Anti-aging polyethylene material with high mechanical property as well as preparation method and application of anti-aging polyethylene material

Abstract

The invention relates to an anti-aging polyethylene material with high mechanical property as well as a preparation method and application thereof, and the anti-aging polyethylene material comprises the following raw materials in parts by weight: 60-80 parts of modified polyethylene, 8-12 parts of modified glass fiber and 3-7 parts of a functional additive, the modified polyethylene is prepared from the following raw materials: polyethylene, dioctyl sodium sulfosuccinate, fatty alcohol-polyoxyethylene ether, sorbitol and cashew nut oil modified phenolic resin. According to the invention, the modified polyethylene, the modified glass fiber and the functional additive are mixed to prepare the anti-aging polyethylene material with high mechanical properties.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and specifically to an aging-resistant high-mechanical-performance polyethylene material and a preparation method and application thereof. Background Art

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

[0003] Polyethylene is susceptible to oxidative degradation reactions in high-temperature, oxygen- and ultraviolet-light environments, generating new groups such as hydroperoxides, carbonyl groups, and double bonds. This leads to molecular chain breakage and molecular weight reduction, resulting in decreased tensile and impact properties. Furthermore, with technological advancements, performance requirements for polyethylene materials are constantly increasing. However, polyethylene materials suffer from insufficient aging resistance and low mechanical properties, making them unsuitable for use in a variety of scenarios. Summary of the Invention

[0004] In view of this, an aging-resistant polyethylene material with high mechanical properties and a preparation method thereof are provided to solve the above problems.

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

[0006] An aging-resistant polyethylene material with high mechanical properties, the raw materials of which include 60-80 parts by weight of modified polyethylene, 8-12 parts of modified glass fiber, and 3-7 parts of functional additives;

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

[0008] Furthermore, the preparation method of the modified glass fiber is:

[0009] (1) mixing a silane coupling agent and graphene oxide in a solvent to react to obtain modified graphene oxide;

[0010] (2) dispersing the modified graphene oxide in water to obtain a modified graphene oxide solution, adding glass fiber to mix, and drying to obtain modified glass fiber.

[0011] Furthermore, in step (1), the silane coupling agent and graphene oxide are mixed in a mass ratio of 1:0.25-0.3, and reacted at 90-100° C. 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 performed at 70-90° C. for 3-5 hours.

[0013] Furthermore, 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 part of cashew oil-modified phenolic resin, and the polyethylene includes high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.2-0.3.

[0014] Furthermore, the preparation method of the modified polyethylene is: adding the raw materials into a ball mill and ball milling at 650-750 r / min for 8-10 hours.

[0015] Furthermore, the functional additive is at least one of an antioxidant, a lubricant, a toughening agent, a waterproofing agent, an anti-ultraviolet agent, a dispersant, a stabilizer, and a solubilizer.

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

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

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

[0019] S1: mixing modified polyethylene, modified glass fiber and functional additives to obtain a mixed material;

[0020] S2: The mixture is added to a twin-screw extruder for granulation to obtain a finished product.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention prepares modified polyethylene using polyethylene, sodium dioctyl sulfosuccinate, fatty alcohol polyoxyethylene ether, sorbitol, and cashew nut oil-modified phenolic resin, which can improve the bonding between polyethylene and glass fiber and thus enhance the performance of the finished product. Graphene oxide is first modified using a silane coupling agent, and then the glass fiber is immersed in the modified graphene oxide. This improves the dispersion of the glass fiber in the composite material, optimizes interfacial compatibility, and enhances the mechanical strength of the finished product. The prepared modified polyethylene, modified glass fiber, and functional additives are mixed to produce an aging-resistant polyethylene material with high mechanical properties. DETAILED DESCRIPTION

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

[0024] Unless otherwise specified, other materials and reagents used in the examples can be obtained from commercial sources.

[0025] Cashew nut 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:

[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 a mass ratio of 1:0.25 and added into water. The mixture is 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 a mass ratio of modified graphene oxide to glass fiber of 1:2. The mixture was stirred at 200 r / min for 20 minutes and dried at 70°C for 3 hours to obtain modified glass fiber with a diameter of 3 μm.

[0030] 2. Preparation method of modified polyethylene:

[0031] (1) According to weight, 32 parts of polyethylene, 1 part of sodium dioctyl sulfosuccinate, 1.5 parts of fatty alcohol polyoxyethylene ether, 2.5 parts of sorbitol and 0.8 parts of cashew nut oil modified phenolic resin were weighed; the polyethylene was composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.2.

[0032] (2) The raw materials were added into a ball mill and ball-milled at 650 r / min for 8 h. After the ball milling, they were heated at 65°C for 20 min to obtain modified polyethylene.

