Polyethylene blow molding product anti-radiation color-changing material and preparation method and application thereof

Abstract

The invention provides a polyethylene blow-molded product anti-radiation color-changing material as well as a preparation method and application thereof, and belongs to the technical field of plastics. Comprising the following steps: S1, adding a surfactant into water, adding nano-montmorillonite, stirring for reaction, centrifuging, washing and drying to obtain intercalated nano-montmorillonite; s2, adding the intercalated nano-montmorillonite into the graphene oxide aqueous dispersion, and performing spray drying to obtain coated intercalated nano-montmorillonite; s3, uniformly mixing the coated intercalated nano montmorillonite and the zinc oxide nano powder to prepare a compound; s4, modifying the compound by a silane coupling agent with double bonds to prepare a modified compound; s5, polyethylene is heated and melted, the modified compound is added, mixing, extrusion and granulation are conducted under irradiation of an ultraviolet lamp, and the polyethylene blow molding product anti-radiation discoloration material is prepared and has the good mechanical property and the good anti-radiation effect and is not prone to discoloration, so that the durability and weather resistance of the material are improved, and wide application prospects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of plastics, and specifically relates to an anti-irradiation discoloration material for polyethylene blow-molded products, a preparation method thereof, and an application thereof. Background Art

[0002] Polyethylene is a thermoplastic resin obtained by polymerizing ethylene. It has the properties of softening when heated and hardening when cooled, and does not undergo chemical reactions, with high plasticity. Although the comprehensive use quality of polyethylene plastics is relatively good, with the continuous improvement of design and use requirements, most of the commercially available polyethylene plastics on the market can no longer meet people's requirements. Especially during long-term use, polyethylene plastics are prone to aging phenomena, which not only affect the appearance but also reduce the mechanical quality, and continuous improvement is needed.

[0003] The energy of irradiation can break the intermolecular chemical bonds in the blow-molded barrel material. After the chemical bonds are broken, the structure and properties of the material will change, resulting in aging phenomena such as weakened gloss, powdering, and fracture. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-irradiation discoloration material for polyethylene blow-molded products, a preparation method thereof, and an application thereof, which have good mechanical properties, good anti-radiation effects, are not easily discolored, thereby improving the durability and weather resistance of the material, and have broad application prospects.

[0005] The technical solution of the present invention is realized as follows: The present invention provides a preparation method for an anti-irradiation discoloration material for polyethylene blow-molded products, including the following steps: S1. Preparation of intercalated nanometer montmorillonite: Add a surfactant to water, add nanometer montmorillonite, stir and react, centrifuge, wash, and dry to obtain intercalated nanometer montmorillonite; S2. Coating with graphene oxide: Add the prepared intercalated nanometer montmorillonite to the graphene oxide aqueous dispersion, and spray-dry to obtain coated intercalated nanometer montmorillonite; S3. Preparation of the composite: Mix the coated intercalated nanometer montmorillonite and zinc oxide nanopowder evenly to obtain a composite; S4. Modification: Add the composite to ethanol, add a silane coupling agent with a double bond, heat and stir to react to obtain a modified composite; S5. Preparation of the anti-irradiation discoloration material for polyethylene blow-molded products: Heat and melt polyethylene, add the modified composite, mix under ultraviolet lamp irradiation, extrude, and pelletize to obtain the anti-irradiation discoloration material for polyethylene blow-molded products.

[0006] As a further improvement of the present invention, the surfactant described in step S1 is selected from at least one of sodium dodecylbenzenesulfonate, sodium dodecylsulfonate, and sodium dodecyl sulfate.

[0007] As a further improvement of the present invention, the mass ratio of the surfactant to the nano-montmorillonite in step S1 is 1-3:12-15, and the stirring reaction time is 1-3 h.

[0008] As a further improvement of the present invention, the solid-liquid ratio of the intercalated nano-montmorillonite to the graphene oxide aqueous dispersion in step S2 is 1:3-5 g / mL, and the concentration of the graphene oxide aqueous dispersion is 0.1-0.2 mg / mL.

[0009] As a further improvement of the present invention, the mass ratio of the coated intercalated nano-montmorillonite to the zinc oxide nano-powder in step S3 is 12-15:7-10.

[0010] As a further improvement of the present invention, the silane coupling agent with double bonds described in step S4 is selected from at least one of KH570, A151, and A171.

[0011] As a further improvement of the present invention, the mass ratio of the composite to the silane coupling agent with double bonds in step S4 is 10:2-3, the temperature of the heating and stirring reaction is 40-50 °C, and the time is 1-3 h.

