CN117126602A - Preparation method of novel multiphase composite reinforced organosilicon nano coating - Google Patents

Abstract

A novel method for preparing a novel multiphase composite reinforced organosilicon nano-coating is characterized by comprising the following steps: firstly, uniformly dispersing Graphene Oxide (GO) in an ethanol/water mixed solution; secondly, adding a tetraethyl silicate (TEOS) solution into the GO/ethanol/water mixed solution; third, calcium carbonate (CaCO) ₃ ) Dicyclohexylamine nitrite (Dn) and GO@SiOs prepared ₂ Uniformly mixing; fourth, go@sio is stirred at high speed ₂ /CaCO ₃ Dn is uniformly dispersed in the organosilicon coating matrix; and finally, uniformly spraying the multiphase composite reinforced organosilicon nano coating on the 304 steel plate, and continuously curing for 3 days at room temperature. The coating of the invention has excellent mechanical strengthAnd corrosion resistance, so that the coating has long-term stability and durability in a severe marine environment, and provides a high-efficiency and reliable solution for protecting marine engineering equipment and ships.

Description

Preparation method of a new multi-phase composite reinforced silicone nanocoating

Technical field

The invention relates to a multiphase nanocomposite reinforced material and a preparation method for a high-performance coating. Specifically, it relates to a preparation method of a new multiphase composite reinforced silicone nanocoating, which belongs to the technical field of paint coating preparation.

Background technique

The rich resources of the ocean have led mankind into the "golden age" of large-scale ocean development and utilization, which relies heavily on the high-speed operation of ocean engineering equipment and ships. However, the complexity and harshness of the marine environment make these equipment and ships susceptible to physical or chemical corrosion.

As a cost-effective surface treatment method, coating can isolate the material surface from the surrounding medium and effectively protect the substrate from corrosion. Coatings usually have high electrical insulation and water resistance, strong adhesion to the substrate surface, chemical corrosion resistance, and a certain mechanical strength. Therefore, the research and development of coatings is of great significance in the field of marine applications, aiming to enhance the corrosion resistance and lifespan of marine engineering equipment and ships, while reducing environmental pollution and safety accidents in the marine environment.

Silicone coating is a coating material widely used for surface protection and modification. They are usually made from polymers containing silicone groups, which provide high chemical stability, mechanical strength, corrosion resistance and heat resistance. In recent years, significant progress has been made in the research and development of silicone coatings, including the design and synthesis of new silicone coating materials, improvement of coating properties, enhancement of coating adhesion, optimization of coating surface morphology, and They are widely used in various fields.

However, silicone coatings still face some challenges in actual marine environments. Factors such as high salinity, humidity, waves, and ultraviolet radiation in the marine environment may affect the performance and stability of the coating. In addition, marine engineering equipment and ships also require silicone coatings to have longer service life and higher durability under long-term and high-intensity operation.

GO can not only provide _SiO2 with a superior adhesion surface, promote the bonding of _SiO2 with the substrate, thereby enhancing the stability of the silicone coating. Secondly, the large specific surface area of GO can effectively block the entry of corrosion ions, providing a more reliable protective barrier for the silicone coating substrate.

Utilize the characteristics of trace amounts of CaCO ₃ to produce CO ₂ micro gas in an acidic environment. When the coating is eroded by corrosive media, CaCO ₃ will react with acidic substances and release trace amounts of CO ₂ gas. These gases can be adsorbed on the coating surface to form an additional protective layer. This protective effect further enhances the performance of the silicone coating. The corrosion resistance of the silicone coating extends the service life of the silicone coating.

Contents of the invention

The purpose of this invention is to provide a preparation method of an organic silicon coating based on multi-phase composite reinforced particles of GO@SiO ₂ and CaCO ₃ in order to solve the problems of existing coatings being difficult to meet the requirements of marine anti-corrosion and poor comprehensive performance. Meeting the requirements for the use of marine engineering equipment and ships, this coating has excellent corrosion resistance and durability, and can effectively protect the coating substrate in harsh marine environments to increase the service life of marine engineering equipment and ships and reduce environmental impact. contamination and safety risks.

