Conductive graphite emulsion and preparation method thereof

Abstract

The invention discloses conductive graphite cream and a preparation method thereof, which solve the technical problem of improving dispersibility of graphite cream. The conductive graphite cream comprises materials including, in weight percent, 10-30% of conductive graphite, 1-30% of matrix resin, 0.1-5% of conductive polymer auxiliaries, 0.1-5% of dispersing auxiliaries and the balance solvents. The preparation method includes the steps: adding the conductive polymer auxiliaries into the solvents to obtain solution 1; adding the matrix resin into the solvents to obtain solution 2; adding the conductive graphite into the solution 2; adding the dispersing auxiliaries into the solution 2 for ball-milling; adding the solution 1 into solution 3; and performing ultrasonic oscillation, high-pressure dispersion and stirring to obtain the conductive graphite cream. Compared with the prior art, the conductive graphite cream and the preparation method have the advantages that nano carbon materials are added, ball-milling, ultrasonic oscillation and high-pressure dispersion are performed for assisting so that the conductive graphite cream is uniformly dispersed, and the preparation method is simple and low-cost.

Description

technical field [0001] The invention relates to a conductive coating for spraying and a preparation method thereof, in particular to a graphite emulsion for spraying and a preparation method thereof. technical background [0002] Conductive graphite emulsion, also known as colloidal graphite, is a kind of solid-liquid phase system material with ultrafine flake graphite as solid dispersed phase and water, oil, organic solvent or resin solution as medium. In addition to excellent electrical conductivity and high thermal efficiency, it also has the advantages of low cost, light weight, high structure, and non-toxic and harmless. It is a functional coating with a large amount at present. It is widely used in batteries, electronic circuits, electromagnetic wave shielding, heating, Antistatic, high temperature and corrosion resistance, marine antifouling, electroplating industry, has a wide range of application prospects. And because the conductive filler has the advantages of wi...

AI Technical Summary

Problems solved by technology

When the conductive filler particles reach the nanoscale, the specific surface area is large, and flocculation is easy to occur during the coating preparation process, and the addition of some additives will significantly affect the dispersibility and wettability of the filler in the matrix

Moreover, when mixed conductive fillers are added, due to the different specific surface areas of the particles, coating film defects such as pinholes and cracks are prone to occur during the coating process. The graphite emulsion added with nanomaterials prepared by the traditional process is prone to flocculation due to poor dispersion. Subsidence is often serious, increasing the difficulty of use

[0005] Chinese Patent Publication No. CN1390894A discloses a conductive paint for the inner wall of the battery case and its preparation method. It adopts a simple method of stirring and adding a dispersing aid to obtain the conductive paint for spraying the inner wall of the battery case, but the ethylene raw material used is dissolved Poor performance, need to use mixed solvents, some organic solvents cause certain pollution to production and the environment, and the preparation time is long, the prepared graphite emulsion cannot be diluted with cheap and environmentally friendly solvents such as alcohol

To sum up, the existing technology does not solve the problem that the graphite emulsion prepared by adding nano-carbon materials is difficult to disperse, easy to settle, and reduce the difficulty and cost of use.