Wear-resistant and corrosion-resistant pipe fitting and preparation method thereof

Abstract

The application belongs to the technical field of material composite, and particularly relates to a kind of wear-resistant and corrosion-resistant pipe fittings of ultra-high molecular weight polyethylene and a preparation method thereof.The proportions of each component of the wear-resistant and corrosion-resistant pipe fitting are as follows:100 parts of ultra-high molecular weight polyethylene, 5-25 parts of leveling agent, 0.5-10 parts of silicone oil, and 0.1-5 parts of nanoparticles.The inorganic particles are dispersed in silicone oil, placed in a pulverizer for dispersion and pulverization to obtain nanosheet layers, then compounded with the leveling agent to obtain an intermediate product of nanocore-shell structure, and then organic ultra-high molecular weight polyethylene is added to form a transition layer with good compatibility and high interfacial bonding strength on the interface between the inorganic particles and the organic powder.The prepared wear-resistant and corrosion-resistant pipe fitting has a peeling strength of greater than or equal to 30 KN / m, a simply supported beam impact strength of greater than or equal to 30 MPa, a friction coefficient of greater than or equal to 0.05, and an abrasion of greater than or equal to 0.7%, which fills a technical gap and meets the use requirements of pipeline engineering installation and connection for conveying slurry materials in mines and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of material composite, and particularly relates to a wear-resistant and corrosion-resistant pipe fitting of ultra-high molecular weight polyethylene and a preparation method thereof. BACKGROUND

[0002] Ultra-high molecular weight polyethylene refers to polyethylene with a viscosity average molecular weight of 1.5 million or above, and is a new type of engineering plastic with the best comprehensive performance among current engineering plastics. It has a very high relative molecular mass, so it has many excellent properties: ① excellent wear resistance, which is several times that of general carbon steel and copper metal, and 4 times that of PA66; ② extremely high impact strength, which is 10 times that of PA66 and polypropylene; ③ can absorb vibration impact and prevent noise; ④ low friction coefficient, can self-lubricate; ⑤ not easy to adhere to foreign matter, has excellent anti-sticking property when sliding; ⑥ resistant to chemical corrosion; ⑦ wide working range, from -265 DEG C to +80 DEG C, can maintain good toughness and strength; ⑧ non-toxic, can be recycled.

[0003] However, due to its highly entangled molecular structure, it has no flowability above the melting point, and cannot be extruded, injection molded or blow molded by conventional machinery. Flow modification of ultra-high molecular weight polyethylene can make it extruded into a pipe by hard top method or melt method on a single screw extruder, but the pipe fitting matched with the pipe becomes a difficulty in engineering construction and installation application. SUMMARY

[0004] The purpose of the present application is to overcome the defects of the prior art and provide a special material for spraying ultra-high molecular weight polyethylene pipe fittings and a preparation method of the pipe fittings.

[0005] The purpose of the present application can be achieved by the following technical scheme: a wear-resistant and corrosion-resistant pipe fitting, which comprises 100 parts of ultra-high molecular weight polyethylene, 5-25 parts of a leveling agent, 0.5-10 parts of silicone oil and 0.1-5 parts of nano particles by weight, and then the mixture is sprayed onto the inner surface of a 150 DEG C-250 DEG C steel pipe fitting by a melt blowing gun, and after the mixture is cooled, a 3-10 mm ultra-high molecular weight polyethylene film layer is formed, thereby preparing a wear-resistant and corrosion-resistant steel-lined ultra-high molecular weight polyethylene pipe fitting.

[0006] The ultra-high molecular weight polyethylene has a viscosity average molecular weight of 1.5 million to 3 million.

[0007] The leveling agent is one or more of amide wax, oleic acid amide, erucic acid amide, vinyl bis-stearamide and stearic acid amide.

[0008] The silicon oil is one or more of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl ethyl silicone oil, methyl ethoxy silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen-containing silicone oil with a molecular weight of 15000-30000.

[0009] The nanoparticles are one or more of nanometer molybdenum disulfide, nanometer graphite, nanometer graphene, nanometer tungsten disulfide, carbon nanotube, nanometer silicon nitride.

[0010] The multi-stage dispersion process is that the inorganic particles are dispersed in the silicon oil, put into a high-speed pulverizer for dispersion and pulverization for 60-300 minutes to prepare the oil-phase nanoparticles with a size of 5-500 nanometers, then put into a high-speed dispersion kneader with a leveling agent for 30-60 minutes to form the intermediate product of the nanometer core-shell structure of the inorganic particle core and the organic leveling agent shell, and then mix the intermediate product and the ultra-high molecular weight polyethylene in a high-speed mixer for 10-30 minutes to prepare the ultra-high molecular weight polyethylene pipe spraying special material.

