Compression-resistant wear-resistant HDPE (high-density polyethylene) cable protection pipe and preparation method thereof

Abstract

The invention relates to a compression-resistant wear-resistant HDPE (high-density polyethylene) cable protection pipe and a preparation method thereof, and belongs to the technical field of HDPE cable protection pipes. The compression-resistant and wear-resistant HDPE cable protection pipe comprises the following components: high-density polyethylene and a wear-resistant composite filler, the preparation method of the wear-resistant composite filler comprises the following steps: in an inert atmosphere, dropwise adding a mixed solution composed of aluminum nitrate, zinc nitrate and deionized water and a sodium hydroxide aqueous solution into an antioxidant, standing, filtering to obtain a solid, washing, and drying to obtain a mixture; adding a silane coupling agent into the diamond treated by the sodium hydroxide aqueous solution for modification to obtain pretreated diamond; and carrying out melt extrusion on the pre-treated diamond, the mixture and the compatilizer, and pelletizing to obtain the composite material. The filler is organically modified, so that the compatibility and dispersity of the filler are improved, and the HDPE cable protection pipe has excellent compression resistance and wear resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of HDPE cable protection tubes and relates to a compression-resistant and wear-resistant HDPE cable protection tube and a preparation method thereof. Background Art

[0002] HDPE cable protection tube is a kind of pipe widely used in underground cable laying and protection. Its main component is high-density polyethylene (HDPE), which has excellent chemical stability, corrosion resistance and impact resistance. HDPE cable protection tube can not only effectively protect the cable from the external environment, but also extend the service life of the cable, ensuring the safety and reliability of power transmission.

[0003] In cable protection products, antioxidants and other organic additives are used to improve their stability and durability during long-term use. However, these organic substances tend to evaporate and migrate into the surrounding environment during long-term use. This volatilization and migration will cause these additives to gradually lose their original anti-aging function, making the cable protection products gradually hard and brittle. Ultimately, the service life of the cable protection products may be greatly shortened, and even affect their normal use.

[0004] Diamond is an extremely hard and wear-resistant material, often used as a filler to improve the wear resistance of other materials. However, the compatibility of diamond with high-density polyethylene (HDPE) is not ideal. HDPE is a widely used plastic with good chemical stability and corrosion resistance, but when combined with diamond, it often leads to compatibility issues due to the large differences in physical and chemical properties between the two. In order to improve this compatibility, it is usually necessary to improve the bonding strength between diamond and HDPE through surface modification or other chemical treatment methods, so that it can better play the role of wear-resistant filler in practical applications. Summary of the invention

[0005] The object of the present invention is to provide a compression-resistant and wear-resistant HDPE cable protection tube and a preparation method thereof. The present invention forms a coating on an antioxidant by aluminum / zinc hydrotalcite, and diamond modified by a silane coupling agent to increase the compatibility with a compatibilizer, change the dispersibility of diamond and aluminum / zinc hydrotalcite in a HDPE system, promote the compatibility of the HDPE system, significantly improve the mechanical properties of the HDPE composite material, and make it have better wear resistance.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A compression-resistant and wear-resistant HDPE cable protection tube, the HDPE cable protection tube comprises the following components in parts by weight:

[0008] 90-110 parts of high-density polyethylene and 15-20 parts of wear-resistant composite filler;

[0009] The preparation method of the wear-resistant composite filler comprises the following steps:

[0010] S1, stirring and mixing aluminum nitrate, zinc nitrate and deionized water to obtain a mixed solution;

[0011] S2. In an inert atmosphere, slowly drop the mixed solution and the sodium hydroxide aqueous solution into the antioxidant, let it stand, filter out the solid, wash and dry it to obtain a mixture;

[0012] S3, adding diamond to sodium hydroxide aqueous solution for ultrasonic treatment and then heating, washing the solid, drying, adding to anhydrous ethanol, stirring and mixing, adding a silane coupling agent, mechanically stirring, filtering and taking the solid, washing and drying, to obtain pretreated diamond;

[0013] S4, melt-extrude the pretreated diamond, the mixture and the compatibilizer, and then pelletize to obtain a wear-resistant composite filler.

