Corrosion-resistant crane cable composite material and preparation method thereof

Abstract

The invention discloses a corrosion-resistant crane cable composite material, and relates to the technical field of cable materials. The corrosion-resistant crane cable composite material comprises the following raw materials in parts by weight: 40-60 parts of an ethylene-vinyl acetate copolymer, 15-25 parts of modified polyvinyl chloride, 10-20 parts of modified nitrile rubber, 20-30 parts of aluminum hydroxide, 5-10 parts of nano titanium dioxide, 5-10 parts of a silane coupling agent, 3-8 parts of an antibacterial agent, 1-3 parts of an antioxidant, 1-3 parts of a lubricant and 3-5 parts of a plasticizer. Through the synergistic effect of the ethylene-vinyl acetate copolymer, the modified polyvinyl chloride and the modified nitrile rubber, the cable material has excellent mechanical properties, can bear tensile stress, bending stress and other stresses of the crane cable under complex working conditions, and is not easy to deform and break. Good flame retardance is achieved, and fire hazards can be reduced. And the weather resistance and the aging resistance are excellent, so that the performance can be kept stable even if the coating is exposed in a severe environment for a long time. In addition, the cable also has the characteristics of antibiosis, antioxidation, easy processing and anti-electromagnetic interference, and comprehensively meets the use requirements of the crane cable.

Description

Technical Field

[0001] The invention relates to the technical field of cable materials, in particular to a corrosion-resistant driving cable composite material and a preparation method thereof. Background Art

[0002] In modern industrial production, crane cables, as key components that connect mobile equipment with fixed power supplies or control systems, are widely used in various lifting machinery, electric hoists, automated production lines, etc. Their working environment is often extremely complex and harsh, which places extremely high demands on the performance of crane cables.

[0003] From the perspective of chemical corrosion, many industrial production workshops have various chemical substances, such as acid, alkali, and salt solutions. Once these chemical substances come into contact with the driving cable, the outer skin and internal structure of the cable are easily corroded, thereby reducing the insulation performance of the cable and increasing the risk of short circuit and leakage. In some high-temperature working environments, driving cables need to withstand higher temperatures. High temperatures will accelerate the aging process of the cable composite material, making it hard and brittle, and losing its original flexibility and mechanical strength. When the cable is bent frequently, the aging outer skin is easy to break, exposing the internal conductor and causing safety accidents. Moreover, when facing the simultaneous action of multiple harsh environmental factors, the performance of the existing driving cable composite material deteriorates faster, and cannot meet the needs of industrial production for long-term stable operation of cables.

[0004] At present, although some traditional cable composite materials on the market have certain mechanical strength, their corrosion resistance is difficult to reach the ideal state under chemical corrosion and humid environments. Some materials try to improve the protective performance by increasing the thickness, but this not only increases the weight and cost of the cable, but also fails to fundamentally solve the corrosion resistance problem. Moreover, the existing preparation process has technical bottlenecks in improving the compatibility and dispersibility between the various components of the material, which makes it difficult to effectively improve the comprehensive performance of the material, further limiting the service life and safety of the driving cable in harsh environments. Therefore, the development of a driving cable composite material with excellent corrosion resistance and its efficient preparation method has become an important issue that needs to be urgently solved in the current field of cable material technology. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a corrosion-resistant driving cable assembly material and a preparation method thereof, which solves the problems that the existing cable assembly materials are not corrosion-resistant, not resistant to high temperatures in special working environments, and have poor impact strength.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A corrosion-resistant overhead crane cable compound, comprising the following raw materials in parts by weight: 40-60 parts of ethylene-vinyl acetate copolymer, 15-25 parts of modified polyvinyl chloride, 10-20 parts of modified nitrile rubber, 20-30 parts of aluminum hydroxide, 5-10 parts of nano-titanium dioxide, 5-10 parts of silane coupling agent, 3-8 parts of antibacterial agent, 1-3 parts of antioxidant, 1-3 parts of lubricant, 3-5 parts of plasticizer.

[0007] Further, the weight-average molecular weight of the ethylene-vinyl acetate copolymer is 150,000.

[0008] Further, the modified polyvinyl chloride comprises the following raw materials in parts by weight: 15-25 parts of polyvinyl chloride, 10-20 parts of methyl methacrylate-butadiene-styrene copolymer, 10-15 parts of polybutylene adipate / terephthalate, 10-15 parts of carbon nanotubes, 1-5 parts of stearic acid, 5-10 parts of nano silver wires, 15-25 parts of ethanol, 1-3 parts of polymethylhydrogensiloxane, 5-10 parts of nano zinc oxide, 3-5 parts of aluminum tripolyphosphate, 10-20 parts of epoxidized soybean oil; The specific preparation steps of the modified polyvinyl chloride are as follows: A1. Put the carbon nanotubes and stearic acid into a high-speed mixer, stir at a speed of 1000-1500 r / min for 20-30 minutes, disperse the nano silver wires by ultrasonic treatment in an ethanol solution for 20-30 minutes, control the ultrasonic power at 200-300 watts, and then dry in a vacuum drying oven at 60-80 °C for 1-2 hours; A2. First, slowly pour the polyvinyl chloride raw materials into a high-speed mixer, stir at a speed of 300-500 r / min, and at the same time heat up to 120-130 °C at a rate of 5 °C / min and keep it constant; increase the mixer speed to 1000-1500 r / min, slowly add the methyl methacrylate-butadiene-styrene copolymer, and stir for 30-40 minutes; heat up to 160-190 °C, add the polybutylene adipate / terephthalate, and stir at a speed of 1000-1500 r / min for 10-15 minutes to obtain the first modified polyvinyl chloride; A3. Transfer all the first modified polyvinyl chloride to a reaction kettle, stir at a speed of 100-300 r / min, slowly add the polymethylhydrogensiloxane, stir for 20-30 minutes, then slowly add the nano zinc oxide and aluminum tripolyphosphate, close the feed inlet of the reaction kettle, and increase the temperature to 140-160 °C at a heating rate of 3 °C / min. Under the stirring condition of 100-300 r / min, continuously stir and react for 30-60 minutes, and then add the pretreated conductive filler and continue to stir for 10-15 minutes to obtain the second modified polyvinyl chloride; A4. Transfer all the polyvinyl chloride after the second modification to a stirring container, stir at a speed of 200 - 400 r / min, slowly add epoxidized soybean oil into the container, increase the temperature to 110 - 120 °C at a heating rate of 2 °C per minute and keep it constant, and continuously stir for 20 - 30 minutes under the stirring condition of 200 - 500 r / min to obtain modified polyvinyl chloride.

