Nano micro-powder heating coating

Abstract

The invention belongs to a heat absorption heating material, provides a nano micro powder heating coating, and solves the problems that the existing heating material cannot be used for a long time and is difficult to achieve an expected effect. The coating is prepared by mixing the following components in parts by weight: 15 to 20 parts of waterborne polyurethane emulsion, 30 to 45 parts of conductive carbon black micro powder, 0.1 to 0.3 part of special conductive carbon black micro powder, 0.05 to 0.1 part of carrageenan, 0.4 to 0.6 part of carboxymethylcellulose, 1.3 to 1.7 parts of ethanolamine, 30 to 50 parts of purified water and 0.25 to 0.5 part of preservative oxytetracycline. The finally formed coating is black, and a black object can absorb visible light and does not reflect light. The conductive carbon black micro powder and the special conductive carbon black micro powder are uniformly mixed in the coating to absorb light energy, then the light energy is stored in the coating through the photoelectric coupling effect, and the energy is converted into heat energy to be released when the temperature is reduced, so that the temperature is kept. And the preservative is added, so that the coating is durable, and the phenomena of falling off and the like are avoided.

Description

Technical Field

[0001] This invention pertains to heat-absorbing and temperature-raising materials, specifically relating to a nano-micro powder temperature-raising coating. Background Technology

[0002] Utility model patent application number 201820745899.3 discloses a biomass pellet heating and antifreeze system for solar greenhouses, including a fuel feeder, a burner, and a heat exchange device, all of which are integrally formed. This invention features adjustable feeding, blowing, and induced draft equipment, enabling sufficient heat collection and diffusion under low energy consumption conditions. It achieves low-load combustion, large-area heat exchange, multi-point collection, and full-coverage circulation of hot air, ensuring that all heat emitted from the combustion, exchange, and circulation devices is collected into the circulation system and rapidly diffused throughout the greenhouse. This effectively improves heat utilization and reduces heat loss, pioneering the standardized and routine application of biomass pellet fuel in solar greenhouse heating and antifreeze measures. It achieves an organic combination of the ecological, environmental, and circular aspects of modern facility agriculture, placing it at a leading level in China.

[0003] Patent application number 202210544523.7 discloses a special energy-concentrating nano-slurry for greenhouses, solving the problem that existing greenhouses cannot effectively store and release solar radiation heat energy to increase greenhouse temperature. It is prepared from the following raw materials in parts by weight: 0.05-0.1 parts bentonite dispersant, 2-4 parts SBR styrene-butadiene latex film-forming agent, 1-2 parts water-soluble carbon black, 0.1-0.3 parts highly conductive carbon black, and 100 parts water. It has the function of heat absorption and energy storage. The addition of highly conductive carbon black micropowder to the slurry allows it to absorb light energy while also converting it into heat, extending the time for energy storage and heat release. The conductive carbon black is uniformly mixed into the coating to absorb light energy, and then the light energy is stored in the coating and walls through photoelectric coupling. When the temperature inside the greenhouse decreases, the energy is converted back into heat energy and released, thereby increasing the greenhouse temperature. This increases greenhouse yield, saves energy and reduces consumption, and is safe and reliable. However, the material described in the patent is prone to deterioration and detachment, and it begins to detach after only 2 years of use, making it unusable for long periods. Summary of the Invention

[0004] This invention provides a nano-micro powder heating coating that solves the problems of existing heating materials being prone to falling off, not being able to be used for a long time, and failing to achieve the expected results.

[0005] This invention is achieved by the following technical solution: a nano-micro powder heating coating, prepared from the following raw materials in parts by weight: 15-20 parts of waterborne polyurethane emulsion, 30-45 parts of conductive carbon black micro powder, 0.1-0.3 parts of highly conductive carbon black micro powder, 0.05-0.1 parts of carrageenan, 0.4-0.6 parts of carboxymethyl cellulose, 1.3-1.7 parts of ethanolamine, 30-50 parts of purified water, and 0.25-0.5 parts of preservative; wherein: the preservative is oxytetracycline.