[0012] As a further improvement of the present invention, the mass ratio of the polyethylene to the modified composite in step S5 is 100:5-8.

[0013] The present invention further protects a polyethylene blow-molded product anti-irradiation discoloration material prepared by the above preparation method.

[0014] The present invention further protects an application of the above polyethylene blow-molded product anti-irradiation discoloration material in the preparation of a blow-molded barrel for chemical reagents.

[0015] The present invention has the following beneficial effects: In the present invention, the surfactant is used to intercalate the nano-montmorillonite. The nano-particles have a large specific surface area and surface energy, can form an effective stress transfer path in the polyethylene matrix, and improve the mechanical properties and radiation resistance of the material. At the same time, the nano-particles can also act as free radical traps to capture the free radicals generated during irradiation, reduce the erosion of the polyethylene molecular chain by free radicals, and thus delay the aging process of the material.

[0016] Then, the intercalated montmorillonite is modified by coating with graphene oxide. Groups with special electronic structures such as aromatic rings can absorb or dissipate irradiation energy, enhancing the material's tolerance to irradiation. These groups can convert the energy generated by irradiation into heat energy or other harmless forms through their own electron transitions or vibrations, thereby reducing the destructive effect of irradiation on the polyethylene main chain.

[0017] It is compounded with nano-zinc oxide. On the one hand, nano-zinc oxide can improve the mechanical properties of polyethylene, and on the other hand, it can also absorb, emit, or scatter radiation, thereby reducing the effect of radiation on the polyethylene molecular chain and protecting the polyethylene material.

[0018] The prepared composite is modified with a silane coupling agent with double bonds, enabling it to link to the polyethylene molecular chain, reducing the agglomeration of nano-materials, and improving the mechanical properties of polyethylene.

[0019] The anti-irradiation color-changing material for polyethylene blow-molded products prepared by the present invention has good mechanical properties, good anti-radiation effects, is not easily discolored, thereby improving the durability and weather resistance of the material, and has broad application prospects. Specific embodiments

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Example 1

[0021] This example provides a preparation method for an anti-irradiation color-changing material for polyethylene blow-molded products, including the following steps: S1. Preparation of intercalated nano-montmorillonite: Add 1 g of sodium dodecylbenzenesulfonate to 200 mL of water, add 12 g of nano-montmorillonite, stir and react for 1 h, centrifuge, wash, and dry to obtain intercalated nano-montmorillonite; S2. Graphene oxide coating: Add 10 g of the prepared intercalated nano-montmorillonite to 30 mL of a 0.1 mg / mL graphene oxide aqueous dispersion, and spray-dry to obtain coated intercalated nano-montmorillonite; S3. Preparation of the composite: Mix 12 g of the coated intercalated nano-montmorillonite and 7 g of nano-zinc oxide powder evenly to obtain a composite; S4. Modification: Add 10 g of the composite to 200 mL of ethanol, add 2 g of a silane coupling agent A171 with double bonds, heat to 40 °C, stir and react for 1 h to obtain a modified composite; S5. Preparation of anti-irradiation discoloration material for polyethylene blow-molded products: Heat 100 g of polyethylene to melt, add 5 g of modified composite, knead for 20 min under ultraviolet lamp irradiation, extrude and granulate to obtain the anti-irradiation discoloration material for polyethylene blow-molded products. Example 2

[0022] This example provides a preparation method of an anti-irradiation discoloration material for polyethylene blow-molded products, including the following steps: S1. Preparation of intercalated nano-montmorillonite: Add 3 g of sodium dodecyl sulfonate to 200 mL of water, add 15 g of nano-montmorillonite, stir and react for 3 h, centrifuge, wash and dry to obtain intercalated nano-montmorillonite; S2. Coating with graphene oxide: Add 10 g of the prepared intercalated nano-montmorillonite to 50 mL of 0.2 mg / mL graphene oxide aqueous dispersion, spray dry to obtain coated intercalated nano-montmorillonite; S3. Preparation of composite: Mix 15 g of coated intercalated nano-montmorillonite and 10 g of zinc oxide nanopowder evenly to obtain a composite; S4. Modification: Add 10 g of the composite to 200 mL of ethanol, add 3 g of silane coupling agent A151 with double bonds, heat to 50 °C, stir and react for 3 h to obtain a modified composite; S5. Preparation of anti-irradiation discoloration material for polyethylene blow-molded products: Heat 100 g of polyethylene to melt, add 8 g of modified composite, knead for 20 min under ultraviolet lamp irradiation, extrude and granulate to obtain the anti-irradiation discoloration material for polyethylene blow-molded products. Example 3