[0009] Furthermore, the modified nitrile rubber contains the following raw materials in parts by weight: 30 - 50 parts of nitrile rubber, 3 - 7 parts of magnesium hydroxide flame retardant, 5 - 8 parts of microencapsulated red phosphorus flame retardant, 10 - 15 parts of polybutylene adipate / terephthalate, 5 - 10 parts of 1,6 - hexanedithiol, and 5 - 10 parts of boron nitride nanosheets.

[0010] The specific preparation steps of the modified nitrile rubber are as follows: B1. Preheat the internal mixer to 130 - 140 °C, set the rotation speed to 30 - 40 r / min, slowly add nitrile rubber, and after it softens, increase the rotation speed to 50 - 60 r / min and plasticize for 5 - 10 minutes; add the magnesium hydroxide flame retardant in three portions, with an interval of 2 - 4 minutes between each addition, keep stirring at 50 - 60 r / min during the addition process, and continue stirring for 10 - 15 minutes after the addition; similarly, add the microencapsulated red phosphorus flame retardant in three portions, with an interval of 2 - 4 minutes between each addition, keep stirring at 50 - 60 r / min during the addition process, after adding the flame retardant, increase the stirring speed to 80 - 90 r / min, continue internal mixing for 15 - 20 minutes, increase the temperature to 150 - 170 °C, add polybutylene adipate / terephthalate and internal mix for 10 - 15 minutes, after the internal mixing is completed, cool down to 80 - 100 °C, and take out the nitrile rubber after the first modification; B2. Preheat the high - speed mixer to 110 - 120 °C, turn on the stirring, stir at a speed of 500 - 600 r / min, slowly add the nitrile rubber after the first modification into the high - speed mixer, and continue stirring for 5 - 10 minutes after reaching the set temperature; slowly and uniformly add 1,6 - hexanedithiol, and at the same time increase the rotation speed to 800 - 1000 r / min and stir for 20 - 30 minutes; after the stirring is completed, wait for the material temperature to drop to 70 - 80 °C and take out the nitrile rubber after the second modification; B3. Set the temperatures of each section of the twin-screw extruder, which are 120°C, 130°C, 140°C, 145°C, and 150°C in sequence from the feeding section to the head. Preheat and stabilize for 15 - 20 minutes; Slowly add small pieces of the second-modified nitrile rubber into the feeding section of the twin-screw extruder through the hopper, and start with a screw speed of 100 - 200 r / min; After it is plasticized, raise the speed to 200 - 300 r / min; At the side feeding port of the twin-screw extruder, add boron nitride nanosheets at a uniform speed. Add boron nitride nanosheets evenly from the side feeding port, control to finish adding in 10 - 15 minutes, then raise the screw speed to 300 - 400 r / min and stir for 15 - 20 minutes; The extruded material is cut into particles with a diameter of 2 - 4 mm by a granulator to obtain the modified nitrile rubber.

[0011] Further, the silane coupling agent is one of KH550 and KH560.

[0012] Further, the antioxidant is one of antioxidant 1010, antioxidant 1076, and antioxidant 2246.

[0013] Further, the lubricant is one of paraffin wax and polyethylene wax.

[0014] Further, the plasticizer is one of trioctyl trimellitate and tricresyl phosphate.

[0015] Further, the antibacterial agent is one of JL-1062 rubber cable antibacterial and mildew-proof agent and PVC mildew-proof and antibacterial agent OBF10.

[0016] A preparation method of a corrosion-resistant overhead cable compound specifically includes the following steps: S1. Put ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into a blast drying oven and dry at 80 - 100°C for 2 - 3 hours; Put aluminum hydroxide and nano-titanium dioxide into a high-speed mixer, add the silane coupling agent, and stir at 800 - 1000 r / min at room temperature for 30 - 60 minutes; S2. Sequentially add the dried ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into the high-speed mixer, turn on the stirring, stir at a speed of 500 - 600 r / min, raise the temperature to 120 - 150°C, add the antibacterial agent and stir for 20 - 40 minutes, lower the temperature to 50 - 70°C, slowly and evenly add the surface-treated aluminum hydroxide, nano-titanium dioxide, antioxidant, lubricant, and plasticizer in sequence, and at the same time raise the stirring speed to 800 - 1000 r / min and continue to stir for 15 - 20 minutes; S3. Set the temperatures of each section of the twin-screw extruder, which are 150°C, 160°C, 165°C, 170°C, and 170°C in sequence from the feeding section to the die head, preheat and stabilize for 15 - 20 minutes; add the above materials to the feeding section of the twin-screw extruder, stir at a screw speed of 100 - 200 r / min, and increase it to 200 - 300 r / min after the materials are plasticized; the materials are extruded into strip-shaped objects through the die head and introduced into a cooling water tank at 10 - 15°C for water cooling and solidification; the cooled strip-shaped objects are cut into uniform particles with a diameter of 2 - 4 mm and placed in a drying oven at 60 - 80°C for drying for 1 - 2 hours to obtain the combined material for overhead traveling crane cables.

