An antistatic polyethylene masterbatch containing organic ionic liquid, preparation method and pipe

Abstract

The present invention discloses an antistatic polyethylene masterbatch containing an organic ionic liquid, a preparation method and a pipe. The antistatic polyethylene masterbatch is obtained by mixing raw materials including the following components: polyethylene, a conductive filler and an organic ionic liquid; the organic ionic liquid is an organic liquid containing cations and anions. The present invention can improve the dispersibility of the conductive carrier in polyethylene, and at the same time, the ionic liquid has conductivity, which greatly reduces the percolation threshold of the conductive system. Moreover, due to the low viscosity of the ionic liquid, it can improve the flexibility of the system, just like a plasticizer. The surface resistance or volume resistance of the HDPE pipe prepared using the masterbatch of the present invention is not higher than 10~10 5 Ω, with excellent flexibility.

Description

Technical Field

[0001] The present invention relates to the technical field of pipes, and more particularly to an antistatic polyethylene masterbatch containing an organic ionic liquid, a preparation method and a pipe. Background Art

[0002] Plastic pipes, such as polyethylene pipes, are widely used to replace steel pipes for the transportation of water, oil, and natural gas due to their safety and cost-effectiveness. However, during use, plastic products are prone to static electricity generation due to friction, collision, and contact with other objects. Polyethylene plastic has extremely high electrical resistance, so the static electricity generated is difficult to transfer, resulting in a high accumulation of static electricity, which poses a safety hazard to production applications. To reduce static electricity accumulation, plastic pipes are required to have certain electrical conductivity and antistatic properties. In addition, to meet different application conditions, polyethylene pipes are also required to have high strength, high nominal strain at break, impact resistance, and easy bending, that is, good flexibility.

[0003] High-density polyethylene (HDPE) is widely used in pipes due to its excellent overall performance and low cost. Compared to linear polyethylene (LP), HDPE has higher strength and modulus. To enhance antistatic properties, conductive carbon black or other conductive fillers are often added to plastics to increase conductivity. However, the addition of conductive carbon black often makes the polyethylene brittle and difficult to bend, resulting in reduced elongation and impact strength (i.e., reduced flexibility). This problem is even more severe for HDPE. Achieving both moderate conductivity and good flexibility in HDPE is a difficult problem.

[0004] The patent "A Carbon Nanotube Reinforced Polyethylene Tube (CN102850628A)" describes the use of PE / CNT composite materials in pipeline production to improve the mechanical properties and thermal oxidative aging properties of the pipeline. The composite material contains the following components by weight: 70-100 parts of high-density polyethylene; 1-10 parts of carbon nanotubes. The carbon nanotube reinforced polyethylene tube described in this invention has excellent flexibility and formability; the carbon nanotubes are evenly distributed in the polyethylene matrix and have basically the same orientation, are firmly bonded to the matrix, and will not dissipate or be lost due to friction, and have good durability; there is no conflict with other additives, and they work well together, and the antistatic properties, mechanical strength and thermal aging properties of the composite material are improved. However, the solution method used in this patent application to treat carbon nanotubes using an aluminum-titanium composite coupling agent requires a large amount of organic solvents, and the surface resistance of the resulting HDPE pipe is greater than 10 8 Ω, which is not suitable for most current applications.

[0005] The patent "Specialized Material for Permanently Antistatic and Flexible Polyethylene Pipe (CN104262751A)" describes a specially formulated material for medium-density polyethylene pipes that is permanently antistatic and flexible, based on a conductive carbon black composite. To enhance carbon black dispersibility and improve performance, the compound incorporates a thermoplastic elastomer, dispersant, antioxidant, release agent, and liquid lubricant. The flexibility (nominal strain at break and impact strength) of medium-density polyethylene (LLDPE) is generally much greater than that of high-density polyethylene (HDPE), so the addition of a large amount of conductive carbon black has relatively little effect on flexibility. At the same time, the strength and modulus of medium-density polyethylene pipes are lower than those of HDPE, which limits their application.

