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Graphite nanosheet conductive ink as well as preparation method and application thereof

A technology of graphite nanosheets and conductive inks, applied in the directions of ink, graphite, application, etc., can solve the problems of low viscosity and concentration of conductive inks, reduced lateral size or length, and reduced lateral size or length, etc. Concentration, conductivity and stable effect

Inactive Publication Date: 2020-04-14
HUARUIMOSHI DANYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current related reports, ultrasound is mostly used to disperse conductive carbon nanomaterials, and then the resulting dispersion is mixed with a binder prepared from a binder, solvent, and auxiliary agent, and then ground to prepare a conductive ink. The preparation process is complicated.
Although ultrasound-induced cavitation can well disperse carbon nanomaterials, it can also fragment them, reduce their lateral dimensions or length, or destroy their crystal structure, adversely affecting electrical conductivity
Moreover, ultrasound can only disperse systems with low viscosity and low concentration, resulting in very low viscosity and concentration of the prepared conductive ink
Commonly used grinding methods include ball milling, sand milling and three-roll milling. When ball milling and sand milling work, the grinding medium will strongly impact the dispersed material, reducing the transverse size or length of carbon nanomaterials; while the three-roller mill operates at a faster speed. Low, large roller spacing, limited shear force, can not produce a good dispersion effect on carbon nanomaterials

Method used

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  • Graphite nanosheet conductive ink as well as preparation method and application thereof
  • Graphite nanosheet conductive ink as well as preparation method and application thereof
  • Graphite nanosheet conductive ink as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Preparation of graphite nanosheet conductive ink

[0091] (1) According to the material content in Table 3, dissolve the linking agent in the solvent in the barrel of a high-speed mixer at a speed of 400 rpm, then add the auxiliary agent and continue stirring until uniform;

[0092] (2) Place the product obtained in step (1) in a colloid mill at a speed of 10000rpm, then simultaneously and slowly add the graphite nanosheets and the conductive carbon black into the colloidal abrasive hopper, and grind for 4h to obtain the obtained Graphite nanosheet conductive ink.

[0093] Graphite nanosheets in Table 3 are the same as Comparative Example 1; polyurethane resins in Table 3 are the same as Comparative Example 1.

[0094] table 3

[0095]

[0096] Preparation of RFID linen label

[0097] (1) Print the graphite nanosheet conductive ink prepared above onto a polyethylene terephthalate (PET) substrate 1 by a screen printing process;

[0098] (2) Place the product obtai...

Embodiment 2

[0103] Preparation of graphite nanosheet conductive ink

[0104] (1) According to the material content in Table 4, dissolve the linking agent in the solvent in the barrel of a high-speed mixer at a speed of 400 rpm, then add the auxiliary agent and continue stirring until uniform;

[0105] (2) Place the product obtained in step (1) in a colloid mill at a speed of 12000rpm, then simultaneously and slowly add the graphite nanosheets and the conductive carbon black into the colloidal abrasive hopper, and grind for 6h to obtain the obtained Graphite nanosheet conductive ink.

[0106] Graphite nanosheets in Table 4 are prepared by jet cavitation method, using jet cavitation equipment disclosed in Chinese patent CN201110190763.3: graphite powder and mixed solvent (prepared by ethanol and water, wherein the volume fraction of ethanol is 50%) are prepared into a graphite dispersion with a concentration of 10 mg / ml. The graphite dispersion was treated with jet cavitation equipment at...

Embodiment 3

[0117] Preparation of graphite nanosheet conductive ink

[0118] (1) According to the material content in Table 5, dissolve the linking agent in the solvent in the high-speed mixer barrel at a speed of 400 rpm, then add the auxiliary agent and continue stirring until uniform;

[0119] (2) Place the product obtained in step (1) in a colloid mill at a speed of 8000rpm, then simultaneously and slowly add the graphite nanosheets and the conductive carbon black into the colloidal abrasive hopper, and grind for 4h to obtain the obtained Graphite nanosheet conductive ink.

[0120] Graphite nanosheets in Table 5 were prepared by a high-speed shearing method: graphite powder and a mixed solvent (prepared from ethanol and water, wherein the volume fraction of ethanol was 50%) were prepared into a graphite dispersion with a concentration of 15 mg / ml. Put the graphite dispersion in a high-speed machine, process it at 8000 rpm for 6 hours, and then filter and dry the obtained dispersion t...

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Abstract

The invention discloses graphite nanosheet conductive ink as well as a preparation method and application thereof. The graphite nanosheet conductive ink comprises the following components in percentage by weight: 7%-30% of graphite nanosheets, 1%-20% of an auxiliary conductive carbon material, 10%-30% of a bonding agent, 40%-80% of a solvent and 0.1%-5% of an auxiliary agent. The method comprisesthe following steps: (1) uniformly mixing the bonding agent, the solvent and the auxiliary agent; and (2) grinding the mixture obtained in the step (1), the graphite nanosheet and the auxiliary conductive carbon material in a colloid mill to obtain the graphite nanosheet conductive ink. The graphite nanosheet conductive ink is good and stable in conductivity and can be used for preparing RFID linen labels, and the prepared RFID linen labels can meet the requirements of the linen industry for high temperature resistance, high humidity resistance, bending resistance and torsion resistance of RFID washing labels.

Description

technical field [0001] The present application relates to but not limited to the field of conductive inks, and particularly relates to but not limited to a graphite nanosheet conductive ink and its preparation method and application. Background technique [0002] RFID (Radio Frequency Identification) is a wireless communication technology that can realize non-contact two-way data communication, that is, it can use radio frequency to read and write data information recorded in the physical carrier, and can realize the identification of multiple targets at the same time and information transfer. Implanting ultra-high frequency RFID tags with waterproof, high temperature resistance, and long reading distance into the linen can realize rapid sorting of linen, automatic inventory, accurate recording of usage, etc., so as to satisfy the hotel's automation of linen management needs. After repeated use, washing, drying, and ironing, linen will be exposed to harsh environments such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/102C09D11/104H01Q1/38G06K19/077C01B32/21
CPCC09D11/52C09D11/102C09D11/104H01Q1/38G06K19/07749C01B32/21
Inventor 沈志刚刘立新
Owner HUARUIMOSHI DANYANG CO LTD
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