Aging-resistant high-mechanical-property polyethylene material and preparation method and application thereof

Abstract

The application relates to an anti-aging high-mechanical-property polyethylene material and a preparation method and application thereof, raw materials of which include modified polyethylene 60-80 parts by weight, modified glass fiber 8-12 parts by weight and functional additives 3-7 parts by weight; raw materials of the modified polyethylene include polyethylene, sodium dioctyl succinate sulfonate, fatty alcohol polyoxyethylene ether, sorbitol and cashew oil modified phenolic resin. The modified polyethylene, the modified glass fiber and the functional additives are mixed to obtain the anti-aging high-mechanical-property polyethylene material.

Description

A high-mechanical-performance polyethylene material with aging resistance, its preparation method and application Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to an aging-resistant polyethylene material with high mechanical properties, its preparation method, and its applications. Background Technology

[0002] Polyethylene (PE) is a common thermoplastic polymer with a variety of excellent properties and is widely used in packaging, construction, electronics, automobiles and other fields.

[0003] Polyethylene is prone to oxidative degradation under high temperature, oxygen, and ultraviolet light, generating new functional groups such as hydroperoxides, carbonyl groups, and double bonds. This leads to molecular chain breakage and a decrease in molecular weight, resulting in a decline in tensile and impact resistance. Furthermore, with technological advancements, the performance requirements for polyethylene materials are constantly increasing. Polyethylene materials suffer from insufficient aging resistance and low mechanical properties, making them unable to meet the needs of various application scenarios. Summary of the Invention

[0004] Therefore, this paper provides a polyethylene material with high mechanical properties and resistance to aging, and its preparation method, to solve the above problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An aging-resistant polyethylene material with high mechanical properties, comprising, by weight, 60-80 parts modified polyethylene, 8-12 parts modified glass fiber, and 3-7 parts functional additives.

[0007] The raw materials for the modified polyethylene include polyethylene, sodium dioctyl succinate, fatty alcohol polyoxyethylene ether, sorbitol, and cashew oil modified phenolic resin.

[0008] Furthermore, the method for preparing the modified glass fiber is as follows:

[0009] (1) Silane coupling agent and graphene oxide are mixed and reacted in a solvent to obtain modified graphene oxide;

[0010] (2) The modified graphene oxide is dispersed in water to obtain a modified graphene oxide solution, glass fiber is added and mixed, and then dried to obtain modified glass fiber.

[0011] Furthermore, in step (1), the silane coupling agent and graphene oxide are mixed at a mass ratio of 1:0.25-0.3 and reacted at 90-100℃ for 6-8 hours, and the solvent is one of water, benzene, and toluene.

[0012] Furthermore, in step (2), the concentration of the modified graphene oxide solution is 1-1.5 mg / mL, the mass ratio of modified graphene oxide to glass fiber is 1:2-4, and the drying is carried out at 70-90℃ for 3-5 hours.

[0013] Furthermore, by weight, the raw materials for the modified polyethylene include 32-35 parts of polyethylene, 1-1.3 parts of sodium dioctyl succinate sulfonate, 1.5-2 parts of fatty alcohol polyoxyethylene ether, 2.5-3 parts of sorbitol, and 0.8-1 parts of cashew oil modified phenolic resin; the polyethylene includes high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.2-0.3.

[0014] Furthermore, the modified polyethylene is prepared by adding the raw material into a ball mill and ball milling at 650-750 r / min for 8-10 h.

[0015] Furthermore, the functional additive is at least one of antioxidants, lubricants, toughening agents, waterproofing agents, UV protectants, dispersants, stabilizers, and solubilizers.

[0016] Furthermore, the functional additives are 3,5-di-tert-butyl-4-hydroxybenzoic acid, catechol, zinc stearate, sodium silicate, and phenyl 2-hydroxy-4-methoxybenzoate in a mass ratio of 0.8:0.5:1:1.2:1.

[0017] Furthermore, at least one of the silane coupling agents KH602, KH550, KH560, and KH791 is used.

