CN112521914B - Heat management liquid and preparation method thereof - Google Patents
Heat management liquid and preparation method thereof Download PDFInfo
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- CN112521914B CN112521914B CN202011435866.7A CN202011435866A CN112521914B CN 112521914 B CN112521914 B CN 112521914B CN 202011435866 A CN202011435866 A CN 202011435866A CN 112521914 B CN112521914 B CN 112521914B
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Abstract
The invention discloses a heat management liquid and a preparation method thereof, wherein the heat management liquid is prepared from the following raw materials in parts by weight: 35-90 parts of ethylene glycol, 0.05-3 parts of phase change material, 0.01-5 parts of anti-corrosion additive, 0.2-0.55 part of alkali metal salt, 0.001-0.05 part of defoaming agent and the balance of deionized water. The preparation method comprises the following steps: mixing the phase change material with 30-50% of glycol and all deionized water to form a solution 1 at 40-60 ℃; mixing the rest glycol with the anti-corrosion additive and the alkali metal salt, stirring for 20-50 minutes to form a solution 2, and cooling to room temperature; adding the solution 1 into the solution 2 at a speed of 0.01-3 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, forming a solution 3 after dropwise adding, adding a defoaming agent into the solution 3, and stirring for 20-50 min; filtering to obtain the product. The heat management liquid has high heat transfer efficiency and good corrosion resistance.
Description
Technical Field
The invention belongs to the field of heat management liquid, and relates to heat management liquid and a preparation method thereof.
Background
With the improvement of the refinement degree of various mechanical and electronic devices, heat management is gradually emphasized. Accurate thermal management facilitates proper operation of the device and increases the useful life of the device. The heat management liquid is a fluid for accurately managing the heat of the equipment, can take away the heat generated by the equipment in time, and can also provide the required heat for the normal operation of the equipment. Such as automotive engine coolant, may carry away heat generated by the engine. For an electric vehicle, the cooling liquid can provide the required heat for the starting of the electric vehicle. For radar equipment, the accurate control of temperature has a great relation to the use precision of the equipment, and the heat management liquid can ensure the temperature control required by the normal use of the heat management liquid.
The current common heat management liquid mainly comprises water-glycol as a base liquid and inorganic or organic additives. The product has good anti-corrosion effect on materials such as red copper, brass, steel, cast iron, soldering tin, cast aluminum and the like, but has no anti-corrosion effect on materials such as zinc, nickel and the like, and meanwhile, the efficiency of the cooling liquid is also to be improved. Therefore, the conventional thermal management liquid cannot satisfy thermal management of precision equipment and thermal management of equipment containing special metal materials.
Disclosure of Invention
The invention aims to solve the technical problem of providing a heat management liquid with high heat transfer efficiency and good corrosion resistance aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the heat management liquid is prepared from the following raw materials in parts by weight:
35-90 parts of ethylene glycol, 0.05-3 parts of phase change material, 0.01-5 parts of anti-corrosion additive, 0.2-0.55 part of alkali metal salt, 0.001-0.05 part of defoaming agent and the balance of deionized water.
Further, in the thermal management liquid, preferably, the phase change material is a substance composed of polyether, alkyl carboxylic acid, and polymethacrylate, where: alkyl carboxylic acid: the weight ratio of the polymethacrylate is (4-5) to (1-2).
Further, in the thermal management liquid, preferably, the polyether structure is:
wherein m = 0-200, n = 0-200, m and n are not zero at the same time, R1Is hydrogen or C1~C30An alkane of (a); r2Is hydrogen or methyl, R3Is C2～C30Of (a) an alkane.
Further, in the thermal management liquid, preferably, the alkyl carboxylic acid in the phase change material is selected from C5-C100A monocarboxylic acid ofAn acid, a dicarboxylic acid or a tricarboxylic acid.