[0014] As a preferred technical solution of the present invention, in steps S1-S2, the mass ratio of the aluminum nitrate, zinc nitrate, deionized water, sodium hydroxide aqueous solution and antioxidant is 9-10.0:13-16:100:180-200:8.4-9.0.

[0015] As a preferred technical solution of the present invention, in step S2, the sodium hydroxide aqueous solution is prepared by mixing sodium hydroxide and deionized water in a dosage ratio of 1 g:20 mL.

[0016] As a preferred technical solution of the present invention, in step S2, the antioxidant is prepared by mixing antioxidant 1076 and antioxidant 1010 at a mass ratio of 1:2.5-3.0.

[0017] As a preferred technical solution of the present invention, in step S2, the inert atmosphere is a nitrogen inert atmosphere.

[0018] As a preferred technical solution of the present invention, in step S2, the standing time is 12-15 hours.

[0019] As a preferred technical solution of the present invention, in step S2, the washing is performed by washing with deionized water until it becomes neutral.

[0020] As a preferred technical solution of the present invention, in step S2, the drying is performed at a temperature of 80-90°C to a constant weight.

[0021] As a preferred technical solution of the present invention, in step S3, the volume concentration of the sodium hydroxide aqueous solution is 20%.

[0022] As a preferred technical solution of the present invention, in step S3, the ultrasonic treatment time is 3-8 minutes.

[0023] As a preferred technical solution of the present invention, in step S3, the heating treatment is a heating treatment at a temperature of 80-85°C for 3-4h.

[0024] As a preferred technical solution of the present invention, in step S3, the washing is performed by washing with deionized water until it becomes neutral.

[0025] As a preferred technical solution of the present invention, in step S3, the drying is performed at a temperature of 90° C. to a constant weight.

[0026] As a preferred technical solution of the present invention, in step S3, the mechanical stirring is stirring at a temperature of 50-60°C and a speed of 400-500 r / min for 4-6 hours.

[0027] As a preferred technical solution of the present invention, in step S3, the washing is performed by washing with anhydrous ethanol for 3 times.

[0028] As a preferred technical solution of the present invention, in step S3, the drying is performed at 90° C. to a constant weight.

[0029] As a preferred technical solution of the present invention, in step S3, the mass ratio of the diamond, the sodium hydroxide aqueous solution, the anhydrous ethanol and the silane coupling agent is 6-9:30-40:45-50:3.4-4.0.

[0030] As a preferred technical solution of the present invention, in step S3, the silane coupling agent is silane coupling agent NQ62.

[0031] As a preferred technical solution of the present invention, in step S4, the temperature of the melt extrusion is 190-210°C.

[0032] As a preferred technical solution of the present invention, in step S4, the mass ratio of the pretreated diamond, the mixture and the compatibilizer is 3.0-3.6:1.2-1.6:6.2-7.0.

[0033] As a preferred technical solution of the present invention, in step S4, the compatibilizer is styrene-butadiene-glyceryl methacrylate copolymer.

[0034] A method for preparing a compression-resistant and wear-resistant HDPE cable protection tube comprises the following steps: melt-extruding high-density polyethylene and wear-resistant composite filler at a temperature of 190-210° C., granulating, and molding to obtain the tube.

[0035] Beneficial effects of the present invention:

[0036] The present invention forms a coating on the antioxidant by aluminum / zinc hydrotalcite and increases the compatibility with the compatibilizer by using the diamond modified by the silane coupling agent, changes the dispersibility of the diamond and the aluminum / zinc hydrotalcite in the HDPE system, promotes the compatibility of the HDPE system, significantly improves the mechanical properties of the HDPE composite material, and makes it have better wear resistance. DETAILED DESCRIPTION

[0037] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0038] Example 1

[0039] A compression-resistant and wear-resistant HDPE cable protection tube comprises the following components by weight:

