Investigation on the characteristics of dispersion mass transfer associated matter in the silicone oil and water interface

Abstract

In this manuscript, taking into account the dispersion mass transfer reported in the previous article, the main features of the associated matter in the interface region during the mass transfer process were further investigated (In the study of dispersion mass transfer, the interface associated matter is considered to be a mixture containing both water and silicone oil components. It has a loosely network-like microstructure and exists in the mesoscopic interface region between silicone oil and water.). Especially the structural characteristics of interface associated matter, the transfer and distribution characteristics of associated matter in the interface region, and the influence of the distribution characteristics of the associated matter on the interface pressure were investigated. For the structural characteristics of the associated matter, a structural observation experiment was carried out using a Cryo-scanning electron microscope (Cryo-SEM) to observe its microstructure characteristics, and the intrinsic composition of the interface associated matter was analyzed using Energy Dispersive Spectrometer (EDS). According to the distribution characteristics of the associated matter in the interface region, a Cryo-SEM was used to observe the higher magnification and measure the distance between the silicone oil phase and the water phase in the interface region, that is, the distribution characteristics. According to the distribution characteristics of the associated matter in the interface region, the influence degree of the compression directions on the interface pressure is different when the associated matter is compressed, and an upgraded dual interface pressure synchronous measuring device (DIMD) is designed and fabricated to simultaneously measure interface pressures in different compression directions. The results show that the associated matter of the interface region exhibits obvious network structure characteristic which is significantly different from water and silicone oil, and the EDS test shows that the silicone component has accumulated in the interface region. When the associated matter is formed in the interface region, it will be closer to the silicone oil under the attraction, which indicates that the associated matter is more likely to migrate to the silicone oil in the interface region to alienate the water. The measured interface pressure in different compression directions is different, and the interface pressure of the compressed water -silicone oil is greater than the interface pressure of the compressed silicone oil - water.