Microcapsule phase change cooling fluid and method of making same

Abstract

The present application relates to a kind of microcapsule phase change cooling fluid and its preparation method, belong to polymer material technical field.The microcapsule phase change cooling fluid includes by weight parts: ethylene glycol 40-55 parts, deionized water 30-45 parts, core material 5-14 parts, wall material 3-6 parts, dispersion stabilizer 0.1-0.4 parts, corrosion inhibitor 0.1-0.4 parts, modified antirust agent 0.1-0.4 parts;The microcapsule phase change cooling fluid prepared by the present application not only has good cooling effect, but also has excellent antirust and flame retardant effect.

Description

Technical Field

[0001] This invention belongs to the field of polymer materials technology, specifically relating to a microcapsule phase change coolant and its preparation method. Background Technology

[0002] In recent years, with the rapid development of the electronics and semiconductor industries, the trend of highly integrated electronic components has become obvious. In order to solve the problem of heat dissipation of high-power electronic components in a small space in terms of time and space, phase change coolant can absorb or release energy from the outside in the form of latent heat through phase change. However, phase change coolant often flows during the phase change process. "Microencapsulation" of it has shown good application prospects in fields such as building energy conservation and temperature-controlled clothing, expanding the application fields of phase change materials.

[0003] However, ordinary microcapsule phase change coolants are susceptible to rust during use, which affects their service life and limits their application range. In addition, although ordinary microcapsule phase change coolants have a certain degree of flame retardancy, their flame retardancy is no longer sufficient to meet current needs as practical application requirements continue to increase. Therefore, the development of microcapsule phase change coolants with superior performance has important practical significance and application value. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a microcapsule phase change coolant and its preparation method.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A microcapsule phase change coolant and its preparation method, comprising the following raw materials in parts by weight: 40-55 parts ethylene glycol, 30-45 parts deionized water, 5-14 parts core material, 3-6 parts wall material, 0.1-0.4 parts dispersant stabilizer, 0.1-0.4 parts corrosion inhibitor, and 0.1-0.4 parts modified rust inhibitor;

[0007] The core material is paraffin wax;

[0008] The wall material is polymethyl methacrylate;

[0009] The dispersion stabilizer is polyvinyl alcohol;

[0010] The corrosion inhibitor is benzotriazole.

[0011] The modified rust inhibitor is prepared by the following method:

[0012] Step A1: Nano-silica was activated at 120℃ for 2.5h, then 3-(2,3-epoxypropoxy)propyltrimethoxysilane, anhydrous ethanol and deionized water were added and mixed. After ultrasonic dispersion for 10min, mechanical stirring was performed for 20min. The pH of the system was adjusted to 5, and the reaction was carried out at 70℃ for 6h. After the reaction was completed, the mixture was centrifuged, filtered, and dried at 60℃ for 24h to obtain modified silica.

[0013] Furthermore, the ratio of nano-silica, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, anhydrous ethanol, and deionized water is 0.01-0.04 mol: 0.01-0.04 mol: 10-30 mL: 5-10 mL;

[0014] Step A2: Mix alanine and o-xylene evenly, heat to 90°C, slowly add tetraethylenepentamine, heat to 150°C, react for 4 hours, then heat to 190°C and react for 4 hours to obtain the intermediate product.

[0015] Furthermore, the ratio of alanine, o-xylene, and tetraethylenepentamine is 0.02-0.08 mol: 50 mL: 0.01-0.04 mol;

[0016] Step A3: Mix the intermediate product, 6-chloro-1-hexene and methanol, reflux for 12 h, cool to room temperature, add tetrahydrofuran and mix, centrifuge at 4000 r / min for 3 min, cool to room temperature again, add 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and N,N-dimethylformamide and mix, stir at 145 °C for 9 h, filter, wash, and vacuum dry at 60 °C for 24 h to obtain the preproduct;

[0017] Furthermore, the ratio of the intermediate product, 6-chloro-1-hexene, methanol, tetrahydrofuran, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and N,N-dimethylformamide is 0.01-0.04 mol: 0.02-0.08 mol: 5-10 mL: 5-10 mL: 0.02-0.08 mol: 180-200 mL;

[0018] Step A4: Mix the preproduct, ethanol and modified silica evenly, stir at high speed for 15 min, react at 70℃ for 1 h, then sonicate for 30 min, filter, wash and dry to obtain the modified rust inhibitor.

