| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Influence of Dispersants on the Dispersion Performance of SiO2 Aerogel Powder in Aqueous Systems |
| LIAO Muzi1, HE Liang2,3, WANG Baokai1, NIU Mengyang1, SUN Chang1, YUAN Yunqi1,CAO Wenbin1,*, WANG Qi1,*
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1 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2 School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
3 Beijing New Building Materials Public Limited Company, Beijing 100096, China |
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Abstract Silica (SiO2) aerogel, due to its lightweight, porous structure, unique optical, thermal and acoustic properties, shows great potential for applications in building energy conservation, aerospace, and other fields. However, silica aerogel powder has a large specific surface area, easy to be agglomerated and difficult to disperse in aqueous systems, all of which limit its further application. This study aims to reduce the interactive forces between SiO2 particles and improve their dispersion stability in aqueous media by adding dispersants. The properties of SiO2 aerogels were characterized by scanning electron microscopy and specific surface area, and the dispersion properties of SiO2 aerogels in aqueous systems were evaluated by laser particle size meter and sedimentation test. The study found that anionic and non-ionic dispersants could significantly improve dispersion, while cationic dispersants led to increased agglomeration. By combining dispersants and optimizing the amount of dispersant, the dispersion effect was further optimized. The findings provide a theoretical basis for the application of SiO2 aerogel in aqueous systems.
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Published: 25 December 2025
Online: 2025-12-17
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