Modification of alkali silicate solutions by organic reagents and investigation of the properties of the final products

Synthesis and properties of dispersed hybrid materials based on a silicate matrix

“…A commercially available liquid glass (53% aqueous solution of sodium silicate (ASSS), silica modulus n = 3) was taken as an alkalisilicate solution. To produce the dispersed hybrid filler, the alkali-silicate solution was modified with aqueous solutions of salts of transition metals (Cr, Fe, Co, Ni, Cu) or Epoxydan resin ED 20 (ER); then, transition metal salts were introduced into the epoxy silicate emulsion in accordance with the techniques described in [4,6,7]. Composites were prepared by mixing the initial reagents under standard conditions through variation of their ratio.…”

“…The apparent and true densities and total porosity of the obtained powders were measured in accordance with the techniques described in [8,9]. The true den sity was determined by the picnometric method, whereas the apparent density was determined in the bulk state with settling [4].…”

“…Special interest is concerned with organosilicate composites obtained on the basis of silicate matrix [1][2][3][4]. The application of the sol gel method is efficient in forming hybrid composites of specific molecular structure and physical chemical properties [1,2,4,5].…”

“…The application of the sol gel method is efficient in forming hybrid composites of specific molecular structure and physical chemical properties [1,2,4,5]. The synthesis sol gel method consists in the possibility of combining initial reagents in solution, by variation organic and inorganic components fragments, and obtaining products in an ultradispersed state.…”

“…In the process of such materials' synthesis, a nanocomposite is assem bled from inorganic and organic fragments during phase transition. Thus, in the course of a sol gel tran sition, one can obtain [1,2,4] waterproof gels, high porosity monolith materials, nanosized films and coatings, dispersed products of general use (for exam ple, fillers, pigments, and luminophors), etc. The sili cate modification of organic reagents enables one to form highly dispersed hybrid composites with elevated chemical stability and mechanical strength in combi nation with optimal thermal physical properties, which facilitate the effective improvement of a set of operational parameters of composite materials of dif ferent functions [4][5][6][7].…”