Radiation-resistant cable, preparation method thereof and application of radiation-resistant cable in robot

Abstract

The invention relates to the technical field of high polymer materials, and discloses a radiation-resistant cable, a preparation method thereof and application of the radiation-resistant cable in a robot. The radiation-resistant cable comprises a wire core, an insulating layer, a shielding layer and a protective layer which are sequentially arranged from inside to outside, wherein the protective layer comprises the following components in parts by weight: 90-120 parts of matrix resin and 10-20 parts of phenol-containing polymer; wherein the phenol-containing polymer is obtained by polymerizing 2, 4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid according to a molar ratio of 2: (0.5 to 2): (1 to 3); the matrix resin comprises polyethylene resin and polyvinyl chloride resin. The phenol-containing polymer obtained by polymerizing the 2, 4-diaminophenol, the 4-aminocyclohexanecarboxylic acid and the sebacic acid according to a specific ratio is used, so that the radiation resistance of the protective layer taking the polyethylene resin and the polyvinyl chloride resin as matrix resins is improved, and the cable prepared by using the protective layer has the radiation resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and more particularly to a radiation-resistant cable, a preparation method thereof, and an application thereof in a robot. Background Art

[0002] The main components of the robot structure include mechanical structure, drive system, perception system, control system, end effector, energy system and interactive system, etc. Cables are the key medium for power and signal transmission of robots. They can be used as a connection medium to connect the robot's mechanical structure, drive system, perception system, control system, end effector, energy system and interactive system, etc., so that the robot can complete various instructions.

[0003] From the inside out, a cable consists of a core (conductor), insulation, shielding, and protective layer. The protective layer, as the cable's outermost layer, often needs to possess properties such as wear resistance and radiation resistance to adapt to different operating environments. In some extreme environments, such as the nuclear industry, aerospace, and medical equipment, robots may be exposed to high-energy rays or radiation. Therefore, using radiation-resistant cables, meaning the protective layer must also be radiation-resistant, can improve the robot's reliability and safety. Polyethylene and polyvinyl chloride resins are also used as the base resins for the protective layer due to their excellent insulating properties.

[0004] Therefore, it is of great significance to develop a radiation-resistant cable with polyethylene resin and polyvinyl chloride resin as the base resin of the protective layer and the protective layer having radiation resistance. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a radiation-resistant cable, a preparation method thereof, and an application thereof in a robot.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] In a first aspect, the present invention provides a radiation-resistant cable comprising a core, an insulation layer, a shielding layer, and a protective layer arranged in sequence from the inside to the outside, wherein the protective layer comprises the following components in parts by weight:

[0008] 90-120 parts of base resin, 10-20 parts of phenol-containing polymer;

[0009] wherein the phenol-containing polymer is obtained by polymerizing 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid, and sebacic acid in a molar ratio of 2:(0.5-2):(1-3);

[0010] The matrix resin includes polyethylene resin and polyvinyl chloride resin.

[0011] The present invention improves the radiation resistance of a protective layer with polyethylene resin and polyvinyl chloride resin as matrix resins by using a phenol-containing polymer obtained by polymerizing 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid in a specific ratio, thereby making the cable prepared using the protective layer have radiation resistance, that is, obtaining a radiation-resistant cable.

[0012] Specifically, in the phenol-containing polymer, 2,4-diaminophenol provides a phenol structure that can reduce the degradation effect of radiation on the material by capturing free radicals, thereby improving the radiation resistance of the protective layer; and the phenol-containing polymer obtained by polymerizing 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid has a network structure, which can stably and uniformly fix the phenol structure, which is beneficial to improving the radiation resistance of the protective layer; at the same time, the chain segments provided by 4-aminocyclohexanecarboxylic acid and sebacic acid with different flexibility can improve the compatibility between the network structure of the phenol-containing polymer and the matrix resin, which is beneficial to the uniform dispersion of the phenol-containing polymer in the matrix resin, thereby improving the radiation resistance of the protective layer.

