A low-odor, environmentally friendly waterproof coating and its preparation method

Abstract

This invention relates to the field of waterproof coating technology, specifically disclosing an odor-free and environmentally friendly waterproof coating, comprising the following raw materials in parts by weight: 20-30 parts acrylic emulsion, 10-15 parts modified nano-carbon-regulated whiskering agent, 4-7 parts bentonite modifier, 2-4 parts polyether defoamer, 2-4 parts Tween-80, 1-3 parts sodium carboxymethyl cellulose, 1-4 parts silane coupling agent KH560, and 35-45 parts water. This invention's odor-free and environmentally friendly waterproof coating utilizes acrylic emulsion combined with polyether defoamer, Tween-80, sodium carboxymethyl cellulose, silane coupling agent KH560, and modified nano-carbon-regulated whiskering agent and bentonite modifier. Through the synergistic effect of the modified nano-carbon-regulated whiskering agent and bentonite modifier, the resulting product exhibits coordinated improvements in formaldehyde removal and crack resistance, as well as significant water resistance and stability.

Description

Technical Field

[0001] This invention relates to the field of waterproof coating technology, specifically to an odor-free and environmentally friendly waterproof coating and its preparation method. Background Technology

[0002] After curing, the waterproof coating forms a waterproof film with certain extensibility, elasticity, crack resistance, impermeability, and weather resistance, providing waterproofing, seepage prevention, and protection. Waterproof coatings also have good temperature adaptability, are easy to apply, and are convenient to repair and maintain.

[0003] In order to improve the formaldehyde removal efficiency of existing environmentally friendly waterproof coatings, activated carbon raw materials are added. However, this can easily lead to a decrease in the crack resistance of the product. It is difficult to achieve a coordinated improvement in formaldehyde removal and crack resistance. In addition, the product has poor water resistance stability, which further limits the product's efficiency. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide an odor-free, environmentally friendly waterproof coating and its preparation method, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] This invention provides an odor-free, environmentally friendly, waterproof coating, comprising the following raw materials in parts by weight:

[0007] 20-30 parts acrylic emulsion, 10-15 parts modified nano-carbon whisker agent, 4-7 parts bentonite modifier, 2-4 parts polyether defoamer, 2-4 parts Tween-80, 1-3 parts sodium carboxymethyl cellulose, 1-4 parts silane coupling agent KH560, and 35-45 parts water.

[0008] Preferably, the waterproof coating comprises the following raw materials in parts by weight:

[0009] 25 parts acrylic emulsion, 12.5 parts modified nano-carbon whisker agent, 5.5 parts bentonite modifier, 3 parts polyether defoamer, 3 parts Tween-80, 2 parts sodium carboxymethyl cellulose, 2.5 parts silane coupling agent KH560, and 40 parts water.

[0010] Preferably, the preparation method of the modified nano-carbon-regulated whisker agent is as follows:

[0011] S01: Mix 4-7 parts of silicon carbide whiskers, 1-3 parts of nano-silica sol, 6-10 parts of sodium lignosulfonate solution, and 2-5 parts of lanthanum chloride solution and ball mill them. The ball milling speed is 1000-1500 r / min and the ball milling time is 1-2 h. After the ball milling is completed, whisker conditioner is obtained.

[0012] S02: Heat-treat nano-carbon at 210-230℃ for 5-10 min, then cool it to 55-60℃ at a rate of 2-4℃ / min and hold it at that temperature.

[0013] S03: Immerse the heat-insulated nano-carbon into a sufficient amount of modification liquid for immersion modification treatment, followed by water washing and drying to obtain the modified nano-carbon agent.

[0014] S04: The modified nano-carbon agent and whisker regulator are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is washed with water and dried to obtain the modified nano-carbon regulated whisker agent.

[0015] Preferably, the sodium lignosulfonate solution has a mass fraction of 10-15%; and the lanthanum chloride solution has a mass fraction of 2-5%.