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

[0034] (1) Weigh 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 a functional additive. Weigh 60 parts of modified polyethylene, 8 parts of modified glass fiber, and 3 parts of the functional additive by weight.

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

[0036] Example 2

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

[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 a mass ratio of 1:0.3 and added into water. The mixture is reacted at 100°C 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 a mass ratio of modified graphene oxide to glass fiber of 1:4. The mixture was stirred at 200 r / min for 20 minutes and dried at 90°C for 5 hours to obtain modified glass fiber with a diameter of 3 μm.

[0040] 2. Preparation method of modified polyethylene:

[0041] (1) According to weight, 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 nut oil modified phenolic resin were weighed; the polyethylene was composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.3.

[0042] (2) The raw materials were added into a ball mill and ball-milled at 750 r / min for 10 h. After the ball milling, they were heated at 65°C for 20 min to obtain modified polyethylene.

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

[0044] (1) Weigh 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 a functional additive. Weigh 80 parts of modified polyethylene, 12 parts of modified glass fiber, and 7 parts of the functional additive by weight.

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

[0046] Example 3

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

[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 a mass ratio of 1:0.28 and added into water. The mixture is 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 a mass ratio of modified graphene oxide to glass fiber of 1:3. The mixture was stirred at 200 r / min for 20 minutes and dried at 80°C for 4 hours to obtain modified glass fiber with a diameter of 3 μm.

[0050] 2. Preparation method of modified polyethylene:

[0051] (1) According to weight, 34 parts of polyethylene, 1.2 parts of sodium dioctyl sulfosuccinate, 1.8 parts of fatty alcohol polyoxyethylene ether, 2.8 parts of sorbitol and 0.9 parts of cashew nut oil modified phenolic resin were weighed; the polyethylene was composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0052] (2) The raw materials were added into a ball mill and ball-milled at 700 r / min for 9 h. After the ball milling, the raw materials were heated at 65°C for 20 min to obtain modified polyethylene.

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

[0054] (1) Weigh 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 a functional additive. Weigh 72 parts of modified polyethylene, 10 parts of modified glass fiber, and 5 parts of the functional additive by weight.

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

[0056] Comparative Example 1

[0057] On the basis of Example 3, the raw material ratio in step 3 was adjusted as follows:

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

[0059] (1) Weigh 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 a functional additive. Weigh 60 parts of modified polyethylene, 18 parts of modified glass fiber, and 5 parts of the functional additive by weight.

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

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

[0062] Comparative Example 2

[0063] On the basis of Example 3, the raw material ratio in step 2 was adjusted to be:

[0064] 2. Preparation method of modified polyethylene:

[0065] (1) According to weight, 34 parts of polyethylene, 1.2 parts of sodium dioctyl sulfosuccinate, 1.8 parts of fatty alcohol polyoxyethylene ether, 2.8 parts of sorbitol and 0.9 parts of cashew nut oil modified phenolic resin were weighed; the polyethylene was composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:1.

[0066] (2) The raw materials were added into a ball mill and ball-milled at 700 r / min for 9 h. After the ball milling, the raw materials were heated at 65°C for 20 min to obtain modified polyethylene.

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

[0068] Comparative Example 3

[0069] On the basis of Example 3, the raw material ratio in step 2 was adjusted to be:

[0070] 2. Preparation method of modified polyethylene:

[0071] (1) According to weight, 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 nut oil modified phenolic resin were weighed; the polyethylene was composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0072] (2) The raw materials were added into a ball mill and ball-milled at 700 r / min for 9 h. After the ball milling, the raw materials were heated at 65°C for 20 min to obtain modified polyethylene.

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

[0074] Comparative Example 4

[0075] On the basis of Example 3, the raw materials in step 2 were adjusted to be:

[0076] 2. Preparation method of modified polyethylene:

[0077] (1) According to weight, 34 parts of polyethylene, 1.2 parts of sodium dioctyl sulfosuccinate, 1 part of polyethylene glycol 400 dilaurate, 2.8 parts of palmitic acid and 0.9 parts of cashew nut oil modified phenolic resin were weighed; the polyethylene was composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0078] (2) The raw materials were added into a ball mill and ball-milled at 700 r / min for 9 h. After the ball milling, the raw materials were heated at 65°C for 20 min to obtain modified polyethylene.

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

[0080] Comparative Example 5

[0081] On the basis of Example 3, the raw materials in step 2 were adjusted to be:

[0082] 2. Preparation method of modified polyethylene:

[0083] (1) According to weight, 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 were weighed; the polyethylene was composed of high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.25.

[0084] (2) The raw materials were added into a ball mill and ball-milled at 700 r / min for 9 h. After the ball milling, the raw materials were heated at 65°C for 20 min to obtain modified polyethylene.

