Multi-performance rubber tube special for liquid cooling

Abstract

The invention relates to the technical field of rubber tube manufacturing, in particular to a multi-performance rubber tube special for liquid cooling, which is used for solving the problems that the existing rubber tube special for liquid cooling is poor in heat-conducting property, low in mechanical strength, insufficient in corrosion resistance and difficult to meet the requirements of a high-performance liquid cooling system. According to the preparation method, the reinforcing layer is added into the rubber tube, so that the mechanical property of the rubber tube can be improved, multifunctional composite boron nitride is used as a reinforcing filler of the rubber tube, the mechanical property of the rubber tube is further enhanced in the presence of the multifunctional composite boron nitride, and the rubber tube is endowed with excellent heat conduction, heat resistance and corrosion resistance; the comprehensive performance of the rubber pipe can be remarkably improved, so that the rubber pipe is particularly suitable for a cooling pipeline in a high-performance liquid cooling system and has a wide application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of rubber tube manufacturing, in particular to a multi-performance liquid cooling special rubber tube. Background Art

[0002] In the field of modern industry and science and technology, liquid cooling technology is widely used in electronic equipment, automobile engines, industrial machinery and other fields to effectively control temperature and improve the performance and reliability of equipment. As an important component of the liquid cooling system, the performance of the rubber hose directly affects the effect of the liquid cooling system. However, the existing rubber hose has some shortcomings during use. For example, the thermal conductivity is poor, which affects the heat dissipation efficiency of the liquid cooling system; the mechanical strength is low, and it is easy to be damaged during installation and use, and cannot meet the needs of some high-intensity liquid cooling systems; the corrosion resistance is insufficient, and it is easy to age and crack when in contact with the coolant for a long time.

[0003] Therefore, it is of great practical significance to develop a special rubber tube for liquid cooling with multiple properties. Summary of the invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a multi-performance liquid cooling special rubber tube, which solves the problem that the existing liquid cooling special rubber tube has poor thermal conductivity, low mechanical strength and insufficient corrosion resistance, and is difficult to meet the needs of high-performance liquid cooling systems.

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

[0006] A multi-functional liquid cooling special rubber tube, which includes three layers of structure from the inside to the outside: an inner rubber layer, a reinforcement layer and an outer rubber layer:

[0007] The multi-performance liquid cooling special rubber tube is prepared by the following steps:

[0008] Step 1: Weigh the raw materials of the inner rubber layer according to weight, specifically including: 70-80 parts of EPDM rubber, 8-16 parts of multifunctional composite boron nitride, 3-9 parts of nano silicon dioxide, 1-7 parts of barium sulfate, 2-5 parts of calcium stearate, 1-3 parts of sulfur and 0.5-1.1 parts of accelerator M;

[0009] Step 2: Add EPDM rubber, multifunctional composite boron nitride, nano silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer, mix for 20-30 minutes at a mixing temperature of 110-115°C, then put the mixed rubber into an extruder to extrude the inner rubber layer to obtain a rubber tube blank;

[0010] Step 3: Weaving the polyester fiber cords on the outer surface of the rubber tube blank with a weaving density of 80-100 cords / 10 cm to form a reinforcement layer to obtain a reinforced rubber tube blank;

[0011] Step 4: Weigh the outer rubber layer raw materials according to weight, specifically including: 40-60 parts of EPDM rubber, 4-10 parts of multifunctional composite boron nitride, 5-11 parts of aluminum oxide, 3-7 parts of talc, 2-4 parts of titanium dioxide, 1-5 parts of calcium stearate, 1-2 parts of sulfur and 0.4-0.8 parts of accelerator M;

[0012] Step 5: Add EPDM rubber, multifunctional composite boron nitride, aluminum oxide, talcum powder, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer, mix for 20-30 minutes at a mixing temperature of 130-135° C., then put the mixed rubber into an extruder and extrude it to the outer surface of the reinforced rubber tube blank to form an outer rubber layer to obtain a rubber tube rough tube;

[0013] Step 6: Place the thick rubber tube in a vulcanizer and vulcanize it for 30-40 minutes at a vulcanization temperature of 160-165°C to obtain a multi-performance liquid cooling special rubber tube.

[0014] As a further solution of the present invention: the thickness of the inner rubber layer is 3.5-3.7 mm; the thickness of the reinforcement layer is 0.5-1 mm; and the thickness of the outer rubber layer is 3.5-3.7 mm.

