Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on Struvite
Textural and morphological features of hydrophobic silicon dioxide, obtained by the hydrolysis of tetraethoxysilane in an ammonia medium followed by modification of a spherical SiO<sub>2</sub> particles surface with a hydrophobic polymethylhydrosiloxane, were studied in this work. The si...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/7/1186 |
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| author | Igor V. Valtsifer Yan Huo Valery V. Zamashchikov Artem Sh. Shamsutdinov Natalia B. Kondrashova Anastasia V. Sivtseva Anna V. Pyankova Viktor A. Valtsifer |
| author_facet | Igor V. Valtsifer Yan Huo Valery V. Zamashchikov Artem Sh. Shamsutdinov Natalia B. Kondrashova Anastasia V. Sivtseva Anna V. Pyankova Viktor A. Valtsifer |
| author_sort | Igor V. Valtsifer |
| collection | DOAJ |
| description | Textural and morphological features of hydrophobic silicon dioxide, obtained by the hydrolysis of tetraethoxysilane in an ammonia medium followed by modification of a spherical SiO<sub>2</sub> particles surface with a hydrophobic polymethylhydrosiloxane, were studied in this work. The size of silicon dioxide particles was controlled during preparation based on the Stöber process by variation of the amount of water (mol) in relation to other components. The ratio of components, synthesis time and amount of the hydrophobizing agent were determined to obtain superhydrophobic monodisperse silicon dioxide with a spherical particle size of 50–400 nm and a contact angle of more than 150°. In the case of the struvite example, it was demonstrated that the application of spherical- shaped hydrophobic silicon dioxide particles in powder compounds significantly improves the flowability of crystalline hydrates. The functional additive based on the developed silicon dioxide particles makes it possible to implement the use of crystalline hydrates in fire-extinguishing powders, preventing agglomeration and caking processes. The high fire-extinguishing efficiency of the powder composition based on struvite and the developed functional additive has been proven by using thermal analysis methods (TGA/DSC). |
| first_indexed | 2024-03-11T05:28:39Z |
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| id | doaj.art-4fb19d78dd6c4d36a4dd54bc5939ddd9 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T05:28:39Z |
| publishDate | 2023-03-01 |
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| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-4fb19d78dd6c4d36a4dd54bc5939ddd92023-11-17T17:16:56ZengMDPI AGNanomaterials2079-49912023-03-01137118610.3390/nano13071186Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on StruviteIgor V. Valtsifer0Yan Huo1Valery V. Zamashchikov2Artem Sh. Shamsutdinov3Natalia B. Kondrashova4Anastasia V. Sivtseva5Anna V. Pyankova6Viktor A. Valtsifer7Institute of Technical Chemistry, Ural Branch, Russian Academy of Sciences—Perm Federal Research Center, Russian Academy of Sciences, 614013 Perm, RussiaCollege of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, ChinaInstitute of Chemical Kinetics and Combustion, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, RussiaInstitute of Technical Chemistry, Ural Branch, Russian Academy of Sciences—Perm Federal Research Center, Russian Academy of Sciences, 614013 Perm, RussiaInstitute of Technical Chemistry, Ural Branch, Russian Academy of Sciences—Perm Federal Research Center, Russian Academy of Sciences, 614013 Perm, RussiaInstitute of Technical Chemistry, Ural Branch, Russian Academy of Sciences—Perm Federal Research Center, Russian Academy of Sciences, 614013 Perm, RussiaInstitute of Technical Chemistry, Ural Branch, Russian Academy of Sciences—Perm Federal Research Center, Russian Academy of Sciences, 614013 Perm, RussiaInstitute of Technical Chemistry, Ural Branch, Russian Academy of Sciences—Perm Federal Research Center, Russian Academy of Sciences, 614013 Perm, RussiaTextural and morphological features of hydrophobic silicon dioxide, obtained by the hydrolysis of tetraethoxysilane in an ammonia medium followed by modification of a spherical SiO<sub>2</sub> particles surface with a hydrophobic polymethylhydrosiloxane, were studied in this work. The size of silicon dioxide particles was controlled during preparation based on the Stöber process by variation of the amount of water (mol) in relation to other components. The ratio of components, synthesis time and amount of the hydrophobizing agent were determined to obtain superhydrophobic monodisperse silicon dioxide with a spherical particle size of 50–400 nm and a contact angle of more than 150°. In the case of the struvite example, it was demonstrated that the application of spherical- shaped hydrophobic silicon dioxide particles in powder compounds significantly improves the flowability of crystalline hydrates. The functional additive based on the developed silicon dioxide particles makes it possible to implement the use of crystalline hydrates in fire-extinguishing powders, preventing agglomeration and caking processes. The high fire-extinguishing efficiency of the powder composition based on struvite and the developed functional additive has been proven by using thermal analysis methods (TGA/DSC).https://www.mdpi.com/2079-4991/13/7/1186nanosized silicon dioxidespherical monodisperse particlessuperhydrophobicityfire-extinguishing powder compositionstruvitepowder flowability |
| spellingShingle | Igor V. Valtsifer Yan Huo Valery V. Zamashchikov Artem Sh. Shamsutdinov Natalia B. Kondrashova Anastasia V. Sivtseva Anna V. Pyankova Viktor A. Valtsifer Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on Struvite Nanomaterials nanosized silicon dioxide spherical monodisperse particles superhydrophobicity fire-extinguishing powder composition struvite powder flowability |
| title | Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on Struvite |
| title_full | Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on Struvite |
| title_fullStr | Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on Struvite |
| title_full_unstemmed | Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on Struvite |
| title_short | Synthesis of Hydrophobic Nanosized Silicon Dioxide with a Spherical Particle Shape and Its Application in Fire-Extinguishing Powder Compositions Based on Struvite |
| title_sort | synthesis of hydrophobic nanosized silicon dioxide with a spherical particle shape and its application in fire extinguishing powder compositions based on struvite |
| topic | nanosized silicon dioxide spherical monodisperse particles superhydrophobicity fire-extinguishing powder composition struvite powder flowability |
| url | https://www.mdpi.com/2079-4991/13/7/1186 |
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