[0040] 90 parts of high-density polyethylene and 15 parts of wear-resistant composite filler;

[0041] The preparation method of the wear-resistant composite filler comprises the following steps:

[0042] S1, stirring and mixing aluminum nitrate, zinc nitrate and deionized water to obtain a mixed solution;

[0043] S2. In an inert atmosphere of nitrogen, slowly drop the mixed solution and the sodium hydroxide aqueous solution into the antioxidant, let it stand for 12 hours, filter out the solid, wash it with deionized water until it is neutral, and dry it at 80° C. to constant weight to obtain a mixture;

[0044] S3, adding diamond to a 20% volume concentration sodium hydroxide aqueous solution and ultrasonically treating it for 3 minutes, then heating it at 80°C for 3 hours, taking the solid, washing it with deionized water until it is neutral, drying it at 90°C to constant weight, adding it to anhydrous ethanol and stirring it, adding a silane coupling agent, stirring it at 50°C and 400r / min for 4 hours, filtering the solid, washing it with anhydrous ethanol for 3 times, and drying it at 90°C to constant weight to obtain pretreated diamond;

[0045] S4, melt-extrude the pretreated diamond, the mixture and the compatibilizer at a temperature of 190° C., and pelletize to obtain a wear-resistant composite filler.

[0046] In step S1-S2, the mass ratio of the aluminum nitrate, zinc nitrate, deionized water, sodium hydroxide aqueous solution and antioxidant is 9:13:100:180:8.4; the sodium hydroxide aqueous solution is prepared by mixing sodium hydroxide and deionized water at a ratio of 1 g:20 mL; the antioxidant is prepared by mixing antioxidant 1076 and antioxidant 1010 at a mass ratio of 1:2.5;

[0047] In step S3, the mass ratio of the diamond, the sodium hydroxide aqueous solution, the anhydrous ethanol and the silane coupling agent is 6:30:45:3.4; the silane coupling agent is the silane coupling agent NQ62;

[0048] In step S4, the mass ratio of the pretreated diamond, the mixture and the compatibilizer is 3.0:1.2:6.2; the compatibilizer is styrene-butadiene-glyceryl methacrylate copolymer.

[0049] A method for preparing a compression-resistant and wear-resistant HDPE cable protection tube comprises the following steps:

[0050] The high-density polyethylene and the wear-resistant composite filler are melt-extruded at a temperature of 190°C, granulated and molded to obtain the product.

[0051] Example 2

[0052] A compression-resistant and wear-resistant HDPE cable protection tube comprises the following components by weight:

[0053] 97 parts of high-density polyethylene and 17 parts of wear-resistant composite filler;

[0054] The preparation method of the wear-resistant composite filler comprises the following steps:

[0055] S1, stirring and mixing aluminum nitrate, zinc nitrate and deionized water to obtain a mixed solution;

[0056] S2. In an inert atmosphere of nitrogen, slowly drop the mixed solution and the sodium hydroxide aqueous solution into the antioxidant, let it stand for 13 hours, filter out the solid, wash it with deionized water until it is neutral, and dry it at 83° C. to constant weight to obtain a mixture;

[0057] S3, adding diamond to a 20% volume concentration sodium hydroxide aqueous solution and ultrasonically treating it for 5 minutes, then heating it at 82°C for 3.5 hours, taking the solid, washing it with deionized water until it is neutral, drying it at 90°C to constant weight, adding it to anhydrous ethanol and stirring it, adding a silane coupling agent, stirring it at 53°C and 430r / min for 4.5 hours, filtering the solid, washing it with anhydrous ethanol for 3 times, and drying it at 90°C to constant weight to obtain pretreated diamond;

[0058] S4, melt-extrude the pretreated diamond, the mixture and the compatibilizer at a temperature of 197° C., and pelletize to obtain a wear-resistant composite filler.

