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

A graphene-based, conductive ink technology, applied in the field of ink printing, can solve the problems of large square resistance of graphene heating ink, difficult recovery of resistance value, easy precipitation of conductive fillers, etc.

Active Publication Date: 2022-08-05
FOSHAN SHUNDE SANBEI ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Preparation of graphene oxide acetone dispersion: Provide 500 mg of graphite powder, and use the modified Hummers method to prepare graphene oxide (Graphene Oxide, GO). In order to further obtain few-layer graphene oxide, the graphene oxide was placed in an ice-water bath, ultrasonicated with an ultrasonic disperser for 10 minutes at a power of 250 W, repeated once, centrifuged the supernatant, and resuspended in acetone to obtain a thickness ranging from 12 to 12 A graphene oxide acetone dispersion with 20 layers and a lateral dimension of 700-1000 nm. Centrifugal concentration as required to adjust the concentration of graphene oxide acetone dispersion to 150 mg / ml.

[0042] Preparation of palladium quantum dot-doped graphene dispersion: take 500ml of the graphene oxide acetone dispersion prepared above and add 0.05g of phosphomolybdic acid to it, stir at 600rpm for 10h, centrifuge at 15000rpm for 30min, and collect the first sediment at the bottom of the centrifuge t...

Embodiment 2

[0048] Preparation of graphene oxide acetone dispersion: Provide 500 mg of graphite powder, and use the modified Hummers method to prepare graphene oxide (Graphene Oxide, GO). The prepared graphene oxide was further transferred to a high-temperature carbonization furnace for high-temperature carbonization for 30 s, the high-temperature carbonization furnace was filled with nitrogen, and the temperature of the high-temperature carbonization furnace was 1200 °C. In order to further obtain few-layer graphene oxide, the graphene oxide after high temperature expansion was placed in an ice-water bath, ultrasonicated for 20 minutes under 250W power with an ultrasonic disperser, repeated once, and the supernatant was centrifuged and resuspended in acetone to prepare A graphene oxide acetone dispersion liquid with a thickness ranging from 8 to 15 layers and a lateral dimension of 700 to 1000 nm. Centrifugal concentration as required to adjust the concentration of graphene oxide acetone...

Embodiment 3

[0055] Prepare palladium quantum dot-doped graphene dispersion: take 500ml of the graphene oxide acetone dispersion prepared in Example 2 above and add 0.2g of silicotungstic acid to it, and the graphene oxide acetone dispersion is ultrasonicated in a water bath for 30min, and the water bath temperature is 25 °C. After ultrasonication, the graphene oxide acetone dispersion was stirred at 600 rpm for 10 h, centrifuged at 15,000 rpm for 30 min, and the first precipitate at the bottom of the centrifuge tube was collected and transferred to a drying oven at 60 °C for 120 min to obtain a dry first precipitate. The above-mentioned first precipitate was resuspended with 100 ml of acetone and added with 0.2 g of palladium acetylacetonate, stirred again at 600 rpm for 10 h, and centrifuged at 15,000 rpm for 30 min after mixing. Dried second precipitate. The second precipitate was put into the quartz tube of the tube furnace, and the diluted hydrogen gas was introduced for reduction. ...

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Abstract

The invention provides a preparation method of PTC graphene-based conductive ink, which comprises the following steps in parts by weight: preparing a palladium quantum dot-doped graphene dispersion liquid, preparing a palladium quantum dot-doped graphene-carbon black paste, preparing PTC mixed solution, preparation of palladium quantum dot-doped graphene-based mixed solution, and preparation of PTC graphene-based conductive ink. The PA10T modified by the styrene-acrylonitrile-maleic anhydride copolymer has a suitable glass transition temperature range and adhesion ability. On the one hand, the PTC graphene-based conductive ink can be PTC protection, on the other hand, 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 preparation method of the PTC graphene-based conductive ink.

Description

technical field [0001] The invention relates to the technical field of ink printing, in particular to a preparation method of a PTC graphene-based conductive ink, and the invention also relates to a PTC graphene-based conductive ink prepared by the above-mentioned preparation method of the PTC graphene-based conductive ink. Background technique [0002] Graphene is a carbon atom through sp 2 The hybrid orbitals form a two-dimensional nanomaterial with a hexagonal honeycomb lattice structure and only one layer of carbon atoms thick. 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 light transmittance (~97.7%), etc. With its structural and performance advantages, graphene has great application prospects in the fields of energy storage and conversion devices, nanoe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/52C09D11/102C09D11/106C09D11/03
CPCC09D11/52C09D11/102C09D11/106C09D11/03
Inventor 李明吴立刚曾垂彬李正博
Owner FOSHAN SHUNDE SANBEI ELECTRONICS CO LTD