Construction Material Engineering

ANALYSIS OF APPEARANCE QUALITY OF SILICATE COATINGS BY ATOMIC FORCE MICROSCOPY METHOD

Вестник МГСУ 5/2018 Том 13
  • Loganina Valentina Ivanovna - Penza State University of Architecture and Construction Doctor of Technical Sciences, Professor, Head of the Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 G. Titova st., Penza, 440028, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .
  • Mazhitov Erkebulan Bisengalievich - Penza State University of Architecture and Construction Postgraduate Student, Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 G.Titova st., Penza, 440028, Russian Federation; Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .

Страницы 599-608

Subject: studying surface quality of silicate coatings based on sol-silicate paints. Research objectives: study regularities in formation of the quality of appearance of silicate coatings, depending on the type of film-forming agent. Materials and methods: polysilicate solutions were prepared by interaction of stabilized solutions of colloidal silica (sols) with liquid glasses. Scanning probe microscopy methods were used to assess the quality of the coating surface. The parameters of surface roughness were determined. Results: it is shown that it is possible to improve the appearance of silicate coatings by using in paints the polysilicate solutions as a film-forming agent. It has been shown that for coating samples based on sodium and potassium polysilicate solution, the surface patches with a less pronounced relief are observed compared to the nature of microprofiles of the coating samples based on potassium and sodium liquid glass. Coatings based on potassium and sodium polysilicate solution are characterized by more uniform distribution of the surface roughness. Conclusions: sol-silicate paints are characterized by higher quality of appearance of the coatings.

DOI: 10.22227/1997-0935.2018.5.599-608

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Regularities of formation of adhesive contact “sol-silicate paint - substrate”

Вестник МГСУ 1/2019 Том 14
  • Loganina Valentina I. - Penza State University of Architecture and Construction Doctor of Technical Sciences, Professor, Head of Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 Germana Titova st., Penza, 440028, Russian Federation.
  • Mazhitov Erkebulan B. - Penza State University of Architecture and Construction postgraduate student of the Department of Quality Management and Technology of Construction Production, Penza State University of Architecture and Construction, 28 Germana Titova st., Penza, 440028, Russian Federation.

Страницы 94-101

Introduction. The use as a binder in the manufacture of silicate paints polysilicate solutions obtained by mixing liquid glass and silica sol is considered. To regulate the rheological properties of the paint, improve the filling and prevent the pigment part from sagging, it has been proposed to introduce glycerin into the binder composition. The results of studying the interfacial interaction between the paint and the substrate are given. Materials and methods. In developing the formulation of silicate paints based on polysilicate solutions, MK-2 microcalcite, marshalite, diatomite and talc of MT-GSM grade were used as a filler, and titanium dioxide as a pigment. Polysilicate solutions were obtained by reacting stabilized solutions of colloidal silica (sols) with aqueous solutions of alkali silicates (liquid glasses). Nanosil 20 and Nanosil 30 silicic acid sol were used, produced by the Promsteklocentr PC. Used potassium liquid glass with module M = 3.29. A thermodynamic method was used to assess the interfacial interaction. Results. Shown that the introduction of glycerol into the formulation of a sol of silicate paint promotes a decrease in the interfacial surface tension and a better wetting of the surface of the mortar substrate. An increase in wetting coefficient is observed. Coatings based on sol silicate paints with the addition of glycerin are characterized by increased crack resistance. An increase in tensile strength, maximum tensile properties, and decrease in the elastic modulus of paint membranes based on the composition with glycerol has been established. The values of the free surface energy of the coating based on the sol of silicate paint and the ratio of the polar to the dispersion component of the free energy of the surface are given. Coatings based on sol of silicate paint with the addition of glycerin are characterized by a large value of the free energy of the surface. In the process of moistening a decrease in the free surface energy is observed due to a decrease in the dispersion component. Conclusions. Studies have shown that the introduction of an additive of glycerin in the formulation of a silicate paint sol contributes to an increase in the performance properties of coatings based on it.

DOI: 10.22227/1997-0935.2019.1.94-101

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