Rare earth fluorescent powder composite silicone resin temperature control coating, preparation method and application thereof

Abstract

The application discloses a rare earth fluorescent powder composite organic silicon resin temperature control coating and a preparation method and application thereof, belongs to the field of new coating materials, and mixes rare earth fluorescent powder and organic silicon modified resin according to a certain proportion, prepares a composite coating, and coats the composite coating on the surface of a base material to form a temperature control coating; the coating can automatically adjust the light emitting characteristics according to the change of the ambient temperature, and realizes the temperature sensing function. Specifically, the rare earth fluorescent temperature control coating has the characteristic of being sensitive to temperature, can adjust the light emitting intensity, light emitting color or position of the emission spectrum along with the change of the temperature. By changing the temperature, the precise control of the optical performance of the coating can be realized, so that different application requirements can be met.

Description

Technical Field

[0001] This invention relates to the field of new coating materials, and in particular to a rare earth phosphor composite organosilicon resin temperature control coating, its preparation method, and its application. Background Technology

[0002] With the continuous development of temperature control technology and the increasing integration and improvement of heating equipment, the internal components and power density are also constantly increasing. Therefore, the waste heat generated during equipment operation cannot be dissipated in a timely manner, leading to localized overheating, which will seriously affect the operational stability and service life of the equipment. The failure rate of electronic equipment increases sharply with rising operating temperatures. Furthermore, statistics show that for every 10°C increase in ambient temperature, the lifespan of equipment decreases by 50%. Therefore, timely removal of the large amount of waste heat generated during equipment operation is crucial to ensuring equipment reliability and longevity. Meanwhile, the development of remote thermal management indication technology for heating reaction equipment is limited due to high costs and system complexity. There is a need to develop efficient coating technology that integrates heat dissipation and temperature indication. This technology should efficiently release heat from the external environment, ensuring that the internal operating temperature of the equipment remains within a safe and controllable range, and monitor the temperature through temperature indicators on the equipment surface to prevent safety accidents caused by overheating.

[0003] Temperature control in rare-earth phosphor composite coatings is achieved by regulating the properties of the rare-earth phosphors within the coating. Rare-earth phosphors typically exhibit luminescence and temperature sensitivity; temperature changes affect their luminescence characteristics. A common temperature control method utilizes the fact that temperature-sensitive rare-earth phosphors emit different colors of light at different temperatures. By altering the composition and concentration of the rare-earth phosphors in the coating, varying the emitted color within different temperature ranges can be achieved. Another method involves exciting the rare-earth phosphors in the coating using controllable temperature variations. Increased temperature alters the crystal structure of the rare-earth phosphors, thus affecting their energy levels and luminescence characteristics. By controlling the temperature, the luminescence intensity and color of the rare-earth phosphors can be changed. In summary, temperature control in rare-earth phosphor composite coatings is achieved by adjusting the composition and concentration of the rare-earth phosphors and utilizing their temperature sensitivity, thereby controlling the coating's luminescence characteristics.

[0004] Rare-earth ion-based upconversion materials possess the ability to convert low-energy incident light into various high-energy radiations by trapping multiple photons, leading to their widespread application in wastewater purification, medical treatment, optical temperature measurement, and anti-counterfeiting. Compared to other applications, optical temperature control boasts well-known advantages such as fast response speed, remote monitoring in harsh environments, high resolution, and good corrosion resistance. Currently, fluorescence intensity rate technology is widely used to achieve optical temperature control. This technology utilizes the inconsistent temperature response of two emission levels generated by thermal coupling, as it avoids excitation source fluctuations and spectral loss.

[0005] Typically co-doped with Yb3+ As an upconversion luminescent sensitizer, Yb ions have a large absorption cross-sectional area near the wavelength of 980 nm. 3+ 2F5 / 2-2F7 / 2 emission of ions and Er 3+ There is significant spectral overlap between the 4I15 / 2 and 4I11 / 2 absorptions, which can greatly improve Erm. 3+ The ions emit green light. Er is typically selected. 3+ The 2H11 / 2 and 4S3 / 2 energy level pairs are thermally coupled because their fluorescence intensity ratio (FIR) changes with temperature, thus allowing them to be used to detect temperature changes in the environment. Strong upconversion luminescence and good temperature sensing performance are important parameters for achieving accurate temperature measurement.

