Investigation into acid­basic equilibrium on the surface of oxides with various chemical nature

Authors

DOI:

https://doi.org/10.15587/1729-4061.2017.108946

Keywords:

oxide filler, composite material, surface-active center, acid-base equilibrium

Abstract

The acid-base equilibrium on the surface of CaO, MgO, FeO, Al2O3, Fe2O3, SiO2, TiO2 oxides was studied. As a result of the study, the main provisions have been formulated which made it possible to propose models of surface active centers and schemes of their acid-base equilibrium. The acid-base and energy equilibrium parameters of the active centers in the deprotonation reactions were calculated. Regularities of changes in the acid-base and energy parameters of the active centers were determined depending on the nature of the central element of the crystal lattice, the number of OH-groups and the number of hydration. Acidity of all considered types of active centers depends to a large extent on the nature of the central element, namely its charge and coordination number. It was found that with increase in the coordination number of the central elements with the same charge, pKa of anhydrous centers and the value of their Gibbs free energy in deprotonation reactions increase. Acidity of isolated anhydrous centers increases in a direct proportion as the number of OH groups increases. The obtained regularity preserves for the surfaces of all oxides considered. It was shown for all oxides that when the amount of adsorbed water molecules increases, acidity of the active centers of all types increases and this dependence is identical to the growth of acidity with an increase in the number of OH groups. This indicates identity of the nature of acidity growth with an increase in thickness of hydroxyl and hydration surface layers. The obtained results will ensure prediction of oxide filler behavior in compositions and adjustment of operating properties of composite materials

Author Biographies

Yuliya Danchenko, Kharkiv National University of Civil Engineering and Architecture Sumska str., 40, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of General Chemistry

 

Vladimir Andronov, National University of Civil Protection of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

Doctor of Technical Sciences, Professor

Research Center

Evgeniy Rybka, National University of Civil Protection of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD

Research Center

Stanislav Skliarov, National University of Civil Protection of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD

Research Center

References

  1. Thomas, S., Valsaraj, S. V., Zaikov, G. E. (2009). Resent Advances in Polymer nanocomposites. Boston: Leiden, 527. doi: 10.1163/ej.9789004167261.i-528
  2. Li, F.-Z., Lu, Z.-L., Yang, Z.-H., Qi, K. (2015). Surface interaction energy simulation of ceramic materials with epoxy resin. Polimery, 60 (07/08), 468–471. doi: 10.14314/polimery.2015.468
  3. Kudina, E. F. (2017). Influence of silicate containing fillers on properties of composities based on functionalized epoxy resin. Polymer materials and technologies, 3 (2), 49–55.
  4. Zapata-Massot, C., Le Bolay, N. (2007). Effect of the Mineral Filler on the Surface Properties of Co-Ground Polymeric Composites. Particle & Particle Systems Characterization, 24 (4-5), 339–344. doi: 10.1002/ppsc.200701136
  5. Andronov, V. A., Danchenko, Yu. M., Skripinets, A. V., Bukchman, O. M. (2014). Efficiency of utilization of vibration-absorbing polimer coating for reducing local vibration. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 6, 85–91.
  6. Storozhuk, I. P., Pavlyuchovich, N. G. (2017). Primenenie tiokolo-ehpoksidnyh kompoziciy v kachestve gidroizolyacionnyh i zashchitnyh pokrytiy. Polimernye materialy i tekhnologiy, 3 (1), 75–77.
  7. Danchenko, Yu. M., Popov, Yu. V., Barabash, O. S. (2016). Vplyv kyslotno-osnovnykh vlastyvostei poverkhni poli mineralnykh napovniuvachiv na strukturu ta kharakterystyky epoksykompozytiv. Voprosy himiy i himicheskoy tekhnologiy, 3, 53–60.
  8. Miller, C. M. (2010). Adhesion and the surface energy components of natural minerals and aggregates. Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirement for the degree of Master of Science, 218.
  9. Danchenko, Yu. M. (2017). Regulation of free surface energy of epoxy polymer materials using mineral fillers. Polymer materials and technologies, 3 (2), 56–63.
  10. Tarasevich, Yu. I. (2011). Poverhnostnye yavleniya na dispersnyh materialah. Kyiv: Nauk. dumka, 390.
  11. Ikonnikova, K. V., Ikonnikova, L. F., Koltunova, E. A. (2015). Ocenka vlagopogloshchayushchey sposobnosti zhelezooksidnyh pigmentov metodom rN-metriy. Fundamental'nye issledovaniya, 2, 2134–2137.
  12. Ekimova, I. A., Minakova, T. S. (2013). Adsorbcionnye issledovaniya parov vody na oksidah i ftoridah shchelochnozemel'nyh metallov i magniya. Vestnik TGASU, 2, 263–275.
  13. Weissenbach, K., Mack, H. (2005). Silane Coupling Agents. Functional Fillers for Plastics, 57–83. doi: 10.1002/3527605096.ch4
  14. Sitnikov, P. A., Ryabkov, Yu. I., Ryazanov, M. A., Belyh, A. G., Vaseneva, I. N., Fedoseev, M. S., Tereshatov, V. V. (2013). Vliyanie kislotno-osnovnyh svojstv poverhnosti oksida alyuminiya na reakcionnuyu sposobnost' s ehpoksidnymi soedineniyami. Izvestiya Komi nauchnogo centra UrO RAN, 3 (15), 19–26.
  15. Sorochkina, E. A., Smotraev, R. V., Kalashnikov, Yu. V., Gruzdeva, E. V. (2013). Kislotno-osnovnye svoystva poverhnosti sfericheski granulirovannyh sorbentov na osnove gidratirovannyh oksidov cirkoniya i alyuminiya. Voprosy himiy i himicheskoy tekhnologiy, 6, 102–104.
  16. Ikonnikova, K. V., Ikonnikova, L. F., Minakova, T. S., Sarkisov, Yu. S. (2011). Teoriya i praktika rN-metricheskogo opredeleniya kislotno-osnovnyh svojstv poverhnosti tverdyh tel. Tomsk: Izd-vo Tomsk. politekhn. un-ta., 85.
  17. Chukin, G. D. (2008). Himiya poverhnosti i stroenie dispersnogo kremnezema. Moscow: Tipografiya Paladin, OOO «Printa», 172.
  18. Brehy, V. V. (2008). Korrelyaciya mezhdu siloy osnovnyh centrov katalizatorov i ih aktivnost'yu v testovoy reakciy razlozheniya 2-metil-3-butin-2-ola. Teoreticheskaya i ehksperimental'naya himiya, 44 (5), 310–314.
  19. Kravchenko, A. A., Demianenko, Ye. M., Hrebeniuk, A. H., Lobanov, V. V. (2014). Kvantovokhimichne modeliuvannia protolitychnoi rivnovahy poverkhni kremnezemu. Khimiya, fizyka ta tekhnolohiya poverkhni, 5 (1), 16–22.
  20. Gun'ko, V. M. (2010). Kvantovohimicheskiy analiz adsorbciy i mekhanizmov himicheskih reakciy na poverhnosti tverdyh tel. Khimiya, fizyka ta tekhnolohiya poverkhni, 1 (1), 5–18.
  21. Danchenko, Yu. M. (2017). Influence of chemical nature disperse oxide materials on acide-base properties of the surface centers of Brensted’s. Slovak international scientific journal, 7, 15–22.
  22. Danchenko, Yu. M. (2016). Quantum chemical modeling protolytic equilibrium on surface oxide materials. The Second NZAAR International Event Series on Natural and Build Environment, Cities, Sustainability and Advanced Engineering, 104–108.
  23. Marakushev, A. A. (1982). Kislotno-shchelochnye svojstva himicheskih ehlementov. Kislotno-osnovnye svoystva himicheskih ehlementov, mineralov, gornyh porod i prirodnyh rastvorov. Moscow: «Nauka», 5–39.

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Published

2017-08-29

How to Cite

Danchenko, Y., Andronov, V., Rybka, E., & Skliarov, S. (2017). Investigation into acid­basic equilibrium on the surface of oxides with various chemical nature. Eastern-European Journal of Enterprise Technologies, 4(12 (88), 17–25. https://doi.org/10.15587/1729-4061.2017.108946

Issue

Vol. 4 No. 12 (88) (2017): Materials Science

Section

Materials Science

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Copyright (c) 2017 Yuliya Danchenko, Vladimir Andronov, Evgeniy Rybka, Stanislav Skliarov

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