Slow-release antibacterial scale-inhibiting self-cleaning material

Abstract

The invention discloses a slow-release antibacterial scale-inhibiting self-cleaning material which comprises the following components in parts by weight: 65-80 parts of polyurethane resin, 10-15 parts of a slow-release antibacterial scale-inhibiting self-cleaning agent, 15-20 parts of a solvent, 0.1-2.0 parts of an adhesion promoter, 0.1-2.0 parts of a flatting agent and 0.1-0.2 part of a defoaming agent, the slow-release antibacterial scale-inhibiting self-cleaning agent is obtained by reacting an octa-amino POSS amine compound, an acrylamide compound and a cross-linking agent under the action of an activating agent. According to the invention, amino-containing POSS is prepared and modified to prepare a scale-inhibiting self-cleaning agent with a slow-release antibacterial effect, then a slow-release antibacterial scale-inhibiting self-cleaning material is prepared from the scale-inhibiting self-cleaning agent, and then the slow-release antibacterial scale-inhibiting self-cleaning material is applied to the surface of a polyolefin plastic packaging product to form a self-cleaning coating. The plastic packaging product can achieve the effects of slow release, antibiosis, scale inhibition and self-cleaning, and the problems that an existing plastic packaging product is prone to breeding bacteria, can hide dirt and is not easy to clean and the like are solved.

Description

Technical Field

[0001] This invention relates to the field of functional coatings technology, specifically to a slow-release antibacterial and scale-inhibiting self-cleaning material and a coating of the slow-release antibacterial and scale-inhibiting self-cleaning material. Background Technology

[0002] General-purpose plastics such as polyolefins have advantages such as good chemical stability, corrosion resistance, non-toxicity, and low cost, and are often used in the manufacture of food packaging products. However, these packaging products are prone to bacterial growth, dirt accumulation, and difficulty in cleaning, affecting daily use and even endangering people's health. In recent years, with the significant increase in people's environmental awareness and pursuit of health, the demand for materials with antibacterial, scale-inhibiting, and easy-to-clean functions has been growing. Therefore, there is an urgent need to develop a scale-inhibiting and self-cleaning material with slow-release antibacterial properties, and then apply it to the surface of polyolefin packaging products to give the packaging products slow-release antibacterial, scale-inhibiting, and self-cleaning effects.

[0003] Cage-like polysilsesquioxanes (POSS) are a class of "organic / inorganic" nanohybrid materials with a rigid cage-like structure and organic groups modified on a silica framework, prepared by the hydrolysis and condensation of siloxanes. A series of highly reactive amino-containing POSSes can be prepared using amino-containing siloxanes. Because the organic groups R at the Si vertices of POSSes have strong structural designability, this provides great potential and possibility for the preparation of high-performance POSSes. Summary of the Invention

[0004] The purpose of this invention is to develop a slow-release antibacterial, scale-inhibiting, and self-cleaning material, which aims to provide slow-release antibacterial, scale-inhibiting, and self-cleaning functions for the surface of plastic packaging products, thereby solving the problems of existing polyolefin plastic packaging products being prone to bacterial growth, dirt accumulation, and difficulty in cleaning.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: This invention provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: The mixture comprises 65-80 parts of polyurethane resin, 10-15 parts of slow-release antibacterial and scale-inhibiting self-cleaning agent, 15-20 parts of solvent, 0.1-2.0 parts of adhesion promoter, 0.1-2.0 parts of leveling agent, and 0.1-0.2 parts of defoamer; wherein the slow-release antibacterial and scale-inhibiting self-cleaning agent is obtained by reacting an octaaminoPOSS amine compound, an acrylamide compound, and a crosslinking agent under the action of an activator.

[0006] Furthermore, a slow-release antibacterial and scale-inhibiting self-cleaning material is provided: the polyurethane resin is a commercially available polyurethane resin with a molecular weight of 10,000 to 50,000; the solvent is selected from methanol or ethanol; and the adhesion promoter is maleic anhydride-grafted modified chlorinated polypropylene emulsion.

[0007] Specifically, the maleic anhydride-grafted modified chlorinated polypropylene emulsion can be prepared by phase inversion method, with a solid content of 25-35% and a particle size of 0.05-0.1μm.

