Method and special device for stirring induced centrifugal force-vertical filtration and purification of silver nanowire mother liquor

Abstract

The invention discloses a method and a special device for stirring induced centrifugal force-vertical filtration and purification of silver nanowire mother liquor. In the method, silver nanowire mother liquor and a solvent are continuously and dynamically injected into a vertical filter membrane cavity of the special device, liquid in the cavity is driven to rotate through stirring, and dynamic centrifugal force is generated to throw mixed liquid to the wall of a vertical filter membrane; then the organic and inorganic impurities are extruded out of the vertical filter wall through filter membrane micro-nano holes by generating positive pressure on the filter wall, and the silver nanowires are left on the inner side of a cavity of the vertical filter membrane; then the silver nanowires are stripped from the filter membrane and continue to be dispersed in the solution, a vertical filter membrane structure is combined, filter cakes or solid accumulation is avoided, and meanwhile purification and dispersion of the silver nanowires are achieved; finally, by discharging the redundant solvent, concentration and phase change of the silver nanowire dispersion liquid are realized. The filtering rate can be optimized by adjusting the aperture of the filter membrane, the stirring rotating speed, the mother liquor concentration, the stirring paddle structure and the like, the purification efficiency of the silver nanowires is improved, the quality and stability of the silver nanowire dispersion liquid are improved, and the production cost of the silver nanowire ink is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of filtration and purification of nanomaterials. The centrifugal force is generated by stirring, combined with the vertical filter membrane filter wall structure, to filter, purify and concentrate silver nanowire mother liquor; it can be applied to filter and purify one-dimensional micron and nanowires, two-dimensional micron and nanowires Sheets and three-dimensional micro and nanoparticles, etc. Background technique [0002] Over the past few decades, transparent electrodes have gained increasing attention as key components in LCD TVs, e-readers, smartphones, smart glasses, touch screens, organic light-emitting diodes (OLEDs), and organic photovoltaic devices (OPVs). So far, indium tin oxide (ITO) occupies a major share of the entire transparent electrode material market due to its excellent electrical conductivity and optical properties. However, ITO also has some inherent problems that cannot be avoided...

AI Technical Summary

Problems solved by technology

[0006] A stirring-induced centrifugal force-vertical filtration purification device, which is specifically used for the purification, filtration, and concentration of silver nanowire mother liquor, removes a large amount of organic and inorganic impurities in the mother liquor, and solves the problems of high production cost, high impurity content, and unstable quality of silver nanowires problem

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