[0006] Organosilicon resins possess numerous excellent properties such as resistance to high and low temperatures, aging, weathering, and acids and alkalis, attracting increasing attention. The molecular structure of organosilicon resins contains a large number of SiO bonds. Compared to CO, C, and SiC bonds, SiO bonds have strong ionic properties, which can increase bond energy and impart excellent heat resistance to modified resin coatings.

[0007] Currently, some high-temperature heating reaction equipment suffers from slow remote temperature indication, complex temperature control systems, and high costs. There is an urgent need for a coating with a fast response speed and the ability to remotely monitor temperatures in various harsh environments to prevent damage to the equipment and injuries to personnel caused by excessively high temperatures. This invention was developed to address this need. Summary of the Invention

[0008] This summary is provided to introduce, in a simplified form, some concepts that will be further described in the following detailed description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

[0009] This invention addresses the problems of unstable surface temperature control, slow temperature response, complex reaction mechanisms, and high costs in existing heating reaction equipment. It aims to provide a coating to prevent damage to the equipment and injury to personnel caused by excessively high temperatures. To this end, this invention proposes the following technical solution:

[0010] This invention first provides a rare-earth phosphor composite organosilicon resin temperature control coating, characterized in that it comprises the following components in parts by weight:

[0011]

[0012]

[0013] Preferably, it satisfies one or more of the following characteristics:

[0014] The organosilicon oligomer is n-propyl dimethoxymethylsilane maleimide (PM I-HS i);

[0015] The curing agent is a titanate curing agent (PAEs);

[0016] The catalyst is selected from dibutyltin dilaurate (DBTDL) and cumene hydroperoxide (CHP).

[0017] Preferably, the dibutyltin dilaurate (DBTDL) is 0-3 parts and the cumene hydroperoxide (CHP) is 0-9 parts.

[0018] This invention also provides a method for preparing a rare-earth phosphor composite organosilicon resin temperature-controlled coating, characterized by comprising the following steps:

[0019] Preparation of rare earth phosphor: Y₂O₃, TiO₂, Yb₂O₃ and Er₂O₃ are mixed in agate slurry and stirred evenly. A complexing agent is added to form a colloidal gel system. The gel is then impregnated and shaped, and after drying and sintering, it is powdered to obtain Y₂Ti₂O₇: x mol%Yb 3+ y mo l%Er 3+ The rare earth phosphor has an x ​​range of 0.01-0.12 and a y range of 0.005-0.06. Specifically, Y₂TiO₇: x mol%Yb 3+ y mo l%Er 3+ Interpreted as Y2TiO7, Yb 3+ and Er 3+ All based on total moles, x moles % is Yb 3+ Percentage of total molar content; y mol% is Er 3+ The percentage of total molar content.

[0020] Preparation of titanium-silicone resin precursor: The titanium-silicone resin precursor is obtained by mixing organosilicon oligomers, curing agents and catalysts;

[0021] Coating preparation: The rare earth phosphor is mixed with the titanium silicon resin precursor to form an emulsion, which is then sprayed onto the substrate and cured by heat after being cured by moisture in the air.

[0022] Preferably, it satisfies one or more of the following characteristics:

[0023] The complexing agent is ethylene glycol;

[0024] The organosilicon oligomer is n-propyl dimethoxymethylsilane maleimide (PM I-HS i);

[0025] The curing agent is a titanate curing agent (PAEs);

[0026] The catalyst is selected from dibutyltin dilaurate (DBTDL) and cumene hydroperoxide (CHP).

[0027] Preferably, the mass fractions of each component are:

[0028]

[0029]

[0030] Furthermore, the complexing agent is present in a mass fraction of 0-20 parts; preferably 10 parts.