[0008] Furthermore, a slow-release antibacterial and scale-inhibiting self-cleaning material: the leveling agent is selected from one or a combination of two of acrylic leveling agents and polysiloxane-polyether copolymers; the defoamer is selected from one or a combination of two of polyether defoamers and silicone defoamers.

[0009] Furthermore, a slow-release antibacterial and scale-inhibiting self-cleaning material: The preparation method of the slow-release antibacterial and scale-inhibiting self-cleaning agent includes the following steps: Preparation of S1 and octaamino POSS: The coupling agent was stirred and mixed with alcohol, and then acid was added dropwise to react. After a white precipitate appeared, stirring was stopped, the mixture was allowed to stand, filtered, and washed to obtain a white powdery octaaminoPOSS. Preparation of S2, octaaminoPOSS amine compounds: Octaamino POSS, a base catalyst, and an organic solvent are stirred and premixed, and then an epoxy group-containing compound is added to carry out an addition reaction to obtain an octaamino POSS amine compound. S3. Preparation of acrylamide compounds: Acrylate compounds are mixed with amino acids, and then a catalyst and excess alcohol solvent are added to carry out an addition reaction to obtain acrylamide compounds; S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: The acrylamide compound, crosslinking agent, and deionized water are mixed, and the system is adjusted to be acidic after ultrasonic treatment. Then, an activator is added and the mixture is stirred to obtain solution A. The octaamino POSS amine compound was mixed with deionized water to obtain solution B; Solution A and solution B were mixed and stirred at room temperature. After the reaction, the mixture was dialyzed with buffer solution and acidic deionized water (pH 4-5), and then freeze-dried to obtain a slow-release antibacterial and scale-inhibiting self-cleaning agent.

[0010] Specifically, this invention develops a slow-release antibacterial and scale-inhibiting self-cleaning agent by preparing amino-containing POSS and modifying it, then prepares it into a scale-inhibiting self-cleaning material with slow-release antibacterial effect, and then applies the material to the surface of polyolefin packaging products to achieve the effects of slow-release antibacterial, scale inhibition and self-cleaning.

[0011] Furthermore, a slow-release antibacterial and scale-inhibiting self-cleaning material: the coupling agent in step S1 is APTES, the alcohol is anhydrous methanol, and the acid is hydrochloric acid; the volume ratio of the coupling agent, alcohol, and acid is 1:(6-10):(1-2).

[0012] Furthermore, a slow-release antibacterial and scale-inhibiting self-cleaning material is provided: the mass ratio of the octaamino POSS to the epoxy group-containing compound in step S2 is 1:(1.1-1.2), the amount of the alkaline catalyst added is 0.3-0.7% of the total reactant mass, and the amount of the organic solvent added is 130-150% of the total reactant mass; The epoxy group-containing compound is selected from at least one of glycidyl ether, 1,4-butanediol diglycidyl ether, resorcinol diglycidyl ether, and ethylene glycol diglycidyl ether; the organic solvent is selected from at least one of tetrahydrofuran, chloroform, toluene, and acetone; and the alkaline catalyst is a DBU alkaline catalyst.

[0013] Specifically, the total reactants in step S2 refer to the total mass of octaamino POSS and the epoxy group-containing compound.

[0014] Furthermore, a slow-release antibacterial and scale-inhibiting self-cleaning material: the mass ratio of the acrylate compound to the basic amino acid in step S3 is (2-2.4):1, the amount of catalyst added is 0.1-0.3% of the total reactant mass, and the reaction time is 48-60 hours; The acrylate compound is selected from at least one of alkyl methacrylate, 2-aminoethyl methacrylate hydrochloride, methacryloylethyl sulfobetaine, and methacryloyloxyethyl phosphorylcholine; the basic amino acid is selected from at least one of histidine, arginine, and lysine; and the catalyst is selected from at least one of triethylamine, tetraethyl lead, and phenylphosphine.

[0015] Specifically, the total reactants in step S3 refer to the total mass of acrylate compounds and amino acids.

[0016] Furthermore, a slow-release antibacterial and scale-inhibiting self-cleaning material is provided: the mass ratio of the acrylamide compound, crosslinking agent, and activator in step S4 is (0.6-0.7):(0.4-0.5):(0.06-0.1); the mass concentration of solution A is 1.0-1.5% (i.e., the total mass concentration of acrylamide compound and crosslinking agent is 1.0-1.5%); the mass ratio of the octaaminobutosamine compound to deionized water is 1:(6-8); the crosslinking agent is 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), and the activator is EDC / NHS activator.

