Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
권호 표지

Influence of the Surface Energetics on flotation Process - Importance of the Surface Energy and Polarity of Solid Particles in Flotation Efficiency -

부유부상 공정에 있어서 표면 에너지의 역할 - 부유부상 효율에 있어 고형 입자의 표면 에너지 및 극성성분의 중요성 -

  • Lee, Hak-Rae (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University) ;
  • Park, Il (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University) ;
  • Lee, Yong-Min (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University) ;
  • Lee, Jin-Hee (Department of Forest Products, College of Agricultural and Life Sciences, Seoul National University) ;
  • Cho, Joong-Yeon (Department of Paper Technology) ;
  • Han, Sin-Ho (Dept. of Chemical Engineering, Korea Polytechnic University)
  • 이학래 (서울대학교 농업생명과학대학 임산공학과) ;
  • 박일 (서울대학교 농업생명과학대학 임산공학과) ;
  • 이용민 (서울대학교 농업생명과학대학 임산공학과) ;
  • 이진희 (서울대학교 농업생명과학대학 임산공학과) ;
  • 조중연 (용인송담대학 제지.패키징시스템과) ;
  • 한신호 (한국산업기술대학 화학공학과)
  • Published : 2002.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

The object of this study was to determine the surface energy of hydrophobically modified micro-crystalline cellulose (MCC) with AKD and evaluate the effect of surface energy of the solid particles dispersed in aqueous medium on flotation efficiency. Especially to eliminate the complication derives from the diverse parameters of solid particles including particle size, type, etc. MCC's modified with AKD have been used. The surface energy Parameters were calculated from advancing contact angles of apolar and polar liquids on MCC pellets using the Lifshitz-van der Waals acid-base (LW:AB) approach. Total surface energy of hydrophobic MCC ranged from 46.19 mN/m to 48.60 mN/m. The contribution of the acid-base components to the total surface energy ranged form 13% to 17% for hydrophobic MCC's. The effect of surface characteristics on the flotation efficiency was evaluated. It was shown that there exist critical values of surface energies to increase flotation efficiency. Total surface energy and polar component of solid particles should be lower than 47 mN/m and 7 mN/m, respectively, for effective removal in the flotation process.

Keywords

References

  1. Wood Fiber Sci. J. v.28 Application of the Lifshitz-van der waals acid-base approach to determine wood surface tension components Gardner, D. J.
  2. Colloid Interf. Sci. J. v.181 comparison of methods to calculate the surface free energe of wood using contact angle measurements Gindl, M.;Sinn, G.;Gindl, W.;Reiterer, A.;Tschegg, S. A.
  3. Colloid Interf. Sci. J. v.211 Some remarks on the components of the liquid surface free energe Janczuk, B.;Bialopiotrowicz, T.;Zdziennicka, A.
  4. Chem. Rev. v.88 Monopolar surfaces Van Oss, C. J.;M. K. Chaudhury;R. J.;Good
  5. Adlhesion J. v.63 Change in Surface properties of solids caused by grinding Van Oss, C. J.;Giese, R. F.;Wu, W.
  6. Wettability and Adhesion Contact Angle Luner, P.;Mittal, K. L.(ed.)
  7. Colloid Interf. Sci. J. v.181 Characterization of the surface free energy of cellulose ether films Luner, P.;Oh, E.
  8. 펄프종이기술 v.33 no.1 부유부상 공정에 대한 표면화학적 연구-부유부상 효율과 고형 입자의 소수화도 이학래;이진희;허용성;조중연;한신호
  9. 펄프종이기술 v.34 no.3 인버스 가스 크로마토그래피를 이용한 소수화된 MCC의 표면 특성 분석 이학래;이용민;이진희;박일;조중연;한신호