Organic silicon cooling liquid and preparation method thereof
By preparing an organosilicon coolant, a mixture of alkyl-modified silicone oil and polyether-modified silicone oil is used to form a protective film with phosphate ester groups, which solves the corrosion and precipitation problems of existing coolants in high temperature and high humidity environments and improves the wettability and corrosion resistance of the coolant.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG NOVEA NEW MATERIALS CO LTD
- Filing Date
- 2026-02-04
- Publication Date
- 2026-05-12
AI Technical Summary
Existing immersion coolants are prone to oxidation or decomposition in high temperature and high humidity environments, leading to decreased insulation performance, corrosion of metal components, and poor material compatibility, which affects the sealing and service life of the cooling system. In addition, polysiloxane coolants are prone to precipitation, affecting heat dissipation.
An organosilicon coolant was prepared by reacting hydrogen-containing siloxanes, alkyl olefins, and a platinum catalyst to generate alkyl-modified silicone oil, which was then mixed with polyether-modified silicone oil, antioxidants, and defoamers. Corrosion inhibitors and nano-alumina were added to form a modifier, which was then reacted with hydrogen-containing siloxanes to generate the organosilicon coolant. The polyether-modified silicone oil improved the wetting ability, and the phosphate ester groups formed a protective film to block metal corrosion.
It achieves good thermal stability and lubricity, improves the wettability of coolant on polar surfaces, inhibits metal corrosion, prevents the aggregation of precipitated particles, and maintains the heat dissipation and mechanical properties of coolant.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of coolant technology, specifically relating to an organosilicon coolant and its preparation method. Background Technology
[0002] With the rapid development of information technology, the computing power of servers is constantly improving, and their power density is also increasing significantly, resulting in a large amount of heat being generated during server operation. Immersion liquid cooling technology, as a highly efficient heat dissipation method, can use coolant to absorb the heat generated by the server, thereby achieving efficient heat dissipation.
[0003] Currently, the main types of immersion coolants on the market are hydrocarbon-based, fluorocarbon-based, and polysiloxane-based. Hydrocarbon-based coolants possess a certain degree of chemical and thermal stability, but their insulation properties are relatively weak. Under high temperature and humidity environments, they are prone to oxidation or decomposition. Furthermore, the impurities they contain can corrode metal components, potentially damaging internal server components with prolonged use. In addition, hydrocarbon-based coolants have poor compatibility with some polymer materials, easily leading to material swelling and softening, affecting the sealing and lifespan of the cooling system. While fluorocarbon-based coolants possess excellent insulation and chemical inertness, they pose certain environmental hazards and do not align with the trend of green and environmentally friendly development.
[0004] Polysiloxane coolants, with polydimethylsiloxane as a typical example, have emerged as a new choice for coolants. In terms of material compatibility, they exhibit good compatibility with non-silicone components in data center equipment, avoiding material damage caused by chemical incompatibility. They also possess high stability and strong resistance to degradation, maintaining stable performance over long-term use and in complex environments, effectively reducing maintenance costs and replacement frequency. However, polysiloxane coolants also have certain limitations. They are prone to causing swelling of silicone rubber materials, thus affecting their mechanical and sealing properties. Furthermore, while polysiloxane coolants have some corrosion inhibition effects, they are unstable during operation and tend to precipitate and adhere to the inside of the heat sink, reducing heat dissipation efficiency.
[0005] Based on this, the present invention provides a method for preparing an organosilicon coolant. Summary of the Invention
[0006] The purpose of this invention is to provide an organosilicon coolant and its preparation method, so as to solve the problems mentioned in the background art.
[0007] The objective of this invention can be achieved through the following technical solutions:
[0008] A method for preparing an organosilicon coolant includes the following steps:
[0009] Step 1: Under nitrogen protection, hydrogen-containing siloxane, alkyl olefin and platinum catalyst are added to a three-necked flask, a condenser and thermometer are installed, magnetic stirring is turned on, and the reaction is carried out at 70-80℃ for 3-5 hours to obtain component A alkyl modified silicone oil.
[0010] The second step involves adding component A (alkyl-modified silicone oil), component B (polyether-modified silicone oil), antioxidant, and defoamer to a mixer and mixing them thoroughly. The mixture is then allowed to stand and mature before being filtered to remove impurities, resulting in an organosilicon coolant.
