Open AccessUse of microcoagulation effect to control water binding in a heterogeneous polymethylsiloxane/silica/water system
Author(s) -
В. В. Туров,
И. И. Геращенко,
T. V. Кrupskaya,
N. Yu. Klymenko,
K. O. Stepanuk
Publication year - 2020
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.21.1.132-139
Subject(s) - composite number , adsorption , chemical engineering , binding energy , materials science , spectroscopy , bound water , properties of water , surface energy , composite material , chemistry , molecule , organic chemistry , physics , quantum mechanics , nuclear physics , engineering
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.