Use of microcoagulation effect to control water binding in a heterogeneous polymethylsiloxane/silica/water system

  • V. V. Turov Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • I. I. Gerashchenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • T. V. Krupskaya Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • N. Yu. Klymenko Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • K. O. Stepanuk Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
Keywords: 1H-NMR spectroscopy, silica, methylsiloxane, decamethoxin, microcoagulation

Abstract

The binding of water in heterogeneous systems containing polymethylsiloxane (PMS) pyrogenic nanosilica (A-300) water and the surface-active substance decametoxin (DMT) was studied. Composite systems were created using metered mechanical loads. The low-temperature 1H NMR spectroscopy was used to measure the structural and thermodynamic parameters of bound water. It is shown that when filling PMS interparticle gaps with hydrocompaction, the interfacial energy of water in the interparticle gaps of hydrophobic PMS with the same hydration is twice as large as the interfacial energy of water in hydrophilic silica A-300. This is due to the smaller linear dimensions of the interparticle gaps in the ICP compared with the A-300. In the composite system, A-300/PMS/DMT/H2O, a non-additive growth of water binding energy is observed, which is likely due to the formation, under the influence of mechanical load in the presence of water, of microheterogeneous sites, consisting mainly of the hydrophobic and hydrophilic components (microcoagulation). Thus, using mechanical loads, you can control the adsorption properties of composite systems.

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Published
2020-03-29
How to Cite
Turov , V. V., Gerashchenko, I. I., Krupskaya, T. V., Klymenko, N. Y., & Stepanuk, K. O. (2020). Use of microcoagulation effect to control water binding in a heterogeneous polymethylsiloxane/silica/water system. Physics and Chemistry of Solid State, 21(1), 132-139. https://doi.org/10.15330/pcss.21.1.132-139
Section
Scientific articles