[0018] Furthermore, the method for preparing the aging-resistant, high-mechanical-performance polyethylene material includes the following steps:

[0019] S1: Mix modified polyethylene, modified glass fiber and functional additives to obtain a mixture;

[0020] S2: Add the mixture to a twin-screw extruder for granulation to obtain the finished product.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] This invention prepares modified polyethylene using polyethylene, sodium dioctyl succinate sulfonate, fatty alcohol polyoxyethylene ether, sorbitol, and cashew oil-modified phenolic resin. This improves the adhesion between polyethylene and glass fiber, thereby enhancing the performance of the finished product. By first modifying graphene oxide with a silane coupling agent, and then immersing glass fiber in the modified graphene oxide, the dispersion of glass fiber in the composite material is improved, interfacial compatibility is optimized, and the mechanical strength of the finished product is increased. The resulting modified polyethylene, modified glass fiber, and functional additives are then mixed to produce a high-mechanical-performance polyethylene material with aging resistance. Detailed Implementation

[0023] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0024] Unless otherwise specified, all other materials and reagents used in the examples are commercially available.

[0025] Cashew oil-modified phenolic resin was purchased from Shandong Shengquan Chemical Co., Ltd.

[0026] Example 1

[0027] 1. The preparation method of modified glass fiber is as follows:

[0028] (1) The silane coupling agent is composed of KH550 and KH560 in a mass ratio of 1:2. The silane coupling agent and graphene oxide are mixed in water in a mass ratio of 1:0.25 and reacted at 100°C for 6 hours. After the reaction is completed, the unreacted coupling agent is removed by washing with deionized water to obtain modified graphene oxide.

[0029] (2) The modified graphene oxide was dispersed in water to obtain a modified graphene oxide solution with a concentration of 1 mg / mL. Glass fiber was added according to the mass ratio of modified graphene oxide to glass fiber of 1:2. The mixture was stirred at 200 r / min for 20 min and dried at 70℃ for 3 h to obtain modified glass fiber with a diameter of 3 μm.

[0030] 2. Preparation method of modified polyethylene:

[0031] (1) Weigh out 32 parts of polyethylene, 1 part of sodium dioctyl succinate sulfonate, 1.5 parts of fatty alcohol polyoxyethylene ether, 2.5 parts of sorbitol and 0.8 parts of cashew oil modified phenolic resin by weight; the polyethylene is composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.2.

[0032] (2) Add the raw material into a ball mill and ball mill at 650 r / min for 8 hours. After ball milling, heat at 65℃ for 20 minutes to obtain modified polyethylene.

[0033] 3. Preparation method of aging-resistant polyethylene material with high mechanical properties:

[0034] (1) Weigh out 3,5-di-tert-butyl-4-hydroxybenzoic acid, catechol, zinc stearate, sodium silicate and phenyl 2-hydroxy-4-methoxybenzoate in a mass ratio of 0.8:0.5:1:1.2:1 to form functional additives. Weigh out 60 parts of modified polyethylene, 8 parts of modified glass fiber and 3 parts of functional additives by weight.

[0035] (2) Mix modified polyethylene, modified glass fiber and functional additives to obtain a mixture. Add the mixture to a twin-screw extruder for mixing, extrusion and granulation. The temperature of the extruder is 180°C to obtain the finished product.

[0036] Example 2

[0037] 1. The preparation method of modified glass fiber is as follows:

[0038] (1) The silane coupling agent is composed of KH550 and KH560 in a mass ratio of 1:2. The silane coupling agent and graphene oxide are mixed in water in a mass ratio of 1:0.3 and reacted at 100℃ for 8 hours. After the reaction is completed, the unreacted coupling agent is removed by washing with deionized water to obtain modified graphene oxide.

[0039] (2) The modified graphene oxide was dispersed in water to obtain a modified graphene oxide solution with a concentration of 1.5 mg / mL. Glass fiber was added according to the mass ratio of modified graphene oxide to glass fiber of 1:4. The mixture was stirred at 200 r / min for 20 min and dried at 90℃ for 5 h to obtain modified glass fiber with a diameter of 3 μm.