[0016] Preferably, the immersion modification treatment is performed at a rotation speed of 750-850 r / min and a treatment time of 20-30 min.

[0017] Preferably, the modified solution is a mixture of chitosan solution, yttrium nitrate solution and citric acid in a weight ratio of 5:2:1; wherein the mass fraction of the chitosan solution is 3-6% and the mass fraction of the yttrium nitrate solution is 2-5%.

[0018] Preferably, the bentonite modifier is prepared by:

[0019] S101: First, mix the bentonite thoroughly in a sufficient amount of hydrochloric acid solution, then wash with water and dry it. Then, heat it to 175-185℃ at a rate of 1-3℃ / min and hold it for 5-10 min. Next, heat it to 305-315℃ at a rate of 2-4℃ / min and hold it for 10-15 min. Finally, air cool it to room temperature.

[0020] S102: Disperse and stir 6-10 parts of S101 bentonite, 2-5 parts of sodium dodecylbenzenesulfonate, 1-3 parts of glycolic acid and 8-14 parts of sodium alginate solution evenly, and finally wash with water and dry to obtain bentonite modifier.

[0021] Preferably, the sodium alginate solution has a mass fraction of 10-15%.

[0022] Preferably, the hydrochloric acid solution has a mass fraction of 2-5%.

[0023] This invention also provides a method for preparing an odor-free, environmentally friendly waterproof coating, comprising the following steps:

[0024] The modified nano-carbon-modified whiskering agent, bentonite modifier, silane coupling agent KH560, and water are first mixed thoroughly. Then, the thoroughly mixed material is added to the acrylic emulsion. Subsequently, polyether defoamer, Tween-80, and sodium carboxymethyl cellulose are added and mixed thoroughly to obtain an environmentally friendly waterproof coating.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention relates to an odor-free, environmentally friendly, and waterproof coating. The coating utilizes acrylic emulsion combined with polyether defoamers, Tween-80, sodium carboxymethyl cellulose, silane coupling agent KH560, and modified nano-carbon-modified whisker agents and bentonite modifiers. Through the synergistic effect of the modified nano-carbon-modified whisker agents and bentonite modifiers, the resulting product exhibits improved formaldehyde removal and crack resistance, as well as significant water resistance and stability. The modified nano-carbon-modified whisker agents are optimized by heat-treating nano-carbon at 210-230℃ for 5-10 minutes, followed by cooling to 55-60℃ at a rate of 2-4℃ / min. Further modification with a mixture of polysaccharide solution, yttrium nitrate solution, and citric acid enhances the synergistic effect between nano-carbon and the whisker modifiers. The silicon carbide whiskers, nano-silica sol, sodium lignosulfonate solution, and lanthanum chloride solution work together to harmonize and enhance the coating, resulting in a modified nano-carbon-modified... The whisker agent in this product uses nano-carbon as the main agent to enhance the formaldehyde removal efficiency. The silicon carbide whiskers are distributed in the matrix, enhancing the synergistic effect. This further improves the formaldehyde removal and crack resistance of the product. The bentonite modifier is made by thoroughly mixing bentonite in a sufficient amount of hydrochloric acid solution, then washing and drying it. The temperature is then raised to 175-185℃ at a rate of 1-3℃ / min and held for 5-10min. Subsequently, the temperature is raised to 305-315℃ at a rate of 2-4℃ / min and held for another 10-15min. This optimizes the interlayer spacing and activity of the bentonite flakes, thereby enhancing the water resistance stability of the system. Furthermore, the combination with sodium dodecylbenzenesulfonate, glycolic acid, and sodium alginate solution further enhances the synergistic effect between the bentonite modifier and the modified nano-carbon-regulated whisker agent. This results in further coordinated improvement of the formaldehyde removal and crack resistance of the product, as well as significant improvement in the water resistance stability. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0028] This embodiment of an odor-free, environmentally friendly, waterproof coating comprises the following raw materials in parts by weight:

[0029] 20-30 parts acrylic emulsion, 10-15 parts modified nano-carbon whisker agent, 4-7 parts bentonite modifier, 2-4 parts polyether defoamer, 2-4 parts Tween-80, 1-3 parts sodium carboxymethyl cellulose, 1-4 parts silane coupling agent KH560, and 35-45 parts water.

