High-temperature-resistant super-black coating
By preparing a simple high-temperature resistant ultra-black coating, the problem of insufficient durability of existing coatings in high-temperature environments is solved, and a coating with good durability and low reflectivity at high temperatures is achieved, which is suitable for a variety of substrates.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2026-03-10
AI Technical Summary
Existing blackbody coatings lack durability in high-temperature environments and have complex preparation processes, making them difficult to meet the needs of high-temperature scenarios such as aerospace.
High-temperature resistant ultra-black coatings are prepared by using a combination of carbon materials, polymer substrates, and high-temperature resistant binders through a simple spraying process, including dispersion, mixing, and heat treatment steps.
The prepared coating exhibits good durability and low reflectivity at high temperatures, is suitable for various substrates, and meets the needs of different application scenarios.
Smart Images
Figure CN121628409A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a kind of preparation of high-temperature-resistant super black paint, belong to the technical field of coating preparation. BACKGROUND
[0002] Blackbody materials are widely used in various fields, such as astronomy, environmental protection, medical treatment, transportation, high-temperature furnace, and aerospace, etc. In recent years, scientists have been committed to the research and development of new blackbody materials, such as super black materials, nano blackbody materials, electronic blackbody materials, and multi-stage foam sound-absorbing blackbody materials, etc. The research of blackbody materials mainly involves the fields of optics, thermal energy utilization, and material science, etc. In these fields, the characteristics and applications of blackbody materials have attracted widespread attention: in the context of optics, blackbody materials are materials that can absorb all incident light, with almost no reflection and transmission of light, so they are often used as ideal radiation sources in optics to calibrate the accuracy of spectroscopic instruments and determine the color of objects. In thermal energy utilization, the incident light energy is completely converted into heat energy on the surface of blackbody materials, so there is great potential in the aspect of photo-thermal utilization. In the aspect of material science, the research of blackbody materials also involves the synthesis and preparation methods of materials, microstructure, and performance optimization, etc. By changing the composition and structure of materials, their light absorption performance and thermal conductivity properties can be adjusted to meet the needs of different application scenarios. At the same time, the research of blackbody materials by the state has begun to expand to various fields, such as industrial production, seawater desalination, biological medicine, and transportation, etc. Due to the photo-thermal effect, a large amount of heat is generated during the work of blackbody materials, which causes the surface of the coating to heat up rapidly. In some specific working scenarios, such as aerospace and high-temperature blackbody applications, the blackbody coating is also in a high-temperature state for a long time. However, most of the current blackbody coatings use organic binders, which decompose and fail at high temperatures, resulting in insufficient durability of blackbody coatings in high-temperature environments above 300°C. Secondly, the preparation process of most existing blackbody materials is complex, and the surface microstructure needs to be precisely controlled to ensure high light absorption and low reflectivity of the coating.
[0003] Therefore, the present application relates to a simple high-temperature-resistant super black paint formula, which can be directly sprayed, brushed, or rolled on the surface of any shape and material substrate, and can meet the needs of various application scenarios. SUMMARY
[0004] To solve the above problems, the present application provides the following high-temperature-resistant super black paint formula, which is composed of fillers, polymer substrates, and high-temperature-resistant binders. Its characteristics lie in the following steps: (1) Add carbon material fillers to deionized water, then add a dispersing agent and mix, and ultrasonically treat to obtain a dispersion liquid of carbon materials; (2) under stirring, adding polymer base into the dispersion solution obtained in step (1) to obtain a mixed solution; (3) under stirring, adding high-temperature binder into the mixed solution obtained in step (2), and after uniform mixing and stirring, obtaining the high-temperature-resistant super-black coating.
[0005] Further, in step (1), the carbon material is one or more of carbon black, graphite, carbon nanotube, and carbon sphere; Further, in step (1), the dispersant is any one of polyglycerin fatty acid ester, polyoxyethylene sorbitan monostearate, polyethylene glycol distearate, polyethylene glycol dilaurate, hydroxypropyl methyl cellulose, and dodecyl phenol polyoxyethylene ether; Further, in step (2), the polymer base is a hydroxyl resin, wherein 5-10 wt.% of silane coupling agent is added; Further, in step (3), the high-temperature-resistant binder is aluminum dihydrogen phosphate; Further, in steps (2) and (3), the stirring speed of the mixed solution is 2000-4000 r / min, and the stirring time is 10-30 min; Further, in the high-temperature-resistant black coating material, the content of the carbon material is 5-10 phr, the content of the dispersant is 0.5-5 phr, the content of the polymer base is 77.5-93.5 phr, and the content of the high-temperature-resistant binder is 1-7.5 phr; Further, the coating solution obtained in step (3) is uniformly sprayed on a substrate, and after heat treatment in a muffle furnace, a high-temperature-resistant super-black coating is obtained.
