Influence of Oligomers Based on Trifunctional Oxyphenyl on Colloid-Chemical Characteristics of Mineral Dispersions

Abstract

The paper describes change patterns of colloid-chemical properties of mineral dispersions depending on the number of oxygroups in the aromatic ring of an elementary unit cell of oligomer molecules based on trifunctional oxyphenyls. It is proved that with the increase in the number of oxygroups within an elementary unit from 1 (phenol) to 3 (phloroglucine), the increase in plasticizing ability and plasticizing activity of oligomers is observed, while the plastic viscosity decreases due to the increase in water layer thickness between particles. Adsorption saturation of a surface layer with phloroglucinefurfural oligomers is achieved with smaller concentrations in the solution rather than with resocine-and phenolfurfural oligomers, which indicates the increase in binding energy of adsorbate with an adsorbent surface. The increase in repulsive forces is mainly caused by the formation of developed adsorption layers of oligomers on the surface of disperse phase particles and the increase in surface negative charge during adsorption of anion oligomers with one, two or three oxygroups within an elementary unit.