[0017] The present invention also provides a slow-release antibacterial and scale-inhibiting self-cleaning coating, which is formed by coating and curing the above-mentioned slow-release antibacterial and scale-inhibiting self-cleaning material.

[0018] A plastic packaging product, wherein the surface of the plastic packaging product is formed with the above-mentioned slow-release antibacterial, scale-inhibiting and self-cleaning coating, which can achieve the functions of slow-release antibacterial, scale inhibition and self-cleaning.

[0019] The beneficial effects of this invention are: The slow-release antibacterial and scale-inhibiting self-cleaning agent prepared by the present invention uses an epoxy group compound to modify the amine-based POSS, so that the POSS has reactive groups that can react with acrylamide compounds and crosslinking agents, thereby improving the dispersibility of POSS and thus improving the wear resistance and adhesion of the material. Thanks to the cage-like structure of POSS, substances with antibacterial and scale-inhibiting properties can be bound, thus playing a slow-release role.

[0020] In the preparation of the slow-release antibacterial and scale-inhibiting self-cleaning agent, this invention also involves reacting acrylates containing at least positive ions with amino acids to obtain acrylamide compounds, creating reaction sites for further reactions and helping to improve the antibacterial, water-resistant, and biocompatibility of the material (coating). Furthermore, by using the preferred crosslinking agent 2-phosphonobutane-1,2,4-tricarboxylic acid, the material contains carboxyl and phosphonic acid groups, enabling the material (coating) to achieve scale inhibition, calcium compatibility, and biodegradability.

[0021] The coating formed by this slow-release antibacterial and scale-inhibiting self-cleaning material is hydrophilic. When applied to the surface of packaged products, water droplets can roll off and remove surface dust and other impurities, thus achieving a self-cleaning effect. Furthermore, the raw materials used in this slow-release antibacterial and scale-inhibiting self-cleaning material are non-toxic, non-polluting, and have good water solubility, conforming to the principles of green and environmentally friendly practices. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] This embodiment 1 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 70 parts polyurethane resin, 10 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 20 parts solvent, 0.5 parts adhesion promoter, 1.0 part leveling agent, and 0.2 parts defoamer; Wherein, the solvent is ethanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is acrylic leveling agent, the defoamer is polyether defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The specific preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU and the organic solvent (tetrahydrofuran) were added to a flask and stirred for 0.5 hours for premixing (activation). Then, an epoxy group-containing compound (glycidyl ether) was added and stirred at room temperature for 1 hour to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to glycidyl ether is 1:1.1, the amount of DBU added is 0.5% of the total reactant mass of octaaminoPOSS and glycidyl ether, and the amount of organic solvent added is 130% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (composed of alkyl methacrylate and 2-aminoethyl methacrylate hydrochloride in a mass ratio of 1:1) was mixed with a basic amino acid (histidine) in a mass ratio of 2:1 in a reaction flask. Then, 0.1% of the total reactants (including the acrylate compound and the amino acid) of a catalyst (triethylamine) and excess ethanol solvent were added. The addition reaction was carried out at room temperature for 48 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 30 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 24 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.6:0.5:0.08, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.0 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 6 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 24 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 12 hours respectively, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0025] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 1 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0026] Example 2

[0027] This embodiment 2 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 80 parts polyurethane resin, 13 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 15 parts solvent, 1.0 part adhesion promoter, 1.0 part leveling agent, and 0.2 parts defoamer; Wherein, the solvent is methanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is polysiloxane-polyether copolymer leveling agent, the defoamer is organosilicon defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The specific preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU and the organic solvent (tetrahydrofuran) were added to a flask and stirred for premixing (activation) for 0.5 hours. Then, an epoxy group-containing compound (1,4-butanediol diglycidyl ether) was added and stirred at room temperature for 1 hour to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to 1,4-butanediol diglycidyl ether is 1:1.1, the amount of the base catalyst DBU added is 0.5% of the total reactant mass, and the amount of the organic solvent added is 130% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (composed of 2-aminoethyl methacrylate hydrochloride and methacryloyl ethyl sulfobetaine in a mass ratio of 1:1) was mixed with a basic amino acid (lysine) in a reaction flask in a mass ratio of 2.2:1. Then, 0.2% of the total reactants were added with a catalyst (triethylamine) and excess ethanol solvent. The addition reaction was carried out at room temperature for 60 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 30 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 24 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.7:0.4:0.06, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.5 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 8 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 24 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 12 hours respectively, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0028] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 2 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0029] Example 3