[0011] The preparation method of the ultra-high molecular weight polyethylene pipe spraying special material and the pipe, characterized in that the ultra-high molecular weight polyethylene pipe spraying special material is sprayed to the inner surface of a 150℃-250℃ steel pipe by a melt-blowing gun, and the mixture is cooled to form a 3-10mm ultra-high molecular weight polyethylene film layer to prepare the wear-resistant and corrosion-resistant steel lining ultra-high molecular weight polyethylene pipe.

[0012] Compared with the prior art, the method has the following advantages: the inorganic particles are dispersed in the silicon oil, put into a high-speed pulverizer for dispersion and pulverization to prepare the nanometer sheet layer ultra-thin self-lubricating and easily dispersed oil-like loaded particles in the organic phase. Then the leveling agent is compounded to obtain the intermediate product of the nanometer core-shell structure of the inorganic particle core and the organic leveling agent shell. The intermediate product of the core-shell structure can make the inorganic particles well dispersed and compounded in the organic ultra-high molecular weight polyethylene at a nanometer level, and the interface between the inorganic particles and the organic powder has a transition layer with good compatibility and high interface bonding strength. The prepared wear-resistant and corrosion-resistant pipe has a peeling strength of ≥30KN / m, a simply supported beam impact strength of ≥30MPa, a friction coefficient of ≥0.055, and an abrasion of ≥0.7%, which fills the technical gap and meets the use requirements of the pipe engineering installation connection for conveying slurry materials in mines. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a flowchart of the preparation method of the wear-resistant and corrosion-resistant pipe. DETAILED DESCRIPTION

[0014] The application will be described in detail below with specific examples.

[0015] The wear-resistant and corrosion-resistant pipe joint comprises the following components in parts: 100 parts of ultra-high molecular weight polyethylene,

[0016] 5-25 parts of a leveling agent,

[0017] 0.5-10 parts of silicone oil,

[0018] 0.1-5 parts of nanoparticles.

[0019] The ultra-high molecular weight polyethylene has a viscosity-average molecular weight of 1.5-3 million.

[0020] The leveling agent is one or more of amide wax, oleic acid amide, erucic acid amide, vinyl bis-stearamide and stearic acid amide.

[0021] The silicone oil is one or more of methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen-containing silicone oil, methyl ethyl silicone oil, methyl ethoxy silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen-containing silicone oil with a molecular weight of 15,000-30,000.

[0022] The nanoparticles are one or more of nanometer molybdenum disulfide, nanometer graphite, nanometer graphene, nanometer tungsten disulfide, carbon nanotube and nanometer silicon nitride.

[0023] As shown in the accompanying drawings, Figure 1 The application also provides a method for preparing the wear-resistant and corrosion-resistant pipe joint.

[0024] S1) respectively weighing the components according to the design,

[0025] S2) mixing the weighed components uniformly by using a multi-stage dispersion process, so as to obtain the wear-resistant and corrosion-resistant spraying material;

[0026] S3) spraying the wear-resistant and corrosion-resistant spraying material on the steel pipe joint by using a melt-blowing gun, so as to obtain the wear-resistant and corrosion-resistant pipe joint with a steel lining.

[0027] The specific steps of the multi-stage dispersion process in S2) are as follows:

[0028] The inorganic particles are dispersed in the silicone oil and placed in a high-speed pulverizer for dispersion and pulverization for 60-300 minutes, so as to prepare 5-500 nanometer oil-phase nanoparticles, and then the nanoparticles are placed in a high-speed dispersion kneader for 30-60 minutes, so as to form a nanometer inorganic particle core and an organic leveling agent shell, thereby forming a nanometer core-shell structure intermediate product, and then the intermediate product and the ultra-high molecular weight polyethylene are mixed in a high-speed mixer for 10-30 minutes.

[0029] The specific steps of S3) are as follows:

[0030] The wear-resistant and corrosion-resistant spray paint is sprayed to the inner surface of the steel pipe fitting heated to 150-250°C by a melt spraying gun, and a 3-10 mm ultra-high molecular weight polyethylene film layer is formed after the mixture is cooled.

[0031] The diameter of the steel pipe fitting is not less than 100 mm.

[0032] The peel strength of the wear-resistant and corrosion-resistant pipe fitting is ≥30 KN / m, the simply supported beam impact strength is ≥30 MPa, the friction coefficient is ≥0.05, and the abrasion is ≥0.7%.