[0030] The waterproof coating of this embodiment comprises the following raw materials in parts by weight:

[0031] 25 parts acrylic emulsion, 12.5 parts modified nano-carbon whisker agent, 5.5 parts bentonite modifier, 3 parts polyether defoamer, 3 parts Tween-80, 2 parts sodium carboxymethyl cellulose, 2.5 parts silane coupling agent KH560, and 40 parts water.

[0032] The preparation method of the modified nano-carbon regulated whisker agent in this embodiment is as follows:

[0033] S01: Mix 4-7 parts of silicon carbide whiskers, 1-3 parts of nano-silica sol, 6-10 parts of sodium lignosulfonate solution, and 2-5 parts of lanthanum chloride solution and ball mill them. The ball milling speed is 1000-1500 r / min and the ball milling time is 1-2 h. After the ball milling is completed, whisker conditioner is obtained.

[0034] S02: Heat-treat nano-carbon at 210-230℃ for 5-10 min, then cool it to 55-60℃ at a rate of 2-4℃ / min and hold it at that temperature.

[0035] S03: Immerse the heat-insulated nano-carbon into a sufficient amount of modification liquid for immersion modification treatment, followed by water washing and drying to obtain the modified nano-carbon agent.

[0036] S04: The modified nano-carbon agent and whisker regulator are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is washed with water and dried to obtain the modified nano-carbon regulated whisker agent.

[0037] In this embodiment, the sodium lignosulfonate solution has a mass fraction of 10-15%; the lanthanum chloride solution has a mass fraction of 2-5%.

[0038] In this embodiment, the immersion modification treatment speed is 750-850 r / min, and the treatment time is 20-30 min.

[0039] The modified solution in this embodiment is prepared by mixing chitosan solution, yttrium nitrate solution and citric acid in a weight ratio of 5:2:1; wherein the mass fraction of chitosan solution is 3-6% and the mass fraction of yttrium nitrate solution is 2-5%.

[0040] The preparation method of the bentonite modifier in this embodiment is as follows:

[0041] S101: First, mix the bentonite thoroughly in a sufficient amount of hydrochloric acid solution, then wash with water and dry it. Then, heat it to 175-185℃ at a rate of 1-3℃ / min and hold it for 5-10 min. Next, heat it to 305-315℃ at a rate of 2-4℃ / min and hold it for 10-15 min. Finally, air cool it to room temperature.

[0042] S102: Disperse and stir 6-10 parts of S101 bentonite, 2-5 parts of sodium dodecylbenzenesulfonate, 1-3 parts of glycolic acid and 8-14 parts of sodium alginate solution evenly, and finally wash with water and dry to obtain bentonite modifier.

[0043] The sodium alginate solution in this embodiment has a mass fraction of 10-15%.

[0044] The hydrochloric acid solution in this embodiment has a mass fraction of 2-5%.

[0045] The preparation method of the odor-free and environmentally friendly waterproof coating in this embodiment includes the following steps:

[0046] The modified nano-carbon-modified whiskering agent, bentonite modifier, silane coupling agent KH560, and water are first mixed thoroughly. Then, the thoroughly mixed material is added to the acrylic emulsion. Subsequently, polyether defoamer, Tween-80, and sodium carboxymethyl cellulose are added and mixed thoroughly to obtain an environmentally friendly waterproof coating.

[0047] Example 1.

