Water repellent properties of dispersed metals containing low-dimensional forms of ammonium compounds on the surface

24th International Conference on Vacuum Technique and Technology

Syrkov, A.G.^1 ; Kabirov, V.R.^1 ; Silivanov, M.O.^1

Department of General and Technical Physics, Saint Petersburg Mining University, Saint Petersburg

199106, Russia^1

关键词: Acid-base indicators;    Aluminum powders;    Dispersed metals;    Exponential time;    Hydrophilic centers;    Quaternary ammonium compound;    Saturation state;    Water-repellent properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/872/1/012048/pdf
DOI  :  10.1088/1742-6596/872/1/012048

来源: IOP

【 摘 要 】

For the first time the change of the water repellent properties of dispersed copper, modified using quaternary ammonium compounds on 24 h time scale in saturated water vapours was studied. Exponential time dependences of the water repellent properties of dispersed copper with adsopted QAC were derived and characterized. It was established that the samples modified in mixed and consistent modes by both modifiers reach the saturation state faster than others, due to the small number of hydrophilic centers on the surface of metals. The last conclusion was confirmed by the distribution spectra of centers of adsorption, which were obtained by the adsorption of acid-base indicators for more dispersed samples based on aluminum powder.