[0019] Furthermore, the ratio of preproduct, ethanol, and modified silica is 0.01-0.04 mol: 20-30 mL: 0.02-0.08 mol.

[0020] A method for preparing a microcapsule phase change coolant specifically includes the following steps:

[0021] S1. Mix ethylene glycol with deionized water and stir at 450-550 r / min for 1-2 h to obtain the cooling base liquid;

[0022] S2. Mix the core material, wall material and cooling base liquid, stir at 550-650 r / min for 20-40 min, and then ultrasonically disperse for 10-20 min to obtain a phase change microcapsule suspension;

[0023] S3. Mix the phase change microcapsule suspension, dispersant stabilizer, corrosion inhibitor and modified rust inhibitor evenly, stir at 250-350 r / min for 200-350 min, adjust the pH of the system to 9-11, and then stir at 180-220 r / min for 30-60 min to obtain the microcapsule phase change coolant.

[0024] The beneficial effects of this invention are:

[0025] The microcapsule phase change coolant of the present invention has a good cooling effect, and at the same time, it also has excellent rust prevention and flame retardant effects, further extending its service life.

[0026] The modified rust inhibitor prepared in this invention is first modified with 3-(2,3-epoxypropoxy)propyltrimethoxysilane to obtain modified silica; then, the carboxyl group of alanine and the aminoamidation reaction of tetraethylenepentamine are used to cyclize the silica to obtain an intermediate containing bisimidazoline; then, the chlorine atom of 6-chloro-1-hexene reacts with the intermediate to undergo a quaternization reaction, and the carbon-carbon double bond of 6-chloro-1-hexene reacts with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to generate a preproduct; finally, the amino group of the preproduct reacts with the epoxy group of the modified silica to obtain the modified rust inhibitor. The intermediate containing bisimidazoline exhibits a five-membered nitrogen-containing heterocycle that is tightly adsorbed onto the metal surface via electrostatic attraction and large π bonds, forming a dense protective film that effectively isolates the aqueous corrosive medium and significantly reduces the corrosion rate. Furthermore, the pre-product generated after the nitrogen atom quaternization effectively inhibits the anodic reaction by combining with the negative charge on the metal surface through positive charge binding, while simultaneously covering the active sites on the metal surface, further enhancing the isolation effect and suppressing the electron transfer process of the corrosion reaction, thus significantly reducing the corrosion rate. Secondly, nano-silica possesses extremely high specific surface area and surface energy, enabling it to form a uniformly dispersed system with phase change materials. The pores of the nanoparticles act as thermal conduction bridges, reducing heat transfer. The heat transfer resistance is significantly reduced, improving the thermal response speed of the coolant and thus enhancing the overall heat transfer efficiency. Furthermore, encapsulating bis(imidazoline) in microcapsules significantly improves its slow-release rust-preventive properties. The microcapsules, by controlling the release rate, ensure that the metal surface is always covered with a protective film, extending the coolant's service life, achieving long-lasting rust prevention, and reducing replacement frequency. In addition, the phosphorus-nitrogen flame retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, as a highly thermally stable phosphaphenanthrene compound, promotes the formation of a dense and continuous char layer during combustion, effectively isolating oxygen, blocking heat and combustible gas exchange, and synergistically retardant with the phosphorus-oxygen double bond, extending its service life. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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] Example 1: A method for preparing a microcapsule phase change coolant, specifically including the following steps:

[0029] S1. Weigh the raw materials according to the following weight parts: 40 parts ethylene glycol, 30 parts deionized water, 5 parts core material, 3 parts wall material, 0.1 parts dispersant stabilizer, 0.1 parts corrosion inhibitor, and 0.1 parts modified rust inhibitor (prepared in this embodiment); mix ethylene glycol and deionized water, stir at 450 r / min for 1 h to obtain the cooling base liquid;

[0030] S2. Mix paraffin, polymethyl methacrylate and cooling base liquid, stir at 550 r / min for 20 min, and then ultrasonically disperse for 10 min to obtain phase change microcapsule suspension;

[0031] S3. Mix the phase change microcapsule suspension, polyvinyl alcohol, benzotriazole and modified rust inhibitor evenly, stir at 250 r / min for 200 min, adjust the pH of the system to 9, and then stir at 180 r / min for 30 min to obtain the microcapsule phase change coolant.

