Corrosion-resistant high-density polyethylene plate and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a corrosion-resistant high-density polyethylene plate and a preparation method thereof. The corrosion-resistant high-density polyethylene plate is prepared from the following components: 50 to 60 parts of surface modified ultra-high molecular weight polyethylene, 50 to 60 parts of high-density polyethylene, 16 to 20 parts of glass beads, 6 to 10 parts of calcium carbonate, 2 to 6 parts of a lubricating agent and 0.2 to 0.4 part of an antioxidant, the preparation method of the surface modified ultra-high molecular weight polyethylene comprises the following steps: pre-irradiating ultra-high molecular weight polyethylene to obtain pre-irradiated ultra-high molecular weight polyethylene; carrying out grafting treatment on the pre-irradiated ultra-high molecular weight polyethylene to obtain grafted ultra-high molecular weight polyethylene; and modifying the grafted ultra-high molecular weight polyethylene by using maleic rosin ethylene glycol acrylate to obtain the surface modified ultra-high molecular weight polyethylene.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer materials, and particularly relates to a corrosion-resistant high-density polyethylene sheet and a preparation method thereof. Background Art

[0002] Polyethylene sheets are polymer materials mainly made of polyethylene resin. Besides having excellent impact resistance, wear resistance, hygienic non-toxicity, corrosion resistance, self-lubrication and low-temperature resistance, polyethylene also has excellent properties such as non-absorbency, non-stickiness and low density. Its comprehensive performance stands out among many materials. Polyethylene sheets have a very wide range of applications, including vacuum chamber panels, paper cutter bushings, sludge scrapers in sewage treatment plants, slurry pump impellers, bearing liners, etc. Polyethylene is highly favored for its wear resistance and self-lubrication. It not only has excellent performance in fields such as chemical drugs and biomedicine, but also is widely used in liners of medical devices such as artificial hip joints and knee joints, as well as medical devices such as tissue scaffolds and blood pumps.

[0003] Chinese Patent (Publication No. CN117417585A) discloses an easily processed ultra-wear-resistant ultra-high molecular weight polyethylene composition and a process for producing sheets of this composition. The process for producing sheets of the easily processed ultra-wear-resistant ultra-high molecular weight polyethylene composition described in this invention includes the following steps: putting ultra-high molecular weight polyethylene resin, high-flowability high-density polyethylene resin, antioxidant, external lubricant, wear-resistant agent and thermal expansion and cold contraction inhibitor into a preheated high-speed mixer, starting the high-speed mixer for mixing and then discharging, and storing it sealed to obtain the composition; extruding the composition through a single-screw extruder to obtain the sheet. However, the corrosion resistance of the polyethylene sheets prepared by the existing technology is insufficient, which affects its further extended use.

[0004] Therefore, how to optimize the components of polyethylene sheets to prepare high-density polyethylene sheets, while ensuring good wear resistance and effectively improving corrosion resistance, has become a research direction. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a corrosion-resistant high-density polyethylene sheet and a preparation method thereof; the present invention uses ultra-high molecular weight polyethylene and high-density polyethylene as the main raw materials, and performs surface modification on the ultra-high molecular weight polyethylene, and cooperates with components such as glass microspheres, calcium carbonate, and lubricants to prepare a high-density polyethylene sheet, which improves the corrosion resistance while ensuring good wear resistance.

[0006] The technical solutions adopted by the present invention to solve the above technical problems are as follows: In the first aspect of the present invention, there is provided a corrosion-resistant high-density polyethylene sheet, which includes the following components in parts by weight: 50 - 60 parts of surface - modified ultra - high - molecular - weight polyethylene, 50 - 60 parts of high - density polyethylene, 16 - 20 parts of glass microspheres, 6 - 10 parts of calcium carbonate, 2 - 6 parts of lubricant, and 0.2 - 0.4 parts of antioxidant.

[0007] As a preferred embodiment, the weight parts of the surface - modified ultra - high - molecular - weight polyethylene in the present invention can be 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, etc.

[0008] As a preferred embodiment, the weight parts of the high - density polyethylene in the present invention can be 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, etc.

[0009] As a preferred embodiment, the weight parts of the glass microspheres in the present invention can be 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0010] As a preferred embodiment, the weight parts of the calcium carbonate in the present invention can be 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.

[0011] As a preferred embodiment, the weight parts of the antioxidant in the present invention can be 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, etc.

[0012] As a preferred embodiment, the preparation method of the surface - modified ultra - high - molecular - weight polyethylene includes: first pre - irradiating the ultra - high - molecular - weight polyethylene to obtain pre - irradiated ultra - high - molecular - weight polyethylene; subjecting the pre - irradiated ultra - high - molecular - weight polyethylene to grafting treatment to obtain grafted ultra - high - molecular - weight polyethylene; using maleic rosin ethylene glycol acrylate to modify the grafted ultra - high - molecular - weight polyethylene to obtain surface - modified ultra - high - molecular - weight polyethylene.

[0013] As a preferred embodiment, the steps of the grafting treatment include: soaking the pre - irradiated ultra - high - molecular - weight polyethylene in an aqueous solution of 0.2 - 0.4 mol / L of N,N'-vinyl bisacrylamide, placing it in a nitrogen environment, treating it at 80 - 90 °C for 12 - 16 h, washing with deionized water, and drying to obtain grafted ultra - high - molecular - weight polyethylene.

[0014] As a preferred embodiment, the steps of the pre - irradiation include: washing and drying the ultra - high - molecular - weight polyethylene, and treating it with Co - γ rays in an air atmosphere to obtain pre - irradiated ultra - high - molecular - weight polyethylene.

[0015] As a preferred embodiment, the steps of the modification treatment include: soaking the grafted ultra-high molecular weight polyethylene in an ethanol solution of maleic rosin glycol acrylate at a concentration of 0.02 - 0.04 mol / L, and performing the modification treatment at 85 - 95 °C for 60 - 80 min.

[0016] As a preferred embodiment, the structural formula of the maleic rosin glycol acrylate is: 。

[0017] In the present invention, N,N'-divinyl bisacrylamide is grafted onto ultra-high molecular weight polyethylene by the Co-γ ray pre-irradiation grafting method. N,N'-divinyl bisacrylamide has two double bonds, and during the pre-irradiation grafting treatment, some of the double bonds do not react, so that polymerization can occur with maleic rosin glycol acrylate, and surface-modified ultra-high molecular weight polyethylene is prepared.

[0018] As a preferred embodiment, the glass microspheres are glass microsphere composites; The preparation method of the glass microsphere composites includes: first performing silane coupling treatment on commercially available glass microspheres to obtain silane-coupled glass microspheres; then performing composite treatment on the silane-coupled glass microspheres and epoxy vinyl ester resin to obtain glass microsphere composites.

[0019] As a preferred embodiment, the steps of the silane coupling treatment include: by weight, adding 16 - 20 parts of commercially available glass microspheres to 100 - 120 parts of a 1.2 - 1.6 mol / L sodium hydroxide solution, stirring at 80 - 90 °C for 70 - 80 min, washing with water and drying, then adding to a mixed solution of 90 - 100 parts of absolute ethanol and 90 - 100 parts of deionized water, and further adding 8 - 10 parts of a silane coupling agent vinyltrimethoxysilane, stirring at 70 - 80 °C for 2 - 3 h, filtering, and drying to obtain silane-coupled glass microspheres.

[0020] As a preferred embodiment, the steps of the composite treatment include: under a nitrogen atmosphere, adding 16 - 20 parts of silane-coupled glass microspheres to 20 - 30 parts of epoxy vinyl ester resin, then adding 0.2 - 0.4 parts of benzoyl peroxide, stirring at 70 - 80 °C for 2 - 3 h, centrifuging, and filtering to obtain glass microsphere composites.

[0021] As a preferred embodiment, the particle size of the commercially available glass microspheres is 2 - 10 μm.

[0022] In the present invention, glass microspheres are first treated with sodium hydroxide by alkali treatment, and then subjected to silane coupling treatment with vinyltrimethoxysilane to introduce double bonds on the surface of the glass microspheres, and then compounded with the double bonds in the epoxy vinyl ester resin, thereby preparing a glass microsphere composite material.

[0023] As a preferred embodiment, the lubricant is silicone powder or calcium stearate.

[0024] As a preferred embodiment, the antioxidant is antioxidant 264 or antioxidant 168.

[0025] In the second aspect of the present invention, there is provided a method for preparing a corrosion-resistant high-density polyethylene sheet as described in the first aspect, comprising the following steps: By weight, 50-60 parts of surface-modified ultra-high molecular weight polyethylene, 50-60 parts of high-density polyethylene, 16-20 parts of glass microspheres, 6-10 parts of calcium carbonate, 2-6 parts of lubricant, and 0.2-0.4 parts of antioxidant are added to a high-speed mixer, and after mixing, the mixture is discharged to obtain a mixture, and the mixture is extruded through a screw extruder to obtain a corrosion-resistant high-density polyethylene sheet.