[0013] In addition, the use of the phenol-containing polymer in a network structure can also improve the wear resistance and corrosion resistance of the protective layer.

[0014] Preferably, the molar ratio of 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid is 2:0.5:1, 2:0.5:1.5, 2:0.5:2, 2:0.5:2.5, 2:0.5:3, 2:1:1, 2:1:1.5, 2:1:2, 2:1:2.5, 2:1:3, 2:1.5:1, 2:1.5:1.5, 2:1.5:2, 2:1.5:2.5, 2:1.5:3, 2:2:1, 2:2:1.5, 2:2:2, 2:2:2.5, 2:2:3.

[0015] Preferably, the molar ratio of 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid is 2:(0.5-1.5):(2-3).

[0016] Preferably, the preparation method of the phenol-containing polymer is as follows: 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid are polymerized through a condensation reaction under the action of a catalyst to obtain the phenol-containing polymer.

[0017] Any catalyst that can be used in the art to catalyze the polymerization of 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid, and sebacic acid through a condensation reaction can be used in the present invention. For example, the catalyst includes at least one of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC·HCl), N-hydroxysuccinimide (NHS), dicyclohexylcarbodiimide (DCC), diisopropylcarbodiimide (DIC), and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide (EDCI). When the catalyst is 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC·HCl) or N-hydroxysuccinimide (NHS), the molar ratio of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC·HCl) to N-hydroxysuccinimide (NHS) is 1:(0.4-1.5).

[0018] More preferably, the molar ratio of the catalyst to sebacic acid is 1:(0.5-2).

[0019] Preferably, the polymerization reaction temperature is 15-65° C., and the reaction time is 0.5-24 h.

[0020] Preferably, the weight ratio of the polyethylene resin to the polyvinyl chloride resin is within the range of one or any two of 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, and 1:2.

[0021] More preferably, the weight ratio of the polyethylene resin to the polyvinyl chloride resin is 1:(0.5-2).

[0022] Preferably, the polyethylene resin is at least one of low-density polyethylene (LDPE), high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE).

[0023] Preferably, the melt flow rate (MFR) of the polyethylene resin at 190°C and a load of 2.16 kg is 1 g / 10 min, 1.5 g / 10 min, 2 g / 10 min, 2.5 g / 10 min, 3 g / 10 min, 3.5 g / 10 min, 4 g / 10 min, 4.5 g / 10 min, 5 g / 10 min, 5.5 g / 10 min, 6 g / 10 min, 6.5 g / 10 min, 7 g / 10 min, 7.5 g / 10 min, 8 g / 10 min, 8.5 g / 10 min, 9 g / 10 min, or any two of the range values.

[0024] More preferably, the polyethylene resin has a melt flow rate (MFR) of 1-9 g / 10 min at 190° C. and a load of 2.16 kg.

[0025] More preferably, the polyethylene resin has a melt flow rate (MFR) of 2-8 g / 10 min, specifically 2-4 g / 10 min, at 190° C. and a load of 2.16 kg.

[0026] In the present invention, the melt flow rate of the polyethylene resin at 190° C. and a load of 2.16 kg is measured according to the ISO1133-2019 standard.

[0027] Preferably, the degree of polymerization of the polyvinyl chloride resin is within the range of one or any two of 600, 650, 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500, 1550, 1600, 1650, 1700, 1750, 1800, 1850, and 1900.

[0028] More preferably, the degree of polymerization of the polyvinyl chloride resin is 600-1900.

[0029] More preferably, the degree of polymerization of the polyvinyl chloride resin is 700-1800, specifically 700-1000.

[0030] In the present invention, the degree of polymerization of the polyvinyl chloride resin is measured according to the standard GB / T5761-2006 "Suspension Method General-purpose Polyvinyl Chloride Resin".

