NDLI: Wettability study for pigmentary titanium dioxide

Content Provider	Springer Nature Link
Author	Abrahao, R. T. Postal, V. Paiva, J. L. Guardani, R.
Copyright Year	2013
Abstract	Wetting is the first step in the dispersion process of any powder. Understanding how the powder surface and the liquid properties affect the speed and intensity of the wetting process provides a set of tools to determine the dispersion efficiency as a whole, and an effective dispersion allows the reduced use of the powder to achieve the specified final properties. This article reports experimental results on the wetting behavior of five different TiO$_{2}$ samples by liquids with different values of surface tension [deionized (DI) water and DI water containing surfactants] and its effect on the dispersion process. The selection of the TiO$_{2}$ samples was based on different particles sizes with similar surface properties, and similar sizes with different surface properties. The samples were characterized in terms of their specific surface area and particle size distribution. The wetting behavior was evaluated by a capillary rise technique (Washburn) to measure liquid penetration height and rate, and the time evolution of the particle size distribution. The results show that larger particles presented faster wettability and that liquids with lower surface tension facilitate the wetting of the powder. The energy required to deagglomerate the powder is inversely proportional to the wetting speed: the faster the wetting the easier it will be to disperse the particles, with less energy required.
Starting Page	829
Ending Page	840
Page Count	12
File Format	PDF
ISSN	15470091
Journal	JCT Research
Volume Number	10
Issue Number	6
e-ISSN	19353804
Language	English
Publisher	Springer US
Publisher Date	2013-10-01
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pigmentary Titanium dioxide Wettability Deagglomeration Dispersion Tribology, Corrosion and Coatings Surfaces and Interfaces, Thin Films Polymer Sciences Industrial Chemistry/Chemical Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Colloid and Surface Chemistry Surfaces and Interfaces

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