The technical solution of the present invention is:

A method for preparing a new type of multi-phase composite reinforced silicone nano-coating, which is characterized by: it includes the following steps:

(1) Ultrasonic dispersion treatment: Pour ethanol, water, and graphene oxide (GO) into a glass measuring cup, use an intelligent ultrasonic processor to ultrasonically disperse it, and then add concentrated ammonia to adjust the pH of the mixed solution to an alkaline environment to obtain GO/ethanol/ water mixed solution;

(2) Hydrolysis reaction: Weigh the TEOS solution and add it to the GO/ethanol/water mixed solution in step (1), first disperse it ultrasonically, and then magnetically stir at room temperature to fully complete the SiO ₂ hydrolysis reaction;

(3) Preparation of GO@SiO ₂ suspension: Add 3-aminopropyltriethoxysilane (KH-500) to the ethanol solution, adjust the pH to an acidic environment with acetic acid, disperse with ultrasound, and mix the prepared KH- 500 coupling agent solution is added to the GO/ethanol/water/TEOS solution and magnetically stirred to completely combine GO with the hydrolyzed SiO ₂ to form a GO@SiO ₂ suspension;

(4) GO@SiO ₂ drying treatment: Centrifuge the GO@SiO ₂ suspension in step (3) with a desktop electric centrifuge, add deionized water, and repeat the operation 3 to 5 times until the pH of the GO@SiO ₂ aqueous solution It is neutral; dry GO@SiO ₂ in a vacuum drying oven to obtain GO@SiO ₂ nanocomposite powder;

(5) Preparation of GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles: Mix the GO@SiO ₂ nano-composite powder, CaCO3 and Dn in step (4) in a ratio of 18:9:1, and then add Perform uniform dispersion treatment in a ball mill tank to prepare GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles;

(6) Preparation of 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organic silicone coating: Weigh the GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles in step (5) and add to the silicone In the base coating; after high-speed stirring and dispersion, 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organic silicone coating is obtained;

(7) Preparation of SiNC2.0 coating: Mix step (6) with the silane coupling agent, and spray it on the steel plate with a high-pressure spray gun to form a multi-phase composite reinforced silicone nanocoating (SiNC2.0). The curing process is Lasts for 3 days at room temperature.

The key devices involved in the present invention are ultrasonic dispersion equipment, vacuum drying oven, high-speed centrifugal equipment, and high-pressure spray guns.

As a further improvement of the present invention, the service performance and lifespan of the silicone coating are further improved by preparing multi-phase composite reinforced particles of GO@SiO ₂ and CaCO ₃ .

The beneficial effects of the present invention are:

The present invention makes full use of the large specific surface area and mechanical properties of GO by cleverly utilizing multi-phase composite reinforced particles and organic silicon coating technology, and successfully constructing the organic silicon coating by preparing GO@SiO ₂ /CaCO ₃ /Dn, forming The stable coating matrix effectively isolates the erosion of corrosive ions, thereby significantly improving the corrosion resistance of the coating; using the property of CaCO ₃ to generate CO ₂ micro gas in an acidic environment, an additional protective layer is achieved on the coating surface ; Combining nanomaterials such as GO@SiO ₂ and CaCO ₃ with silicone coatings, combining the advantages of GO@SiO ₂ and CaCO ₃ , providing the coating with excellent mechanical strength and corrosion resistance, making the coating It has long-term stability and durability in harsh marine environments, providing an efficient and reliable solution for the protection of marine engineering equipment and ships.

Description of the drawings

Figure 1 shows the surface cleanliness of 304 steel plates sprayed with pure silicone coating after soaking for 18 months.

Figure 2 shows the surface cleanliness of the 304 steel plate sprayed with the new multi-phase composite reinforced silicone nano-coating according to the embodiment of the present invention after soaking for 18 months.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and examples.

Example 1.

A new method for preparing a new multi-phase composite reinforced silicone nanocoating. The specific steps are:

(1) Ultrasonic dispersion treatment: Measure 600mL ethanol and 300mL water into a 2L glass measuring cup, weigh 3.0g graphene oxide (GO) and pour it into the glass measuring cup, use an intelligent ultrasonic processor to ultrasonically disperse for 60 minutes, add concentrated ammonia water to adjust the mixing The pH of the solution should be adjusted to an alkaline environment (not less than 7).