[0048] This embodiment of an odor-free, environmentally friendly, waterproof coating comprises the following raw materials in parts by weight:

[0049] 20 parts acrylic emulsion, 10 parts modified nano-carbon whisker agent, 4 parts bentonite modifier, 2 parts polyether defoamer, 2 parts Tween-80, 1 part sodium carboxymethyl cellulose, 1 part silane coupling agent KH560, and 35 parts water.

[0050] The preparation method of the modified nano-carbon regulated whisker agent in this embodiment is as follows:

[0051] S01: 4 parts silicon carbide whiskers, 1 part nano silica sol, 6 parts sodium lignosulfonate solution, and 2 parts lanthanum chloride solution were mixed and ball-milled at a speed of 1000 r / min for 1 h. After ball milling, whisker conditioner was obtained.

[0052] S02: Heat-treat nano-carbon at 210℃ for 5 min, then cool it to 55℃ at a rate of 2℃ / min and hold it at that temperature.

[0053] S03: Immerse the heat-insulated nano-carbon into a sufficient amount of modification liquid for immersion modification treatment, followed by water washing and drying to obtain the modified nano-carbon agent.

[0054] S04: The modified nano-carbon agent and whisker regulator are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is washed with water and dried to obtain the modified nano-carbon regulated whisker agent.

[0055] In this embodiment, the sodium lignosulfonate solution has a mass fraction of 10%; the lanthanum chloride solution has a mass fraction of 2%.

[0056] In this embodiment, the immersion modification treatment speed is 750 r / min, and the treatment time is 20 min.

[0057] The modified solution in this embodiment is prepared by mixing chitosan solution, yttrium nitrate solution and citric acid in a weight ratio of 5:2:1; wherein the mass fraction of chitosan solution is 3% and the mass fraction of yttrium nitrate solution is 2%.

[0058] The preparation method of the bentonite modifier in this embodiment is as follows:

[0059] S101: First, mix the bentonite thoroughly in a sufficient amount of hydrochloric acid solution, then wash with water and dry it. Then, heat it to 175°C at a rate of 1°C / min and hold it for 5 minutes. Then, heat it to 305°C at a rate of 2°C / min and hold it for 10 minutes. Finally, air cool it to room temperature.

[0060] S102: Disperse and stir 6 parts of S101 bentonite, 2 parts of sodium dodecylbenzenesulfonate, 3 parts of glycolic acid and 8-14 parts of sodium alginate solution evenly, and finally wash and dry to obtain bentonite modifier.

[0061] The sodium alginate solution in this embodiment has a mass fraction of 10%.

[0062] The hydrochloric acid solution in this embodiment has a mass fraction of 2%.

[0063] The preparation method of the odor-free and environmentally friendly waterproof coating in this embodiment includes the following steps:

[0064] The modified nano-carbon-modified whiskering agent, bentonite modifier, silane coupling agent KH560, and water are first mixed thoroughly. Then, the thoroughly mixed material is added to the acrylic emulsion. Subsequently, polyether defoamer, Tween-80, and sodium carboxymethyl cellulose are added and mixed thoroughly to obtain an environmentally friendly waterproof coating.

[0065] Example 2.

[0066] This embodiment of an odor-free, environmentally friendly, waterproof coating comprises the following raw materials in parts by weight:

[0067] 30 parts acrylic emulsion, 15 parts modified nano-carbon whisker agent, 7 parts bentonite modifier, 4 parts polyether defoamer, 4 parts Tween-80, 3 parts sodium carboxymethyl cellulose, 4 parts silane coupling agent KH560, and 45 parts water.

[0068] The preparation method of the modified nano-carbon regulated whisker agent in this embodiment is as follows:

[0069] S01: 7 parts silicon carbide whiskers, 3 parts nano silica sol, 10 parts sodium lignosulfonate solution, and 5 parts lanthanum chloride solution were mixed and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, whisker conditioner was obtained.

