Degradable antibacterial plastic product and preparation method thereof

Abstract

The application discloses a degradable antibacterial plastic product and a preparation method thereof, and relates to the technical field of plastics. The high-strength plastic product is prepared through a double-layer plastic fusion technology. A copolymer with biodegradability is used for a surface layer, and a rigid modified copolymer is used for a plastic layer of a bottom layer to improve the overall mechanical properties. In addition, a composite natural antibacterial agent composed of pepper oil resin and tea extract is used to not only improve the applicability of the plastic product, but also enhance the mechanical properties of the surface layer structure through a crosslinking network. The composite antibacterial agent is environment-friendly and biodegradable, and can be decomposed by microorganisms after being discarded, and participates in natural carbon cycle.

Description

Technical Field

[0001] This invention relates to the field of plastics technology, specifically to a biodegradable antibacterial plastic product and its preparation method. Background Technology

[0002] It is reported that the average person worldwide consumes approximately 90 kg of synthetic polymers annually, most of which are non-biodegradable or non-recyclable. More than 270 million tons of plastic are produced globally each year, with 18 million tons ending up in the ocean, currently accumulating to 244,000 tons. Plastic has become a major ecological disaster. Although many products such as plastic bags and bottles are labeled "recyclable" or "biodegradable," in reality, the recycling rate of these plastic products is limited.

[0003] As plastic products are used more and more widely in human life and production, they have also caused a series of environmental problems: the plastic products currently in use are generally petroleum-based plastics. These plastics have low recycling rates and are difficult to degrade in nature or have long degradation cycles, which easily cause "white pollution" and cause a series of damages to the soil and environment, seriously damaging the ecological system.

[0004] In response to increasingly serious environmental problems, more and more researchers are exploring and developing green and environmentally friendly materials that can degrade in a short time. Biodegradable materials, due to their excellent degradability and environmental friendliness, have significant research value and broad market prospects. Summary of the Invention

[0005] The purpose of this invention is to provide a biodegradable antibacterial plastic product and its preparation method, so as to solve the problems existing in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a biodegradable antibacterial plastic product, comprising, by weight, 100-150 parts of copolymer, 70-95 parts of modified copolymer, 15-22 parts of polystyrene, 12-25 parts of composite natural antibacterial agent, and 6-20 parts of antioxidant.

[0007] The copolymer was prepared by polymerizing diallyl pyrocarbonate and 3-butene-1-amine in a mass ratio of 1-5:1-5.

[0008] The modified copolymer is prepared by plasma pretreatment of the copolymer, immersion in a grafted monomer solution, and ultraviolet irradiation treatment.

[0009] The compound natural antibacterial agent is made from pepper oleoresin, water-soluble starch, and tea extract.

[0010] Furthermore, the pepper oleoresin is produced by a supercritical method with a purity of 60%.

[0011] Furthermore, the polystyrene has a relative molecular mass of 3000 g / mol.

[0012] Furthermore, the copolymer is prepared by adding solvent, 3-butene-1-amine, and diallyl pyrocarbonate under high-purity nitrogen protection, heating to 50-70°C, adding an initiator, reacting for 2-3 hours, adding isopropanol to terminate the reaction, removing the solvent by rotary evaporation, and then drying at 60°C to constant weight to obtain the copolymer.

[0013] Furthermore, the solvent is butyl acetate.

[0014] Furthermore, the mass ratio of the solvent, 3-butene-1-amine, and initiator is 120–200: 25–33: 0.01.

[0015] Furthermore, the grafting monomer is 1-phenyl-2-propenyl-1-one.

[0016] Furthermore, the preparation method of the composite natural antibacterial agent is as follows: 60-85 parts by weight of pepper oleoresin are heated to 30-70°C, 6-10 parts by weight of oil-soluble emulsifier are added, and stirred until dissolved to obtain an oil phase; 60-80 parts by weight of water-soluble starch and 40-70 parts by weight of tea extract are added to 200-450 parts by weight of water and heated to 50-90°C, then 1-10 parts by weight of water-soluble emulsifier and 0.5-3 parts by weight of stabilizer are added to obtain an aqueous phase; the aqueous phase and oil phase are mixed, emulsified and homogenized under a pressure of 20MPa to 80MPa to form an emulsion with a particle size of 100nm to 2000nm, and spray-dried.