[0032] The modified rust inhibitor is prepared by the following method:

[0033] Step A1: 0.01 mol of nano silica was activated at 120℃ for 2.5 h, then 0.01 mol of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 10 mL of anhydrous ethanol and 5 mL of deionized water were added and mixed. After ultrasonic dispersion for 10 min, mechanical stirring was performed for 20 min. The pH of the system was adjusted to 5 and the reaction was carried out at 70℃ for 6 h. After the reaction was completed, the mixture was centrifuged, filtered and dried at 60℃ for 24 h to obtain modified silica.

[0034] Step A2: Mix 0.02 mol alanine and 50 mL o-xylene evenly, heat to 90°C, then slowly add 0.01 mol tetraethylenepentamine, heat to 150°C, react for 4 h, then heat to 190°C, react for 4 h to obtain the intermediate product.

[0035] Step A3: Mix 0.01 mol of intermediate product, 0.02 mol of 6-chloro-1-hexene and 5 mL of methanol, reflux for 12 h, cool to room temperature, add 5 mL of tetrahydrofuran and mix, centrifuge at 4000 r / min for 3 min, cool to room temperature again, add 0.02 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 180 mL of N,N-dimethylformamide and mix, stir at 145 °C for 9 h, filter, wash, and vacuum dry at 60 °C for 24 h to obtain the preproduct;

[0036] Step A4: Mix 0.01 mol of preproduct, 20 mL of ethanol and 0.02 mol of modified silica evenly, stir at high speed for 15 min, react at 70 °C for 1 h, then sonicate for 30 min, filter, wash and dry to obtain modified rust inhibitor.

[0037] Example 2: A method for preparing a microcapsule phase change coolant, specifically including the following steps:

[0038] S1. Weigh the raw materials according to the following weight parts: 45 parts ethylene glycol, 35 parts deionized water, 8 parts core material, 4 parts wall material, 0.2 parts dispersant stabilizer, 0.2 parts corrosion inhibitor, and 0.2 parts modified rust inhibitor (prepared in this embodiment); mix ethylene glycol and deionized water, and stir at 480 r / min for 1.3 h to obtain the cooling base liquid;

[0039] S2. Mix paraffin, polymethyl methacrylate and cooling base liquid, stir at 580 r / min for 27 min, and then ultrasonically disperse for 13 min to obtain phase change microcapsule suspension;

[0040] S3. Mix the phase change microcapsule suspension, polyvinyl alcohol, benzotriazole and modified rust inhibitor evenly, stir at 280 r / min for 250 min, adjust the pH of the system to 10, and then stir at 200 r / min for 40 min to obtain the microcapsule phase change coolant.

[0041] The modified rust inhibitor is prepared by the following method:

[0042] Step A1: 0.02 mol of nano silica was activated at 120℃ for 2.5 h, then 0.02 mol of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 17 mL of anhydrous ethanol and 7 mL of deionized water were added and mixed. After ultrasonic dispersion for 10 min, mechanical stirring was performed for 20 min. The pH of the system was adjusted to 5 and the reaction was carried out at 70℃ for 6 h. After the reaction was completed, the mixture was centrifuged, filtered and dried at 60℃ for 24 h to obtain modified silica.

[0043] Step A2: Mix 0.04 mol alanine and 50 mL o-xylene evenly, heat to 90°C, then slowly add 0.02 mol tetraethylenepentamine, heat to 150°C, react for 4 h, then heat to 190°C, react for 4 h to obtain the intermediate product.