[0030] This embodiment 3 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 70 parts polyurethane resin, 15 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 15 parts solvent, 2.0 parts adhesion promoter, 0.5 parts leveling agent, and 0.2 parts defoamer; Wherein, the solvent is methanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is polysiloxane-polyether copolymer leveling agent, the defoamer is organosilicon defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The specific preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU and the organic solvent (tetrahydrofuran) were added to a flask and stirred for 1 hour for premixing (activation). Then, an epoxy group-containing compound (glycidyl ether) was added and stirred at room temperature for 1 hour to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to glycidyl ether is 1:1.1, the amount of DBU added as the base catalyst is 0.5% of the total reactant mass, and the amount of organic solvent added is 130% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (composed of methacryloylethyl sulfobetaine and methacryloyloxyethyl phosphorylcholine in a mass ratio of 1:1) was mixed with a basic amino acid (arginine) in a reaction flask in a mass ratio of 2.4:1. Then, 0.1% of a catalyst (phenylphosphine) and excess ethanol solvent were added to the total reactants. The addition reaction was carried out at room temperature for 56 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 20 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 16 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.6:0.4:0.07, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.2 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 7 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 20 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 8 hours, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0031] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 3 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0032] Example 4

[0033] This embodiment 4 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: The mixture contains 65 parts polyurethane resin, 15 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 20 parts solvent, 1.5 parts adhesion promoter, 2.0 parts leveling agent, and 0.1 parts defoamer. The solvent is methanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is acrylic leveling agent, the defoamer is polyether defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The specific preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU and the organic solvent (chloroform) were added to a flask and stirred for 1 hour for premixing (activation). Then, an epoxy group-containing compound (1,4-butanediol diglycidyl ether) was added and stirred at room temperature for 2 hours to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to 1,4-butanediol diglycidyl ether is 1:1.2, the amount of the base catalyst DBU added is 0.6% of the total reactant mass, and the amount of the organic solvent added is 150% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (composed of alkyl methacrylate and 2-aminoethyl methacrylate hydrochloride in a mass ratio of 1:1) was mixed with a basic amino acid (histidine) in a mass ratio of 2:1 in a reaction flask. Then, 0.2% of the total reactants were added with a catalyst (tetraethyl lead) and excess ethanol solvent. The addition reaction was carried out at room temperature for 48 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 30 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 20 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.7:0.5:0.08, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.3 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 6 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 16 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 10 hours respectively, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0034] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 4 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating can enable plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0035] Example 5

[0036] This embodiment 5 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: The mixture contains 69 parts polyurethane resin, 13 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 18 parts solvent, 1.0 part adhesion promoter, 2.0 parts leveling agent, and 0.2 parts defoamer. Wherein, the solvent is ethanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is acrylic leveling agent, the defoamer is polyether defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The specific preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU and the organic solvent (chloroform) were added to a flask and stirred for 1 hour for premixing (activation). Then, an epoxy group-containing compound (1,4-butanediol diglycidyl ether) was added and stirred at room temperature for 2 hours to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to 1,4-butanediol diglycidyl ether is 1:1.2, the amount of the base catalyst DBU added is 0.6% of the total reactant mass, and the amount of the organic solvent added is 150% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (alkyl methacrylate) and a basic amino acid (lysine) were mixed in a reaction flask at a mass ratio of 2.2:1. Then, 0.2% of the total reactants were added as a catalyst (triethylamine) and excess ethanol solvent. The addition reaction was carried out at room temperature for 60 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 30 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 18 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.6:0.5:0.06, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.1 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 6 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 12 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 10 hours, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0037] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 5 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0038] Example 6

