ABS (acrylonitrile butadiene styrene) plastic for cosmetic bottle cap and preparation process of ABS plastic
The antibacterial composite film was prepared by mesoporous nano zinc oxide combined with tea polyphenols and ABS resin, which solved the oxidative degradation of ABS plastic for cosmetic bottle caps and the toxicity of antibacterial agents, achieving efficient antioxidant and antibacterial effects.
Patent Information
- Application Number
- CN202510829215.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-20
- Publication Date
- 2025-08-15
AI Technical Summary
The ABS plastic used in existing cosmetic bottle caps is easily oxidized and degraded during use, and traditional organic antibacterial agents have a risk of toxicity, while natural extracts are prone to precipitation, resulting in a decrease in anti-aging performance.
The complex of mesoporous nano zinc oxide equipped with tea polyphenols is combined with ABS resin, and the antibacterial composite film is formed by coating the antibacterial composite film to enhance antioxidant and antibacterial properties.
It improves the anti-aging and antibacterial properties of ABS plastics, reduces the precipitation of tea polyphenols, enhances thermal stability, and reduces the risk of toxicity to the human body.
Smart Images
Figure CN120484430A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of plastics, and in particular to ABS plastic for cosmetic bottle caps and a preparation process thereof. Background Art
[0002] Cosmetics come in a variety of forms, most of which are liquids, creams, and powders. To isolate them from the outside world and external bacteria, they are stored in cosmetic bottles. The opening of the cosmetic bottle is exposed to the outside world, so to minimize the impact of the external environment on the cosmetics, a cosmetic bottle cap is installed at the opening. The cap is usually made of ABS plastic, which is made from ABS resin and various other additives.
[0003] During the use of the bottle cap, bacteria and residual lotion and other skin care products on the user's hands will remain on the bottle cap, causing the plastic to undergo oxidative degradation to a certain extent, thereby accelerating the aging of the cosmetic bottle cap. In order to increase the antibacterial and antioxidant properties of the bottle cap, organic antibacterial agents and antioxidants are usually added, but organic additives have certain toxicity and are harmful to the human body if used for a long time. Some natural extracts discovered so far are non-toxic and have antioxidant and antibacterial properties, but these extracts are easily precipitated in the bottle cap, resulting in a decrease in the anti-aging performance of the plastic. Therefore, an ABS plastic for cosmetic bottle caps and a preparation process thereof are needed to solve the above problems. Summary of the Invention
[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an ABS plastic for cosmetic bottle caps and a preparation process thereof.
[0005] Disclosed is an ABS plastic for cosmetic bottle caps, comprising the following raw materials in parts by weight: 100-110 parts of ABS resin, 3-5 parts of a tea polyphenol-mesoporous nano zinc oxide ligand, and 8-10 parts of a toughening agent, wherein the tea polyphenol-mesoporous nano zinc oxide ligand is prepared by carrying tea polyphenol on mesoporous nano zinc oxide; and the ABS plastic is coated with an antibacterial composite membrane liquid, wherein the antibacterial composite membrane liquid is composited with antibacterial compounds.
[0006] A preparation process of ABS plastic for cosmetic bottle caps, specifically comprising the following steps: S1: Preparation of mesoporous nano-ZnO and antibacterial compounds; S2: mesoporous nano-zinc oxide loaded with tea polyphenols; S3: Synthesis of ABS plastic; S4: Preparation of antibacterial complex membrane liquid and coating treatment of ABS plastic.
[0007] Furthermore, the preparation of the mesoporous nano zinc oxide comprises the following specific steps: Z1: Dissolve 1-1.2 parts by weight of Zn(NO3)2·6H2O and 6-6.05 parts by weight of CO(NH2)2 in 100-120 parts by volume of ultrapure water, add 0.3-0.36 parts by weight of template 1 and 0.3-0.36 parts by weight of template 2 under stirring, stir for 10-15 minutes, then slowly add CH3COOH dropwise to adjust the solution pH to 4-5, close the stirring for 1-2 hours, and react at a constant temperature of 80-90°C for 16-20 hours; Z2: After the reaction is completed, the mixture is cooled naturally to room temperature, the mixed solution is taken out, and the precipitate is obtained by centrifugation. The precipitate is washed 3-4 times with 50-60% ethanol aqueous solution and dried at 60-70°C for 18-20h; Z3: Use a Soxhlet extractor with anhydrous ethanol as the extractant to extract the precipitate for 10-12 hours, dry it at 70-80°C for 10-12 hours to obtain a precursor, place the precursor in a crucible, transfer it to a muffle furnace and calcine it at 250-270°C for 80-90 minutes to obtain mesoporous nano zinc oxide.