[0015] As a further solution of the present invention: the multifunctional composite boron nitride is prepared by the following steps:

[0016] Step s1: Add boron nitride, magnesium chloride hexahydrate, polyvinyl pyrrolidone, sodium metasilicate nonahydrate and deionized water into a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, introduce nitrogen protection, stir and react for 3-4 hours at a temperature of 25-30° C. and a stirring rate of 300-400 r / min. After the reaction is completed, place the reaction product in a freeze drying box, dry it at a temperature of -35° C. for 8-10 hours, and then place it in a muffle furnace, and calcine it at a temperature of 600-620° C. for 5-6 hours to obtain composite boron nitride;

[0017] Step s2: add triglycidyl isocyanurate, DOPO and N,N-dimethylacetamide into a three-necked flask equipped with a stirrer, a thermometer and an air duct, introduce nitrogen protection, stir and react for 30-40 minutes at a temperature of 25-30°C and a stirring rate of 300-400 r / min, then raise the temperature to 160-165°C and continue stirring and reacting for 3-4 hours. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, then wash with tetrahydrofuran and methanol 2-3 times in sequence, then place in a vacuum drying oven, and dry at a temperature of 50-55°C for 2-3 hours to obtain intermediate 1;

[0018] Step s3: Add intermediate 1, γ-aminoethylaminopropyltrimethoxysilane and N,N-dimethylacetamide to a three-necked flask equipped with a stirrer, a thermometer and an air duct, introduce nitrogen protection, stir the reaction at a temperature of 25-30°C and a stirring rate of 300-400r / min for 10-15min, then heat the temperature to 50-55°C and continue stirring the reaction for 10-15h. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, then wash with ethanol 2-3 times, then place in a vacuum drying oven, and dry at a temperature of 70-75°C for 2-3h to obtain intermediate 2;

[0019] Step s4: add the intermediate 2, 2,4-bis(trifluoromethyl)bromobenzene, anhydrous potassium carbonate and N,N-dimethylformamide to a three-necked flask equipped with a stirrer, a thermometer and an air duct, introduce nitrogen protection, stir the reaction at a temperature of 25-30°C and a stirring rate of 300-400r / min for 1-2h, then heat the temperature to 150-155°C and continue stirring the reaction for 6-8h. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, then wash with ethanol 2-3 times, then place in a vacuum drying oven, and dry at a temperature of 70-75°C for 2-3h to obtain a powder modifier;

[0020] Step s5: Add powder modifier, anhydrous ethanol and deionized water to a three-necked flask equipped with an agitator, a thermometer and an air duct, introduce nitrogen protection, stir and react for 30-40 minutes at a temperature of 25-30°C and a stirring rate of 300-400r / min, then add composite boron nitride and continue stirring and reacting for 8-10 hours at a temperature of 85-90°C. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is placed in a vacuum drying oven and dried at a temperature of 40-45°C for 8-10 hours to obtain multifunctional composite boron nitride.

[0021] As a further solution of the present invention: the usage ratio of the boron nitride, magnesium chloride hexahydrate, polyvinyl pyrrolidone, sodium metasilicate nonahydrate and deionized water in step s1 is 2g: 0.1-0.3g: 0.08-0.12g: 0.15-0.17g: 8-10mL.

[0022] As a further solution of the present invention: the boron nitride in step s1 is boron nitride powder with a particle size of 3-5 μm.

[0023] As a further solution of the present invention: the usage ratio of triglycidyl isocyanurate, DOPO and N,N-dimethylacetamide in step s2 is 10 mmol:10 mmol:30-40 mL.

[0024] As a further solution of the present invention: the usage ratio of the intermediate 1, γ-aminoethylaminopropyltrimethoxysilane and N,N-dimethylacetamide in step s3 is 10 mmol: 22-25 mmol: 50-55 mL.

[0025] As a further scheme of the present invention: the usage ratio of the intermediate 2, 2,4-bis(trifluoromethyl)bromobenzene, anhydrous potassium carbonate and N,N-dimethylformamide in step s4 is 10 mmol: 5-25 mmol: 30-40 mmol: 70-80 mL.

[0026] As a further solution of the present invention: the usage ratio of the powder modifier, anhydrous ethanol, deionized water and composite boron nitride in step s5 is 0.3-1.5g:40-45mL:4-5mL:1g.