[0039] This embodiment 6 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 75 parts polyurethane resin, 10 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 15 parts solvent, 2.0 parts adhesion promoter, 2.0 parts leveling agent, and 0.1 parts defoamer; Wherein, the solvent is methanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is polysiloxane-polyether copolymer leveling agent, the defoamer is organosilicon defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The specific preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU and the organic solvent (chloroform) were added to a flask and stirred for 1 hour for premixing (activation). Then, an epoxy group-containing compound (1,4-butanediol diglycidyl ether) was added and stirred at room temperature for 2 hours to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to 1,4-butanediol diglycidyl ether is 1:1.2, the amount of the base catalyst DBU added is 0.7% of the total reactant mass, and the amount of the organic solvent added is 140% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (methacryloylethyl sulfobetaine) and a basic amino acid (arginine) were mixed in a reaction flask at a mass ratio of 2.4:1. Then, 0.1% of the total reactants were added to a catalyst (phenylphosphine) and excess ethanol solvent. The addition reaction was carried out at room temperature for 50 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 30 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 22 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.6:0.5:0.06, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.4 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 7 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 16 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 12 hours respectively, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0040] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 6 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0041] Example 7

[0042] This embodiment 7 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 72 parts polyurethane resin, 13 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 15 parts solvent, 1.5 parts adhesion promoter, 1.5 parts leveling agent and 0.1 parts defoamer; Wherein, the solvent is methanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is polysiloxane-polyether copolymer leveling agent, the defoamer is polyether defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU and the organic solvent (toluene) were added to a flask and stirred for 1 hour for premixing (activation). Then, an epoxy group-containing compound (resorcinol diglycidyl ether) was added and stirred at room temperature for 1 hour to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to resorcinol diglycidyl ether is 1:1.2, the amount of the base catalyst DBU added is 0.5% of the total reactant mass, and the amount of the organic solvent added is 140% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (2-aminoethyl methacrylate hydrochloride) and a basic amino acid (arginine) were mixed in a reaction flask at a mass ratio of 2.0:1. Then, 0.1% of the total reactants were added as a catalyst (triethylamine) and excess ethanol solvent. The addition reaction was carried out at room temperature for 48 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 30 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 22 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.7:0.4:0.1, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.5 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 6 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 24 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 12 hours respectively, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0043] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 7 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0044] Example 8

[0045] This embodiment 8 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 70 parts polyurethane resin, 15 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 15 parts solvent, 2.0 parts adhesion promoter, 1.5 parts leveling agent and 0.1 parts defoamer; Wherein, the solvent is methanol, the adhesion promoter is maleic anhydride grafted modified chlorinated polypropylene emulsion, the leveling agent is polysiloxane-polyether copolymer leveling agent, the defoamer is polyether defoamer, and the slow-release antibacterial scale inhibitor self-cleaning agent is obtained by reacting octaamino POSS amine compound, acrylamide compound and crosslinking agent under the action of activator. The specific preparation process of the slow-release antibacterial scale inhibitor self-cleaning agent is the same as in Example 7.

[0046] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 8 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating can enable plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0047] Example 9

[0048] This embodiment 9 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 72 parts polyurethane resin, 10 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 18 parts ethanol solvent, 1.0 part adhesion promoter (maleic anhydride grafted modified chlorinated polypropylene emulsion), 2.0 parts polysiloxane-polyether copolymer leveling agent, and 0.2 parts silicone defoamer. The specific preparation process of the slow-release antibacterial scale inhibitor self-cleaning agent is the same as in Example 7.

[0049] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 9 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0050] Example 10