Further, in the thermal management liquid, the dicarboxylic acid in the anti-corrosion additive preferably comprises one or more of sebacic acid, azelaic acid, neo-diacid and glutaric acid.
In the thermal management liquid, the tricarboxylic acid in the anticorrosion additive is preferably:
wherein n is an integer from 0 to 100.
Further, in the thermal management liquid, the polymethacrylate is preferably selected from the group consisting of polymethacrylate with a kinematic viscosity of 100 ℃ and 20000cSt at 40 ℃.
Further, in the thermal management liquid, preferably, the alkali metal salt is: one or more alkali metals selected from sodium hydroxide, potassium hydroxide, calcium hydroxide, and barium hydroxide.
Further, in the heat management liquid, the defoaming agent is preferably one or more of XP-14D, XP-S-129, XPY-30 and XPC-30B.
A preparation method of the heat management liquid comprises the following steps:
A. mixing the phase change material with 30-50% of glycol and all deionized water to form a solution 1 at 40-60 ℃;
B. mixing the rest glycol with the anti-corrosion additive and the alkali metal salt, stirring for 20-50 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at a speed of 0.01-3 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 20-50 minutes; filtering to obtain the product.
In consideration of the corrosion resistance particularity of metals such as zinc, nickel and the like, the incapability of protecting the metals by the traditional heat management liquid and the defects of the existing products, the invention introduces the soluble phase-change material and prepares the heat system management liquid with excellent performance. The product has clear and transparent appearance, has good anti-corrosion effect with metals such as aluminum (1024), aluminum (2011), aluminum (6060), aluminum (6063), aluminum (6061), aluminum (6082), red copper, brass, soldering tin, steel, iron, zinc and the like, and improves the inhibition and protection performance on cavitation corrosion. In addition, the preparation process determines the stable state of the phase-change material in the product, and simultaneously has good compounding effect with other additives.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described in detail.
The heat management liquid is prepared from the following raw materials in parts by weight:
35-90 parts of ethylene glycol, 0.05-3 parts of phase change material, 0.01-5 parts of anti-corrosion additive, 0.2-0.55 part of alkali metal salt, 0.001-0.05 part of defoaming agent and the balance of deionized water.
Further, in the thermal management liquid, preferably, the phase change material is a substance composed of polyether, alkyl carboxylic acid, and polymethacrylate, where: alkyl carboxylic acid: the weight ratio of the polymethacrylate is (4-5) to (1-2).
Further, in the thermal management liquid, preferably, the polyether structure is:
wherein m = 0-200, n = 0-200, m and n are not zero at the same time, R1Is hydrogen or C1~C30An alkane of (a); r2Is hydrogen or methyl, R3Is C2～C30Of (a) an alkane. Preferably, m = 0~100, n = 0~100, R1Is C1~C10Of alkane, R3Is C2～C10Of (a) an alkane. Most preferred is R1Is C1~C5Of alkane, R3Is C2～C5Of (a) an alkane.
Further, the air conditioner is provided with a fan,in the heat management liquid, the alkyl carboxylic acid in the phase change material is preferably selected from C5-C100A monocarboxylic acid, a dicarboxylic acid or a tricarboxylic acid. Preferably C5-C20Monocarboxylic acids, dicarboxylic acids.
Further, in the thermal management liquid, the dicarboxylic acid in the anti-corrosion additive preferably comprises one or more of sebacic acid, azelaic acid, neo-diacid and glutaric acid.
In the thermal management liquid, the tricarboxylic acid in the anticorrosion additive is preferably:
wherein n is an integer from 0 to 100. Preferably n is an integer from 0 to 30, most preferably n is an integer from 0 to 10.
Further, in the thermal management liquid, the polymethacrylate is preferably selected from the group consisting of polymethacrylate with a kinematic viscosity of 100 ℃ and 20000cSt at 40 ℃.
Further, in the thermal management liquid, preferably, the alkali metal salt is: one or more alkali metals selected from sodium hydroxide, potassium hydroxide, calcium hydroxide, and barium hydroxide.