[0017] The present invention provides a corrosion-resistant combined material for overhead traveling crane cables and its preparation method, having the following beneficial effects: 1. In the corrosion-resistant combined material for overhead traveling crane cables, ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber cooperate with each other to endow the material with good flexibility and mechanical properties. This characteristic enables the cable to withstand stresses such as tensile and bending under the complex working conditions of the overhead traveling crane, and is not easily deformed and broken. At the same time, the added aluminum hydroxide and nano-titanium dioxide improve the flame retardancy and weather resistance of the material. Among them, nano-titanium dioxide is outstanding in ultraviolet protection and anti-chemical corrosion, and can effectively resist the erosion of the external environment on the cable. In addition, the addition of antioxidants prevents the material from aging, lubricants improve the processing performance, plasticizers improve the flexibility of the material, and antibacterial agents inhibit the growth and reproduction of microorganisms such as bacteria and molds, meeting the use requirements of overhead traveling crane cables and extending the service life of the cables.

[0018] 2. In the preparation method, the pretreatment and surface treatment of the raw materials improve the compatibility and dispersibility among the components, so that the prepared combined material for cables has excellent corrosion resistance, extends the service life of the overhead traveling crane cables, and reduces the maintenance cost. Nano-titanium dioxide has good ultraviolet absorption ability and can effectively prevent the combined material from aging due to ultraviolet radiation. The silane coupling agent can improve the bonding force among the components and enhance the overall stability of the material, making it not easily degrade in performance or be damaged in structure due to natural factors such as wind and sun during long-term outdoor use, and improving the weather resistance and service life of the overhead traveling crane cables.

[0019] 3. In modified polyvinyl chloride, the addition of methyl methacrylate-butadiene-styrene copolymer can form a sea-island structure, which can improve the toughness and impact resistance of polyvinyl chloride, making the driving cable not easily broken or damaged when subjected to external force impact. Polymethylhydrosiloxane has good heat resistance and can maintain good performance in high-temperature environments. Epoxidized soybean oil can reduce the intermolecular force of polyvinyl chloride, increase the flexibility and fluidity of molecular chains, making the modified polyvinyl chloride easier to mold during the processing, reducing the processing difficulty, improving the production efficiency, and also helping to improve the surface quality of the driving cable. Aluminum tripolyphosphate can form a protective film on the surface of polyvinyl chloride, improving the corrosion resistance of the driving cable to chemical substances such as acids and alkalis. By adding pretreated conductive fillers carbon nanotubes and nanosilver wires, a conductive network structure can be formed to help release static charges and shield electromagnetic interference, enabling it to meet the special requirements of driving cables in different electrical environments.

[0020] 4. In this modified nitrile rubber, by adding magnesium hydroxide and phosphorus-based flame retardants, during combustion, magnesium hydroxide can decompose endothermically, reducing the surface temperature of the material, and at the same time, the generated magnesium oxide covers the surface of the material, isolating oxygen; the phosphorus-based flame retardant can form a dense char layer on the surface of the material, preventing heat transfer and oxygen entry, so that the nitrile rubber has good flame retardant performance and reduces the fire risk. Introducing a self-healing agent containing disulfide bonds, when the nitrile rubber is damaged, the disulfide bonds will break and recombine under certain conditions, enabling the rubber molecular chains to reconnect, thus realizing the self-healing of the material, extending the service life of the material, and reducing the maintenance cost. The added boron nitride nanosheets have high thermal conductivity. After being uniformly dispersed in the nitrile rubber, they can form an efficient heat dissipation network, quickly conducting the heat generated inside the rubber out, avoiding the decline of material performance caused by heat accumulation, and improving the use performance and stability of the nitrile rubber in high-temperature environments. Detailed implementation mode

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Example 1 A corrosion-resistant driving cable composite material contains the following raw materials in parts by weight: 40 parts of ethylene-vinyl acetate copolymer, 15 parts of modified polyvinyl chloride, 10 parts of modified nitrile rubber, 20 parts of aluminum hydroxide, 5 parts of nano-titanium dioxide, 5 parts of silane coupling agent, 3 parts of antibacterial agent, 1 part of antioxidant, 1 part of lubricant, and 3 parts of plasticizer.

[0023] A preparation method of a corrosion-resistant overhead crane cable compound specifically includes the following steps: S1. Put ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into a forced-air drying oven and dry at 80°C for 2 hours; put aluminum hydroxide and nano-titanium dioxide into a high-speed mixer, add a silane coupling agent, and stir at 800 r / min at room temperature for 30 minutes; S2. Sequentially add the dried ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into a high-speed mixer, start stirring, stir at a speed of 500 r / min, heat up to 120°C, add an antibacterial agent and stir for 20 minutes, cool down to 50°C, and slowly and uniformly add the surface-treated aluminum hydroxide, nano-titanium dioxide, antioxidant, lubricant, and plasticizer in sequence. At the same time, increase the stirring speed to 800 r / min and continue stirring for 15 minutes; S3. Set the temperatures of each section of the twin-screw extruder to be 150°C, 160°C, 165°C, 170°C, and 170°C in sequence from the feeding section to the die head, preheat and stabilize for 15 minutes; add the above materials to the feeding section of the twin-screw extruder, stir at a screw speed of 100 r / min, and increase to 200 r / min after the materials are plasticized; the materials are extruded into strips through the die head and introduced into a 10°C cooling water tank for water-cooling and solidification; the cooled strips are cut into uniform particles with a diameter of 2 mm and placed in a 60°C drying oven for drying for 1 hour to obtain the overhead crane cable compound.