[0033] Example 1

[0034] The 0.1 part of molybdenum disulfide is dispersed in 0.5 parts of methyl silicone oil and placed in a high-speed pulverizer for 300 minutes to prepare 5 nm oil-phase molybdenum disulfide, which is then placed in 5 parts of amide wax for high-speed dispersion and kneading for 10 minutes. The intermediate product and 100 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 1.5 million are mixed in a high-speed mixer for 10 minutes to prepare the ultra-high molecular weight polyethylene pipe fitting spraying special material. The ultra-high molecular weight polyethylene pipe fitting spraying special material is sprayed to the inner surface of a 200°C steel pipe fitting (diameter 800 mm) by a melt spraying gun, and a 5 mm ultra-high molecular weight polyethylene film layer is formed after the mixture is cooled to prepare a steel-lined ultra-high molecular weight polyethylene pipe fitting.

[0035] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe fitting are shown in Table 1.

[0036] Example 2

[0037] The 0.5 part of graphite is dispersed in 2 parts of ethyl silicone oil and placed in a high-speed pulverizer for 100 minutes to prepare 100 nm oil-phase graphite, which is then placed in 10 parts of erucic amide for high-speed dispersion and kneading for 20 minutes. The intermediate product and 100 parts of ultra-high molecular weight polyethylene with a viscosity-average molecular weight of 2 million are mixed in a high-speed mixer for 20 minutes to prepare the ultra-high molecular weight polyethylene pipe fitting spraying special material. The ultra-high molecular weight polyethylene pipe fitting spraying special material is sprayed to the inner surface of a 150°C steel pipe fitting (diameter 500 mm) by a melt spraying gun, and a 3 mm ultra-high molecular weight polyethylene film layer is formed after the mixture is cooled to prepare a steel-lined ultra-high molecular weight polyethylene pipe fitting.

[0038] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe fitting are shown in Table 1.

[0039] Example 3

[0040] The 0.4 parts of molybdenum disulfide and 0.4 parts of tungsten disulfide were dispersed in 6 parts of methyl ethyl silicone oil and put into a high-speed pulverizer for 290 minutes to prepare 10 nanometer oil-phase molybdenum disulfide and tungsten disulfide, and then put into 12 parts of vinyl bis-stearamide for high-speed dispersion kneading for 30 minutes, and then the intermediate product and 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 2 million were mixed in a high-speed mixer for 30 minutes to prepare the ultra-high molecular weight polyethylene pipe spraying special material. The ultra-high molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 210°C steel pipe (diameter 1200 mm) by a melt spraying gun, and after the mixture cooled, a 7 mm ultra-high molecular weight polyethylene film layer was formed to prepare a steel-lined ultra-high molecular weight polyethylene pipe.

[0041] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0042] Example 4

[0043] The 1.2 parts of graphene were dispersed in 5 parts of methyl ethyl silicone oil and put into a high-speed pulverizer for 280 minutes to prepare 20 nanometer oil-phase graphene, and then put into 15 parts of oleic acid amide for high-speed dispersion kneading for 40 minutes, and then the intermediate product and 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 2.5 million were mixed in a high-speed mixer for 30 minutes to prepare the ultra-high molecular weight polyethylene pipe spraying special material. The ultra-high molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 240°C steel pipe (diameter 900 mm) by a melt spraying gun, and after the mixture cooled, an 8 mm ultra-high molecular weight polyethylene film layer was formed to prepare a steel-lined ultra-high molecular weight polyethylene pipe.

[0044] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0045] Example 5

[0046] The 1.8 parts of tungsten disulfide were dispersed in 8 parts of methyl phenyl silicone oil and put into a high-speed pulverizer for 110 minutes to prepare 300 nanometer oil-phase tungsten disulfide, and then put into 8 parts of stearic acid amide for high-speed dispersion kneading for 20 minutes, and then the intermediate product and 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 2.7 million were mixed in a high-speed mixer for 25 minutes to prepare the ultra-high molecular weight polyethylene pipe spraying special material. The ultra-high molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 250°C steel pipe (diameter 1000 mm) by a melt spraying gun, and after the mixture cooled, a 4 mm ultra-high molecular weight polyethylene film layer was formed to prepare a steel-lined ultra-high molecular weight polyethylene pipe.

[0047] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0048] Example 6

[0049] The 2.5 parts of silicon nitride were dispersed in 7 parts of methyl silicone oil and put into a high-speed pulverizer for dispersion and pulverization for 230 minutes to prepare 50 nm oil-phase silicon nitride, which was then put into 20 parts of erucamide for high-speed dispersion and kneading for 60 minutes. The intermediate product was mixed with 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 1.8 million in a high-speed mixer for 15 minutes to prepare the ultra-high molecular weight polyethylene pipe spraying special material. The ultra-high molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 245 °C steel pipe (400 mm in diameter) by a melt spraying gun, and after the mixture cooled, a 10 mm ultra-high molecular weight polyethylene film layer was formed on the steel pipe to prepare a steel-lined ultra-high molecular weight polyethylene pipe.

