Wear-resistant nylon rod and preparation method thereof

Abstract

The present invention relates to the technical field of polymer materials, and discloses a wear-resistant nylon rod and a preparation method thereof. The nylon rod in the present invention comprises the following raw materials in percentage by mass: 45-65% nylon 6, 12-25% glass fiber, 5-8% nano-silicon dioxide, 8-15% wear-resistant modifier, 4-8% toughening agent, 0.5-2% silane coupling agent, 0.5-1.5% lubricant, 0.1-0.3% antioxidant, and 0.5-2% thermal stabilizer; the nylon rod is made of nylon 6 as the main material, and functional additives such as wear-resistant modifier, toughening agent, and glass fiber are added to improve the wear resistance of the substrate; wherein the wear-resistant modifier has a structure similar to that of a microcapsule, which can break when the substrate material is rubbed, releasing the modified base oil inside, thereby achieving wear resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to a wear-resistant nylon rod and a preparation method thereof. Background Art

[0002] Nylon (also known as polyamide (PA)) is an important class of thermoplastic engineering plastics. In numerous mechanical and industrial applications, friction and wear between components are a major cause of equipment failure, performance degradation, increased energy consumption, and elevated maintenance costs. This is particularly true in harsh operating conditions, such as those without lubrication (dry friction) or boundary lubrication, and in the presence of abrasive particles and dust. While traditional metal materials offer high strength, they have limitations in terms of wear resistance, friction reduction (low coefficient of friction), anti-seizure properties, and lubricant dependence.

[0003] While pure nylon (such as PA6 and PA66) has basic wear resistance, its wear resistance is still insufficient under high load, high speed, high temperature, or extremely harsh dry friction conditions. In environments containing hard abrasive particles such as sand, dust, and metal chips, pure nylon may experience rapid abrasive wear. In conditions where frictional heat is significantly generated, the increased surface temperature of the material can lead to a decrease in strength and modulus, exacerbating plastic deformation and wear. Therefore, it is necessary to develop a nylon rod with excellent self-lubricity and wear resistance to overcome the wear resistance limitations of pure nylon and meet the needs of more demanding industrial applications. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a wear-resistant nylon rod and a preparation method thereof.

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

[0006] A wear-resistant nylon rod comprises the following raw materials in percentage by mass: 45-65% nylon 6, 12-25% glass fiber, 5-8% nano-silicon dioxide, 8-15% wear-resistant modifier, 4-8% toughening agent, 0.5-2% silane coupling agent, 0.5-1.5% lubricant, 0.1-0.3% antioxidant, and 0.5-2% heat stabilizer;

[0007] Furthermore, the toughening agent is maleic anhydride grafted POE;

[0008] Furthermore, the silane coupling agent is one of KH550 and KH560;

[0009] Furthermore, the lubricant is silicone masterbatch;

[0010] Furthermore, the antioxidant is one of antioxidant 1010, antioxidant 1098 or antioxidant 1076;

[0011] Furthermore, the heat stabilizer is a copper salt heat stabilizer;

[0012] The wear-resistant modifier is prepared by the following steps:

[0013] Step A1: Add 5,6-dimethylbenzimidazole, 10-chloro-1-decanol, tetrabutylammonium bromide, sodium hydroxide, and water to a grinding jar, then add 12 5-9 mm stainless steel balls, grind in a planetary ball mill at 350-450 rpm for 1-2 hours, wash, filter, and dry to obtain a benzimidazole derivative;

[0014] Furthermore, in step A1, the ratio of 5,6-dimethylbenzimidazole, 10-chloro-1-decanol, tetrabutylammonium bromide, sodium hydroxide and water is 0.1-0.2 mol: 0.12-0.24 mol: 0.0015-0.003 mol: 0.75-1.5 g: 2-4 mL;

[0015] Step A2: adding a benzimidazole derivative and boric acid to toluene, mixing and stirring uniformly, heating to 100-110° C. and reflux reaction for 6-8 hours, distilling under reduced pressure, and drying to obtain a modified additive;

[0016] Furthermore, in step A2, the ratio of the benzimidazole derivative, boric acid and toluene is 0.03-0.09 mol:0.01-0.03 mol:200 mL;

[0017] Step A3: adding the modifying additive to the PAO base oil and mixing and stirring uniformly to obtain the modified base oil; mixing and stirring the modified base oil and polyethersulfone (PES) in dichloromethane to obtain a mixture 1; stirring gelatin and water in a 70°C water bath at 300-500 rpm for 30-50 minutes, then cooling to 30°C and stirring at 700-800 rpm, and adding the mixture 1 dropwise over 20-30 minutes. Then, heating to 40°C and stirring at 400 rpm for 3-5 hours, centrifuging, washing, and drying to obtain the PES@base oil;

[0018] Furthermore, in step A3, the ratio of gelatin, water and mixed solution 1 is 2-6 g:100 g:20 mL;

[0019] Furthermore, in the mixed solution 1 of step A3, the amount ratio of modified base oil, PES and dichloromethane is 0.6-1g:1g:20mL;

[0020] Furthermore, the amount of the modifying additive added to the modified base oil in step A3 is 0.5wt%-1.5wt%, and the rest is base oil PAO;

[0021] Step A4: uniformly mix maleic anhydride in benzene, add styrene and PES@base oil, heat to 45-55°C under nitrogen, slowly add benzoyl peroxide solution dropwise, then heat to 75-85°C and stir for 3.5-4.5 hours, filter, wash, and dry to obtain a wear-resistant modifier;

[0022] Furthermore, in step A4, the ratio of maleic anhydride, benzene, styrene, PES@base oil and benzoyl peroxide solution is 0.01-0.02 mol:100 mL:0.01-0.022 mol:5-10 g:5 mL;

[0023] Furthermore, the ratio of benzoyl peroxide to benzene in the benzoyl peroxide-benzene solution in step A4 is 0.001-0.003 g:5 mL.

[0024] A method for preparing a wear-resistant nylon rod comprises the following steps:

[0025] Step S1, weighing raw materials according to mass percentage, mixing nylon 6, wear-resistant modifier and toughening agent in a blender, then adding nano-silica, silane coupling agent, lubricant, antioxidant and heat stabilizer and mixing and stirring to obtain a premix;

[0026] Step S2: feeding the premix into the main feed port of the twin-screw extruder, and then feeding the glass fiber into the side feed port, and then extruding, cooling, pelletizing, and homogenizing after melting to obtain the wear-resistant nylon rod;

[0027] Furthermore, in step S2, the speed of the twin-screw extruder is 400-600 rpm, the temperature of the feeding section is 230°C-250°C, the temperature of the melting section is 265°C-285°C, and the temperature of the head section is 255°C-265°C.

[0028] Beneficial effects of the present invention:

[0029] The nylon rod in the present invention is made of nylon 6 as the main material, and functional additives such as wear-resistant modifiers, toughening agents, and glass fibers are added to improve the wear resistance of the base. Among them, the wear-resistant modifier has a structure similar to that of a microcapsule, which can break when the base material is rubbed, releasing the modified base oil inside to achieve wear resistance.

[0030] The wear-resistant modifier prepared in this invention differs from traditional lubricants in that its intact presence in the matrix ensures maximum lubrication and minimizes its impact on other matrix properties. Furthermore, the addition of a small amount of silicone masterbatch lubricant to the nylon rod of this invention primarily improves processing fluidity and reduces friction and wear between the matrix and processing equipment.

[0031] The wear-resistant modifier prepared by the present invention has a structure similar to that of a microcapsule, including an internal modified base oil, a sub-outer polyethersulfone layer, and an outermost functional polymer. During the friction process, the structure will rupture under the action of friction force and friction heat, releasing the internal modified base oil to the friction interface to participate in lubrication, forming a lubricating oil film at the friction interface, avoiding direct contact between the friction object and the base material, and the microcapsule cavity after release can collect wear debris to prevent it from causing secondary damage to the friction interface. The modified base oil inside is modified with a modifying additive containing a borate ester structure and a benzimidazole structure. The synergistic effect of the two improves the wear resistance and thermal stability of the modified base oil in the matrix and reduces the volatilization of the internal base oil during high-temperature processing. The sub-outer layer of polyethersulfone coats the modified base oil through solvent volatilization, which has excellent sealing and thermal stability. The outermost layer of functional polymer contains rigid benzene rings and maleic anhydride. This polymer can restrict the movement of the polyethersulfone molecular chains in the sub-outer layer at high temperatures, thereby inhibiting the decomposition of the wear-resistant modifier during high-temperature processing and reducing the performance degradation of the wear-resistant modifier in nylon materials caused by high processing temperatures. In addition, the maleic anhydride groups in the outermost polymer molecular chains can also improve the dispersibility of the wear-resistant modifier in the matrix, further improving the wear resistance of the matrix. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0033] Example 1: A wear-resistant modifier is prepared by the following steps:

[0034] Step A1: 0.1 mol of 5,6-dimethylbenzimidazole, 0.12 mol of 10-chloro-1-decanol, 0.0015 mol of tetrabutylammonium bromide, 0.75 g of sodium hydroxide, and 2 mL of water were added to a grinding jar, and 12 5 mm stainless steel balls were added. The mixture was ground in a planetary ball mill at 350 rpm for 1 h, washed, filtered, and dried to obtain a benzimidazole derivative.

[0035] Step A2: 0.03 mol of a benzimidazole derivative and 0.01 mol of boric acid were added to 200 mL of toluene, mixed and stirred evenly, and heated to 100° C. for reflux reaction for 6 h, and then distilled under reduced pressure and dried to obtain a modified additive;

[0036] Step A3, adding the modifying additive to the base oil PAO and mixing and stirring uniformly to obtain the modified base oil; 0.6g of the modified base oil and 1g of polyethersulfone (PES) were mixed and stirred uniformly in 20mL of dichloromethane to obtain a mixed solution 1; 2g of gelatin and 100g of water were stirred at 300rpm in a 70°C water bath for 30min, then cooled to 30°C and stirred at 700rpm, and the mixed solution 1 was added dropwise over 20min, then heated to 40°C and stirred at 400rpm for 3h, centrifuged, washed, and dried to obtain PES@base oil, wherein the amount of the modifying additive added to the modified base oil was 0.5wt%, and the rest was base oil PAO;

[0037] Step A4, 0.01 mol of maleic anhydride was mixed evenly in 100 mL of benzene, 0.01 mol of styrene and 5 g of PES@ base oil were added, and the mixture was heated to 45 ° C under nitrogen. 5 mL of benzoyl peroxide solution was slowly added dropwise, and then the temperature was raised to 75 ° C. and stirred for 3.5 hours. The mixture was filtered, washed, and dried to obtain a wear-resistant modifier, wherein the ratio of benzoyl peroxide to benzene in the benzoyl peroxide solution was 0.001 g: 5 mL.

[0038] Example 2: The wear-resistant modifier is prepared by the following steps:

[0039] Step A1: 0.15 mol of 5,6-dimethylbenzimidazole, 0.18 mol of 10-chloro-1-decanol, 0.0023 mol of tetrabutylammonium bromide, 1.3 g of sodium hydroxide, and 3 mL of water were added to a grinding jar, and 12 7 mm stainless steel balls were added. The mixture was ground in a planetary ball mill at 400 rpm for 1.5 h, washed, filtered, and dried to obtain a benzimidazole derivative.

[0040] Step A2: 0.06 mol of a benzimidazole derivative and 0.02 mol of boric acid were added to 200 mL of toluene, mixed and stirred evenly, and heated to 105° C. for reflux reaction for 7 h, and then distilled under reduced pressure and dried to obtain a modified additive;

[0041] Step A3, adding the modifying additive to the base oil PAO and mixing and stirring uniformly to obtain the modified base oil; 0.8g of the modified base oil and 1g of polyethersulfone (PES) were mixed and stirred uniformly in 20mL of dichloromethane to obtain a mixed solution 1; 4g of gelatin and 100g of water were stirred at 400rpm in a 70°C water bath for 40min, then cooled to 30°C and stirred at 750rpm, and the mixed solution 1 was added dropwise over 25min, then heated to 40°C and stirred at 400rpm for 4h, centrifuged, washed, and dried to obtain PES@base oil, wherein the amount of the modifying additive added to the modified base oil was 1.0wt%, and the rest was base oil PAO;

[0042] Step A4, 0.015 mol of maleic anhydride was mixed evenly in 100 mL of benzene, 0.016 mol of styrene and 7.5 g of PES@ base oil were added, and the mixture was heated to 50 ° C. under nitrogen, and 5 mL of benzoyl peroxide solution was slowly added dropwise. The mixture was then heated to 80 ° C. and stirred for 4 hours. The mixture was filtered, washed, and dried to obtain a wear-resistant modifier, wherein the ratio of benzoyl peroxide to benzene in the benzoyl peroxide solution was 0.002 g: 5 mL.

[0043] Example 3: The wear-resistant modifier is prepared by the following steps:

[0044] Step A1: 0.2 mol of 5,6-dimethylbenzimidazole, 0.24 mol of 10-chloro-1-decanol, 0.003 mol of tetrabutylammonium bromide, 1.5 g of sodium hydroxide, and 4 mL of water were added to a grinding jar, and 12 9 mm stainless steel balls were added. The mixture was ground in a planetary ball mill at 450 rpm for 2 h, washed, filtered, and dried to obtain a benzimidazole derivative.

[0045] Step A2: 0.09 mol of a benzimidazole derivative and 0.03 mol of boric acid were added to 200 mL of toluene, mixed and stirred evenly, and heated to 110° C. for reflux reaction for 8 h, and then distilled under reduced pressure and dried to obtain a modified additive;

[0046] Step A3, adding the modifying additive to the base oil PAO and mixing and stirring uniformly to obtain the modified base oil; 1g of the modified base oil and 1g of polyethersulfone (PES) were mixed and stirred uniformly in 20mL of dichloromethane to obtain a mixed solution 1; 6g of gelatin and 100g of water were stirred at 500rpm in a 70°C water bath for 50min, then cooled to 30°C and stirred at 800rpm, and the mixed solution 1 was added dropwise over 30min, then heated to 40°C and stirred at 400rpm for 5h, centrifuged, washed, and dried to obtain PES@base oil, wherein the amount of the modifying additive added to the modified base oil was 1.5wt%, and the rest was base oil PAO;

[0047] Step A4, 0.02 mol of maleic anhydride was mixed evenly in 100 mL of benzene, 0.022 mol of styrene and 10 g of PES@ base oil were added, and the mixture was heated to 55 ° C. under nitrogen, and 5 mL of benzoyl peroxide solution was slowly added dropwise. The mixture was then heated to 85 ° C. and stirred for 4.5 hours. The mixture was filtered, washed, and dried to obtain a wear-resistant modifier, wherein the ratio of benzoyl peroxide to benzene in the benzoyl peroxide solution was 0.003 g: 5 mL.

[0048] Example 4: A method for preparing a wear-resistant nylon rod comprises the following steps:

[0049] Nylon 6 65%, glass fiber 16.4%, nano-silica 5%, wear-resistant modifier prepared in Example 1 8%, maleic anhydride grafted POE 4%, silane coupling agent KH550 0.5%, silicone masterbatch 0.5%, antioxidant 1010 0.1%, copper salt heat stabilizer 0.5%;

[0050] Step S1, weighing raw materials according to mass percentage, mixing nylon 6, the wear-resistant modifier prepared in Example 1 and maleic anhydride grafted POE in a blender, then adding nano-silica, silane coupling agent KH550, silicone masterbatch, antioxidant 1010 and copper salt heat stabilizer and mixing and stirring uniformly to obtain a premix;

[0051] Step S2: feeding the premix into the main feed port of a twin-screw extruder, feeding the glass fiber into the side feed port, and then extruding, cooling, pelletizing, and homogenizing after melting to obtain a wear-resistant nylon rod, wherein the speed of the twin-screw extruder is 400 rpm, the feeding section temperature is 230°C, the melting section temperature is 265°C, and the head section temperature is 255°C.

[0052] Example 5: A method for preparing a wear-resistant nylon rod comprises the following steps:

[0053] Nylon 6 54.3%, glass fiber 18%, nano-silica 6.5%, wear-resistant modifier prepared in Example 2 12%, maleic anhydride grafted POE 6%, silane coupling agent KH560 1%, silicone masterbatch 1%, antioxidant 1098 0.2%, copper salt heat stabilizer 1%;

[0054] Step S1, weighing raw materials according to mass percentage, mixing nylon 6, the wear-resistant modifier prepared in Example 2 and maleic anhydride grafted POE in a blender, then adding nano-silica, silane coupling agent KH560, silicone masterbatch, antioxidant 1098 and copper salt heat stabilizer and mixing and stirring uniformly to obtain a premix;

[0055] Step S2: feeding the premix into the main feed port of a twin-screw extruder, feeding the glass fiber into the side feed port, and then extruding, cooling, pelletizing, and homogenizing after melting to obtain a wear-resistant nylon rod, wherein the speed of the twin-screw extruder is 500 rpm, the feeding section temperature is 240°C, the melting section temperature is 275°C, and the head section temperature is 260°C.

[0056] Example 6: A method for preparing a wear-resistant nylon rod comprises the following steps:

[0057] Nylon 6 45%, glass fiber 22.7%, nano-silica 6%, wear-resistant modifier prepared in Example 3 15%, maleic anhydride grafted POE 6%, silane coupling agent KH550 1.5%, silicone masterbatch 1.5%, antioxidant 1076 0.3%, copper salt heat stabilizer 2%;

[0058] Step S1, weighing raw materials according to mass percentage, mixing nylon 6, the wear-resistant modifier prepared in Example 3 and maleic anhydride grafted POE in a blender, then adding nano-silica, silane coupling agent KH550, silicone masterbatch, antioxidant 1076 and copper salt heat stabilizer and mixing and stirring uniformly to obtain a premix;

[0059] Step S2: feeding the premix into the main feed port of a twin-screw extruder, feeding the glass fiber into the side feed port, and then extruding, cooling, pelletizing, and homogenizing after melting to obtain a wear-resistant nylon rod, wherein the speed of the twin-screw extruder is 600 rpm, the feeding section temperature is 250°C, the melting section temperature is 285°C, and the head section temperature is 265°C.

[0060] Comparative Example 1: This comparative example is a nylon rod. The difference from Example 6 is that the wear-resistant agent prepared in the following steps is used instead of the wear-resistant modifier prepared in Example 3. The rest are the same.

[0061] The above-mentioned anti-wear agent comprises the following steps of preparation:

[0062] Step A1: 1 g of base oil PAO and 1 g of polyethersulfone (PES) were mixed and stirred in 20 mL of dichloromethane to obtain a mixture 1; 6 g of gelatin and 100 g of water were stirred at 500 rpm in a 70°C water bath for 50 minutes, then cooled to 30°C and stirred at 800 rpm. Mixture 1 was added dropwise over 30 minutes, and then heated to 40°C and stirred at 400 rpm for 5 hours. The mixture was centrifuged, washed, and dried to obtain PES@base oil.

[0063] Step A2, 0.02 mol of maleic anhydride was mixed evenly in 100 mL of benzene, 0.022 mol of styrene and 10 g of PES@ base oil were added, and the mixture was heated to 55 ° C. under nitrogen, and 5 mL of benzoyl peroxide solution was slowly added dropwise. The mixture was then heated to 85 ° C. and stirred for 4.5 hours. The mixture was filtered, washed, and dried to obtain an anti-wear agent, wherein the ratio of benzoyl peroxide to benzene in the benzoyl peroxide solution was 0.003 g: 5 mL.

[0064] Comparative Example 2: This comparative example is a nylon rod. The difference from Example 6 is that the PES@base oil prepared in Example 3 is used instead of the wear-resistant modifier prepared in Example 3. The rest are the same.

[0065] The nylon rods prepared in Examples 4-6 and Comparative Examples 1-2 were subjected to performance tests:

[0066] Wear resistance test: The friction coefficient of the sample is tested according to ISO 8295 standard; the wear amount is tested according to ISO 9352-2012 standard;

[0067] Thermal stability test: The decomposition temperature T of the wear-resistant modifiers in Examples 4-6 and Comparative Examples 1-2 was tested using a thermogravimetric analyzer. 5% (initial decomposition temperature), the test temperature is 30~700℃, the heating rate is 10℃ / min, and the test environment is argon;

[0068] The test results are shown in Table 1:

[0069] Table 1: Performance test results

[0070]

[0071] As can be seen from Table 1, after the wear resistance test, the friction coefficient of the nylon rod prepared by the present invention is in the range of (0.08-0.09), and the wear loss is in the range of (5.6-5.9)%, indicating that the nylon rod has excellent wear resistance. After the thermal decomposition temperature is measured, the initial decomposition temperature is in the range of (395.4-396.9) ° C. Combined with the wear resistance test results, it can be seen that the wear-resistant modifier prepared by the present invention has better thermal stability, thereby making the nylon rod prepared by melt blending the component materials at high temperature have better wear resistance.

[0072] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the scope defined by the concept of the invention, they should all fall within the scope of protection of the present invention.

Claims

1. A wear-resistant nylon rod, characterized in that: The invention comprises the following raw materials in percentage by mass: nylon 6 45-65%, glass fiber 12-25%, nano silicon dioxide 5-8%, wear-resistant modifier 8-15%, toughening agent 4-8%, silane coupling agent 0.5-2%, lubricant 0.5-1.5%, antioxidant 0.1-0.3%, and heat stabilizer 0.5-2%; The wear-resistant modifier is prepared by polymerizing maleic anhydride and styrene to coat PES@base oil, the PES@base oil is prepared by using a solvent volatilization method to coat a modified base oil with polyethersulfone, the modified base oil is prepared by mixing a modifying additive and a base oil PAO, the modifying additive is prepared by reacting a benzimidazole derivative with boric acid, and the benzimidazole derivative is prepared by grinding and reacting 5,6-dimethylbenzimidazole and 10-chloro-1-decanol; The wear-resistant modifier is specifically prepared by the following steps: Step A1: Add 5,6-dimethylbenzimidazole, 10-chloro-1-decanol, tetrabutylammonium bromide, sodium hydroxide, and water to a grinding jar, then add 12 5-9 mm stainless steel balls, grind in a planetary ball mill at 350-450 rpm for 1-2 hours, wash, filter, and dry to obtain a benzimidazole derivative; Step A2: adding a benzimidazole derivative and boric acid to toluene, mixing and stirring uniformly, heating to 100-110° C. and reflux reaction for 6-8 hours, distilling under reduced pressure, and drying to obtain a modified additive; Step A3, adding the modifying additive to the base oil PAO and mixing and stirring uniformly to obtain the modified base oil; mixing the modified base oil and polyethersulfone in dichloromethane and stirring uniformly to obtain a mixed solution 1; stirring the gelatin and water in a 70°C water bath at a speed of 300-500 rpm for 30-50 minutes, then cooling to 30°C, stirring at a speed of 700-800 rpm, and adding the mixed solution 1 dropwise over 20-30 minutes, then heating to 40°C and stirring at a speed of 400 rpm for 3-5 hours, centrifuging, washing, and drying to obtain the PES@base oil; Step A4: Mix maleic anhydride in benzene, add styrene and PES@base oil, heat to 45-55°C under nitrogen, slowly add benzoyl peroxide solution dropwise, then heat to 75-85°C and stir to react for 3.5-4.5 hours, filter, wash, and dry to obtain a wear-resistant modifier.

2. A wear-resistant nylon rod according to claim 1, characterized in that: In step A1, the usage ratio of 5,6-dimethylbenzimidazole, 10-chloro-1-decanol, tetrabutylammonium bromide, sodium hydroxide and water is 0.1-0.2 mol: 0.12-0.24 mol: 0.0015-0.003 mol: 0.75-1.5 g: 2-4 mL.

3. The wear-resistant nylon rod according to claim 1, characterized in that: In step A2, the ratio of the benzimidazole derivative, boric acid and toluene is 0.03-0.09 mol:0.01-0.03 mol:200 mL.

4. The wear-resistant nylon rod according to claim 1, characterized in that: In step A3, the amount ratio of gelatin, water and mixed solution 1 is 2-6 g:100 g:20 mL, the amount ratio of modified base oil, PES and dichloromethane in the mixed solution 1 is 0.6-1 g:1 g:20 mL, the amount of the modifying additive added to the modified base oil is 0.5 wt%-1.5 wt%, and the rest is base oil PAO.

5. The wear-resistant nylon rod according to claim 1, characterized in that: In step A4, the usage ratio of maleic anhydride, benzene, styrene, PES@base oil and benzoyl peroxide solution is 0.01-0.02 mol:100 mL:0.01-0.022 mol:5-10 g:5 mL.

6. The wear-resistant nylon rod according to claim 1, characterized in that: The amount ratio of benzoyl peroxide and benzene in the benzoyl peroxide-benzene solution of step A4 is 0.001-0.003 g:5 mL.

7. The wear-resistant nylon rod according to claim 1, characterized in that: The toughening agent is maleic anhydride grafted POE, the silane coupling agent is one of KH550 and KH560, the lubricant is silicone masterbatch, the antioxidant is one of antioxidant 1010, antioxidant 1098 and antioxidant 1076, and the heat stabilizer is a copper salt heat stabilizer.

8. A method for preparing the wear-resistant nylon rod according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1, weighing raw materials according to mass percentage, mixing nylon 6, wear-resistant modifier and toughening agent in a blender, then adding nano-silica, silane coupling agent, lubricant, antioxidant and heat stabilizer and mixing and stirring to obtain a premix; Step S2: feeding the premix into the main feed port of the twin-screw extruder, and then feeding the glass fiber into the side feed port, and then extruding, cooling, pelletizing, and homogenizing after melting to obtain the wear-resistant nylon rod.

9. The method for preparing a wear-resistant nylon rod according to claim 8, characterized in that: In step S2, the speed of the twin-screw extruder is 400-600 rpm, the temperature of the feeding section is 230°C-250°C, the temperature of the melting section is 265°C-285°C, and the temperature of the head section is 255°C-265°C.

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