Synchronous belt carbon fiber rope with high wear resistance and preparation method thereof

Abstract

The invention discloses a synchronous belt carbon fiber rope with high wear resistance and a preparation method thereof. The synchronous belt carbon fiber rope comprises a carbon fiber rope and a wear-resistant coating sprayed on the carbon fiber rope, the carbon fiber rope comprises the following raw materials in parts by weight: 30-60 parts of carbon fibers, 40-55 parts of epoxy resin, 20-30 parts of butyl methacrylate and 2-3 parts of a curing agent. The wear-resistant coating comprises the following raw materials in parts by weight: 30-40 parts of polyethylene, 15-20 parts of natural rubber, 3-5 parts of molybdenum disulfide, 1-2 parts of antimony trioxide, 1-2 parts of a coupling agent and 1-2 parts of a vulcanizing agent. The synchronous belt carbon fiber rope is high in strength, good in wear resistance and excellent in heat aging resistance and cold resistance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of composite fiber ropes, and particularly relates to a synchronous belt carbon fiber wire rope with high wear resistance and a preparation method thereof. BACKGROUND

[0002] The transmission belt is an indispensable standard part in mechanical transmission device, which combines the advantages of belt transmission, chain transmission and gear transmission. When rotating, the power is transmitted through the meshing of the belt teeth and the tooth groove of the wheel, so that the belt and the pulley are not out of synchronization during transmission due to slip. It has the advantages of accurate transmission ratio, high transmission efficiency, large transmission power range, high transmission compliance, stable transmission, small impact, no lubrication, no pollution, low noise, etc. It is widely used in mechanical transmission of various types in various industries such as machine tools, textiles, light industry, tobacco, petroleum, communication cable, chemical industry, mining, metallurgy, automobile, food, instrument and meter, etc.

[0003] At present, the synchronous belt used in various industries is prone to deformation during use, has poor creep resistance, poor dimensional precision, and the temperature resistance, wear resistance and aging resistance need to be further improved, and the service life is short. Using carbon fiber twisted wire rope to form the reinforcing framework of the synchronous belt is one of the effective methods to solve the above problems. However, the existing carbon fiber synchronous belt still has technical defects such as insufficient wear resistance, mechanical properties, heat aging resistance and cold resistance need to be further improved.

[0004] In order to solve the above problems of the existing carbon fiber synchronous belt, a multifunctional carbon fiber reinforced polyurethane rubber synchronous toothed belt and a preparation method thereof are disclosed in Chinese patent No. CN115679711B. The synchronous toothed belt comprises a back belt surface rubber functional layer, a polyurethane rubber base belt layer, a carbon fiber framework layer, a belt tooth and a tooth surface arranged in sequence. The back belt surface rubber functional layer is polyurethane rubber, natural rubber, nitrile rubber, ethylene propylene terpolymer and silicone rubber. The carbon fiber framework layer accounts for 5-25% of the thickness of the back belt surface rubber layer. The carbon fiber framework layer is a carbon fiber fabric woven from different tow carbon fibers. The carbon fiber fabric is sequentially subjected to surface treatment and sizing treatment. The sizing rate of the carbon fiber fabric is 0.5-0.8%, the surface tension of the sizing agent is 43-47 mN / m, and the viscosity is 1.5-2.5 cp. The synchronous toothed belt prepared by the invention has high strength, good wear resistance, low elongation and good dimensional stability. However, its aging resistance and cold resistance still need to be further improved.

[0005] Carbon fiber composites possess numerous advantages, including high bending stiffness, high ultimate strength, strong corrosion resistance, ease of repair, high impact resistance, low coefficient of thermal expansion and thermal conductivity, and lightweight and non-buoyant properties. These advantages significantly overcome the weaknesses of traditional steel wire ropes, such as high density, difficulty in kinking, and susceptibility to rust, as well as the weaknesses of traditional chemical fiber ropes, such as low strength, high elongation, and easy aging. Carbon fiber and its composites can serve as both structural load-bearing materials and functional materials. Carbon fiber ropes also exhibit a variety of superior properties, possessing unparalleled advantages over ordinary ropes. Summary of the Invention

[0006] Purpose of the invention: To address the shortcomings of existing technologies, this invention proposes a synchronous belt carbon fiber rope with high wear resistance and its preparation method.

[0007] Technical solution: The present invention provides a synchronous belt carbon fiber rope with high wear resistance, comprising a carbon fiber rope and a wear-resistant coating sprayed on the carbon fiber rope.

