Studies on Particle Size Control and Stability of Lead Chromate Pigment Particles

크롬산납 무기안료 입자 제어 및 안정성에 관한 연구

  • Park, Chan Kyu (Department of Chemical Engineering, Dong-A University) ;
  • Jung, Dae Yoon (Department of Chemical Engineering, Dong-A University) ;
  • Chang, Sang Mok (Department of Chemical Engineering, Dong-A University) ;
  • Lee, Sang Rok (Department of Chemical Engineering, Dong-A University)
  • 박찬규 (동아대학교 공과대학 화학공학과) ;
  • 정대윤 (동아대학교 공과대학 화학공학과) ;
  • 장상목 (동아대학교 공과대학 화학공학과) ;
  • 이상록 (동아대학교 공과대학 화학공학과)
  • Received : 2007.11.22
  • Accepted : 2008.04.16
  • Published : 2008.06.10

Abstract

For the synthesis of lead chromate pigments, we investigated the characteristics of particle growth with reacting conditions in the synthetic process, the effect of additives, and its micro-capsulation. The more tiny and uniform dispersion particles could be obtained at a lower pH and diluter intial concentration. The variation range of average pigment size was increased with the agitating speed. The pigment size could be controlled by adding aluminum sulfate as an additive, which maintained the optimum particle dispersion. It was found that the optimum micro-capsulation conditions were pH 9~10 and above $90^{\circ}C$ during the micro-capsulation of lead chromate pigment, and below 0.5% humidity after micro-capsulation.

Acknowledgement

Supported by : 동아대학교

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