[0051] This embodiment 10 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 78 parts of polyurethane resin, 13 parts of slow-release antibacterial and scale-inhibiting self-cleaning agent, 15 parts of methanol solvent, 0.5 parts of adhesion promoter (maleic anhydride grafted modified chlorinated polypropylene emulsion), 2.0 parts of polysiloxane-polyether copolymer leveling agent, and 0.2 parts of organosilicon defoamer. The preparation process of the slow-release antibacterial and scale-inhibiting self-cleaning agent is as follows: Preparation of S1 and octaamino POSS: 30 ml of coupling agent (APTES) and 240 ml of anhydrous methanol were added to a 500 ml triple-flute flask and stirred (800 rpm). Then, 41 ml of hydrochloric acid was added dropwise to the flask to react (for 2 days) until a white precipitate appeared. Stirring was then stopped, and the mixture was allowed to stand for 5 days. After filtration, the product was washed with anhydrous methanol to obtain a white powdery product, octaaminoPOSS, with a yield of approximately 80%. Preparation of S2, octaaminoPOSS amine compounds: All the obtained octaamino POSS, the base catalyst DBU, and the organic solvent (toluene) were added to a flask and stirred for premixing (activation) for 0.5 hours. Then, an epoxy group-containing compound (ethylene glycol diglycidyl ether) was added and stirred at room temperature for 2 hours to carry out the addition reaction to obtain the octaamino POSS amine compound. The mass ratio of octaaminoPOSS to ethylene glycol diglycidyl ether is 1:1.1, the amount of the base catalyst DBU added is 0.4% of the total reactant mass, and the amount of the organic solvent added is 140% of the total reactant mass. S3. Preparation of acrylamide compounds: An acrylate compound (composed of alkyl methacrylate and 2-aminoethyl methacrylate hydrochloride in a mass ratio of 1:1) was mixed with a basic amino acid (histidine) in a mass ratio of 2:1 in a reaction flask. Then, 0.2% of the total reactants were added as a catalyst (triethylamine) and excess ethanol solvent. The addition reaction was carried out at room temperature for 48 hours to obtain an acrylamide compound. S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: ① The acrylamide compound and crosslinking agent (2-phosphonobutane-1,2,4-tricarboxylic acid) were added to a reaction flask, followed by the addition of deionized water. After ultrasonic treatment for 25 minutes, an acid-base buffer solution was added to adjust the pH of the system to 4.5–5.3. Then, EDC / NHS activator (added at a mass ratio of 1:1) was added and the mixture was stirred for 22 hours to obtain solution A. The mass ratio of acrylamide compound, crosslinking agent, and activator was 0.6:0.4:0.07, and the total mass concentration of acrylamide compound and crosslinking agent in solution A was 1.0 wt%. ② Add all the obtained octaamino POSS amine compounds to the reaction flask, then add deionized water with a mass of 6 times that of the octaamino POSS amine compounds and stir until homogeneous to obtain solution B; ③ Mix all of the solutions A and B, stir and react at room temperature for 24 hours, then dialyze with DPBS buffer and acidic deionized water (pH 4-5) for 12 hours respectively, and then freeze dry to obtain a slow-release antibacterial scale inhibitor self-cleaning agent.

[0052] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 10 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0053] Example 11

[0054] This embodiment 11 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: The mixture contains 65 parts of polyurethane resin, 15 parts of slow-release antibacterial and scale-inhibiting self-cleaning agent, 20 parts of methanol solvent, 1.0 part of adhesion promoter (maleic anhydride grafted modified chlorinated polypropylene emulsion), 1.0 part of acrylic leveling agent, and 0.1 part of polyether defoamer. The specific preparation process of the slow-release antibacterial scale inhibitor self-cleaning agent is the same as in Example 10.

[0055] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 11 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0056] Example 12

[0057] This embodiment 12 provides a slow-release antibacterial and scale-inhibiting self-cleaning material, which comprises the following components in parts by weight: 72 parts polyurethane resin, 13 parts slow-release antibacterial and scale-inhibiting self-cleaning agent, 15 parts ethanol solvent, 2.0 parts adhesion promoter (maleic anhydride grafted modified chlorinated polypropylene emulsion), 1.0 part polysiloxane-polyether copolymer leveling agent, and 0.2 parts organosilicon defoamer. The specific preparation process of the slow-release antibacterial scale inhibitor self-cleaning agent is the same as in Example 10.

[0058] Application: The slow-release antibacterial and scale-inhibiting self-cleaning material obtained in Example 12 is coated onto the surface of plastic packaging products. After drying and curing, a slow-release antibacterial and scale-inhibiting self-cleaning coating is obtained. This coating enables plastic packaging products to achieve slow-release antibacterial, scale-inhibiting and self-cleaning effects.

[0059] Comparative Example 1

[0060] Comparative Example 1 also provides a material comprising the following components in parts by weight: 80 parts polyurethane resin, 20 parts solvent ethanol, 0.5 parts adhesion promoter maleic anhydride graft-modified chlorinated polypropylene emulsion, 1.0 part acrylic leveling agent, and 0.2 parts polyether defoamer; the material of Comparative Example 1 is then coated onto the surface of a plastic packaging product, and after drying and curing, a coating is formed.