[0008] The carbon fiber rope comprises the following raw materials in parts by weight: 30-60 parts carbon fiber, 40-55 parts epoxy resin, 20-30 parts butyl methacrylate, and 2-3 parts curing agent.

[0009] The wear-resistant coating comprises the following raw materials in parts by weight: 30-40 parts polyethylene, 15-20 parts natural rubber, 3-5 parts molybdenum disulfide, 1-2 parts antimony trioxide, 1-2 parts coupling agent, and 1-2 parts vulcanizing agent.

[0010] In some embodiments, the carbon fibers have a diameter of 5-10 μm and an aspect ratio of 15-25:1, and require two pretreatments: acetone ultrasonication and roughening.

[0011] In some embodiments, the linear density of the carbon fiber is 4.15 to 4.55 g / m.

[0012] In some embodiments, the curing agent is phthalic anhydride.

[0013] In some embodiments, the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570.

[0014] In some embodiments, the vulcanizing agent is one of dicumyl oxide or benzoyl peroxide.

[0015] On the other hand, the present invention also discloses a method for preparing a synchronous belt carbon fiber cord with high wear resistance, comprising the following steps:

[0016] S1. Multiple carbon fibers are mixed and plied together on a plier to obtain initial fiber yarn;

[0017] S2. Twist the initial fiber yarns separately to obtain the initial fiber cords;

[0018] S3. Twist multiple initial fiber ropes to form strands to obtain fiber rope strands;

[0019] S4. Braid multiple fiber rope strands into fiber rope on a braiding machine;

[0020] S5. Prepare an impregnation solution by mixing epoxy resin, butyl methacrylate and curing agent in a certain proportion. Then, pass the fiber rope through impregnation, twisting, curing, coating and molding to finally obtain synchronous belt carbon fiber rope.

[0021] S6. Prepare a spraying liquid by mixing the raw materials of the wear-resistant coating according to the ratio, and apply it to the surface of the synchronous belt carbon fiber rope by plasma spraying.

[0022] S7. Apply a spray liquid containing nanoparticles to the surface of the synchronous belt carbon fiber rope that has been plasma sprayed once.

[0023] S8. Secondary plasma spraying is performed on the synchronous belt carbon fiber rope to finally obtain a synchronous belt carbon fiber rope with high wear resistance.

[0024] In some embodiments, the impregnation temperature in step S5 is 60-80°C, the impregnation pressure is 0.1-0.5 MPa, and the running speed is 0.5-2.5 m / mm.

[0025] In some implementations, the parameters for the first plasma spraying in step S6 are: power of 200-500W and time of 40-70s; the process parameters for the second plasma spraying in step S8 are: power of 300-700W and time of more than 30s.

[0026] In some embodiments, the preparation of the spraying liquid containing nanoparticles in step S7 involves mixing nanoparticles with acetone solvent and then ultrasonically vibrating the mixture to obtain a sol solution with a concentration of 0.03-0.2%.

[0027] Beneficial effects: The beneficial effects of this invention are as follows:

[0028] (1) The synchronous belt carbon fiber cord with high wear resistance obtained by the present invention has high strength, good wear resistance, excellent heat aging resistance and cold resistance.

[0029] (2) The preparation method of synchronous belt carbon fiber rope with high wear resistance disclosed in this invention is simple, easy to operate and control, has high preparation efficiency and finished product qualification rate, low dependence on equipment, suitable for continuous large-scale production, and has high promotion and application value.

[0030] (3) The carbon fiber rope of the present invention is made of carbon fiber with a diameter of 5-10 μm and an aspect ratio of 15-25:1. It requires two pretreatments: ultrasonic treatment with acetone and roughening. The linear density of the carbon fiber is 4.15-4.55 g / m. The resulting synchronous belt carbon fiber rope has high strength and good wear resistance.

[0031] (4) The wear-resistant coating of the present invention comprises the following raw materials in parts by weight: 30-40 parts of polyethylene, 15-20 parts of natural rubber, 3-5 parts of molybdenum disulfide, 1-2 parts of antimony trioxide, 1-2 parts of coupling agent, and 1-2 parts of vulcanizing agent. The resulting synchronous belt carbon fiber cord has excellent heat aging resistance and cold resistance. Detailed Implementation

[0032] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1

[0034] A synchronous belt carbon fiber rope with high wear resistance includes a carbon fiber rope and a wear-resistant coating sprayed on the carbon fiber rope.

[0035] The carbon fiber rope comprises the following raw materials in parts by weight: 30 parts carbon fiber, 40 parts epoxy resin, 20 parts butyl methacrylate, and 2 parts phthalic anhydride.

