Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Stability and Sedimentation Properties of TiO2 Nanoparticles

TiO2 나노 분말의 분산 안정성 및 침강 특성

  • 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)
  • 우승희 (한국원자력연구소, 원자력나노소재응용랩) ;
  • 이민구 (한국원자력연구소, 원자력나노소재응용랩) ;
  • 이창규 (한국원자력연구소, 원자력나노소재응용랩)
  • Published : 2006.08.01
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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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