[0011] Furthermore, the polyether-modified silicone oil of component B has a polyether, a phosphate ester structure, and polymerizable double bonds.
[0012] Furthermore, the component B, the polyether-modified silicone oil, is prepared by the following steps:
[0013] S1. Add amino olefin, dichloroalkanes, sodium bicarbonate and ethanol to a three-necked flask, attach a condenser and a thermometer, turn on magnetic stirring, and react at 70-80℃ for 40-50 min. After the reaction is completed, cool to room temperature and remove the solvent by rotary evaporation. Then extract with ethyl acetate and retain the organic phase. Wash the organic phase with water and dry to obtain the corrosion inhibitor precursor.
[0014] S2. Add the corrosion inhibitor precursor, dialkyl phosphite, iodine and toluene to a three-necked flask, attach a condenser and thermometer, turn on magnetic stirring, and react at 30-40℃ for 30-40 min. After the reaction is completed and cooled to room temperature, remove the solvent by rotary evaporation, extract with ethyl acetate and retain the organic phase, then wash the organic phase with saturated brine and dry to obtain the corrosion inhibitor.
[0015] S3. Add the corrosion inhibitor, nano alumina and xylene to a three-necked flask, attach a condenser and a thermometer, turn on the magnetic stirrer, and react at 70-80℃ for 6-8 hours. After the reaction is complete, filter the product to remove the solid and obtain the modifier.
[0016] S4. Under nitrogen protection, add hydrogen-containing siloxane, modifier, allyl-terminated polyether and platinum catalyst to a three-necked flask, attach a condenser and thermometer, turn on magnetic stirring, and react at 70-80℃ for 3-5 hours to obtain component B polyether modified silicone oil.
[0017] Furthermore, the structural formula of the alkyl olefin in the first step is as follows: , where n is a natural number and satisfies 2≤n≤14.
[0018] Furthermore, the mass ratio of hydrogen-containing siloxane, alkyl olefin, and platinum catalyst in the first step is 400–600: 200–300: 0.1–0.3.
[0019] Furthermore, the antioxidant is at least one of antioxidant 1010, antioxidant 1076 and antioxidant 1035.
[0020] Furthermore, in the second step, the mass ratio of component B (polyether-modified silicone oil), component A (alkyl-modified silicone oil), antioxidant, and defoamer is 25–150: 350–475: 9–11: 5–6.
[0021] Further, the alkyl-modified silicone oil component A is selected from at least one alkyl-modified silicone oil having the following chemical structural formula (1).
[0022] R1R2R3SiO(R4MeSiO) m (Me2SiO) n SiR5R6R7(1)
[0023] In formula (1), R1, R2, R3, R5, R6, and R7 are each independently selected from C1-C3 alkyl groups, preferably methyl groups; R4 is a C6-C3 alkyl group. 18 Alkyl groups, preferably C8-C 14 Alkyl groups; m and n are positive numbers and satisfy 0.1 < m / (m+n) < 0.5, preferably 0.2 < m / (m+n) < 0.4; 5 < m+n < 40, preferably 10 < m+n < 35.
[0024] Furthermore, the viscosity of component A, the alkyl-modified silicone oil, at 25°C is ≤80 mPa·s, preferably ≤60 mPa·s.
[0025] Furthermore, the general structural formula of aminoolefins is: , where n is a natural number and satisfies 2≤n≤6.
[0026] Furthermore, the structural formula of dichloroalkanes is: , where n is a natural number and satisfies 1≤n≤5.
[0027] Furthermore, the mass ratio of aminoolefins, dichloroalkanes, sodium bicarbonate, and ethanol in S1 is 8.5–14:11–17:16–18:120–160.
[0028] Furthermore, the dialkyl phosphite is one of dimethyl phosphite and diethyl phosphite.
[0029] Furthermore, the mass ratio of the corrosion inhibitor precursor, dialkyl phosphite, iodine, and toluene in S2 is 20–34: 20–25: 0.4–0.6: 160–200.
[0030] Furthermore, the component B, the polyether-modified silicone oil, is selected from at least one polyether-modified silicone oil having the following chemical structural formula (2).