[0050] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0051] Example 7

[0052] The 1.8 parts of molybdenum disulfide and 1.2 parts of silicon nitride were dispersed in 10 parts of methyl hydrogen silicone oil and put into a high-speed pulverizer for dispersion and pulverization for 290 minutes to prepare 10 nm oil-phase molybdenum disulfide and silicon nitride, which was then put into 22 parts of amide wax for high-speed dispersion and kneading for 30 minutes. The intermediate product was mixed with 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 3 million in a high-speed mixer for 22 minutes to prepare the ultra-high molecular weight polyethylene pipe spraying special material. The ultra-high molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 245 °C steel pipe (1300 mm in diameter) by a melt spraying gun, and after the mixture cooled, a 6 mm ultra-high molecular weight polyethylene film layer was formed on the steel pipe to prepare a steel-lined ultra-high molecular weight polyethylene pipe.

[0053] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0054] Example 8

[0055] The 4.1 parts of tungsten disulfide were dispersed in 9 parts of methyl silicone oil and put into a high-speed pulverizer for dispersion and pulverization for 150 minutes to prepare 250 nm oil-phase tungsten disulfide, which was then put into 23 parts of oleic acid amide for high-speed dispersion and kneading for 40 minutes. The intermediate product was mixed with 100 parts of ultra-high molecular weight polyethylene with a viscosity average molecular weight of 1.6 million in a high-speed mixer for 12 minutes to prepare the ultra-high molecular weight polyethylene pipe spraying special material. The ultra-high molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 200 °C steel pipe (1500 mm in diameter) by a melt spraying gun, and after the mixture cooled, a 4 mm ultra-high molecular weight polyethylene film layer was formed on the steel pipe to prepare a steel-lined ultra-high molecular weight polyethylene pipe.

[0056] The performance indicators of the ultra-high molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0057] Example 9

[0058] 4.5 parts of carbon nanotubes were dispersed in 4 parts of methyl silicone oil and 4 parts of ethyl hydrogen-containing silicone oil in a high-speed pulverizer for 90 minutes to prepare 350-nanometer oil-phase carbon nanotubes, which were then put into 12 parts of amide wax and 12 parts of erucic amide for high-speed dispersion and kneading for 50 minutes. The intermediate product and 100 parts of ultrahigh molecular weight polyethylene with a viscosity-average molecular weight of 2.3 million were mixed in a high-speed mixer for 25 minutes to prepare the ultrahigh molecular weight polyethylene pipe spraying special material. The ultrahigh molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 240℃ steel pipe (300 mm in diameter) by a melt-blowing gun, and a 3-mm ultrahigh molecular weight polyethylene film layer was formed on the mixture after cooling to prepare a steel-lined ultrahigh molecular weight polyethylene pipe.

[0059] The performance indicators of the ultrahigh molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0060] Example 10

[0061] 5.0 parts of graphite were dispersed in 5 parts of ethyl silicone oil in a high-speed pulverizer for 60 minutes to prepare 500-nanometer oil-phase graphite, which were then put into 25 parts of amide wax for high-speed dispersion and kneading for 45 minutes. The intermediate product and 100 parts of ultrahigh molecular weight polyethylene with a viscosity-average molecular weight of 2.4 million were mixed in a high-speed mixer for 11 minutes to prepare the ultrahigh molecular weight polyethylene pipe spraying special material. The ultrahigh molecular weight polyethylene pipe spraying special material was sprayed onto the inner surface of a 230℃ steel pipe (100 mm in diameter) by a melt-blowing gun, and a 9-mm ultrahigh molecular weight polyethylene film layer was formed on the mixture after cooling to prepare a steel-lined ultrahigh molecular weight polyethylene pipe.

[0062] The performance indicators of the ultrahigh molecular weight polyethylene film layer and the pipe are shown in Table 1.

[0063] Table 1 Mechanical properties of pipes in examples

[0064]

[0065] Note: The abrasion, friction coefficient and simply supported beam impact strength refer to the performance of the ultrahigh molecular weight polyethylene film. The peeling strength refers to the peeling strength of the ultrahigh molecular weight polyethylene film and the steel pipe.