Further, in the heat management liquid, the defoaming agent is preferably one or more of XP-14D, XP-S-129, XPY-30 and XPC-30B. The defoaming agent is not limited to the above-mentioned defoaming agent, and may be other materials to which the present invention is applicable.
A preparation method of the heat management liquid comprises the following steps:
A. mixing the phase change material with 30-50% of glycol and all deionized water to form a solution 1 at 40-60 ℃;
wherein: the phase-change material is prepared from the following raw materials in proportion: 40-50 parts of polyether, 10-20 parts of alkyl carboxylic acid, 10-20 parts of polymethacrylate, a proper amount of deionized water and a proper amount of ethylene glycol.
The phase-change material is prepared by the following steps: dissolving alkyl carboxylic acid in a mixed solution of deionized water and ethylene glycol, and performing ultrasonic treatment for 10-30 minutes to obtain a milky white solution 1; adding polymethacrylate into the solution 1, continuing to perform ultrasonic treatment for 20-50 minutes, and then continuing to stir for 5-20 minutes to obtain a solution 2. Adding polyether into the solution 2 at the speed of 0.01-2.5 mL/min, continuously stirring, and after the polyether is added, continuing stirring for 20-30 min to obtain a solution 3. Filtering the solution 3, removing a mixed solution of solvent deionized water and glycol, and drying at 50-150 ℃ for 0.5-2 hours to obtain a phase change material;
B. mixing the rest glycol with the anti-corrosion additive and the alkali metal salt, stirring for 20-50 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at a speed of 0.01-3 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 20-50 minutes; filtering to obtain the product.
The following is described in detail by way of specific examples:
example 1, a thermal management liquid is prepared from the following raw materials in parts by weight: ethylene glycol 35, phase-change material 0.05, anti-corrosion additive (the mass ratio of tricarboxylic acid to glutaric acid is 1: 2) 5, alkali metal salt (sodium hydroxide) 0.55, defoaming agent (XP-14D) 0.001 and the balance of deionized water.
The tricarboxylic acid structure is:
the preparation method of the phase-change material comprises the following steps:
A. weighing the following raw materials: 40g of polyether, 10g of alkyl carboxylic acid (n-pentanoic acid), 10g of polymethacrylate (the viscosity at 40 ℃ is 1000 cSt), 100mL of deionized water and 100mL of ethylene glycol;
the polyether is:
B. dissolving n-pentanoic acid in a mixed solution of deionized water and ethylene glycol, and performing ultrasonic treatment for 10 minutes to obtain a milky white solution 1; polymethacrylate was added to the solution 1, and sonication was continued for 30 minutes, after which stirring was continued for 10 minutes to obtain a solution 2.
C. Polyether was added to solution 2 at a rate of 0.01 mL/min with constant stirring, and after the polyether was added, stirring was continued for 30 minutes to obtain solution 3.
D. And filtering the solution 3, removing the solvent (a mixed solution of deionized water and ethylene glycol), and drying at 50 ℃ for 1 hour to obtain the phase change material.
A preparation method of the heat management liquid comprises the following steps:
A. mixing the phase change material with 40% of glycol and all deionized water to form a solution 1 at 50 ℃;
B. mixing the rest 60% of ethylene glycol with an anti-corrosion additive and an alkali metal salt, stirring for 30 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at the speed of 2.5 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 30 minutes; filtering to obtain the product.
Example 2, a thermal management liquid is prepared from the following raw materials in parts by weight: 50 parts of ethylene glycol, 2.5 parts of phase change material, 5 parts of anti-corrosion additive (the mass ratio of tricarboxylic acid to new diacid is 1: 2), 0.55 part of alkali metal salt (potassium hydroxide), 0.01 part of defoaming agent (XP-S-129) and the balance of deionized water.