[0031] R8R9R 10 SiO(R 11 MeSiO) p (R 12 Me1SiO) q SiR 13 R 14 R 15 (2)
[0032] In equation (2), R8, R9, R 10 R 13 R 14 R 15 Each alkyl group is independently selected from C1-C3, preferably methyl; R 11 The groups selected from the following structural formula (3) are positive numbers, and satisfy 0 < p / (p+q) < 0.3. When p / (p+q) > 0.3, the compatibility between component A and component B deteriorates. Preferably, 0.05 < p / (p+q) < 0.2; 3 < p+q < 80, preferably 5 < p+q < 60. 12 It is a corrosion inhibitor bonding structure.
[0033] -(CH2CH2O) s (CHCH3CH2O) t R 16 (3)
[0034] In equation (3), R 16 The alkyl group is C1-C3, preferably methyl; s≥1, t≥0, and satisfy 3<s+t<30, s+t>30, then the viscosity of component B polyether modified silicone oil is relatively high, and the compatibility with component A alkyl modified silicone oil is poor; s+t<3, then the improvement of the wetting of polar surfaces by component B polyether modified silicone oil is limited, preferably 5<s+t<25; s / (s+t)>0.4.
[0035] Furthermore, the platinum catalyst is one of the Speier catalyst and the Kastedt catalyst.
[0036] Furthermore, the mass ratio of corrosion inhibitor, nano-alumina, and xylene in S3 is 32–52: 25–35: 200–300.
[0037] Furthermore, the mass ratio of hydrogen-containing siloxane, modifier, allyl-terminated polyether and platinum catalyst in S4 is 100-110:30-50:30-50:0.1-0.3.
[0038] Furthermore, component A accounts for 70%-95% of the total weight of the coolant formulation; component B, polyether-modified silicone oil, accounts for 5%-30%.
[0039] Furthermore, the organosilicon coolant is used in the thermal management of open or immersion electrical appliances and servers.
[0040] An organosilicon coolant is prepared by any of the above preparation steps.
[0041] The beneficial effects of this invention are:
[0042] 1) This invention uses aminoolefins and dichloroalkanes as raw materials to carry out nucleophilic substitution reactions to obtain corrosion inhibitor precursors. The corrosion inhibitor precursors are then used to carry out nucleophilic substitution reactions with dialkyl phosphite as raw materials to obtain corrosion inhibitors. The corrosion inhibitors are then used to carry out coordination reactions with nano-alumina to obtain modifiers. The modifiers are then used together with polyethers to modify hydrosiloxanes through hydrosilylation to obtain component B polyether-modified silicone oil. Simultaneously, hydrosilylation reactions are carried out with hydrosiloxanes and alkylolefins as raw materials to obtain component A alkyl-modified silicone oil. Finally, component A alkyl-modified silicone oil and component B polyether-modified silicone oil are blended to obtain an organosilicon coolant.
[0043] 2) The alkyl-modified silicone oil in this invention has good thermal stability, lubricity, and chemical inertness, and can provide basic heat dissipation and protection performance for the coolant. The polyether-modified silicone oil, through the polyether segments in its molecular structure, interacts with polar surfaces, thereby significantly improving the wettability of the coolant on polar surfaces.
[0044] 3) The phosphate groups in the polyether-modified silicone oil of this invention and the organosilicon coolant themselves have strong metal affinity, and can be adsorbed on the surface of metals such as copper and aluminum to form a dense and robust phosphate protective film. This protective film can effectively prevent moisture, oxygen, and other substances in the coolant that may corrode the metal from directly contacting the metal, thereby fundamentally inhibiting the occurrence of metal corrosion. The two work synergistically to prevent further corrosion of the metal. Moreover, phosphate molecules can prevent the further aggregation and deposition of organosilicon particles precipitated during operation through electrostatic repulsion and steric hindrance effects. Phosphate groups can also be adsorbed on the surface of nano-alumina used as filler, effectively preventing alumina filler agglomeration and achieving stable dispersion of the filler.
[0045] 4) The multiple phosphate groups of this invention, acting as side groups, are attached to the polyether-silicone oil molecular chain, hindering the approach and stacking of adjacent molecular chains and maintaining a greater distance between them. Increased intermolecular distance significantly weakens intermolecular interactions, allowing molecular chains to easily slide past each other, thereby reducing the viscosity of the coolant. Furthermore, the phosphate structure can improve the compatibility of silicone oil with polar surfaces through hydrogen bonding or electrostatic interactions. Detailed Implementation
[0046] The technical solutions of the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.
