Intensification of foam technology by the energy of the electrohydrothermalpower field. Part 2. Regularities of optimization of the structure of lightweight foam material under the influence of EHTPF

Abstract

The formation of the structure of lightweight foam material is determined by the course of complex processes of a three-phase heterogeneous system. The article studies the control factor ― electric heating, which provides a forced decrease in the moisture content of the foam mass with the acceleration of structuring processes. A model of a gas pore with force vectors is proposed. Internal and external factors affecting the air space during electric heating are analyzed. Thermodynamic changes in the foam system and the phenomena of heat and mass transfer in it are considered. The state of the foam system is determined by variables: temperature, overpressure and electric voltage. Due to the complex effect on the EHTPF foam mass, cavities and stratification are eliminated and the homogeneity of the macrostructure is achieved. The choice of the foaming agent according to the pH and electrical conductivity of the surfactant solution has been substantiated.