Shear rate-dependent structure of polymer-stabilized TiO2 dispersions

被引：0
作者：
Antony Van Dyk
Alan Nakatani
机构：
[1] The Dow Chemical Company,Dow Coating Materials
[2] The Dow Chemical Company,Core R&D Analytical Sciences
来源：
Journal of Coatings Technology and Research | 2013年 / 10卷
关键词：
Titanium dioxide; Dispersion; Dispersant; Rheology; Shear rate; Fractal dimension; Correlation length; Neutron scattering; USANS; Pigment; Slurry; Viscosity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Opacity, gloss, stability, color acceptance, and other paint properties depend on the quality of pigment dispersion. We measured the shear rate-dependent structure of titanium dioxide (TiO2) dispersions stabilized with commercial polymer dispersants in water. Two different MW polyacid dispersants and two different MW acrylate copolymers were used in this study. The experiments were conducted at the NIST Center for Neutron Research on the perfect crystal diffractometer for ultra-high resolution small-angle neutron scattering (USANS) measurements. The results for TiO2 scattering and rheology show that shear induced dissociation occurs for certain dispersants and shear induced association of TiO2 clusters is observed for other dispersants. The results suggest new ways to consider dispersant selection for paints and the quality of pigment dispersions.
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页码：297 / 303
页数：6
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