Features of the formation of the composite system polymethylsiloxane/silica/water in the presence of a surfactant — decamethoxine

1Turov, VV
Gerashchenko, II
1Krupska, TV
Stepanuk, KO
1O. O. Chuiko Institute of Surface Chemistry of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2019, 5:82-90
https://doi.org/10.15407/dopovidi2019.05.082
Section: Chemistry
Language: Russian
Abstract: 

The method of low-temperature 1H NMR spectroscopy is used to study the binding of water in hydrated powders of polymethylsiloxane and silica and in the composite system PMS/SiO2/decametoxine/H2O. It is shown that, when filling interparticle gaps in the PMP by the method of hydro-seaming, the interfase energy of water in the interparticle gaps of a hydrophobic PMS with the same hydration is twice the interphase energy of water in hydrophilic silica. In the composite system PMS/SiO2/decametoxine/H2O, there is a nonadditive increase in the energy of water binding, which is probably due to the formation of the effect of mechanical loading in the presence of water microheterogeneous areas consisting predominantly of hydrophobic and hydrophilic components. Thus, by means of mechanical loads, as well as by adding a surfactant, it is possible to control the adsorption and hydration properties of composite systems.

Keywords: decametoxine, hydrophilic silica, methylsilica, polymethylsiloxane
References: 

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