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Proceeding Paper

Synthesis of Silica Particles from Sugarcane Bagasse Ash for Its Application in Hydrophobic Coatings †

1
Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Avenida Pedro de Alba s/n, San Nicolás de los Garza 66455, N.L., Mexico
2
Facultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, Avenida Universidad s/n, San Nicolás de los Garza 66455, N.L., Mexico
*
Author to whom correspondence should be addressed.
Presented at the 2nd Coatings and Interfaces Web Conference, 15–31 May 2020; Available online: https://ciwc2020.sciforum.net/.
Mater. Proc. 2020, 2(1), 4; https://doi.org/10.3390/CIWC2020-06830
Published: 13 May 2020
(This article belongs to the Proceedings of 2nd Coatings and Interfaces Web Conference (CIWC-2 2020))
: Wastes such as sugarcane bagasse ash (SCBA) can be used as raw material in ceramics by the elaboration of bricks and tiles and the glass industry, due the high amount of silica in its composition (>70%). Another application for SCBA is the synthesis of metallic silicates. In this work, we study the synthesis of sodium silicate with SCBA as the main raw material and the future application of sodium silicate for the preparation of silica particles in order to create hydrophobic surfaces for ceramic materials to prevent their erosion. The sodium silicate synthesis was carried out by the thermochemical method with batches of ash and sodium carbonate in a 1:1 sodium oxide–silicon oxide molar ratio. The thermal treatment was in an electric furnace at 800 °C for 8 h. Then, for the synthesis of the silica particles, the sodium silicate was dissolved in water, and then we added methanol in a 3:2 water methanol volume ratio. The solution was left to age for an hour to create the Si-OH bond. Finally, tetraethylorthosilicate (TEOS) was added and the solution was stirred for 2 h to create a hydrophobic and hydrolytically resistant siloxane by the displacement of H in the Si-OH bond. The application of the solution was by the spray-coating method over substrates of concrete and red clay with the application of 10, 15, and 20 layers. The hydrophobicity was evaluated with the water contact angle test, with the results of contact angles above the 110°, thus demonstrating the capacity of a waste for the generation of coatings to prolong the useful life of building materials.
Keywords: sugarcane bagasse ash; hydrophobic; sodium silicate sugarcane bagasse ash; hydrophobic; sodium silicate
MDPI and ACS Style

Pérez-Casas, J.A.; Zaldívar-Cadena, A.A.; Álvarez-Mendez, A.; Ruiz-Valdés, J.J.; Parra-Arciniega, S.M.d.l.; Sánchez-Vázquez, A.I. Synthesis of Silica Particles from Sugarcane Bagasse Ash for Its Application in Hydrophobic Coatings. Mater. Proc. 2020, 2, 4. https://doi.org/10.3390/CIWC2020-06830

AMA Style

Pérez-Casas JA, Zaldívar-Cadena AA, Álvarez-Mendez A, Ruiz-Valdés JJ, Parra-Arciniega SMdl, Sánchez-Vázquez AI. Synthesis of Silica Particles from Sugarcane Bagasse Ash for Its Application in Hydrophobic Coatings. Materials Proceedings. 2020; 2(1):4. https://doi.org/10.3390/CIWC2020-06830

Chicago/Turabian Style

Pérez-Casas, Jesús A., Antonio A. Zaldívar-Cadena, Anabel Álvarez-Mendez, Juan Jacobo Ruiz-Valdés, Salomé M. de la Parra-Arciniega, and Astrid I. Sánchez-Vázquez. 2020. "Synthesis of Silica Particles from Sugarcane Bagasse Ash for Its Application in Hydrophobic Coatings" Materials Proceedings 2, no. 1: 4. https://doi.org/10.3390/CIWC2020-06830

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