Effect of static magnetic field on surface charges of solid-liquid interfaces

As the effect of a static magnetic field on the surface charge of solid-liquid interfaces is related to the fluid drag of micro/nano fluidic systems, this paper researches the effects of the static magnetic field on the viscosity of deionized (DI) water and the surface charges of borosilicate glass-DI water interfaces and analyzes the effect mechanism of static magnetic field on the properties of DI water. The experimental results show that when the DI water is exposed in the static magnetic field with a magnetic field intensity of 0 T to 0.6 T for 30 min, the viscosity of DI water decreases with increasing magnetic field intensity and the surface charge density of borosilicate glass-DI water interface increases with the increasing magnetic intensity. The effect mechanisms of static magnetic field on the properties of DI water are the breaking of hydrogen bond and O-H bond caused by the magnetic field. The research indicates that the static magnetic field changes the surface charge properties of solid-liquid interfaces. The research in this paper provides a possible method to control the fluid drag at micro/nano scales using magnetic fields.