[0006] Under the premise of not affecting processing efficiency, it has always been a technical difficulty in this field to simultaneously solve the problems of antistatic performance and flexibility (i.e., high nominal strain at break and high impact strength) of HDPE pipes. Summary of the Invention

[0007] To address the problems existing in the prior art, the present invention provides an antistatic polyethylene masterbatch containing an organic ionic liquid, a preparation method, and a pipe. The organic ionic liquid of the present invention has a strong interaction with the conductive carrier, which helps improve the dispersibility of the conductive carrier in the polyethylene. The ionic liquid is also conductive, significantly lowering the percolation threshold for conductivity in the system. Furthermore, the low viscosity of the ionic liquid acts like a plasticizer, improving the flexibility of the system. The polyethylene masterbatch containing the conductive filler and the organic ionic liquid of the present invention can be used in pipe production.

[0008] One of the objects of the present invention is to provide an antistatic polyethylene masterbatch containing an organic ionic liquid.

[0009] The antistatic polyethylene masterbatch is obtained by mixing raw materials including the following components:

[0010] Polyethylene, conductive filler, organic ionic liquid;

[0011] The organic ionic liquid is an organic liquid containing cations and anions;

[0012] Taking the total weight of the masterbatch raw materials as 100wt%, the weight percentage of each component is:

[0013] Polyethylene 35-95wt%;

[0014] Conductive filler 0.1-60wt%;

[0015] Organic ionic liquid 0.01-10wt%;

[0016] The preferred dosage of each component is:

[0017] Polyethylene 50-84wt%; more preferably 55-80wt%

[0018] Conductive filler 15-45wt%;

[0019] Organic ionic liquid 1-5wt%;

[0020] In a preferred embodiment of the present invention, the organic ionic liquid is at least one of an imidazolium salt, a pyridinium salt, and a pyrazolium salt; preferably, the organic ionic liquid contains phosphorus anions and halogen anions, more preferably, contains fluorine-containing phosphorus anions.

[0021] In a preferred embodiment of the present invention, the cation portion of the organic ionic liquid contains a long-chain alkyl group with 8 or more carbon atoms; the organic ionic liquid also contains a carbon-carbon double bond group, preferably at least one of vinyl and propenyl groups. Ionic liquids containing carbon-carbon double bond groups can be easily grafted onto polyolefins and can exist stably within the polyolefin without local phase separation.

[0022] More specifically, the chemical structure of the organic ionic liquid of the present invention is shown below:

[0023] Cations

[0024]

[0025] Anions Cl - DF4 - I - PF6 -

[0026]

[0027] Any cation can form an ionic liquid with any anion. Preferably, the organic ionic liquid contains imidazolium, pyridinium and / or pyrazolium. These organic ions have a strong interaction with conductive fillers such as carbon black or carbon nanotubes, which can increase the dispersion of these conductive fillers in polyethylene, while also reducing the aggregation of fillers, increasing the conductivity of the pipe while also increasing the nominal strain at break and impact strength. Further preferred ionic liquids have an anion portion containing a long-chain alkyl group with 8 or more carbon atoms, and further preferred ionic liquids contain a phosphorus anion (phosphonium), in particular a fluorine-containing phosphorus anion (PF6).

[0028] Further preferred organic ionic liquids contain imidazolium, pyridinium and / or pyrazolium. Imidazolium, pyridinium and pyrazolium contain carbon-carbon double bond groups, such as vinyl, propenyl, or other similar unsaturated groups. This makes it easier to undergo grafting reaction with polyethylene to obtain ionic liquid-modified polyethylene, thereby further improving the mechanical properties and conductive properties.

