Determination of reliable Lewis acid.base surface tension components of a solid in LW.AB approach

Geelsu Hwang; Chang-Ha Lee; Ik-Sung Ahn; Byung Jin Mhin

Journal of Industrial and Engineering Chemistry, Vol.17, No.1, 125-129, January, 2011

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Determination of reliable Lewis acid.base surface tension components of a solid in LW.AB approach

Geelsu Hwang, Chang-Ha Lee , Ik-Sung Ahn^†, and Byung Jin Mhin¹

Department of Chemical Engineering, Yonsei University, Seoul 120-749, South Korea
¹Division of Molecular Science, Pai Chai University, Daejeon 302-735, South Korea

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In the Lifshitz-van der Waals/Lewis acid.base (LW-AB) approach, the interaction between a solid and a liquid is described mathematically as the geometric mean of their surface tension components. The surface tension components of the solid (γ(s)LW, γ(s)+, and γ(s)-) are determined by measurement of the contact angles for various liquids whose surface tension components (γ(l)LW, γ(l)+, and γ(l)-) are known. One of the two AB surface tension components of a solid (γ(s)+, and γ(s)-) is often calculated to have a negative square root. In the conventional LW-AB approach, it has been assumed to be zero, which leads to the inaccurate evaluation of not only the other surface tension component but also the total interfacial Gibbs energy. In this study, the equations expressing the relationship between solid surface tension components and liquid surface tension components were plotted for various contact angles. The plots showed that a large deviation could occur in the values of γ(s)LW, √γ(s)+,and √γ(s)-, depending on the type of apolar liquid. Also it was found that there could be combinations of three liquids allowing the meaningful non-negative values for √γ(s)+, and √γ(s)-.

Keywords:LW-AB approach;Graphical analysis;Surface tension components;Contact angles

[References]

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Berthelot D, Compt. Rend., 126, 1857 (1898)
Sharma PK, Hanumantha Rao K, Adv. Colloid Interface Sci., 98, 341 (2002)
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van der Mei HC, Bos R, Busscher HJ, Colloids. Surf. B., 11, 213 (1998)

[Related Articles]

[1] Young T, Philos. Trans. R. Soc. (Lond.), 95, 65 (1805)

[2] Berthelot D, Compt. Rend., 126, 1857 (1898)

[3] Sharma PK, Hanumantha Rao K, Adv. Colloid Interface Sci., 98, 341 (2002)

[4] van Oss CJ, Chaudhury MK, Good RJ, Adv. Colloid Interface Sci., 28, 35 (1987)

[5] van Oss CJ, Good RJ, Chaudhury MK, Sep. Sci. Technol., 22, 1 (1987)

[6] van Oss CJ, Chaudhury MK, Good RJ, Chem. Rev., 88, 927 (1988)

[7] van Oss CJ, Colloids Surf. A., 78, 1 (1993)

[8] van Oss CJ, Interfacial Forces in Aqueous Media, 2nd edn, Taylor & Francis, New York (2006)

[9] van Oss CJ, Colloids Surf. B., 5, 91 (1995)

[10] Hermansson M, Colloids Surf. B., 14, 105 (1999)

[11] van Loosdrecht MCM, Lyklema J, Norde W, Zehnder AJB, Microb. Ecol., 17, 1 (1989)

[12] Strevett KA, Chen G, Res. Microbiol., 154, 329 (2003)

[13] Good RJ, Chaudhury MK, van Oss CJ, in: Lee LH (Ed.), Fundamentals of Adhesion, Plenum Press, New York (1991)

[14] Jasper JJ, J. Phys. Chem. Ref. Data., 1, 841 (1972)

[15] van der Mei HC, Bos R, Busscher HJ, Colloids. Surf. B., 11, 213 (1998)