[0059] In step S1-S2, the mass ratio of the aluminum nitrate, zinc nitrate, deionized water, sodium hydroxide aqueous solution and antioxidant is 9.3:14:100:185:8.6; the sodium hydroxide aqueous solution is prepared by mixing sodium hydroxide and deionized water at a ratio of 1 g:20 mL; the antioxidant is prepared by mixing antioxidant 1076 and antioxidant 1010 at a mass ratio of 1:2.7;

[0060] In step S3, the mass ratio of the diamond, the sodium hydroxide aqueous solution, the anhydrous ethanol and the silane coupling agent is 7:33:47:3.6; the silane coupling agent is silane coupling agent NQ62;

[0061] In step S4, the mass ratio of the pretreated diamond, the mixture and the compatibilizer is 3.2:1.3:6.5; the compatibilizer is styrene-butadiene-methacrylate glycerol copolymer.

[0062] A method for preparing a compression-resistant and wear-resistant HDPE cable protection tube comprises the following steps:

[0063] The high-density polyethylene and the wear-resistant composite filler are melt-extruded at a temperature of 195°C, granulated and molded to obtain the product.

[0064] Example 3

[0065] A compression-resistant and wear-resistant HDPE cable protection tube comprises the following components by weight:

[0066] 105 parts of high-density polyethylene and 18 parts of wear-resistant composite filler;

[0067] The preparation method of the wear-resistant composite filler comprises the following steps:

[0068] S1, stirring and mixing aluminum nitrate, zinc nitrate and deionized water to obtain a mixed solution;

[0069] S2. In an inert atmosphere of nitrogen, slowly drop the mixed solution and the sodium hydroxide aqueous solution into the antioxidant, let it stand for 14 hours, filter out the solid, wash it with deionized water until it is neutral, and dry it at 87° C. to constant weight to obtain a mixture;

[0070] S3, adding diamond to a 20% volume concentration sodium hydroxide aqueous solution and ultrasonically treating it for 6 minutes, then heating it at 83°C for 3.5 hours, taking the solid, washing it with deionized water until it is neutral, drying it at 90°C to constant weight, adding it to anhydrous ethanol and stirring it, adding a silane coupling agent, stirring it at 57°C and 460r / min for 5.5 hours, filtering the solid, washing it with anhydrous ethanol for 3 times, and drying it at 90°C to constant weight to obtain pretreated diamond;

[0071] S4, melt-extrude the pretreated diamond, the mixture and the compatibilizer at a temperature of 205° C., and pelletize to obtain a wear-resistant composite filler.

[0072] In step S1-S2, the mass ratio of the aluminum nitrate, zinc nitrate, deionized water, sodium hydroxide aqueous solution and antioxidant is 9.7:15:100:195:8.8; the sodium hydroxide aqueous solution is prepared by mixing sodium hydroxide and deionized water at a ratio of 1 g:20 mL; the antioxidant is prepared by mixing antioxidant 1076 and antioxidant 1010 at a mass ratio of 1:2.8;

[0073] In step S3, the mass ratio of the diamond, the sodium hydroxide aqueous solution, the anhydrous ethanol and the silane coupling agent is 8:37:48:3.8; the silane coupling agent is silane coupling agent NQ62;

[0074] In step S4, the mass ratio of the pretreated diamond, the mixture and the compatibilizer is 3.4:1.5:6.7; the compatibilizer is styrene-butadiene-glyceryl methacrylate copolymer.

[0075] A method for preparing a compression-resistant and wear-resistant HDPE cable protection tube comprises the following steps:

[0076] The high-density polyethylene and the wear-resistant composite filler are melt-extruded at a temperature of 205°C, granulated and molded to obtain the product.