[0017] Furthermore, the antioxidant is prepared by mixing dilaurate thiodipropionate and gallic acid in a mass ratio of 4-7:10-15.

[0018] Furthermore, a method for preparing an antibacterial plastic product includes the following preparation steps:

[0019] (1) The copolymer, the composite natural antibacterial agent, and 1 / 2 mass of the antioxidant are mixed thoroughly in proportion to obtain the surface plastic powder;

[0020] (2) Mix the modified copolymer, polystyrene, and 1 / 2 mass of antioxidant thoroughly to obtain the bottom powder;

[0021] (3) Spread the bottom powder in the mold, cover it with an aramid fiber mesh cloth of the same area and a thickness of 0.1 to 1 mm, then spread the surface plastic powder, press and fuse, demold, and obtain antibacterial plastic products.

[0022] Furthermore, the pressure applied during the pressurized fusion is 3–35 MPa, and the fusion temperature is 160–220 °C.

[0023] Furthermore, the basis weight of the aramid fiber mesh is 80–100 g / m². 2 .

[0024] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0025] (1) This invention employs a double-layer plastic fusion bonding process, where the two layers are not mixed, to obtain a high-strength plastic product. The surface plastic uses a copolymer formed by polymerizing diallyl pyrocarbonate and 3-butene-1-amine as the base material. Aliphatic ester bonds are introduced into the main chain of the copolymer molecules, giving it biodegradability and endowing the biodegradable plastic with excellent degradability. The bottom plastic uses a rigid modified copolymer as the base material to form a reinforced plastic layer, improving the overall mechanical properties of the plastic. Furthermore, the modified copolymer uses 1-phenyl-2-propenyl-1-one grafted into the polypropylene molecular chain, introducing the oxidation-sensitive unit vinyl ketone. This allows the surface plastic to accelerate the degradation of polypropylene during composting or soil burial, thereby giving the overall plastic excellent degradability.

[0026] (2) This invention uses Sichuan pepper oleoresin as the oil phase and water-soluble starch and tea extract as the aqueous phase to emulsify and encapsulate a composite natural antibacterial agent. The addition of tea extract masks the pungent taste of Sichuan pepper oleoresin, improving the applicability of plastic products. The water-soluble starch and tea extract, as the encapsulation layer, have polar groups that can covalently bond with the copolymer to form a cross-linked network, inhibiting the relative slippage between copolymer molecular chains and imparting excellent mechanical properties to the surface structure. The composite natural antibacterial agent used in this invention is environmentally friendly; after being discarded, it can be decomposed into carbon dioxide and water by microorganisms in nature, and then absorbed and utilized by plants, participating in the carbon cycle, thus exhibiting biodegradability. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] To more clearly illustrate the method provided by the present invention, the following embodiments are provided in detail. The test methods for various indicators of the antibacterial plastic products produced in the following embodiments are as follows:

[0029] The antibacterial properties were tested in accordance with QB / T2591-2003 "Antibacterial Plastics - Test Methods for Antibacterial Properties and Antibacterial Effects" (film application method).

[0030] Tensile properties were tested according to GB / T1040.3-2006 using a universal testing machine at a test speed of 10 mm / min.

[0031] Degradation performance: Soil burial degradation: Cut a certain size of film, dry it thoroughly to constant weight (W0), mark it and bury it about 10cm below the ground surface. After 3 months, take it out, wash it with water and ethanol, dry it and weigh it (W1), calculate the weight loss rate, weight loss rate (%) = (W1-W0) / W0×100%; 5 test samples are taken, and the final result is the average value.

[0032] Example 1

[0033] A biodegradable antibacterial plastic product comprises, by weight, 100 parts copolymer, 70 parts modified copolymer, 15 parts polystyrene, 12 parts composite natural antibacterial agent, and 6 parts antioxidant; wherein the antioxidant is prepared by mixing dilaurate thiodipropionate and gallic acid in a mass ratio of 4:10.