[0031] Preferably, the protective layer further comprises at least one of a filler, a plasticizer, a lubricant, and a stabilizer.

[0032] More preferably, the filler includes at least one of silicon carbide (SiC), talc, boron nitride (BN), graphite, diatomaceous earth, and kaolin.

[0033] The present invention facilitates the movement of the phenol-containing polymer in the network structure within the matrix resin by using a filler, enabling the phenol-containing polymer to be more evenly dispersed within the matrix resin, thereby further improving the radiation resistance of the protective layer. Furthermore, the use of the filler further enhances the wear resistance and corrosion resistance of the protective layer.

[0034] More preferably, the filler comprises silicon carbide and talc in a weight ratio of 1:(0.5-1.5).

[0035] More preferably, the weight ratio of silicon carbide to talc is within the range of one or any two of 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, and 1:1.5.

[0036] More preferably, the average particle size of the silicon carbide is 100-300 nm.

[0037] More preferably, the average particle size of the silicon carbide is within the range of one or any two of 100 nm, 120 nm, 150 nm, 170 nm, 200 nm, 220 nm, 250 nm, 270 nm, and 300 nm.

[0038] The average particle size of the silicon carbide described in the present invention is measured by Malvern Mastersizer 3000 laser particle size analysis in accordance with GB / T29022-2012 "Particle Size Analysis Dynamic Light Scattering (DLS)" standard.

[0039] More preferably, the mesh size of the talc powder is 2000-8000 mesh.

[0040] More preferably, the mesh size of the talc powder is one or any two of 2000 mesh, 2500 mesh, 3000 mesh, 3500 mesh, 4000 mesh, 4500 mesh, 5000 mesh, 5500 mesh, 6000 mesh, 6500 mesh, 7000 mesh, 7500 mesh, and 8000 mesh.

[0041] More preferably, the weight proportion of the filler is within the range of one or any two of 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts.

[0042] More preferably, the weight proportion of the filler is 10-20 parts.

[0043] Commonly used plasticizers in the art can be used in the present invention, for example, the plasticizer is at least one of dioctyl adipate (DOA), dioctyl sebacate, di-n-hexyl sebacate (DHS), tributyl citrate (TBC) and acetyl tributyl citrate (ATBC).

[0044] More preferably, the weight proportion of the plasticizer is within the range of one or any two of 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, and 10 parts.

[0045] More preferably, the weight portion of the plasticizer is 3-10 parts.

[0046] Lubricants commonly used in the art can be used in the present invention, for example, the lubricant is at least one of polyethylene wax, stearic acid, and pentaerythritol stearate.

[0047] More preferably, the weight proportion of the lubricant is one or any two of 1 part, 1.2 parts, 1.5 parts, 1.7 parts, 1.8 parts, 2 parts, 2.2 parts, 2.5 parts, 2.7 parts, 2.8 parts, 3 parts, 3.2 parts, 3.5 parts, 3.7 parts, 3.8 parts, and 4 parts.

[0048] More preferably, the weight portion of the lubricant is 1-4 parts.

[0049] Commonly used stabilizers in the art can be used in the present invention, for example, the stabilizer is at least one of a calcium zinc stabilizer and calcium stearate. The calcium zinc stabilizer includes but is not limited to at least one of a calcium zinc heat stabilizer CZ-116 and a calcium zinc heat stabilizer CZ-113.

[0050] More preferably, the weight proportion of the stabilizer is 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts or any two of the range values.

[0051] More preferably, the weight portion of the stabilizer is 0.5-2 parts.

[0052] Preferably, the weight proportion of the base resin is one of or any two of 90, 92, 95, 97, 100, 102, 105, 107, 110, 112, 115, 117, and 120 parts; and the weight proportion of the phenol-containing polymer is one of or any two of 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 parts.

[0053] Preferably, the material of the wire core is one of pure copper, pure aluminum, copper alloy and magnesium alloy.