[0036] The wear-resistant coating comprises the following raw materials in parts by weight: 30 parts polyethylene, 15 parts natural rubber, 3 parts molybdenum disulfide, 1 part antimony trioxide, 1 part silane coupling agent KH550, and 1 part dicumyl oxide.

[0037] The carbon fibers have a diameter of 5-10 μm and an aspect ratio of 15-25:1, requiring two pretreatment processes: ultrasonic treatment with acetone and roughening. Acetone is an organic solvent that effectively removes oil and other organic impurities from the material surface. Immersing the carbon fibers in acetone removes surface oil and other organic impurities. They are then air-dried in a well-ventilated environment, followed by ultrasonic vibration in deionized water for 5-10 minutes, and then dehydrated. The roughening process includes methods such as plasma etching, sandblasting, and chemical etching. Plasma roughening controls the surface roughness of the carbon fiber material by adjusting the current (3A-5A) and time (30-60 minutes). Chemical roughening involves different processes such as chromium anhydride-sulfuric acid systems and manganese dioxide-sulfuric acid systems, which can improve the bonding strength between the epoxy resin board and the coating. .

[0038] The above-mentioned method for preparing a synchronous belt carbon fiber cord with high wear resistance includes the following steps:

[0039] S1. Multiple carbon fibers are mixed and plied together on a plier to obtain initial fiber yarn;

[0040] S2. Twist the initial fiber yarns separately to obtain the initial fiber cords;

[0041] S3. Twist multiple initial fiber ropes to form strands to obtain fiber rope strands;

[0042] S4. Braid multiple fiber rope strands into fiber rope on a braiding machine;

[0043] S5. Prepare an impregnation solution by mixing epoxy resin, butyl methacrylate, and phthalic anhydride in a certain proportion. Then, pass the fiber rope through the impregnation solution, twist, cure, coat, and shape to finally obtain the synchronous belt carbon fiber rope. The impregnation temperature is 60℃, the impregnation pressure is 0.1MPa, and the running speed is 0.5m / mm.

[0044] S6. Prepare a spraying liquid by mixing the raw materials of the wear-resistant coating according to the ratio, and apply it to the surface of the synchronous belt carbon fiber rope by plasma spraying. The parameters of one plasma spraying are: power of 200-W and time of 40s.

[0045] S7. The nanoparticle-containing spray liquid is coated on the surface of the synchronous belt carbon fiber rope after a single plasma spraying. The preparation of the nanoparticle-containing spray liquid is as follows: the nanoparticles are mixed with acetone solvent and ultrasonically vibrated to obtain a sol solution with a concentration of 0.03%.

[0046] S8. Perform secondary plasma spraying on the synchronous belt carbon fiber rope. The process parameters for secondary plasma spraying are: power of 300W and time of more than 40s, and finally obtain synchronous belt carbon fiber rope with high wear resistance.

[0047] Example 2

[0048] A synchronous belt carbon fiber rope with high wear resistance includes a carbon fiber rope and a wear-resistant coating sprayed on the carbon fiber rope.

[0049] The carbon fiber rope comprises the following raw materials in parts by weight: 45 parts carbon fiber, 50 parts epoxy resin, 25 parts butyl methacrylate, and 3 parts phthalic anhydride.

[0050] The wear-resistant coating comprises the following raw materials in parts by weight: 35 parts polyethylene, 18 parts natural rubber, 4 parts molybdenum disulfide, 2 parts antimony trioxide, 2 parts silane coupling agent KH560, and 2 parts benzoyl peroxide.

[0051] The carbon fibers have a diameter of 5-10 μm and an aspect ratio of 15-25:1, requiring two pretreatment processes: ultrasonic treatment with acetone and roughening. Acetone is an organic solvent that effectively removes oil and other organic impurities from the material surface. Immersing the carbon fibers in acetone removes surface oil and other organic impurities. They are then air-dried in a well-ventilated environment, followed by ultrasonic vibration in deionized water for 5-10 minutes, and then dehydrated. The roughening process includes methods such as plasma etching, sandblasting, and chemical etching. Plasma roughening controls the surface roughness of the carbon fiber material by adjusting the current (3A-5A) and time (30-60 minutes). Chemical roughening involves different processes such as chromium anhydride-sulfuric acid systems and manganese dioxide-sulfuric acid systems, which can improve the bonding strength between the epoxy resin board and the coating. .

