ГИДРОФОБНЫХ ПОВЕРХНОСТНЫХ СОЕДИНЕНИЙ МЕТАЛЛОВ ТВЕРДОТЕЛЬНЫМ СИНТЕЗОМ С ПРИМЕНЕНИЕМ КРЕМНИЙГИДРИДНЫХ РЕАГЕНТОВ

Abstract

A study of the formation of hydrophobic properties of dispersed metal samples (Ni, Fe, Cu, Al) obtained by different methods was carried out. The methods used are based on chemical processes, including chemisorption and reduction, during the interaction of a solid with gaseous modifier substances. The time dependence in the interval 24-216 (h) of the sorption of water (a) from saturated vapor on samples of copper powder (PMS-1) coated with ammonium preparations (Triamon and Alkamon) was studied. For the first time, the dependence of the sorption rate da/dt for the named samples was obtained and approximated by an equation based on the Gaussian function. Using XPS spectroscopy, structural changes in the surface of modified dispersed aluminum (PAP-2) were revealed upon interaction with water vapor. The binding energies of the O1s oxygen peaks (531.2; 531.5 eV), reflecting this interaction, were determined and assigned. There is no noticeable oxidation of aluminum on the surface. It was revealed that after 10 days of interaction with saturated water vapor, the proportion of aluminum atoms on the surface of the powder modified with vapors of organosilicon liquid based on ethyl hydride siloxane increases. It is assumed that the observed effect is due to the “pushing out” of water molecules from the hydrophobized surface during prolonged treatment, which is confirmed by the graph of the experimental dependence a=f(t). The higher hydrophobicity of metal products of solid- state hydride synthesis compared to industrial nickel and copper powders modified from the gas phase with known water-repellent agents based on ammonium and organosilicon compounds was experimentally confirmed. An explanation was proposed for the decrease in nonlinear effects in the time dependences of a(t) for dispersed metals – products of solid-state hydride synthesis.