Microscopic Spreading Characteristics of Nonpolar Perfluoropolyalkylether Film on Carbon Surfaces

Min Chan Kim; Sang Baek Lee; Saehoon Kim

Journal of Industrial and Engineering Chemistry, Vol.8, No.1, 39-45, January, 2002

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Microscopic Spreading Characteristics of Nonpolar Perfluoropolyalkylether Film on Carbon Surfaces

Min Chan Kim^†, Sang Baek Lee, and Saehoon Kim¹

Department of Chemical Engineering, Cheju National University, Jeju 690-756, Korea
¹Department of Ceramic Engineering, kangnung National University, Kangnung, Kwangwon-do 210-702, Korea

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The surface diffusion characteristics of nonpolar perfluoropolyalkylehter (PFPE) on carbon surfaces are investigated according to the proposed mechanisms. For the submonolayer regime, two dimensional van der Waals equation is employed to determine the dependency of surface diffusion coefficient on the film thickness. The surface diffusion coefficients increase as the film thickness increases. For the multilayer regime, conventional hydrodynamic analysis with position dependent viscosity is applied to investigate the surface diffusion characteristics. The results on the basis of the present theoretical analysis agrees well with the experimental results.

Keywords:microscopic spreading;surface diffusion;two viscosity model;two dimensional van der Waals equation

[References]

Waltman RJ, Pocker DJ, Tyndall GW, Tribol. Lett., 4, 267 (1998)
Teletzke GF, Davis HT, Scriven LE, Chem. Eng. Commun., 55, 41 (1987)
Mate M, J. Appl. Phys., 72, 3084 (1992)
Heslot F, Fraysee N, Cazabat AM, Nature, 338, 640 (1989)
Cazabat AM, Fraysse F, Heslot F, Carles P, J. Phys. Chem., 94, 7581 (1990)
Valignant MP, Fraysee N, Cazabat AM, Heslot F, Langmuir, 9, 601 (1993)
Fraysse F, Valignant MP, Cazabat AM, Heslot F, Livingson P, J. Colloid Interface Sci., 158, 27 (1993)
Kim MC, Jhon MS, Korean J. Chem. Eng., 17(4), 444 (2000)
Novotny VJ, J. Chem. Phys., 92, 3189 (1990)
Min BG, Choi JW, Brown HR, Yoon DY, O'Cornor TM, Jhon MS, Tribol. Lett., 1, 22 (1995)
O'Cornor TM, Ph.D. Thesis, Carnegie Mellon University, PA (1995)
Ma X, Ph.D. Thesis, Carnegie Mellon University, PA (1998)
Matano C, Jpn. J. Phys., 8, 109 (1933)
Tabor D, Winterton RHS, Nature, 219, 1120 (1968)
Marchionni G, Ajroldi G, Cinquina P, Tampelini E, Pezzin G, Polym. Eng. Sci., 30, 829 (1990)
Bird RB, Armstrong RC, Hassager O, Dynamics of Polymeric Liquids, vol. 1, Wiley, New York (1987)
Ferry JD, Viscoelastic Properties of Polymers, Wiley, New York (1970)
Bruinsma R, Macromolecules, 23, 276 (1990)
Adamson AW, Physical Chemistry of Sufraces, 5th Edn., Wiley (1990)
Novotny VJ, Hussla I, Turlet JM, Philport MR, J. Chem. Phys., 90, 5861 (1989)

[Referenced By]

[Related Articles]

[1] Waltman RJ, Pocker DJ, Tyndall GW, Tribol. Lett., 4, 267 (1998)

[2] Teletzke GF, Davis HT, Scriven LE, Chem. Eng. Commun., 55, 41 (1987)

[3] Mate M, J. Appl. Phys., 72, 3084 (1992)

[4] Heslot F, Fraysee N, Cazabat AM, Nature, 338, 640 (1989)

[5] Cazabat AM, Fraysse F, Heslot F, Carles P, J. Phys. Chem., 94, 7581 (1990)

[6] Valignant MP, Fraysee N, Cazabat AM, Heslot F, Langmuir, 9, 601 (1993)

[7] Fraysse F, Valignant MP, Cazabat AM, Heslot F, Livingson P, J. Colloid Interface Sci., 158, 27 (1993)

[8] Kim MC, Jhon MS, Korean J. Chem. Eng., 17(4), 444 (2000)

[9] Novotny VJ, J. Chem. Phys., 92, 3189 (1990)

[10] Min BG, Choi JW, Brown HR, Yoon DY, O'Cornor TM, Jhon MS, Tribol. Lett., 1, 22 (1995)

[11] O'Cornor TM, Ph.D. Thesis, Carnegie Mellon University, PA (1995)

[12] Ma X, Ph.D. Thesis, Carnegie Mellon University, PA (1998)

[13] Matano C, Jpn. J. Phys., 8, 109 (1933)

[14] Tabor D, Winterton RHS, Nature, 219, 1120 (1968)

[15] Marchionni G, Ajroldi G, Cinquina P, Tampelini E, Pezzin G, Polym. Eng. Sci., 30, 829 (1990)

[16] Bird RB, Armstrong RC, Hassager O, Dynamics of Polymeric Liquids, vol. 1, Wiley, New York (1987)

[17] Ferry JD, Viscoelastic Properties of Polymers, Wiley, New York (1970)

[18] Bruinsma R, Macromolecules, 23, 276 (1990)

[19] Adamson AW, Physical Chemistry of Sufraces, 5th Edn., Wiley (1990)

[20] Novotny VJ, Hussla I, Turlet JM, Philport MR, J. Chem. Phys., 90, 5861 (1989)