[0070] S02: Heat-treat nano-carbon at 230℃ for 10 min, then cool it to 60℃ at a rate of 4℃ / min and hold it at that temperature.

[0071] S03: Immerse the heat-insulated nano-carbon into a sufficient amount of modification liquid for immersion modification treatment, followed by water washing and drying to obtain the modified nano-carbon agent.

[0072] S04: The modified nano-carbon agent and whisker regulator are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is washed with water and dried to obtain the modified nano-carbon regulated whisker agent.

[0073] In this embodiment, the sodium lignosulfonate solution has a mass fraction of 15%; the lanthanum chloride solution has a mass fraction of 5%.

[0074] In this embodiment, the immersion modification treatment speed is 850 r / min, and the treatment time is 30 min.

[0075] The modified solution in this embodiment is prepared by mixing chitosan solution, yttrium nitrate solution and citric acid in a weight ratio of 5:2:1; wherein the mass fraction of chitosan solution is 6% and the mass fraction of yttrium nitrate solution is 5%.

[0076] The preparation method of the bentonite modifier in this embodiment is as follows:

[0077] S101: First, mix the bentonite thoroughly in a sufficient amount of hydrochloric acid solution, then wash with water and dry it. Then, heat it to 185°C at a rate of 3°C / min and hold it for 10 min. Then, heat it to 315°C at a rate of 4°C / min and hold it for 15 min. Finally, air cool it to room temperature.

[0078] S102: Disperse and stir 10 parts of S101 bentonite, 5 parts of sodium dodecylbenzenesulfonate, 3 parts of glycolic acid and 14 parts of sodium alginate solution evenly, and finally wash with water and dry to obtain bentonite modifier.

[0079] The sodium alginate solution in this embodiment has a mass fraction of 15%.

[0080] The hydrochloric acid solution in this embodiment has a mass fraction of 5%.

[0081] The preparation method of the odor-free and environmentally friendly waterproof coating in this embodiment includes the following steps:

[0082] The modified nano-carbon-modified whiskering agent, bentonite modifier, silane coupling agent KH560, and water are first mixed thoroughly. Then, the thoroughly mixed material is added to the acrylic emulsion. Subsequently, polyether defoamer, Tween-80, and sodium carboxymethyl cellulose are added and mixed thoroughly to obtain an environmentally friendly waterproof coating.

[0083] Example 3.

[0084] This embodiment of an odor-free, environmentally friendly, waterproof coating comprises the following raw materials in parts by weight:

[0085] 25 parts acrylic emulsion, 12.5 parts modified nano-carbon whisker agent, 5.5 parts bentonite modifier, 3 parts polyether defoamer, 3 parts Tween-80, 2 parts sodium carboxymethyl cellulose, 2.5 parts silane coupling agent KH560, and 40 parts water.

[0086] The preparation method of the modified nano-carbon regulated whisker agent in this embodiment is as follows:

[0087] S01: 5.5 parts of silicon carbide whiskers, 2 parts of nano-silica sol, 8 parts of sodium lignosulfonate solution, and 3.5 parts of lanthanum chloride solution were mixed and ball-milled at a speed of 1200 r / min for 1.5 h. After ball milling, whisker conditioner was obtained.

[0088] S02: The nano-carbon was heat-treated at 215℃ for 7.5 min, and then cooled to 58℃ at a rate of 3℃ / min and held at that temperature.

[0089] S03: Immerse the heat-insulated nano-carbon into a sufficient amount of modification liquid for immersion modification treatment, followed by water washing and drying to obtain the modified nano-carbon agent.

[0090] S04: The modified nano-carbon agent and whisker regulator are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 hour. After ball milling, the mixture is washed with water and dried to obtain the modified nano-carbon regulated whisker agent.

[0091] In this embodiment, the sodium lignosulfonate solution has a mass fraction of 12.5%; the lanthanum chloride solution has a mass fraction of 3.5%.

