Waterborne conductive ink and preparation method thereof

Abstract

The invention relates to waterborne conductive ink which comprises the following components in percentage by weight: 1-40 percent of polymer emulsion or dispersion liquid, 0.1-0.7 percent of dispersant, 0.1-0.3 percent of wetting agent, 0.2-1.8 percent of defoaming agent, 30-70 percent of conductive material, 0.5-3 percent of film-forming addition agent and 5-60 percent of water. The waterborne conductive ink disclosed by the invention has the advantages of no toxicity or odor, safety, environment friendliness, convenience in use, resource economization, favorable film forming performance and printing performance of ink, strong adhesive force and good weather resistance; the defects of toxicity, harm, inflammability and explosiveness of solvent ink are overcome; and water replaces organic solvent, so that a volatile organic compound (VOC) is reduced, and the production cost is also reduced.

Description

[0001] technical field [0002] The invention relates to a low-cost conductive ink, in particular to a low-cost, low-VOC, solvent-free, lead-free, halogen-free, green and environmentally friendly water-based conductive ink and a preparation method thereof, belonging to the technical field of electronic chemicals. Background technique [0003] Conductive ink (mainly refers to mixed conductive composite ink) conducts current by means of conductive materials dispersed in the ink carrier. Solvent-based inks have been around for nearly a century. The solvents used in traditional solvent-based inks are volatile organic compounds (Volatile Organic Compounds, VOC for short), which account for a large proportion of air pollution sources. Moreover, the long-term use of solvent-based inks not only endangers the health of operators and users, but also causes a lot of environmental pollution, and often causes accidents such as poisoning and explosions, which has become one of the key saf...

AI Technical Summary

Problems solved by technology

However, the particle size of graphite is large, and due to the orientation of graphite, the resistivity in the direction parallel to the crystal layer is (2.5~5.0)×10-6 Ω·m, and the resistivity in the direction perpendicular to the layer is It is 3×10-3 Ω·m, and there is also obvious anisotropy in terms of electrical properties. The conductive ink made of conductive ink has poor electrical conductivity and cannot meet the needs of higher electrical conductivity requirements.