[0077] Example 4

[0078] A compression-resistant and wear-resistant HDPE cable protection tube comprises the following components by weight:

[0079] 110 parts of high-density polyethylene and 20 parts of wear-resistant composite filler;

[0080] The preparation method of the wear-resistant composite filler comprises the following steps:

[0081] S1, stirring and mixing aluminum nitrate, zinc nitrate and deionized water to obtain a mixed solution;

[0082] S2. In an inert atmosphere of nitrogen, slowly drop the mixed solution and the sodium hydroxide aqueous solution into the antioxidant, let it stand for 15 hours, filter out the solid, wash it with deionized water until it is neutral, and dry it at 90° C. to constant weight to obtain a mixture;

[0083] S3, adding diamond to a 20% volume concentration sodium hydroxide aqueous solution and ultrasonically treating it for 8 minutes, then heating it at 85°C for 4 hours, taking the solid, washing it with deionized water until it is neutral, drying it at 90°C to constant weight, adding it to anhydrous ethanol and stirring it, adding a silane coupling agent, stirring it at 60°C and 500r / min for 6 hours, filtering the solid, washing it with anhydrous ethanol for 3 times, and drying it at 90°C to constant weight to obtain pretreated diamond;

[0084] S4, melt-extrude the pretreated diamond, the mixture and the compatibilizer at a temperature of 210° C., and pelletize to obtain a wear-resistant composite filler.

[0085] In step S1-S2, the mass ratio of the aluminum nitrate, zinc nitrate, deionized water, sodium hydroxide aqueous solution and antioxidant is 10.0:16:100:200:9.0; the sodium hydroxide aqueous solution is prepared by mixing sodium hydroxide and deionized water at a ratio of 1 g:20 mL; the antioxidant is prepared by mixing antioxidant 1076 and antioxidant 1010 at a mass ratio of 1:3.0;

[0086] In step S3, the mass ratio of the diamond, the sodium hydroxide aqueous solution, the anhydrous ethanol and the silane coupling agent is 9:40:50:4.0; the silane coupling agent is silane coupling agent NQ62;

[0087] In step S4, the mass ratio of the pretreated diamond, the mixture and the compatibilizer is 3.6:1.6:7.0; the compatibilizer is styrene-butadiene-methacrylate glycerol copolymer.

[0088] A method for preparing a compression-resistant and wear-resistant HDPE cable protection tube comprises the following steps:

[0089] The high-density polyethylene and the wear-resistant composite filler are melt-extruded at a temperature of 210°C, granulated and molded to obtain the product.

[0090] Comparative Example 1

[0091] Compared with embodiment 4, the difference lies in step S2;

[0092] Step S2: Under a nitrogen inert atmosphere, the mixed solution and the sodium hydroxide aqueous solution are mixed, and the mixture is allowed to stand for 15 hours, and then the solid is filtered out, washed with deionized water until neutral, dried at 90° C. to constant weight, and then an antioxidant is added and mixed to obtain a mixture;

[0093] The remaining components, preparation steps and parameters were the same.

[0094] Comparative Example 2

[0095] Compared with Example 4, the difference is that step S3 does not use sodium hydroxide aqueous solution, and the remaining components, preparation steps and parameters are the same.

[0096] Comparative Example 3

[0097] Compared with Example 4, the difference is that no silane coupling agent is used in step S3, and the other components, preparation steps and parameters are the same.

[0098] Comparative Example 4

[0099] Compared with Example 4, the difference is that no compatibilizer is used in step S4, and the other components, preparation steps and parameters are the same.

[0100] The HDPE cable protection tubes prepared in Examples 1-4 and Comparative Examples 1-4 were subjected to the following mechanical property tests, and the test results are shown in Table 1.

[0101] Mechanical properties test: According to GB / T 2951.11-2008.

[0102] Table 1

[0103]

[0104]

[0105] It can be seen from the test results in Table 1 that the HDPE flame-retardant pipes prepared in Examples 1-4 of the present invention have good mechanical properties and are not easy to wear.

[0106] From the comparative analysis of the test results of Examples 1-4, Comparative Examples 1-4 and Table 1, it can be seen that the present invention forms a coating on the antioxidant by aluminum / zinc hydrotalcite, so that the antioxidant is not easy to migrate. At the same time, the presence of the antioxidant also changes the dispersibility of the aluminum / zinc hydrotalcite, making it more evenly dispersed in the HDPE system. The hydrotalcite coats the organic matter, increases the interfacial bonding force between it and the pretreated diamond and the compatibilizer, and increases its compatibility. The diamond modified by the silane coupling agent increases the compatibility with the compatibilizer, changes the dispersibility of the diamond in the HDPE system, promotes its compatibility with the HDPE system, and significantly improves the mechanical properties of the HDPE composite material, so that it has better wear resistance.