[0047] The polyether-modified silicone oil of component B used in this invention was purchased from Jinan Yingyu Chemical Co., Ltd. The structure of the polyether-modified silicone oil of component B is shown in Table 1. There are no special restrictions on the source of other raw materials; they can be purchased on the market or prepared according to conventional methods known to those skilled in the art.
[0048] Table 1 Example
[0049] Step 1: Under nitrogen protection, 400g of hydrogen-containing siloxane, 200g of hexene and 0.1g of Speier catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 70°C for 5 hours to obtain component A, alkyl-modified silicone oil.
[0050] The second step involves adding 350g of component A (alkyl-modified silicone oil), 25g of component B1 (polyether-modified silicone oil), 10g of nano-alumina, 9g of antioxidant 1010, and 5g of defoamer to a mixer and mixing them thoroughly. The mixture is then allowed to stand and mature before being filtered to remove impurities, resulting in an organosilicon coolant.
[0051] Example 2
[0052] Step 1: Under nitrogen protection, 500g of hydrogen-containing siloxane, 250g of dodecene and 0.2g of platinum catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 75°C for 4 hours to obtain component A, alkyl-modified silicone oil.
[0053] The second step involves adding 412.5g of component A (alkyl-modified silicone oil), 87.5g of component B2 (polyether-modified silicone oil), 75g of nano-alumina, 10g of antioxidant 1076, and 5.5g of defoamer to a mixer and mixing them thoroughly. The mixture is then allowed to stand and mature before being filtered to remove impurities, resulting in an organosilicon coolant.
[0054] Example 3
[0055] Step 1: Under nitrogen protection, 600g of hydrogen-containing siloxane, 300g of octadecene and 0.3g of platinum catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 80℃ for 3 hours to obtain component A, alkyl-modified silicone oil.
[0056] The second step involves adding 475g of alkyl-modified silicone oil, 150g of B3 polyether-modified silicone oil, 30g of nano-alumina, 11g of antioxidant 1035, and 6g of defoamer to a mixer and mixing them thoroughly. The mixture is then allowed to stand and mature before being filtered to remove impurities, resulting in an organosilicon coolant.
[0057] Example 4
[0058] A method for preparing an organosilicon coolant includes the following steps:
[0059] Step 1: Under nitrogen protection, 400g of hydrogen-containing siloxane, 200g of hexene and 0.1g of Speier catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 70°C for 5 hours to obtain component A, alkyl-modified silicone oil.
[0060] The second step involves adding 350g of component A (alkyl-modified silicone oil), 25g of component B4 (polyether-modified silicone oil), 9g of antioxidant 1010, and 5g of defoamer to a mixer and mixing them thoroughly. The mixture is then allowed to stand and mature before being filtered to remove impurities, resulting in an organosilicon coolant.
[0061] The B4 polyether-modified silicone oil is prepared by the following steps:
[0062] S1. Add 8.5g of 5-amino-1-pentene, 11g of 1,3-dichloropropane, 16g of sodium bicarbonate and 120g of ethanol to a three-necked flask, attach a condenser and a thermometer, turn on magnetic stirring, and react at 70℃ for 50min. After the reaction is completed, cool to room temperature and remove the solvent by rotary evaporation. Then extract with ethyl acetate and retain the organic phase. Wash the organic phase with water and dry to obtain the corrosion inhibitor precursor.
[0063] S2. Add 20g of corrosion inhibitor precursor, 20g of dimethyl phosphite, 0.4g of iodine and 160g of toluene to a three-necked flask, attach a condenser and thermometer, turn on magnetic stirring, and react at 30℃ for 40min. After the reaction is completed and cooled to room temperature, remove the solvent by rotary evaporation, extract with ethyl acetate and retain the organic phase, then wash the organic phase with saturated brine and dry to obtain the corrosion inhibitor.
[0064] S3. Add 32g of corrosion inhibitor, 25g of nano alumina and 200g of xylene to a three-necked flask, attach a condenser and a thermometer, turn on magnetic stirring, and react at 70℃ for 8 hours. After the reaction is complete, filter the product to remove the solid and obtain the modifier.