[0031] Preferably, the synthesis of organosilicon oligomers includes: dissolving 32g of maleic anhydride in 200ml of toluene to form solution A; dissolving 3-16.1g of aminopropyldimethoxymethylsilane in toluene to form solution B; adding solution B dropwise to solution A under constant pressure for half an hour; then raising the temperature of the reaction solution to 80℃ and adding 9.69g of acetic anhydride and 7.51g of pyridine dropwise under constant pressure; boiling the reaction solution after reaction to obtain n-propyldimethoxymethylsilane maleimide (MISi); finally, uniformly mixing 21.4g MISi, 40ml of ethanol, and 0.86g of water with tetramethylammonium hydroxide, adjusting the pH at 10.55℃ for 3 hours, removing the solvent under vacuum to obtain a brown viscous liquid, namely n-propyldimethoxymethylsilane maleimide (PMI-HSi);

[0032] Its chemical reaction formula is:

[0033]

[0034] Preferably, the synthesis of titanate curing agents (PAEs) includes: dissolving 14.62 g of tetrabutyl titanate in a solvent to form solution C, dissolving 11.52 g of 2-allylphenol in the solution to form solution D, adding solution D dropwise into solution C under constant pressure to carry out the reaction, and distilling under reduced pressure to obtain a red oily liquid, i.e., titanate curing agents (PAEs);

[0035] Its chemical reaction formula is:

[0036]

[0037] Preferably, solution D is added dropwise to solution C under constant pressure to carry out the reaction. The reaction is first carried out at room temperature for 1 hour, and then the temperature is raised to 80°C and the reaction is carried out under reduced pressure for 4 hours.

[0038] Preferably, the complexing agent is ethylene glycol, and the amount of ethylene glycol is 0-20 parts, preferably 10 parts.

[0039] This invention also provides an application of a rare-earth phosphor composite silicone resin temperature-controlled coating, characterized in that the above-mentioned rare-earth phosphor composite silicone resin temperature-controlled coating is coated onto a substrate for temperature sensing. Temperature is sensed by emitting different colors of light at different temperatures.

[0040] Due to the adoption of the above technical solution, the principle and beneficial effects of this invention are as follows:

[0041] Y₂Ti₂O₇ (containing Yb) with a negative thermal expansion coefficient was prepared by the sol-gel method. 3+ Er 3+ Rare earth phosphors were used. A titanium-modified polyimide-silicone resin coating was prepared through a wet / heat dual-curing process to achieve high-temperature protection. Finally, the rare earth phosphors and organosilicon-modified resin were mixed in a specific ratio to prepare a composite coating, which was then applied to the substrate surface. The rare earth phosphors consisted of Y₂O₃, TiO₂, Yb₂O₃, and Er₂O₃, while the coating film-forming material consisted of bismaleimide-modified organosilicon (PMI-HSi) oligomers and their matching titanium-containing phthalic acid ester curing agents (PAEs). The resulting prepolymer molecular skeleton consisted of aniline bonds, generating strong hydrogen bonds, benzene rings, and titanium atoms, which is beneficial to the stability of the prepared coating under high-temperature conditions. The prepared rare earth phosphors were then uniformly mixed with the resin prepolymer in a specific ratio and coated onto the substrate surface. Finally, thermally initiated free radical polymerization was used to form the final composite coating.

[0042] The beneficial effects of the temperature-controlled coating of the present invention are as follows:

[0043] Temperature Sensing: The temperature-controlled coating can automatically adjust its luminescence characteristics according to changes in ambient temperature, achieving a temperature-sensing function. Specifically, the rare-earth fluorescent temperature-controlled coating is temperature-sensitive, adjusting its luminescence intensity, color, or position in the emission spectrum according to temperature changes. By changing the temperature, precise control of the coating's optical properties can be achieved, thereby meeting different application requirements.