[0027] Beneficial effects of the present invention:

[0028] The multi-functional liquid-cooling special rubber tube of the present invention comprises the following steps: adding EPDM rubber, multifunctional composite boron nitride, nano silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer for mixing, then putting the mixed rubber into an extruder for extruding an inner rubber layer to obtain a rubber tube blank, weaving polyester fiber cords on the outer surface of the rubber tube blank to form a reinforcing layer to obtain a reinforced rubber tube blank, adding EPDM rubber, multifunctional composite boron nitride, aluminum oxide, talcum powder, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer for mixing, then putting the mixed rubber into an extruder for extruding until the reinforcing layer is formed. The outer surface of the rubber tube blank is strengthened to form an outer rubber layer to obtain a rubber tube thick tube, and the rubber tube thick tube is placed in a vulcanizer for vulcanization to obtain a multi-performance liquid cooling special rubber tube; the preparation method can improve the mechanical properties of the rubber tube by adding a reinforcement layer to the rubber tube, and the multifunctional composite boron nitride is used as a reinforcing filler for the rubber tube. The presence of the multifunctional composite boron nitride further enhances the mechanical properties of the rubber tube, and gives the rubber tube excellent thermal conductivity, heat resistance and corrosion resistance, which can significantly improve the comprehensive performance of the rubber tube, making the rubber tube particularly suitable for cooling pipes in high-performance liquid cooling systems, and has broad application prospects.

[0029] In the process of preparing a multi-functional liquid cooling special rubber tube, a multifunctional composite boron nitride is first prepared. First, magnesium chloride hexahydrate is used as a raw material to composite magnesium oxide on the surface of boron nitride particles to obtain composite boron nitride. Then, triglycidyl isocyanurate and DOPO are reacted. Part of the epoxy groups on triglycidyl isocyanurate react with PH on DOPO to introduce the DOPO structure to obtain intermediate 1. Then, intermediate 1 and γ-aminoethylaminopropyltrimethoxysilane react. The epoxy group on intermediate 1 reacts with the amino group on γ-aminoethylaminopropyltrimethoxysilane to introduce a large number of siloxane groups to obtain intermediate 2. Then, intermediate 2 and 2,4-bis(trifluoromethyl)bromobenzene react. The hydroxyl group and the imino group on intermediate 2 react with the bromine atom on 2,4-bis(trifluoromethyl)bromobenzene. , a large number of CF bonds are introduced to obtain a powder modifier, and finally the powder modifier is used to modify the composite boron nitride to obtain a multifunctional composite boron nitride; the compatibility of the modified multifunctional composite boron nitride is greatly improved, so that it can be well dispersed in the rubber tube, evenly distributed and significantly improve the performance of the rubber tube, the presence of DOPO structure and CF bonds can significantly improve the high temperature resistance, corrosion resistance and flame retardant properties of the rubber tube, boron nitride has good mechanical properties and thermal conductivity, and can significantly improve the strength and thermal conductivity of the rubber tube, and after composite magnesium oxide, the spatial position synergy between different fillers can be utilized to construct a complex thermal conductivity network, further improving the thermal conductivity of the material, and the rubber tube finally prepared has excellent mechanical properties, temperature resistance and thermal conductivity, and corrosion resistance. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] This embodiment is a method for preparing a multi-functional liquid cooling special rubber tube, comprising the following steps:

[0033] Step S1: 2 g of boron nitride, 0.1 g of magnesium chloride hexahydrate, 0.08 g of polyvinyl pyrrolidone, 0.15 g of sodium metasilicate nonahydrate and 8 mL of deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The reaction is stirred for 3 h at a temperature of 25 ° C and a stirring rate of 300 r / min. After the reaction is completed, the reaction product is placed in a freeze drying box and dried at a temperature of -35 ° C for 8 h, and then placed in a muffle furnace and calcined at a temperature of 600 ° C for 5 h to obtain composite boron nitride;

[0034] Step S2: 10 mmol of triglycidyl isocyanurate, 10 mmol of DOPO and 30 mL of N,N-dimethylacetamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred at 25° C. and a stirring rate of 300 r / min for 30 min, and then the mixture was heated to 160° C. and the stirring reaction was continued for 3 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation. The mixture was then washed twice with tetrahydrofuran and methanol in sequence, and then placed in a vacuum drying oven and dried at 50° C. for 2 h to obtain intermediate 1;

[0035] Step S3: 10 mmol of intermediate 1, 22 mmol of γ-aminoethylaminopropyltrimethoxysilane and 50 mL of N,N-dimethylacetamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred at 25°C and a stirring rate of 300 r / min for 10 min, and then the mixture was heated to 50°C and stirred for 10 h. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation. The mixture was then washed twice with ethanol, and then placed in a vacuum drying oven and dried at 70°C for 2 h to obtain intermediate 2;

[0036] Step S4: 10mmol intermediate 2, 5mmol 2,4-bis(trifluoromethyl)bromobenzene, 30mmol anhydrous potassium carbonate and 70mL N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred at 25°C and a stirring rate of 300r / min for 1h, and then the mixture was heated to 150°C and continued to stir for 6h. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation. The mixture was then washed twice with ethanol, and then placed in a vacuum drying oven and dried at 70°C for 2h to obtain a powder modifier.

