The Study On Relationship Of The Hydrophobic Surface Nanobubbles Characteristics And Solid-liquid Boundary Slip Length

The nanobubbles were firstly proposed to explain the hydrophobic long-rangeforce mechanism. With the continuous progress of the micro-nano-measurementtechniques and measuring instruments, not only in theory, nanobubbles were alsoimaged in practice. At present, it has been generally recognized that the nanobubblesdo exist.In recent years, along with the deepening research of nanobubbles, a growingnumber of scholars believe that the reason of nanobubbles existence may be boundaryslip in solid-liquid interface. Then a series of related studies on nanobubbles have avery far-reaching significance.At present, the majority research about nanobubbles are still in the explorationstage, and are not clear enough in the exploration of their own characteristics andstability mechanisms. It lacks of experimental validation about the existing relationshipbetween nanobubbles and the boundary slip length of solid-liquid interface. Firstly,this paper studies the relationship between the characteristic parameters of thenanobubbles and external conditions based on accurate imaging of nanobubbles, andproposes two new parameters: the characteristics of uniform size and uniformdistribution, to represents the characterization of nanobubbles itself. And through theexperimental measurements and analysis, the accuracy of these two parameters isverified. Then we use a homemade colloidal probe experiments to measure the sliplength of the solid-liquid interface, and compare the results with the calculated value oftheoretical correction formula that proposed in this paper to prove the feasibility of themodified formula. Finally, on the basis of the experimental phenomena, we proposethe factors that may affect the stability mechanism of nanobubbles, and describe thebasis for this speculation in detail.