Hollow microspheres for high temperature resistant thermal insulation coating and preparation method and application thereof

A technology of hollow microbeads, thermal insulation, applied in chemical instruments and methods, reflective/signal coatings, fibrous fillers, etc., can solve the problems that the titanium dioxide coating layer is easy to fall off and cannot achieve synergistic effect, and achieve enhanced combination Strength, enhanced heat insulation rate, and the effect of avoiding falling off

Inactive Publication Date: 2019-10-18
江苏未名之光纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the surface of the hollow microspheres is flat and smooth, the titanium dioxide coating layer of the hydrolyzed titanium dioxide/hollow

Method used

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  • Hollow microspheres for high temperature resistant thermal insulation coating and preparation method and application thereof
  • Hollow microspheres for high temperature resistant thermal insulation coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] (1) Cleaning: The hollow microbeads with a particle size of 50um and a wall thickness of 10um are washed with acetone and deionized for 3 times, until the surface oil is removed;

[0022] (2) Acid immersion: Add the cleaned hollow microspheres to a dilute solution of 1% hydrofluoric acid and soak for 0.5h to make the surface of the hollow microspheres slightly etched;

[0023] (3) Detonation: Add the acid-leached hollow microbeads and sodium azide with a mass ratio of 10:2 into deionized water, stir and mix, add liquid nitrogen, and freeze-dry to make sodium azide Evenly adhere to the brown wrinkles produced by acid leaching on the surface of the hollow microbeads, then place them in a closed reactor to initiate an explosive reaction, then wash with deionized water and dry;

[0024] (4) Coating: first mix and stir butyl titanate, absolute ethanol, acetylacetone and distilled water, and the molar ratio of butyl titanate, absolute ethanol, acetylacetone and di...

Example Embodiment

[0025] Example 2:

[0026] (1) Cleaning: The hollow microbeads with a particle size of 200um and a wall thickness of 30um are washed three times with acetone and deionized sequentially until the surface oil is removed;

[0027] (2) Acid immersion: Add the cleaned hollow microspheres to a dilute solution with a mass fraction of 3% hydrofluoric acid for 1 hour to make the surface of the hollow microspheres slightly etched;

[0028] (3) Detonation: Add the acid-leached hollow microbeads and sodium azide with a mass ratio of 5:2 into deionized water, stir and mix, add liquid nitrogen, and freeze-dry to make the sodium azide Evenly adhere to the brown wrinkles produced by acid leaching on the surface of the hollow microbeads, then place them in a closed reactor to initiate an explosive reaction, then wash with deionized water and dry;

[0029] (4) Coating: first mix and stir butyl titanate, absolute ethanol, acetylacetone and distilled water, and the molar ratio of butyl titanate, absolute...

Example Embodiment

[0030] Example 3:

[0031] (1) Cleaning: The hollow microbeads with a particle size of 500um and a wall thickness of 50um are washed with acetone and deionized for 3 times, until the surface oil is removed;

[0032] (2) Acid immersion: Add the cleaned hollow microspheres to a dilute solution with a mass fraction of 5% hydrofluoric acid for 2h to etch the surface of the hollow microspheres slightly;

[0033] (3) Detonation: Add the acid-leached hollow microbeads and sodium azide with a mass ratio of 5:3 to deionized water, stir and mix, add liquid nitrogen, and freeze-dry to make the sodium azide Evenly adhere to the brown wrinkles produced by acid leaching on the surface of the hollow microbeads, then place them in a closed reactor to initiate an explosive reaction, and then wash and dry with deionized water;

[0034] (4) Coating: first mix and stir butyl titanate, absolute ethanol, acetylacetone and distilled water, and the molar ratio of butyl titanate, absolute ethanol, acetylaceto...

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Abstract

The invention relates to the field of composite materials, and particularly provides novel composite hollow microspheres for high temperature resistant thermal insulation coating.The hollow microspheres are subjected to through acid etching and detonation hole making, a foundation is formed when titanium dioxide sol coats the hollow microspheres to improvedbonding force, the coated titanium dioxide sol is prevented from falling off during calcination, so that a titanium dioxide layer is evenly distributed on the surface of the hollow microspheres, and excellent heat reflection performance of the titanium dioxide and the ultra-low thermal conductivity of the hollow microspheres are fully utilized to realize good thermal insulation of the coating. The novel composite hollow microspheres forhigh temperature resistant thermal insulation coating is simple in operation, quick in reaction, high in production efficiency, and suitable for mass production, and the actual needs can be met.

Description

technical field [0001] The invention belongs to the technical field of coatings, and mainly relates to a preparation method and application of hollow microspheres for high-temperature-resistant heat-insulating coatings. Background technique [0002] In the prior art, traditional thermal insulation materials such as rock wool felt, inorganic thermal insulation mortar, polystyrene foam board, foamed polyurethane, etc. are widely used, but the use of these traditional thermal insulation materials must reach a certain thickness It has good thermal insulation performance, but it is time-consuming and labor-intensive in construction. The construction quality determines its poor waterproof performance. For outdoors, there is also sunlight exposure that is prone to cracking and water seepage of the insulation layer, which directly affects the anti-corrosion performance of the metal surface. However, the use of organic polymer foam material as the insulation layer has poor flame re...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/06C09C3/04C09D5/33
CPCC09C1/00C09C3/006C09C3/04C09C3/063C09D5/004
Inventor 不公告发明人
Owner 江苏未名之光纳米科技有限公司
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