[0006] The coating has the characteristics of good coating durability, good high-temperature resistance, and low reflectivity. BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 is the light absorption rate of the coating prepared in Example 1 of the present application, Figure 2 is an adhesion test diagram of the coating prepared in Example 1 of the present application. DETAILED DESCRIPTION
[0008] The specific embodiments of the present application are described in detail below.
[0009] Step one: taking 100-500 ml of deionized water, adding 5-10 g of carbon material, and adding 0.5-5 g of dispersant, mixing, placing the beaker on a magnetic stirrer, and stirring for 15 min to obtain a mixed solution; Step two: the mixed solution obtained in step one is stirred, 77.5-93.5 g of a polyol resin and 5-10 g of a silane coupling agent are added to the solution, and the mixture is stirred rapidly for 30 min; Step three: the mixed solution obtained in step two is stirred, 1-7.5 g of an aluminum dihydrogen phosphate binder is added to the solution, and the mixture is stirred rapidly for 20 min; Step four: the obtained coating is uniformly sprayed on a stainless steel substrate, and the coating is heat treated at 200-400°C for 20 min to obtain a high-temperature-resistant super-black coating.
[0010] The super-black coating of the embodiment has a light absorption rate of 99.9% or more, and the coating does not fall off in a 600°C environment.
[0011] The technical solutions of the present application are further described below in conjunction with the embodiments. Specific embodiment 1: Take 100 ml of deionized water, add 5 g of carbon black, and add 1.5 g of a dispersant, sodium lauryl succinate monoester sulfonate, mix, place the beaker on a magnetic stirrer, and stir for 15 min to obtain a mixed solution. Under stirring conditions, 85 g of an acrylate and 5 g of a silane coupling agent are added to the above mixed solution, and the mixture is stirred rapidly for 30 min. Under stirring conditions, 2.5 g of an aluminum dihydrogen phosphate binder is continuously added to the solution, and the mixture is stirred rapidly for 20 min. The obtained coating is uniformly sprayed on a stainless steel substrate, pre-sintered at 200°C in a muffle furnace for 20 min, and high-temperature sintered at 600°C for 60 min to obtain a high-temperature-resistant super-black coating. Specific embodiment 2: Take 100 ml of deionized water, add 1 g of carbon fiber and 4 g of carbon black, and add 1.5 g of a dispersant, sodium lauryl succinate monoester sulfonate, mix, place the beaker on a magnetic stirrer, and stir for 15 min to obtain a mixed solution. Under stirring conditions, 83.5 g of an acrylate and 5 g of a silane coupling agent are added to the solution, and the mixture is stirred rapidly for 30 min. Under stirring conditions, 5 g of an aluminum dihydrogen phosphate binder is continuously added to the solution, and the mixture is stirred rapidly for 20 min. The obtained coating is uniformly sprayed on a porous ceramic substrate, pre-sintered at 200°C in a muffle furnace for 20 min, and high-temperature sintered at 700°C for 60 min to obtain a high-temperature-resistant super-black coating. Specific embodiment 3: Take off 100ml of deionized water, add 5g of carbon micron balls, add 1.5g of dispersant sodium lauryl succinate monoxide, mix, put the beaker on the magnetic stirrer for 15min stirring, get the mixed solution; under stirring conditions, 80g of acrylate and 5g of silane coupling agent are added to the solution, and the solution is quickly mixed and stirred for 30min; under stirring conditions, 7.5g of adhesive aluminum dihydrogen phosphate is added to the solution, and the solution is quickly mixed and stirred for 20min. The obtained coating is uniformly sprayed on the quartz substrate, pre-sintered at 200℃ for 20min in a muffle furnace, and then high-temperature sintered at 600℃ for 60min to obtain a high-temperature-resistant super-black coating.
Claims
1. A process for the preparation of a high temperature resistant super black coating, characterized in that, The method comprises the following steps: (1) adding carbon material filler into deionized water, then adding dispersant for mixing, and ultrasonic treatment to obtain a dispersion liquid of carbon material; (2) under stirring, adding a polymer base into the dispersion liquid obtained in step (1) to obtain a mixed solution; (3) under stirring, adding a high-temperature binder into the mixed solution obtained in step (2), and after mixing and stirring, a high-temperature-resistant super-black coating is obtained.
2. The production method according to claim 1, characterized by, The carbon material is one or more of carbon black, graphite, carbon nanotube and carbon sphere; the dispersant is any one of polyglycerin fatty acid ester, polyoxyethylene sorbitan monostearate, polyethylene glycol distearate, polyethylene glycol dilaurate, hydroxypropyl methyl cellulose and dodecyl phenol polyoxyethylene ether; the polymer base is a hydroxyl resin, wherein 5-10 wt.% of silane coupling agent is added; The high-temperature-resistant binder is aluminum dihydrogen phosphate; in the high-temperature-resistant black body coating material, the content of the carbon material is 5-10 phr, the content of the dispersant is 0.5-5 phr, the content of the polymer base is 77.5-93.5 phr, and the content of the high-temperature-resistant binder is 1-7.5 phr.