Preparation method of ptc graphene-based conductive ink and ptc graphene-based conductive ink

Abstract

The invention provides a preparation method of PTC graphene-based conductive ink, which comprises the following steps in parts by weight: preparing titanium quantum dot-doped graphene dispersion liquid, preparing titanium quantum dot-doped graphene-carbon black slurry, preparing PTC mixed liquid, preparation of titanium quantum dot doped graphene-based mixed liquid and preparation of PTC graphene-based conductive ink. The polylactic acid-polyethylene glycol block copolymer modified by methoxypolyethylene glycol acrylate has a suitable glass transition temperature range and adhesion ability, and on the one hand realizes the polylactic acid-polyethylene glycol block The copolymer undergoes glass transition in a suitable temperature range, and on the other hand, it also helps to improve the overall anti-peeling effect of the ink. The present invention also provides a PTC graphene-based conductive ink prepared by the aforementioned PTC graphene-based conductive ink preparation method.

Description

Preparation method of PTC graphene-based conductive ink and PTC graphene-based conductive ink technical field The present invention relates to ink printing technical field, be specifically related to a kind of preparation method of PTC graphene-based conductive ink, The present invention also relates to the PTC graphene-based conductive ink prepared by the above-mentioned preparation method of the PTC graphene-based conductive ink. Background technique Graphene is a kind of carbon atom through sp 2 Hybrid orbitals form a hexagonal honeycomb structure with only one layer Two-dimensional nanomaterials with the thickness of carbon atoms. The unique structure of graphene endows it with many excellent properties, such as high theoretical specific surface area (2630m 2 / g), ultra-high electron mobility (~200000cm 2 / v.s), high thermal conductivity (5300W / m.K), high Young's modulus (1.0TPa) and high transmittance (~97.7%), etc. With its structural and performa...

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Problems solved by technology

However, the graphene heating coating prepared by these methods has a fatal flaw: when the local temperature of the graphene heating coating is too high, such as short circuit and other current overload conditions, local excessive temperature caused by uneven heat dissipation, etc., will destroy the graphene heating. coating, and even cause a fire

However, due to the random mixing and adhesion of conductive fillers and PTC functional materials in this PTC graphene heating ink, the square resistance of the graphene heating ink is large, the resistance value is difficult to recover after the glass transition of the resin, and the conductive filler is easy to precipitate after long-term use. Defects such as decreased adhesion between ink and substrate

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