Wear-resistant and aging-resistant daily plastic material and preparation method thereof

Abstract

The invention relates to the technical field of plastics, and discloses a wear-resistant and aging-resistant daily plastic material and a preparation method thereof.The daily plastic material is prepared by taking polypropylene as a base material and a compatilizer, a supported functional agent and the like as additives through mixing and extrusion granulation processes, nanometer hydroxyl magnesium silicate is immobilized on the surface of diamond fiber to prepare the composite material, the dispersity of the supported functional agent can be improved due to the existence of the intermediate connecting agent, the advantages of the supported functional agent serving as an inorganic additive can be efficiently exerted, the mechanical property of the material is enhanced, meanwhile, a hindered phenol structure in the intermediate connecting agent structure can improve the oxidation resistance of the material, and in addition, the composite material has a good application prospect. And when the material is rubbed, the nano-hydroxyl magnesium silicate can generate slight relative slippage on the surface of the diamond fiber, namely a ball effect, and the wear resistance of the material can be greatly improved by matching with the wear-resistant modification effect of the nano-hydroxyl magnesium silicate.

Description

Technical Field

[0001] This invention relates to the field of plastics technology, specifically to a wear-resistant and aging-resistant Nippon Plastics material and its preparation method. Background Technology

[0002] Everyday plastic products, as fundamental items of modern life, are widely used in the home furnishing industry, such as plastic basins and buckets. With rising consumption levels and increasing environmental protection requirements, the market demand for functional plastic materials is becoming increasingly prominent. While traditional plastic materials (such as polyethylene and polystyrene) possess advantages such as low cost and ease of processing, they have shortcomings in weather resistance and high-temperature stability. Polypropylene, with its unique low-density characteristics, high chemical stability, and excellent processing performance, is gradually becoming a key material in the plastics industry. In this sector, polypropylene is widely used in injection-molded products, such as plastic chairs.

[0003] However, polypropylene itself has poor wear resistance. After long-term friction, a large number of scratches will appear on the product surface, which not only affects the appearance of the product, but may even affect the use of the material. In addition, polypropylene also has poor thermo-oxidative aging performance, which results in a short service life of polypropylene Nippon Plastics products. These defects have greatly limited the further application of polypropylene in the field of Nippon Plastics products. Therefore, it is of great significance to improve the comprehensive performance of polypropylene materials.

[0004] Currently, research on improving the various properties of polypropylene materials by adding inorganic substances is quite extensive. However, as research continues, the poor compatibility between inorganic substances and polypropylene has gradually become apparent, making it difficult for inorganic substances to fully exert their advantages. Therefore, a large amount of inorganic substances is generally required to produce a certain modification effect. However, a large amount of inorganic substances will negatively affect the toughness and strength of polypropylene. Therefore, this invention provides a polypropylene material with good wear resistance and aging resistance, which can solve the problems existing in the prior art. Summary of the Invention

[0005] In order to solve the problems mentioned in the background art, the purpose of this invention is to provide a wear-resistant and aging-resistant Nippon Plastic material and its preparation method.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A wear-resistant and aging-resistant Nippon Plastic material, comprising the following raw materials by weight:

[0008]

[0009] The supported functional agent is diamond fiber with nano-hydroxy magnesium silicate loaded on its surface.

[0010] As a further embodiment of the present invention, the compatibilizer is maleic anhydride-grafted polyethylene or maleic anhydride-grafted polypropylene; the toughening agent is ethylene-octene block copolymer; and the lubricant is any one of polyethylene wax, zinc stearate, or calcium stearate.

[0011] As a further aspect of the present invention, the supported functional agent is prepared by the following method:

[0012] Step 1: Disperse diamond fibers in an aqueous ethanol solution to prepare a diamond fiber dispersion; ultrasonically disperse nano-hydroxy magnesium silicate in an aqueous ethanol solution to prepare a nano-hydroxy magnesium silicate dispersion.

