Method for preparing microchip graphene electrothermic ink, preparation method and application of electrothermic wall cloth

An electrothermal ink and graphene technology, applied in ink, applications, household appliances, etc., can solve the problems of affecting the efficiency of ink transfer to the substrate, the uneven thickness of the printed heating layer, and limiting the development of screen printing, etc., to achieve excellent long-term Diameter ratio, improved safety and service life, the effect of fewer layers

Inactive Publication Date: 2019-02-22
江苏天创新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after each unit pattern is printed, it needs to re-ink and print at intervals. There is insufficient production efficiency, which greatly limits the development of screen printing in the field of electric heating wall coverings. At the same time, the ink-return phenomenon of the printing blade after printing the pattern causes In order to prevent the uneven thickness of the printed heating layer, it is easy to cause the quality problem of uneven heating of the film layer
In order to solve the problem of low production efficiency caused by screen printing, engineers tried to use gravure printing to produce electric heating wall cloth. This method greatly improved production efficiency, but it can only be printed on the surface of flexible substrates (PET film). This also limits the choice of printing substrates
Gravure printing has a high selectivity for inks, while traditional inks are dull in color, poor in dispersibility and conductivity. In addition, their adhesion is poor, their water resistance is poor, and they are not suitable for the leveling requirements of the printing process. Therefore, traditional The ink must be printed at a specific viscosity, and the sticking back phenomenon of the ink during the transfer process affects the efficiency of ink transfer to the substrate, thereby affecting the thickness of the film layer, and also causing quality problems of uneven heating of the heating layer

Method used

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  • Method for preparing microchip graphene electrothermic ink, preparation method and application of electrothermic wall cloth
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  • Method for preparing microchip graphene electrothermic ink, preparation method and application of electrothermic wall cloth

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preparation example Construction

[0057] A preparation method of microsheet graphene electrothermal ink, comprising the steps of:

[0058] S1: Preparation of nano-silver particles and nano-silver wires:

[0059] a1: Using the chemical reduction method, in deionized water, the silver salt solution is reduced by a reducing agent to prepare nano-silver colloids, the pH value of the colloid is adjusted by a pH regulator, and a dispersant is added to obtain spherical silver particles of different particle sizes. Agents to obtain long-term storage of nano-silver particles; Among them, the volume ratio of deionized water, silver salt, pH regulator, reducing agent and stabilizer is 0.1-80: 0.1-20: 0.1-5: 0.1-20: 0.1-20; The salt is one or a mixture of silver nitrate and silver sulfate, preferably silver nitrate; the pH regulator is KOH, and the pH value is 7 to 10, preferably 10; the reducing agent is ascorbic acid, sodium citrate, glucose, A mixture of one or more of sodium borohydride or amino acids (including tyro...

Embodiment 1

[0076] One, the preparation method of a kind of microchip graphene electrothermal ink in the present embodiment, comprises the steps:

[0077] S1: Preparation of nano-silver particles and nano-silver wires:

[0078] a1: Add 10mL of tyrosine to 70mL of deionized water, heat the oil bath to 90°C, stir for half an hour, remove excess tyrosine in deionized water, add 10mL of silver nitrate (0.5mM) under stirring, and the color Turn into light yellow, add 1mL of KOH (1M) under stirring, continue to stir for 1 hour, the color of the solution turns from light yellow to gray black, stop stirring, after cooling down to room temperature, add 10mL of water-based polyurethane emulsion, stir at room temperature for half an hour, stand-by;

[0079] a2: Heat 30mL of ethylene glycol oil bath to 160°C, keep stirring at constant temperature for 1 hour, add 420μL of sodium sulfide nonahydrate (solvent is ethylene glycol, 3mM), after 5 minutes, add 7.5mL of polyethylene Pyrrolidone (k30, solven...

Embodiment 2

[0090] One, steps S1 and S2 in the preparation method of a kind of microflake graphene electrothermal ink in the present embodiment are all identical with S1 and S2 in embodiment 1;

[0091] The specific content of step S3 in the preparation method of a kind of microsheet graphene electrothermal ink in the present embodiment is:

[0092] Take 43 parts of water-based polyurethane emulsion (mass ratio of thermoplasticity: thermosetting = 1:2), 5 parts of polymer dispersant core chemical S19 and Tego 760W mixture (combining ratio 30:70), 0.5 part of defoamer and mix and stir. The rotation speed is 800rpm, and 40 parts of graphene filter cake (solid content 17%), 0.5 part of leveling agent BYK-349, 0.5 part of Tego 270 substrate wetting agent, 0.5 part of preservative KD3000, 5 parts of nano Silver particles, 5 parts of nano-silver wires, stirred for 0.5 hours to obtain graphene microflakes / nano-silver electrothermal ink, that is, the preparation of microflake graphene electrother...

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Abstract

The invention provides a method for preparing a microchip graphene electrothermic ink, a preparation method and an application of an electrothermic wall cloth. The method for preparing the microchip graphene electrothermic ink comprises the following steps: preparing a silver nano-wire; preparing few-layer microchip graphene filter cake; and preparing the microchip graphene electrothermic ink. Themicrochip graphene electrothermic ink has the advantages of uniform dispersibility, high conductivity and the like. The preparation method of an electrothermic wall cloth comprises the following steps: compounding the microchip graphene electrothermic ink with a diluting agent; pumping to an ink outlet nozzle of a rotary screen printing device through a pipeline, uniformly feeding to a rotary screen inner tube under the pressure of a pump, regulating the depth, angle and position of a rotary screen printing scraper to uniformly extrude and print the ink from a rotary screen to a base material; and roasting in an oven, printing a silver electrode and preparing an electrothermic wall cloth semi-finished product. The method is simple in process and easy to operate, can overcome the limitation of a traditional printing mode to a base material. The electrothermic wall cloth can be applied to electromagnetic shielding cloth of a machine room.

Description

technical field [0001] The invention relates to the technical field of electrothermal material preparation, in particular to a preparation method of micrographene electrothermal ink, a preparation method of electric heating wall cloth and the application of electric heating wall cloth. Background technique [0002] With the support of the national "coal-to-electricity" policy, the country has vigorously promoted the development and use of "coal-to-electricity" technology and products, encouraged residents to clean heating, gradually banned traditional small coal-fired boilers, and slowed down the occurrence of smog disasters. Promote energy conservation and emission reduction. The electric heating market is developing rapidly, and the quality requirements for electric heating products are getting higher and higher. [0003] After more than ten years of development, the heating method of electric floor heating has gradually been accepted and recognized by consumers. The con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/52C09D11/102C09D11/03B41M1/12B41M7/00
CPCB41M1/12B41M7/0027B41M7/009C09D11/03C09D11/102C09D11/52
Inventor 徐莉刘承志曹路张学军
Owner 江苏天创新材料科技有限公司
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