[0061] The main difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not include a slow-release antibacterial scale inhibitor self-cleaning agent in its components, and the weight of the omitted self-cleaning agent is added to the weight of the polyurethane resin, that is, the polyurethane resin of Comparative Example 1 is 80 parts.

[0062] test: The coatings formed on the surface of plastic packaging products using the materials of Examples 1-12 and Comparative Example 1 were tested for abrasion resistance, fastness, antibacterial properties, and scale inhibition performance. Among them, the abrasion resistance test was conducted according to ASTM D4060; the fastness grade test was evaluated by the cross-cut adhesion test; the antibacterial property was determined according to GB / T4789.2-2003 for the determination of antibacterial flora; the scale inhibition performance test was conducted by testing the scale formation of the coating in a supersaturated calcium carbonate solution at 60℃. The specific test results are shown in Table 1 below: Table 1 shows the test results of the coatings formed from the materials of Examples 1-12 and Comparative Example 1.

[0063] The unit for abrasion resistance in Table 1 is mg·(1000g·1000 rpm). -1 Antibacterial rate A represents the antibacterial rate of Staphylococcus aureus (%), antibacterial rate B represents the antibacterial rate of Staphylococcus aureus after 200 water washes, antibacterial rate C represents the antibacterial rate of Escherichia coli, and antibacterial rate D represents the antibacterial rate of Escherichia coli after 200 water washes. In the scale inhibition performance test, 500h, 1500h, and 3000h represent the scaling condition of the coating surface after 500h, 1500h, and 3000h tests, respectively. The lower the value, the better the scale inhibition performance.

[0064] As can be seen from the test results in Table 1, the coatings formed by the materials in Examples 1 to 12 of the present invention exhibit excellent performance in terms of abrasion resistance, fastness, antibacterial properties, and scale inhibition. However, the coating of Comparative Example 1, which did not use the slow-release antibacterial and scale-inhibiting self-cleaning agent prepared in this invention, is significantly worse in terms of abrasion resistance, fastness, antibacterial properties, and scale inhibition.

[0065] This invention prepares an amino-containing POSS and modifies it with a compound containing epoxy groups to prepare a scale inhibitor and self-cleaning agent with slow-release antibacterial effect. Then, a slow-release antibacterial and scale inhibitor self-cleaning material is prepared based on this, and then applied to the surface of polyolefin plastic packaging products to form a self-cleaning coating. This enables the plastic packaging products to achieve slow-release antibacterial, scale inhibition and self-cleaning effects, solving the problems of existing polyolefin plastic packaging products being prone to bacterial growth, dirt accumulation and difficulty in cleaning.

[0066] The above-described preferred embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of the invention. Any obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A slow release antibacterial scale inhibiting self-cleaning material, characterized in that, The slow-release antibacterial and scale-inhibiting self-cleaning material comprises the following components by weight: 65-80 parts of polyurethane resin, 10-15 parts of slow-release antibacterial and scale-inhibiting self-cleaning agent, 15-20 parts of solvent, 0.1-2.0 parts of adhesion promoter, 0.1-2.0 parts of leveling agent, and 0.1-0.2 parts of defoaming agent; The slow-release antibacterial and scale-inhibiting self-cleaning agent is obtained by reacting an octa-amine POSS amine compound, an acrylamide compound, and a crosslinking agent under the action of an activator.

2. The slow release antibacterial and scale inhibition self-cleaning material according to claim 1, characterized in that, The polyurethane resin is a commercially available polyurethane resin with a molecular weight of 10,000-50,000; the solvent is selected from methanol or ethanol; and the adhesion promoter is a maleic anhydride grafted modified chlorinated polypropylene emulsion.

3. The slow release antibacterial and scale inhibition self-cleaning material according to claim 1, wherein, The leveling agent is selected from one or a combination of both of an acrylic leveling agent and a polysiloxane-polyether copolymer; and the defoaming agent is selected from one or a combination of both of a polyether defoaming agent and a silicone defoaming agent.