[0013] Step 2: Add intermediate linker to diamond fiber dispersion. After addition, stir and mix well, adjust pH to 3-4, then raise temperature to 70-80℃, keep warm and stir for 4-6 hours, then continue to add nano-hydroxy magnesium silicate dispersion. After addition, keep warm under ultrasonic conditions for 6-9 hours, centrifuge to separate solid material, wash and vacuum dry to obtain supported functional agent.

[0014] As a further aspect of the present invention, in step one, the mass fraction of the diamond fiber dispersion is 20-30%; and the mass fraction of the nano-hydroxy magnesium silicate dispersion is 10-15%.

[0015] As a further aspect of the present invention, in step two, the intermediate linker is prepared by the following method:

[0016] Step A: Add gallic acid to acetone, stir and mix evenly, and purge with nitrogen for protection. Then add the composite catalyst to the formed homogeneous solution, stir at room temperature for 20-40 min, and then add 1,3-dibromo-2-propanol. After the addition is complete, raise the temperature to 30-40℃, keep it warm and stir for 3-6 h, evaporate to remove the solvent, collect the product, and purify it to obtain the intermediate material.

[0017] Step B: Add the intermediate material and dimethyl sulfoxide to the polymerization reactor, start stirring, and mix evenly. Then add 2-methoxycarbonylethylaminoethylaminopropyltrimethoxysilane. After the addition is complete, stir evenly. Then raise the temperature to 60-70℃ and keep it at that temperature for 4-6 hours. Then continue to add the acid-binding agent to the polymerization reactor and raise the temperature to 80-90℃. Keep it at that temperature for 9-18 hours. Then stop heating, cool down and discharge the material. Separate the product and purify it to obtain the intermediate linker.

[0018] As a further aspect of the present invention, in step A, the molar ratio of gallic acid and 1,3-dibromo-2-propanol is 1:1.

[0019] As a further embodiment of the present invention, in step A, the composite catalyst is a mixture of dicyclohexylcarbodiimide and 4-dimethylaminopyridine in a mass ratio of 1:0.3-0.4.

[0020] As a further aspect of the present invention, in step B, the acid-binding agent is triethylamine.

[0021] As a further aspect of the present invention, in step two, the volume ratio of the diamond fiber dispersion and the nano-hydroxy magnesium silicate dispersion is 1:0.4-0.6.

[0022] It should be noted that in the above technical solution, gallic acid and 1,3-dibromo-2-propanol are first used as reactants. The active carboxyl groups and active hydroxyl groups in their structures undergo esterification condensation reaction under the action of a composite catalyst to obtain a gallic acid derivative containing two equivalent halogen substituents, i.e., an intermediate. Then, under the action of an acid-binding agent, the two equivalent active halogen substituents in its structure undergo a continuous substitution reaction with the two equivalent secondary amino groups in the structure of 2-methoxycarbonylethylaminoethylaminopropyltrimethoxysilane, thereby obtaining a macromolecular substance with an alternating linkage structure, i.e., an intermediate linker.

[0023] Under acidic conditions, a large number of siloxane groups in the intermediate linker structure hydrolyze into silanol groups, which then condense with hydroxyl groups on the surface of diamond fibers and nano-hydroxy magnesium silicate, thereby immobilizing nano-hydroxy magnesium silicate on the surface of diamond fibers, thus obtaining diamond fibers with nano-hydroxy magnesium silicate loaded on the surface, i.e., supported functional agents.

[0024] A method for preparing a wear-resistant and aging-resistant Nippon Plastic material includes the following steps:

[0025] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0026] The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 80-100℃, and mechanically mixing at a speed of 500-1000r / min for 30-60 minutes. After mixing, the mixture is transferred to a twin-screw extruder for melt extrusion granulation. The masterbatch is then dried to obtain Nippon Plastics material.