[0034] The method for preparing the antibacterial plastic product is as follows:

[0035] (1) Under the protection of high-purity nitrogen, butyl acetate, 3-buten-1-amine, and diallyl pyrocarbonate were added, heated to 50°C, and n-butyllithium was added. After reacting for 2 hours, isopropanol was added to terminate the reaction. The solvent was removed by rotary evaporation, and then dried at 60°C to constant weight to obtain the copolymer. The mass ratio of butyl acetate, 3-buten-1-amine, initiator, and isopropanol was 120:25:0.01:0.5.

[0036] (2) The copolymer was subjected to plasma treatment. After evacuating to 100 Pa, argon gas was introduced at a flow rate of 20 cm⁻¹. 3 At a power of 20 kW, a voltage of 380 V, and a treatment time of 30 s, the treated copolymer was immersed in 5 wt% 1-phenyl-2-propenyl-1-one / cyclohexane and placed in a 60 ℃ water bath. Then, 0.001 times the mass of 1-phenyl-2-propenyl-1-one diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide was added for ultraviolet irradiation treatment at a wavelength of 300 nm, a power of 500 W, and a treatment time of 30 min. The ultraviolet-irradiated copolymer was then rinsed three times with deionized water and dried at 60 ℃ for 3 h to obtain the modified copolymer.

[0037] (3) Heat 60 parts by weight of pepper oleoresin to 50°C, add 6 parts by weight of phospholipid, stir until dissolved to obtain the oil phase; add 60 parts by weight of water-soluble starch and 40 parts by weight of tea extract to 200 parts by weight of water and heat to 50°C, then add 1 part by weight of sodium caseinate and 0.5 parts by weight of citric acid to obtain the aqueous phase; mix the aqueous phase and the oil phase, emulsify and homogenize under a pressure of 40 MPa to form an emulsion with a particle size of 250 nm, and dry the emulsion in a spray drying tower under the conditions of an inlet air temperature of 200°C and an outlet air temperature of 100°C to obtain a composite natural antibacterial agent;

[0038] (4) The copolymer, composite natural antibacterial agent, and 1 / 2 mass of antioxidant are mixed thoroughly in proportion to obtain surface plastic powder;

[0039] (5) Mix the modified copolymer, polystyrene, and 1 / 2 mass of antioxidant thoroughly to obtain the bottom powder;

[0040] (6) Spread the bottom powder in the mold, cover it with an aramid fiber mesh cloth of the same area and 0.5mm thickness, then spread the surface plastic powder, maintain the pressure at 10MPa, the melting temperature at 200℃, keep it warm for 2.5h, demold, and obtain antibacterial plastic products.

[0041] Example 2

[0042] A biodegradable antibacterial plastic product comprises, by weight, 125 parts copolymer, 85 parts modified copolymer, 18 parts polystyrene, 20 parts composite natural antibacterial agent, and 13 parts antioxidant; wherein the antioxidant is prepared by mixing dilaurate thiodipropionate and gallic acid in a mass ratio of 7:10.

[0043] The method for preparing the antibacterial plastic product is as follows:

[0044] (1) Under the protection of high-purity nitrogen, butyl acetate, 3-buten-1-amine, and diallyl pyrocarbonate were added, heated to 60°C, and n-butyllithium was added. After reacting for 3 hours, isopropanol was added to terminate the reaction. The solvent was removed by rotary evaporation, and then dried at 60°C to constant weight to obtain the copolymer. The mass ratio of butyl acetate, 3-buten-1-amine, initiator, and isopropanol was 160:30:0.01:0.5.

[0045] (2) The copolymer was subjected to plasma treatment. After evacuating to 150 Pa, argon gas was introduced at a flow rate of 30 cm³. 3At a power of 60 kW, a voltage of 380 V, and a treatment time of 65 s, the treated copolymer was immersed in 12 wt% 1-phenyl-2-propenyl-1-one / cyclohexane and placed in a 70 ℃ water bath. Then, 0.001 times the mass of 1-phenyl-2-propenyl-1-one diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide was added for ultraviolet irradiation treatment at a wavelength of 300 nm, a power of 500 W, and a treatment time of 45 min. The ultraviolet-irradiated copolymer was then rinsed three times with deionized water and dried at 60 ℃ for 3 h to obtain the modified copolymer.