[0023] This example provides a preparation method of an anti-irradiation discoloration material for polyethylene blow-molded products, including the following steps: S1. Preparation of intercalated nano-montmorillonite: Add 2 g of sodium dodecyl sulfate to 200 mL of water, add 13 g of nano-montmorillonite, stir and react for 2 h, centrifuge, wash and dry to obtain intercalated nano-montmorillonite; S2. Coating with graphene oxide: Add 10 g of the prepared intercalated nano-montmorillonite to 40 mL of 0.15 mg / mL graphene oxide aqueous dispersion, spray dry to obtain coated intercalated nano-montmorillonite; S3. Preparation of composite: Mix 13 g of coated intercalated nano-montmorillonite and 8 g of zinc oxide nanopowder evenly to obtain a composite; S4. Modification: Add 10 g of the composite to 200 mL of ethanol, add 2.5 g of silane coupling agent KH570 with double bonds, heat to 45 °C, stir and react for 2 h to obtain a modified composite; S5. Preparation of anti-irradiation discoloration material for polyethylene blow molding products: Heat 100 g of polyethylene to melt, add 6 g of modified composite, knead for 20 min under ultraviolet lamp irradiation, extrude, and granulate to obtain the anti-irradiation discoloration material for polyethylene blow molding products.

[0024] Comparative Example 1 Compared with Example 3, the difference is that step S1 is not carried out.

[0025] Specifically as follows: S1. Graphene oxide coating: Add 10 g of the prepared nano-montmorillonite to 40 mL of graphene oxide aqueous dispersion with a concentration of 0.15 mg / mL, and spray dry to obtain coated nano-montmorillonite; S2. Preparation of composite: Mix 13 g of coated nano-montmorillonite and 8 g of zinc oxide nano-powder evenly to obtain a composite; S3. Modification: Add 10 g of the composite to 200 mL of ethanol, add 2.5 g of silane coupling agent KH570 with double bonds, heat to 45 °C, and stir and react for 2 h to obtain a modified composite; S4. Preparation of anti-irradiation discoloration material for polyethylene blow molding products: Heat 100 g of polyethylene to melt, add 6 g of modified composite, knead for 20 min under ultraviolet lamp irradiation, extrude, and granulate to obtain the anti-irradiation discoloration material for polyethylene blow molding products.

[0026] Comparative Example 2 Compared with Example 3, the difference is that step S2 is not carried out.

[0027] Specifically as follows: S1. Preparation of intercalated nano-montmorillonite: Add 2 g of sodium dodecyl sulfate to 200 mL of water, add 13 g of nano-montmorillonite, stir and react for 2 h, centrifuge, wash, and dry to obtain intercalated nano-montmorillonite; S2. Preparation of composite: Mix 13 g of intercalated nano-montmorillonite and 8 g of zinc oxide nano-powder evenly to obtain a composite; S3. Modification: Add 10 g of the composite to 200 mL of ethanol, add 2.5 g of silane coupling agent KH570 with double bonds, heat to 45 °C, and stir and react for 2 h to obtain a modified composite; S4. Preparation of anti-irradiation discoloration material for polyethylene blow molding products: Heat 100 g of polyethylene to melt, add 6 g of modified composite, knead for 20 min under ultraviolet lamp irradiation, extrude, and granulate to obtain the anti-irradiation discoloration material for polyethylene blow molding products.

[0028] Comparative Example 3 Compared with Example 3, the difference is that step S3 is not carried out.

[0029] Details are as follows: S1. Preparation of intercalated nanoclay: Add 2 g of sodium dodecyl sulfate to 200 mL of water, add 13 g of nanoclay, stir and react for 2 h, centrifuge, wash, and dry to obtain intercalated nanoclay; S2. Graphene oxide coating: Add 10 g of the prepared intercalated nanoclay to 40 mL of a 0.15 mg / mL graphene oxide aqueous dispersion, and spray dry to obtain coated intercalated nanoclay; S3. Modification: Add 10 g of the coated intercalated nanoclay to 200 mL of ethanol, add 2.5 g of the silane coupling agent KH570 with double bonds, heat to 45 °C, stir and react for 2 h to obtain modified coated intercalated nanoclay; S4. Preparation of anti-irradiation discoloration material for polyethylene blow-molded products: Heat 100 g of polyethylene to melt, add 6 g of the modified coated intercalated nanoclay, knead under ultraviolet lamp irradiation for 20 min, extrude, and granulate to obtain the anti-irradiation discoloration material for polyethylene blow-molded products.