[0027] The beneficial effects of this invention are:

[0028] This invention utilizes an intermediate binder to immobilize nano-hydroxy magnesium silicate on diamond fibers. On one hand, the intermediate binder forms a transition structure between the supported functional agent and the polypropylene matrix, effectively improving interfacial compatibility. This allows the supported functional agent to efficiently exert its reinforcing and modifying effects as an inorganic material, enhancing the material's mechanical strength. Furthermore, the intermediate binder structure contains a large number of natural hindered phenolic antioxidant structures, effectively improving the material's antioxidant properties. On the other hand, immobilizing nano-hydroxy magnesium silicate on the diamond fiber surface allows for slight relative slippage, or "ball bearing" effect, on the diamond fiber surface during friction. Combined with the wear-resistant modification effect of nano-hydroxy magnesium silicate itself, this significantly improves the material's wear resistance.

[0029] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] A wear-resistant and aging-resistant Nippon Plastic material, comprising the following raw materials by weight:

[0033]

[0034]

[0035] The preparation method of the Japanese-made material includes the following steps:

[0036] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0037] The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 80°C, and mechanically mixing at 500 r / min for 60 minutes. The mixture is then transferred to a twin-screw extruder for melt extrusion granulation. After drying the masterbatch, Nippon Plastics material is obtained.

[0038] The supported functional agent is prepared using the following method:

[0039] Step 1: Disperse diamond fibers in a 60% (v / v) aqueous ethanol solution to prepare a 20% (w / w) diamond fiber dispersion; ultrasonically disperse nano-hydroxy magnesium silicate in a 60% (v / v) aqueous ethanol solution to prepare a 10% (w / w) nano-hydroxy magnesium silicate dispersion.

[0040] Step 2: Add 0.3g of intermediate linker to 5mL of diamond fiber dispersion. After the addition is complete, stir and mix well. Adjust the pH to 4. Then raise the temperature to 75℃ and keep it warm and stirred for 4 hours. Then add 2.5mL of nano-hydroxy magnesium silicate dispersion. After the addition is complete, keep it warm under ultrasonic conditions for 8 hours. Centrifuge to separate the solid material. After washing and vacuum drying, the supported functional agent is obtained.

[0041] The intermediate binder is prepared using the following method:

[0042] Step A: Add 1.2g gallic acid to acetone, stir and mix evenly, and purge with nitrogen for protection. Then add 0.5g dicyclohexylcarbodiimide and 0.2g 4-dimethylaminopyridine to the formed homogeneous solution. Stir at room temperature for 30min, then add 1.54g 1,3-dibromo-2-propanol. After the addition is complete, raise the temperature to 35℃ and keep stirring for 4h. Evaporate to remove the solvent, collect the product, and purify it to obtain the intermediate material.

[0043] Step B: Add 0.8g of intermediate material and dimethyl sulfoxide to the polymerization reactor, start stirring, and mix evenly. Then add 0.67g of 2-methoxycarbonylethylaminoethylaminopropyltrimethoxysilane. After the addition is complete, stir evenly. Then raise the temperature to 65℃ and keep it at that temperature for 6 hours. Then add 0.2g of triethylamine to the polymerization reactor and raise the temperature to 85℃. Keep it at that temperature for 16 hours. Then stop heating, cool down and discharge the material. Separate the product and purify it to obtain the intermediate linker.

[0044] Example 2

[0045] A wear-resistant and aging-resistant Nippon Plastic material, comprising the following raw materials by weight:

[0046]

[0047] The preparation method of the Japanese-made material includes the following steps:

[0048] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0049] The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 90°C, and mechanically mixing at 800 r / min for 40 minutes. The mixture is then transferred to a twin-screw extruder for melt extrusion granulation. After drying the masterbatch, Nippon Plastics material is obtained.

[0050] The preparation method of the supported functional agent is the same as that in Example 1.