[0008] Furthermore, the preparation of the antibacterial compound comprises the following specific steps: K1: corn straw cellulose is mixed with 8-10% sulfuric acid at a solid-liquid ratio of 1-1.2 parts by weight: 20-25 parts by volume, and acid hydrolyzed at 80-85°C for 1-1.5 hours. The mixture is centrifuged and washed until neutral, freeze-dried in vacuo for 18-24 hours, ground, and sieved through a 200-220 mesh screen to obtain corn straw microcrystalline cellulose. K2: Dandelion powder is mixed with a 40-50% ethanol aqueous solution at a solid-liquid ratio of 1-1.1 parts by weight: 20-24 parts by volume, and the mixture is sonicated for 20-25 minutes. The mixture is heated in a water bath at 70-78°C for 1.5-2 hours. After filtering the extract, the solid is added with 24-32 parts by volume of water and heated in a water bath under the same extraction conditions. The two extracts are combined and the filtered residue is refrigerated at 4-6°C for 7-10 hours. The extract is centrifuged, and the supernatant is concentrated by rotary evaporation, dried and pulverized to obtain a dandelion extract.
[0009] Furthermore, the first template agent is Poloxamer 188 template agent, and the second template agent is sucrose template agent.
[0010] Furthermore, the mesoporous nano zinc oxide is loaded with tea polyphenols, and the specific steps are: 6-8 parts by weight of tea polyphenols are dissolved in 60-80 parts by volume of ultrapure water to obtain a tea polyphenol solution; 1-1.5 parts by weight of mesoporous nano-zinc oxide is added to 40-60 parts by volume of ultrapure water and ultrasonically dispersed for 1-3 minutes to obtain a carrier dispersion liquid; the tea polyphenol solution is uniformly poured into the carrier dispersion liquid under stirring; the mixture is vacuum-stirred for 30-40 minutes; the precipitate and supernatant are separated by centrifugation; the precipitate is washed with ultrapure water for 3-5 times; and the precipitate is vacuum-dried at 40-50° C. for 18-20 hours to obtain a tea polyphenol-mesoporous nano-zinc oxide complex.
[0011] Furthermore, the entire process of vacuum stirring and vacuum drying is carried out in a dark and oxygen-free environment.
[0012] Furthermore, the synthesis of the ABS plastic comprises the following specific steps: Add ABS resin, tea polyphenol-mesoporous nano zinc oxide ligand and toughening agent into a high-speed mixer in a mass ratio of 100-110:3-5:8-10 and mix evenly to obtain a premix. Send the premix into a screw extruder for melt blending. Set the temperature to 180-200°C and the speed to 40-50r / min. Mix for 10-12 minutes, extrude and granulate, and dry at 70-80°C for 3-4 hours to obtain ABS plastic.
[0013] Furthermore, the toughening agent is natural rubber.
[0014] Furthermore, the preparation of the antibacterial complex membrane liquid and the coating treatment of ABS plastic are specifically carried out as follows: Corn straw microcrystalline cellulose and 1-butyl-3-methylimidazolium chloride are mixed in a mass ratio of 4-8:92-96, stirred and dissolved at 80-90°C, dandelion extract is added, stirred and dissolved, and allowed to stand for 1-1.5 hours to remove bubbles to obtain an antibacterial complex membrane liquid. The antibacterial complex membrane liquid is scraped and applied to the surface of ABS plastic, and immersed in deionized water for 10-15 minutes to form a wet film, which is then dried at 60-70°C for 20-24 hours to form an antibacterial film on the surface of the ABS plastic. Beneficial effects
[0015] 1. The present invention uses mesoporous nano-zinc oxide to carry tea polyphenols, which can increase the retention time of tea polyphenols in ABS plastic. After the nano-zinc oxide is loaded with tea polyphenols, the single-piece two-dimensional mesoporous carrier is completely wrapped by the tea polyphenols to form a relatively regular spherical shape. The zinc ions on the surface of the mesoporous nano-zinc oxide carrier react with the tea polyphenols. The zinc ions cooperate with the ester carbonyl and phenolic hydroxyl groups in the tea polyphenols, so that the formed ligand can adhere to the surface of the ABS resin. At the same time, the lower pH value allows the system to contain more hydrogen ions, which can inhibit the outward release of tea polyphenols in the ligand system, reduce the precipitation of tea polyphenols, and improve the anti-aging performance of the ABS plastic.