[0006] Furthermore, it is prepared from the following raw materials in parts by weight: 18 parts of waterborne polyurethane emulsion, 40 parts of conductive carbon black micro powder, 0.2 parts of highly conductive carbon black micro powder, 0.07 parts of carrageenan, 0.5 parts of carboxymethyl cellulose, 1.5 parts of ethanolamine, 40 parts of purified water, and 0.3 parts of preservative; wherein: the preservative is oxytetracycline.

[0007] The particle size of both the conductive carbon black micro powder and the extra-conductive carbon black micro powder is 1000 mesh.

[0008] The method for preparing the nano-micro powder heating coating is as follows: water-based polyurethane emulsion, conductive carbon black micro powder, highly conductive carbon black micro powder, carboxymethyl cellulose, ethanolamine, and preservative are mixed evenly with pure water at 40-45℃, and then carrageenan is added and mixed evenly.

[0009] The application method of the aforementioned nano-micro powder heating coating involves mixing the nano-micro powder heating coating evenly and allowing it to stand for 5 hours before application. The specific application method is as follows: Two coats are applied. Before the first coat, the nano-micro powder heating coating is mixed with water at a volume ratio of 1:15, and then sprayed. Before the second coat, the nano-micro powder heating coating is mixed with water at a volume ratio of 1:10, and then sprayed. The spraying amount of the nano-micro powder heating coating is 4m³. 2 / 1kg of paint.

[0010] The object to be sprayed can be any one of earthen wall, cement wall, metal sheet, wood sheet or foam board.

[0011] The object to be sprayed is a greenhouse earthen wall, and the spraying is applied to the sun-facing rammed earth wall inside the greenhouse.

[0012] The conductive carbon black micropowder and the highly conductive carbon black micropowder described in this invention are pure black and hard, making them more conducive to absorbing light energy. This allows the coating to convert light energy into heat while absorbing it, thus extending the time for the coating to store and release heat. Carboxymethyl cellulose acts as a thickener and emulsifier, while ethanolamine adjusts and stabilizes the overall pH value of the coating. The addition of carrageenan facilitates the uniform mixing of the conductive and highly conductive carbon black micropowders, and during use, the diluted coating further promotes the uniform suspension of the conductive and highly conductive carbon black micropowders in the system.

[0013] The nano-micro powder heating coating prepared by this invention has the function of heat absorption and energy storage. It does not produce clumps or cracks, nor does it separate into layers. The main materials, conductive carbon black and ultrafine carbon black powder, do not settle at the bottom, thus preventing uneven coating.

[0014] The final coating formed by this invention is black. Black objects absorb visible light and do not reflect it. This invention utilizes a uniform mixture of conductive carbon black and ultrafine carbon black powder in the coating to absorb light energy. This light energy is then stored in the coating through photoelectric coupling. When the temperature decreases, the energy is converted into heat and released, thus maintaining the temperature. The addition of a corrosion inhibitor makes the coating durable, remaining intact for 5-6 years without peeling.

[0015] Experiments have verified that when the nano-powder heating coating of this invention is sprayed onto the rammed earth wall facing the sun in a greenhouse, based on the conditions of a northern winter, the wall begins to store energy as soon as sunlight shines on it at 9 a.m., and continues to store energy until 5 p.m. The heating can penetrate 20 cm into the wall, and the wall temperature can still reach 30°C by 5 p.m. Attached Figure Description

[0016] Figure 1 The test results are for Example 2 of the present invention, and for Comparative Examples 1 and 2. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and all materials publicly cited herein and cited by them are incorporated herein by reference.

[0019] Equivalent technologies of the specific embodiments described herein that are readily apparent to those skilled in the art through routine experimentation are included in this application.

[0020] Unless otherwise specified, the experimental methods used in the following examples are conventional methods. Unless otherwise specified, the instruments and equipment used in the following examples are all standard laboratory instruments and equipment; unless otherwise specified, the experimental materials used in the following examples were all purchased from regular biochemical reagent stores.

