Preparation and Characterization of Monodispersed Zinc Oxide Fine Particles in Emulsions

에멀젼을 이용한 단분산 미세 산화아연 입자의 제조 및 특성

  • Ju, Chang Sik (Department of Chemical Engineering, Pukyong National University) ;
  • Ku, Jun Pyo (Department of Chemical Engineering, Pukyong National University)
  • 주창식 (부경대학교 공과대학 화학공학과) ;
  • 구준표 (부경대학교 공과대학 화학공학과)
  • Received : 1998.04.29
  • Accepted : 1998.08.06
  • Published : 1998.11.10

Abstract

An experimental research on the preparation of zinc oxide fine particles in w/o emulsions was conducted. Precipitation solutions were zinc nitrate aqueous solutions with hexamethylenetetramine(HMTA) as precipitant. The precipitation solutions formed stable w/o emulsions with kerosine in the presence of Span 80. Homogeneous precipitation reaction occurred in the w/o emulsion after the resultant w/o emulsion was heated above the decomposition temperature of HMTA and zinc oxide particles were precipitated. In some case, zinc oxide particles of bi-modal distribution were obtained. However, zinc oxide fine particles of narrow particle size distribution could be obtained, even when the initial zinc concentration of precipitation solution and the conversion to zinc oxide are both higher that those in bulk homogeneous precipitation.

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