[0029] In a preferred embodiment of the present invention, the conductive filler is at least one of carbon black, carbon nanotubes, and graphene nanoparticles. The particle size of the carbon black is 5-50nm, and the oil absorption value is 100-500ml / 100g. Preferably, the oil absorption value of the carbon black is greater than 200ml / 100g. The carbon nanotubes are at least one of single-walled carbon nanotubes, multi-walled carbon nanotubes, and tubular graphene nanotubes; the carbon nanotubes can be purified HiPco single-walled carbon nanotubes purchased from Carbon Nano Manufacturing Company; multi-walled carbon nanotubes (AD MWNTs) are purchased from Aldrich. Tubular graphene nanotubes (SWNT) MWNTs are commercial MWNTs: NTP3003 from Dynanomic Inc., with an outer diameter of 7-15nm; or FT9000 from Cnano Technology Company, with a diameter of 10-25nm; graphene nanoparticles are selected. XG Sciences' Grade C has a surface area of 500 m2 / g. The surface area of the graphene nanoparticles is greater than 150 m2 / g. 2 / g; More preferably, greater than 200m 2 The thickness of the graphene nanoparticles is 1-100 nanometers and the width is 0.5-100 micrometers. More preferably, the thickness of the graphene is 1-20 nanometers and the width is 1-50 micrometers.

[0030] In a preferred embodiment of the present invention, the raw materials of the antistatic polyethylene masterbatch further include an initiator.

[0031] Based on the total weight of the masterbatch raw materials as 100%, the amount of the initiator used is 0.01-0.5wt%, preferably 0.1-0.2wt%. The initiator is a free radical initiator, preferably at least one of dicumyl peroxide, benzoyl peroxide, tert-butyl benzoyl peroxide, and methyl ethyl ketone peroxide.

[0032] A second object of the present invention is to provide a method for preparing an antistatic polyethylene masterbatch containing an organic ionic liquid.

[0033] The method comprises:

[0034] The components are mixed according to the weight parts to obtain the antistatic polyethylene masterbatch.

[0035] A third object of the present invention is to provide an antistatic polyethylene pipe using an antistatic polyethylene masterbatch containing an organic ionic liquid.

[0036] The antistatic polyethylene pipe mixed material is prepared by mixing and extruding the antistatic polyethylene masterbatch, high-density polyethylene and an antioxidant.

[0037] Preferably,

[0038] Taking the total weight of the pipe mix as 100wt%, the weight percentage of each component is:

[0039] Polyethylene 20-99wt%;

[0040] Antistatic polyethylene masterbatch 0.7-79.7wt%;

[0041] Antioxidant 0.3wt%.

[0042] The preferred dosage of each component is:

[0043] Polyethylene 34.7-85wt%;

[0044] Antistatic polyethylene masterbatch 14.7-65wt%;

[0045] Antioxidant 0.3wt%.

[0046] The antioxidant may be a common antioxidant in the art, and the amount of the antioxidant used is also a conventional amount, which can be determined by technicians based on actual conditions.

[0047] The surface resistance or volume resistance of the antistatic polyethylene pipe is not higher than 10 5 Ω, more preferably, the surface resistance or volume resistance is not higher than 10 3 Ω.

[0048] The beneficial effects of the present invention are:

[0049] Ionic liquids interact strongly with the surfaces of conductive carriers such as carbon black, carbon nanotubes, and graphene, improving their dispersion in polyethylene. Ionic liquids are also conductive, significantly lowering the percolation threshold for conductivity. Furthermore, their low viscosity acts like a plasticizer, enhancing the system's flexibility.

[0050] The surface resistance or volume resistance of the HDPE pipe prepared by the masterbatch of the present invention is not higher than 10 5 Ω, further preferably the surface resistance or volume resistance is not higher than 10 3 Ω. And, it has excellent flexibility. DETAILED DESCRIPTION

[0051] The present invention will be described in detail below with reference to specific embodiments. It is necessary to point out that the following embodiments are only used to further illustrate the present invention and are not to be construed as limiting the scope of protection of the present invention. Non-essential improvements and adjustments made by those skilled in the art to the present invention based on the contents of the present invention still fall within the scope of protection of the present invention.

