Solid film zeta potential meter

Zeta100 is an instrument developed by Dandong Baite Instrument Co., Ltd. that integrates zeta potential, nanoparticle size distribution, and molecular weight measurement to characterize nanoparticle size and stability. Zeta potential measurement uses the principle of electrophoretic light scattering (ELS) to obtain the Zeta potential by measuring the velocity of particles in an electric field. Generally speaking, the higher the zeta potential, the more intense the mutual repulsion between particles, and the more stable the dispersed system. The nanoparticle size distribution adopts the principle of dynamic light scattering (DLS), where particles undergo Brownian motion in suspension and are smaller in size

Our company's solid surface Zeta potential meter can be used to determine the solid-liquid interface electrical properties (Zeta potential) of dispersed system particles, as well as to measure the interface electrical properties of emulsion droplets. It can also be used to determine the isoelectric point and study the mechanism of interface reaction processes. Measuring the Zeta potential of particles to determine their isoelectric point is an important method for understanding the surface electrical properties of particles, and it is also an important means in particle surface treatment. Compared with other similar instruments at home and abroad, it has significance. It can be widely used in industries such as cosmetics, mineral processing, papermaking, medical and health care, building materials, ultrafine materials, environmental protection, marine chemistry, etc. It is also one of the important teaching instruments for majors such as chemistry, chemical engineering, medicine, and building materials.

In the electrochemical double current layer model, the charge distribution forms a fixed layer and a movable layer. The sliding layer separates these two layers from each other. The ZETA potential is specified as the attenuation of the potential between the solid surface and the liquid phase on the sliding layer. The external force of electrolyte flow is applied parallel to the solid liquid interface, resulting in relative motion and charge separation between the fixed layer and the movable layer, from which the experimental ZETA potential is obtained. The magnitude of the flow potential is determined by the flow pressure difference P of the liquid phase. The ZETA potential can be defined as the potential between the fixed layer charge on the solid surface and the ion moving layer, with a corresponding flow potential coefficient of dU/dP. The ZETA potential is expressed as: