Rubber material for motorcycle engine rubber tube and preparation method of rubber material
By using fluoroelastomer, polyethersulfone-boron nitride composite materials and nanomontmorillonite and other raw materials, an alternating stacking structure is formed, which solves the aging problem of traditional rubber tubes at high and low temperatures, and improves the oil resistance of motorcycle engine hoses and mechanical strength extends service life.
Patent Information
- Application Number
- CN202411077194.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2024-12-17
AI Technical Summary
Traditional rubber tubes are prone to thermal oxygen aging and low-temperature brittleness under high temperature, high pressure and mineral oil conditions, resulting in cracking and affecting service life.
Using fluoroelastomer, polyethersulfone-boron nitride composite materials and nanomontmorillonite, an alternating stacking structure is formed through specific mixing and treatment methods to enhance the mechanical properties and oxidative stability of the material, and the anti-aging agent and vulcanizing agent are added to Improve heat resistance and cross-linking density.
It significantly improves the high and low temperature performance and chemical corrosion performance of the rubber, extends the service life, and enhances the oil resistance and mechanical strength of the motorcycle engine hose.
Smart Images
Figure BDA0004982662370000061 
Figure BDA0004982662370000071
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of rubber materials, and in particular to a rubber compound for a motorcycle engine hose and a preparation method thereof. Background Art
[0002] Motorcycle engine hoses play a vital role in modern motorcycles. Their main function is to transport fuel, lubricating oil and coolant. Therefore, the hose material must have excellent oil resistance, physical and mechanical properties, and high and low temperature resistance. However, traditional rubber hoses are prone to thermal oxidation aging when used for a long time under high temperature, high pressure and mineral oil conditions. Thermal oxidation aging is a free radical chain autocatalytic oxidation reaction, as well as low temperature brittleness, which leads to cracking of rubber hoses, affecting the service life of the hoses and is not conducive to the scientific development pursuit of safety, energy saving and environmental protection. Summary of the invention
[0003] Technical problem to be solved: In order to overcome the above shortcomings, a rubber material for a motorcycle engine hose and a preparation method thereof are provided.
[0004] The technical solution is: a rubber material for motorcycle engine hose, which is made of the following raw materials in parts by weight: 50-70 parts of fluororubber (FKM), 30-50 parts of polyethersulfone-boron nitride (PES-BN) composite material, 15-20 parts of nano-montmorillonite, 5-8 parts of plasticizer, 3-5 parts of vulcanizer, 1-2 parts of antioxidant, and 1.5-3 parts of accelerator.
[0005] Preferably, the preparation method of the polyethersulfone-boron nitride composite material comprises the following steps:
[0006] S1) Boron nitride powder and ammonium bicarbonate are mixed in a container at a mass ratio of 1:2, and an appropriate amount of deionized water is added and stirred evenly.
[0007] S2) heating the mixture in the container at 110-120° C. for 2-3 hours to decompose the ammonium bicarbonate to generate CO2 and NH3 gases, which are intercalated between the h-BN layers to obtain a pre-expanded boron nitride suspension.
[0008] S3) Take another container, add PES powder into dimethylformamide (DMF), stir and heat to 80°C until PES is completely dissolved to obtain a uniform PES solution.
[0009] S4) slowly adding the pre-expanded boron nitride suspension into the PES solution and ultrasonically treating for 2-3 hours to ensure that the boron nitride is evenly dispersed in the PES solution.
[0010] S5) placing the mixed solution in a vacuum drying oven and drying it at 60° C. for more than 24 hours to completely evaporate the solvent and gas impurities, and then grinding to obtain a PES-BN composite material.
[0011] Preferably, the mass ratio of polyethersulfone to boron nitride is 5-6:1-3.
[0012] Preferably, the plasticizer is dioctyl phthalate or trioctyl phosphate.
[0013] Preferably, the vulcanizing agent is sulfur (S).
[0014] Preferably, the antioxidant is 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD) or 2-mercaptobenzimidazole (MB).
[0015] Preferably, the accelerator is a mixture of any one or more of BZ-80, M-80, TRA-70, and ZBEC-70.
[0016] The present invention also provides a method for preparing a rubber material for a motorcycle engine hose, comprising the following steps:
[0017] 1) First stage mixing: Add fluororubber (FKM) and polyethersulfone-boron nitride (PES-BN) nanocomposite materials into an internal mixer and mix for 60 seconds to achieve preliminary uniform mixing.
[0018] Gradually add nano-montmorillonite and plasticizer and continue mixing for 3-5 minutes to ensure that the filler and plasticizer are evenly dispersed in the base material.
[0019] Add the antioxidant and continue mixing for 2-3 minutes to ensure that the antioxidant is evenly distributed; cut the evenly mixed rubber into sheets for later use.
[0020] 2) Second stage mixing: Preheat the mixing mill to 50-60°C and adjust the roller distance to an appropriate width.
[0021] Add the rubber material after the first stage of mixing into the open mixer for preliminary mixing.
[0022] Gradually add the vulcanizer and accelerator and continue mixing for 3-5 minutes to ensure that the vulcanizer and accelerator are evenly distributed.
[0023] Gradually adjust the roller distance and make thin passes 3-8 times to ensure uniform mixing of the rubber.
[0024] The roller distance is adjusted to the sheet thickness, and the sheet is rapidly cooled by air or water after being produced, and is parked for more than 8 hours to eliminate internal stress; and the rubber material for the engine hose is obtained.
[0025] Beneficial effects: 1. During the mixing process, fluororubber (FKM) as a matrix material provides good processing performance. Polyethersulfone has a rigid benzene ring, flexible sulfone group and ether group. By evenly dispersing the expanded nano-boron nitride in the polyethersulfone resin, an interlayer gap structure is formed. Nano-montmorillonite has a layered structure, which facilitates the further insertion of nano-montmorillonite into the interlayer of the polyethersulfone-boron nitride composite material during the mixing process to form a uniform composite structure. At the same time, nano-montmorillonite can also form uniformly dispersed nanosheets in the fluororubber matrix, and the three overlap to form an alternating stacking structure; the alternating stacking system formed makes the composite rubber have high mechanical properties and oxidation stability, and good temperature resistance and chemical corrosion resistance, further improving the comprehensive performance of the prepared composite rubber.
[0026] 2. The addition of antioxidants delays the aging process of the material and enhances its heat resistance and oxidation resistance. The combination of vulcanizers and accelerators improves the efficiency of the vulcanization reaction and ensures the cross-linking density and final performance of the material. DETAILED DESCRIPTION
[0027] The present invention is described in detail below with reference to specific embodiments, but is not intended to limit the present invention.
[0028] A rubber compound for a motorcycle engine hose is prepared from the following raw materials in parts by weight: 50-70 parts of fluororubber (FKM), 30-50 parts of polyethersulfone-boron nitride (PES-BN) composite material, 15-20 parts of nano-montmorillonite, 5-8 parts of plasticizer, 3-5 parts of vulcanizer, 1-2 parts of antioxidant and 1.5-3 parts of accelerator.
[0029] Fluororubber has excellent oil resistance and chemical resistance and can resist corrosion from various fuels and lubricants.
[0030] Polyethersulfone-boron nitride (PES-BN) composite materials can improve the heat resistance and thermal conductivity of the mixed rubber, so that the hose can still maintain good performance in high temperature environment.
[0031] Nano-montmorillonite, as a filler, significantly enhances the mechanical strength and stability of the material.
[0032] Due to the interaction of fluororubber, polyethersulfone-boron nitride and nano-montmorillonite during the mixing process, the three overlap with each other to form an alternating stacking structure; the formed alternating stacking system makes the composite rubber have high mechanical properties and oxidation stability, and good temperature resistance and chemical corrosion resistance, further improving the performance of the prepared composite rubber.
[0033] In a specific implementation process, the preparation method of the polyethersulfone-boron nitride composite material comprises the following steps:
[0034] S1) Boron nitride powder and ammonium bicarbonate are mixed in a container at a mass ratio of 1:2, and an appropriate amount of deionized water is added and stirred evenly.
[0035] S2) heating the mixture in the container at 110-120° C. for 2-3 hours to decompose the ammonium bicarbonate to generate CO2 and NH3 gases, which are intercalated between the h-BN layers to obtain a pre-expanded boron nitride suspension.
[0036] S3) Take another container, add PES powder into dimethylformamide (DMF), stir and heat to 80°C until PES is completely dissolved to obtain a uniform PES solution.
[0037] S4) slowly adding the pre-expanded boron nitride suspension into the PES solution and ultrasonically treating for 2-3 hours to ensure that the boron nitride is evenly dispersed in the PES solution.
[0038] S5) placing the mixed solution in a vacuum drying oven and drying it at 60° C. for more than 24 hours to completely evaporate the solvent and gas impurities, and then grinding to obtain a PES-BN composite material.
[0039] In a specific implementation process, the mass ratio of the polyethersulfone to boron nitride is 5-6:1-3.
[0040] In the specific implementation process, the plasticizer is dioctyl phthalate or trioctyl phosphate, which effectively improves the flexibility and processing performance of the material.
[0041] In the specific implementation process, the vulcanizing agent is sulfur (S). Sulfur, as a traditional vulcanization crosslinking agent, realizes the crosslinking of rubber by forming sulfur bridge bonds.
[0042] In a specific implementation process, the antioxidant is 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD) or 2-mercaptobenzimidazole (MB).
[0043] In the specific implementation process, the accelerator is a mixture of any one or more of BZ-80, M-80, TRA-70, and ZBEC-70.
[0044] The present invention also provides a method for preparing a rubber material for a motorcycle engine hose, comprising the following steps:
[0045] 1) First stage mixing: Add fluororubber (FKM) and polyethersulfone-boron nitride (PES-BN) nanocomposite materials into an internal mixer and mix for 60 seconds to achieve preliminary uniform mixing.
[0046] Gradually add nano-montmorillonite and plasticizer and continue mixing for 3-5 minutes to ensure that the filler and plasticizer are evenly dispersed in the base material.
[0047] Add the antioxidant and continue mixing for 2-3 minutes to ensure that the antioxidant is evenly distributed; cut the evenly mixed rubber into sheets for later use.
[0048] 2) Second stage mixing: Preheat the mixing mill to 50-60°C and adjust the roller distance to an appropriate width.
[0049] Add the rubber material after the first stage of mixing into the open mixer for preliminary mixing.
[0050] Gradually add the vulcanizer and accelerator and continue mixing for 3-5 minutes to ensure that the vulcanizer and accelerator are evenly distributed.
[0051] Gradually adjust the roller distance and make thin passes 3-8 times to ensure uniform mixing of the rubber.
[0052] The roller distance is adjusted to the sheet thickness, and the sheet is rapidly cooled by air or water after being produced, and is parked for more than 8 hours to eliminate internal stress; and the rubber material for the engine hose is obtained.
[0053] Example 1
[0054] A rubber compound for a motorcycle engine hose, the raw material composition ratio is shown in Table 1.
[0055] Example 2
[0056] A rubber compound for a motorcycle engine hose, the raw material composition ratio is shown in Table 1.
[0057] Example 3
[0058] A rubber compound for a motorcycle engine hose, the raw material composition ratio is shown in Table 1.
[0059] Example 4
[0060] A rubber compound for a motorcycle engine hose, the raw material composition ratio is shown in Table 1.
[0061] Comparative Example 1
[0062] A rubber compound for motorcycle engine hose, the raw material composition ratio is shown in Table 1. The only difference from Example 1 is that polyethersulfone resin is used instead of polyethersulfone-boron nitride composite material.
[0063] Comparative Example 2
[0064] A rubber compound for a motorcycle engine hose, the raw material composition ratio is shown in Table 1. The only difference from Example 1 is that no nano-montmorillonite is added.
[0065]
[0066] Trial plan
[0067] According to the schemes of Examples 1-4 and Comparative Examples 1-2 shown in Table 1 above, the schemes for testing and evaluating the physical properties of the rubber material for the engine hose prepared are as follows:
[0068] Hardness test: Use ShoreA hardness tester to measure the hardness of the rubber, the range is between 70-80ShoreA.
[0069] Tensile strength and elongation at break test: Tensile test is carried out under standard conditions to measure tensile strength (≥8MPa) and elongation at break (≥250%)
[0070] Hot air aging test: Aging at 135°C for 168 hours, measuring the change rate of tensile strength and elongation, and the change rate is required to be within ±25%.
[0071] Low temperature brittleness test: Keep at -40℃ for 3 minutes and check whether the sample has cracks. No cracks are required.