[0054] Preferably, the insulating layer comprises at least one of polyethylene and polyvinyl chloride.

[0055] Preferably, the shielding layer includes at least one of a copper tape and an aluminum tape.

[0056] In a second aspect, the present invention provides a method for preparing a radiation-resistant cable, comprising the following steps:

[0057] S1. Extruding the raw material of the insulating layer onto the surface of the core to obtain a core coated with an insulating layer;

[0058] S2. The wire core coated with the insulating layer is wrapped with the raw material of the shielding layer to obtain a wire core coated with the shielding layer;

[0059] S3. Extruding the raw material of the protective layer onto the surface of the wire core covered with the shielding layer to obtain a radiation-resistant cable.

[0060] In a third aspect, the present invention provides an application of a radiation-resistant cable in a robot.

[0061] Preferably, the application is the application of the radiation-resistant cable in the preparation of a robot.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] The present invention improves the radiation resistance of a protective layer with polyethylene resin and polyvinyl chloride resin as matrix resins by using a phenol-containing polymer obtained by polymerizing 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid in a specific ratio, thereby making the cable prepared using the protective layer have radiation resistance, that is, obtaining a radiation-resistant cable.

[0064] Specifically, in the phenol-containing polymer, 2,4-diaminophenol provides a phenol structure that can reduce the degradation effect of radiation on the material by capturing free radicals, thereby improving the radiation resistance of the protective layer; and the phenol-containing polymer obtained by polymerizing 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid has a network structure, which can stably and uniformly fix the phenol structure, which is beneficial to improving the radiation resistance of the protective layer; at the same time, the chain segments provided by 4-aminocyclohexanecarboxylic acid and sebacic acid with different flexibility can improve the compatibility between the network structure of the phenol-containing polymer and the matrix resin, which is beneficial to the uniform dispersion of the phenol-containing polymer in the matrix resin, thereby improving the radiation resistance of the protective layer.

[0065] In addition, the use of the phenol-containing polymer in a network structure can also improve the wear resistance and corrosion resistance of the protective layer.

[0066] The present invention facilitates the movement of the phenol-containing polymer in the network structure within the matrix resin by using a filler, enabling the phenol-containing polymer to be more evenly dispersed within the matrix resin, thereby further improving the radiation resistance of the protective layer. Furthermore, the use of the filler further enhances the wear resistance and corrosion resistance of the protective layer. DETAILED DESCRIPTION

[0067] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0068] The experimental methods in the following examples and comparative examples, where specific conditions are not specified, are generally based on conventional conditions in the art or conditions recommended by the manufacturers; the raw materials and reagents used, unless otherwise specified, are all raw materials and reagents that can be obtained from commercial channels such as conventional markets.

[0069] In the various embodiments and comparative examples of the present invention, the use of reagents is as follows:

[0070] Polyethylene resin-1 (PE-1), low-density polyethylene, LDPE 2426K, CNOOC Shell, melt flow rate (MFR) at 190°C and 2.16 kg load is 4 g / 10 min;

[0071] Polyethylene resin-2 (PE-2), low-density polyethylene, LDPE 2420D, CNOOC Shell, melt flow rate (MFR) at 190°C and 2.16 kg load is 2 g / 10 min;

[0072] Polyethylene resin-3 (PE-3), low-density polyethylene, LDPE 722, Dow, USA, with a melt flow rate (MFR) of 8 g / 10 min at 190°C and a load of 2.16 kg;

[0073] Polyethylene resin-4 (PE-4), high-density polyethylene, HDPE 4804, DELTAPOLYMERS, melt flow rate (MFR) at 190°C and 2.16 kg load is 5 g / 10 min;

[0074] Polyvinyl chloride resin-1 (PVC-1), PVC TL-1000, LG, Korea, degree of polymerization 1000;

[0075] Polyvinyl chloride resin-2 (PVC-2), PVC TK-700, Shin-Etsu, Japan, degree of polymerization 700;