[0065] S4. Under nitrogen protection, 100g of hydrogen-containing siloxane, 30g of modifier, 30g of allyl-terminated polyether and 0.1g of Speier catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 70°C for 5 hours to obtain component B4 polyether-modified silicone oil.
[0066] An organosilicon coolant is prepared by the above preparation steps.
[0067] Example 5
[0068] A method for preparing an organosilicon coolant includes the following steps:
[0069] Step 1: Under nitrogen protection, 500g of hydrogen-containing siloxane, 250g of dodecene and 0.2g of platinum catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 75°C for 4 hours to obtain component A, alkyl-modified silicone oil.
[0070] The second step involves adding 412.5g of component A (alkyl-modified silicone oil), 87.5g of component B4 (polyether-modified silicone oil), 10g of antioxidant 1076, and 5.5g of defoamer to a mixer and mixing them thoroughly. The mixture is then allowed to stand and mature before being filtered to remove impurities, resulting in an organosilicon coolant.
[0071] The B4 polyether-modified silicone oil is prepared by the following steps:
[0072] S1. Add 11g of 7-amino-1-hepten, 14g of 1,5-dichloropentane, 17g of sodium bicarbonate and 140g of ethanol to a three-necked flask, attach a condenser and a thermometer, turn on magnetic stirring, and react at 75℃ for 45min. After the reaction is completed, cool to room temperature and remove the solvent by rotary evaporation. Then extract with ethyl acetate and retain the organic phase. Wash the organic phase with water and dry to obtain the corrosion inhibitor precursor.
[0073] S2. Add 27g of corrosion inhibitor precursor, 22.5g of diethyl phosphite, 0.5g of iodine and 180g of toluene to a three-necked flask, attach a condenser and thermometer, turn on magnetic stirring, and react at 35℃ for 35min. After the reaction is completed and cooled to room temperature, remove the solvent by rotary evaporation, extract with ethyl acetate and retain the organic phase, then wash the organic phase with saturated brine and dry to obtain the corrosion inhibitor.
[0074] S3. Add 42g of corrosion inhibitor, 30g of nano-alumina, and 250g of xylene to a three-necked flask, attach a condenser and thermometer, turn on magnetic stirring, and react at 75℃ for 7 hours. After the reaction is complete, filter the product to remove the solid, and obtain the modifier.
[0075] S4. Under nitrogen protection, 105g of hydrogen-containing siloxane, 40g of modifier, 40g of allyl-terminated polyether and 0.2g of Kastedt catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 75°C for 4 hours to obtain component B4 polyether-modified silicone oil.
[0076] An organosilicon coolant is prepared by the above preparation steps.
[0077] Example 6
[0078] A method for preparing an organosilicon coolant includes the following steps:
[0079] Step 1: Under nitrogen protection, 600g of hydrogen-containing siloxane, 300g of octadecene and 0.3g of platinum catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 80℃ for 3 hours to obtain component A, alkyl-modified silicone oil.
[0080] The second step involves adding 475g of alkyl-modified silicone oil, 150g of B4 polyether-modified silicone oil, 30g of nano-alumina, 11g of antioxidant 1035, and 6g of defoamer to a mixer and mixing them thoroughly. The mixture is then allowed to stand and mature before being filtered to remove impurities, resulting in an organosilicon coolant.
[0081] The B4 polyether-modified silicone oil is prepared by the following steps:
[0082] S1. Add 14g of 9-amino-1-nonene, 17g of 1,7-dichloroheptane, 18g of sodium bicarbonate and 160g of ethanol to a three-necked flask, attach a condenser and a thermometer, turn on magnetic stirring, and react at 80℃ for 40min. After the reaction is completed, cool to room temperature and remove the solvent by rotary evaporation. Then extract with ethyl acetate and retain the organic phase. Wash the organic phase with water and dry to obtain the corrosion inhibitor precursor.
[0083] S2. Add 34g of corrosion inhibitor precursor, 25g of dimethyl phosphite, 0.6g of iodine and 200g of toluene to a three-necked flask, attach a condenser and thermometer, turn on magnetic stirring, and react at 40℃ for 30min. After the reaction is completed and cooled to room temperature, remove the solvent by rotary evaporation, extract with ethyl acetate and retain the organic phase, then wash the organic phase with saturated brine and dry to obtain the corrosion inhibitor.