4. The slow release antibacterial and scale inhibition self-cleaning material according to claim 1, wherein, The preparation method of the slow-release antibacterial and scale-inhibiting self-cleaning agent comprises the following steps: S1. Preparation of octa-amine POSS: The coupling agent and the alcohol are stirred and mixed, and then the acid is added dropwise for reaction. After the white precipitate appears, the stirring is stopped, and the mixture is left to stand, filtered, and washed to obtain white powder of octa-amine POSS; S2. Preparation of octa-amine POSS amine compound: The octa-amine POSS, the base catalyst, and the organic solvent are stirred and pre-mixed, and then the compound containing an epoxy group is added for reaction to obtain the octa-amine POSS amine compound; S3. Preparation of acrylamide compound: The acrylate compound and the amino acid are mixed, and then the catalyst and the alcohol solvent are added for reaction to obtain the acrylamide compound; S4. Preparation of slow-release antibacterial and scale-inhibiting self-cleaning agent: The acrylamide compound, the crosslinking agent, and the deionized water are mixed, and then the system is adjusted to be acidic after ultrasonic treatment. Then the activator is added and stirred to obtain solution A. The octa-amine POSS amine compound and the deionized water are stirred and mixed to obtain solution B. The solution A and the solution B are mixed and stirred for reaction at room temperature. After reaction, the solutions are dialyzed with buffer and acidic deionized water, respectively, and then freeze-dried to obtain the slow-release antibacterial and scale-inhibiting self-cleaning agent.

5. The slow release antibacterial and scale inhibition self-cleaning material according to claim 4, wherein the metal oxide is selected from the group consisting of titanium dioxide, zinc oxide, and mixtures thereof. In step S1, the coupling agent is APTES, the alcohol is anhydrous methanol, and the acid is hydrochloric acid. The volume ratio of the coupling agent, the alcohol, and the acid is 1:(6-10):(1-2).

6. The slow release antibacterial and scale inhibition self-cleaning material according to claim 4, wherein the metal oxide is selected from the group consisting of titanium dioxide, zinc oxide, and mixtures thereof. In step S2, the mass ratio of the octa-amine POSS to the compound containing an epoxy group is 1:(1.1-1.2), the addition amount of the base catalyst is 0.3-0.7% of the total reaction mass, and the addition amount of the organic solvent is 130-150% of the total reaction mass. The compound containing an epoxy group is selected from at least one of glycidyl ether, 1,4-butanediol diglycidyl ether, resorcinol diglycidyl ether, and ethylene glycol diglycidyl ether; the organic solvent is selected from at least one of tetrahydrofuran, chloroform, toluene, and acetone; and the base catalyst is DBU.

7. The slow release antibacterial and scale inhibition self-cleaning material according to claim 4, wherein the metal oxide is selected from the group consisting of titanium dioxide, zinc oxide, and mixtures thereof. The mass ratio of the acrylic ester compound to the basic amino acid in step S3 is (2-2.4):1, the catalyst is added in an amount of 0.1-0.3% of the total mass of the reactants, the reaction time is 48-60 hours; The acrylic ester compound is at least one selected from the group consisting of alkyl methacrylate, 2-aminoethyl methacrylate hydrochloride, methacryloyl ethyl sulfobetaine, and methacryloyloxy ethyl phosphoryl choline; the amino acid is at least one selected from the group consisting of histidine, arginine, and lysine; and the catalyst is at least one selected from the group consisting of triethylamine, tetraethyl lead, and phenyl phosphine.

8. The slow release antibacterial and scale inhibition self-cleaning material according to claim 4, wherein, The mass ratio of the acrylamide compound, the crosslinking agent, and the activator in step S4 is (0.6-0.7):(0.4-0.5):(0.06-0.1); The mass concentration of the solution A is 1.0-1.5%; The mass ratio of the octaamine POSS amine compound to deionized water is 1:(6-8). The crosslinking agent is 2-phosphonic acid butane-1,2,4-tricarboxylic acid, and the activator is EDC / NHS activator.

9. A slow release antibacterial scale-inhibiting self-cleaning coating characterized in that, The self-cleaning coating is formed by coating and curing the slow-release antibacterial and scale-inhibiting self-cleaning material according to any one of claims 1-8.

10. A plastic packaging article, characterized by The surface of the plastic packaging product is formed with the slow-release antibacterial and scale-inhibiting self-cleaning coating according to claim 9.

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