[0051] Example 3

[0052] A wear-resistant and aging-resistant Nippon Plastic material, comprising the following raw materials by weight:

[0053]

[0054] The preparation method of the Japanese-made material includes the following steps:

[0055] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0056] The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 100℃, and mechanically mixing at a speed of 1000r / min for 30 minutes. Then, the mixture is transferred to a twin-screw extruder for melt extrusion granulation. After drying the masterbatch, Nippon Plastics material is obtained.

[0057] The preparation method of the supported functional agent is the same as that in Example 1.

[0058] Comparative Example 1

[0059] A wear-resistant and aging-resistant Nippon Plastic material, comprising the following raw materials by weight:

[0060]

[0061] The preparation method of the Japanese-made material includes the following steps:

[0062] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0063] The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 90°C, and mechanically mixing at 800 r / min for 40 minutes. The mixture is then transferred to a twin-screw extruder for melt extrusion granulation. After drying the masterbatch, Nippon Plastics material is obtained.

[0064] Comparative Example 2

[0065] A wear-resistant and aging-resistant Nippon Plastic material, comprising the following raw materials by weight:

[0066]

[0067] The preparation method of the Japanese-made material includes the following steps:

[0068] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0069] The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 90°C, and mechanically mixing at 800 r / min for 40 minutes. The mixture is then transferred to a twin-screw extruder for melt extrusion granulation. After drying the masterbatch, Nippon Plastics material is obtained.

[0070] Comparative Example 3

[0071] A wear-resistant and aging-resistant Nippon Plastic material, comprising the following raw materials by weight:

[0072]

[0073] The preparation method of the Japanese-made material includes the following steps:

[0074] Step 1: Weigh and prepare all the raw materials according to their weight proportions;

[0075] The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 90°C, and mechanically mixing at 800 r / min for 40 minutes. The mixture is then transferred to a twin-screw extruder for melt extrusion granulation. After drying the masterbatch, Nippon Plastics material is obtained.

[0076] Test case

[0077] The Nippon Plastics materials used in the examples and comparative examples were injection molded into various test samples that met the specifications, and various performance tests were conducted.

[0078] According to the standard GB / T 1040.1-2006, tensile properties were tested and recorded as the initial value. After the test, the samples of the same batch were placed in a temperature environment of 120℃ for accelerated aging for 12 hours and then taken out to test the tensile properties and record them as the value after aging. The antioxidant performance was evaluated by calculating the difference between the two values.

[0079] Referring to the standard ASTM D3884, a 10cm×10cm×8mm sample strip was placed on a grinding rotary test bench. The rotation speed was set to 60r / min, and the sample was rubbed with a load of 1000g. The grinding wheel was SC10. The wear amount of the sample was tested after 5000 revolutions to evaluate its wear resistance.

[0080] The results are recorded in Table 1:

[0081] Table 1 - Test Results

[0082]

[0083]

[0084] Analysis of the test results shows that the Nippon Plastic material prepared in the embodiments of the present invention has excellent mechanical strength, wear resistance and oxidation resistance.

[0085] Replacing the loaded functional agent with diamond fiber results in two problems: firstly, the intermediate binder is lost, leading to interface issues and preventing the diamond fiber from effectively exerting its traction effect; secondly, the ball bearing effect cannot be formed, resulting in a significant decline in the material's various properties.

[0086] Even after replacing the supported functional agent with nano-hydroxy magnesium silicate, the same problem persisted, resulting in a significant decrease in various properties.

[0087] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of these embodiments are merely to aid in understanding the method and core ideas of the present invention, including the best mode, and to enable any person skilled in the art to practice the present invention, including manufacturing and using any device or system, and implementing any combined method. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims. The scope of protection of this patent is defined by the claims and may include other embodiments that can be conceived by those skilled in the art. If these other embodiments have structural elements similar to those expressed in the claims, or if they include equivalent structural elements that are not substantially different from those expressed in the claims, then these other embodiments should also be included within the scope of the claims.

[0088] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wear-resistant and aging-resistant Nippon Plastic material, characterized in that, By weight, it includes the following ingredients: The supported functional agent is diamond fiber with nano-hydroxy magnesium silicate loaded on its surface.