[0044] High stability: With appropriate rare earth phosphor selection and composite coating design, the temperature-controlled coating can maintain high luminescence stability and is not prone to quality degradation during long-term use.

[0045] Precise temperature control: Through a rationally designed temperature-controlled coating structure and temperature control methods, precise temperature control of the composite coating can be achieved, obtaining the expected temperature control effect.

[0046] Reversibility: The rare-earth fluorescent temperature-controlled coating is reversible, meaning its optical properties can be repeatedly altered by increasing or decreasing the temperature. This reversibility allows the temperature-controlled coating to be reused repeatedly, providing high durability and ease of use.

[0047] Multifunctionality: In addition to its temperature-sensitive properties, rare-earth fluorescent temperature-controlled coatings can also possess other functions, such as UV protection, pollution resistance, and corrosion resistance. This multifunctionality allows temperature-controlled coatings to play a wider role in various application fields, such as optical adjustment, optical sensing, and thermal imaging.

[0048] Design flexibility: The luminescent properties of rare-earth fluorescent temperature-controlled coatings can be freely designed by adjusting the types and concentrations of rare-earth elements, as well as the use of other additives. This means that the optical properties of the temperature-controlled coating can be customized to meet specific needs, making it better suited for particular application scenarios.

[0049] In summary, rare-earth fluorescent temperature-controlled coatings possess innovative features such as temperature sensitivity, reversibility, multifunctionality, and flexible design. Through continuous research and innovation, their applications in the field of fluorescent temperature control can be further expanded. Detailed Implementation

[0050] The preferred embodiments described below are merely examples, and other obvious variations will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0051] Preparation of n-propyldimethoxymethylsilane maleimide (PMI-HSi): 32 g of maleic anhydride was dissolved in 200 mL of toluene and added to a 500 mL four-way flask. 3-16.1 g of aminopropyldimethoxymethylsilane was dissolved in 60 mL of toluene and added dropwise to the flask through a constant pressure drop funnel over a period of at least half an hour, and the reaction was allowed to proceed at room temperature for 1 hour. Then, the temperature was raised to 80 °C, and 9.69 g of acetic anhydride and 7.51 g of pyridine were slowly added through a constant pressure drop funnel. The reaction continued for 4 hours, and the product was obtained by boiling to obtain n-propyldimethoxymethylsilane maleimide (MI-Si). Then, 21.4 g of MI-Si, 40 mL of ethanol, and 0.86 g of water were uniformly mixed with tetramethylammonium hydroxide, and the pH was adjusted at 10.55 °C for 3 hours. The solvent was removed under vacuum to obtain a brown viscous liquid, denoted as PM IH is.

[0052] Preparation of titanate curing agents (PAEs): 14.62 g of tetrabutyl titanate was dissolved in 100 mL of toluene and added to a 250 mL three-way flask equipped with mechanical stirring and N2 protection. Then, 11.52 g of 2-allylphenol was dissolved in 30 mL of toluene and added to the flask through a constant pressure drop hopper. The entire reaction was first carried out at 60 °C for 1 h, and then pumped into a reaction flask at 80 °C under reduced pressure for 3 h. The liquid obtained by boiling was a red oily liquid, which was recorded as PAEs.

[0053] Example 1:

[0054] Preparation of rare earth phosphor: A certain amount of 1000 parts Y2O3, 985 parts TiO2, 10 parts Yb2O3 and 5 parts Er2O3 were weighed and mixed in agate slurry and stirred evenly. 10 parts ethylene glycol were added for hydrolysis and complexation to form a colloidal gel system. The gel was then formed by gel impregnation. After the gel was formed, it was dried at 60°C to remove the solvent and water. It was then sintered in air at 850°C for 6 hours. The calcined sample can be further powdered (grinding, sieving, dispersion, etc.) to obtain the desired Y2Ti2O7:0.02mol%Yb 3+ 0.01mol%Er 3+ Fluorescent powder.

[0055] Preparation of titanium silicon resin precursor: 1200 parts of PM I-HSi, 3 parts of dibutyltin dilaurate (DBTDL) and 9 parts of cumene hydroperoxide (CHP) were mixed to obtain titanium silicon resin precursor.

