High-toughness and high-strength polyethylene color master batch and preparation method thereof

Abstract

The invention discloses a high-toughness and high-strength polyethylene color master batch and a preparation method thereof. The polyethylene color master batch is prepared from polyethylene resin, carbon quantum dots, a thermoplastic polyurethane elastomer, a compatilizer, an antioxidant, an antioxidant and a pigment according to a certain ratio. The preparation method of the polyethylene color master batch comprises the following steps: S1, uniformly mixing the polyethylene resin, the carbon quantum dots, the thermoplastic polyurethane elastomer, the compatilizer, the antioxidant, the lubricant and the pigment to obtain a mixed material; and S2, adding the mixed material into a twin-screw extruder, and carrying out extrusion granulation to obtain the high-toughness and high-strength polyethylene color master batch. The polyethylene color master batch has good mechanical properties, high temperature resistance and aging resistance, especially has good toughness and strength, and can effectively prolong the service life of the produced polyethylene pipe and reduce the production cost of the polyethylene pipe fitting.

Description

Technical Field

[0001] The invention relates to the technical field of polyethylene pipe fitting production, and in particular to a high-toughness and high-strength polyethylene masterbatch and a preparation method thereof. Background Art

[0002] Pipe fittings are a general term for parts in pipeline systems that play the role of connection, control, direction change, diversion, sealing, support, etc. At present, most of the buried pipelines used in municipal projects such as water supply and gas are made of polyethylene pipes, and a large number of pipe fittings are needed to connect these pipes. In order to ensure the safety of pipeline use, the performance requirements of pipe fittings are relatively high, especially the toughness and strength requirements of pipe fittings are relatively high.

[0003] In order to reduce costs and increase the strength of polyethylene pipe fittings, different amounts of fillers such as calcium carbonate and talcum powder are usually added, which results in a decrease in the impact toughness of the polyethylene pipe fittings produced, which makes the polyethylene pipe fittings easy to break and damage, seriously affecting the service life of the municipal polyethylene pipeline system. At the same time, the toughness of polyethylene pipe fittings is low, and the toughness of polyethylene pipe fittings is usually increased by increasing the thickness of polyethylene pipe fittings to ensure the long-term service life of polyethylene pipe fittings, which will increase the cost of polyethylene pipe fittings and is not conducive to the high-quality development of enterprises to reduce costs and increase efficiency. Summary of the invention

[0004] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a high-toughness and high-strength polyethylene masterbatch and a preparation method thereof. The polyethylene masterbatch has good mechanical properties, high temperature resistance and aging resistance, especially good toughness and strength, and can effectively improve the service life of the produced polyethylene pipe and reduce the production cost of polyethylene pipe fittings.

[0005] The technical solution adopted to achieve the above-mentioned purpose of the present invention is:

[0006] A high-toughness and high-strength polyethylene masterbatch is prepared from the following raw materials in parts by weight:

[0007]

[0008]

[0009] Further, the preparation method of the carbon quantum dots is as follows:

[0010] 1) crushing rice straw with a crusher, then washing the rice straw powder with anhydrous ethanol, and then drying;

[0011] 2) taking the dried rice straw powder and placing it into a muffle furnace, and calcining it in an air atmosphere at 400-500° C. for 60-90 min;

[0012] 3) The calcined solid is added to distilled water and subjected to ultrasonic vibration. The mixed solution after vibration is filtered through a filter membrane to obtain a carbon quantum dot solution, which is then dried to obtain the carbon quantum dots.

[0013] Furthermore, the compatibilizer is at least one of maleic anhydride grafted POE, maleic anhydride grafted PE and maleic anhydride grafted polypropylene.

[0014] Furthermore, the antioxidant is at least one of antioxidant 1010, antioxidant 168 and antioxidant 1076.

[0015] Furthermore, the lubricant is at least one of zinc stearate, fatty acid amide, polyethylene wax and silicone powder.

[0016] Furthermore, the pigment is at least one of titanium dioxide, pigment orange 13, ultramarine blue and carbon black.

[0017] A method for preparing high-toughness and high-strength polyethylene masterbatch comprises the following steps:

[0018] S1, uniformly mixing polyethylene resin, carbon quantum dots, thermoplastic polyurethane elastomer, compatibilizer, antioxidant, lubricant, and pigment to obtain a mixed material;

[0019] S2. Add the mixed material into a twin-screw extruder, extrude and granulate, and obtain the high-toughness and high-strength polyethylene masterbatch.

[0020] Furthermore, the processing temperature of the twin-screw extruder barrel is 170-190°C, wherein the temperature of zone 1 is 170-180°C, the temperature of zone 2 is 175-185°C, the temperature of zone 3 is 180-190°C, the temperature of zone 4 is 180-190°C, and the temperature of zone 5 is 170-180°C. Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0021] 1. The present invention uses carbon quantum dots and thermoplastic polyurethane elastomer to synergistically act on polyethylene resin, significantly improving the toughness of polyethylene masterbatch, making the prepared polyethylene pipes less prone to breakage, thereby increasing the life of polyolefin pipes. At the same time, due to the high toughness of polyethylene masterbatch, the thickness of the prepared polyolefin pipes can be appropriately reduced, thereby reducing the production cost of polyolefin pipes.

[0022] 2. Carbon quantum dots are added to the polyolefin masterbatch of the present invention, so that the prepared polyolefin pipe fittings have good anti-aging performance.