[0046] (3) Heat 72 parts by weight of pepper oleoresin to 50°C, add 8 parts by weight of phospholipid, stir until dissolved to obtain the oil phase; add 70 parts by weight of water-soluble starch and 55 parts by weight of tea extract to 315 parts by weight of water and heat to 50°C, then add 6 parts by weight of sodium caseinate and 1.8 parts by weight of citric acid to obtain the aqueous phase; mix the aqueous phase and the oil phase, emulsify and homogenize under a pressure of 40 MPa to form an emulsion with a particle size of 250 nm, and dry the emulsion in a spray drying tower under the conditions of an inlet air temperature of 200°C and an outlet air temperature of 100°C to obtain a composite natural antibacterial agent;

[0047] (4) The copolymer, composite natural antibacterial agent, and 1 / 2 mass of antioxidant are mixed thoroughly in proportion to obtain surface plastic powder;

[0048] (5) Mix the modified copolymer, polystyrene, and 1 / 2 mass of antioxidant thoroughly to obtain the bottom powder;

[0049] (6) Spread the bottom powder in the mold, cover it with an aramid fiber mesh cloth of the same area and 0.5mm thickness, then spread the surface plastic powder, maintain the pressure at 10MPa, the melting temperature at 200℃, keep it warm for 2.5h, demold, and obtain antibacterial plastic products.

[0050] Example 3

[0051] A biodegradable antibacterial plastic product comprises, by weight, 150 parts copolymer, 95 parts modified copolymer, 22 parts polystyrene, 25 parts composite natural antibacterial agent, and 20 parts antioxidant; wherein the antioxidant is prepared by mixing dilaurate thiodipropionate and gallic acid in a mass ratio of 7:15.

[0052] The method for preparing the antibacterial plastic product is as follows:

[0053] (1) Under the protection of high-purity nitrogen, butyl acetate, 3-buten-1-amine, and diallyl pyrocarbonate were added, heated to 70°C, and n-butyllithium was added. After reacting for 3 hours, isopropanol was added to terminate the reaction. The solvent was removed by rotary evaporation, and then dried at 60°C to constant weight to obtain the copolymer. The mass ratio of butyl acetate, 3-buten-1-amine, initiator, and isopropanol was 200:33:0.01:0.5.

[0054] (2) The copolymer was subjected to plasma treatment. After evacuating to 200 Pa, argon gas was introduced at a flow rate of 40 cm³. 3 At a power of 100KW, a voltage of 380V, and a treatment time of 100s, the treated copolymer was immersed in 20wt% 1-phenyl-2-propenyl-1-one / cyclohexane and placed in an 80℃ water bath. Then, 0.001 times the mass of diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide was added, followed by ultraviolet irradiation treatment at a wavelength of 300nm, a power of 500W, and a treatment time of 50min. The ultraviolet-irradiated copolymer was then rinsed five times with deionized water and dried at 60℃ for 5h to obtain the modified copolymer.

[0055] (3) Heat 85 parts by weight of pepper oleoresin to 50°C, add 10 parts by weight of phospholipid, stir until dissolved to obtain the oil phase; add 80 parts by weight of water-soluble starch and 70 parts by weight of tea extract to 450 parts by weight of water and heat to 90°C, then add 10 parts by weight of sodium caseinate and 3 parts by weight of citric acid to obtain the aqueous phase; mix the aqueous phase and the oil phase, emulsify and homogenize under a pressure of 40 MPa to form an emulsion with a particle size of 250 nm, and dry the emulsion in a spray drying tower under the conditions of an inlet air temperature of 200°C and an outlet air temperature of 100°C to obtain a composite natural antibacterial agent;

[0056] (4) The copolymer, composite natural antibacterial agent, and 1 / 2 mass of antioxidant are mixed thoroughly in proportion to obtain surface plastic powder;

[0057] (5) Mix the modified copolymer, polystyrene, and 1 / 2 mass of antioxidant thoroughly to obtain the bottom powder;

[0058] (6) Spread the bottom powder in the mold, cover it with an aramid fiber mesh cloth of the same area and 0.5mm thickness, then spread the surface plastic powder, maintain the pressure at 10MPa, the melting temperature at 200℃, keep it warm for 2.5h, demold, and obtain antibacterial plastic products.

