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Preparation method of super-hydrophobic fire-resistant hexagonal boron nitride coating

A hexagonal boron nitride, super-hydrophobic technology, applied in the field of refractory coatings, can solve the problems of cracking, cracking, deterioration of the adhesion of refractory coatings, etc.

Inactive Publication Date: 2021-04-30
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its corrosion products deteriorate the adhesion of the refractory coating, thereby reducing the service life of the coating; in addition, corrosion causes cracking and cracking, which leads to thermal radiation intrusion into the protective object, which does not provide excellent protection

Method used

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Examples

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preparation example Construction

[0022] A preparation method of a superhydrophobic refractory hexagonal boron nitride coating:

[0023] Firstly, air plasma is used to clean the base material, the treatment temperature is 40-60°C, the power is 5KW, the time is 5 minutes, and the treated base is obtained. The base material refers to one of glass, metal, wood, and plastic, and its surface finish is Ra>0.5 μm. It can be used in actual working conditions such as water pumps and building timber.

[0024] Then, according to the mass fraction, mix 2.5~3% of binder, 3.5~5% of hexagonal boron nitride fluoride, 0.05~0.5% of barium stearate, 70~78% of deionized water, and 15~20% of acetone, After ultrasonic stirring for more than 3 hours, the spray slurry can be obtained. Among them: binder refers to mixing trisodium phosphate, aluminum hydroxide and deionized water at a mass fraction ratio of 1:1:5~5:3:20, heating the oil bath to 85 ℃ for reaction, and continuously stirring for 3 hours be made of. Fluorinated hexago...

Embodiment 1

[0026] Example 1 A method for preparing a superhydrophobic refractory hexagonal boron nitride coating:

[0027] (1) Plasma pretreatment: Plasma pretreatment is performed on the wood surface to make the surface have a certain degree of cleanliness and roughness, and to increase the adhesion between the substrate and the coating. Its pretreatment power is 5 KW, the time is 5 minutes, and the air source is air.

[0028] (2) Preparation of binder: Mix 20 g of trisodium phosphate and 20 g of aluminum hydroxide in 100 mL of aqueous solution and react at 75°C, stirring continuously for 3 hours.

[0029] (3) Preparation of fluorinated hexagonal boron nitride: gradually add 1.5 g of perfluorodecyltriethoxysilane into 50 mL of hexagonal boron nitride in acetone solution, in which the content of hexagonal boron nitride is 5 g, and continuously stir for 24 hours.

[0030] (4) Spraying slurry preparation: 3.5 g of binder, 5 g of hexagonal boron nitride fluoride, 0.2 g of dispersant, 100 g...

Embodiment 2

[0032] Example 2 A method for preparing a superhydrophobic refractory hexagonal boron nitride coating:

[0033] ⑴Plasma pretreatment: Plasma pretreatment is performed on the cast iron surface to make the surface have a certain degree of cleanliness and roughness, and to increase the adhesion between the substrate and the coating. Its pretreatment power is 5KW, the time is 5 minutes, and the air source is air.

[0034] (2) Preparation of binder: Mix 25 g of trisodium phosphate and 15 g of aluminum hydroxide in 100 mL of aqueous solution and react at 75°C, stirring continuously for 3 hours.

[0035] (3) Preparation of hexagonal boron nitride fluoride: gradually add 2 g of perfluorodecyltriethoxysilane into 50 mL of hexagonal boron nitride in acetone solution, in which the content of hexagonal boron nitride is 5 g, and stir continuously for 24 hours.

[0036] (4) Spraying slurry preparation: 4 g of binder, 5.5 g of hexagonal boron nitride fluoride, 0.5 g of dispersant, 100 g of ...

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Abstract

The invention relates to a preparation method of a super-hydrophobic fire-resistant hexagonal boron nitride coating. The preparation method comprises the steps that firstly, a base material is washed by using air plasma to obtain a treated base; secondly, a binder, hexagonal boron nitride fluoride, barium stearate, deionized water and acetone are mixed in percentage by mass and ultrasonically stirred for more than 3 hours to obtain spray slurry; and finally, the spray slurry is sprayed on the surface of the treated base, and the super-hydrophobic fire-resistant hexagonal boron nitride coating is obtained after natural drying in the atmospheric environment. The preparation method is simple in process and facilitates industrial application, and the coating can be prepared on surfaces of different substrates and has the advantages of good moisture resistance, high temperature resistance, good coating performance, strong adhesion, easy drying and the like.

Description

technical field [0001] The invention relates to the technical field of refractory coatings, in particular to a preparation method of a superhydrophobic refractory hexagonal boron nitride coating. Background technique [0002] Refractory coatings act as physical barriers that impede the combustion process during fire, pyrolysis, or flame spread. For the traditionally used halogen organic flame retardant materials, due to the enhancement of environmental protection awareness, more and more environmental protection laws restrict their application. Inorganic flame retardants have attracted more attention because of their non-toxic, halogen-free, low price, non-polluting safety and environmental protection. However, in order to achieve the ideal flame retardant effect, the addition of inorganic nanoparticles is usually between 40% and 60%, which will lead to the deterioration of the mechanical properties of the coating (impact strength and ductility), the coating and the protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/02B05D5/00B05D3/04C09D5/18C09D1/00
CPCB05D1/02B05D5/00B05D3/0406C09D5/18C09D1/00
Inventor 于元烈白常宁张俊彦高凯雄
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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