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Inorganic modified high-temperature-resistant high-emissivity graphene coating and preparation method thereof

A high-emissivity, inorganic modification technology, applied in the direction of alkali metal silicate coatings, coatings, etc., can solve the problems of low heat transfer efficiency, reduce the curing time of inorganic adhesives, low emissivity, etc., and achieve extended base The effect of material life, adhesion improvement, and high bonding strength

Inactive Publication Date: 2019-06-14
SHENZHEN GUOCHUANG JIAWEI GRAPHENE TECH CO LTD +1
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  • Abstract
  • Description
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Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an inorganic modified high-temperature resistant high-emissivity graphene coating and its preparation method. By compounding various inorganic adhesives, the temperature resistance can be increased to 1200°C ; add silicone resin emulsion and inorganic adhesive for hybridization, which can reduce the curing time of the inorganic adhesive, reduce the volume shrinkage during curing, and enhance the toughness of the inorganic adhesive; then introduce graphene, use its high emissivity And high thermal conductivity, supplemented by a variety of functional fillers, and high-efficiency dispersion and grinding, and finally made into a coating film on the surface of the equipment, aiming to solve the problems of low emissivity and low heat exchange efficiency on the surface of domestic high-temperature heat exchange equipment

Method used

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  • Inorganic modified high-temperature-resistant high-emissivity graphene coating and preparation method thereof

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preparation example Construction

[0046] In the second technical scheme, the present invention proposes a kind of preparation method of inorganic modification high temperature resistant high emissivity graphene coating, comprises the following steps successively:

[0047] Step 1. Mix the graphene powder, surface treatment agent and deionized water, and use an ultrasonic emulsification disperser to ultrasonically emulsify for more than 30 minutes to prepare a graphene dispersion;

[0048] Step 2. Slowly add deionized water, sodium silicate, potassium silicate, silica sol, and zirconium sol in order and stir evenly at a low speed to prepare an inorganic high-temperature adhesive;

[0049] Step 3. Add deionized water and thickener to the dispersing tank and stir evenly at a low speed. After adding all of them, continue to stir slowly for at least 30 minutes to fully expand the thickener;

[0050] Step 4. Add the graphene dispersion liquid, silicone resin emulsion, functional filler, dispersant, and defoamer into ...

Embodiment 1

[0053] A modified inorganic high-temperature-resistant, high-emissivity graphene coating is prepared by the following method:

[0054] (1) Preliminarily mix 0.1 parts of graphene powder, 0.2 parts of KH560, and 7.7 parts of deionized water, and use an ultrasonic emulsification disperser to ultrasonically emulsify for 1 hour to obtain a graphene dispersion;

[0055] (2) Take 10 parts of deionized water, 20 parts of sodium silicate with a modulus of 4.7, 2 parts of potassium silicate with a modulus of 4.7 and 15 parts of silica sol with a solid content of 25% and slowly add them to the dispersion tank in order and stir evenly at high speed to obtain an inorganic high-temperature adhesive agent;

[0056] (3) Add 15 parts of deionized water and 2 parts of rectorite to the dispersion tank and stir evenly at a low speed. After adding all of them, continue stirring for at least 30 minutes to fully expand the rectorite;

[0057] ⑷With the graphene dispersion obtained in step ⑴, 6.5 p...

Embodiment 2

[0061] A modified inorganic high-temperature-resistant, high-emissivity coating is prepared by the following method:

[0062] (1) Preliminarily mix 0.5 parts of graphene powder, 1.5 parts of CTAB, and 8 parts of deionized water, and use an ultrasonic emulsification disperser to ultrasonically emulsify for 1 hour to obtain a graphene dispersion;

[0063] (2) Take 10 parts of deionized water, 5 parts of sodium silicate with a modulus of 4.7, 22 parts of potassium silicate with a modulus of 2.7 and 17 parts of zirconium sol with a solid content of 20% and slowly add them to the dispersion tank in order and stir evenly at high speed to obtain an inorganic high-temperature adhesive agent;

[0064] (3) Add 10 parts of deionized water and 1 part of bentonite to the dispersion tank and stir evenly at a low speed. After adding all of them, continue stirring for at least 30 minutes to fully expand the bentonite;

[0065] ⑷With the graphene dispersion obtained in step ⑴, 3.4 parts of Wa...

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Abstract

The invention provides an inorganic modified high-temperature-resistant high-emissivity graphene coating. The inorganic modified high-temperature-resistant high-emissivity graphene coating is preparedfrom the following raw materials in parts by weight: 35-55 parts of an inorganic high-temperature adhesive; 3-10 parts by weight of an organic silicon resin emulsion; 1-10 parts by weight of a graphene dispersion liquid; 20-30 parts by weight of a functional filler; 1-4 parts by weight of an auxiliary agent; and 10-20 parts by weight of deionized water. According to the invention, the organic silicon resin emulsion and the inorganic high-temperature adhesive are subjected to hybridization reaction, thus normal-temperature curing of the inorganic adhesive can be accelerated, and the defects oflarge volume shrinkage in the curing process of the inorganic adhesive and easy generation of cracks and micro pores due to the rigidity of a formed film are effectively solved; the high radiation and high heat conductivity coefficient of graphene are utilized, and multiple functional fillers are supplemented, thus the emissivity of the prepared inorganic modified high-temperature-resistant high-emissivity graphene coating is 0.98 or above, and meanwhile the temperature resistance can reach 1200 DEG C. The invention also provides a preparation method of the inorganic modified high-temperature-resistant high-emissivity graphene coating.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an inorganic modified high-temperature resistant high-emissivity graphene coating and a preparation method thereof. Background technique [0002] With the increasing shortage of fossil energy and the increasingly serious environmental pollution, the research on energy-saving materials has been widely valued by researchers at home and abroad. High-emissivity coating is a new type of coating material with enhanced radiation heat transfer capability. Its application in the field of heat exchange can improve the heat exchange efficiency of heat exchangers, thereby achieving the purpose of energy saving. In addition, the high-emissivity coating can also slow down the oxidation rate of the metal substrate and improve the service life of the metal parts. With the development of economy and society, the demand for energy continues to increase, but in the process of increasing the heat ...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D1/00C09D7/61C09D7/62C09D7/63C09D7/65
Inventor 袁想平丁显波王东卫刘克
Owner SHENZHEN GUOCHUANG JIAWEI GRAPHENE TECH CO LTD
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