Some aspects of nanomodification of mineral dispersions by oligomers based on trifunctional oxyphenyl

Rheological properties of highly concentrated dispersions, particle aggregate size of the dispersion phase and other colloid-chemical characteristics of suspensions used in the building industry are determined by the peculiarities of the boundary layer structure. The authors have identified the adsorption parameters of resole oligomers synthesized on the base of trifunctionl oxyphenyls on the following adsorbents: CaCO3, ZnO. The most potential adsorption pattern of phloroglucinefurfural nanomodificator molecules on the surface of chalk particles have been suggested in the work. It has been stated that the molecules of oxyphenyl oligomers are adsorbed on the surface of disperse material particles forming monomolecular layer. The adsorption on the particles surface is provided by the ionic interaction of negative oxy groups of the phloroglicine unit or resocine with positively charged active centers of dispersion phase surface and dispersion forces of interaction between the system of oligomer aromatic rings and particles surface. It has been proved that the injection of optimal dose of phloroglucinefurfural nanomodificator into the chalk and zink oxide suspensions decreases the number average radius of nanomodified particles to the size of initial particles of the dispersions under study ? from 7 to 1 mcm for chalk and from 5 mcm to 50 nm for zink oxide. It demonstrates the peptizing effect of the nanomodificator.