[0056] The prepared rare earth phosphor and the titanium silicon resin precursor are mixed to form an emulsion, which is then sprayed onto the substrate and cured by heat at 80°C after being cured by moisture in the air.

[0057] Example 2:

[0058] Preparation of rare earth phosphor: A certain amount of 1000 parts Y2O3, 970 parts TiO2, 20 parts Yb2O3 and 10 parts Er2O3 were weighed and mixed in agate slurry and stirred evenly. 20 parts ethylene glycol were added for hydrolysis and complexation to form a colloidal gel system. The gel was then formed by gel impregnation. After the gel was formed, it was dried at 60℃ to remove the solvent and water. The gel was then sintered in air at 850℃ for 6 hours. The calcined sample can be further processed (grinding, sieving, dispersion, etc.) to obtain the desired Y2Ti2O7:0.04mol%Yb 3+ 0.02mol%Er 3+ Fluorescent powder.

[0059] Preparation of titanium silicon resin precursor: 1200 parts PM I-HSi, 100 parts titanium ester curing agent (PAEs), 3 parts dibutyltin dilaurate (DBTDL) and 9 parts cumene hydroperoxide (CHP) were mixed to obtain titanium silicon resin precursor.

[0060] The prepared rare earth phosphor and the titanium silicon resin precursor are mixed to form an emulsion, which is then sprayed onto the substrate and cured by heat at 80°C after being cured by moisture in the air.

[0061] Example 3:

[0062] Preparation of rare earth phosphor: A certain amount of 1000 parts Y2O3, 955 parts TiO2, 30 parts Yb2O3, and 15 parts Er2O3 were weighed and mixed in agate slurry and stirred evenly. 15 parts ethylene glycol were added for hydrolysis and complexation to form a colloidal gel system. The gel was then formed by gel impregnation. After the gel was formed, it was dried at 60°C to remove the solvent and water. It was then sintered in air at 850°C for 6 hours. The calcined sample can be further processed (grinding, sieving, dispersion, etc.) to obtain the desired Y2Ti2O7:0.06mol%Yb 3+ 0.03 mol% Er 3+ Fluorescent powder.

[0063] Preparation of titanium silicon resin precursor: 1200 parts PM I-HSi, 300 parts titanium ester curing agent (PAEs), 3 parts dibutyltin dilaurate (DBTDL) and 9 parts cumene hydroperoxide (CHP) were mixed to obtain titanium silicon resin precursor.

[0064] The prepared rare earth phosphor and the titanium silicon resin precursor are mixed to form an emulsion, which is then sprayed onto the substrate and cured by heat at 80°C after being cured by moisture in the air.

[0065] Example 4:

[0066] Preparation of rare earth phosphor: A certain amount of 1000 parts Y2O3, 925 parts TiO2, 40 parts Yb2O3, and 25 parts Er2O3 were weighed and mixed in agate slurry and stirred evenly. 5 parts ethylene glycol were added for hydrolysis and complexation to form a colloidal gel system. The gel was then formed by gel impregnation. After the gel was formed, it was dried at 60℃ to remove the solvent and water. The gel was then sintered in air at 850℃ for 6 hours. The calcined sample can be further processed (grinding, sieving, dispersion, etc.) to obtain the desired Y2Ti2O7:0.08mol%Yb 3+ 0.04mol%Er 3+ Fluorescent powder.

[0067] Preparation of titanium silicon resin precursor: 1200 parts PM I-HSi, 600 parts titanium ester curing agent (PAEs), 3 parts dibutyltin dilaurate (DBTDL) and 9 parts cumene hydroperoxide (CHP) were mixed to obtain titanium silicon resin precursor.

[0068] The prepared rare earth phosphor and the titanium silicon resin precursor are mixed to form an emulsion, which is then sprayed onto the substrate and cured by heat at 80°C after being cured by moisture in the air.