[0044] Step A3: Mix 0.02 mol of intermediate product, 0.04 mol of 6-chloro-1-hexene and 7 mL of methanol, reflux for 12 h, cool to room temperature, add 7 mL of tetrahydrofuran and mix, centrifuge at 4000 r / min for 3 min, cool to room temperature again, add 0.04 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 187 mL of N,N-dimethylformamide and mix, stir at 145 °C for 9 h, filter, wash, and vacuum dry at 60 °C for 24 h to obtain the preproduct;

[0045] Step A4: Mix 0.02 mol of preproduct, 23 mL of ethanol and 0.04 mol of modified silica evenly, stir at high speed for 15 min, react at 70 °C for 1 h, then sonicate for 30 min, filter, wash and dry to obtain modified rust inhibitor.

[0046] Example 3: A method for preparing a microcapsule phase change coolant, specifically including the following steps:

[0047] S1. Weigh the raw materials according to the following weight parts: 50 parts ethylene glycol, 40 parts deionized water, 11 parts core material, 5 parts wall material, 0.3 parts dispersant stabilizer, 0.3 parts corrosion inhibitor, and 0.3 parts modified rust inhibitor (prepared in this embodiment); mix ethylene glycol and deionized water, stir at 510 r / min for 1.6 h to obtain the cooling base liquid;

[0048] S2. Mix paraffin, polymethyl methacrylate and cooling base liquid, stir at 610 r / min for 34 min, and then ultrasonically disperse for 16 min to obtain phase change microcapsule suspension;

[0049] S3. Mix the phase change microcapsule suspension, polyvinyl alcohol, benzotriazole and modified rust inhibitor evenly, stir at 310 r / min for 300 min, adjust the pH of the system to 10, and then stir at 200 r / min for 50 min to obtain the microcapsule phase change coolant.

[0050] The modified rust inhibitor is prepared by the following method:

[0051] Step A1: 0.03 mol of nano silica was activated at 120℃ for 2.5 h, then 0.03 mol of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 24 mL of anhydrous ethanol and 9 mL of deionized water were added and mixed. After ultrasonic dispersion for 10 min, mechanical stirring was performed for 20 min. The pH of the system was adjusted to 5 and the reaction was carried out at 70℃ for 6 h. After the reaction was completed, the mixture was centrifuged, filtered and dried at 60℃ for 24 h to obtain modified silica.

[0052] Step A2: Mix 0.06 mol alanine and 50 mL o-xylene evenly, heat to 90°C, then slowly add 0.03 mol tetraethylenepentamine, heat to 150°C, react for 4 h, then heat to 190°C, react for 4 h to obtain the intermediate product.

[0053] Step A3: Mix 0.03 mol of intermediate product, 0.06 mol of 6-chloro-1-hexene and 9 mL of methanol, reflux for 12 h, cool to room temperature, add 9 mL of tetrahydrofuran and mix, centrifuge at 4000 r / min for 3 min, cool to room temperature again, add 0.06 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 194 mL of N,N-dimethylformamide and mix, stir at 145 °C for 9 h, filter, wash, and vacuum dry at 60 °C for 24 h to obtain the preproduct;

[0054] Step A4: Mix 0.03 mol of preproduct, 26 mL of ethanol and 0.06 mol of modified silica evenly, stir at high speed for 15 min, react at 70 °C for 1 h, then sonicate for 30 min, filter, wash and dry to obtain modified rust inhibitor.

[0055] Example 4: A method for preparing a microcapsule phase change coolant, specifically including the following steps:

[0056] S1. Weigh the raw materials according to the following weight parts: 55 parts ethylene glycol, 45 parts deionized water, 14 parts core material, 6 parts wall material, 0.4 parts dispersant stabilizer, 0.4 parts corrosion inhibitor, and 0.4 parts modified rust inhibitor (prepared in this embodiment); mix ethylene glycol and deionized water, stir at 550 r / min for 2 h to obtain the cooling base liquid;

[0057] S2. Mix paraffin, polymethyl methacrylate and cooling base liquid, stir at 650 r / min for 40 min, and then ultrasonically disperse for 20 min to obtain phase change microcapsule suspension;

[0058] S3. Mix the phase change microcapsule suspension, polyvinyl alcohol, benzotriazole and modified rust inhibitor evenly, stir at 350 r / min for 350 min, adjust the pH of the system to 11, and then stir at 220 r / min for 60 min to obtain the microcapsule phase change coolant.