[0084] S3. Add 52g of corrosion inhibitor, 35g of nano alumina and xylene to a three-necked flask, attach a condenser and a thermometer, turn on magnetic stirring, and react at 80℃ for 6 hours. After the reaction is complete, filter the product to remove the solid and obtain the modifier.
[0085] S4. Under nitrogen protection, 110g of hydrogen-containing siloxane, 50g of modifier, 50g of allyl-terminated polyether and 0.3g of Speier catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and magnetic stirring was turned on. The mixture was reacted at 80°C for 3 hours to obtain component B4 polyether-modified silicone oil.
[0086] An organosilicon coolant is prepared by the above preparation steps.
[0087] Comparative Example 1
[0088] The difference between this embodiment and Embodiment 2 is that the structure of component B, the polyether-modified silicone oil, is changed to B5, while the other raw materials and preparation steps remain unchanged.
[0089] Comparative Example 2
[0090] The difference between this embodiment and Example 2 is that the structure of component B, the polyether-modified silicone oil, is changed to B6, while the other raw materials and preparation steps remain unchanged.
[0091] Comparative Example 3
[0092] The difference between this embodiment and Example 5 is that the structure of component B, the polyether-modified silicone oil, is changed to B7, while the other raw materials and preparation steps remain unchanged.
[0093] Comparative Example 4
[0094] Under nitrogen protection, 601g of hydrogen-containing siloxane, 305.2g of octene and 0.3g of Speier catalyst were added to a three-necked flask, a condenser and a thermometer were installed, and a magnetic stirrer was turned on. The reaction was carried out at 70°C for 5 hours. After the addition was completed, stirring was continued for 4 hours. Then, the mixture was distilled to remove unreacted alkyl olefins. The product obtained was the alkyl-modified silicone oil used in the experiment.
[0095] Experimental Example 1
[0096] The coolants of Examples 1-6 and Comparative Examples 1-4 were subjected to performance tests. Each group of coolants was placed at room temperature for 24 hours and their appearance was observed. If the appearance was uniform and there was no layering, it was determined to be compatible; otherwise, it was determined to be incompatible. For compatibility testing, 50 microliters of sample were dropped onto different polarity surfaces, and after standing for 30 minutes, the area of liquid spread on the substrate was measured and calculated. The composition of Examples 1-6 and Comparative Examples 1-4 and the relevant test results are shown in Table 2.
[0097] Table 2
[0098]
[0099] As shown in Table 2, the polyether-modified silicone oil used in Comparative Example 1 has a polyether-modified portion with p / (p+q)>0.3, indicating poor system compatibility. The polyether-modified silicone oil used in Comparative Example 2 has an excessively long polyether chain (s+t>30), also indicating poor system compatibility. The formulation of Comparative Example 4 contains only alkyl silicone oil, resulting in relatively limited wetting and spreading on polar surfaces. The formulations of Examples 1-3, using alkyl silicone oil and the polyether-modified silicone oil described in this invention, show a significantly increased spreading area on polar surfaces compared to Comparative Example 4, demonstrating better wettability. Compared to Comparative Example 3, the addition of corrosion inhibitors to the polyether-modified silicone oils in Examples 4-6 further increases the spreading area on polar surfaces.
[0100] Experiment Example 2
[0101] The self-made corrosion inhibitors of Examples 4-6 and Comparative Example 3 were subjected to performance tests. The corrosion rate of P110 steel specimens was tested at 70°C for 4 hours. The corrosion medium was 15% hydrochloric acid and the amount of corrosion inhibitor added was 1%. The test results are shown in Table 3.
[0102] Table 3
[0103]
[0104] As can be seen from Table 3, Examples 4 to 6 have low corrosion rates, indicating that the self-made corrosion inhibitor has good metal corrosion inhibition ability.