[0026] As a preferred embodiment, the conditions for the extrusion treatment include: the temperature is 190-200 °C.

[0027] Compared with the prior art, the present invention has the following beneficial effects: (1) In the present invention, the surface-modified ultra-high molecular weight polyethylene forms an anti-corrosion film on the surface by successively introducing N,N'-divinyl bisacrylamide and maleic rosin ethylene glycol acrylate. Its surface structure is dense, the small holes are significantly reduced, the corrosion potential is increased, and the corrosion resistance can be significantly improved; at the same time, the acyl group of N,N'-divinyl bisacrylamide and the carboxyl group and ester group of maleic rosin ethylene glycol acrylate form hydrogen bonds during the polymerization process, constructing a dense network structure and improving the wear resistance.

[0028] (2) In the glass microsphere composite material of the present invention, the epoxy vinyl ester resin can form a dense protective layer to reduce the contact with the corrosive medium. At the same time, the ester bond and benzene ring structure of the epoxy vinyl ester resin make it relatively stable in an acidic and alkaline environment, and the corrosion resistance is significantly improved; at the same time, the epoxy vinyl ester resin can evenly disperse the external force to the surface of the microspheres, reducing local stress concentration and avoiding the aggravation of wear caused by crack propagation. Specific Embodiments

[0029] To facilitate the understanding of the present invention, the following examples are listed. Those skilled in the art should understand that the examples are only for helping to understand the present invention and should not be regarded as specific limitations on the present invention.

[0030] The sources of some components in the examples and comparative examples are as follows: Ultra-high molecular weight polyethylene, product number P77511, was purchased from Shanghai Jizhi Biochemical Technology Co., Ltd.; N,N'-vinylbisacrylamide, product number E124733, was purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.; Commercially available glass microbeads I, brand ZMN-149103-20, particle size 5 μm, purchased from Shanghai Zhenzhun Biotechnology Co., Ltd.; Commercially available glass microbeads II, brand ZMN-149115-50, particle size 90 μm, purchased from Shanghai Zhenzhun Biotechnology Co., Ltd.; Vinyltrimethoxysilane, CAS No. 2768-02-7, purchased from Shanghai MacLean Biochemical Technology Co., Ltd.; Epoxy vinyl ester resin, brand MFE-2, purchased from Huachang Polymer Co., Ltd., East China University of Science and Technology; Benzoyl peroxide, CAS No. 94-36-0, was purchased from Shanghai MacLean Biochemical Technology Co., Ltd.; High-density polyethylene, grade 5000S, purchased from Yanshan Petrochemical; Calcium carbonate, product number C886288, was purchased from Shanghai MacLean Biochemical Technology Co., Ltd.; Silicone powder, model RM4-7081, purchased from Dow Corning; Calcium stearate, CAS No. 1592-23-0, purchased from Shanghai MacLean Biochemical Technology Co., Ltd.; Antioxidant 264, CAS No. 128-37-0, purchased from Zhongshan Xingrui Chemical Co., Ltd.; Antioxidant 168, CAS No. 31570-04-4, was purchased from Zhongshan Dixin Chemical Co., Ltd. Example 1

[0031] This embodiment provides a method for preparing a corrosion-resistant high-density polyethylene sheet, comprising the following steps: In parts by weight, 60 parts of surface modified ultra-high molecular weight polyethylene, 60 parts of high-density polyethylene, 20 parts of glass microsphere composite materials, 10 parts of calcium carbonate, 6 parts of lubricant silicone powder and 0.4 parts of antioxidant 264 are added into a high-speed mixer, mixed and discharged to obtain a mixture, and the mixture is extruded through a screw extruder (at a temperature of 200° C.) to obtain a corrosion-resistant high-density polyethylene sheet.

[0032] Preparation of the surface-modified ultra-high molecular weight polyethylene: Wash and dry the ultra-high molecular weight polyethylene, and treat it with Co-γ rays in an air atmosphere to obtain pre-irradiated ultra-high molecular weight polyethylene; Immerse the pre-irradiated ultra-high molecular weight polyethylene in an aqueous solution of 0.4 mol / L N,N'-vinylbisacrylamide, place it in a nitrogen environment, and treat it at 90 °C for 12 h, wash with deionized water, and dry to obtain grafted ultra-high molecular weight polyethylene; Immerse the grafted ultra-high molecular weight polyethylene in an ethanol solution of 0.04 mol / L maleic rosin ethylene glycol acrylate, and modify it at 95 °C for 60 min to obtain surface-modified ultra-high molecular weight polyethylene.

