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http://dx.doi.org/10.4150/KPMI.2006.13.4.263

Stability and Sedimentation Properties of TiO2 Nanoparticles  

Woo S.H. (Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute)
Lee M.K. (Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute)
Rhee C.K. (Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute)
Publication Information
Journal of Powder Materials / v.13, no.4, 2006 , pp. 263-268 More about this Journal
Abstract
In this study, the colloidal stability and sedimentation behavior of crystalline $TiO_2$ particles (300nm) in various organic solvents have been investigated by means of a backscattered light flux profile (Turbiscan). The backscattered light flux profiles revealed that the $TiO_2$ nanoparticles were readily sedimented in water, methyl alcohol, and ethyl alcohol due to a flocculation-induced particle growth, while a particle coalescence and a sedimentation of the $TiO_2$ nanoparticles were hardly observed in isopropyl alcohol. The migration velocities of the $TiO_2$ particle were measured as around 6.15/min, 12.53 m/min, 6.51m/min, and 0.18m/min for water, methyl alcohol, ethyl alcohol, and isopropyl alcohol, respectively, showing a remarkably slow migration of the $TiO_2$ particles in isopropyl alcohol.
Keywords
$TiO_2$; Sedimentation; Stability; Turbiscan;
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