[0021] Example 1: A nano-micro powder heating coating, prepared from the following raw materials by weight: 15 kg of waterborne polyurethane emulsion, 30 kg of conductive carbon black micro powder, 0.1 kg of highly conductive carbon black micro powder, 0.05 kg of carrageenan, 0.4 kg of carboxymethyl cellulose, 1.3 kg of ethanolamine, 30 kg of purified water, and 0.25 kg of preservative oxytetracycline. The particle size of both the conductive carbon black micro powder and the highly conductive carbon black micro powder is 1000 mesh.

[0022] The method for preparing the nano-micro powder heating coating is as follows: waterborne polyurethane emulsion, conductive carbon black micro powder, highly conductive carbon black micro powder, carboxymethyl cellulose, ethanolamine, and preservative are mixed evenly with pure water at 40-45℃, and then carrageenan is added and mixed evenly.

[0023] The aforementioned nano-powder heating coating is applied to greenhouses. After the nano-powder heating coating is mixed evenly and allowed to stand for 5 hours, it is then applied. The specific application method is as follows: It is applied in two coats. Before the first coat, the nano-powder heating coating is mixed with water at a volume ratio of 1:15, and then sprayed. Before the second coat, the nano-powder heating coating is mixed with water at a volume ratio of 1:10, and then sprayed. The spraying amount of the nano-powder heating coating is 4m³. 2 / 1kg of paint.

[0024] Example 2: A nano-micro powder heating coating is prepared from the following raw materials by weight: 18 kg of waterborne polyurethane emulsion, 40 kg of conductive carbon black micro powder, 0.2 kg of highly conductive carbon black micro powder, 0.07 kg of carrageenan, 0.5 kg of carboxymethyl cellulose, 0.5 kg of ethanolamine, 40 kg of purified water, and 0.3 kg of preservative oxytetracycline; the method for preparing the nano-micro powder heating coating is the same as that described in Example 1.

[0025] The aforementioned nano-powder heating coating is applied to a cement wall. After the nano-powder heating coating is mixed evenly, it is left to stand for 5 hours before being sprayed.

[0026] Example 3: A nano-powder heating coating, prepared from the following raw materials by weight: 20 kg of waterborne polyurethane emulsion, 45 kg of conductive carbon black micropowder, 0.3 kg of highly conductive carbon black micropowder, 0.1 kg of carrageenan, 0.6 kg of carboxymethyl cellulose, 1.7 kg of ethanolamine, 50 kg of purified water, and 0.5 kg of oxytetracycline preservative. The method for preparing the nano-powder heating coating is the same as that described in Example 1.

[0027] The aforementioned nano-micro powder heating coating is applied to metal sheets. After the nano-micro powder heating coating is mixed evenly, it is left to stand for 5 hours before being sprayed.

[0028] Example 4: A nanoparticle-based heating coating, prepared from the following raw materials by weight: 17 kg of waterborne polyurethane emulsion, 38 kg of conductive carbon black microparticles, 0.1 kg of highly conductive carbon black microparticles, 0.08 kg of carrageenan, 0.4 kg of carboxymethyl cellulose, 1.6 kg of ethanolamine, 42 kg of purified water, and 0.4 kg of oxytetracycline preservative. The method for preparing the nanoparticle-based heating coating is the same as that described in Example 1.

[0029] The aforementioned nano-powder heating coating is applied to wood-based panels. After the nano-powder heating coating is mixed evenly, it is left to stand for 5 hours before being sprayed.

[0030] Experimental Example: The effect of the nano-micro powder heating coating described in Example 2 of this invention was tested in a greenhouse in Changzhi City, Shanxi Province in October 2023. The rammed earth wall facing the sun of the greenhouse was sprayed with the coating in two stages. Before the first spray, the nano-micro powder heating coating was mixed with water at a volume ratio of 1:15, and then sprayed. Before the second spray, the nano-micro powder heating coating was mixed with water at a volume ratio of 1:10, and then sprayed. The amount of nano-micro powder heating coating sprayed was 4m³. 2 / 1kg of paint.