[0072] Table 2 Physical performance parameters of the rubber materials prepared in Examples 1-4 and Comparative Examples 1-2
[0073]
[0074] Combined with the data analysis in Table 2 above, it can be seen that the rubber materials of Examples 1-4 all show excellent performance in terms of hardness, tensile strength, elongation at break, etc. This shows that the rubber materials of the examples have higher tensile strength, ductility and toughness; and can withstand greater tensile stress. At the same time, under high temperature aging conditions, hot air aging and low temperature brittleness are significantly better than those of Comparative Examples 1-2, indicating that the rubber materials of the examples have excellent high and low temperature resistance under high and low temperature environments.
[0075] Specifically, the rubber materials of Examples 1-4, under the interaction of fluororubber, polyethersulfone-boron nitride and nano-montmorillonite during the mixing process, form an alternating stacking system so that the composite rubber materials have high mechanical properties and oxidation stability, and good temperature resistance and chemical corrosion resistance, further improving the performance of the prepared composite rubber materials. It is very suitable as a material for motorcycle engine hoses.
[0076] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.
Claims
1. A rubber compound for a motorcycle engine hose, characterized in that: The invention is made of the following raw materials in parts by weight: 50-70 parts of fluororubber (FKM), 30-50 parts of polyethersulfone-boron nitride (PES-BN) composite material, 15-20 parts of nano-montmorillonite, 5-8 parts of plasticizer, 3-5 parts of vulcanizer, 1-2 parts of antioxidant and 1.5-3 parts of accelerator.
2. The rubber compound for motorcycle engine hose according to claim 1, characterized in that: The preparation method of the polyethersulfone-boron nitride composite material comprises the following steps: S1) mixing boron nitride powder and ammonium bicarbonate in a container at a mass ratio of 1:2, adding an appropriate amount of deionized water, and stirring evenly; S2) heating the mixture in the container at 110-120° C. for 2-3 hours to decompose the ammonium bicarbonate to generate CO2 and NH3 gases, which are intercalated between the h-BN layers to obtain a pre-expanded boron nitride suspension; S3) taking another container, adding PES powder into dimethylformamide (DMF), stirring and heating to 80°C until PES is completely dissolved to obtain a uniform PES solution; S4) slowly adding the pre-expanded boron nitride suspension into the PES solution and ultrasonically treating for 2-3 hours to ensure that the boron nitride is evenly dispersed in the PES solution; S5) placing the mixed solution in a vacuum drying oven and drying it at 60° C. for more than 24 hours to completely evaporate the solvent and gas impurities, and then grinding to obtain a PES-BN composite material.
3. The rubber compound for motorcycle engine hose according to claim 2, characterized in that: The mass ratio of the polyethersulfone to boron nitride is 5-6:1-3.
4. The rubber compound for motorcycle engine hose according to claim 1, characterized in that: The plasticizer is dioctyl phthalate or trioctyl phosphate.
5. The rubber compound for motorcycle engine hose according to claim 1, characterized in that: The vulcanizing agent is sulfur.
6. The rubber compound for motorcycle engine hose according to claim 1, characterized in that: The antioxidant is 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD) or 2-mercaptobenzimidazole (MB); the accelerator is any one or more of BZ-80, M-80, TRA-70 and ZBEC-70.
7. A method for preparing a rubber compound for a motorcycle engine hose according to claims 1-6, characterized in that: The following steps are involved: 1) First stage mixing: adding fluororubber (FKM) and polyethersulfone-boron nitride (PES-BN) nanocomposite materials into an internal mixer and mixing for 60 seconds to achieve preliminary mixing; Gradually add nano-montmorillonite and plasticizer, and continue mixing for 3-5 minutes to ensure that the filler and plasticizer are evenly dispersed in the base material; Add the antioxidant and continue mixing for 2-3 minutes to make the antioxidant evenly distributed; cut the evenly mixed rubber into sheets for later use; 2) Second stage mixing: preheat the mixing mill to 50-60°C and adjust the roller distance to an appropriate width; Add the rubber compound after the first stage of mixing into the open mixer for preliminary mixing; Gradually add the vulcanizer and accelerator and continue mixing for 3-5 minutes to ensure that the vulcanizer and accelerator are evenly distributed; Gradually adjust the roller distance and make thin passes 3-8 times to ensure that the rubber is evenly mixed; The roller distance is adjusted to the sheet thickness, and the sheet is rapidly cooled by air or water after being produced, and is parked for more than 8 hours to eliminate internal stress; and the rubber material for the engine hose is obtained.