[0024] The modified polyvinyl chloride contains the following raw materials in parts by weight: 15 parts of polyvinyl chloride, 10 parts of methyl methacrylate-butadiene-styrene copolymer, 10 parts of polybutylene adipate / terephthalate, 10 parts of carbon nanotubes, 1 part of stearic acid, 5 parts of nano silver wires, 15 parts of ethanol, 1 part of polymethylhydrosiloxane, 5 parts of nano zinc oxide, 3 parts of aluminum tripolyphosphate, and 10 parts of epoxidized soybean oil; The specific preparation steps of the modified polyvinyl chloride are as follows: A1. Put carbon nanotubes and stearic acid into a high-speed mixer and stir at a speed of 1000 r / min for 20 minutes. The nano silver wires are ultrasonically dispersed with an ethanol solution for 20 minutes, and the ultrasonic power is controlled at 200 watts, and then dried in a 60°C vacuum drying oven for 1 hour; A2. First, slowly pour the polyvinyl chloride raw materials into a high-speed mixer and stir at a speed of 300 r / min, and at the same time heat up to 120°C at a rate of 5°C / min and keep it constant; increase the mixer speed to 1000 r / min, slowly add the methyl methacrylate-butadiene-styrene copolymer, and stir for 30 minutes; heat up to 160°C, add the polybutylene adipate / terephthalate, and stir at a speed of 1000 r / min for 10 minutes to obtain the first-modified polyvinyl chloride; A3. Transfer all of the polyvinyl chloride after the first modification to a reaction kettle, stir at a speed of 100 r / min, slowly add polymethylhydrogensiloxane, and after stirring for 20 minutes, slowly add nano zinc oxide and aluminum tripolyphosphate. Close the feed inlet of the reaction kettle, increase the temperature to 140 °C at a heating rate of 3 °C per minute, and under the stirring condition of 100 r / min, continuously stir and react for 30 minutes. Then add the pretreated conductive filler and continue to stir for 10 minutes to obtain the second modified polyvinyl chloride; A4. Transfer all of the polyvinyl chloride after the second modification to a stirring container, stir at a speed of 200 r / min, slowly add epoxidized soybean oil to the container, increase the temperature to 110 °C at a heating rate of 2 °C per minute and keep it constant temperature, and under the stirring condition of 200 r / min, continuously stir for 20 minutes to obtain the modified polyvinyl chloride.

[0025] The modified nitrile rubber comprises the following raw materials in parts by weight: 30 parts of nitrile rubber, 3 parts of magnesium hydroxide flame retardant, 5 parts of microencapsulated red phosphorus flame retardant, 10 parts of polybutylene adipate / terephthalate, 5 parts of 1,6 - hexanedithiol, and 5 parts of boron nitride nanosheets.

[0026] The specific preparation steps of the modified nitrile rubber are as follows: B1. Preheat the internal mixer to 130 °C, set the speed to 30 r / min, slowly add nitrile rubber, and after it softens, increase the speed to 50 r / min and plasticize for 5 minutes; add the magnesium hydroxide flame retardant in three portions, with an interval of 2 minutes between each addition, and keep stirring at 50 r / min during the addition process. After the addition, continue to stir for 10 minutes; similarly, add the microencapsulated red phosphorus flame retardant in three portions, with an interval of 2 minutes between each addition, and keep stirring at 50 r / min during the addition process. After adding the flame retardant, increase the stirring speed to 80 r / min and continue internal mixing for 15 minutes, raise the temperature to 150 °C, add polybutylene adipate / terephthalate and internal mix for 10 minutes. After the internal mixing is completed, cool down to 80 °C and take out the first modified nitrile rubber; B2. Preheat the high - speed mixer to 110 °C, without starting the stirring, stir at a speed of 500 r / min, slowly add the first modified nitrile rubber to the high - speed mixer, and after reaching the set temperature, continue to stir for 5 minutes; slowly and uniformly add 1,6 - hexanedithiol, and at the same time increase the speed to 800 r / min and stir for 20 minutes; after the stirring is completed, wait for the material temperature to drop to 70 °C and take out the second modified nitrile rubber; B3. Set the temperatures of each section of the twin-screw extruder, which are 120 °C, 130 °C, 140 °C, 145 °C, and 150 °C in sequence from the feeding section to the die head, preheat and stabilize for 15 minutes; slowly add small pieces of nitrile rubber after the second modification to the feeding section of the twin-screw extruder through the hopper, and start with a screw speed of 100 r / min; after it is plasticized, raise it to 200 r / min; at the side feeding port of the twin-screw extruder, add boron nitride nanosheets at a uniform speed, add boron nitride nanosheets uniformly from the side feeding port, control to finish adding in 10 minutes, then raise the screw speed to 300 r / min and stir for 15 minutes; the extruded material is cut into particles with a diameter of 2 mm by a pelletizer to obtain the modified nitrile rubber.

[0027] Example 2 A corrosion-resistant traveling cable compound contains the following raw materials in parts by weight: 60 parts of ethylene-vinyl acetate copolymer, 25 parts of modified polyvinyl chloride, 20 parts of modified nitrile rubber, 30 parts of aluminum hydroxide, 10 parts of nano-titanium dioxide, 10 parts of silane coupling agent, 8 parts of antibacterial agent, 3 parts of antioxidant, 3 parts of lubricant, and 5 parts of plasticizer.