[0059] Comparative Example 1

[0060] The difference between Comparative Example 1 and Example 3 is that polyethylene is used instead of copolymer, while the other steps are the same as in Example 1.

[0061] Comparative Example 2

[0062] The difference between Comparative Example 2 and Example 3 is that ethylene-vinyl acetate copolymer is used instead of copolymer, while the other steps are the same as in Example 1.

[0063] Comparative Example 3

[0064] A biodegradable antibacterial plastic product comprises, by weight, 170 parts copolymer, 15 parts polystyrene, 12 parts composite natural antibacterial agent, and 6 parts antioxidant; wherein the antioxidant is prepared by mixing dilaurate thiodipropionate and gallic acid in a mass ratio of 4:10.

[0065] The method for preparing the antibacterial plastic product is as follows:

[0066] (1) Under the protection of high-purity nitrogen, butyl acetate, 3-buten-1-amine, and diallyl pyrocarbonate were added, heated to 50°C, and n-butyllithium was added. After reacting for 2 hours, isopropanol was added to terminate the reaction. The solvent was removed by rotary evaporation, and then dried at 60°C to constant weight to obtain the copolymer. The mass ratio of butyl acetate, 3-buten-1-amine, initiator, and isopropanol was 120:25:0.01:0.5.

[0067] (2) Heat 60 parts by weight of pepper oleoresin to 50°C, add 6 parts by weight of phospholipid, stir until dissolved to obtain the oil phase; add 60 parts by weight of water-soluble starch and 40 parts by weight of tea extract to 200 parts by weight of water and heat to 50°C, then add 1 part by weight of sodium caseinate and 0.5 parts by weight of citric acid to obtain the aqueous phase; mix the aqueous phase and the oil phase, emulsify and homogenize under a pressure of 40 MPa to form an emulsion with a particle size of 250 nm, and dry the emulsion in a spray drying tower under the conditions of an inlet air temperature of 200°C and an outlet air temperature of 100°C to obtain a composite natural antibacterial agent;

[0068] (3) 100 parts of copolymer, composite natural antibacterial agent and 1 / 2 mass of antioxidant are mixed thoroughly in proportion to obtain surface plastic powder;

[0069] (4) Mix 70 parts of copolymer, polystyrene and 1 / 2 mass of antioxidant thoroughly to obtain bottom powder;

[0070] (5) Spread the bottom powder in the mold, cover it with an aramid fiber mesh cloth of the same area and 0.5mm thickness, then spread the surface plastic powder, maintain the pressure at 10MPa, the melting temperature at 200℃, keep it warm for 2.5h, demold, and obtain antibacterial plastic products.

[0071] Comparative Example 4

[0072] A biodegradable antibacterial plastic product comprises, by weight, 100 parts copolymer, 70 parts modified copolymer, 15 parts polystyrene, 6 parts antioxidant, 5 parts Sichuan pepper oil resin, 5 parts tea extract, and 5 parts water-soluble starch; wherein the antioxidant is prepared by mixing dilaurate thiodipropionate and gallic acid in a mass ratio of 4:10.

[0073] The method for preparing the antibacterial plastic product is as follows:

[0074] (1) Under the protection of high-purity nitrogen, butyl acetate, 3-buten-1-amine, and diallyl pyrocarbonate were added, heated to 50°C, and n-butyllithium was added. After reacting for 2 hours, isopropanol was added to terminate the reaction. The solvent was removed by rotary evaporation, and then dried at 60°C to constant weight to obtain the copolymer. The mass ratio of butyl acetate, 3-buten-1-amine, initiator, and isopropanol was 120:25:0.01:0.5.

[0075] (2) The copolymer was subjected to plasma treatment. After evacuating to 100 Pa, argon gas was introduced at a flow rate of 20 cm⁻¹. 3 At a power of 20 kW, a voltage of 380 V, and a treatment time of 30 s, the treated copolymer was immersed in 5 wt% 1-phenyl-2-propenyl-1-one / cyclohexane and placed in a 60 ℃ water bath. Then, 0.001 times the mass of 1-phenyl-2-propenyl-1-one diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide was added for ultraviolet irradiation treatment at a wavelength of 300 nm, a power of 500 W, and a treatment time of 30 min. The ultraviolet-irradiated copolymer was then rinsed three times with deionized water and dried at 60 ℃ for 3 h to obtain the modified copolymer.

