Ternary system degradable silicon-based insulating heat-conducting liquid

Abstract

The ternary system degradable silicon-based insulating heat-conducting liquid is prepared from the following raw materials in parts by weight: 470 to 993 parts of silicone oil, 1 to 330 parts of ester insulating liquid, 1 to 130 parts of natural ester oil, 1 to 10 parts of dispersing agent, 1 to 10 parts of wetting agent, 1 to 10 parts of defoaming agent, 1 to 20 parts of preservative and 1 to 20 parts of antirust agent, silicone oil is used as a matrix, linear-chain saturated fatty acid and linear-chain alcohol are subjected to a reaction to prepare the heat conduction material, the heat conduction material has non-toxic and degradable performance and meets the requirement for environmental protection, and a ternary system of the silicone oil, the synthetic ester insulating liquid and the natural ester oil is adopted to construct a ternary insulating heat conduction system. And on the other hand, excellent thermal conductivity can be synergistically realized.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid insulation, and in particular to a ternary system degradable silicon-based insulating heat-conducting liquid. Background Art

[0002] Data centers are the core computing infrastructure supporting the development of the digital economy and intelligent society. Within this framework, thermal solutions comprised of immersion liquid cooling systems and server clusters play a critical role in ensuring stable and efficient data center operations. Insulating thermal fluids must demonstrate exceptional comprehensive performance to maintain the reliability of liquid-cooled data center systems. To address the accelerated global digital transformation, the explosive growth of large AI models, and the advancement of the East-West Computing Project, the industry is increasingly demanding new data center infrastructure featuring high computing density, low energy consumption, high reliability, and environmental friendliness. Consequently, the construction of supercomputing centers, intelligent computing centers, and large-scale data centers places multi-dimensional performance requirements on insulating thermal fluids. These require them to possess excellent insulation properties, high thermal conductivity, low electrical conductivity, wide temperature stability, and environmental friendliness.

[0003] Mineral oil, silicone oil, and ester oil (including natural and synthetic esters) are the three most commonly used types of insulating fluid in power systems. However, mineral oils suffer from drawbacks such as low flash point, high pour point, poor low-temperature fluidity, susceptibility to aging, poor biodegradability, and environmental pollution in the event of a leak. These drawbacks severely impact the safe operation and service life of data centers. This falls significantly short of the goals of low-carbon environmental protection and the development needs of future green data centers. Currently, the focus is on replacing mineral insulating oil with silicone oil, natural esters, synthetic esters, modified esters, and blended insulating oils. Silicone oil offers advantages in fire safety, chemical stability, wide temperature adaptability, insulation, and compatibility, but suffers from non-biodegradability. Compared to the former two, ester insulating oils offer significant advantages in electrical performance, renewability, and environmental friendliness. However, ester insulating oils have disadvantages such as high viscosity, poor oxidative stability, and low breakdown strength. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a degradable insulating thermal conductive liquid and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] The ternary system degradable silicon-based insulating thermal conductive fluid comprises the following raw materials in parts by weight: 470-993 parts of silicone oil, 1-330 parts of ester insulating liquid, 1-130 parts of natural ester oil, 1-10 parts of dispersant, 1-10 parts of wetting agent, 1-10 parts of defoaming agent, 1-20 parts of preservative and 1-20 parts of rust inhibitor;

[0007] The ester insulating liquid is prepared by esterification of a straight-chain alcohol and a straight-chain saturated fatty acid;

[0008] The natural ester oil is a mixture of one or more of soybean oil, rapeseed oil, sunflower oil, palm oil, olive oil, linseed oil, peanut oil, rice bran oil and corn oil in any proportion.

[0009] Furthermore, the silicone oil is phenyl silicone oil.

[0010] Furthermore, the ester insulating liquid is prepared by the following steps:

[0011] Add straight-chain saturated fatty acids, straight-chain alcohols and catalysts into a three-necked flask, heat to 70-90°C, and keep warm for 2-6 hours. After the reaction is completed, cool and let stand. The system will automatically separate into layers. The upper layer is the corresponding synthetic ester and the lower layer is the ionic liquid phase. Separate them by decantation to obtain an ester insulating liquid.

[0012] Furthermore, the straight-chain alcohol is ethanol, and the straight-chain saturated fatty acid is caprylic acid or capric acid.

[0013] Furthermore, the molar ratio of the linear alcohol to the linear saturated fatty acid is controlled to be 1:3, and the amount of the catalyst is 3% of the total weight of the linear alcohol and the linear saturated fatty acid.

[0014] Furthermore, the dispersant is Techniclean SC 170 (Castrol), the wetting agent is a silicone wetting agent (TR-40F), the defoaming agent is dimethyl silicone oil, the preservative is CHF-6022, and the rust inhibitor is BP rust inhibitor.

