Abstract
The methodologies of the determination of the free surface energy of solids were analyzed. It was shown that the currently available models for the calculation of free surface energy are based on the measurements of the angles of contact, and they contain an internal contradiction that consists in the fact that the surface energy is divided into two or three components: a polar component, hydrogen bonds, and a dispersion component. The free surface energy was calculated for the metamorphic series of coals from the Donets Basin (long-flame, gas, coke, and lean coals and anthracites) and graphites. Considerable differences in the values of free surface energy for different coalmine beds of anthracites were not revealed. Technical-grade and spectral graphites are insignificantly different from anthracites in terms of free surface energy, but a polar component of free surface energy has lower values of 0.0054–0.0117 J/m2.
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References
Vodopodgotovka: Spravochnik (Water Treatment: A Handbook), Belikov, S.E., Ed., Moscow: Akva-Term, 2007.
Gavrilenko, S.S., Cand. Sci. (Eng.) Dissertation, Moscow, 2014, p. 11.
El’yashevich, M.G., Ofengenden, M.E., and Zubkova, Yu.N., Razrabotka mestorozhdeniya poleznykh iskopaemykh (Field Development of Mineral Deposits), Kiev, 1966, no. 6, p. 5.
El’yashevich, M.G., Zubkova, Yu.N., and Kucher, R.V., Khim. Tverd. Topl. (Moscow), 1967, no. 3, pp. 126–131.
Przhegorlinskaya, R.V. and Zubkova, Yu.N., Khim. Tverd. Topl. (Moscow), 1978, no. 5, p. 125.
Zubkova, Yu.N., Extended Abstract of Cand. Sci. (Chem.) Dissertation, Donetsk: Don. State Univ., 1968.
Lopanov, A.N. and Zubkova, Yu.N., Koks Khim., 1980, no. 7, p. 9.
Zenkiewicz, M., J. Achi. Mater. Manufact. Eng., 2007, vol. 24, no. 1, p. 137.
Snycheva, E.V., Nauchn. Vestn. Voronezhsk. Gos. Arkhitekturno- Stroit. Univ., 2012, no. 5, p. 22.
Mironyuk, A.V., Pridatko, A.V., Sivolapov, P.V., and Sviderskii, V.A., Vostochno-Evrop. Zh. Peredovykh Tekhnol., 2014, no. 1, p. 23.
Sharfrin, E. and Zisman, W.A., J. Phys. Chem., 1960, vol. 64, no. 5, p. 519.
Van Oss, C.J., Chaudhury, M.K., and Good, R.J., Chem. Rev., 1988, vol. 88, p. 927.
Shchukin, E.D., Pertsev, A.V., and Amelina, E.A., Kolloidnaya khimiya (Colloid Chemistry), Moscow: Vysshaya Shkola, 2004, 3rd ed., p. 45.
Toussaint, A. F. and Luner, P., Contact Angle, Wettabiliry and Adhesion, Mittal, K. L., Ed., Utrecht: VSP, 1993, p. 385.
Yu, J., Wang, H., and Liu, X., Int. J. Heat Mass Transfer, 2013, vol. 57, p. 299.
Hu, J., Xiao, X.D., and Salmeron, M., Appl. Phys. Lett., 1995, vol. 67, p. 476.
Jung, Y.C. and Bhushan, B., J. Vacuum Sci. Technol. A, 2008, vol. 26, p. 777.
Dausheva, M.R. and Songina, O.A., Usp. Khim., 1973, vol. 42, no. 2, p. 323.
Lopanov, A.N., Extended Abstract of Doctoral (Eng.) Dissertation, St. Petersburg: St. Petersburg State Techn. Univ., 2004.
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Original Russian Text © A.N. Lopanov, E.A. Fanina, K.V. Tikhomirova, 2018, published in Khimiya Tverdogo Topliva, 2018, No. 1, pp. 16–21.
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Lopanov, A.N., Fanina, E.A. & Tikhomirova, K.V. Calculation of the Free Surface Energy of Coals from the Donets Basin and Graphites. Solid Fuel Chem. 52, 15–20 (2018). https://doi.org/10.3103/S0361521918010068
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DOI: https://doi.org/10.3103/S0361521918010068