TiO2 나노 분말의 분산 안정성 및 침강 특성
Stability and Sedimentation Properties of TiO2 Nanoparticles
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Abstract
In this study, the colloidal stability and sedimentation behavior of crystalline TiO2 particles (300 nm) in various organic solvents have been investigated by means of a backscattered light flux profile (Turbiscan). The backscattered light flux profiles revealed that the TiO2 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 TiO2 nanoparticles were hardly observed in isopropyl alcohol. The migration velocities of the TiO2 particle were measured as around 6.15 m/min, 12.53 m/min, 6.51 m/min, and 0.18 m/min for water, methyl alcohol, ethyl alcohol, and isopropyl alcohol, respectively, showing a remarkably slow migration of the TiO2 particles in isopropyl alcohol.
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