[0037] Step S5: 0.3 g of powder modifier, 40 mL of anhydrous ethanol and 4 mL of deionized water were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred for 30 min at a temperature of 25 ° C and a stirring rate of 300 r / min. Then, 1 g of composite boron nitride was added and the mixture was heated to 85 ° C and stirred for 8 h. After the reaction, the reaction product was cooled to room temperature and then centrifuged. The precipitate was placed in a vacuum drying oven and dried at a temperature of 40 ° C for 8 h to obtain a multifunctional composite boron nitride.

[0038] Step S6: weighing the raw materials for the inner rubber layer according to weight, specifically including: 70 parts of EPDM rubber, 8 parts of multifunctional composite boron nitride, 3 parts of nano-silicon dioxide, 1 part of barium sulfate, 2 parts of calcium stearate, 1 part of sulfur and 0.5 parts of accelerator M;

[0039] Step S7: adding EPDM rubber, multifunctional composite boron nitride, nano-silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 20 minutes at a mixing temperature of 110° C., then putting the mixed rubber into an extruder to extrude an inner rubber layer, controlling the thickness of the inner rubber layer to be 3.5 mm, and obtaining a rubber tube blank;

[0040] Step S8: weaving the polyester fiber cords on the outer surface of the rubber tube blank at a weaving density of 80 cords / 10 cm to form a reinforcement layer, and controlling the thickness of the reinforcement layer to be 0.5 mm to obtain a reinforced rubber tube blank;

[0041] Step S9: weighing the outer rubber layer raw materials according to weight, specifically including: 40 parts of EPDM rubber, 4 parts of multifunctional composite boron nitride, 5 parts of aluminum oxide, 3 parts of talc, 2 parts of titanium dioxide, 1 part of calcium stearate, 1 part of sulfur and 0.4 parts of accelerator M;

[0042] Step S10: adding EPDM rubber, multifunctional composite boron nitride, aluminum oxide, talcum powder, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 20 minutes at a mixing temperature of 130° C., then putting the mixed rubber into an extruder and extruding it onto the outer surface of the reinforced rubber tube blank to form an outer rubber layer, and controlling the thickness of the outer rubber layer to be 3.5 mm to obtain a rubber tube thick tube;

[0043] Step S11: placing the thick rubber tube in a vulcanizer, and vulcanizing it for 30 minutes at a vulcanizing temperature of 160° C. to obtain a multi-performance liquid cooling special rubber tube.

[0044] Embodiment 2:

[0045] This embodiment is a method for preparing a multi-functional liquid cooling special rubber tube, comprising the following steps:

[0046] Step S1: 2 g of boron nitride, 0.2 g of magnesium chloride hexahydrate, 0.1 g of polyvinyl pyrrolidone, 0.16 g of sodium metasilicate nonahydrate and 9 mL of deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The reaction is stirred for 3.5 h at a temperature of 28 ° C and a stirring rate of 350 r / min. After the reaction is completed, the reaction product is placed in a freeze drying box and dried at a temperature of -35 ° C for 9 h, and then placed in a muffle furnace and calcined at a temperature of 610 ° C for 5.5 h to obtain composite boron nitride;

[0047] Step S2: 10 mmol of triglycidyl isocyanurate, 10 mmol of DOPO and 35 mL of N,N-dimethylacetamide were added to a three-necked flask equipped with a stirrer, a thermometer and a gas duct, and nitrogen was introduced for protection. The mixture was stirred at 28° C. and a stirring rate of 350 r / min for 35 min, and then the mixture was heated to 162° C. and the stirring reaction was continued for 3.5 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation. The mixture was then washed twice with tetrahydrofuran and methanol in sequence, and then placed in a vacuum drying oven and dried at 52° C. for 2.5 h to obtain intermediate 1;

[0048] Step S3: 10 mmol of intermediate 1, 24 mmol of γ-aminoethylaminopropyltrimethoxysilane and 52 mL of N,N-dimethylacetamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred at 28° C. and a stirring rate of 350 r / min for 12 min, and then the mixture was heated to 52° C. and the stirring reaction was continued for 12 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then the mixture was washed twice with ethanol, and then placed in a vacuum drying oven and dried at 72° C. for 2.5 h to obtain intermediate 2;

[0049] Step S4: 10 mmol of intermediate 2, 15 mmol of 2,4-bis(trifluoromethyl)bromobenzene, 35 mmol of anhydrous potassium carbonate and 75 mL of N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred for reaction at 28° C. and a stirring rate of 350 r / min for 1.5 h, and then the mixture was heated to 152° C. and the stirring reaction was continued for 7 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then the mixture was washed twice with ethanol, and then placed in a vacuum drying oven and dried at 72° C. for 2.5 h to obtain a powder modifier;

[0050] Step S5: 0.9 g of powder modifier, 42 mL of anhydrous ethanol and 4.5 mL of deionized water were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred for 35 min at a temperature of 28 ° C and a stirring rate of 350 r / min. Then, 1 g of composite boron nitride was added and the mixture was heated to 88 ° C and continued to stir for 9 h. After the reaction was completed, the reaction product was cooled to room temperature and then centrifuged. The precipitate was placed in a vacuum drying oven and dried at a temperature of 42 ° C for 9 h to obtain a multifunctional composite boron nitride.