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

[0086] Test Example 1

[0087] The finished products obtained in Examples 1-3 and Comparative Examples 1-5 were placed in a mold, heated to 190°C at 10°C / min in a flat-plate vulcanizer, kept at this temperature for 8 minutes, and pressurized to 10 MPa for 10 minutes to obtain a polyethylene film with a thickness of 3 mm.

[0088] The tensile strength and elongation at break were tested according to the test method in GBT1040-2006 “Determination of tensile properties of plastics”.

[0089]

[0090] The experimental results show that the polyethylene material prepared by the present invention has good mechanical properties. The raw material ratio of the polyethylene material in Comparative Example 1 leads to a decrease in the mechanical properties of the finished product. In the present invention, glass fiber is used as a reinforcing material, which can significantly improve the mechanical strength of the polyethylene material. In Comparative Example 1, the proportion of modified glass fiber is increased, and the interfacial bonding force between the glass fiber and the polyethylene matrix is ​​weakened, resulting in uneven internal stress distribution, forming stress concentration points, and at the same time, the brittleness of the finished product increases. In Comparative Example 2, the composition of the polyethylene is changed. The reasonable ratio of high-density polyethylene and linear low-density polyethylene in the present invention can improve the dispersibility of the 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, the raw material ratio of the modified polyethylene is changed, resulting in a decrease in the mechanical strength of the finished product. The reasonable ratio of the raw materials of the modified polyethylene in the present invention can improve the interfacial bonding force between polyethylene and glass fiber, as well as the processing performance of the polyethylene material, so that the prepared polyethylene material has good mechanical properties. In Comparative Examples 4 and 5, the composition of the modified polyethylene raw materials is changed, resulting in a decrease in the mechanical properties of the finished product. The modified polyethylene raw materials of the present invention work synergistically to improve the interface bonding force between polyethylene and glass fiber, as well as the processing performance of the polyethylene material, so that the prepared polyethylene material has good mechanical properties.

[0091] Test Example 2

[0092] The polyethylene films prepared in Example 3 and Comparative Examples 1-5 in Test Example 1 were placed in a room with a light intensity of 0.55 W / m 2 / nm (340nm); temperature 60℃; humidity 50%; xenon lamp aging test chamber, spray water for 10 minutes every 2 hours, test for 30 days. Take out and test tensile strength and elongation at break according to the test method of Test Example 1.

[0093]

[0094] Experimental results show that the polyethylene material prepared by the present 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 the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An aging-resistant high mechanical performance 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; The raw materials of the modified polyethylene include polyethylene, sodium dioctyl sulfosuccinate, fatty alcohol polyoxyethylene ether, sorbitol and cashew nut oil-modified phenolic resin.

2. The aging-resistant high mechanical performance polyethylene material according to claim 1, characterized in that: The preparation method of the modified glass fiber is: (1) mixing a silane coupling agent and graphene oxide in a solvent to react to obtain modified graphene oxide; (2) dispersing the modified graphene oxide in water to obtain a modified graphene oxide solution, adding glass fiber to mix, and drying to obtain modified glass fiber.

3. The aging-resistant high mechanical performance polyethylene material according to claim 2, characterized in that: In step (1), the silane coupling agent and graphene oxide are mixed in a mass ratio of 1:0.25-0.3, and reacted at 90-100° C. for 6-8 hours. The solvent is one of water, benzene, and toluene.

4. The aging-resistant high mechanical performance polyethylene material according to claim 2, characterized in that: 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 performed at 70-90° C. for 3-5 hours.

5. The aging-resistant high mechanical performance polyethylene material according to claim 1, characterized in that: 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 part of cashew oil-modified phenolic resin in parts by weight; the polyethylene includes high-density polyethylene and linear low-density polyethylene in a mass ratio of 1:0.2-0.

3.

6. The aging-resistant high mechanical performance polyethylene material according to claim 1, characterized in that: The preparation method of the modified polyethylene is as follows: adding raw materials into a ball mill, and ball milling at 650-750 r / min for 8-10 hours.

7. The aging-resistant high mechanical performance polyethylene material according to claim 1, characterized in that: The functional additive is at least one of an antioxidant, a lubricant, a toughening agent, a waterproofing agent, an anti-ultraviolet agent, a dispersant, a stabilizer, and a solubilizer.

8. The aging-resistant high mechanical performance polyethylene material according to claim 2, characterized in that: At least one of the silane coupling agents KH602, KH550, KH560, and KH791.

9. The method for preparing an aging-resistant polyethylene material with high mechanical properties according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: mixing modified polyethylene, modified glass fiber and functional additives to obtain a mixed material; S2: The mixture is added to a twin-screw extruder for granulation to obtain a finished product.

10. Use of the aging-resistant high mechanical property polyethylene material according to any one of claims 1 to 8 in building materials.

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