(2) Hydrolysis reaction: Weigh 15.0 ml of TEOS solution and add it to the GO/ethanol/water mixed solution in step (1). After ultrasonic dispersion for 1 hour, stir magnetically at room temperature for 24 hours to fully complete the SiO ₂ hydrolysis reaction.

(3) Preparation of GO@SiO ₂ suspension: Add 0.25g 3-aminopropyltriethoxysilane (KH-500) into 12ml ethanol solution, adjust the pH to an acidic environment with acetic acid, and disperse ultrasonically for 30 minutes. Add the prepared KH-500 coupling agent solution to the GO/ethanol/water/TEOS solution and stir magnetically for 10 hours to completely combine GO with the hydrolyzed SiO ₂ to form a GO@SiO ₂ suspension.

(4) GO@SiO ₂ drying treatment: Centrifuge the GO@SiO ₂ suspension in step (3) with a desktop electric centrifuge, add deionized water, and repeat the operation 3 to 5 times until the pH of the GO@SiO ₂ aqueous solution For neutral. GO@ _SiO2 was dried in a vacuum drying oven with the temperature set to 70 °C for 8 hours.

(5) Preparation of GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles: Mix the GO@SiO ₂ nano-composite powder, CaCO3 and Dn in step (4) in a ratio of 18:9:1, and then add Conduct uniform dispersion treatment in a ball mill tank to prepare GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles.

(6) Preparation of 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organosilicon coating: Weigh 6.0g GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles from step (5) and add to 294.0 g in silicone matrix coatings. After high-speed stirring and dispersion, 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organic silicone coating was obtained.

(7) Preparation of SiNC2.0 coating: Mix step (6) with the silane coupling agent in a ratio of 20:1, and use a high-pressure spray gun to prepare a multiphase composite reinforced silicone nanocoating (SiNC2.0) on the 304 steel plate. ), the curing process lasts for 3 days at room temperature.

Example 2.

A new method for preparing a new multi-phase composite reinforced silicone nanocoating. The specific steps are:

(1) Ultrasonic dispersion treatment: First, during the preparation process, ensure that the solution volume is accurate by taking 600 mL of ethanol and 300 mL of water into a 2L glass measuring cup. Subsequently, take 3.0 g of GO and pour it into a glass measuring cup. In this step, the key is to use a smart ultrasonic processor with specific parameter settings such as frequency, power and time for 60 minutes of ultrasonic dispersion. This process helps to uniformly disperse GO particles in the solution. Next, concentrated ammonia is introduced to adjust the pH of the mixed solution to an alkaline environment in a precise amount, thereby creating reaction conditions conducive to the formation of _SiO2 .

(2) Hydrolysis reaction: In this step, first, take 15.0 ml of TEOS solution and gradually add it to the GO/ethanol/water mixed solution in step (1). After that, ultrasonic dispersion treatment was performed for 1 hour, followed by magnetic stirring at room temperature for 24 hours. This process ensures that the SiO ₂ hydrolysis reaction proceeds fully, thereby forming a stable SiO ₂ coating on the surface of GO particles.

(3) Preparation of GO@SiO ₂ suspension: In this step, first add 0.25g KH-500 to 12ml of ethanol solution, and then adjust the pH to an acidic environment by adding an appropriate amount of acetic acid. Subsequently, ultrasonic dispersion treatment was performed for 30 minutes. Next, the prepared KH-500 coupling agent solution was gradually added to the previously prepared GO/ethanol/water/TEOS solution. Magnetic stirring was performed for 10 hours to ensure that GO and hydrolyzed _SiO2 were fully combined to form a GO@ _SiO2 suspension.

(4) GO@SiO ₂ drying treatment: In this step, first use a desktop electric centrifuge to centrifuge the prepared GO@SiO ₂ suspension, and add deionized water several times to achieve the neutrality of the suspension. pH. Subsequently, the GO@SiO ₂ suspension was placed into a vacuum drying box and dried continuously for 8 hours with the temperature set to 70 °C. This step ensures the solid-state morphology and drying stability of GO@ _SiO2 .

(5) Preparation of GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles: In this step, according to the ratio of 18:9:1, the previously prepared GO@SiO2 nano-composite powder, CaCO3 and Dn Mix. Subsequently, the mixture was added to a ball mill tank for uniform dispersion. This step ensures the uniform distribution and interaction of different components, and finally obtains GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles.