[0076] Polyvinyl chloride resin-3 (PVC-3), PVC S-80, Formosa Plastics Industry (Ningbo) Co., Ltd., China, degree of polymerization 1800;

[0077] Silicon carbide-1, with an average particle size of 200 nm, was obtained by crushing S888679 produced by Shanghai Macklin;

[0078] Silicon carbide-2, with an average particle size of 100 nm, was obtained by crushing S888679 produced by Shanghai Macklin;

[0079] Silicon carbide-3, with an average particle size of 300 nm, was obtained by crushing S888679 produced by Shanghai Macklin;

[0080] Talc-1, 3000 mesh, T823197, Shanghai McLean;

[0081] Talc-2, 8000 mesh, T875086, Shanghai McLean;

[0082] Talc-3, 2000 mesh, T823196, Shanghai McLean;

[0083] Kaolin, 3000 mesh, K100132, Shanghai Aladdin;

[0084] Plasticizer, dioctyl adipate (DOA), commercially available;

[0085] Lubricant, stearic acid, commercially available;

[0086] Stabilizer, calcium stearate, commercially available;

[0087] In the present invention, the melt flow rate of the polyethylene resin at 190° C. and 2.16 kg load is measured according to ISO1133-2019 standard;

[0088] In the present invention, the degree of polymerization of the polyvinyl chloride resin is measured according to the standard GB / T5761-2006 "Suspension Method General-purpose Polyvinyl Chloride Resin";

[0089] The average particle size of the silicon carbide described in the present invention is measured by Malvern Mastersizer 3000 laser particle size analysis in accordance with GB / T29022-2012 "Particle Size Analysis Dynamic Light Scattering (DLS)" standard.

[0090] Example 1

[0091] This embodiment provides a radiation-resistant cable, comprising a core, an insulation layer, a shielding layer, and a protective layer arranged in sequence from the inside to the outside. The protective layer comprises the following components in parts by weight:

[0092] 100 parts base resin, 15 parts phenol-containing polymer, 15 parts filler, 6 parts plasticizer, 2 parts lubricant, 1 part stabilizer;

[0093] The preparation method of the phenol-containing polymer comprises the following steps: adding sebacic acid to ethanol, stirring and dissolving the mixture, then adding catalysts 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC·HCl) and N-hydroxysuccinimide (NHS) to activate the carboxyl group for 15 minutes, then adding 2,4-diaminophenol and 4-aminocyclohexanecarboxylic acid to react at 50°C for 8 hours, i.e., polymerizing the mixture through a condensation reaction, dialyzing the mixture with a dialysis bag (molecular weight cut-off 200D) to remove EDC·HCl and NHS, and freeze-drying the mixture to obtain the phenol-containing polymer.

[0094] In the above-mentioned preparation method of the phenol-containing polymer, the molar ratio of 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid is 2:1.5:2, the molar ratio of EDC·HCl and NHS is 1:1, and the molar ratio of the catalyst (EDC·HCl and NHS) to sebacic acid is 1:1;

[0095] The matrix resin is polyethylene resin-1 (PE-1) and polyvinyl chloride resin-1 (PVC-1) in a weight ratio of 1:1;

[0096] The filler is silicon carbide-1 and talc-1 in a weight ratio of 1:1;

[0097] The method for preparing the above-mentioned radiation-resistant cable comprises the following steps:

[0098] S1. Extruding the raw material for the insulation layer (polyvinyl chloride resin-1) onto the surface of a wire core (made of pure copper) at 200°C to obtain a wire core coated with an insulation layer;

[0099] S2. The core wire coated with the insulating layer is wrapped with the raw material of the shielding layer (copper tape) to obtain a core wire coated with the shielding layer;

[0100] S3. Mix the raw materials for the protective layer, and then extrude the mixed raw materials for the protective layer onto the surface of the wire core coated with the shielding layer at 200°C to obtain a radiation-resistant cable.