[0105] The descriptions of the above embodiments are merely illustrative of the methods and core ideas of the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A method for preparing an organosilicon coolant, characterized in that, Includes the following steps: Preparation of component B polyether modified silicone oil: A corrosion inhibitor precursor is obtained through a nucleophilic substitution reaction of aminoolefin and dichloroalkane. The corrosion inhibitor precursor is then subjected to a nucleophilic substitution reaction with dialkyl phosphite to obtain the corrosion inhibitor. The corrosion inhibitor is then subjected to a coordination reaction with nano-alumina to obtain the modifier. Finally, the component B polyether modified silicone oil is obtained by hydrosilylation of the modifier, allyl-terminated polyether, and hydrosiloxane under the action of platinum catalyst. Preparation of organosilicon coolant: Component A alkyl-modified silicone oil is obtained by hydrosilylation reaction of alkyl olefin and hydrogen-containing silicone oil under the action of platinum catalyst; then, component A alkyl-modified silicone oil, component B polyether-modified silicone oil, antioxidant and defoamer are blended to obtain organosilicon coolant.
2. The method for preparing an organosilicon coolant according to claim 1, characterized in that, The general structural formula of aminoolefins is Where n is a natural number and satisfies 2≤n≤6, the structural formula of dichloroalkane is: Where n is a natural number and satisfies 1≤n≤5, the structural formula of the alkyl olefin is: , where n is a natural number and satisfies 2≤n≤14.
3. The method for preparing an organosilicon coolant according to claim 1, characterized in that, The alkyl-modified silicone oil of component A is selected from at least one of alkyl-modified silicone oils having the following chemical structural formula (1). R1R2R3SiO(R4MeSiO) m (Me2SiO) n SiR5R6R7(1) In formula (1), R1, R2, R3, R5, R6, and R7 are each independently selected from C1-C3 alkyl groups; R4 is a C6-C4 alkyl group. 18 Alkyl groups; m and n are positive numbers, and satisfy 0.1 < m / (m+n) < 0.5, 5 < m+n < 40.
4. The method for preparing an organosilicon coolant according to claim 1, characterized in that, The viscosity of component A, alkyl-modified silicone oil, is ≤80 mPa·s at 25°C.
5. The method for preparing an organosilicon coolant according to claim 1, characterized in that, The mass ratio of aminoolefins to dichloroalkanes is 8.5–14:11–17; the mass ratio of corrosion inhibitor precursors to dialkyl phosphite esters is 20–34:20–25; the mass ratio of corrosion inhibitors to nano-alumina is 32–52:25–35; the mass ratio of hydrosiloxanes, modifiers, allyl-terminated polyethers, and platinum catalysts is 100–110:32–52:30–50:0.1–0.3; the mass ratio of hydrosiloxanes, alkylolefins, and platinum catalysts is 400–600:200–300:0.1–0.3; and the mass ratio of polyether-modified silicone oil, alkyl-modified silicone oil, antioxidants, and defoamers is 25–150:350–475:9–11:5–6.
6. The method for preparing an organosilicon coolant according to claim 1, characterized in that, Dialkyl phosphite is one of dimethyl phosphite and diethyl phosphite; platinum catalyst is one of Kastedt catalyst and Speier catalyst; antioxidant is at least one of antioxidant 1010, antioxidant 1076 and antioxidant 1035.
7. The method for preparing an organosilicon coolant according to claim 1, characterized in that, The component B, the polyether-modified silicone oil, is selected from at least one polyether-modified silicone oil having the following chemical structural formula (2). R8R9R 10 SiO(R 11 MeSiO) p (R 12 Me1SiO) q SiR 13 R 14 R 15 (2) In equation (2), R8, R9, R 10 R 13 R 14 R 15 Each alkyl group independently selected from C1-C3, R 11 Groups selected from the following structural formula (3), where p and q are positive numbers, and satisfy 0 < p / (p + q) < 0.3, 3 < p + q < 80, R 12 It is a corrosion inhibitor bonding structure. -(CH2CH2O) s (CHCH3CH2O) t R 16 (3) In equation (3), R 16 It is a C1-C3 alkyl group; s≥1, t≥0, and satisfies 3<s+t<30, s+t>30, s / (s+t)>0.
4.
8. The method for preparing an organosilicon coolant according to claim 1, characterized in that, Component A accounts for 70%-95% of the total weight of the coolant formulation; component B, polyether-modified silicone oil, accounts for 5%-30%.
9. An organosilicon coolant, characterized in that, The organosilicon coolant is prepared by the preparation method described in any one of claims 1 to 8.
10. The organosilicon coolant according to claim 9, characterized in that, The application of the described silicone coolant in open or immersion cooling systems and server thermal management.