The tricarboxylic acid structure is:
the preparation method of the phase-change material comprises the following steps:
A. weighing the following raw materials: polyether 50g, alkyl carboxylic acid: (
) 20g of polymethacrylate (the kinematic viscosity at 40 ℃ is 10000 cSt) 20g, 200mL of deionized water and 20mL of ethylene glycol;
the polyether is:
B. dissolving alkyl carboxylic acid in a mixed solution of deionized water and ethylene glycol, and performing ultrasonic treatment for 60 minutes to obtain a milky white solution 1; adding polymethacrylate into the solution 1, continuing to perform ultrasonic treatment for 60 minutes, and then continuing to stir for 60 minutes to obtain a solution 2.
C. Polyether was added to solution 2 at a rate of 2 mL/min with continuous stirring, and after the polyether was added, stirring was continued for 60 minutes to obtain solution 3.
D. And filtering the solution 3, removing the solvent (a mixed solution of deionized water and ethylene glycol), and drying at 150 ℃ for 0.5 hour to obtain the phase-change material.
A preparation method of the heat management liquid comprises the following steps:
A. mixing the phase change material with 30% of glycol and all deionized water to form a solution 1 at 40 ℃;
B. mixing the rest 70% of ethylene glycol with an anti-corrosion additive and an alkali metal salt, stirring for 50 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at a rate of 2 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 20 minutes; filtering to obtain the product.
Example 3, a thermal management liquid is prepared from the following raw materials in parts by weight: ethylene glycol 90, a phase-change material 3, an anti-corrosion additive (the mass ratio of tricarboxylic acid to azelaic acid is 1: 2) 0.5, alkali metal salt (calcium hydroxide) 0.35, a defoaming agent (XPY-30) 0.02 and the balance of deionized water.
The tricarboxylic acid structure is:
the preparation method of the phase-change material comprises the following steps:
A. weighing the following raw materials: polyether 45g, alkyl carboxylic acid (C)
) 20g of polymethacrylate (the kinematic viscosity at 40 ℃ is 5000 cSt) 20g, 200mL of deionized water and 100mL of ethylene glycol;
the polyether is:
B. dissolving alkyl carboxylic acid in a mixed solution of deionized water and ethylene glycol, and performing ultrasonic treatment for 40 minutes to obtain a milky white solution 1; polymethacrylate was added to the solution 1, and sonication was continued for 40 minutes, after which stirring was continued for 50 minutes to obtain a solution 2.
C. Polyether was added to solution 2 at a rate of 1.5 mL/min with constant stirring, and after the polyether was added, stirring was continued for 40 minutes to obtain solution 3.
D. And filtering the solution 3, removing the solvent (a mixed solution of deionized water and ethylene glycol), and drying at 60 ℃ for 1 hour to obtain the phase-change material.
A preparation method of the heat management liquid comprises the following steps:
A. mixing the phase change material with 50% of ethylene glycol and all deionized water to form a solution 1 at 40 ℃;
B. mixing the rest 50% of ethylene glycol with an anti-corrosion additive and an alkali metal salt, stirring for 35 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at a rate of 1 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 35 minutes; filtering to obtain the product.
Example 4, a thermal management liquid is prepared from the following raw materials in parts by weight: 60 parts of ethylene glycol, 1.5 parts of phase change material, 4 parts of anti-corrosion additive (the mass ratio of tricarboxylic acid to sebacic acid is 1: 2), 0.25 part of alkali metal salt (barium hydroxide), 0.008 part of defoaming agent (XPY-30), 0.007 part of (XPC-30B) and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 48 parts of polyether, 16 parts of alkyl carboxylic acid and 21 parts of polymethacrylate. The polymethacrylate has the kinematic viscosity of 5000cSt at 40 ℃.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material is described in examples 1-3, and is not described herein.