[0051] Step S6: weighing the raw materials for the inner rubber layer according to weight, specifically including: 75 parts of EPDM rubber, 12 parts of multifunctional composite boron nitride, 6 parts of nano silicon dioxide, 4 parts of barium sulfate, 3.5 parts of calcium stearate, 2 parts of sulfur and 0.8 parts of accelerator M;

[0052] Step S7: adding EPDM rubber, multifunctional composite boron nitride, nano-silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 25 minutes at a mixing temperature of 112° C., then putting the mixed rubber into an extruder to extrude an inner rubber layer, controlling the thickness of the inner rubber layer to be 3.6 mm, and obtaining a rubber tube blank;

[0053] Step S8: weaving the polyester fiber cords on the outer surface of the rubber tube blank at a weaving density of 90 cords / 10 cm to form a reinforcement layer, and controlling the thickness of the reinforcement layer to be 0.8 mm to obtain a reinforced rubber tube blank;

[0054] Step S9: weighing the outer rubber layer raw materials according to weight, specifically including: 50 parts of EPDM rubber, 7 parts of multifunctional composite boron nitride, 8 parts of aluminum oxide, 5 parts of talc, 3 parts of titanium dioxide, 3 parts of calcium stearate, 1.5 parts of sulfur and 0.6 parts of accelerator M;

[0055] Step S10: adding EPDM rubber, multifunctional composite boron nitride, aluminum oxide, talcum powder, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 25 minutes at a mixing temperature of 132° C., then putting the mixed rubber into an extruder and extruding it onto the outer surface of the reinforced rubber tube blank to form an outer rubber layer, and controlling the thickness of the outer rubber layer to be 3.6 mm to obtain a rubber tube thick tube;

[0056] Step S11: placing the thick rubber tube in a vulcanizer, and vulcanizing it for 35 minutes at a vulcanizing temperature of 162° C. to obtain a multi-performance liquid cooling special rubber tube.

[0057] Embodiment 3:

[0058] This embodiment is a method for preparing a multi-functional liquid cooling special rubber tube, comprising the following steps:

[0059] Step S1: 2 g of boron nitride, 0.3 g of magnesium chloride hexahydrate, 0.12 g of polyvinyl pyrrolidone, 0.17 g of sodium metasilicate nonahydrate and 10 mL of deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The reaction is stirred for 4 hours at a temperature of 30° C. and a stirring rate of 400 r / min. After the reaction is completed, the reaction product is placed in a freeze drying box and dried at a temperature of -35° C. for 10 hours, and then placed in a muffle furnace and calcined at a temperature of 620° C. for 6 hours to obtain composite boron nitride;

[0060] Step S2: 10 mmol of triglycidyl isocyanurate, 10 mmol of DOPO and 40 mL of N,N-dimethylacetamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen was introduced for protection. The mixture was stirred at 30° C. and a stirring rate of 400 r / min for 40 min, and then the mixture was heated to 165° C. and stirred for 4 h. After the reaction, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation. The mixture was then washed with tetrahydrofuran and methanol for 3 times in sequence, and then placed in a vacuum drying oven and dried at 55° C. for 3 h to obtain intermediate 1;

[0061] Step S3: 10 mmol of intermediate 1, 25 mmol of γ-aminoethylaminopropyltrimethoxysilane and 55 mL of N,N-dimethylacetamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred at 30° C. and a stirring rate of 400 r / min for 15 min, and then the mixture was heated to 55° C. and the stirring reaction was continued for 15 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then the mixture was washed with ethanol 3 times, and then placed in a vacuum drying oven and dried at 75° C. for 3 h to obtain intermediate 2;

[0062] Step S4: 10 mmol of intermediate 2, 25 mmol of 2,4-bis(trifluoromethyl)bromobenzene, 40 mmol of anhydrous potassium carbonate and 80 mL of N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred at 30° C. and a stirring rate of 400 r / min for 2 h, and then the mixture was heated to 155° C. and the stirring reaction was continued for 8 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then the mixture was washed with ethanol 3 times, and then placed in a vacuum drying oven and dried at 75° C. for 3 h to obtain a powder modifier;