[0016] 2. The present invention adopts a template filtration method to prepare mesoporous nano zinc oxide, which can obtain a two-dimensional porous material with a relatively concentrated mesopore size distribution range. By using two template agents in combination, zinc oxide is deposited into the pores of the template and then the template is removed to increase the specific surface area and pore volume of nano zinc oxide, which can provide more surface binding sites, which is beneficial to increase the subsequent loading amount of tea polyphenols and improve the overall antioxidant and antibacterial properties.
[0017] 3. The present invention uses an antibacterial complex to coat ABS plastic, which can further improve the antibacterial properties of the plastic. The corn straw microcrystalline cellulose and dandelion extract are compounded to form a regular and evenly distributed film, which can play a certain barrier role. At the same time, there is a strong hydrogen bond between the two, which can improve the thermal stability of the system. The dandelion extract can destroy the cell membrane of bacteria, causing the intracellular substances to seep out, causing the bacteria to die, and improving the antibacterial effect.
[0018] 4. The present invention prepares nano-scale zinc oxide, which can utilize the characteristics of nanomaterials due to the nano effect, so that zinc oxide has a larger specific surface area and higher surface energy, thereby having a strong adsorption force on ABS plastic, which is conducive to the development of antioxidant and antibacterial properties.
[0019] 5. The present invention uses natural rubber as a toughening agent, which can make up for the defect of ABS resin being brittle, improve the impact strength, and reduce the cost of using additives. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a flow chart of the preparation process of ABS plastic for cosmetic bottle caps used in an embodiment of the present invention; Figure 2 This is a table of experimental data of the tea polyphenols loading amount and antioxidant test experiment of the comparative example of the present invention. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1
[0022] Disclosed is an ABS plastic for cosmetic bottle caps, comprising the following raw materials in parts by weight: 100 parts of ABS resin, 3 parts of a tea polyphenol-mesoporous nano zinc oxide ligand, and 8 parts of a toughening agent, wherein the tea polyphenol-mesoporous nano zinc oxide ligand is prepared by carrying tea polyphenol on mesoporous nano zinc oxide; and the ABS plastic is coated with an antibacterial composite membrane liquid, wherein the antibacterial composite membrane liquid is composited with antibacterial compounds.
[0023] A preparation process of ABS plastic for cosmetic bottle caps, such as Figure 1 As shown, the specific steps include: S1: Preparation of mesoporous nano-ZnO 1 part by weight of Zn(NO3)2·6H2O and 6 parts by weight of CO(NH2)2 were dissolved in 100 parts by volume of ultrapure water, and 0.3 parts by weight of Poloxamer 188 template and 0.32 parts by weight of sucrose template were added under stirring. After stirring for 10 minutes, CH3COOH was slowly added dropwise to adjust the solution pH to 4.5. After stirring for 1 hour, the solution was transferred to a hydrothermal reactor, sealed, and kept at 80°C for 16 hours. After the reaction is completed, the mixture is cooled to room temperature naturally, and the mixture is taken out and centrifuged to obtain a white precipitate. The precipitate is washed three times with 50% ethanol aqueous solution and dried at 60°C for 18 hours; Subsequently, a Soxhlet extractor was used with anhydrous ethanol as the extractant to extract for 12 hours to wash away the residual template agent, and the precursor basic zinc carbonate