(6) Preparation of 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organic silicone coating: In this step, measure 6.0g of GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles and add them Add to 294.0g of silicone base paint. Through high-speed stirring and dispersion, ensure that the GO@SiO ₂ /CaCO ₃ /Dn particles are evenly dispersed in the silicone coating, forming a 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organic silicone coating.

(7) Preparation of SiNC2.0 coating: Finally, in this step, mix the coating prepared in step (6) with the silane coupling agent in a ratio of 20:1. The mixed paint is sprayed on the 304 steel plate through a high-pressure spray gun to form a multi-phase composite reinforced silicone nano-coating (SiNC2.0). During the entire preparation process, the curing process of the coating lasted for 3 days at room temperature to ensure the stability and performance of the coating.

Example 3.

A new method for preparing a new multi-phase composite reinforced silicone nanocoating. The specific steps are:

(1) Ultrasonic dispersion treatment: First, during the preparation process, ensure that the solution volume is accurate by taking 600 mL of ethanol and 300 mL of water into a 2L glass measuring cup. Subsequently, take 3.0 g of GO and pour it into a glass measuring cup. In this step, the key is to use an intelligent ultrasonic generator with specific parameter settings such as frequency, power and time (specific values are frequency of 28KHZ, power of 1401W and time of 60mins), so that GO is evenly dispersed in the solution. This process helps to uniformly disperse GO particles in the solution. Next, concentrated ammonia (AR, 25-28%) is introduced in a precise amount to adjust the pH of the mixed solution to an alkaline environment (the optimum pH value is between 7 and 8), thereby creating a reaction conducive to the formation of SiO ₂ condition.

(2) Hydrolysis reaction: In this step, first, take 15.0 ml of TEOS solution and gradually add it to the GO/ethanol/water mixed solution in step (1). After that, ultrasonic dispersion treatment was performed for 1 hour, followed by magnetic stirring at room temperature for 24 hours. This process ensures that the SiO ₂ hydrolysis reaction proceeds fully, thereby forming a stable SiO ₂ coating on the surface of GO particles.

(3) Preparation of GO@SiO ₂ suspension: In this step, first add 0.25g KH-500 to 12ml ethanol solution, and then adjust the pH to an acidic environment by adding an appropriate amount of acetic acid (pH value is 6~ Best between 7). Subsequently, ultrasonic dispersion treatment was performed for 30 minutes. Next, the prepared KH-500 coupling agent solution was gradually added to the previously prepared GO/ethanol/water/TEOS solution. Magnetic stirring was performed for 10 hours to ensure that GO and hydrolyzed _SiO2 were fully combined to form a GO@ _SiO2 suspension.

(4) GO@SiO ₂ drying treatment: In this step, first use a desktop electric centrifuge to centrifuge the prepared GO@SiO ₂ suspension, and add deionized water several times to achieve the neutrality of the suspension. pH. Subsequently, the GO@SiO ₂ suspension was placed into a vacuum drying box and dried continuously for 8 hours with the temperature set to 70 °C. This step ensures the solid-state morphology and drying stability of GO@ _SiO2 .

(5) Preparation of GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles: In this step, according to the ratio of 18:9:1 (weight ratio), the previously prepared GO@SiO ₂ nano-composite Powder, CaCO3 and Dn are mixed. Subsequently, the mixture was added to a ball mill tank for uniform dispersion. This step ensures the uniform distribution and interaction of different components, and finally obtains GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles.

(6) Preparation of 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organic silicone coating: In this step, measure 6.0g of GO@SiO ₂ /CaCO ₃ /Dn multi-phase composite nano-reinforced particles and add them Add to 294.0g of silicone base paint. Through high-speed stirring and dispersion (stirring speed is 1000rpm), ensure that GO@SiO ₂ /CaCO ₃ /Dn particles are evenly dispersed in the silicone coating, forming a uniform 2wt.% GO@SiO ₂ /CaCO ₃ /Dn-organic silicone coating. .