[0059] The modified rust inhibitor is prepared by the following method:

[0060] Step A1: 0.04 mol of nano-silica was activated at 120℃ for 2.5 h, and then 0.04 mol of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 30 mL of anhydrous ethanol and 10 mL of deionized water were added and mixed. After ultrasonic dispersion for 10 min, mechanical stirring was performed for 20 min. The pH of the system was adjusted to 5, and the reaction was carried out at 70℃ for 6 h. After the reaction was completed, the mixture was centrifuged, filtered, and dried at 60℃ for 24 h to obtain modified silica.

[0061] Step A2: Mix 0.08 mol alanine and 50 mL o-xylene evenly, heat to 90°C, then slowly add 0.04 mol tetraethylenepentamine, heat to 150°C, react for 4 h, then heat to 190°C, react for 4 h to obtain the intermediate product.

[0062] Step A3: Mix 0.04 mol of intermediate product, 0.08 mol of 6-chloro-1-hexene and 10 mL of methanol, reflux for 12 h, cool to room temperature, add 10 mL of tetrahydrofuran and mix, centrifuge at 4000 r / min for 3 min, cool to room temperature again, add 0.08 mol of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and 200 mL of N,N-dimethylformamide and mix, stir at 145 °C for 9 h, filter, wash, and vacuum dry at 60 °C for 24 h to obtain the preproduct;

[0063] Step A4: Mix 0.04 mol of preproduct, 30 mL of ethanol and 0.08 mol of modified silica evenly, stir at high speed for 15 min, react at 70 °C for 1 h, then sonicate for 30 min, filter, wash and dry to obtain modified rust inhibitor.

[0064] Comparative Example 1: This comparative example is a microcapsule phase change coolant. The difference between this example and Example 3 is that an equal amount of sodium methylsilicate is used instead of the modified rust inhibitor prepared in Example 3. All other aspects are the same.

[0065] Comparative Example 2: This comparative example is a microcapsule phase change coolant. The difference between this example and Example 3 is that the modified rust inhibitor does not contain modified nano-silica, but all other aspects are the same.

[0066] Performance Testing: The microcapsule phase change coolants prepared in Examples 1-4 and the comparative example were made into standard test sizes. A 28W heat source was used to heat the microcapsule phase change coolants, and the time to reach thermal equilibrium was measured using thermocouples. A salt spray test was conducted, in which iron sheets coated with the microcapsule phase change coolant were placed in a salt spray chamber. The test conditions were set as follows: temperature 35℃, relative humidity 95%, sodium oxide solution concentration 5%, and continuous spraying for 48 hours. The rusting condition on the surface of the test piece was observed. An oil bath fire test was also conducted using 10×10×5cm iron sheets. 3 An oil bath was used as the combustion container, and 5 mL of n-heptane was used as the igniter. The combustion phenomenon of the oil was observed. The test results are shown in Table 1 below:

[0067] Table 1

[0068]

[0069] As can be seen from the test data in Table 1, the microcapsule phase change coolant prepared by the present invention has a good cooling effect. Table 1 also shows that the microcapsule phase change coolant prepared by the present invention has excellent rust prevention and flame retardant effects, and extends service life.