Zn2(OH)2CO3 was obtained after drying at 70°C for 10 hours. The precursor was placed in a crucible and transferred to a muffle furnace and calcined at 250°C for 80 minutes to obtain mesoporous nano zinc oxide. Preparation of antibacterial compounds Corn straw cellulose was mixed with 8% sulfuric acid at a solid-liquid ratio of 1 part by weight: 20 parts by volume, and subjected to acid hydrolysis at 80°C for 1 hour. The product was centrifuged and washed to neutrality, freeze-dried in vacuum for 18 hours, ground, and sieved through 200 mesh to obtain corn straw microcrystalline cellulose. The dandelion powder was mixed with a 40% ethanol aqueous solution at a solid-liquid ratio of 1 part by weight: 20 parts by volume, ultrasonicated for 20 minutes, heated in a water bath at 70°C for 1.5 hours, filtered, and the solid was added with 24 parts by volume of water and heated under the same extraction conditions for 2 hours. The two extracts were combined and the filtered residue was stored in a refrigerator at 4°C for 7 hours. The extract was centrifuged and the supernatant was collected and concentrated by rotary evaporation at 45°C. The concentrate was vacuum freeze-dried, and the dried product was pulverized to obtain a dandelion extract. S2: Mesoporous nano-zinc oxide loaded with tea polyphenols 6 parts by weight of tea polyphenols were dissolved in 60 parts by volume of ultrapure water to obtain a tea polyphenol solution, 1 part by weight of mesoporous nano-zinc oxide was added to 40 parts by volume of ultrapure water and ultrasonically dispersed for 1 minute to obtain a carrier dispersion liquid, the tea polyphenol solution was uniformly poured into the carrier dispersion liquid under stirring, vacuum stirring was performed for 30 minutes, the precipitate and supernatant were separated by centrifugation, the precipitate was washed 3 times with ultrapure water, and the precipitate was vacuum dried at 40° C. for 18 hours to obtain a tea polyphenol-mesoporous nano-zinc oxide complex, and the vacuum stirring and vacuum drying were all carried out in a dark and oxygen-free environment to avoid oxidation loss of tea polyphenols and the complex; S3: Synthesis of ABS plastic ABS resin, tea polyphenol-mesoporous nano zinc oxide ligand, and natural rubber were added into a high-speed mixer at a mass ratio of 100:3:8 and mixed evenly to obtain a premix. The premix was fed into a screw extruder for melt blending. The temperature was set at 180°C and the speed was 40 r / min. The mixture was mixed for 10 minutes, extruded into granules, and dried at 70°C for 3 hours to obtain ABS plastic. S4: Preparation of antibacterial composite membrane solution and coating of ABS plastic Corn straw microcrystalline cellulose and 1-butyl-3-methylimidazolium chloride were mixed in a mass ratio of 4:96, stirred and dissolved at 80°C, dandelion extract was added, stirred and dissolved, and allowed to stand for 1 hour to remove bubbles to obtain an antibacterial complex membrane liquid. The antibacterial complex membrane liquid was scraped onto the surface of ABS resin and soaked in deionized water for 10 minutes to remove 1-butyl-3-methylimidazolium chloride to form a wet film, which was dried at 60°C for 20 hours to form an antibacterial film on the ABS plastic surface. Example 2
[0024] Disclosed is an ABS plastic for cosmetic bottle caps, comprising the following raw materials in parts by weight: 110 parts of ABS resin, 5 parts of a tea polyphenol-mesoporous nano zinc oxide ligand, and 10 parts of a toughening agent, wherein the tea polyphenol-mesoporous nano zinc oxide ligand is prepared by carrying tea polyphenol on mesoporous nano zinc oxide; and the ABS plastic is coated with an antibacterial composite membrane liquid, wherein the antibacterial composite membrane liquid is composited with antibacterial compounds.