[0033] Preparation of the glass microsphere composite material: By weight, add 20 parts of commercially available glass microspheres I (grade ZMN-149103-20, particle size of 5 μm) to 120 parts of 1.6 mol / L sodium hydroxide solution, stir at 90 °C for 70 min, wash with water and dry, then add it to a mixed solution of 100 parts of absolute ethanol and 100 parts of deionized water, and then add 10 parts of silane coupling agent vinyltrimethoxysilane, stir at 80 °C for 3 h, filter, and dry to obtain silane-coupled glass microspheres; In a nitrogen atmosphere, add 20 parts of silane-coupled glass microspheres to 30 parts of epoxy vinyl ester resin, then add 0.4 part of benzoyl peroxide, stir at 80 °C for 2 h, centrifuge, and filter to obtain the glass microsphere composite material. Example 2

[0034] This example provides a preparation method of a corrosion-resistant high-density polyethylene sheet, including the following steps: By weight, add 50 parts of surface-modified ultra-high molecular weight polyethylene, 50 parts of high-density polyethylene, 16 parts of glass microsphere composite material, 6 parts of calcium carbonate, 2 parts of lubricant calcium stearate, and 0.2 part of antioxidant 168 to a high-speed mixer, mix and discharge to obtain a mixture, and extrude the mixture through a screw extruder (temperature: 190 °C) to obtain a corrosion-resistant high-density polyethylene sheet.

[0035] Preparation of the surface-modified ultra-high molecular weight polyethylene: Wash and dry the ultra-high molecular weight polyethylene, and treat it with Co-γ rays in an air atmosphere to obtain pre-irradiated ultra-high molecular weight polyethylene; Immerse the pre-irradiated ultra-high molecular weight polyethylene in an aqueous solution of 0.2 mol / L N,N'-vinylbisacrylamide, place it in a nitrogen environment, and treat it at 80 °C for 16 h, wash with deionized water, and dry to obtain grafted ultra-high molecular weight polyethylene; Immerse the grafted ultra-high molecular weight polyethylene in an ethanol solution of 0.02 mol / L maleic rosin ethylene glycol acrylate, and modify it at 85 °C for 80 min to obtain surface-modified ultra-high molecular weight polyethylene.

[0036] Preparation of the glass microsphere composite material: By weight, 16 parts of commercially available glass microspheres I (grade ZMN-149103-20, particle size 5 μm) are added to 100 parts of 1.2 mol / L sodium hydroxide solution, stirred at 80 °C for 80 min, washed with water and dried, then added to a mixed solution of 90 parts of absolute ethanol and 90 parts of deionized water, and then 8 parts of silane coupling agent vinyltrimethoxysilane are added, stirred at 70 °C for 3 h, filtered and dried to obtain silane-coupled glass microspheres; Under a nitrogen atmosphere, 16 parts of silane-coupled glass microspheres are added to 20 parts of epoxy vinyl ester resin, then 0.2 parts of benzoyl peroxide are added, stirred at 70 °C for 3 h, centrifuged and filtered to obtain the glass microsphere composite material. Example 3

[0037] This example provides a method for preparing a corrosion-resistant high-density polyethylene sheet, comprising the following steps: By weight, 55 parts of surface-modified ultra-high molecular weight polyethylene, 55 parts of high-density polyethylene, 18 parts of glass microsphere composite material, 8 parts of calcium carbonate, 4 parts of lubricant silicone powder and 0.3 part of antioxidant 264 are added to a high-speed mixer, and the mixture is discharged after mixing to obtain a mixture. The mixture is extruded through a screw extruder (temperature 195 °C) to obtain a corrosion-resistant high-density polyethylene sheet.

[0038] Preparation of the surface-modified ultra-high molecular weight polyethylene: The ultra-high molecular weight polyethylene is washed and dried, and treated with Co-γ rays in an air atmosphere to obtain pre-irradiated ultra-high molecular weight polyethylene; The pre-irradiated ultra-high molecular weight polyethylene is soaked in a 0.3 mol / L aqueous solution of N,N'-divinylbisacrylamide, placed in a nitrogen environment, and treated at 85 °C for 14 h, washed with deionized water and dried to obtain grafted ultra-high molecular weight polyethylene; The grafted ultra-high molecular weight polyethylene is soaked in an ethanol solution of 0.03 mol / L maleic rosin ethylene glycol ester and modified at 90 °C for 70 min to obtain surface-modified ultra-high molecular weight polyethylene.