2. The wear-resistant and aging-resistant Nippon Plastic material according to claim 1, characterized in that, The compatibilizer is maleic anhydride-grafted polyethylene or maleic anhydride-grafted polypropylene; the toughening agent is ethylene-octene block copolymer; and the lubricant is any one of polyethylene wax, zinc stearate, or calcium stearate.

3. The wear-resistant and aging-resistant Nippon Plastic material according to claim 1, characterized in that, The supported functional agent is prepared using the following method: Step 1: Disperse diamond fibers in an aqueous ethanol solution to prepare a diamond fiber dispersion; ultrasonically disperse nano-hydroxy magnesium silicate in an aqueous ethanol solution to prepare a nano-hydroxy magnesium silicate dispersion. Step 2: Add intermediate linker to diamond fiber dispersion. After addition, stir and mix well, adjust pH to 3-4, then raise temperature to 70-80℃, keep warm and stir for 4-6 hours, then continue to add nano-hydroxy magnesium silicate dispersion. After addition, keep warm under ultrasonic conditions for 6-9 hours, centrifuge to separate solid material, wash and vacuum dry to obtain supported functional agent.

4. The wear-resistant and aging-resistant Nippon Plastic material according to claim 3, characterized in that, In step one, the mass fraction of the diamond fiber dispersion is 20-30%; the mass fraction of the nano-hydroxy magnesium silicate dispersion is 10-15%.

5. The wear-resistant and aging-resistant Nippon Plastic material according to claim 3, characterized in that, In step two, the intermediate linker is prepared using the following method: Step A: Add gallic acid to acetone, stir and mix evenly, and purge with nitrogen for protection. Then add the composite catalyst to the formed homogeneous solution, stir at room temperature for 20-40 min, and then add 1,3-dibromo-2-propanol. After the addition is complete, raise the temperature to 30-40℃, keep it warm and stir for 3-6 h, evaporate to remove the solvent, collect the product, and purify it to obtain the intermediate material. Step B: Add the intermediate material and dimethyl sulfoxide to the polymerization reactor, start stirring, and mix evenly. Then add 2-methoxycarbonylethylaminoethylaminopropyltrimethoxysilane. After the addition is complete, stir evenly. Then raise the temperature to 60-70℃ and keep it at that temperature for 4-6 hours. Then continue to add the acid-binding agent to the polymerization reactor and raise the temperature to 80-90℃. Keep it at that temperature for 9-18 hours. Then stop heating, cool down and discharge the material. Separate the product and purify it to obtain the intermediate linker.

6. The wear-resistant and aging-resistant Nippon Plastic material according to claim 5, characterized in that, In step A, the molar ratio of gallic acid to 1,3-dibromo-2-propanol is 1:

1.

7. The wear-resistant and aging-resistant Nippon Plastic material according to claim 5, characterized in that, In step A, the composite catalyst is a mixture of dicyclohexylcarbodiimide and 4-dimethylaminopyridine in a mass ratio of 1:0.3-0.

4.

8. The wear-resistant and aging-resistant Nippon Plastic material according to claim 5, characterized in that, In step B, the acid-binding agent is triethylamine.

9. The wear-resistant and aging-resistant Nippon Plastic material according to claim 3, characterized in that, In step two, the volume ratio of the diamond fiber dispersion and the nano-hydroxy magnesium silicate dispersion is 1:0.4-0.

6.

10. A method for preparing the wear-resistant and aging-resistant Nippon Plastic material as described in claim 1, characterized in that, Includes the following steps: Step 1: Weigh and prepare all the raw materials according to their weight proportions; The second step involves adding all raw materials to a high-speed mixer, controlling the mixing temperature at 80-100℃, and mechanically mixing at a speed of 500-1000r / min for 30-60 minutes. After mixing, the mixture is transferred to a twin-screw extruder for melt extrusion granulation. The masterbatch is then dried to obtain Nippon Plastics material.

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