[0063] Step S5: 1.5 g of powder modifier, 45 mL of anhydrous ethanol and 5 mL of deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The reaction is stirred for 40 min at a temperature of 30° C. and a stirring rate of 400 r / min. Then, 1 g of composite boron nitride is added and the temperature is raised to 90° C. and the stirring reaction is continued for 10 h. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is placed in a vacuum drying oven and dried at a temperature of 45° C. for 10 h to obtain a multifunctional composite boron nitride;

[0064] Step S6: weigh the raw materials of the inner rubber layer according to weight parts, specifically including: 80 parts of EPDM rubber, 16 parts of multifunctional composite boron nitride, 9 parts of nano silicon dioxide, 7 parts of barium sulfate, 5 parts of calcium stearate, 3 parts of sulfur and 1.1 parts of accelerator M;

[0065] Step S7: adding EPDM rubber, multifunctional composite boron nitride, nano-silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 30 minutes at a mixing temperature of 115° C., then putting the mixed rubber into an extruder to extrude an inner rubber layer, controlling the thickness of the inner rubber layer to be 3.7 mm, and obtaining a rubber tube blank;

[0066] Step S8: weaving the polyester fiber cords on the outer surface of the rubber tube blank at a weaving density of 100 cords / 10 cm to form a reinforcement layer, and controlling the thickness of the reinforcement layer to be 1 mm to obtain a reinforced rubber tube blank;

[0067] Step S9: weighing the outer rubber layer raw materials according to weight, specifically including: 60 parts of EPDM rubber, 10 parts of multifunctional composite boron nitride, 11 parts of aluminum oxide, 7 parts of talc, 4 parts of titanium dioxide, 5 parts of calcium stearate, 2 parts of sulfur and 0.8 parts of accelerator M;

[0068] Step S10: adding EPDM rubber, multifunctional composite boron nitride, aluminum oxide, talcum powder, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 30 minutes at a mixing temperature of 135° C., then putting the mixed rubber into an extruder and extruding it onto the outer surface of the reinforced rubber tube blank to form an outer rubber layer, and controlling the thickness of the outer rubber layer to be 3.7 mm to obtain a rubber tube thick tube;

[0069] Step S11: placing the thick rubber tube in a vulcanizer, and vulcanizing it for 40 minutes at a vulcanizing temperature of 165° C. to obtain a multi-performance liquid cooling special rubber tube.

[0070] Comparative Example 1:

[0071] This comparative example is a method for preparing a multi-performance liquid cooling special rubber tube, comprising the following steps:

[0072] Step S1: weigh the raw materials of the inner rubber layer according to weight parts, specifically including: 80 parts of EPDM rubber, 9 parts of nano-silicon dioxide, 7 parts of barium sulfate, 5 parts of calcium stearate, 3 parts of sulfur and 1.1 parts of accelerator M;

[0073] Step S2: adding EPDM rubber, nano-silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 30 minutes at a mixing temperature of 115° C., then putting the mixed rubber into an extruder to extrude an inner rubber layer, controlling the thickness of the inner rubber layer to be 3.7 mm, and obtaining a rubber tube blank;

[0074] Step S3: weaving polyester fiber cords on the outer surface of the rubber tube blank at a weaving density of 100 cords / 10 cm to form a reinforcement layer, and controlling the thickness of the reinforcement layer to be 1 mm to obtain a reinforced rubber tube blank;

[0075] Step S4: weighing the outer rubber layer raw materials according to weight, specifically including: 60 parts of EPDM rubber, 11 parts of aluminum oxide, 7 parts of talcum powder, 4 parts of titanium dioxide, 5 parts of calcium stearate, 2 parts of sulfur and 0.8 parts of accelerator M;

[0076] Step S5: adding EPDM rubber, aluminum oxide, talc, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 30 minutes at a mixing temperature of 135° C., then putting the mixed rubber into an extruder and extruding it onto the outer surface of the reinforced rubber tube blank to form an outer rubber layer, and controlling the thickness of the outer rubber layer to be 3.7 mm to obtain a rubber tube thick tube;

[0077] Step S6: placing the thick rubber tube in a vulcanizer, and vulcanizing it for 40 minutes at a vulcanizing temperature of 165° C. to obtain a multi-performance liquid cooling special rubber tube.