[0107] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A compression-resistant and wear-resistant HDPE cable protection tube, characterized in that: The HDPE cable protection tube comprises the following components in parts by weight: 90-110 parts of high-density polyethylene and 15-20 parts of wear-resistant composite filler; The preparation method of the wear-resistant composite filler comprises the following steps: S1, stirring and mixing aluminum nitrate, zinc nitrate and deionized water to obtain a mixed solution; S2. In an inert atmosphere, slowly drop the mixed solution and the sodium hydroxide aqueous solution into the antioxidant, let it stand, filter out the solid, wash and dry it to obtain a mixture; S3, adding diamond to sodium hydroxide aqueous solution for ultrasonic treatment and then heating, washing the solid, drying, adding to anhydrous ethanol, stirring and mixing, adding a silane coupling agent, mechanically stirring, filtering and taking the solid, washing and drying, to obtain pretreated diamond; S4, melt-extrude the pretreated diamond, the mixture and the compatibilizer, and then pelletize to obtain a wear-resistant composite filler.

2. The compression-resistant and wear-resistant HDPE cable protection tube and its preparation method according to claim 1, characterized in that: In steps S1-S2, the mass ratio of the aluminum nitrate, zinc nitrate, deionized water, sodium hydroxide aqueous solution and antioxidant is 9-10.0:13-16:100:180-200:8.4-9.0; the sodium hydroxide aqueous solution is prepared by mixing sodium hydroxide and deionized water in a dosage ratio of 1 g:20 mL; the antioxidant is prepared by mixing antioxidant 1076 and antioxidant 1010 in a mass ratio of 1:2.5-3.

0.

3. The compression-resistant and wear-resistant HDPE cable protection tube and its preparation method according to claim 1, characterized in that: In step S2, the inert atmosphere is a nitrogen inert atmosphere; the standing time is 12-15 hours; the washing is washing with deionized water until neutral; and the drying is drying at a temperature of 80-90° C. to constant weight.

4. The compression-resistant and wear-resistant HDPE cable protection tube and its preparation method according to claim 1, characterized in that: In step S3, the volume concentration of the sodium hydroxide aqueous solution is 20%; the ultrasonic treatment time is 3-8 minutes; the heating treatment is heating at 80-85°C for 3-4 hours; the washing is washing with deionized water until neutral; the drying is drying at 90°C to constant weight; the mechanical stirring is stirring at 50-60°C and 400-500r / min for 4-6 hours; the washing is washing 3 times with anhydrous ethanol; and the drying is drying at 90°C to constant weight.

5. The compression-resistant and wear-resistant HDPE cable protection tube and its preparation method according to claim 1, characterized in that: In step S3, the mass ratio of the diamond, the sodium hydroxide aqueous solution, the anhydrous ethanol and the silane coupling agent is 6-9:30-40:45-50:3.4-4.0; and the silane coupling agent is silane coupling agent NQ62.

6. The compression-resistant and wear-resistant HDPE cable protection tube and the preparation method thereof according to claim 1, characterized in that: In step S4, the temperature of the melt extrusion is 190-210°C.

7. The compression-resistant and wear-resistant HDPE cable protection tube and its preparation method according to claim 1, characterized in that: In step S4, the mass ratio of the pretreated diamond, the mixture and the compatibilizer is 3.0-3.6:1.2-1.6:6.2-7.0; the compatibilizer is styrene-butadiene-glyceryl methacrylate copolymer.

8. A method for preparing a compression-resistant and wear-resistant HDPE cable protection tube according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: melting and extruding high-density polyethylene and wear-resistant composite filler at a temperature of 190-210° C., granulating, and molding to obtain the product.

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