[0025] A preparation process of ABS plastic for cosmetic bottle caps, such as Figure 1 As shown, the specific steps include: S1: Preparation of mesoporous nano-ZnO 1.2 parts by weight of Zn(NO3)2·6H2O and 6.05 parts by weight of CO(NH2)2 were dissolved in 120 parts by volume of ultrapure water, and 0.36 parts by weight of Poloxamer 188 template and 0.3 parts by weight of sucrose template were added under stirring. After stirring for 10 minutes, CH3COOH was slowly added dropwise to adjust the solution pH to 4. After stirring for 1 hour, the solution was transferred to a hydrothermal reactor, sealed, and kept at 80°C for 16 hours. After the reaction is completed, the mixture is cooled to room temperature naturally, and the mixture is taken out and centrifuged to obtain a white precipitate. The precipitate is washed three times with 55% ethanol aqueous solution and dried at 60°C for 18 hours; Subsequently, a Soxhlet extractor was used with anhydrous ethanol as the extractant to extract for 12 hours to wash away the residual template agent, and the precursor basic zinc carbonate Zn2(OH)2CO3 was obtained after drying at 70°C for 10 hours. The precursor was placed in a crucible and transferred to a muffle furnace and calcined at 250°C for 80 minutes to obtain mesoporous nano zinc oxide. Preparation of antibacterial compounds Corn straw cellulose was mixed with 10% sulfuric acid at a solid-liquid ratio of 1.2 parts by weight: 23 parts by volume, and subjected to acid hydrolysis at 80°C for 1 hour. The product was centrifuged and washed to neutrality, freeze-dried in vacuum for 18 hours, ground, and sieved through 200 mesh to obtain corn straw microcrystalline cellulose. The dandelion powder was mixed with a 50% ethanol aqueous solution at a solid-liquid ratio of 1.05 parts by weight: 22 parts by volume, and the mixture was ultrasonicated for 20 minutes. The mixture was heated in a water bath at 70°C for 1.5 hours. After filtering the extract, the solid was added with 24 parts by volume of water and heated under the same extraction conditions for 2 hours. The two extracts were combined and the filtered residue was stored in a refrigerator at 4°C for 7 hours. The extract was centrifuged and the supernatant was collected. The supernatant was concentrated by rotary evaporation at 45°C, the concentrate was freeze-dried in a vacuum, and the dried product was pulverized to obtain a dandelion extract. S2: Mesoporous nano-zinc oxide loaded with tea polyphenols 8 g of tea polyphenols were dissolved in 70 parts by volume of ultrapure water to obtain a tea polyphenol solution, 1.5 parts by weight of mesoporous nano-zinc oxide was added to 50 parts by volume of ultrapure water and ultrasonically dispersed for 1 minute to obtain a carrier dispersion liquid, the tea polyphenol solution was uniformly poured into the carrier dispersion liquid under stirring, vacuum stirring was performed for 30 minutes, the precipitate and supernatant were separated by centrifugation, the precipitate was washed 3 times with ultrapure water, and the precipitate was vacuum dried at 40° C. for 18 hours to obtain a tea polyphenol-mesoporous nano-zinc oxide complex. The vacuum stirring and vacuum drying were all carried out in a dark and oxygen-free environment to avoid oxidation loss of tea polyphenols and the complex; S3: Synthesis of ABS plastic ABS resin, tea polyphenol-mesoporous nano zinc oxide ligand, and natural rubber were added into a high-speed mixer in a mass ratio of 110:5:10 and mixed evenly to obtain a premix. The premix was fed into a screw extruder for melt blending. The temperature was set at 180°C and the speed was 40 r / min. The mixture was mixed for 10 minutes, extruded into granules, and dried at 70°C for 3 hours to obtain ABS plastic. S4: Preparation of antibacterial composite membrane solution and coating of ABS plastic Corn straw microcrystalline cellulose and 1-butyl-3-methylimidazolium chloride were mixed in a mass ratio of 8:92, stirred and dissolved at 80°C, dandelion extract was added, stirred and dissolved, and allowed to stand for 1 hour to remove bubbles to obtain an antibacterial complex membrane liquid. The antibacterial complex membrane liquid was scraped onto the surface of ABS resin and soaked in deionized water for 10 minutes to remove 1-butyl-3-methylimidazolium chloride to form a wet film, which was dried at 60°C for 20 hours to form an antibacterial film on the ABS plastic surface. Example 3
[0026] Disclosed is an ABS plastic for cosmetic bottle caps, comprising the following raw materials in parts by weight: 100 parts of ABS resin, 3 parts of a tea polyphenol-mesoporous nano zinc oxide ligand, and 8 parts of a toughening agent, wherein the tea polyphenol-mesoporous nano zinc oxide ligand is prepared by carrying tea polyphenol on mesoporous nano zinc oxide; and the ABS plastic is coated with an antibacterial composite membrane liquid, wherein the antibacterial composite membrane liquid is composited with antibacterial compounds.