[0028] A preparation method of a corrosion-resistant traveling cable compound specifically includes the following steps: S1. Put the ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into a blast drying oven and dry at 100 °C for 3 hours; put the aluminum hydroxide and nano-titanium dioxide into a high-speed mixer, add the silane coupling agent, and stir at 1000 r / min at room temperature for 60 minutes; S2. Sequentially add the dried ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into the high-speed mixer, start stirring, stir at a speed of 600 r / min, raise the temperature to 150 °C, add the antibacterial agent and stir for 40 minutes, cool down to 70 °C, and slowly and uniformly add the surface-treated aluminum hydroxide, nano-titanium dioxide, antioxidant, lubricant, and plasticizer in sequence, and at the same time raise the stirring speed to 1000 r / min and continue stirring for 20 minutes; S3. Set the temperatures of each section of the twin-screw extruder, which are 150 °C, 160 °C, 165 °C, 170 °C, and 170 °C in sequence from the feeding section to the die head, preheat and stabilize for 20 minutes; add the above materials to the feeding section of the twin-screw extruder and stir at a screw speed of 200 r / min. After the materials are plasticized, raise it to 300 r / min; the materials are extruded into a strip shape through the die head and introduced into a 15 °C cooling water tank for water cooling and solidification; the cooled strip is cut into uniform particles with a diameter of 4 mm and placed in an 80 °C drying oven to dry for 2 hours to obtain the traveling cable compound.

[0029] The modified polyvinyl chloride comprises the following raw materials in parts by weight: 25 parts of polyvinyl chloride, 20 parts of methyl methacrylate-butadiene-styrene copolymer, 15 parts of polybutylene adipate / terephthalate, 15 parts of carbon nanotubes, 5 parts of stearic acid, 10 parts of silver nanowires, 25 parts of ethanol, 3 parts of polymethylhydrosiloxane, 10 parts of zinc oxide nanoparticles, 5 parts of aluminum tripolyphosphate, and 20 parts of epoxidized soybean oil; The specific preparation steps of the modified polyvinyl chloride are as follows: A1. Put the carbon nanotubes and stearic acid into a high-speed mixer and stir at a speed of 1500 r / min for 30 minutes. The silver nanowires are ultrasonically dispersed in an ethanol solution for 30 minutes, and the ultrasonic power is controlled at 300 watts. Then, dry them in a vacuum drying oven at 80 °C for 2 hours; A2. First, slowly pour the polyvinyl chloride raw material into a high-speed mixer and stir at a speed of 500 r / min. At the same time, raise the temperature to 130 °C at a rate of 5 °C per minute and keep it constant. Increase the mixer speed to 1500 r / min, slowly add the methyl methacrylate-butadiene-styrene copolymer, and stir for 40 minutes. Raise the temperature to 190 °C, add the polybutylene adipate / terephthalate, and stir at a speed of 1500 r / min for 15 minutes to obtain the first-modified polyvinyl chloride; A3. Transfer all the first-modified polyvinyl chloride to a reaction kettle, stir at a speed of 300 r / min, slowly add the polymethylhydrosiloxane, stir for 30 minutes, then slowly add the zinc oxide nanoparticles and aluminum tripolyphosphate. Close the feed inlet of the reaction kettle, raise the temperature to 160 °C at a heating rate of 3 °C per minute, and continuously stir and react for 60 minutes under the stirring condition of 300 r / min. Then, add the pretreated conductive filler and continue to stir for 15 minutes to obtain the second-modified polyvinyl chloride; A4. Transfer all the second-modified polyvinyl chloride to a stirring container, stir at a speed of 400 r / min, slowly add the epoxidized soybean oil, raise the temperature to 120 °C at a heating rate of 2 °C per minute and keep it constant, and continuously stir for 30 minutes under the stirring condition of 500 r / min to obtain the modified polyvinyl chloride.

[0030] The modified nitrile rubber comprises the following raw materials in parts by weight: 50 parts of nitrile rubber, 7 parts of magnesium hydroxide flame retardant, 8 parts of microencapsulated red phosphorus flame retardant, 15 parts of polybutylene adipate / terephthalate, 10 parts of 1,6-hexanedithiol, and 10 parts of boron nitride nanosheets.

[0031] The specific preparation steps of the modified nitrile rubber are as follows: B1. Preheat the internal mixer to 140 °C, set the rotational speed to 40 r / min, slowly add nitrile rubber. After it softens, increase the rotational speed to 60 r / min and plasticize for 10 minutes; add magnesium hydroxide flame retardant in three portions, with a 4-minute interval between each addition. During the addition process, maintain stirring at 60 r / min, and continue stirring for 15 minutes after the addition; similarly, add microencapsulated red phosphorus flame retardant in three portions, with a 4-minute interval between each addition. During the addition process, maintain stirring at 60 r / min. After adding the flame retardant, increase the stirring speed to 90 r / min and continue internal mixing for 20 minutes. Raise the temperature to 170 °C, add polybutylene adipate terephthalate and internal mix for 15 minutes. After the internal mixing is completed, cool down to 100 °C and take out the nitrile rubber after the first modification; B2. Preheat the high-speed mixer to 120 °C, start stirring at a rotational speed of 600 r / min, and slowly add the nitrile rubber after the first modification to the high-speed mixer. After reaching the set temperature, continue stirring for 10 minutes; slowly and evenly add 1,6-hexanedithiol while increasing the rotational speed to 1000 r / min and stir for 30 minutes; after the stirring is completed, wait for the material temperature to drop to 80 °C and take out the nitrile rubber after the second modification; B3. Set the temperatures of each section of the twin-screw extruder, which are 120 °C, 130 °C, 140 °C, 145 °C, and 150 °C in sequence from the feeding section to the head. Preheat and stabilize for 20 minutes; slowly add small pieces of the nitrile rubber after the second modification to the feeding section of the twin-screw extruder through the hopper and start at a screw rotational speed of 200 r / min; after it is plasticized, raise it to 300 r / min; at the side feeding port of the twin-screw extruder, add boron nitride nanosheets at a uniform speed. Add boron nitride nanosheets uniformly from the side feeding port, control to finish adding in 15 minutes, then raise the screw rotational speed to 400 r / min and stir for 20 minutes; the extruded material is cut into particles with a diameter of 4 mm by a pelletizer to obtain the modified nitrile rubber.

