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- TiO2 나노 분말의 분산 안정성 및 침강 특성
- 우승희, 이민구, 이창규
- Stability and Sedimentation Properties of TiO2 Nanoparticles
- S.H. Woo, M.K. Lee, C.K. Rhee
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Journal of Korean Powder Metallurgy Institute 2006;13(4):263-268
DOI: https://doi.org/10.4150/KPMI.2006.13.4.263
2한국원자력연구소, 원자력나노소재응용랩
3한국원자력연구소, 원자력나노소재응용랩
1Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute
2Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute
3Nuclear Nanomaterials Development Lab., Korea Atomic Energy Research Institute
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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.
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