[0027] A preparation process of ABS plastic for cosmetic bottle caps, such as Figure 1 As shown, the specific steps include: S1: Preparation of mesoporous nano-ZnO 1 part by weight of Zn(NO3)2·6H2O and 6 parts by weight of CO(NH2)2 were dissolved in 100 parts by volume of ultrapure water, and 0.3 parts by weight of Poloxamer 188 template and 0.32 parts by weight of sucrose template were added under stirring. After stirring for 12 minutes, CH3COOH was slowly added dropwise to adjust the pH of the solution to 4.5. After stirring for 1.5 hours, the solution was transferred to a hydrothermal reactor, sealed, and kept at 85°C for 18 hours. After the reaction is completed, the mixture is cooled to room temperature naturally, and the mixture is taken out and centrifuged to obtain a white precipitate. The precipitate is washed 4 times with 50% ethanol aqueous solution and dried at 65°C for 19 hours; Subsequently, a Soxhlet extractor was used with anhydrous ethanol as the extractant to extract for 10 h to wash away the residual template agent, and the precursor basic zinc carbonate Zn2(OH)2CO3 was obtained after drying at 75 ° C for 12 h. The precursor was placed in a crucible and transferred to a muffle furnace and calcined at 270 ° C for 85 min to obtain mesoporous nano zinc oxide; Preparation of antibacterial compounds Corn straw cellulose was mixed with 8% sulfuric acid at a solid-liquid ratio of 1 part by weight: 20 parts by volume, and subjected to acid hydrolysis at 85°C for 1.2 hours. The product was centrifuged and washed to neutrality, freeze-dried in vacuum for 20 hours, ground, and sieved through 220 mesh to obtain corn straw microcrystalline cellulose. The dandelion powder was mixed with a 40% ethanol aqueous solution at a solid-liquid ratio of 1 part by weight: 20 parts by volume, and ultrasonicated for 24 minutes. The mixture was heated in a water bath at 75°C for 2 hours. After filtering the extract, the solid was added with 24 parts by volume of water and heated under the same extraction conditions for 2 hours. The two extracts were combined and the filtered residue was stored in a refrigerator at 5°C for 8.5 hours. The extract was centrifuged and the supernatant was collected. The supernatant was concentrated by rotary evaporation at 50°C. The concentrate was freeze-dried in a vacuum oven, and the dried product was pulverized to obtain a dandelion extract. S2: Mesoporous nano-zinc oxide loaded with tea polyphenols 6 parts by weight of tea polyphenols were dissolved in 60 parts by volume of ultrapure water to obtain a tea polyphenol solution, 1 part by weight of mesoporous nano-zinc oxide was added to 40 parts by volume of ultrapure water and ultrasonically dispersed for 3 minutes to obtain a carrier dispersion liquid, the tea polyphenol solution was uniformly poured into the carrier dispersion liquid under stirring, vacuum stirring was performed for 35 minutes, the precipitate and supernatant were separated by centrifugation, the precipitate was washed 4 times with ultrapure water, and the precipitate was vacuum dried at 45° C. for 19 hours to obtain a tea polyphenol-mesoporous nano-zinc oxide complex, and the vacuum stirring and vacuum drying were all carried out in a dark and oxygen-free environment to avoid oxidation loss of tea polyphenols and the complex; S3: Synthesis of ABS plastic ABS resin, tea polyphenol-mesoporous nano zinc oxide ligand, and natural rubber were added into a high-speed mixer in a mass ratio of 100:3:8 and mixed evenly to obtain a premix. The premix was fed into a screw extruder for melt blending. The temperature was set at 190°C and the speed was 45 r / min. The mixture was mixed for 12 minutes, extruded into granules, and dried at 75°C for 3.5 hours to obtain ABS plastic. S4: Preparation of antibacterial composite membrane solution and coating of ABS plastic Corn straw microcrystalline cellulose and 1-butyl-3-methylimidazolium chloride were mixed in a mass ratio of 4:96, stirred and dissolved at 85°C, dandelion extract was added, stirred and dissolved, and allowed to stand for 1.2 hours to remove bubbles to obtain an antibacterial complex membrane liquid. The antibacterial complex membrane liquid was scraped onto the surface of ABS resin and soaked in deionized water for 12 minutes to remove 1-butyl-3-methylimidazolium chloride to form a wet film. The film was dried at 65°C for 22 hours to form an antibacterial film on the ABS plastic surface.