[0052] The raw materials used in the examples are all commercially available products unless the preparation process is otherwise specified.

[0053] Example 1

[0054] Step 1: Preparation of a polyethylene masterbatch containing carbon black and an organic ionic liquid. An organic ionic liquid (1-butyl 3-methylimidazolium chloride, Sigma-Aldrich), a conductive filler (carbon black: CH85), and polyethylene (HDPE, TR480) were added to an internal mixer according to the following ratios. The mixture was mixed at 135°C for 3 minutes, followed by further mixing at 180°C for 8 minutes. 2 kg of a polyethylene masterbatch containing carbon black and an ionic liquid was obtained.

[0055] Polyethylene TR480 58.0wt%

[0056] Carbon black CH85 40.0wt%

[0057] Organic ionic liquid (1-butyl 3-methylimidazolium chloride) 2.0 wt%

[0058] Step 2: Preparation of polyethylene pipe compound: The polyethylene masterbatch from step 1, polyethylene (HDPE, TR480), and antioxidant (Irganox 1010, BASF) were further mixed in the following proportions using a twin extruder at 210°C and 300 rpm to prepare a pipe compound.

[0059] Polyethylene TR480 54.7wt%

[0060] The above polyolefin masterbatch 45.0wt%

[0061] Antioxidant 1010 0.3wt%

[0062] In the final mixed material, the content of carbon black is 18 wt %, and the content of organic ionic liquid (1-butyl 3-methylimidazolium chloride) is 0.9 wt %.

[0063] The resulting pipe mix was melt-mixed again using a single-screw extruder at 190°C and 100 rpm to produce: ① standard tensile bars (tested for tensile yield strength and nominal strain at break according to GB / T1040); ② standard impact bars (tested for 2 mm notched Charpy impact strength according to GB / Y1843); and ③ 2 mm thick plates (tested for surface resistivity and volume resistivity according to GB / T3048.16). The results are listed in Table 1 (Sample 1).

[0064] Example 2

[0065] The preparation method is the same as that of Example 1, except that the organic ionic liquid is replaced by 1-14-alkyl 3-methylimidazolium chloride (Alfa Chemistry).

[0066] In the final pipe mixed material, the content of carbon black is 18 wt %, and the content of organic ionic liquid (1-14 alkyl 3-methylimidazolium chloride) is 0.9 wt %.

[0067] The pipe mix performance results are listed in Table 1 (Sample 2).

[0068] Example 3

[0069] Step 1: Preparation of organic ionic liquid 1-22-alkyl 3-methylimidazolium hexafluorophosphate.

[0070] 20 g of 1-methylimidazole (Sigma-Aldrich) and 107 g of 1-bromodocosane (Sigma-Aldrich) were dissolved in 200 ml of acetonitrile (Sigma-Aldrich). The mixture was refluxed at 85°C for 24 hours and then cooled to room temperature. The resulting product was filtered and washed three times with diethyl ether. It was then dried in a vacuum oven to yield 1-docosanyl-3-methylimidazolium bromide. The yield was approximately 80%, and the resulting product had a melting point of approximately 83°C.

[0071] Approximately 20 g of 1-docosyl-3-methylimidazolium bromide was dispersed in 750 ml of water to form a suspension. Under constant stirring, 10 ml (0.07 mol) of aqueous hexafluorophosphoric acid (Sigma-Aldrich) was slowly added dropwise to the suspension. The mixture was stirred at room temperature for 24 hours. CHCl (Sigma-Aldrich) was then added to form a two-layer oil-water mixture. The aqueous layer was removed, the CHCl evaporated, and the resulting white solid was rinsed with water. The solid was dried in a vacuum oven to yield the final product: 1-docosyl-3-methylimidazolium hexafluorophosphate. The yield of this process was approximately 95%, and the resulting product had a melting point of approximately 90°C.

[0072] Step 2: Preparation of polyethylene masterbatch containing carbon black and organic ionic liquid.