[0015] Furthermore, the ternary system degradable silicon-based insulating thermal conductive fluid is prepared by the following steps:

[0016] The raw materials are mixed and stirred evenly to prepare a ternary system degradable silicon-based insulating thermal conductive fluid.

[0017] Beneficial effects of the present invention:

[0018] The present invention prepares an insulating thermal conductive liquid, which uses silicone oil as a matrix and is made by reacting straight-chain saturated fatty acids and straight-chain alcohols. The liquid is non-toxic and degradable, meeting environmental protection requirements. In addition, a ternary system of silicone oil, synthetic ester insulating liquid and natural ester oil is used to construct a ternary insulating thermal conductive system. On the one hand, the system is environmentally friendly, non-toxic and degradable, and on the other hand, it can synergistically achieve excellent thermal conductivity. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] Example 1: A ternary system biodegradable silicon-based insulating thermal fluid comprises the following raw materials in parts by weight: 470 parts of silicone oil, 1 part of ester insulating liquid, 1 part of natural ester oil, 1 part of dispersant, 1 part of wetting agent, 1 part of defoaming agent, 1 part of preservative and 1 part of rust inhibitor;

[0021] The ester insulating liquid is prepared by esterification of a straight-chain alcohol and a straight-chain saturated fatty acid;

[0022] The natural ester oil is soybean oil.

[0023] The silicone oil is phenyl silicone oil.

[0024] The ester insulating liquid is prepared by the following steps:

[0025] Add straight-chain saturated fatty acids, straight-chain alcohols and concentrated sulfuric acid into a three-necked flask, heat to 70°C, and keep warm for 2 hours. After the reaction is completed, cool and let stand. The system will automatically separate into layers. The upper layer is the corresponding synthetic ester and the lower layer is the ionic liquid phase. Separate them by decantation to obtain an ester insulating liquid.

[0026] The straight-chain alcohol is ethanol, and the straight-chain saturated fatty acid is octanoic acid.

[0027] The molar ratio of the linear alcohol to the linear saturated fatty acid is controlled to be 1:3, and the amount of the catalyst is 3% of the total weight of the linear alcohol and the linear saturated fatty acid.

[0028] The dispersant is Techniclean SC 170 (Castrol), the wetting agent is an organosilicon wetting agent (TR-40F), the defoaming agent is dimethyl silicone oil, the preservative is CHF-6022, and the rust inhibitor is BP rust inhibitor.

[0029] The ternary system degradable silicon-based insulating thermal conductive fluid is prepared by the following steps:

[0030] The raw materials are mixed and stirred evenly to prepare a ternary system degradable silicon-based insulating thermal conductive fluid.

[0031] Example 2: A ternary system degradable silicon-based insulating thermal conductive fluid comprises the following raw materials in parts by weight: 600 parts of silicone oil, 150 parts of ester insulating liquid, 100 parts of natural ester oil, 5 parts of dispersant, 5 parts of wetting agent, 5 parts of defoaming agent, 10 parts of preservative and 10 parts of rust inhibitor;

[0032] The ester insulating liquid is prepared by esterification of a straight-chain alcohol and a straight-chain saturated fatty acid;

[0033] The natural ester oil is rapeseed oil.

[0034] The silicone oil is phenyl silicone oil.

[0035] The ester insulating liquid is prepared by the following steps:

[0036] Add straight-chain saturated fatty acids, straight-chain alcohols and concentrated sulfuric acid into a three-necked flask, heat to 80°C, and keep warm for 4 hours. After the reaction is completed, cool and let stand. The system will automatically separate into layers. The upper layer is the corresponding synthetic ester and the lower layer is the ionic liquid phase. Separate them by decantation to obtain an ester insulating liquid.

[0037] The straight-chain alcohol is ethanol, and the straight-chain saturated fatty acid is capric acid.

[0038] The molar ratio of the linear alcohol to the linear saturated fatty acid is controlled to be 1:3, and the amount of the catalyst is 3% of the total weight of the linear alcohol and the linear saturated fatty acid.

[0039] The dispersant is Techniclean SC 170 (Castrol), the wetting agent is an organosilicon wetting agent (TR-40F), the defoaming agent is dimethyl silicone oil, the preservative is CHF-6022, and the rust inhibitor is BP rust inhibitor.

[0040] The ternary system degradable silicon-based insulating thermal conductive fluid is prepared by the following steps:

[0041] The raw materials are mixed and stirred evenly to prepare a ternary system degradable silicon-based insulating thermal conductive fluid.