(7) Preparation of SiNC2.0 coating: Finally, in this step, mix the coating prepared in step (6) with the silane coupling agent (KH550) in a ratio of 20:1. The mixed paint is sprayed on the 304 steel plate through a high-pressure spray gun to form a multi-phase composite reinforced silicone nano-coating (SiNC2.0). During the entire preparation process, the curing process of the coating lasted for 3 days at room temperature to ensure the stability and performance of the coating.

After testing, the hardness of the new multi-phase composite reinforced silicone nanocoating (SiNC2.0) prepared in Example 3 reached 10.2HV, the adhesion strength reached 2.8MPa, and the impact strength reached 75kg.cm. Compared with that without adding GO@SiO The hardness and impact strength of the silicone coating of ₂ /CaCO ₃ /Dn increased by 24.4% and 50% respectively; the corrosion voltage increased from 0.142V to 0.199V; as shown in Figure 2, it is in a static state after 18 months For the Taihu Lake water immersion experimental treatment, the surface cleanliness was significantly improved compared to the conventional coating shown in Figure 1.

The multi-phase composite coating of the present invention not only provides a stable coating matrix but also forms an additional protective layer by giving full play to the characteristics of GO@SiO ₂ and CaCO 3 . In addition, it has excellent corrosion resistance, durability and stability in the marine environment, effectively extending the service life of marine engineering equipment and ships. The invention not only provides innovative solutions for coating technology in marine applications, but also has a positive impact on environmental protection and safety.

(The substantive content of Embodiments 1, 2, and 3 is the same, but the expressions are different. If other parameters do not change, it is recommended to retain only one embodiment 3)

The parts not involved in the present invention are the same as those in the prior art or can be implemented using the prior art.

Claims (8)

1. A preparation method of a novel multiphase composite reinforced organosilicon nano coating is characterized by comprising the following steps: it comprises the following steps:

(1) Ultrasonic dispersion treatment: pouring ethanol, water and Graphene Oxide (GO) into a glass measuring cup, ultrasonically dispersing by using an intelligent ultrasonic processor, and then adding concentrated ammonia water to adjust the pH of the mixed solution to an alkaline environment to obtain a GO/ethanol/water mixed solution;

(2) Hydrolysis reaction: weighing TEOS solution, adding into the GO/ethanol/water mixed solution obtained in the step (1), performing ultrasonic dispersion, and magnetically stirring at room temperature to obtain SiO ₂ The hydrolysis reaction is fully completed;

(3)GO@SiO ₂ preparation of the suspension: adding 3-aminopropyl triethoxysilane (KH-500) into ethanol solution, adjusting pH to acidic environment with acetic acid, ultrasonic dispersing, adding prepared KH-500 coupling agent solution into GO/ethanol/water/TEOS solution, magnetically stirring to obtain GO and hydrolyzed SiO ₂ Fully combine to form GO@SiO ₂ A suspension;

(4)GO@SiO ₂ and (3) drying: go@sio of step (3) ₂ Centrifuging the suspension by using a desk type electric centrifuge, adding deionized water, and repeating the operation for 3-5 times until GO@SiO is obtained ₂ The pH of the aqueous solution is neutral; go@SiO ₂ Drying in a vacuum drying oven to obtain GO@SiO ₂ A nanocomposite powder;

(5)GO@SiO ₂ /CaCO ₃ preparation of Dn multiphase composite nano reinforced particles: go@sio of step (4) ₂ Mixing the nano composite powder, caCO3 and Dn according to the proportion of 18:9:1, and then adding the mixture into a ball milling tank for uniform dispersion treatment to prepare GO@SiO ₂ /CaCO ₃ Dn multiphase composite nano-reinforcing particles;

(6) 2wt.% GO@SiO ₂ /CaCO ₃ Preparation of Dn-organosilicon paint: weighing GO@SiO of step (5) ₂ /CaCO ₃ Dn multiphase composite nano reinforced particles are added into the organosilicon base coating; dispersing by high-speed stirring to obtain 2wt.% of GO@SiO ₂ /CaCO ₃ Dn-silicone coating;

(7) Preparation of the sinc2.0 coating: and (3) mixing the step (6) with a silane coupling agent, and spraying on a steel plate by using a high-pressure spray gun to form the multiphase composite reinforced organosilicon nano coating (SiNC2.0), wherein the curing process lasts for 3 days at room temperature.