[0032] Example 3 A corrosion-resistant cable compound for overhead traveling cranes, comprising the following raw materials in parts by weight: 50 parts of ethylene-vinyl acetate copolymer, 20 parts of modified polyvinyl chloride, 15 parts of modified nitrile rubber, 25 parts of aluminum hydroxide, 7 parts of nano-titanium dioxide, 7 parts of silane coupling agent, 5 parts of antibacterial agent, 2 parts of antioxidant, 2 parts of lubricant, and 4 parts of plasticizer.

[0033] A preparation method of a corrosion-resistant cable compound for overhead traveling cranes specifically includes the following steps: S1. Put the ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into a blast drying oven and dry at 90 °C for 2.5 hours; put the aluminum hydroxide and nano-titanium dioxide into a high-speed mixer, add the silane coupling agent, and stir at 900 r / min at room temperature for 45 minutes; S2. Add the dried ethylene-vinyl acetate copolymer, modified polyvinyl chloride, and modified nitrile rubber into a high-speed mixer in sequence. Start stirring at a speed of 550 r / min, heat up to 135 °C, add the antibacterial agent and stir for 30 minutes, then cool down to 60 °C. Slowly and evenly add the surface-treated aluminum hydroxide, nano-titanium dioxide, antioxidant, lubricant, and plasticizer in sequence. At the same time, increase the stirring speed to 900 r / min and continue stirring for 17 minutes. S3. Set the temperatures of each section of the twin-screw extruder as 150 °C, 160 °C, 165 °C, 170 °C, 170 °C from the feeding section to the head. Preheat and stabilize for 17 minutes. Add the above materials into the feeding section of the twin-screw extruder and stir at a screw speed of 150 r / min. After the materials are plasticized, increase the speed to 250 r / min. The materials are extruded into strips through the head and introduced into a 12 °C cooling water tank for water cooling and solidification. The cooled strips are cut into uniform particles with a diameter of 3 mm and placed in a 70 °C drying oven for drying for 1.5 hours to obtain the cable compound for overhead traveling crane.

[0034] The modified polyvinyl chloride contains the following raw materials in parts by weight: 20 parts of polyvinyl chloride, 15 parts of methyl methacrylate-butadiene-styrene copolymer, 12 parts of polybutylene adipate / terephthalate, 12 parts of carbon nanotubes, 3 parts of stearic acid, 7 parts of nano silver wires, 20 parts of ethanol, 2 parts of polymethylhydrosiloxane, 7 parts of nano zinc oxide, 4 parts of aluminum tripolyphosphate, and 15 parts of epoxidized soybean oil. The specific preparation steps of the modified polyvinyl chloride are as follows: A1. Put the carbon nanotubes and stearic acid into a high-speed mixer and stir at a speed of 1250 r / min for 25 minutes. The nano silver wires are ultrasonically dispersed with an ethanol solution for 25 minutes, and the ultrasonic power is controlled at 250 watts. Then dry in a 70 °C vacuum drying oven for 1.5 hours. A2. First, slowly pour the polyvinyl chloride raw materials into a high-speed mixer and stir at a speed of 400 r / min. At the same time, heat up to 125 °C at a rate of 5 °C per minute and keep it constant. Increase the mixer speed to 1250 r / min and slowly add the methyl methacrylate-butadiene-styrene copolymer, and stir for 35 minutes. Heat up to 175 °C and add the polybutylene adipate / terephthalate, and stir at a speed of 1250 r / min for 12 minutes to obtain the first-modified polyvinyl chloride. A3. Transfer all of the polyvinyl chloride after the first modification to a reaction kettle, stir at a speed of 200 r / min, slowly add polymethylhydrogensiloxane, and after stirring for 25 minutes, slowly add nano-zinc oxide and aluminum tripolyphosphate. Close the feed inlet of the reaction kettle, increase the temperature to 150 °C at a heating rate of 3 °C per minute, and under the stirring condition of 200 r / min, continuously stir and react for 45 minutes. Then add the pretreated conductive filler and continue to stir for 12 minutes to obtain the second-modified polyvinyl chloride. A4. Transfer all of the polyvinyl chloride after the second modification to a stirring container, stir at a speed of 300 r / min, slowly add epoxidized soybean oil to the container, increase the temperature to 115 °C at a heating rate of 2 °C per minute and keep it constant, and under the stirring condition of 350 r / min, continuously stir for 25 minutes to obtain the modified polyvinyl chloride.

[0035] The modified nitrile rubber contains the following raw materials in parts by weight: 40 parts of nitrile rubber, 5 parts of magnesium hydroxide flame retardant, 6 parts of microencapsulated red phosphorus flame retardant, 12 parts of polybutylene adipate / terephthalate, 7 parts of 1,6-hexanedithiol, and 7 parts of boron nitride nanosheets.