[0101] Examples 2-5 and Comparative Examples 1-6

[0102] Examples 2-5 and Comparative Examples 1-6 provide different radiation-resistant cables. The difference between them and Example 1 is that the molar ratios of 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid, and sebacic acid in the preparation of the phenol-containing polymer in the protective layer are different. The rest are consistent with Example 1, as shown in the following table:

[0103] Table 1 Molar ratio of 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid in Examples 1-5 and Comparative Examples 1-6

[0104]

[0105]

[0106] Comparative Example 7

[0107] This comparative example provides a radiation-resistant cable, which differs from Example 1 in that succinic acid is used instead of sebacic acid during the preparation of the phenol-containing polymer in the protective layer, that is, the molar ratio of 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and succinic acid is 2:1.5:2, and the rest is consistent with Example 1.

[0108] Examples 6-7

[0109] Examples 6-7 provide different radiation-resistant cables. The difference between them and Example 1 is that the weight ratio of polyethylene resin-1 (PE-1) and polyvinyl chloride resin-1 (PVC-1) in the protective layer is different. The rest is consistent with Example 1, as shown in the following table:

[0110] Table 2 Weight ratio of polyethylene resin-1 and polyvinyl chloride resin-1 in Examples 1, 6-7

[0111]

[0112] Examples 8-10

[0113] Examples 8-10 provide different radiation-resistant cables. The difference between them and Example 1 is that the type of polyethylene resin in the protective layer is different. The rest is consistent with Example 1, as shown in the following table:

[0114] Table 3 Types of polyethylene resins in Examples 1, 8-10

[0115]

[0116]

[0117] Examples 11-12

[0118] Examples 11-12 provide different radiation-resistant cables. The difference between them and Example 1 is that the type of polyvinyl chloride resin in the protective layer is different. The rest is consistent with Example 1, as shown in the following table:

[0119] Table 4 Types of polyvinyl chloride resins in Examples 1, 11-12

[0120] Types of polyvinyl chloride resins Example 1 Polyvinyl chloride resin-1 Example 11 Polyvinyl chloride resin-2 Example 12 Polyvinyl chloride resin-3

[0121] Examples 13-14

[0122] Examples 13-14 provide different radiation-resistant cables. The difference between them and Example 1 is that the weight ratio of silicon carbide-1 and talc-1 in the protective layer is different. The rest is consistent with Example 1, as shown in the following table:

[0123] Table 5 Weight ratio of silicon carbide-1 and talc-1 in Examples 1, 13-14

[0124] Weight ratio of silicon carbide-1 and talc-1 Example 1 1:1 Example 13 1:0.5 Example 14 1:1.5

[0125] Examples 15-16

[0126] Examples 15-16 provide different radiation-resistant cables. The difference between them and Example 1 is that the type of silicon carbide in the protective layer is different. The rest is consistent with Example 1, as shown in the following table:

[0127] Table 6 Types of silicon carbide in Examples 1, 15-16

[0128] Types of silicon carbide Example 1 Silicon Carbide-1 Example 15 Silicon Carbide-2 Example 16 Silicon Carbide-3

[0129] Examples 17-18

[0130] Examples 17-18 provide different radiation-resistant cables. The difference between them and Example 1 is that the type of talc in the protective layer is different. The rest is consistent with Example 1, as shown in the following table:

[0131] Table 7 Types of talc powder in Examples 1, 17-18

[0132] Types of talcum powder Example 1 Talc-1 Example 17 Talc-2 Example 18 Talc-3 Example 19 Kaolin

[0133] Note: The type of talc in Example 19 is "kaolin", which means that kaolin is used instead of talc for the experiment.