[0069] Example 5:

[0070] Preparation of rare earth phosphor: A certain amount of 1000 parts Y2O3, 915 parts TiO2, 50 parts Yb2O3, and 35 parts Er2O3 were weighed and mixed in agate slurry and stirred evenly. Two parts of ethylene glycol were added for hydrolysis and complexation to form a colloidal gel system. The gel was then formed by gel impregnation. After the gel was formed, it was dried at 60℃ to remove the solvent and water. The gel was then sintered in air at 850℃ for 6 hours. The calcined sample can be further processed (grinding, sieving, dispersion, etc.) to obtain the desired Y2Ti2O7:0.1 mol%Yb 3+ 0.05mol%Er 3+ Fluorescent powder.

[0071] Preparation of titanium silicon resin precursor: 1000 parts PM I-HSi, 900 parts titanium ester curing agent (PAEs), 3 parts dibutyltin dilaurate (DBTDL) and 9 parts cumene hydroperoxide (CHP) were mixed to obtain titanium silicon resin precursor.

[0072] The prepared rare earth phosphor and the titanium silicon resin precursor are mixed to form an emulsion, which is then sprayed onto the substrate and cured by heat at 80°C after being cured by moisture in the air.

[0073] Example 6:

[0074] Preparation of rare earth phosphor: A certain amount of 1000 parts Y₂O₃, 900 parts TiO₂, 60 parts Yb₂O₃, and 40 parts Er₂O₃ were weighed and mixed in agate slurry and stirred evenly. 10 parts of ethylene glycol were added for hydrolysis and complexation to form a colloidal gel system. The gel was then formed by gel impregnation. After the gel was formed, it was dried at 60°C to remove the solvent and water. It was then sintered in air at 850°C for 6 hours. The calcined sample can be further processed into powder (grinding, sieving, dispersion, etc.) to obtain the desired Y₂Ti₂O₇: 0.12 mol%Yb 3+ 0.06mol%Er 3+ Fluorescent powder.

[0075] Preparation of titanium silicon resin precursor: 1200 parts PM I-HSi, 1200 parts titanium ester curing agent (PAEs), 3 parts dibutyltin dilaurate (DBTDL) and 9 parts cumene hydroperoxide (CHP) were mixed to obtain titanium silicon resin precursor.

[0076] The prepared rare earth phosphor and the titanium silicon resin precursor are mixed to form an emulsion, which is then sprayed onto the substrate and cured by heat at 80°C after being cured by moisture in the air.

[0077] The components of Examples 1-6 described above are statistically analyzed as shown in the table below:

[0078]

[0079] Material properties were tested for Examples 1 to 6 above, and the following performance tests were conducted according to GB / T 7714-2005, GB / T14536.1 and ASTM D2485.

[0080] The performance test results are shown in the table below:

[0081]

[0082]

[0083] The embodiments described in the preceding paragraphs may be combined with one or more of the specifically described alternatives. In particular, the claimed embodiments may contain references to more than one other embodiment. The claimed embodiments may specify further limitations on the claimed subject matter.

[0084] As can be seen from the foregoing, the present invention is well suited to achieving all the aforementioned objects and objectives, as well as other obvious and inherent advantages of the structure. It should be understood that certain features and sub-combinations are useful and can be used without reference to other features and sub-combinations. This is within the scope of the present invention.

[0085] Various aspects of the illustrative embodiments have been described using terminology commonly used by those skilled in the art to convey the essence of the work to others skilled in the art. However, it will be apparent to those skilled in the art that alternative embodiments can be implemented using only some of the described aspects. Specific figures, materials, and configurations are set forth for illustrative purposes to provide a thorough understanding of the illustrative embodiments. However, it will be apparent to those skilled in the art that alternative embodiments can be implemented without specific details. In other instances, well-known features have been omitted or simplified so as not to obscure the illustrative embodiments.

