Aggregative stability of water suspension of finely dispersed basalt

Abstract

Production of polyfunctional wood-mineral compositions based on modified wood bark and finely dispersed basalt is associated with the use of aqueous suspension that contains micro- and nanosized rock particles as a solid phase. In this regard, this paper presents the results of the studies focused on the aggregative stability of water suspension of finely dispersed basalt. The stability is associated with the electrokinetic potential of particles of the dispersed phase. The potential varies in dependence on the protolytic properties of the dispersion medium. Measurement of dimensional characteristics in the course of time was carried out with photon-correlation spectroscopy. It has been determined that when pH of the medium is in the range from 7 to 11 the suspension of finely dispersed basalt is aggregatively and sedimentation stable. The critical value of the zeta potential of particles of the solid phase, at which the electrostatic barrier of their interaction indicates itself, is 30 mV.

Keywords

• modified tree bark
• finely dispersed basalt
• protolytic properties
• zeta potential