[0039] Preparation of the glass microsphere composite material: By weight, 18 parts of commercially available glass microspheres I (grade ZMN-149103-20, particle size 5 μm) are added to 110 parts of 1.4 mol / L sodium hydroxide solution, stirred at 85 °C for 75 min, washed with water and dried, then added to a mixed solution of 95 parts of absolute ethanol and 95 parts of deionized water, and then 9 parts of silane coupling agent vinyltrimethoxysilane are added, stirred at 75 °C for 2.5 h, filtered and dried to obtain silane-coupled glass microspheres; under a nitrogen atmosphere, 18 parts of silane-coupled glass microspheres are added to 25 parts of epoxy vinyl ester resin, then 0.3 part of benzoyl peroxide is added, stirred at 75 °C for 2.5 h, centrifuged and filtered to obtain the glass microsphere composite material. Example 4

[0040] The difference between this example and Example 1 is that commercially available glass microspheres II (grade ZMN-149115-50, particle size 90 μm) are used to replace commercially available glass microspheres I (grade ZMN-149103-20, particle size 5 μm) for the preparation of the glass microsphere composite material.

[0041] Comparative Example 1

[0042] The difference between this comparative example and Example 1 is that commercially available ultra-high molecular weight polyethylene (product number P77511) is used to replace surface-modified ultra-high molecular weight polyethylene, and commercially available glass microspheres I (grade ZMN-149103-20) are used to replace the glass microsphere composite material.

[0043] Comparative Example 2

[0044] The difference between this comparative example and Comparative Example 1 is that the glass microsphere composite material is used to replace commercially available glass microspheres I (grade ZMN-149103-20).

[0045] Comparative Example 3

[0046] The difference between this comparative example and Comparative Example 1 is that surface-modified ultra-high molecular weight polyethylene is used to replace commercially available ultra-high molecular weight polyethylene.

[0047] The properties of the plates provided in the above examples and comparative examples were tested, and the test methods are as follows: (1) Corrosion resistance test: The samples of the examples and comparative examples were respectively placed in a hydrochloric acid solution with a concentration of 1 mol / L and a sodium hydroxide solution with a concentration of 1 mol / L for 24 h, and the weight loss of the samples was counted to judge the corrosion resistance of the samples.

[0048] (2) Abrasion test: The test was carried out with reference to the requirements of "GB / T 5478-2008 Plastics - Test method for rolling wear".

[0049] The above performance test data are shown in Table 1.

[0050] Table 1 Performance Test Results

[0051] As can be seen from the above, in the present invention, ultra-high molecular weight polyethylene and high-density polyethylene are used as the main raw materials, and the ultra-high molecular weight polyethylene is subjected to surface modification treatment, and is combined with components such as glass microsphere composites, calcium carbonate, and lubricants with specific particle sizes to prepare high-density polyethylene sheets (Examples 1 to 3), and their comprehensive performance is the best.

[0052] Compared with Example 1, when commercially available glass microspheres II (brand ZMN-149115-50, particle size 90 μm) are used to replace commercially available glass microspheres I (brand ZMN-149103-20, particle size 5 μm) for the preparation of glass microsphere composites, due to the too large particle size of the commercially available glass microspheres II, the composite effect is not good, and the corrosion resistance becomes poor and the wear resistance decreases (Example 4); compared with Example 1, when commercially available ultra-high molecular weight polyethylene (product number P77511) is used to replace surface-modified ultra-high molecular weight polyethylene, and commercially available glass microspheres I (brand ZMN-149103-20) are used to replace glass microsphere composites, the corrosion resistance becomes poor and the wear resistance decreases (Comparative Example 1); compared with Comparative Example 1, when glass microsphere composites are used to replace commercially available glass microspheres I (brand ZMN-149103-20), the corrosion resistance becomes better and the wear resistance improves (Comparative Example 2); compared with Comparative Example 1, when surface-modified ultra-high molecular weight polyethylene is used to replace commercially available ultra-high molecular weight polyethylene, the corrosion resistance becomes better and the wear resistance improves (Comparative Example 3).