[0030] Comparative Example 4 Compared with Example 3, the difference is that step S4 is not carried out.

[0031] Details are as follows: S1. Preparation of intercalated nanoclay: Add 2 g of sodium dodecyl sulfate to 200 mL of water, add 13 g of nanoclay, stir and react for 2 h, centrifuge, wash, and dry to obtain intercalated nanoclay; S2. Graphene oxide coating: Add 10 g of the prepared intercalated nanoclay to 40 mL of a 0.15 mg / mL graphene oxide aqueous dispersion, and spray dry to obtain coated intercalated nanoclay; S3. Preparation of composite: Mix 13 g of the coated intercalated nanoclay and 8 g of zinc oxide nanopowder evenly to obtain a composite; S4. Preparation of anti-irradiation discoloration material for polyethylene blow-molded products: Heat 100 g of polyethylene to melt, add 6 g of the composite, knead under ultraviolet lamp irradiation for 20 min, extrude, and granulate to obtain the anti-irradiation discoloration material for polyethylene blow-molded products.

[0032] Test Example 1 Perform performance tests on the anti-irradiation discoloration materials for polyethylene blow-molded products prepared in Examples 1-3 and Comparative Examples 1-4 of the present invention, and the results are shown in Table 1.

[0033] Table 1

[0034] As can be seen from the above table, the anti-irradiation discoloration materials of the polyethylene blow molded products prepared in Examples 1-3 of the present invention have good mechanical properties and aging resistance.

[0035] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A preparation method of an anti-irradiation discoloration material for polyethylene blow molding products, characterized in that, It includes the following steps: S1. Preparation of intercalated nanometer montmorillonite: Add a surfactant into water, add nanometer montmorillonite, stir and react, centrifuge, wash, and dry to obtain intercalated nanometer montmorillonite; S2. Coating with graphene oxide: Add the obtained intercalated nanometer montmorillonite into the graphene oxide aqueous dispersion, and spray dry to obtain coated intercalated nanometer montmorillonite; S3. Preparation of the composite: Mix the coated intercalated nanometer montmorillonite and zinc oxide nanopowder evenly to obtain the composite; S4. Modification: Add the composite into ethanol, add a silane coupling agent with a double bond, heat and stir to react to obtain a modified composite; S5. Preparation of the anti-irradiation discoloration material for polyethylene blow-molded products: Heat and melt polyethylene, add the modified composite, knead under ultraviolet lamp irradiation, extrude, and granulate to obtain the anti-irradiation discoloration material for polyethylene blow-molded products.

2. The preparation method according to claim 1, characterized in that, The surfactant described in step S1 is selected from at least one of sodium dodecylbenzenesulfonate, sodium dodecylsulfonate, and sodium dodecyl sulfate.

3. The preparation method according to claim 1, characterized in that, The mass ratio of the surfactant to the nanometer montmorillonite in step S1 is 1-3:12-15, and the stirring reaction time is 1-3 h.

4. The preparation method according to claim 1, wherein The solid-liquid ratio of the intercalated nanometer montmorillonite to the graphene oxide aqueous dispersion in step S2 is 1:3-5 g / mL, and the concentration of the graphene oxide aqueous dispersion is 0.1-0.2 mg / mL.

5. The preparation method according to claim 1, characterized in that, The mass ratio of the coated intercalated nanometer montmorillonite to the zinc oxide nanopowder in step S3 is 12-15:7-10.

6. The preparation method according to claim 1, characterized in that, The silane coupling agent with a double bond described in step S4 is selected from at least one of KH570, A151, and A171.

7. The preparation method according to claim 1, characterized in that, The mass ratio of the composite to the silane coupling agent with a double bond in step S4 is 10:2-3, and the temperature of the heat and stir reaction is 40-50 °C, and the time is 1-3 h.

8. The preparation method according to claim 1, characterized in that, The mass ratio of the polyethylene to the modified composite in step S5 is 100:5-8.

9. An anti-irradiation discoloration material for polyethylene blow-molded products prepared by the preparation method according to any one of claims 1-8.

10. Application of the anti-irradiation discoloration material for polyethylene blow-molded products according to claim 9 in the preparation of blow-molded barrels for chemical reagents.

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