[0023] 3. The present invention uses carbon quantum dots prepared from agricultural waste rice straw as raw materials as toughening and reinforcing agents. The price of carbon quantum dots is low, thereby further reducing the preparation cost of polyolefin masterbatch. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to specific embodiments, but these embodiments are not to be interpreted as limiting the protection scope of the present invention in any sense.

[0025] The preparation method of the carbon quantum dots used in the following examples and comparative examples is as follows:

[0026] 1. Crush the rice straw with a crusher, then wash it three times with anhydrous ethanol, and then dry it;

[0027] 2. Place the straw powder obtained in step 1 into a muffle furnace and calcine it at 450° C. for 75 min in an air atmosphere;

[0028] 3. The calcined solid was added to distilled water, followed by ultrasonic vibration, and then filtered with a 0.22 μm filter membrane to obtain a carbon quantum dot solution, which was freeze-dried to obtain carbon quantum dots.

[0029] Example 1

[0030] A high-toughness and high-strength polyethylene masterbatch is prepared from the following raw materials in parts by weight:

[0031]

[0032] The preparation method of the above-mentioned high-toughness and high-strength polyethylene masterbatch is as follows:

[0033] 1. Evenly mix polyethylene resin, carbon quantum dots, thermoplastic polyurethane elastomer, maleic anhydride grafted PE, antioxidant 1010, antioxidant 168, zinc stearate, polyethylene wax and carbon black to obtain a mixed material;

[0034] 2. Add the mixed material into a twin-screw extruder, set the extruder current to 80A, set the temperature of the barrel zone 1 to 175°C, the temperature of the barrel zone 2 to 180°C, the temperature of the barrel zone 3 to 185°C, the temperature of the barrel zone 4 to 185°C, the temperature of the barrel zone 5 to 175°C, extrude and granulate to obtain the high-toughness and high-strength polyethylene masterbatch.

[0035] Example 2

[0036] A high-toughness and high-strength polyethylene masterbatch is prepared from the following raw materials in parts by weight:

[0037]

[0038] The preparation method of the high-toughness and high-strength polyethylene masterbatch in this embodiment is the same as that in Example 1.

[0039] Example 3

[0040] A high-toughness and high-strength polyethylene masterbatch is prepared from the following raw materials in parts by weight:

[0041]

[0042] The preparation method of the high-toughness and high-strength polyethylene masterbatch in this embodiment is the same as that in Example 1.

[0043] Comparative Example 1

[0044] A polyethylene masterbatch is prepared from the following raw materials in parts by weight:

[0045]

[0046] The preparation method of the polyethylene masterbatch in this comparative example is the same as that in Example 1.

[0047] Comparative Example 2

[0048] A polyethylene masterbatch is prepared from the following raw materials in parts by weight:

[0049]

[0050] The preparation method of the polyethylene masterbatch in this comparative example is the same as that in Example 1.

[0051] Comparative Example 3

[0052] A polyethylene masterbatch is prepared from the following raw materials in parts by weight:

[0053]

[0054]

[0055] The preparation method of the polyethylene masterbatch in this comparative example is the same as that in Example 1.

[0056] The impact strength, tensile strength and anti-aging properties of the polyethylene masterbatches prepared in Examples 1-3 and Comparative Examples 1-3 were tested, and the results are shown in the following table:

[0057]

Claims

1. A high-toughness and high-strength polyethylene masterbatch, characterized in that It is prepared from the following raw materials in parts by weight:

2. The high-toughness and high-strength polyethylene masterbatch according to claim 1, characterized in that The preparation method of the carbon quantum dots is as follows: 1) crushing rice straw with a crusher, then washing the rice straw powder with anhydrous ethanol, and then drying; 2) taking the dried rice straw powder and placing it into a muffle furnace, and calcining it in an air atmosphere at 400-500° C. for 60-90 min; 3) adding the calcined solid to distilled water and performing ultrasonic vibration, filtering the mixed solution after vibration with a filter membrane to obtain a carbon quantum dot solution, and drying to obtain the carbon quantum dots.

3. The high-toughness and high-strength polyethylene masterbatch according to claim 1, characterized in that: The compatibilizer is at least one of maleic anhydride grafted POE, maleic anhydride grafted PE and maleic anhydride grafted polypropylene.

4. The high-toughness and high-strength polyethylene masterbatch according to claim 1, characterized in that: The antioxidant is at least one of antioxidant 1010, antioxidant 168 and antioxidant 1076.

5. The high-toughness and high-strength polyethylene masterbatch according to claim 1, characterized in that: The lubricant is at least one of zinc stearate, fatty acid amide, polyethylene wax and silicone powder.

6. The high-toughness and high-strength polyethylene masterbatch according to claim 1, characterized in that: The pigment is at least one of titanium dioxide, pigment orange 13, ultramarine blue and carbon black.

7. A method for preparing the high-toughness and high-strength polyethylene masterbatch according to claim 1, characterized in that The steps include: S1, uniformly mixing polyethylene resin, carbon quantum dots, thermoplastic polyurethane elastomer, compatibilizer, antioxidant, lubricant, and pigment to obtain a mixed material; S2. Add the mixed material into a twin-screw extruder, extrude and granulate, and obtain the high-toughness and high-strength polyethylene masterbatch.

8. The method for preparing high-toughness and high-strength polyethylene masterbatch according to claim 7, characterized in that: The processing temperature of the twin-screw extruder barrel is 170-190°C, wherein the temperature of zone 1 is 170-180°C, the temperature of zone 2 is 175-185°C, the temperature of zone 3 is 180-190°C, the temperature of zone 4 is 180-190°C, and the temperature of zone 5 is 170-180°C.

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