Graphene heating ink, preparation method and application thereof

Abstract

The invention discloses a graphene heating ink, a preparation method and application thereof. The graphene heating ink comprises the following raw materials by mass percent: 5-15% of carbon black, 10-25% of graphite, 0.1-5% of graphene powder, 0.1-8% of carbon nanotube powder, 25-40% of an adhesive, 1-5% of an assistant, and the balance a mixed solvent. Through combination of dotted carbon black,linear carbon nanotubes and planar graphene, a mutually cross-linked stable structure can be formed inside the ink, and the safety is high. Through improvement of the preparation process and the ink formula components, blistering does not occur easily in the stirring process, and the ink has good adhesion during printing, the electro-thermal conversion efficiency of the heating ink is remarkably improved, the far infrared normal emissivity of an electrothermal film is significantly enhanced, the service life of the electrothermal film is greatly increased, and the power change of 100,000h aging test is less than 2.6%. Also, the implementation process adopted by the invention is simple, efficient and practical.

Description

technical field [0001] The invention relates to the technical field of ink, in particular to a graphene heating ink and its preparation method and application. Background technique [0002] With the rapid development of the domestic economy and the vigorous promotion of the country's clean heating policy, there is an increasing demand for heating products with high conversion efficiency and safety and health. The emergence of graphene heating products just makes up for this market vacancy, and The most critical step in graphene heating products is the development and preparation of graphene heating paste. [0003] At present, there are many existing technologies related to graphene heating film, such as: [0004] The prior art with Chinese patent announcement number CN103338538B disclosed a graphene radiation heating film and its preparation method and application on July 19, 2013. Significant improvement, but this patent has not yet adopted the exothermic ink combining gr...

AI Technical Summary

Problems solved by technology

[0004] The prior art with Chinese patent announcement number CN103338538B disclosed a graphene radiation heating film and its preparation method and application on July 19, 2013. Significant improvement, but the patent has not yet used graphene and carbon nanotubes, as well as carbon black and graphite combined heat-generating ink, so the service life, far infrared normal emissivity is far below the existing requirements

[0005] The prior art with the Chinese patent announcement number CN103607795A disclosed a method for preparing a graphene heating film on June 3, 2015. The patent prepared a low-voltage, adjustable-size graphene heating film through a simple and easy-to-control method , the heating is very uniform in a relatively small area, but in a relatively large heating area or in the case of continuous energization for a long time, because the lateral stability of the ink is insufficient, it is easy to cause power attenuation and local temperature is too high phenomenon, likely to cause safety hazards

At present, due to the improper selection of raw materials and preparation processes, the inks on the market have affected the electrical and thermal conductivity of the heating inks, and in the actual use process, power attenuation, short life, low thermal efficiency, low infrared normal emissivity, etc. question