of organo-inorganic nanocomposites with the help of IR spectroscopy, SEM, and complex of physical-mechanical researches have been investigated. The optimum content of γ-methacryloxypropyl trimethoxysilane and the ratio of organic and inorganic components in nanocomposites have been determined. The analysis of physical and mechanical properties showed a significant increase in compressive strength (82 MPa) and deformation at compression (31%). Improvement of physical and mechanical parameters of nanocomposites is due to the formation of a more "dense" structure when introducing γ-methacryloxypropyl trimethoxysilane. The formation of such a structure of nanocomposites in the presence of a promoter of adhesion is confirmed by morphological studies. The obtained results showed the possibility of using γ-methacryloxypropyltrimethoxysilane as an adhesion promoter in the formation of organo-inorganic nanocomposites with an adjustable interaction between the components.

Keywords:

• adhesion promoter
• Organo-inorganic nanocomposites
• silane with methacrylic functionality