[0070] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a microcapsule phase change coolant, characterized in that, Specifically, the following steps are included: S1. Weigh the raw materials according to the weight parts, mix 40-55 parts of ethylene glycol with 30-45 parts of deionized water and stir to prepare the cooling base liquid; S2. Mix 5-14 parts of core material, 3-6 parts of wall material and cooling base liquid, stir and then ultrasonically disperse to obtain phase change microcapsule suspension; S3. Mix the phase change microcapsule suspension, 0.1-0.4 parts of dispersant stabilizer, 0.1-0.4 parts of corrosion inhibitor and 0.1-0.4 parts of modified rust inhibitor evenly and stir. Adjust the pH of the system to 9-11 and stir again to obtain microcapsule phase change coolant. The modified rust inhibitor is prepared by reacting the amino group of the preproduct with the epoxy group of the modified silica. The preproduct is prepared by first quaternizing 6-chloro-1-hexene and an intermediate product, and then reacting it with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide. The intermediate product is prepared by reacting the carboxyl group of alanine with the amino group of tetraethylenepentamine. The modified silica is prepared by modifying nano-silica with 3-(2,3-epoxypropoxy)propyltrimethoxysilane. The modified rust inhibitor is prepared by the following method: Step A1: Nano-silica was activated at 120℃ for 2.5h, then 3-(2,3-epoxypropoxy)propyltrimethoxysilane, anhydrous ethanol and deionized water were added and mixed. After ultrasonic dispersion for 10min, mechanical stirring was performed for 20min. The pH of the system was adjusted to 5, and the reaction was carried out at 70℃ for 6h. After the reaction was completed, the mixture was centrifuged, filtered, and dried at 60℃ for 24h to obtain modified silica. Step A2: Mix alanine and o-xylene evenly, heat to 90°C, slowly add tetraethylenepentamine, heat to 150°C, react for 4 hours, then heat to 190°C and react for 4 hours to obtain the intermediate product. Step A3: Mix the intermediate product, 6-chloro-1-hexene and methanol, reflux for 12 h, cool to room temperature, add tetrahydrofuran and mix, centrifuge at 4000 r / min for 3 min, cool to room temperature again, add 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and N,N-dimethylformamide and mix, stir at 145 °C for 9 h, filter, wash, and vacuum dry at 60 °C for 24 h to obtain the preproduct; Step A4: Mix the preproduct, ethanol and modified silica evenly, stir at high speed for 15 min, react at 70℃ for 1 h, then sonicate for 30 min, filter, wash and dry to obtain the modified rust inhibitor.

2. The method for preparing a microcapsule phase change coolant according to claim 1, characterized in that, In step S1, the stirring speed is 450-550 r / min and the stirring time is 1-2 h; in step S2, the stirring speed is 550-650 r / min and the stirring time is 20-40 min, and the ultrasonic time is 10-20 min.

3. The method for preparing a microcapsule phase change coolant according to claim 1, characterized in that, In step S3, the stirring speed is 250-350 r / min, the stirring time is 200-350 min, and the stirring speed is 180-220 r / min for 30-60 min.

4. The method for preparing a microcapsule phase change coolant according to claim 1, characterized in that, In step A1, the ratio of nano-silica, 3-(2,3-epoxypropoxy)propyltrimethoxysilane, anhydrous ethanol, and deionized water is 0.01-0.04 mol: 0.01-0.04 mol: 10-30 mL: 5-10 mL.

5. The method for preparing a microcapsule phase change coolant according to claim 1, characterized in that, In step A2, the ratio of alanine, o-xylene, and tetraethylenepentamine is 0.02-0.08 mol: 50 mL: 0.01-0.04 mol.

6. The method for preparing a microcapsule phase change coolant according to claim 1, characterized in that, The ratio of the intermediate product, 6-chloro-1-hexene, methanol, tetrahydrofuran, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, and N,N-dimethylformamide in step A3 is 0.01-0.04 mol : 0.02-0.08 mol : 5-10 mL : 5-10 mL : 0.02-0.08 mol : 180-200 mL.

7. The method for preparing a microcapsule phase change coolant according to claim 1, characterized in that, In step A4, the ratio of preproduct, ethanol, and modified silica is 0.01-0.04 mol: 20-30 mL: 0.02-0.08 mol.

8. The method for preparing a microcapsule phase change coolant according to claim 1, characterized in that, The core material is paraffin wax, the wall material is polymethyl methacrylate, the dispersant and stabilizer is polyvinyl alcohol, and the corrosion inhibitor is benzotriazole.

9. A microcapsule phase change coolant, characterized in that, Prepared by the preparation method according to any one of claims 1-8.

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