2. The method for preparing the novel multiphase composite reinforced organosilicon nano-coating according to claim 1, which is characterized in that: in the ultrasonic dispersion treatment, first, the preparation processIn the method, 600mL of ethanol and 300mL of water are measured into a 2L glass measuring cup, so that the accuracy of the volume of the solution is ensured; subsequently, 3.0g GO was taken and poured into a glass measuring cup; in this step, the key is to use an intelligent ultrasonic processor, whose specific parameter settings such as frequency, power and time, are used for 60 minutes of ultrasonic dispersion; this process helps to uniformly disperse the GO particles in the solution; next, concentrated ammonia water is introduced to adjust the pH of the mixed solution to an alkaline environment in a precise amount, thereby creating a solution favorable for SiO ₂ The reaction conditions formed.

3. The method for preparing the novel multiphase composite reinforced organosilicon nano-coating according to claim 1, which is characterized in that: in the hydrolysis reaction, 15.0ml of TEOS solution is firstly taken and gradually added into the GO/ethanol/water mixed solution in the step (1); then, ultrasonic dispersion treatment was performed for 1 hour, followed by magnetic stirring at room temperature for 24 hours; this process ensures SiO ₂ The hydrolysis reaction is fully carried out, thereby forming stable SiO on the surfaces of GO particles ₂ And (3) coating.

4. The method for preparing the novel multiphase composite reinforced organosilicon nano-coating according to claim 1, which is characterized in that: the GO@SiO ₂ Preparation of the suspension: first 0.25g KH-500 is added to 12ml ethanol solution, then the pH is adjusted to an acidic environment by proper addition of acetic acid; subsequently, ultrasonic dispersion treatment was performed for 30 minutes; next, gradually adding the prepared KH-500 coupling agent solution into the previously prepared GO/ethanol/water/TEOS solution; magnetic stirring was carried out for 10 hours to ensure GO and hydrolysed SiO ₂ Fully combine to form GO@SiO ₂ A suspension.

5. The method for preparing the novel multiphase composite reinforced organosilicon nano-coating according to claim 1, which is characterized in that: the GO@SiO ₂ And (3) drying: first, a table-type electric centrifuge is used to prepare GO@SiO ₂ Centrifuging the suspension, and adding deionized water for multiple times to reach neutral pH of the suspension;subsequently, go@sio ₂ Placing the suspension into a vacuum drying oven, and continuously drying for 8 hours under the condition that the temperature is set to 70 ℃; this step ensures that GO@SiO ₂ Solid state form and dry stability of (c).

6. The method for preparing the novel multiphase composite reinforced organosilicon nano-coating according to claim 1, which is characterized in that: the GO@SiO ₂ /CaCO ₃ Preparation of Dn multiphase composite nano reinforced particles: mixing the GO@SiO2 nanocomposite powder prepared previously, caCO3 and Dn according to the ratio of 18:9:1; then, adding the mixture into a ball milling tank for uniform dispersion treatment; this step ensures uniform distribution and interaction of the different components, eventually obtaining GO@SiO ₂ /CaCO ₃ Dn multiphase composite nano-reinforcing particles.

7. The method for preparing the novel multiphase composite reinforced organosilicon nano-coating according to claim 1, which is characterized in that: said 2wt.% GO@SiO ₂ /CaCO ₃ Preparation of Dn-organosilicon paint: 6.0g of GO@SiO are measured out ₂ /CaCO ₃ Dn multiphase composite nano-reinforcing particles and adding them to 294.0g of organosilicon base coating; through high-speed stirring and dispersing, GO@SiO is ensured ₂ /CaCO ₃ the/Dn particles were uniformly dispersed in the silicone coating to form 2wt.% GO@SiO ₂ /CaCO ₃ Dn-silicone coating.

8. The method for preparing the novel multiphase composite reinforced organosilicon nano-coating according to claim 1, which is characterized in that: preparation of the SiNC2.0 coating: mixing the coating prepared in the step (6) with a silane coupling agent according to the proportion of 20:1; spraying the mixed paint on a 304 steel plate through a high-pressure spray gun to form a multiphase composite reinforced organosilicon nano coating (SiNC2.0); in the whole preparation process, the curing process of the coating lasts for 3 days at room temperature, so that the stability and the performance of the coating are ensured.