[0052] The above-mentioned method for preparing a synchronous belt carbon fiber cord with high wear resistance includes the following steps:

[0053] S1. Multiple carbon fibers are mixed and plied together on a plier to obtain initial fiber yarn;

[0054] S2. Twist the initial fiber yarns separately to obtain the initial fiber cords;

[0055] S3. Twist multiple initial fiber ropes to form strands to obtain fiber rope strands;

[0056] S4. Braid multiple fiber rope strands into fiber rope on a braiding machine;

[0057] S5. Prepare an impregnation solution by mixing epoxy resin, butyl methacrylate, and phthalic anhydride in a specified ratio. Then, sequentially impregnate the fiber rope, twist it, cure it, coat it, and shape it to finally obtain a synchronous belt carbon fiber rope. The impregnation temperature is 70℃, the impregnation pressure is 0.3MPa, and the running speed is 1.5m / mm.

[0058] S6. Prepare a spraying liquid by mixing the raw materials of the wear-resistant coating according to the ratio, and apply it to the surface of the synchronous belt carbon fiber rope by plasma spraying. The parameters of one plasma spraying are: power of 350W and time of 55s.

[0059] S7. The nanoparticle-containing spray liquid is coated on the surface of the synchronous belt carbon fiber rope after a single plasma spraying. Preparation of the nanoparticle-containing spray liquid: the nanoparticles are mixed with acetone solvent and ultrasonically vibrated to obtain a sol solution with a concentration of 0.1%.

[0060] S8. Perform secondary plasma spraying on the synchronous belt carbon fiber rope. The process parameters for secondary plasma spraying are: power of 500W and time of 50s, and finally obtain synchronous belt carbon fiber rope with high wear resistance.

[0061] Example 3

[0062] A synchronous belt carbon fiber rope with high wear resistance includes a carbon fiber rope and a wear-resistant coating sprayed on the carbon fiber rope.

[0063] The carbon fiber rope comprises the following raw materials in parts by weight: 60 parts carbon fiber, 55 parts epoxy resin, 30 parts butyl methacrylate, and 3 parts phthalic anhydride.

[0064] The wear-resistant coating comprises the following raw materials in parts by weight: 40 parts polyethylene, 20 parts natural rubber, 5 parts molybdenum disulfide, 2 parts antimony trioxide, 2 parts coupling agent silane coupling agent KH570, and 2 parts diisopropylbenzene oxide.

[0065] The carbon fibers have a diameter of 5-10 μm and an aspect ratio of 15-25:1, requiring two pretreatment processes: ultrasonic treatment with acetone and roughening. Acetone is an organic solvent that effectively removes oil and other organic impurities from the material surface. Immersing the carbon fibers in acetone removes surface oil and other organic impurities. They are then air-dried in a well-ventilated environment, followed by ultrasonic vibration in deionized water for 5-10 minutes, and then dehydrated. The roughening process includes methods such as plasma etching, sandblasting, and chemical etching. Plasma roughening controls the surface roughness of the carbon fiber material by adjusting the current (3A-5A) and time (30-60 minutes). Chemical roughening involves different processes such as chromium anhydride-sulfuric acid systems and manganese dioxide-sulfuric acid systems, which can improve the bonding strength between the epoxy resin board and the coating. .

[0066] The above-mentioned method for preparing a synchronous belt carbon fiber cord with high wear resistance includes the following steps:

[0067] S1. Multiple carbon fibers are mixed and plied together on a plier to obtain initial fiber yarn;

[0068] S2. Twist the initial fiber yarns separately to obtain the initial fiber cords;

[0069] S3. Twist multiple initial fiber ropes to form strands to obtain fiber rope strands;

[0070] S4. Braid multiple fiber rope strands into fiber rope on a braiding machine;

[0071] S5. Prepare an impregnation solution by mixing epoxy resin, butyl methacrylate, and phthalic anhydride in a certain proportion. Then, pass the fiber rope through the impregnation solution, twist, cure, coat, and shape to finally obtain the synchronous belt carbon fiber rope. The impregnation temperature is 80℃, the impregnation pressure is 0.5MPa, and the running speed is 2.5m / mm.

[0072] S6. Prepare a spraying liquid by mixing the raw materials of the wear-resistant coating according to the ratio, and apply it to the surface of the synchronous belt carbon fiber rope by plasma spraying. The parameters of one plasma spraying are: power of 500W and time of 70s.

[0073] S7. Coat the surface of the synchronous belt carbon fiber rope with nanoparticles onto the spray liquid containing nanoparticles after a single plasma spraying. Preparation of the spray liquid containing nanoparticles: Mix nanoparticles with acetone solvent and then ultrasonically vibrate to obtain a sol solution with a concentration of 0.2%.

[0074] S8. Perform secondary plasma spraying on the synchronous belt carbon fiber rope. The process parameters for secondary plasma spraying are: power of 700W and time of 55s, and finally obtain a synchronous belt carbon fiber rope with high wear resistance.