[0040] 2. Preparation method of modified polyethylene:

[0041] (1) Weigh out 35 parts of polyethylene, 1.3 parts of sodium dioctyl succinate sulfonate, 2 parts of fatty alcohol polyoxyethylene ether, 3 parts of sorbitol and 1 part of cashew oil modified phenolic resin by weight; the polyethylene is composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.3.

[0042] (2) Add the raw material to a ball mill and ball mill at 750 r / min for 10 h. After ball milling, heat at 65℃ for 20 min to obtain modified polyethylene.

[0043] 3. Preparation method of aging-resistant polyethylene material with high mechanical properties:

[0044] (1) Weigh out 3,5-di-tert-butyl-4-hydroxybenzoic acid, catechol, zinc stearate, sodium silicate and phenyl 2-hydroxy-4-methoxybenzoate in a mass ratio of 0.8:0.5:1:1.2:1 to form functional additives. Weigh out 80 parts of modified polyethylene, 12 parts of modified glass fiber and 7 parts of functional additives by weight.

[0045] (2) Mix modified polyethylene, modified glass fiber and functional additives to obtain a mixture. Add the mixture to a twin-screw extruder for mixing, extrusion and granulation. The temperature of the extruder is 180°C to obtain the finished product.

[0046] Example 3

[0047] 1. The preparation method of modified glass fiber is as follows:

[0048] (1) The silane coupling agent is composed of KH550 and KH560 in a mass ratio of 1:2. The silane coupling agent and graphene oxide are mixed in water in a mass ratio of 1:0.28 and reacted at 100°C for 7 hours. After the reaction is completed, the unreacted coupling agent is removed by washing with deionized water to obtain modified graphene oxide.

[0049] (2) The modified graphene oxide was dispersed in water to obtain a modified graphene oxide solution with a concentration of 1.3 mg / mL. Glass fiber was added according to the mass ratio of modified graphene oxide to glass fiber of 1:3. The mixture was stirred at 200 r / min for 20 min and dried at 80℃ for 4 h to obtain modified glass fiber with a diameter of 3 μm.

[0050] 2. Preparation method of modified polyethylene:

[0051] (1) Weigh out 34 parts of polyethylene, 1.2 parts of sodium dioctyl succinate sulfonate, 1.8 parts of fatty alcohol polyoxyethylene ether, 2.8 parts of sorbitol and 0.9 parts of cashew oil modified phenolic resin by weight; the polyethylene is composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0052] (2) Add the raw material into a ball mill and ball mill at 700 r / min for 9 h. After ball milling, heat at 65℃ for 20 min to obtain modified polyethylene.

[0053] 3. Preparation method of aging-resistant polyethylene material with high mechanical properties:

[0054] (1) Weigh out 3,5-di-tert-butyl-4-hydroxybenzoic acid, catechol, zinc stearate, sodium silicate and phenyl 2-hydroxy-4-methoxybenzoate in a mass ratio of 0.8:0.5:1:1.2:1 to form functional additives. Weigh out 72 parts of modified polyethylene, 10 parts of modified glass fiber and 5 parts of functional additives by weight.

[0055] (2) Mix modified polyethylene, modified glass fiber and functional additives to obtain a mixture. Add the mixture to a twin-screw extruder for mixing, extrusion and granulation. The temperature of the extruder is 180°C to obtain the finished product.

[0056] Comparative Example 1

[0057] Based on Example 3, the raw material ratio in step 3 is adjusted as follows:

[0058] 3. Preparation method of aging-resistant polyethylene material with high mechanical properties:

[0059] (1) Weigh out 3,5-di-tert-butyl-4-hydroxybenzoic acid, catechol, zinc stearate, sodium silicate and phenyl 2-hydroxy-4-methoxybenzoate in a mass ratio of 0.8:0.5:1:1.2:1 to form functional additives. Weigh out 60 parts of modified polyethylene, 18 parts of modified glass fiber and 5 parts of functional additives by weight.