[0134] Example 20

[0135] This embodiment provides a radiation-resistant cable. The difference between this embodiment and embodiment 1 is that the protective layer contains only a matrix resin and a phenol-containing polymer. The rest is the same as in embodiment 1, as follows:

[0136] The protective layer comprises the following components in parts by weight:

[0137] 100 parts base resin, 15 parts phenol-containing polymer.

[0138] Example 21

[0139] This embodiment provides a radiation-resistant cable. The difference between this embodiment and embodiment 1 is that the amounts of the components in the protective layer are different. The rest are the same as those in embodiment 1, as follows:

[0140] The protective layer comprises the following components in parts by weight:

[0141] 90 parts base resin, 10 parts phenol-containing polymer, 10 parts filler, 3 parts plasticizer, 1 part lubricant, 0.5 parts stabilizer.

[0142] Example 22

[0143] This embodiment provides a radiation-resistant cable. The difference between this embodiment and embodiment 1 is that the amounts of the components in the protective layer are different. The rest are the same as those in embodiment 1, as follows:

[0144] The protective layer comprises the following components in parts by weight:

[0145] 120 parts base resin, 20 parts phenol-containing polymer, 20 parts filler, 10 parts plasticizer, 4 parts lubricant, 2 parts stabilizer.

[0146] Performance Testing

[0147] Since the radiation resistance and other properties of the cable of the present invention are mainly provided by the protective layer, the following performance tests were conducted on the protective layers of the embodiments and comparative examples:

[0148] 1. Radiation resistance and corrosion resistance test

[0149] (1) Sample preparation

[0150] The protective layer was removed from the radiation-resistant cable of each embodiment or comparative example, and the protective layer was cut into Type 2 specimens with a length of 150 mm, a width of 10 mm, and a thickness of 1 mm according to GB / T 1040.3-2006. The tensile strength thereof was measured and recorded as Q1 in MPa.

[0151] (2) Radiation resistance test

[0152] The type 2 specimen prepared in (1) was exposed to an irradiance of 0.89 W / m at 90 ± 2 °C. 2 The film was treated in a UV irradiation environment for 36 hours, then taken out and the tensile strength of the protective layer after irradiation was measured according to GB / T 1040.3-2006 standard, recorded as Q2, in MPa, and the radiation resistance loss rate (%) was calculated according to the following formula:

[0153] Radiation resistance loss rate (%) = [(Q1-Q2) / Q1] × 100%;

[0154] The smaller the radiation loss rate (%), the higher the radiation resistance of the protective layer and the higher the radiation resistance of the cable;

[0155] (3) Corrosion resistance test

[0156] The type 2 specimen prepared in (1) was immersed in ethylene glycol at 120°C for 120 h, then taken out and the tensile strength of the protective layer after corrosion was measured according to GB / T 1040.3-2006, recorded as Q3 in MPa, and the corrosion resistance loss rate (%) was calculated according to the following formula:

[0157] Corrosion resistance loss rate (%) = [(Q1-Q3) / Q1] × 100%;

[0158] The smaller the corrosion loss rate (%), the higher the corrosion resistance of the protective layer and the higher the corrosion resistance of the cable;

[0159] 2. Wear resistance test

[0160] At 200°C, the mixed protective layer raw materials of each embodiment or comparative example were hot-pressed into a sample with a length of 30 mm, a width of 10 mm, and a thickness of 6 mm, and weighed, recorded as M1, in g; then, under the conditions of a speed of 200 r / min, a load of 50 N, and a loading time of 30 min, the sample was placed vertically on a vertical universal friction and wear testing machine for testing, and weighed again, recorded as M2, in g; the wear value (g / m 2 ):

[0161] Wear value (g / m 2 )=(M1-M2) / 0.0003

[0162] Wear value (g / m 2 ) is smaller, indicating that the wear resistance of the protective layer is better and the wear resistance of the cable is better;

[0163] The experimental results are shown in the following table:

[0164] Table 8 Performance test results of various embodiments and comparative examples

[0165]

[0166]

[0167] As can be seen from Table 8, the present invention improves the radiation resistance of the protective layer with polyethylene resin and polyvinyl chloride resin as the matrix resin by using a phenol-containing polymer obtained by polymerizing 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid in a specific ratio, so that the cable prepared using the protective layer has radiation resistance, that is, a radiation-resistant cable is obtained.