[0076] (3) The copolymer, composite natural antibacterial agent, 1 / 2 mass of antioxidant, pepper oil resin, water-soluble starch and tea extract are mixed evenly in proportion to obtain the surface plastic powder.

[0077] (4) Mix the modified copolymer, polystyrene, and 1 / 2 mass of antioxidant thoroughly to obtain the bottom powder;

[0078] (5) Spread the bottom powder in the mold, cover it with an aramid fiber mesh cloth of the same area and 0.5mm thickness, then spread the surface plastic powder, maintain the pressure at 10MPa, the melting temperature at 200℃, keep it warm for 2.5h, demold, and obtain antibacterial plastic products.

[0079] Comparative Example 5

[0080] A biodegradable antibacterial plastic product comprises, by weight, 100 parts copolymer, 70 parts modified copolymer, 15 parts polystyrene, 12 parts composite natural antibacterial agent, and 6 parts antioxidant; the antibacterial plastic product is obtained by melt extrusion of each component; the antioxidant is prepared by mixing dilaurate thiodipropionate and gallic acid in a mass ratio of 4:10.

[0081] Example of effect

[0082] Table 1 below shows the performance analysis results of the antibacterial plastic products of Examples 1 to 3 and Comparative Examples 1 to 5 of the present invention.

[0083] Table 1

[0084]

[0085]

[0086] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No markings in the claims should be construed as limiting the scope of the claims.

Claims

1. A degradable antibacterial plastic article, characterized by, The copolymer is 100-150 parts by weight, the modified copolymer is 70-95 parts by weight, the polystyrene is 15-22 parts by weight, the composite natural antibacterial agent is 12-25 parts by weight, and the antioxidant is 6-20 parts by weight. The copolymer is prepared by polymerization of diallyl pyrocarbonate and 3-buten-1-amine in a mass ratio of 1-5:1-5. The modified copolymer is 1-phenyl-2-propenyl-1-ketone grafted copolymerized polypropylene. The modified copolymer is prepared by soaking the copolymer after plasma pretreatment in a grafted monomer solution and ultraviolet irradiation treatment. The composite natural antibacterial agent is prepared from Zanthoxylum oil resin, water-soluble starch and tea extract. The preparation method of the composite natural antibacterial agent comprises the following steps: heating 60-85 parts by weight of Zanthoxylum oil resin to 30-70 DEG C, adding 6-10 parts by weight of oil-soluble emulsifier, stirring until dissolved to obtain an oil phase; adding 60-80 parts by weight of water-soluble starch and 40-70 parts by weight of tea extract into 200-450 parts by weight of water and heating to 50-90 DEG C, then adding 1-10 parts by weight of water-soluble emulsifier and 0.5-3 parts by weight of stabilizer to obtain an aqueous phase; mixing the aqueous phase and the oil phase, homogenizing and granulating the emulsion with a particle size of 100-2000 nm under a pressure of 20-80 MPa to obtain an emulsion, and spray drying.

2. The degradable antibacterial plastic article according to claim 1, characterized in that, The preparation method of the copolymer comprises the following steps: under the protection of high-purity nitrogen, adding a solvent, 3-buten-1-amine and diallyl pyrocarbonate, heating to 50-70 DEG C, adding an initiator, reacting for 2-3 hours, adding isopropyl alcohol to terminate the reaction, removing the solvent by rotary evaporation, and drying at 60 DEG C until the weight is constant to obtain the copolymer.

3. The degradable antibacterial plastic article according to claim 2, characterized in that, The solvent is butyl acetate.

4. The degradable antibacterial plastic article according to claim 2, wherein The mass ratio of the solvent, 3-buten-1-amine and initiator is 120-200:25-33:0.

01.

5. The degradable antibacterial plastic article according to claim 1, wherein The grafted monomer is 1-phenyl-2-propenyl-1-ketone.

6. The degradable antibacterial plastic article according to claim 1, wherein The antioxidant is prepared by mixing dilauryl thiodipropionate and gallic acid in a mass ratio of 4-7:10-15.

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