Claims

1. A corrosion-resistant high-density polyethylene sheet, characterized in that by weight, it comprises the following components: 50 - 60 parts of surface-modified ultra-high molecular weight polyethylene, 50 - 60 parts of high-density polyethylene, 16 - 20 parts of glass microspheres, 6 - 10 parts of calcium carbonate, 2 - 6 parts of lubricant, and 0.2 - 0.4 part of antioxidant; The preparation method of the surface-modified ultra-high molecular weight polyethylene includes: first pre-irradiating the ultra-high molecular weight polyethylene to obtain pre-irradiated ultra-high molecular weight polyethylene; grafting the pre-irradiated ultra-high molecular weight polyethylene to obtain grafted ultra-high molecular weight polyethylene; using ethylene glycol maleic rosin acrylate to modify the grafted ultra-high molecular weight polyethylene to obtain surface-modified ultra-high molecular weight polyethylene.

2. The corrosion-resistant high-density polyethylene sheet according to claim 1, characterized in that The steps of the grafting treatment include: soaking the pre-irradiated ultra-high molecular weight polyethylene in an aqueous solution of N,N'-divinyl acrylamide with a concentration of 0.2 - 0.4 mol / L, placing it in a nitrogen environment, treating it at 80 - 90 °C for 12 - 16 h, washing with deionized water, and drying to obtain grafted ultra-high molecular weight polyethylene.

3. The corrosion-resistant high-density polyethylene sheet according to claim 1, characterized in that The steps of the modification treatment include: soaking the grafted ultra-high molecular weight polyethylene in an ethanol solution of ethylene glycol maleic rosin acrylate with a concentration of 0.02 - 0.04 mol / L, and carrying out modification treatment at 85 - 95 °C for 60 - 80 min.

4. The corrosion-resistant high-density polyethylene sheet according to claim 3, characterized in that The structural formula of the ethylene glycol maleic rosin acrylate is: 。 5. The corrosion-resistant high-density polyethylene sheet according to claim 1, characterized in that The glass microspheres are glass microsphere composites; The preparation method of the glass microsphere composites includes: first carrying out silane coupling treatment on commercially available glass microspheres to obtain silane-coupled glass microspheres; then carrying out composite treatment on the silane-coupled glass microspheres and epoxy vinyl ester resin to obtain glass microsphere composites.

6. The corrosion-resistant high-density polyethylene sheet according to claim 5, characterized in that The steps of the silane coupling treatment include: by weight, adding 16 - 20 parts of commercially available glass microspheres to 100 - 120 parts of a sodium hydroxide solution with a concentration of 1.2 - 1.6 mol / L, stirring at 80 - 90 °C for 70 - 80 min, washing and drying with water, then adding it to a mixed solution of 90 - 100 parts of absolute ethanol and 90 - 100 parts of deionized water, and then adding 8 - 10 parts of a silane coupling agent vinyltrimethoxysilane, stirring at 70 - 80 °C for 2 - 3 h, filtering, and drying to obtain silane-coupled glass microspheres.

7. The corrosion-resistant high-density polyethylene sheet according to claim 5, characterized in that The steps of the composite treatment include: under a nitrogen atmosphere, adding 16 - 20 parts of silane - coupled glass micro - beads into 20 - 30 parts of epoxy vinyl ester resin, then adding 0.2 - 0.4 parts of benzoyl peroxide, stirring at 70 - 80 °C for 2 - 3 h, centrifuging, and filtering to obtain a glass micro - bead composite material.

8. A corrosion - resistant high - density polyethylene sheet according to claim 5, characterized in that the particle size of the commercially available glass micro - beads is 2 - 10 μm.

9. A corrosion - resistant high - density polyethylene sheet according to claim 1, characterized in that the lubricant is silicone powder or calcium stearate.

10. A method for preparing a corrosion - resistant high - density polyethylene sheet according to any one of claims 1 - 9, characterized in that it comprises the following steps: By weight, adding 50 - 60 parts of surface - modified ultra - high - molecular - weight polyethylene, 50 - 60 parts of high - density polyethylene, 16 - 20 parts of glass micro - beads, 6 - 10 parts of calcium carbonate, 2 - 6 parts of lubricant, and 0.2 - 0.4 parts of antioxidant into a high - speed mixer, discharging the mixture after mixing, and extruding the mixture through a screw extruder to obtain a corrosion - resistant high - density polyethylene sheet.

Images