[0036] The specific preparation steps of the modified nitrile rubber are as follows: B1. Preheat the internal mixer to 135 °C, set the rotation speed to 35 r / min, slowly add nitrile rubber, and after it softens, increase the rotation speed to 55 r / min and plasticize for 7 minutes; add the magnesium hydroxide flame retardant in three portions, with an interval of 3 minutes between each addition, and keep stirring at 55 r / min during the addition process. After the addition, continue to stir for 12 minutes; similarly, add the microencapsulated red phosphorus flame retardant in three portions, with an interval of 3 minutes between each addition, and keep stirring at 55 r / min during the addition process. After adding the flame retardant, increase the stirring speed to 85 r / min and continue internal mixing for 17 minutes, increase the temperature to 160 °C, add polybutylene adipate / terephthalate and internal mix for 12 minutes. After the internal mixing is completed, cool down to 90 °C and take out the first-modified nitrile rubber. B2. Preheat the high-speed mixer to 115 °C, start stirring at a speed of 550 r / min, slowly add the first-modified nitrile rubber to the high-speed mixer, and continue to stir for 7 minutes after reaching the set temperature; slowly and evenly add 1,6-hexanedithiol, and at the same time increase the rotation speed to 900 r / min and stir for 25 minutes; after the stirring is completed, wait for the material temperature to drop to 75 °C and take out the second-modified nitrile rubber. B3. Set the temperatures of each section of the twin-screw extruder, which are 120°C, 130°C, 140°C, 145°C, and 150°C in sequence from the feeding section to the die head, and preheat and stabilize for 17 minutes; slowly add small pieces of nitrile rubber after the second modification to the feeding section of the twin-screw extruder and start at a screw speed of 150 r / min; after it is plasticized, raise it to 250 r / min; at the side feeding port of the twin-screw extruder, add boron nitride nanosheets at a uniform speed, add boron nitride nanosheets evenly from the side feeding port, control to finish adding in 12 minutes, then raise the screw speed to 350 r / min and stir for 17 minutes; the extruded material is cut into particles with a diameter of 3 mm by a pelletizer to obtain the modified nitrile rubber.

[0037] Comparative Example 1 In this comparative example, compared with Example 2, modified polyvinyl chloride is not added, and the remaining steps are the same.

[0038] Comparative Example 2 In this comparative example, compared with Example 2, modified nitrile rubber is not added, and the remaining steps are the same.

[0039] Performance Test It can be seen from the test data in the table that for the amounts of various substances added and operating conditions in Example 2, compared with the amounts of substances added and operating conditions in Example 1 and Example 3, the various test data of the corrosion-resistant cable compound for overhead traveling crane made are more remarkable. In Comparative Example 1, modified polyvinyl chloride is not added, and compared with Example 2, it can be seen that the test results of tensile strength, flexibility effect, wear resistance effect, anti-electromagnetic interference, weather resistance, and chemical corrosion resistance are significantly worse than those of the compound with added modified polyvinyl chloride. In Comparative Example 2, modified nitrile rubber is not added, and compared with Example 2, its flame retardant effect and self-healing effect are lacking. Therefore, the cable compound for overhead traveling crane with added modified polyvinyl chloride and modified nitrile rubber has more excellent effects. The above content is only an example and explanation of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined by this claim book, they should all belong to the protection scope of the present invention.

Claims

1. A corrosion-resistant driving cable assembly, characterized in that: The invention comprises the following raw materials in parts by weight: 40-60 parts of ethylene-vinyl acetate copolymer, 15-25 parts of modified polyvinyl chloride, 10-20 parts of modified nitrile rubber, 20-30 parts of aluminum hydroxide, 5-10 parts of nano titanium dioxide, 5-10 parts of silane coupling agent, 3-8 parts of antibacterial agent, 1-3 parts of antioxidant, 1-3 parts of lubricant and 3-5 parts of plasticizer.

2. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The weight average molecular weight of the ethylene-vinyl acetate copolymer is 150,000.

3. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The modified polyvinyl chloride comprises the following raw materials in parts by weight: 15-25 parts of polyvinyl chloride, 10-20 parts of methyl methacrylate-butadiene-styrene copolymer, 10-15 parts of polybutylene adipate / terephthalate, 10-15 parts of carbon nanotubes, 1-5 parts of stearic acid, 5-10 parts of nano silver wires, 15-25 parts of ethanol, 1-3 parts of polymethyl hydrogen siloxane, 5-10 parts of nano zinc oxide, 3-5 parts of aluminum tripolyphosphate, and 10-20 parts of epoxidized soybean oil; The modified polyvinyl chloride is specifically prepared in the following steps: A1. Place carbon nanotubes and stearic acid in a high-speed mixer and stir at a speed of 1000-1500 r / min for 20-30 minutes. Perform ultrasonic dispersion treatment on the nanosilver wires with an ethanol solution for 20-30 minutes with an ultrasonic power controlled at 200-300 watts. Then dry in a vacuum drying oven at 60-80°C for 1-2 hours. A2, first slowly pour the polyvinyl chloride raw material into a high-speed stirrer, stir at a speed of 300-500r / min, and heat it to 120-130°C at 5°C / min and keep the temperature constant; increase the stirrer speed to 1000-1500r / min, slowly add methyl methacrylate-butadiene-styrene copolymer, and stir for 30-40 minutes; heat it to 160-190°C, add polybutylene adipate / terephthalate, and stir at a speed of 1000-1500r / min for 10-15 minutes to obtain the first modified polyvinyl chloride; A3, the first modified polyvinyl chloride was transferred to the reactor, stirred at a speed of 100-300r / min, polymethyl hydrogen siloxane was slowly added, and after stirring for 20-30 minutes, nano zinc oxide and aluminum tripolyphosphate were slowly added, the reactor feed port was closed, the temperature was increased to 140-160°C at a heating rate of 3°C / min, and the stirring was continued at 100-300r / min for 30-60 minutes, and then the pretreated conductive filler was added, and the stirring was continued for 10-15 minutes to obtain the second modified polyvinyl chloride; A4. Transfer all the polyvinyl chloride after the second modification to a stirring container, stir at a speed of 200-400r / min, slowly add the epoxidized soybean oil into the container, increase the temperature to 110-120°C at a heating rate of 2°C / min and keep the temperature constant, continue stirring for 20-30 minutes at a stirring rate of 200-500r / min to obtain modified polyvinyl chloride.

4. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The modified nitrile rubber comprises the following raw materials in parts by weight: 30-50 parts of nitrile rubber, 3-7 parts of magnesium hydroxide flame retardant, 5-8 parts of microcapsule red phosphorus flame retardant, 10-15 parts of polybutylene adipate / terephthalate, 5-10 parts of 1,6-hexanedithiol, and 5-10 parts of boron nitride nanosheets; The modified nitrile rubber is specifically prepared in the following steps: B1. Preheat the mixer to 130-140°C, set the speed to 30-40r / min, slowly add the nitrile rubber, and after it softens, increase the speed to 50-60r / min, and plasticize for 5-10 minutes; add the magnesium hydroxide flame retardant three times, with an interval of 2-4 minutes between each addition, keep stirring at 50-60r / min during the addition, and continue stirring for 10-15 minutes after the addition; also add the microcapsule red phosphorus flame retardant three times, with an interval of 2-4 minutes between each addition, keep stirring at 50-60r / min during the addition, after the flame retardant is added, increase the stirring speed to 80-90r / min, continue to banbury for 15-20 minutes, heat up to 150-170°C, add poly(adipate / butylene terephthalate) and banbury for 10-15 minutes, after the banburying is completed, cool down to 80-100°C, and take out the nitrile rubber after the first modification; B2. Preheat the high-speed mixer to 110-120°C, start stirring at 500-600r / min, slowly add the first modified nitrile rubber into the high-speed mixer, and continue stirring for 5-10 minutes after reaching the set temperature; slowly add 1,6-hexanedithiol at a uniform speed, increase the speed to 800-1000r / min, and stir for 20-30 minutes; after stirring, wait until the material temperature drops to 70-80°C, and take out the second modified nitrile rubber; B3, set the temperature of each section of the twin screw extruder, from the feeding section to the die head, it is 120 ℃, 130 ℃, 140 ℃, 145 ℃, 150 ℃ successively, preheat and stabilize for 15-20 minutes; The nitrile rubber block after the second modification is slowly added into the feeding section of the twin screw extruder through the feeding hopper, and the screw speed is started at 100-200r / min; After it is plasticized, it is increased to 200-300r / min; At the side feeding port of the twin screw extruder, boron nitride nanosheets are added at a uniform speed, and boron nitride nanosheets are evenly added from the side feeding port, and the addition is completed in 10-15 minutes, and then the screw speed is increased to 300-400r / min, and stirred for 15-20 minutes; The extruded material is cut into 2-4mm diameter particles through a pelletizer to obtain modified nitrile rubber.

5. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The silane coupling agent is one of KH550 and KH560.

6. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The antioxidant is one of antioxidant 1010, antioxidant 1076 and antioxidant 2246.

7. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The lubricant is one of paraffin wax and polyethylene wax.

8. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The plasticizer is one of trioctyl trimellitate and tricresyl phosphate.

9. The corrosion-resistant driving cable assembly according to claim 1, characterized in that: The antibacterial agent is one of JL-1062 rubber cable antibacterial and mildew-proof agent and PVC antibacterial and mildew-proof agent OBF10.

10. The method for preparing a corrosion-resistant driving cable assembly according to claim 1, characterized in that: The specific steps include: S1. Put ethylene-vinyl acetate copolymer, modified polyvinyl chloride and modified nitrile rubber into a blast drying oven and dry them at 80-100° C. for 2-3 hours; put aluminum hydroxide and nano titanium dioxide into a high-speed mixer, add silane coupling agent, and stir at 800-1000 r / min at room temperature for 30-60 minutes; S2, the dried ethylene-vinyl acetate copolymer, modified polyvinyl chloride, modified nitrile rubber are added to the high-speed mixer in sequence, stirring is started, stirring at a speed of 500-600r / min, the temperature is raised to 120-150°C, an antibacterial agent is added and stirred for 20-40 minutes, the temperature is lowered to 50-70°C, and the surface-treated aluminum hydroxide, nano-titanium dioxide and antioxidant, lubricant and plasticizer are added in sequence at a slow and uniform speed, and the stirring speed is increased to 800-1000r / min, and stirring is continued for 15-20 minutes; S3. Set the temperature of each section of the twin-screw extruder to 150°C, 160°C, 165°C, 170°C, and 170°C from the feeding section to the die, preheat and stabilize for 15-20 minutes; add the above materials to the feeding section of the twin-screw extruder, stir at a screw speed of 100-200r / min, and increase to 200-300r / min after the materials are plasticized; extrude the materials into strips through the die, introduce them into a 10-15°C cooling water tank for water cooling and solidification; cut the cooled strips into uniform particles with a diameter of 2-4mm, put them into a drying oven at 60-80°C and dry them for 1-2 hours to obtain the crane cable composite material.

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