Evaluation of the surface energy of dispersed aluminium oxide using owens-wendt theory

Authors

DOI:

https://doi.org/10.15587/2312-8372.2020.200756

Keywords:

, aluminium oxide, Owens-Wendt model, Washburn method, surface energy, surface tension.

Abstract

Knowing the value of the surface energy of powder materials allows to predict the interaction of the solid phase with liquids, the formation of stable dispersions, durable and resistant to aggressive factors of composites. The application of the Owens-Wendt model for determining the change in the surface energy of aluminium oxide modified by various water repellents is considered. Also, to determine the contact angle of the surface of the modified material, the Washburn method is used, which consists in determining the rate of capillary rise of the test fluid. This method is chosen due to low requirements in the accuracy of measuring equipment and at the same time shows a high degree of accuracy of the results.

The object of research is a method for determining the surface energy of powder materials, using aluminium oxide modified with polymethylhydrosiloxane as an example. Surface modifications of the aluminium oxide powder are carried out in a xylene suspension.

In the work, the determination of surface energy is carried out in accordance with the Owens-Wendt theory by the graphical method in accordance with the obtained values of the contact angle of the material according to the Washburn method. It is established the shape of the particles of aluminium oxide and their average size, and also calculated the specific surface of the material. A modifier, polymethylhydrosiloxane, is found, with the help of which it is possible to obtain a stable superhydrophobic state, and the optimal concentration by determining the contact angles of the powder material with test liquids according to the method proposed by Washburn.

To increase the accuracy of determining the surface energy of the material according to the Washburn method, a mixture of water with ethanol is used, and the components of surface tension are calculated. It is shown that the values of the contact angle of the surface of the dispersed material obtained using a mixture as a test liquid can be used to calculate the values of the components of the surface energy of aluminium oxide. In this case, there is a lack of error in the form of the Cassie state, which is observed for hydrophobic dispersed materials when using water as a test fluid.

Author Biographies

Oleksiy Myronyuk, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

PhD, Associate Professor

Department of Chemical Technology of Composition Materials

Denys Baklan, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

Postgraduate Student

Department of Chemical Technology of Composition Materials

Lyudmyla Nudchenko, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

Senior Lecturer

Department of Chemical Technology of Composition Materials

References

  1. Chibowski, E., Holysz, L., Szczes, A. (2017). Wettability of Powders. Adhesion in Pharmaceutical, Biomedical and Dental Fields, 23–49. doi: http://doi.org/10.1002/9781119323716.ch2
  2. Zisman, W. A. (1964). Relation of the Equilibrium Contact Angle to Liquid and Solid Constitution. Contact Angle, Wettability, and Adhesion, 1–51. doi: http://doi.org/10.1021/ba-1964-0043.ch001
  3. Good, R. J., van Oss, C. J. (1992). The Modern Theory of Contact Angles and the Hydrogen Bond Components of Surface Energies. Modern Approaches to Wettability, 1–27. doi: http://doi.org/10.1007/978-1-4899-1176-6_1
  4. Chibowski, E., Holysz, L. (1992). Use of the Washburn equation for surface free energy determination. Langmuir, 8 (2), 710–716. doi: http://doi.org/10.1021/la00038a066
  5. Trong, D. V., Hupka, J. (2005). Characterization of porous materials by capillary rise method. Physicochemical Problems of Mineral Processing, 39, 47–65.
  6. Zhang, D., Luo, R. (2017). Development of a method to determine surface energy components of mineral fillers. Construction and Building Materials, 146, 370–380. doi: http://doi.org/10.1016/j.conbuildmat.2017.04.071
  7. Zhang, D., Luo, R. (2019). A novel method for measuring surface free energy of highly wettable mineral powders. Construction and Building Materials, 229, 116915. doi: http://doi.org/10.1016/j.conbuildmat.2019.116915
  8. Zhang, D., Luo, R. (2020). An alternative method to evaluate the surface free energy of mineral fillers based on the generalized Washburn equation. Construction and Building Materials, 231, 117164. doi: http://doi.org/10.1016/j.conbuildmat.2019.117164
  9. Annamalai, M., Gopinadhan, K., Han, S. A., Saha, S., Park, H. J., Cho, E. B. et. al. (2016). Surface energy and wettability of van der Waals structures. Nanoscale, 8 (10), 5764–5770. doi: http://doi.org/10.1039/c5nr06705g
  10. Myronyuk, O., Prydatko, A., Sivolapov, P., Svidersky, V. (2017). Aspects of polymer surfaces wetting. Eastern-European Journal of Enterprise Technologies, 6 (67), 23–26. doi: http://doi.org/10.15587/1729-4061.2014.20797
  11. Zhang, Z., Wang, W., Korpacz, A. N., Dufour, C. R., Weiland, Z. J., Lambert, C. R., Timko, M. T. (2019). Binary Liquid Mixture Contact-Angle Measurements for Precise Estimation of Surface Free Energy. Langmuir, 35 (38), 12317–12325. doi: http://doi.org/10.1021/acs.langmuir.9b01252
  12. Prado, L. A. S. A., Sriyai, M., Ghislandi, M., Barros-Timmons, A., Schulte, K. (2010). Surface modification of alumina nanoparticles with silane coupling agents. Journal of the Brazilian Chemical Society, 21 (12), 2238–2245. doi: http://doi.org/10.1590/s0103-50532010001200010

Published

2020-03-05

How to Cite

Myronyuk, O., Baklan, D., & Nudchenko, L. (2020). Evaluation of the surface energy of dispersed aluminium oxide using owens-wendt theory. Technology Audit and Production Reserves, 2(1(52), 25–27. https://doi.org/10.15587/2312-8372.2020.200756

Issue

Section

Reports on research projects