A preparation method of the heat management liquid comprises the following steps:
A. blending the phase change material with 45% of ethylene glycol and all deionized water to form a solution 1 at 40 ℃;
B. mixing the rest 55% of ethylene glycol with an anti-corrosion additive and an alkali metal salt, stirring for 40 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at the rate of 3 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 40 minutes; filtering to obtain the product.
Example 5, a thermal management liquid, is made from the following raw materials in parts by weight: the phase-change material comprises ethylene glycol 70, a phase-change material 1, an anti-corrosion additive (a mixture of tricarboxylic acid and dicarboxylic acid (the mass ratio of azelaic acid to new diacid is 1: 4)) with the mass ratio of 1:2]3, alkali metal salts (potassium hydroxide) 0.05 and (calcium hydroxide) 0.25, defoaming agents (XPY-30) 0.008 and (XPC-30B) 0.007, a coloring agent 0.03 and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 45 parts of polyether, 15 parts of alkyl carboxylic acid and 10 parts of polymethacrylate. The polymethacrylate has a kinematic viscosity at 40 ℃ of 7000 cSt.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material is described in examples 1-3, and is not described herein.
A preparation method of the heat management liquid comprises the following steps:
A. blending the phase change material with 48% of ethylene glycol and all deionized water to form a solution 1 at 40 ℃;
B. mixing the rest 52% of ethylene glycol with an anti-corrosion additive and an alkali metal salt, stirring for 25 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at the speed of 0.02 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 30 minutes; filtering to obtain the product.
Example 6, a thermal management liquid, is prepared from the following raw materials in parts by weight: ethylene glycol 36, phase change material 2.6, anti-corrosion additive (the mass ratio of tricarboxylic acid to new diacid is 1: 2) 4.5, alkali metal salt (sodium hydroxide) 0.45, defoaming agent (XP-14D) 0.01 and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 46 parts of polyether, 20 parts of alkyl carboxylic acid and 15 parts of polymethacrylate. The polymethacrylate has a kinematic viscosity at 40 ℃ of 12000 cSt.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 7, a thermal management liquid, is made from the following raw materials in parts by weight: 80 parts of ethylene glycol, 3 parts of phase change material, 2.7 parts of anti-corrosion additive (the mass ratio of tricarboxylic acid to new diacid is 1: 2), 0.2 part of alkali metal salt (sodium hydroxide), 0.033 part of defoaming agent (XP-14D) and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 48 parts of polyether, 17.6 parts of alkyl carboxylic acid and 18 parts of polymethacrylate. The polymethacrylate has a kinematic viscosity at 40 ℃ of 18000 cSt.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 8, a thermal management liquid is prepared from the following raw materials in parts by weight: the phase change material comprises ethylene glycol 75, a phase change material 2.1, an anti-corrosion additive (the mass ratio of tricarboxylic acid to glutaric acid is 1: 2) 3.8, alkali metal salt (sodium hydroxide) 0.46, a defoaming agent (XP-14D) 0.007 and the balance of deionized water.
