화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.30, No.3, 733-738, March, 2013
DOI10.1007/s11814-012-0195-9  Export Citation
Effect of silica nanoparticles on the phase inversion of liquid-liquid dispersions
Maliheh Raji Asadabadi, Hossein Abolghasemi†, Mohammad Ghannadi Maragheh1, and Payman Davoodi Nasab
  • School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
  • 1Faculty of Nuclear Engineering and Physics, Amir Kabir University, Tehran, Iran
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The effect of silica nanoparticles on phase inversion of liquid-liquid dispersions in a stirred vessel was investigated. The studied systems were toluene dispersed in water and vice versa. In the first set of experiments, phase inversion behavior of systems without Silica nanoparticles was evaluated and subsequent experiments were conducted in the presence of the nanoparticles. For this purpose, Silica nanoparticles of different concentrations (0.01, 0.03, 0.05, 0.07 wt%) were dispersed in water. The nanofluid stability was examined using an ultraviolet-visible (UV-vis) spectrophotometer. The results indicated that increase in silica nanoparticle concentrations up to 0.07 wt% led to increase in agitation speed of phase inversion 43-53.5% and 38.5-45% in the case of O/W and W/O dispersions, respectively. Consequently, the tendency of dispersions to inversion diminished as nanoparticle concentrations increased. Finally, 0.05 wt% of silica nanoparticle was selected as the optimum on the range studied.
Keywords:Phase Inversion;Dispersion;Nanoparticle;Agitation Speed;Holdup
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