[0028] Comparative Example 1 Compared with Example 1, this comparative example 1 uses tea polyphenols to directly melt co-extrude with ABS resin. The specific process steps are: ABS resin, tea polyphenols, and natural rubber are added to a high-speed mixer in a mass ratio of 100:3:8 and mixed evenly to obtain a premix, and the premix is fed into a screw extruder for melt blending. The temperature is set to 180° C. and the speed is 40 r / min. The mixing is carried out for 10 minutes, the extrusion is granulated, and the ABS plastic is dried at 70° C. for 3 hours to obtain ABS plastic, which is recorded as comparative example 1. The tea polyphenol loading capacity test experiment is carried out on the ABS plastic prepared in Example 1 and the ABS plastic prepared in Example 1 respectively; The test steps for the tea polyphenol loading capacity are as follows: 100 g of ABS plastic was washed three times with deionized water, the eluates were collected and combined, the absorbance of the eluates was measured, and the tea polyphenol loading capacity in the ABS plastic was obtained based on a linear standard curve after the tea polyphenols were dissolved in deionized water, which were respectively recorded as Example 1 and Comparative Example 1; like Figure 2As shown, it can be seen that the tea polyphenols loading amount of the ABS plastic prepared in Example 1 is higher than that in Comparative Example 1. The mesoporous nano zinc oxide carrying tea polyphenols can promote the retention rate of tea polyphenols in the ABS plastic, which is beneficial to the improvement of the anti-aging performance.
[0029] Antioxidant test experiments were conducted on the tea polyphenol-mesoporous nano zinc oxide complex of Example 1 and the tea polyphenol of Comparative Example 1; The antioxidant test steps are as follows: take two 10 mL portions of 95% ethanol solution containing 0.1 mm g / mL DPPH, add 5 mg of tea polyphenol-mesoporous nano zinc oxide complex and tea polyphenol respectively, seal, shake in the dark at 150 r / min and 23 ° C for 0.55 h, filter out the precipitate, take the filtrate and measure the absorbance A1 at 517 nm, take another 10 mL of 95% ethanol solution containing 0.1 mm g / mL DPPH, shake for 0.5 h under the same conditions, measure the absorbance A0 at 517 nm, take another 10 mL of 95% ethanol solution, shake for 0.5 h under the same conditions, measure the absorbance A2 at 517 nm, and calculate the free radical scavenging rate as follows: free radical scavenging rate % = [1-(A1-A2) / A0] × 100%; like Figure 2 As shown, it can be seen that the free radical scavenging rate of the tea polyphenol-mesoporous nano zinc oxide complex used in Example 1 is higher than that in Comparative Example 1, that is, the antioxidant performance of the tea polyphenol-mesoporous nano zinc oxide complex is better than that of tea polyphenol.
[0030] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.
Claims
1. An ABS plastic for cosmetic bottle caps, characterized in that: The invention comprises the following raw materials in parts by weight: 100-110 parts of ABS resin, 3-5 parts of tea polyphenol-mesoporous nano zinc oxide ligand, and 8-10 parts of a toughening agent, wherein the tea polyphenol-mesoporous nano zinc oxide ligand is prepared by carrying tea polyphenol on mesoporous nano zinc oxide; and the ABS plastic is coated with an antibacterial composite membrane liquid, wherein the antibacterial composite membrane liquid is composited with antibacterial compounds.
2. A preparation process of ABS plastic for cosmetic bottle caps, characterized in that: The specific steps include: S1: Preparation of mesoporous nano-ZnO and antibacterial compounds; S2: mesoporous nano-zinc oxide loaded with tea polyphenols; S3: Synthesis of ABS plastic; S4: Preparation of antibacterial complex membrane liquid and coating treatment of ABS plastic.
3. The preparation process of ABS plastic for cosmetic bottle caps according to claim 2, characterized in that: The preparation of the mesoporous nano zinc oxide comprises the following specific steps: Z1: Dissolve 1-1.2 parts by weight of Zn(NO3)2·6H2O and 6-6.05 parts by weight of CO(NH2)2 in 100-120 parts by volume of ultrapure water, add 0.3-0.36 parts by weight of template 1 and 0.3-0.36 parts by weight of template 2 under stirring, stir for 10-15 minutes, then slowly add CH3COOH dropwise to adjust the solution pH to 4-5, close the stirring for 1-2 hours, and react at a constant temperature of 80-90°C for 16-20 hours; Z2: After the reaction is completed, the mixture is cooled naturally to room temperature, the mixed solution is taken out, and the precipitate is obtained by centrifugation. The precipitate is washed 3-4 times with 50-60% ethanol aqueous solution and dried at 60-70°C for 18-20h; Z3: Use a Soxhlet extractor with anhydrous ethanol as the extractant to extract the precipitate for 10-12 hours, dry it at 70-80°C for 10-12 hours to obtain a precursor, place the precursor in a crucible, transfer it to a muffle furnace and calcine it at 250-270°C for 80-90 minutes to obtain mesoporous nano zinc oxide.