The phase-change material of the embodiment is prepared from the following materials in proportion: 40 parts of polyether, 18 parts of alkyl carboxylic acid and 10 parts of polymethacrylate. The polymethacrylate has the kinematic viscosity of 20000cSt at 40 ℃.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the tricarboxylic acid structure is:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 9, a thermal management liquid, made from the following raw materials in parts by weight: ethylene glycol 44, phase-change material 2.7, anti-corrosion additive (the mass ratio of tricarboxylic acid to glutaric acid is 1: 2) 3.1, alkali metal salt (sodium hydroxide) 0.40, defoaming agent (XP-14D) 0.045 and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 45 parts of polyether, 15 parts of alkyl carboxylic acid and 10 parts of polymethacrylate. The polymethacrylate has a kinematic viscosity of 5500cSt at 40 ℃.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 10, a thermal management liquid, is made from the following raw materials in parts by weight: ethylene glycol 53, phase-change material 2.0, anti-corrosion additive [ tricarboxylic acid: dicarboxylic acid (mixture of sebacic acid: azelaic acid in a mass ratio of 2: 1) ]3.5 in a mass ratio of 1:2, alkali metal salt (calcium hydroxide) 0.35, defoaming agent (XP-S-129) 0.02, and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 40 parts of polyether, 20 parts of alkyl carboxylic acid and 10 parts of polymethacrylate. The polymethacrylate has a kinematic viscosity of 9000cSt at 40 ℃.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 11, a thermal management fluid, made from the following raw materials in parts by weight: ethylene glycol 65, phase change material 1.8, anti-corrosion additive (1: 2 mass ratio of tricarboxylic acid to dicarboxylic acid (mixture of 1:1 mass ratio of neopentyl acid to glutaric acid)) 2.2, alkali metal salt (potassium hydroxide) 0.41, defoaming agent (XPC-30B) 0.01, and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 47 parts of polyether, 12 parts of alkyl carboxylic acid and 13.5 parts of polymethacrylate. The polymethacrylate has the kinematic viscosity at 40 ℃ of 1500 cSt.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 12, a thermal management fluid, is made from the following raw materials in parts by weight: ethylene glycol 65, phase-change material 1.8, anti-corrosion additive (the mass ratio of tricarboxylic acid to azelaic acid is 1: 2) 2.2, alkali metal salt (potassium hydroxide) 0.41, defoaming agent (XPC-30B) 0.01 and the balance of deionized water.
The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 47.5 parts by weight of polyether, 10 parts by weight of alkyl carboxylic acid and 20 parts by weight of polymethacrylate. The polymethacrylate has the kinematic viscosity at 40 ℃ of 800 cSt.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 13, a thermal management fluid, made from the following raw materials in parts by weight: ethylene glycol 65, phase-change material 2.1, anti-corrosion additive (the mass ratio of the tricarboxylic acid to the sebacic acid is 1: 2) 2.2, alkali metal salt (potassium hydroxide) 0.41, defoaming agent (XPC-30B) 0.01 and the balance of deionized water. The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 50 parts of polyether, 11.9 parts of alkyl carboxylic acid and 20 parts of polymethacrylate. The polymethacrylate has the kinematic viscosity of 400cSt at 40 ℃.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Example 14, a thermal management fluid, made from the following raw materials in parts by weight: ethylene glycol 51, a phase-change material 1.3, an anti-corrosion additive [ tricarboxylic acid: dicarboxylic acid (a mixture of azelaic acid: neo-diacid: glutaric acid in a mass ratio of 1:1: 1) ] in a mass ratio of 1:2]1.6, alkali metal salts (barium hydroxide) 0.47 and (potassium hydroxide) 0.05, an antifoaming agent (XPY-30) 0.01, and the balance deionized water. The tricarboxylic acid structure is:
the phase-change material of the embodiment is prepared from the following materials in proportion: 50 parts of polyether, 20 parts of alkyl carboxylic acid and 20 parts of polymethacrylate. The polymethacrylate has a kinematic viscosity of 3000cSt at 40 ℃.
The polyether structure is as follows:
alkyl carboxylic acid selection:
the preparation method of the phase-change material and the preparation method of the thermal management liquid refer to examples 1 to 3, and are not described herein again.
Comparative experiment:
1. corrosion test (using test method: ASTM D1384, unit: mg) in which: comparative example 1: basf G40-45, comparative example 2: great wall YC-45 cooling liquid; comparative example 3: basf FC G20 coolant.
According to analysis of glass corrosion experimental data, the product has a good protection effect on conventional metals such as red copper, brass, steel, iron, soldering tin and cast aluminum, and also has a good protection effect on unconventional metals such as zinc, nickel, aluminum (1024), aluminum (2011), aluminum (6060), aluminum (6063), aluminum (6061) and aluminum (6082).