[0042] Example 3: A ternary system degradable silicon-based insulating thermal conductive fluid comprises the following raw materials in parts by weight: 993 parts of silicone oil, 330 parts of ester insulating liquid, 130 parts of natural ester oil, 10 parts of dispersant, 10 parts of wetting agent, 10 parts of defoaming agent, 20 parts of preservative and 20 parts of rust inhibitor;

[0043] The ester insulating liquid is prepared by esterification of a straight-chain alcohol and a straight-chain saturated fatty acid;

[0044] The natural ester oil is sunflower oil.

[0045] The silicone oil is phenyl silicone oil.

[0046] The ester insulating liquid is prepared by the following steps:

[0047] Add straight-chain saturated fatty acids, straight-chain alcohols and concentrated sulfuric acid into a three-necked flask, heat to 90°C, and keep warm for 6 hours. After the reaction is completed, cool and let stand. The system will automatically separate into layers. The upper layer is the corresponding synthetic ester and the lower layer is the ionic liquid phase. Separate them by decantation to obtain an ester insulating liquid.

[0048] The straight-chain alcohol is ethanol, and the straight-chain saturated fatty acid is octanoic acid.

[0049] The molar ratio of the linear alcohol to the linear saturated fatty acid is controlled to be 1:3, and the amount of the catalyst is 3% of the total weight of the linear alcohol and the linear saturated fatty acid.

[0050] The dispersant is Techniclean SC 170 (Castrol), the wetting agent is an organosilicon wetting agent (TR-40F), the defoaming agent is dimethyl silicone oil, the preservative is CHF-6022, and the rust inhibitor is BP rust inhibitor.

[0051] Furthermore, the ternary system degradable silicon-based insulating thermal conductive fluid is prepared by the following steps:

[0052] The raw materials are mixed and stirred evenly to prepare a ternary system degradable silicon-based insulating thermal conductive fluid.

[0053] Comparative Example 1: Compared with Example 1, this example was prepared without adding natural ester oil, and the rest was the same as Example 1.

[0054] The properties of the insulating thermal conductive fluids prepared in Examples 1-3 and Comparative Example 1 were tested, and the results are shown in Table 1 below:

[0055] Table 1

[0056]

[0057] It can be seen from Table 1 above that the insulating thermal conductive fluids prepared in Examples 1-3 of the present invention have excellent performance.

[0058] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. Ternary system degradable silicon-based insulating thermal fluid, characterized by: The invention comprises the following raw materials in parts by weight: 470-993 parts of silicone oil, 1-330 parts of ester insulating liquid, 1-130 parts of natural ester oil, 1-10 parts of dispersant, 1-10 parts of wetting agent, 1-10 parts of defoaming agent, 1-20 parts of preservative and 1-20 parts of rust inhibitor; The ester insulating liquid is prepared by esterification of a straight-chain alcohol and a straight-chain saturated fatty acid; The natural ester oil is a mixture of one or more of soybean oil, rapeseed oil, sunflower oil, palm oil, olive oil, linseed oil, peanut oil, rice bran oil and corn oil in any proportion.

2. The ternary system degradable silicon-based insulating thermal conductive fluid according to claim 1, characterized in that: The silicone oil is phenyl silicone oil.

3. The ternary system degradable silicon-based insulating thermal conductive fluid according to claim 1, characterized in that: The ester insulating liquid is prepared by the following steps: Add straight-chain saturated fatty acids, straight-chain alcohols and catalysts into a three-necked flask, heat to 70-90°C, and keep warm for 2-6 hours. After the reaction is completed, cool and let stand. The system will automatically separate into layers. The upper layer is the corresponding synthetic ester and the lower layer is the ionic liquid phase. Separate them by decantation to obtain an ester insulating liquid.

4. The ternary degradable silicon-based insulating thermal fluid according to claim 3, characterized in that: The straight-chain alcohol is ethanol, and the straight-chain saturated fatty acid is caprylic acid or capric acid.

5. The ternary degradable silicon-based insulating thermal fluid according to claim 3, characterized in that: The molar ratio of the linear alcohol to the linear saturated fatty acid is controlled to be 1:3, and the amount of the catalyst is 3% of the total weight of the linear alcohol and the linear saturated fatty acid.

6. The ternary degradable silicon-based insulating thermal fluid according to claim 1, characterized in that: The dispersant is Techniclean SC 170, the wetting agent is an organic silicon wetting agent, the defoaming agent is dimethyl silicone oil, the preservative is CHF-6022, and the rust inhibitor is BP rust inhibitor.

7. The ternary degradable silicon-based insulating thermal fluid according to claim 1, characterized in that: The ternary system degradable silicon-based insulating thermal conductive fluid is prepared by the following steps: The raw materials are mixed and stirred evenly to prepare a ternary system degradable silicon-based insulating thermal conductive fluid.

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