[0078] Comparative Example 2:

[0079] This comparative example is a method for preparing a multi-performance liquid cooling special rubber tube, comprising the following steps:

[0080] Step S1: weigh the raw materials of the inner rubber layer according to weight, specifically including: 80 parts of EPDM rubber, 16 parts of boron nitride, 9 parts of nano-silicon dioxide, 7 parts of barium sulfate, 5 parts of calcium stearate, 3 parts of sulfur and 1.1 parts of accelerator M;

[0081] Step S2: adding EPDM rubber, boron nitride, nano-silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 30 minutes at a mixing temperature of 115° C., then putting the mixed rubber into an extruder to extrude an inner rubber layer, controlling the thickness of the inner rubber layer to be 3.7 mm, and obtaining a rubber tube blank;

[0082] Step S3: weaving polyester fiber cords on the outer surface of the rubber tube blank at a weaving density of 100 cords / 10 cm to form a reinforcement layer, and controlling the thickness of the reinforcement layer to be 1 mm to obtain a reinforced rubber tube blank;

[0083] Step S4: weighing the outer rubber layer raw materials according to weight, specifically including: 60 parts of EPDM rubber, 10 parts of boron nitride, 11 parts of aluminum oxide, 7 parts of talc, 4 parts of titanium dioxide, 5 parts of calcium stearate, 2 parts of sulfur and 0.8 parts of accelerator M;

[0084] Step S5: adding EPDM rubber, boron nitride, aluminum oxide, talc, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer, mixing for 30 minutes at a mixing temperature of 135° C., then putting the mixed rubber into an extruder and extruding it onto the outer surface of the reinforced rubber tube blank to form an outer rubber layer, and controlling the thickness of the outer rubber layer to be 3.7 mm to obtain a rubber tube thick tube;

[0085] Step S6: placing the thick rubber tube in a vulcanizer, and vulcanizing it for 40 minutes at a vulcanizing temperature of 165° C. to obtain a multi-performance liquid cooling special rubber tube.

[0086] The multi-performance liquid cooling special rubber tubes of Examples 1-3 and Comparative Examples 1-2 with an inner diameter of 38 mm were subjected to performance tests, and the test results are shown in the following table:

[0087] sample Tensile strength, MPa Elongation at break, % Tear strength, KN / m Thermal conductivity, W (m·K) Example 1 12.6 420 35.8 1.56 Example 2 12.8 432 36.9 1.59 Example 3 13.1 445 38.1 1.63 Comparative Example 1 10.3 296 28.7 0.45 Comparative Example 2 11.9 376 32.1 1.19

[0088] Referring to the data in the above table, based on the comparison between Examples 1-3 and Comparative Examples 1-2, it can be seen that adding multifunctional composite boron nitride can give the multi-performance liquid cooling special rubber tube excellent mechanical properties and thermal conductivity.

[0089] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0090] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A multi-functional liquid cooling special rubber hose, characterized in that: From inside to outside, it includes three layers: inner rubber layer, reinforcement layer and outer rubber layer: The multi-performance liquid cooling special rubber tube is prepared by the following steps: Step 1: Weigh the raw materials of the inner rubber layer according to weight, specifically including: 70-80 parts of EPDM rubber, 8-16 parts of multifunctional composite boron nitride, 3-9 parts of nano silicon dioxide, 1-7 parts of barium sulfate, 2-5 parts of calcium stearate, 1-3 parts of sulfur and 0.5-1.1 parts of accelerator M; Step 2: Add EPDM rubber, multifunctional composite boron nitride, nano silicon dioxide, barium sulfate, calcium stearate, sulfur and accelerator M into an internal mixer, mix for 20-30 minutes at a mixing temperature of 110-115°C, then put the mixed rubber into an extruder to extrude the inner rubber layer to obtain a rubber tube blank; Step 3: Weaving the polyester fiber cords on the outer surface of the rubber tube blank with a weaving density of 80-100 cords / 10 cm to form a reinforcement layer to obtain a reinforced rubber tube blank; Step 4: Weigh the outer rubber layer raw materials according to weight, specifically including: 40-60 parts of EPDM rubber, 4-10 parts of multifunctional composite boron nitride, 5-11 parts of aluminum oxide, 3-7 parts of talc, 2-4 parts of titanium dioxide, 1-5 parts of calcium stearate, 1-2 parts of sulfur and 0.4-0.8 parts of accelerator M; Step 5: Add EPDM rubber, multifunctional composite boron nitride, aluminum oxide, talcum powder, titanium dioxide, calcium stearate, sulfur and accelerator M into an internal mixer, mix for 20-30 minutes at a mixing temperature of 130-135° C., then put the mixed rubber into an extruder and extrude it to the outer surface of the reinforced rubber tube blank to form an outer rubber layer to obtain a rubber tube rough tube; Step 6: Place the thick rubber tube in a vulcanizer and vulcanize it for 30-40 minutes at a vulcanization temperature of 160-165°C to obtain a multi-performance liquid cooling special rubber tube.

2. A multi-functional liquid cooling special rubber tube according to claim 1, characterized in that: The thickness of the inner rubber layer is 3.5-3.7 mm; the thickness of the reinforcement layer is 0.5-1 mm; and the thickness of the outer rubber layer is 3.5-3.7 mm.