[0060] (2) Mix modified polyethylene, modified glass fiber and functional additives to obtain a mixture. Add the mixture to a twin-screw extruder for mixing, extrusion and granulation. The temperature of the extruder is 180°C to obtain the finished product.

[0061] The remaining steps are the same as in Example 3.

[0062] Comparative Example 2

[0063] Based on Example 3, the raw material ratio in step 2 is adjusted as follows:

[0064] 2. Preparation method of modified polyethylene:

[0065] (1) Weigh out 34 parts of polyethylene, 1.2 parts of sodium dioctyl succinate sulfonate, 1.8 parts of fatty alcohol polyoxyethylene ether, 2.8 parts of sorbitol and 0.9 parts of cashew oil modified phenolic resin by weight; the polyethylene is composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:1.

[0066] (2) Add the raw material into a ball mill and ball mill at 700 r / min for 9 h. After ball milling, heat at 65℃ for 20 min to obtain modified polyethylene.

[0067] The remaining steps are the same as in Example 3.

[0068] Comparative Example 3

[0069] Based on Example 3, the raw material ratio in step 2 is adjusted as follows:

[0070] 2. Preparation method of modified polyethylene:

[0071] (1) Weigh out 34 parts of polyethylene, 3 parts of sodium dioctyl succinate sulfonate, 2 parts of fatty alcohol polyoxyethylene ether, 1 part of sorbitol and 1 part of cashew oil modified phenolic resin by weight; the polyethylene is composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0072] (2) Add the raw material into a ball mill and ball mill at 700 r / min for 9 h. After ball milling, heat at 65℃ for 20 min to obtain modified polyethylene.

[0073] The remaining steps are the same as in Example 3.

[0074] Comparative Example 4

[0075] Based on Example 3, the raw materials in step 2 are adjusted as follows:

[0076] 2. Preparation method of modified polyethylene:

[0077] (1) Weigh out 34 parts of polyethylene, 1.2 parts of sodium dioctyl succinate sulfonate, 1 part of polyethylene glycol 400 dilaurate, 2.8 parts of palmitic acid and 0.9 parts of cashew oil modified phenolic resin by weight; the polyethylene is composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0078] (2) Add the raw material into a ball mill and ball mill at 700 r / min for 9 h. After ball milling, heat at 65℃ for 20 min to obtain modified polyethylene.

[0079] The remaining steps are the same as in Example 3.

[0080] Comparative Example 5

[0081] Based on Example 3, the raw materials in step 2 are adjusted as follows:

[0082] 2. Preparation method of modified polyethylene:

[0083] (1) Weigh out 34 parts of polyethylene, 1.2 parts of sodium dioctyl succinate sulfonate, 1.8 parts of fatty alcohol polyoxyethylene ether, and 2.8 parts of sorbitol by weight; the polyethylene is composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0084] (2) Add the raw material into a ball mill and ball mill at 700 r / min for 9 h. After ball milling, heat at 65℃ for 20 min to obtain modified polyethylene.

[0085] The remaining steps are the same as in Example 3.

[0086] Experimental Example 1

[0087] The finished products obtained in Examples 1-3 and Comparative Examples 1-5 were added into a mold and placed in a flat vulcanizing machine. The mold was heated to 190°C at a rate of 10°C / min, held at that temperature for 8 minutes, and then pressurized to 10 MPa for 10 minutes. A polyethylene film with a thickness of 3 mm was obtained.

[0088] The tensile strength and elongation at break were tested according to the test methods in GB / T 1040-2006 "Determination of Tensile Properties of Plastics".