[0066] The above provides a detailed description of the wear-resistant and corrosion-resistant pipe and the preparation method thereof. The above description of the examples is only used to help understand the method and its core idea; meanwhile, for those skilled in the art, the specific implementation and application range will be changed according to the idea of the present application. Therefore, the content of the description should not be understood as a limitation of the present application.

[0067] As used in the specification and claims, certain terms have particular meanings. One skilled in the art will understand that different manufacturers can refer to a component by different names. The specification and claims should not be construed as limited to components by a particular name, but should be construed by the component's function. As used in the specification and claims, "comprising" and "including" are meant to be interpreted as specifying open-ended claims that are not limited to the listed elements. "Approximately" means within an acceptable error range for the corresponding function, which will vary from one context to another. The description that follows is intended to provide a better understanding of the preferred embodiments of the present application, and is not intended to provide an exhaustive description of the application. The description serves only to illustrate the general principles of the application, and is not intended to limit the present application to specific embodiments. The scope of the present application is to be limited only by the claims that follow.

[0068] It should also be noted that the terms "comprising," "including," and "having" or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, product, or composition that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, product, or composition. In other words, unless expressly stated to the contrary, the process, product, or composition that "comprises," "includes," or "has" an element or a list of elements does not exclude other elements from being present in the process, product, or composition, or affecting the process, product, or composition.

[0069] It should be understood that the term "and / or" as used herein is merely an open-ended descriptive term indicating that three conditions exist, for example, A and / or B can mean: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " as used herein generally represents an "or" relationship between the front and rear associated objects.

[0070] The above description illustrates and describes the only preferred embodiments of the present application. However, it is to be understood that the application is not limited to the disclosed embodiments, and that it is not to be limited to the precise details of construction or the arrangements of the components set forth in the disclosed embodiments. Changes in form and substitution of equivalents are contemplated as circumstances might suggest or render expedient. It is intended that the application not be limited to the disclosed embodiments, but that it be accorded the widest scope consistent with the claims to follow.

Claims

1. A method of making a wear and corrosion resistant pipe fitting, characterized by, The method specifically comprises the following steps: S1) weighing each component according to the design component, The parts of each component of the wear-resistant and corrosion-resistant pipe fitting are: 100 parts of ultra-high molecular weight polyethylene, 5-25 parts of leveling agent, 0.5-10 parts of silicone oil, and 0.1-5 parts of inorganic particles; S2) mixing the weighed components uniformly by using a multi-stage dispersion process, that is, obtaining the wear-resistant and corrosion-resistant spray coating; The specific steps of the multi-stage dispersion process are: dispersing the inorganic particles in the silicone oil, placing them in a high-speed pulverizer for 60-300 minutes of dispersion and pulverization, preparing 5-500 nanometer oil-phase nanoparticles, then putting them into a leveling agent for high-speed dispersion and kneading for 30-60 minutes, forming a nano-core-shell structure intermediate product of nano inorganic particle core and organic leveling agent shell, and then mixing the intermediate product and the ultra-high molecular weight polyethylene in a high-speed mixer for 10-30 minutes; S3) spraying the wear-resistant and corrosion-resistant spray coating on the steel pipe fitting by using a melt blowing gun, that is, obtaining the wear-resistant and corrosion-resistant pipe fitting with a steel lining; The specific steps are: spraying the wear-resistant and corrosion-resistant spray coating on the inner surface of the steel pipe fitting heated to 150-250 DEG C by using a melt blowing gun, and after the mixture cools down, forming a 3-10 millimeter ultra-high molecular weight polyethylene film layer.

2. The production method according to claim 1, characterized by, The ultra-high molecular weight polyethylene has a viscosity average molecular weight of 1.5-3 million.

3. The preparation method according to claim 1, characterized in that, The leveling agent is one or more of amide wax, oleic acid amide, erucic acid amide, vinyl bis-stearyl amide, and stearic acid amide.

4. The method of claim 1, wherein, The silicone oil is one or more of methyl silicone oil, ethyl silicone oil and phenyl silicone oil with a molecular weight of 15,000-30,000.

5. The preparation method according to claim 1, characterized in that, The inorganic particles are one or more of nano-molybdenum disulfide, nano-graphite, nano-graphene, nano-tungsten disulfide, carbon nanotube, and nano-silicon nitride.

6. The method of claim 1, wherein, The diameter of the steel pipe fitting in S3) is not less than 100 mm.

7. The preparation method according to claim 1, characterized in that, The wear-resistant and corrosion-resistant pipe fitting has a peel strength of ≥30 KN / m, a simply supported beam impact strength of ≥30 MPa, a friction coefficient of ≥0.05, and an abrasion of ≥0.7%.

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