[0092] In this embodiment, the immersion modification treatment speed is 800 r / min, and the treatment time is 25 min.

[0093] The modified solution in this embodiment is prepared by mixing chitosan solution, yttrium nitrate solution and citric acid in a weight ratio of 5:2:1; wherein the mass fraction of chitosan solution is 4.5% and the mass fraction of yttrium nitrate solution is 3.5%.

[0094] The preparation method of the bentonite modifier in this embodiment is as follows:

[0095] S101: First, mix the bentonite thoroughly in a sufficient amount of hydrochloric acid solution, then wash with water and dry it. Then, heat it to 180°C at a rate of 2°C / min and keep it at that temperature for 5-10 minutes. Next, heat it to 310°C at a rate of 3°C / min and keep it at that temperature for 12 minutes. Finally, air cool it to room temperature.

[0096] S102: Disperse and stir 8 parts of S101 bentonite, 3.5 parts of sodium dodecylbenzenesulfonate, 2 parts of glycolic acid and 11 parts of sodium alginate solution evenly, and finally wash and dry to obtain bentonite modifier.

[0097] The sodium alginate solution in this embodiment has a mass fraction of 12.5%.

[0098] The hydrochloric acid solution in this embodiment has a mass fraction of 3.5%.

[0099] The preparation method of the odor-free and environmentally friendly waterproof coating in this embodiment includes the following steps:

[0100] The modified nano-carbon-modified whiskering agent, bentonite modifier, silane coupling agent KH560, and water are first mixed thoroughly. Then, the thoroughly mixed material is added to the acrylic emulsion. Subsequently, polyether defoamer, Tween-80, and sodium carboxymethyl cellulose are added and mixed thoroughly to obtain an environmentally friendly waterproof coating.

[0101] Comparative Example 1.

[0102] Unlike Example 3, no modified nano-carbon-modified whisker agent was added.

[0103] Comparative Example 2.

[0104] Unlike Example 3, no whisker regulator was added in the preparation of the modified nano-carbon regulated whisker agent.

[0105] Comparative Example 3.

[0106] Unlike Example 3, the preparation method of the whisker regulator did not include nano-silica sol or lanthanum chloride solution.

[0107] Comparative Example 4.

[0108] Unlike Example 3, the modified nano-carbon-regulated whisker agent was not prepared using a modified liquid treatment.

[0109] Comparative Example 5.

[0110] Unlike Example 3, no bentonite modifier was added.

[0111] Comparative Example 6.

[0112] Unlike Example 3, S101 treatment was not used in the preparation of the bentonite modifier.

[0113] Comparative Example 7.

[0114] Unlike Example 3, S102 treatment was not used in the preparation of the bentonite modifier.

[0115] The performance of Examples 1-3 and Comparative Examples 1-7, and the results of placing them under 20% humidity for 24 hours, are as follows:

[0116]

[0117] From Examples 1-3 and Comparative Examples 1-7, it was found that...

[0118] The product in Example 3 exhibits excellent fracture formation rate and formaldehyde adsorption rate, while also demonstrating strong performance stability in humid environments. Without the addition of either the modified nano-carbon-regulated whiskering agent or the bentonite modifier, the product's performance tends to deteriorate. The synergistic effect of using both results in the most significant performance improvement. Furthermore, the performance of the product tends to deteriorate if the modified nano-carbon-regulated whiskering agent is not added during preparation, or if the preparation method for the whiskering agent does not include nano-silica sol or lanthanum chloride solution, or if the modified nano-carbon-regulated whiskering agent preparation does not employ a modifying liquid treatment, or if the bentonite modifier preparation does not employ S101 treatment, or if the bentonite modifier preparation does not employ S102 treatment. The modified nano-carbon-regulated whiskering agent and bentonite modifier prepared using the method of this invention exhibit the most significant performance improvement.