[0089]

[0090] Experimental results show that the polyethylene material prepared by this invention has good mechanical properties. In Comparative Example 1, the raw material ratio of the polyethylene material led to a decrease in the mechanical properties of the finished product. In this invention, glass fiber, as a reinforcing material, can significantly improve the mechanical strength of the polyethylene material. In Comparative Example 1, increasing the proportion of modified glass fiber weakens the interfacial bonding force between the glass fiber and the polyethylene matrix, resulting in uneven internal stress distribution, stress concentration points, and increased brittleness of the finished product. In Comparative Example 2, changing the composition of polyethylene, the reasonable ratio of high-density polyethylene and linear low-density polyethylene in this invention can improve the dispersibility of modified glass fiber, enhance the interfacial bonding force between polyethylene and glass fiber, and thus improve the mechanical properties of the finished product. In Comparative Example 3, changing the raw material ratio of modified polyethylene led to a decrease in the mechanical strength of the finished product. The reasonable raw material ratio of modified polyethylene in this invention can improve the interfacial bonding force between polyethylene and glass fiber, as well as the processing performance of the polyethylene material, resulting in a polyethylene material with good mechanical properties. In Comparative Examples 4 and 5, changing the raw material composition of modified polyethylene led to a decrease in the mechanical properties of the finished product. The modified polyethylene raw materials of this invention have a synergistic effect, which can improve the interfacial bonding force between polyethylene and glass fiber, as well as the processing performance of polyethylene materials, so that the resulting polyethylene materials have good mechanical properties.

[0091] Experimental Example 2

[0092] The polyethylene films prepared in Example 3 of Experimental Example 1 and Comparative Examples 1-5 were placed in a light intensity of 0.55 W / m. 2 In a xenon lamp aging test chamber at 340 nm, 60°C, and 50% humidity, water was sprayed for 10 minutes every 2 hours for 30 days. The tensile strength and elongation at break were then tested according to the method described in Example 1.

[0093]

[0094] Experimental results show that the polyethylene material prepared by this invention has good aging resistance.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An aging-resistant polyethylene material, characterized in that, By weight, the raw materials include 60-80 parts of modified polyethylene, 8-12 parts of modified glass fiber, and 3-7 parts of functional additives; by weight, the raw materials of the modified polyethylene include 32-35 parts of polyethylene, 1-1.3 parts of sodium dioctyl succinate sulfonate, 1.5-2 parts of fatty alcohol polyoxyethylene ether, 2.5-3 parts of sorbitol, and 0.8-1 parts of cashew oil modified phenolic resin; the polyethylene includes high-density polyethylene and linear low-density polyethylene with a mass ratio of 1:0.2-0.3; the preparation method of the modified glass fiber is as follows: (1) silane coupling agent and graphene oxide are mixed and reacted in a solvent to obtain modified graphene oxide; (2) the modified graphene oxide is dispersed in water to obtain a modified graphene oxide solution, glass fiber is added and mixed, the mass ratio of modified graphene oxide to glass fiber is 1:2-4, and dried to obtain modified glass fiber.

2. The aging-resistant polyethylene material as described in claim 1, characterized in that, (1) The silane coupling agent and graphene oxide are mixed at a mass ratio of 1:0.25-0.3 and reacted at 90-100℃ for 6-8h. The solvent is one of water, benzene, and toluene.

3. The aging-resistant polyethylene material as described in claim 1, characterized in that, (2) The concentration of the modified graphene oxide solution is 1-1.5 mg / mL, and the drying is carried out at 70-90℃ for 3-5 hours.

4. The aging-resistant polyethylene material as described in claim 1, characterized in that, The modified polyethylene is prepared by adding the raw material into a ball mill and ball milling at 650-750 r / min for 8-10 h.

5. The aging-resistant polyethylene material as described in claim 1, characterized in that, The functional additive is at least one of antioxidants, lubricants, toughening agents, waterproofing agents, UV protectants, dispersants, and solubilizers.

6. The aging-resistant polyethylene material as described in claim 2, characterized in that, The silane coupling agent is at least one of KH602, KH550, KH560, and KH791.

7. The method for preparing the aging-resistant polyethylene material according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Mix modified polyethylene, modified glass fiber and functional additives to obtain a mixture; S2: Add the mixture to a twin-screw extruder for granulation to obtain the finished product.

8. The application of the aging-resistant polyethylene material as described in any one of claims 1-6 in building materials.

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