Research and Analysis on Dispersing Performance of Nano-TiO₂ Powder in Water

Abstract:

Due to the characteristics such as fine grain, large surface area, high surface free energy and serious insufficient of atomic coordinate, nanoTiO₂ is easy to conglobated in solution and further affect its application seriously. The agglomerate mechanism of nanoTiO₂ in solution was studied and the reason of agglomeration was analyzed. Experiments were conducted to research the influence law on dispersing stability of nanoTiO₂ powder in water by factors of dispersant type, dispersant content and dispersing process of ultrasonic dispersing and high-speed stirring. The dispersing stability of nanoTiO₂ powder in water is evaluated by combining gravity deposition method with electronic microscopy analysis. According to the research, dispersant type and dispersant mixing amount have great influence on the dispersing property of nanoTiO₂ powder, and the inorganic dispersant sodium tripolyphosphate achieved better dispersing effect. Furthermore, ultrasonic dispersing and high-speed stirring can improve the dispersing stability of nanoTiO₂ powder and after high-speed stirring at first and then ultrasonic dispersing, the dispersing effect of nanoTiO₂ powder is much better.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 530-537
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.530
• Online since: April 2016
• Authors: Ya Chuan Kuang, Wen Lei Liang, Xiao Yong Ji
• Keywords: Dispersing Agent, Dispersing Stability, High-Speed Stirring, Nano-TiO₂, Ultrasonic Dispersing

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