[0086] The phrase "in one embodiment" or "in an embodiment" is used repeatedly. This phrase does not usually refer to the same embodiment; however, it may refer to the same embodiment. The terms "comprising," "having," and "including" are synonymous unless the context otherwise specifies. The phrase "A / B" means "A or B." The phrase "A and / or B" means "(A), (B), or (A and B)." The phrase "at least one of A, B, and C" means "(A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C)."

Claims

1. A rare earth phosphor composite organosilicon resin temperature control coating, characterized in that, The components include the following parts by weight: The organosilicon oligomer is n-propyl dimethoxymethylsilane maleimide, and the curing agent is a titanate curing agent. The synthesis of the organosilicon oligomer includes: dissolving 32g of maleic anhydride in 200ml of toluene to form solution A; dissolving 3-16.1g of aminopropyl dimethoxymethylsilane in toluene to form solution B; adding solution B dropwise to solution A under constant pressure for half an hour; then raising the temperature of the reaction solution to 80℃ and adding 9.69g of acetic anhydride and 7.51g of pyridine dropwise under constant pressure; after the reaction, boiling is used to obtain n-propyl dimethoxymethylsilane maleimide (MI-Si); finally, 21.4g of MI-Si, 40ml of ethanol, and 0.86g of water are uniformly mixed with tetramethylammonium hydroxide, and the pH is adjusted at 10.55℃ for 3 hours. The solvent is removed under vacuum to obtain a brown viscous liquid, i.e., n-propyl dimethoxymethylsilane maleimide. 1-Propyl dimethoxymethylsilane maleimide (PMI-HSi); The synthesis of titanate curing agents (PAEs) includes: dissolving 14.62 g of tetrabutyl titanate in a solvent to form solution C, dissolving 11.52 g of 2-allylphenol in the solution to form solution D, adding solution D dropwise into solution C under constant pressure to carry out the reaction, and distilling under reduced pressure to obtain a red oily liquid, i.e., titanate curing agents (PAEs).

2. The rare earth phosphor composite organosilicon resin temperature control coating according to claim 1, characterized in that, The catalyst is selected from dibutyltin dilaurate and cumene hydroperoxide.

3. The rare earth phosphor composite organosilicon resin temperature control coating according to claim 2, characterized in that, The dibutyltin dilaurate is 0-3 parts, and the cumene hydroperoxide is 0-9 parts.

4. A method for preparing a rare earth phosphor composite organosilicon resin temperature-controlled coating as described in claim 1, characterized in that, include: Preparation of rare earth phosphor: Y2O3, TiO2, Yb2O3 and Er2O3 were mixed in agate slurry and stirred evenly. A complexing agent was added to form a colloidal gel system. The gel was then impregnated and shaped, and after drying and sintering, it was powdered to obtain Y2Ti2O7: xmol% Yb 3+ y mol% Er 3+ The rare earth phosphor has an x ​​range of 0.01-0.12 and a y range of 0.005-0.

06. Preparation of titanium-silicone resin precursor: The titanium-silicone resin precursor is obtained by mixing organosilicon oligomers, curing agents and catalysts; Coating preparation: The rare earth phosphor is mixed with the titanium silicon resin precursor to form an emulsion, which is then sprayed onto the substrate and cured by heat after being cured by moisture in the air.

5. The preparation method according to claim 4, characterized in that, It meets one or more of the following characteristics: The complexing agent is ethylene glycol; The catalyst is selected from dibutyltin dilaurate and cumene hydroperoxide.

6. The preparation method according to claim 4, characterized in that, The complexing agent has a mass fraction of 0-20 parts.

7. The preparation method according to claim 5, characterized in that, In the synthesis reaction of titanate curing agent, the reaction is first carried out at room temperature for 1 hour, and then the temperature is raised to 80℃ and the reaction is carried out under reduced pressure for 4 hours.

8. The application of rare earth phosphor composite organosilicon resin temperature control coating, characterized in that, The rare earth phosphor composite organosilicon resin temperature control coating according to any one of claims 1 to 3 is applied to the substrate for temperature sensing of the substrate.

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