[0119] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0120] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An odorless, environmentally friendly, waterproof coating, characterized in that, Including the following parts by weight of raw materials: 20-30 parts acrylic emulsion, 10-15 parts modified nano-carbon whisker agent, 4-7 parts bentonite modifier, 2-4 parts polyether defoamer, 2-4 parts Tween-80, 1-3 parts sodium carboxymethyl cellulose, 1-4 parts silane coupling agent KH560, and 35-45 parts water. The preparation method of the modified nano-carbon regulated whisker agent is as follows: S01: Mix 4-7 parts of silicon carbide whiskers, 1-3 parts of nano-silica sol, 6-10 parts of sodium lignosulfonate solution, and 2-5 parts of lanthanum chloride solution and ball mill them. The ball milling speed is 1000-1500 r / min and the ball milling time is 1-2 h. After the ball milling is completed, whisker conditioner is obtained. S02: Heat-treat nano-carbon at 210-230℃ for 5-10 min, then cool it to 55-60℃ at a rate of 2-4℃ / min and hold it at that temperature. S03: Immerse the heat-insulated nano-carbon into a sufficient amount of modification liquid for immersion modification treatment, followed by water washing and drying to obtain the modified nano-carbon agent. S04: The modified nano-carbon agent and whisker regulator are mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 1 h. After ball milling, the mixture is washed with water and dried to obtain the modified nano-carbon regulated whisker agent. The modified solution is prepared by mixing chitosan solution, yttrium nitrate solution, and citric acid in a weight ratio of 5:2:1; wherein the mass fraction of the chitosan solution is 3-6%; the mass fraction of the yttrium nitrate solution is 2-5%; and the preparation method of the bentonite modifier is as follows: S101: First, mix the bentonite thoroughly in a sufficient amount of hydrochloric acid solution, then wash with water and dry it. Then, heat it to 175-185℃ at a rate of 1-3℃ / min and hold it for 5-10 min. Next, heat it to 305-315℃ at a rate of 2-4℃ / min and hold it for 10-15 min. Finally, air cool it to room temperature. S102: Disperse and stir 6-10 parts of S101 bentonite, 2-5 parts of sodium dodecylbenzenesulfonate, 1-3 parts of glycolic acid and 8-14 parts of sodium alginate solution evenly, and finally wash with water and dry to obtain bentonite modifier.

2. The odor-free, environmentally friendly waterproof coating according to claim 1, characterized in that, The waterproof coating comprises the following raw materials in parts by weight: 25 parts acrylic emulsion, 12.5 parts modified nano-carbon whisker agent, 5.5 parts bentonite modifier, 3 parts polyether defoamer, 3 parts Tween-80, 2 parts sodium carboxymethyl cellulose, 2.5 parts silane coupling agent KH560, and 40 parts water.

3. The odor-free, environmentally friendly, and waterproof coating according to claim 1, characterized in that, The sodium lignosulfonate solution has a mass fraction of 10-15%; the lanthanum chloride solution has a mass fraction of 2-5%.

4. The odor-free, environmentally friendly waterproof coating according to claim 1, characterized in that, The immersion modification treatment is performed at a rotation speed of 750-850 r / min for 20-30 min.

5. The odor-free, environmentally friendly waterproof coating according to claim 1, characterized in that, The sodium alginate solution has a mass fraction of 10-15%.

6. The odor-free, environmentally friendly waterproof coating according to claim 1, characterized in that, The hydrochloric acid solution has a mass fraction of 2-5%.

7. A method for preparing an odor-free, environmentally friendly, waterproof coating as described in any one of claims 1-6, characterized in that, Includes the following steps: The modified nano-carbon-modified whiskering agent, bentonite modifier, silane coupling agent KH560, and water are first mixed thoroughly. Then, the thoroughly mixed material is added to the acrylic emulsion. Subsequently, polyether defoamer, Tween-80, and sodium carboxymethyl cellulose are added and mixed thoroughly to obtain an environmentally friendly waterproof coating.

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