[0073] Polyethylene TR480 58.0wt%

[0074] Carbon black CH85 40.0wt%

[0075] Organic ionic liquid (1-22-alkyl 3-methyl imidazolium hexafluorophosphate) 2.0 wt%

[0076] The preparation method is the same as that of Example 1. The preparation of the polyethylene pipe compound is the same as that of step 2 in Example 1.

[0077] In the final pipe mixed material, the content of carbon black is 18 wt %, and the content of organic ionic liquid (1-22 alkyl 3-methyl imidazolium hexafluorophosphate) is 0.9 wt %.

[0078] The pipe mix performance results are listed in Table 1 (Sample 3).

[0079] Example 4

[0080] The preparation method is the same as that of Example 3, except that the polyethylene masterbatch in step 2 is prepared according to the following ratio.

[0081] Polyethylene TR480 56.0wt%

[0082] Carbon black CH85 40.0wt%

[0083] Organic ionic liquid (1-22-alkyl 3-methyl imidazolium hexafluorophosphate) 4.0 wt%

[0084] In the final pipe mixture, the content of carbon black is 18 wt %, and the content of organic ionic liquid (1-22 alkyl 3-methyl imidazolium hexafluorophosphate) is 1.8 wt %.

[0085] The pipe mix performance results are listed in Table 1 (Sample 4).

[0086] Example 5

[0087] Step 1: Preparation of a polyethylene masterbatch containing carbon black and organic ionic liquid grafted modification. The organic ionic liquid 1-vinyl 3-methylimidazolium chloride (Sigma-Aldrich, 43961), polyethylene (HDPE, TR480), and a free radical initiator (dicumyl peroxide) were added to an internal mixer and mixed at 135°C for 1 minute, followed by further mixing at 180°C for 5 minutes. A conductive filler (carbon black, CH85) was added and mixed at 135°C for 5 minutes. 2 kg of this PE masterbatch was prepared.

[0088]

[0089] The preparation method of the pipe compound was the same as that of Example 1. In the final pipe compound, the carbon black content was 18 wt % and the organic ionic liquid (1-vinyl 3-methylimidazolium chloride) content was 0.9 wt %.

[0090] The pipe mix performance results are listed in Table 1 (Sample 5).

[0091] Example 6

[0092] Step 1: Preparation of a polyethylene masterbatch containing organic ionic liquid and carbon nanotubes. An organic ionic liquid (1-14-alkyl 3-methylimidazolium chloride, Alfa Chemistry), a conductive filler (carbon nanotubes (MWNTs), CNTs-C11, Shenzhen Defang Nanotechnology Co., Ltd.), and polyethylene (HDPE, TR480) were added to an internal mixer according to the following ratios. The mixture was mixed at 135°C for 3 minutes and then at 180°C for 8 minutes to obtain 2 kg of a polyethylene masterbatch containing carbon nanotubes and ionic liquid.

[0093] Polyethylene TR480 78.0wt%

[0094] Carbon nanoparticles CNTs-C11 20.0wt%

[0095] Organic ionic liquid (1-14-alkyl 3-methylimidazolium chloride) 2.0 wt%

[0096] Step 2: Preparation of polyethylene pipe compound: Prepare the pipe compound according to the following proportions, using the same preparation method as in Example 1.

[0097]

[0098] In the final pipe mixture, the content of carbon black is 12 wt %, the content of carbon nanotubes is 3 wt %, and the content of organic ionic liquid (1-14-alkyl 3-methylimidazolium chloride) is 0.9 wt %.

[0099] The pipe mix performance results are listed in Table 1 (Sample 6).

[0100] Example 7

[0101] Step 1: Preparation of a polyethylene masterbatch containing carbon nanotubes and organic ionic liquid grafted modified polyethylene masterbatch was prepared by grafting method according to the following ratio, and the preparation method was the same as that in Example 5.