[0031] After a full day of sunlight exposure, a 15cm deep hole was drilled in the wall, and the temperature at a depth of 20cm was measured. A static wind test was conducted inside the shed during the experiment. The test results are as follows: Figure 1 As shown. Comparative Example 1 is the test result of the slurry described in Example 2 of Invention Patent 202210544523.7; Comparative Example 2 is the wall without any treatment, and then the temperature of the wall at a depth of 15cm is tested.

[0032] Experimental results show that the nano-powder heating coating of this invention can allow heat to penetrate to a depth of 20cm in the rammed earth layer, and the temperature can be maintained at around 30℃, while the temperature of the untreated rammed earth layer at a depth of 15cm can drop to as low as 5℃. Clearly, the coating of this invention can effectively store and store energy. Furthermore, the coating of this invention can release heat for up to 10 hours, while the untreated coating can only release heat for 3-4 hours.

[0033] Testing revealed that the slurry described in Comparative Example 1 cracked and peeled after only 6 months of application, resulting in a reduced lifespan. In contrast, the coating described in Example 2 of this invention has not peeled since October 2023. Furthermore, the coating of this invention, when sprayed onto a single rammed earth wall inside a greenhouse, achieves the energy storage and insulation effect for the entire greenhouse. The use of conductive carbon black micropowder and highly conductive carbon black micropowder gives the coating a certain degree of conductivity, thus enabling the conversion of light energy into heat energy during use. Compared to the slurry described in Patent 202210544523.7, the coating prepared in this invention heats up faster, stores more energy, and remains crack-free and peel-free even after 5-6 years of use, further improving the cost and extending the lifespan of the coating.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nano-micro powder heating coating, characterized in that: It is prepared from the following raw materials in parts by weight: 15-20 parts of waterborne polyurethane emulsion, 30-45 parts of conductive carbon black micro powder, 0.1-0.3 parts of highly conductive carbon black micro powder, 0.05-0.1 parts of carrageenan, 0.4-0.6 parts of carboxymethyl cellulose, 1.3-1.7 parts of ethanolamine, 30-50 parts of purified water, and 0.25-0.5 parts of preservative; wherein: the preservative is oxytetracycline.

2. The nano-micro powder heating coating according to claim 1, characterized in that: It is prepared from the following raw materials in parts by weight: 18 parts of waterborne polyurethane emulsion, 40 parts of conductive carbon black micro powder, 0.2 parts of highly conductive carbon black micro powder, 0.07 parts of carrageenan, 0.5 parts of carboxymethyl cellulose, 1.5 parts of ethanolamine, 40 parts of purified water, and 0.3 parts of preservative; wherein: the preservative is oxytetracycline.

3. The nano-micro powder heating coating according to claim 1 or 2, characterized in that: The particle size of both the conductive carbon black micro powder and the extra-conductive carbon black micro powder is 1000 mesh.

4. A method for preparing the nano-powder heated coating according to claim 1 or 2, characterized in that: The specific method is as follows: Mix waterborne polyurethane emulsion, conductive carbon black micro powder, highly conductive carbon black micro powder, carboxymethyl cellulose, ethanolamine, and preservative evenly with pure water at 40-45℃, and then add carrageenan and mix evenly.

5. The method of applying the nano-micro powder heating coating according to claim 1 or 2, characterized in that: After thoroughly mixing the nano-powder heating coating, let it stand for 5 hours before application. The specific application method is as follows: Apply in two coats. Before the first coat, mix the nano-powder heating coating with water at a volume ratio of 1:15, then spray. Before the second coat, mix the nano-powder heating coating with water at a volume ratio of 1:10, then spray. The spraying amount of the nano-powder heating coating is 4m³. 2 / 1kg of paint.

6. The application according to claim 5, characterized in that: The object to be sprayed can be any one of earthen wall, cement wall, metal sheet, wood sheet or foam board.

7. The application according to claim 6, characterized in that: The object to be sprayed is a greenhouse earthen wall, and the spraying is applied to the sun-facing rammed earth wall inside the greenhouse.

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