2. Experiment of thermal conductivity
| Practice of Example 1 | Practice of Example 2 | Practice of Example 3 | Practice of Example 4 | Practice of Example 5 | Practice of Example 6 | Practice of Example 7 | Practice of Example 8 | Practice of Example 9 | Examples 10 | Examples 11 | Examples 12 | Examples 13 | Examples 14 | Comparison of Example 1 | Comparison of Example 2 | Comparison of Example 3 | |
| Heat conductivity (W- (m•K)） | 1.9 | 2.1 | 1.8 | 1.8 | 1.9 | 2.1 | 2.1 | 2.3 | 1.9 | 1.6 | 1.9 | 2.2 | 2.1 | 2.0 | 0.5 | 0.7 | 0.8 |
The product of the invention has better heat conductivity coefficient and heat storage performance due to the addition of the phase-change material, can lead out more heat of a thermal system, and has good heat transfer efficiency.
Claims (4)
1. The heat management liquid is characterized by being prepared from the following raw materials in parts by weight:
35-90 parts of ethylene glycol, 0.05-3 parts of phase change material, 0.01-5 parts of anti-corrosion additive, 0.2-0.55 part of alkali metal salt, 0.001-0.05 part of defoaming agent and the balance of deionized water;
the phase change material is composed of polyether, alkyl carboxylic acid and polymethacrylate, wherein the weight ratio of polyether: alkyl carboxylic acid: the weight ratio of the polymethacrylate is (4-5) to (1-2);
the polyether structure is as follows:
wherein m = 0-200, n = 0-200, m and n are not zero at the same time, R1Is hydrogen or C1~C30An alkane of (a); r2Is hydrogen or methyl, R3Is C2～C30An alkane of (a);
phase changeThe alkyl carboxylic acid in the material is selected from C5-C100A monocarboxylic acid, a dicarboxylic acid or a tricarboxylic acid;
the anti-corrosion additive is prepared from the following components in a mass ratio of 1:2, tricarboxylic acid and dicarboxylic acid;
the dicarboxylic acid in the anticorrosion additive comprises one or more of sebacic acid, azelaic acid, neo-diacid and glutaric acid;
the tricarboxylic acid in the corrosion inhibiting additive is:
wherein n is an integer from 0 to 100;
the phase-change material is prepared by the following steps: dissolving alkyl carboxylic acid in a mixed solution of deionized water and ethylene glycol, and performing ultrasonic treatment for 10-30 minutes to obtain a milky white solution 1; adding polymethacrylate into the solution 1, continuing to perform ultrasonic treatment for 20-50 minutes, and then continuing to stir for 5-20 minutes to obtain a solution 2; adding polyether into the solution 2 at the speed of 0.01-2.5 mL/min, continuously stirring, and after the polyether is added, continuously stirring for 20-30 min to obtain a solution 3; and filtering the solution 3, removing the mixed solution of the solvent deionized water and the glycol, and drying at 50-150 ℃ for 0.5-2 hours to obtain the phase change material.
2. The thermal management fluid of claim 1, wherein the alkali metal salt is: one or more of sodium hydroxide, potassium hydroxide, calcium hydroxide and barium hydroxide.
3. The thermal management fluid of claim 1, wherein said antifoaming agent is one or more of XP-14D, XP-S-129, XPY-30, XPC-30B.
4. A method of preparing a thermal management fluid according to any one of claims 1 to 3, comprising the steps of:
A. mixing the phase change material with 30-50% of glycol and all deionized water to form a solution 1 at 40-60 ℃;
B. mixing the rest glycol with the anti-corrosion additive and the alkali metal salt, stirring for 20-50 minutes to form a solution 2, and cooling to room temperature;
C. adding the solution 1 into the solution 2 at a speed of 0.01-3 mL/min, keeping the temperature of the solution 2 below 50 ℃, continuously stirring in the dropwise adding process, and forming a solution 3 after the dropwise adding is finished;
D. adding a defoaming agent into the solution 3, and stirring for 20-50 minutes; filtering to obtain the product.
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