[0075] The wear-resistant carbon fiber synchronous belt disclosed in this invention has superior heat aging resistance, cold resistance, and wear resistance compared to the comparative product, and also has greater strength.

[0076] In Example 1, the final synchronous belt carbon fiber cord with high wear resistance has a tensile strength of 2350 N / mm, a cross-sectional shear strength of 85.5 MPa, a heat aging resistance of 99.25%, and a cold resistance of 99.15%.

[0077] In Example 2, the final synchronous belt carbon fiber cord with high wear resistance has a tensile strength of 2450 N / mm, a cross-sectional shear strength of 86.8 MPa, a heat aging resistance of 99.75%, and a cold resistance of 99.55%.

[0078] In Example 3, the final synchronous belt carbon fiber cord with high wear resistance has a tensile strength of 2400 N / mm, a cross-sectional shear strength of 86.2 MPa, a heat aging resistance of 99.52%, and a cold resistance of 99.45%.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A synchronous belt carbon fiber rope with high wear resistance, characterized in that: Includes carbon fiber rope and a wear-resistant coating sprayed onto the carbon fiber rope; The carbon fiber rope comprises the following raw materials in parts by weight: 30-60 parts carbon fiber, 40-55 parts epoxy resin, 20-30 parts butyl methacrylate, and 2-3 parts curing agent. The wear-resistant coating comprises the following raw materials in parts by weight: 30-40 parts polyethylene, 15-20 parts natural rubber, 3-5 parts molybdenum disulfide, 1-2 parts antimony trioxide, 1-2 parts coupling agent, and 1-2 parts vulcanizing agent.

2. The synchronous belt carbon fiber rope with high wear resistance according to claim 1, characterized in that: The carbon fibers have a diameter of 5-10 μm and an aspect ratio of 15-25:1, and require two pretreatments: ultrasonic treatment with acetone and roughening.

3. The synchronous belt carbon fiber rope with high wear resistance according to claim 2, characterized in that: The linear density of the carbon fiber is 4.15 to 4.55 g / m.

4. The synchronous belt carbon fiber rope with high wear resistance according to claim 1, characterized in that: The curing agent is phthalic anhydride.

5. A synchronous belt carbon fiber rope with high wear resistance according to claim 1, characterized in that: The coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570.

6. The synchronous belt carbon fiber rope with high wear resistance according to claim 1, characterized in that: The vulcanizing agent is either dicumyl oxide or benzoyl peroxide.

7. A method for preparing a synchronous belt carbon fiber rope with high wear resistance according to any one of claims 1-6, characterized in that: Includes the following steps: S1. Multiple carbon fibers are mixed and plied together on a plier to obtain initial fiber yarn; S2. Twist the initial fiber yarns separately to obtain the initial fiber cords; S3. Twist multiple initial fiber ropes to form strands to obtain fiber rope strands; S4. Braid multiple fiber rope strands into fiber rope on a braiding machine; S5. Prepare an impregnation solution by mixing epoxy resin, butyl methacrylate and curing agent in a certain proportion. Then, pass the fiber rope through impregnation, twisting, curing, coating and molding to finally obtain synchronous belt carbon fiber rope. S6. Prepare a spraying liquid by mixing the raw materials of the wear-resistant coating according to the ratio, and apply it to the surface of the synchronous belt carbon fiber rope by plasma spraying. S7. Apply a spray liquid containing nanoparticles to the surface of the synchronous belt carbon fiber rope that has been plasma sprayed once. S8. Secondary plasma spraying is performed on the synchronous belt carbon fiber rope to finally obtain a synchronous belt carbon fiber rope with high wear resistance.

8. The method for preparing a synchronous belt carbon fiber rope with high wear resistance according to claim 7, characterized in that: The impregnation temperature in step S5 is 60-80℃, the impregnation pressure is 0.1-0.5MPa, and the running speed is 0.5-2.5m / mm.

9. The method for preparing a synchronous belt carbon fiber rope with high wear resistance according to claim 7, characterized in that: The parameters for the first plasma spraying in step S6 are: power of 200-500W and time of 40-70s; the parameters for the second plasma spraying in step S8 are: power of 300-700W and time of more than 30s.

10. The method for preparing a synchronous belt carbon fiber rope with high wear resistance according to claim 7, characterized in that: Preparation of the spraying liquid containing nanoparticles in step S7: The nanoparticles are mixed with acetone solvent and ultrasonically vibrated to obtain a sol solution with a concentration of 0.03-0.2%.