[0102]

[0103] Step 2: Preparation of polyethylene pipe compound: Prepare the pipe compound according to the following proportions, using the same preparation method as in Example 1.

[0104]

[0105] In the final pipe mixed material, the content of carbon black is 12 wt %, the content of carbon nanotubes is 3 wt %, and the content of organic ionic liquid (1-vinyl 3-methylimidazolium chloride) is 0.9 wt %.

[0106] The pipe mix performance results are listed in Table 1 (Sample 7).

[0107] Example 8

[0108] The preparation method was the same as that of Example 6, except that the carbon nanotubes were replaced with graphene (Nano307, Asbury Inc.) of equal weight content.

[0109] In the final pipe mixed material, the carbon black content is 12wt%, the graphene content is 3wt%, and the organic ionic liquid (1-14-alkyl 3-methylimidazolium chloride) content is 0.9wt%.

[0110] The pipe mix performance results are listed in Table 1 (Sample 8).

[0111] Example 9

[0112] Step 1: Preparation of a polyethylene masterbatch containing an organic ionic liquid and carbon nanotubes. An organic ionic liquid (1-14-alkyl 3-methylimidazolium chloride, Alfa Chemistry), a conductive filler (graphene, Nano307, Asbury Inc.), and polyethylene (HDPE, TR480) were added to an internal mixer according to the following ratios. The mixture was mixed at 135°C for 3 minutes and then at 180°C for 8 minutes to obtain 2 kg of a polyethylene masterbatch containing carbon nanotubes and an ionic liquid.

[0113] Polyethylene TR480 78.0wt%

[0114] Graphene Nano307 20.0wt%

[0115] Organic ionic liquid (1-14-alkyl 3-methylimidazolium chloride) 2.0 wt%

[0116] Step 2: Preparation of polyethylene pipe compound: Prepare the pipe compound according to the following proportions, using the same preparation method as in Example 1.

[0117]

[0118] In the final pipe mixed material, the content of carbon black is 2 wt %, the content of carbon nanotubes is 3 wt %, and the content of organic ionic liquid (1-14 alkyl 3-methylimidazolium chloride) is 0.4 wt %.

[0119] The pipe mix performance results are listed in Table 1 (Sample 9).

[0120] Example 10

[0121] The preparation method is the same as that of Example 9, except that the pipe mixture is prepared according to the following ratio.

[0122]

[0123] In the final pipe mixture, the content of carbon black is 18 wt %, the content of carbon nanotubes is 3 wt %, and the content of organic ionic liquid (1-14-alkyl 3-methylimidazolium chloride) is 1.2 wt %.

[0124] The pipe mix performance results are listed in Table 1 (Sample 10).

[0125] Comparative Example 1

[0126] The preparation method is the same as that of Example 1. The difference is that the polyethylene masterbatch does not contain an organic ionic liquid. The polyethylene masterbatch is prepared according to the following ratio.

[0127] Polyethylene TR480 60.0wt%

[0128] Carbon black CH85 40.0wt%

[0129] The method for preparing the pipe material mixture is the same as that in Example 1, except that the pipe material mixture is prepared according to the following ratio.

[0130] Polyethylene TR480 62.2wt%

[0131] Comparative Example 1 Polyolefin masterbatch 37.5wt%

[0132] Antioxidant 1010 0.3wt%

[0133] The carbon black content in the final pipe compound is 15 wt%.

[0134] The performance results of the pipe mix are listed in Table 1 (Comparative Sample 1).

[0135] Comparative Example 2

[0136] The preparation method is the same as that of Comparative Example 1, except that the pipe mix is prepared according to the following ratio. Polyethylene TR480 54.7wt% Comparative Example 2 Polyolefin masterbatch 45.0wt% Antioxidant 1010 0.3wt%

[0137] The carbon black content in the final pipe compound is 18 wt%.

[0138] The performance results of the pipe mix are listed in Table 1 (Comparative Sample 2).