4. The preparation process of ABS plastic for cosmetic bottle caps according to claim 2, characterized in that: The preparation of the antibacterial compound comprises the following specific steps: K1: corn straw cellulose is mixed with 8-10% sulfuric acid at a solid-liquid ratio of 1-1.2 parts by weight: 20-25 parts by volume, and acid hydrolyzed at 80-85°C for 1-1.5 hours. The mixture is centrifuged and washed until neutral, freeze-dried in vacuo for 18-24 hours, ground, and sieved through a 200-220 mesh screen to obtain corn straw microcrystalline cellulose. K2: Dandelion powder is mixed with a 40-50% ethanol aqueous solution at a solid-liquid ratio of 1-1.1 parts by weight: 20-24 parts by volume, and the mixture is sonicated for 20-25 minutes. The mixture is heated in a water bath at 70-78°C for 1.5-2 hours. After filtering the extract, the solid is added with 24-32 parts by volume of water and heated in a water bath under the same extraction conditions. The two extracts are combined and the filtered residue is refrigerated at 4-6°C for 7-10 hours. The extract is centrifuged, and the supernatant is concentrated by rotary evaporation, dried and pulverized to obtain a dandelion extract.
5. The preparation process of ABS plastic for cosmetic bottle caps according to claim 3, characterized in that: The first template agent is Poloxamer 188 template agent, and the second template agent is sucrose template agent.
6. The process for preparing ABS plastic for cosmetic bottle caps according to claim 2, characterized in that: The mesoporous nano zinc oxide is loaded with tea polyphenols, and the specific steps are: 6-8 parts by weight of tea polyphenols are dissolved in 60-80 parts by volume of ultrapure water to obtain a tea polyphenol solution; 1-1.5 parts by weight of mesoporous nano-zinc oxide is added to 40-60 parts by volume of ultrapure water and ultrasonically dispersed for 1-3 minutes to obtain a carrier dispersion liquid; the tea polyphenol solution is uniformly poured into the carrier dispersion liquid under stirring; the mixture is vacuum-stirred for 30-40 minutes; the precipitate and supernatant are separated by centrifugation; the precipitate is washed with ultrapure water for 3-5 times; and the precipitate is vacuum-dried at 40-50° C. for 18-20 hours to obtain a tea polyphenol-mesoporous nano-zinc oxide complex.
7. The process for preparing ABS plastic for cosmetic bottle caps according to claim 6, characterized in that: The entire process of vacuuming, stirring and vacuum drying is carried out in a dark and oxygen-free environment.
8. The process for preparing ABS plastic for cosmetic bottle caps according to claim 2, characterized in that: The synthesis of the ABS plastic comprises the following specific steps: Add ABS resin, tea polyphenol-mesoporous nano zinc oxide ligand and toughening agent into a high-speed mixer in a mass ratio of 100-110:3-5:8-10 and mix evenly to obtain a premix. Send the premix into a screw extruder for melt blending. Set the temperature to 180-200°C and the speed to 40-50r / min. Mix for 10-12 minutes, extrude and granulate, and dry at 70-80°C for 3-4 hours to obtain ABS plastic.
9. The process for preparing ABS plastic for cosmetic bottle caps according to claim 8, characterized in that: The toughening agent is natural rubber.
10. The process for preparing ABS plastic for cosmetic bottle caps according to claim 2, characterized in that: The specific steps of preparing the antibacterial complex membrane liquid and coating the ABS plastic are as follows: Corn straw microcrystalline cellulose and 1-butyl-3-methylimidazolium chloride are mixed in a mass ratio of 4-8:92-96, stirred and dissolved at 80-90°C, dandelion extract is added, stirred and dissolved, and allowed to stand for 1-1.5 hours to remove bubbles to obtain an antibacterial complex membrane liquid. The antibacterial complex membrane liquid is scraped and applied to the surface of ABS plastic, and immersed in deionized water for 10-15 minutes to form a wet film, which is then dried at 60-70°C for 20-24 hours to form an antibacterial film on the surface of the ABS plastic.