3. The multi-functional liquid cooling special rubber tube according to claim 1, characterized in that: The multifunctional composite boron nitride is prepared by the following steps: Step s1: Add boron nitride, magnesium chloride hexahydrate, polyvinyl pyrrolidone, sodium metasilicate nonahydrate and deionized water into a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, introduce nitrogen protection, stir and react for 3-4 hours at a temperature of 25-30° C. and a stirring rate of 300-400 r / min. After the reaction is completed, place the reaction product in a freeze drying box, dry it at a temperature of -35° C. for 8-10 hours, and then place it in a muffle furnace, and calcine it at a temperature of 600-620° C. for 5-6 hours to obtain composite boron nitride; Step s2: add triglycidyl isocyanurate, DOPO and N,N-dimethylacetamide into a three-necked flask equipped with a stirrer, a thermometer and an air duct, introduce nitrogen protection, stir and react for 30-40 minutes at a temperature of 25-30°C and a stirring rate of 300-400 r / min, then raise the temperature to 160-165°C and continue stirring and reacting for 3-4 hours. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, then wash with tetrahydrofuran and methanol 2-3 times in sequence, then place in a vacuum drying oven, and dry at a temperature of 50-55°C for 2-3 hours to obtain intermediate 1; Step s3: Add intermediate 1, γ-aminoethylaminopropyltrimethoxysilane and N,N-dimethylacetamide to a three-necked flask equipped with a stirrer, a thermometer and an air duct, introduce nitrogen protection, stir the reaction at a temperature of 25-30°C and a stirring rate of 300-400r / min for 10-15min, then heat the temperature to 50-55°C and continue stirring the reaction for 10-15h. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, then wash with ethanol 2-3 times, then place in a vacuum drying oven, and dry at a temperature of 70-75°C for 2-3h to obtain intermediate 2; Step s4: add the intermediate 2, 2,4-bis(trifluoromethyl)bromobenzene, anhydrous potassium carbonate and N,N-dimethylformamide to a three-necked flask equipped with a stirrer, a thermometer and an air duct, introduce nitrogen protection, stir the reaction at a temperature of 25-30°C and a stirring rate of 300-400r / min for 1-2h, then heat the temperature to 150-155°C and continue stirring the reaction for 6-8h. After the reaction is completed, cool the reaction product to room temperature, then rotary evaporate to remove the solvent, then wash with ethanol 2-3 times, then place in a vacuum drying oven, and dry at a temperature of 70-75°C for 2-3h to obtain a powder modifier; Step s5: Add powder modifier, anhydrous ethanol and deionized water to a three-necked flask equipped with an agitator, a thermometer and an air duct, introduce nitrogen protection, stir and react for 30-40 minutes at a temperature of 25-30°C and a stirring rate of 300-400r / min, then add composite boron nitride and continue stirring and reacting for 8-10 hours at a temperature of 85-90°C. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is placed in a vacuum drying oven and dried at a temperature of 40-45°C for 8-10 hours to obtain multifunctional composite boron nitride.

4. The multi-functional liquid cooling special rubber tube according to claim 3, characterized in that: The usage ratio of the boron nitride, magnesium chloride hexahydrate, polyvinyl pyrrolidone, sodium metasilicate nonahydrate and deionized water in step s1 is 2g: 0.1-0.3g: 0.08-0.12g: 0.15-0.17g: 8-10mL.

5. The multi-functional liquid cooling special rubber tube according to claim 3, characterized in that: The boron nitride in step s1 is boron nitride powder with a particle size of 3-5 μm.

6. The multi-functional liquid cooling special rubber tube according to claim 3, characterized in that: The usage ratio of triglycidyl isocyanurate, DOPO and N,N-dimethylacetamide in step s2 is 10mmol:10mmol:30-40mL.

7. The multi-functional liquid cooling special rubber tube according to claim 3, characterized in that: The usage ratio of the intermediate 1, γ-aminoethylaminopropyltrimethoxysilane and N,N-dimethylacetamide in step s3 is 10 mmol: 22-25 mmol: 50-55 mL.

8. The multi-functional liquid cooling special rubber tube according to claim 3, characterized in that: The usage ratio of the intermediate 2, 2,4-bis(trifluoromethyl)bromobenzene, anhydrous potassium carbonate and N,N-dimethylformamide in step s4 is 10 mmol: 5-25 mmol: 30-40 mmol: 70-80 mL.

9. The multi-functional liquid cooling special rubber tube according to claim 3, characterized in that: The dosage ratio of the powder modifier, anhydrous ethanol, deionized water and composite boron nitride in step s5 is 0.3-1.5g:40-45mL:4-5mL:1g.