[0139] Comparative Example 3

[0140] The preparation method is the same as that of Example 6, except that no organic ionic liquid is contained.

[0141] The final pipe material mixture contained 12 wt % of carbon black and 3 wt % of carbon nanotubes. The performance results of the pipe material mixture are listed in Table 1 (Comparative Sample 3).

[0142] Comparative Example 4

[0143] The preparation method is the same as that of Example 8, except that no organic ionic liquid is contained.

[0144] The final pipe material mixture contained 12 wt % of carbon black and 3 wt % of graphene. The performance results of the pipe material mixture are listed in Table 1 (Comparative Sample 4).

[0145] The performance of the samples obtained was tested and the main formula results are listed in Table 1.

[0146]

[0147] The data in Table 1 demonstrates that adding a small amount of ionic liquid significantly increases the system's conductivity, while also increasing the material's nominal strain at break and impact strength, and improving flexibility. The order of optimal ionic liquids is A > B > C. Grafting ionic liquids onto polyethylene further enhances these properties. Adding carbon nanotubes or graphene to carbon black, combined with ionic liquids, significantly improves conductivity, while also increasing the material's nominal strain at break and impact strength, and improving flexibility.

Claims

1. An antistatic polyethylene masterbatch containing an organic ionic liquid, characterized in that The antistatic polyethylene masterbatch is obtained by mixing raw materials including the following components: Polyethylene, conductive fillers and organic ionic liquids; The organic ionic liquid is an organic liquid containing cations and anions; Taking the total weight of the masterbatch as 100%, the weight percentage of each component is: Polyethylene 35-95wt%; Conductive filler 0.1-60wt%; Organic ionic liquid 0.1-10wt%; The raw materials of the antistatic polyethylene masterbatch also include an initiator; Taking the total weight of the masterbatch raw materials as 100wt%, The amount of initiator is 0.01-0.5wt%; The organic ionic liquid contains a carbon-carbon double bond group.

2. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 1, characterized in that: Taking the total weight of the masterbatch raw materials as 100wt%, The amount of initiator used is 0.1-0.2 wt%.

3. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 1, characterized in that: Taking the total weight of the masterbatch as 100%, the weight percentage of each component is: Polyethylene 50-84wt%; Conductive filler 15-45wt%; Organic ionic liquid 1-5wt%.

4. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 1, characterized in that: The organic ionic liquid is at least one of imidazolium salt, pyridinium salt and pyrazolium salt.

5. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 4, characterized in that: The organic ionic liquid contains phosphorus anions and halogen anions.

6. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 5, characterized in that: The organic ionic liquid contains fluorine-containing phosphorus anions.

7. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 1, characterized in that: The carbon-carbon double bond group is at least one of vinyl and propenyl.

8. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 1, characterized in that: The conductive filler is at least one of carbon black, carbon nanotubes, and graphene nanoparticles.

9. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 8, characterized in that: The carbon black has a particle size of 5-50 nm and an oil absorption value of 100-500 ml / 100 g; The carbon nanotubes are at least one of single-walled carbon nanotubes and multi-walled carbon nanotubes.

10. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 1, characterized in that: The initiator is a free radical initiator.

11. The antistatic polyethylene masterbatch containing organic ionic liquid according to claim 10, characterized in that: The free radical initiator is at least one of dicumyl peroxide, benzoyl peroxide, tert-butyl benzoyl peroxide, and methyl ethyl ketone peroxide.

12. A method for preparing an antistatic polyethylene masterbatch containing an organic ionic liquid according to any one of claims 1 to 11, characterized in that The method comprises: The components are mixed according to the amounts to obtain the antistatic polyethylene masterbatch.

13. An antistatic polyethylene pipe made of the antistatic polyethylene masterbatch containing an organic ionic liquid according to any one of claims 1 to 11, characterized in that: The antistatic polyethylene pipe is prepared by mixing and extruding raw materials including the antistatic polyethylene masterbatch, high-density polyethylene and an antioxidant.

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