[0168] In addition, the protective layer of the present invention also has good wear resistance and corrosion resistance.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A radiation-resistant cable, characterized in that: It includes a wire core, an insulating layer, a shielding layer and a protective layer arranged in sequence from the inside to the outside, and the protective layer includes the following components in parts by weight: 90-120 parts of base resin, 10-20 parts of phenol-containing polymer; wherein the phenol-containing polymer is obtained by polymerizing 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid, and sebacic acid in a molar ratio of 2:(0.5-2):(1-3); The matrix resin includes polyethylene resin and polyvinyl chloride resin.

2. The radiation-resistant cable according to claim 1, characterized in that: The molar ratio of the 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid is 2:(0.5-1.5):(2-3).

3. The radiation-resistant cable according to claim 1, wherein: Include at least one of the following (1)-(3): (1) The preparation method of the phenol-containing polymer is as follows: 2,4-diaminophenol, 4-aminocyclohexanecarboxylic acid and sebacic acid are polymerized by condensation reaction under the action of a catalyst to obtain the phenol-containing polymer; (2) The weight ratio of the polyethylene resin to the polyvinyl chloride resin is 1:(0.5-2); (3) The polyethylene resin is at least one of low-density polyethylene, high-density polyethylene and linear low-density polyethylene.

4. The radiation-resistant cable according to claim 1, wherein: Include at least one of the following (1)-(2): (1) The polyethylene resin has a melt flow rate of 1-9 g / 10 min at 190° C. and a load of 2.16 kg; (2) The degree of polymerization of the polyvinyl chloride resin is 600-1900.

5. The radiation-resistant cable according to claim 1, wherein: The protective layer further comprises at least one of a filler, a plasticizer, a lubricant, and a stabilizer.

6. The radiation-resistant cable according to claim 5, characterized in that: Include at least one of the following (1)-(4): (1) The filler includes at least one of silicon carbide, talc, boron nitride, graphite, diatomaceous earth, and kaolin; (2) The plasticizer is at least one of dioctyl adipate, dioctyl sebacate, di-n-hexyl sebacate, tributyl citrate and acetyl tributyl citrate; (3) The lubricant is at least one of polyethylene wax, stearic acid, and pentaerythritol stearate; (4) The stabilizer is at least one of a calcium zinc stabilizer and calcium stearate.

7. The radiation-resistant cable according to claim 6, characterized in that: Include at least one of the following (1)-(3): (1) The filler comprises silicon carbide and talc in a weight ratio of 1: (0.5-1.5); (2) The average particle size of the silicon carbide is 100-300 nm; (3) The mesh size of the talcum powder is 2000-8000 mesh.

8. The radiation-resistant cable according to claim 5, characterized in that: Include at least one of the following (1)-(4): (1) The weight proportion of the filler is 10-20 parts; (2) The weight portion of the plasticizer is 3-10 parts; (3) The weight portion of the lubricant is 1-4 parts; (4) The weight portion of the stabilizer is 0.5-2 parts.

9. A method for preparing a radiation-resistant cable according to any one of claims 1 to 8, characterized in that: The steps include: S1. Extruding the raw material of the insulating layer onto the surface of the core to obtain a core coated with an insulating layer; S2. The wire core coated with the insulating layer is wrapped with the raw material of the shielding layer to obtain a wire core coated with the shielding layer; S3. Extruding the raw material of the protective layer onto the surface of the wire core covered with the shielding layer to obtain a radiation-resistant cable.

10. Use of the radiation-resistant cable according to any one of claims 1 to 8 in a robot.

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