WO2021147234A1

WO2021147234A1 - Bactericidal plastic masterbatch, preparation method therefor and application thereof

Info

Publication number: WO2021147234A1
Application number: PCT/CN2020/097267
Authority: WO
Inventors: 陈鑫宏; 曹文; 吴银隆; 杨柳; 吴秋琴
Original assignee: 深圳市捷安纳米复合材料有限公司
Priority date: 2020-01-20
Filing date: 2020-06-20
Publication date: 2021-07-29
Also published as: CN111171447A; CN111171447B

Abstract

Disclosed are a bactericidal plastic masterbatch, a preparation method therefor and an application thereof. The bactericidal plastic masterbatch is composed of the following components by weight percentage: 95-99% of plastic powder and 1-5% of a bactericidal nanocomposite material; the bactericidal nanocomposite material is composed of fine particles having a particle size of 30 nm-50 nm, and the contents by weight percentage are 20%-80% silver, 10%-50% copper oxide, and 10%-50% zinc oxide. Products prepared by using the plastic masterbatch of the present invention have been tested by an authoritative organization, and the viable bacteria count obtained by letting stand for 24 hours after inoculation was less than 1 cfu/cm2, the number of residual bacteria on a surface was almost 0, and the sterilization rate was close to 100%.

Description

Sterilization plastic masterbatch and preparation method and application thereof

Technical field

The invention belongs to the technical field of new plastic materials, and specifically relates to a sterilization plastic master batch and a preparation method and application thereof.

Background technique

Because plastics have the characteristics of easy molding, light weight, acid and alkali resistance, etc., they are widely used as raw materials for the manufacture of various daily necessities. But the natural defect of plastics is that bacteria and molds can easily grow on the surface, which is a source of nutrients for the growth and reproduction of microorganisms.

For this reason, countless people have tried to add various antibacterial materials, hoping to solve this problem. However, due to the performance limitations of antibacterial materials, the current "antibacterial" plastics can only achieve bacteriostasis, not sterilization.

The types of antibacterial materials are divided into natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents. Internationally, there are mainly organic antibacterial agents from chemical giants such as DuPont in the United States, and silver ion inorganic antibacterial agents introduced by large companies such as the textile and ceramic industry in Japan. In China, there is a lack of a large-scale antibacterial agent industry, and nano-silver is occasionally used as an antibacterial agent. Examples of sterilization materials, but due to factors such as the production capacity of nanomaterials, downstream application technologies, and cost, it is difficult to achieve industrialization.

From the perspective of the home appliance industry with the most urgent actual needs, the current national standard for antibacterial plastics GB/T 31402-2015 "Test Methods for Antibacterial Performance of Plastic Surfaces", antibacterial testing only detects the antibacterial effect, not sterilization. Even the home appliance industry giants such as Hisense Rongsheng, Panasonic, and Haier, which participated in the formulation of the standard, cannot provide high-performance sterilized plastic products.

... CN105562702B discloses a copper-silver alloy nano-functional material and its preparation method and application. This patent can form an alloy within a large composition ratio of copper and silver. The invented copper-silver nano-functional metal material can be directly used as a kind of sterilization and antibacterial The material can also be used as a quantum dot material for light energy capture. The preparation of the copper-silver nano-functional material with uniform particle size and good dispersibility is based on the process of reflux reduction and mixing and quenching. On the one hand, the process requires that after the design of a suitable reaction solution system is carried out, it is suitable Concentrations of surfactants, complexing agents and reduction protection agents are introduced into a mixed solution of copper and silver at a certain temperature for reflux reduction, which realizes the controllable and coordinated reduction of copper and silver elements. On the other hand, through the mixed quenching process, the precise control of the termination of the reduction reaction is realized and the non-uniform nucleation and growth of particles are restricted. The two processes cooperate with each other and one is indispensable. The process of the copper-silver nano-functional material is relatively complicated, which is not conducive to large-scale production.

technical problem

Type a paragraph describing the technical problem here.

Technical solutions

Based on this, the present invention proposes a sterilization plastic masterbatch and its preparation method and application, aiming to provide a sterilization plastic masterbatch, which uses 20%~80% silver, 10%~50% copper oxide, 10%~50% % Zinc oxide composite particles constitute a sterilizing nanocomposite material. The nanocomposite material is prepared by gasification, evaporation, mixing and cooling. The production process is simple and controllable, and it is convenient for large-scale production; and is better than the existing natural antibacterial agents, organic antibacterial agents and Inorganic antibacterial agents have more powerful bactericidal and anti-mildew abilities. Adding a small amount of nanocomposite materials can achieve the effect that the number of bacterial residues on the surface is almost 0 and the sterilization rate is close to 100%.

To achieve the above objective, the technical solution adopted by the present invention is: a sterilization plastic masterbatch, characterized in that the sterilization plastic masterbatch comprises the following components by weight percentage:

Plastic powder 95~99%,

Sterilizing nanocomposite materials 1~5%,

The particle size of the sterilization nanocomposite material is 30nm-50nm, and the content is 20%-80% silver, 10%-50% copper oxide, and 10%-50% zinc oxide in terms of weight percentage.

The further improved technical solutions in the above-mentioned sterilization plastic masterbatch technical solutions are as follows:

1. In the above technical solution, the sterilization nanocomposite material is composed of composite particles of 70% silver, 15% copper oxide, and 15% zinc oxide.

2. In the above technical solution, the sterilization nanometer is calculated by weight percentage, and the sterilization nanocomposite material is composed of composite particles of 75% silver, 10% copper oxide, and 15% zinc oxide.

3. In the above technical solution, the sterilization nanometer is calculated by weight percentage, and the sterilization nanocomposite material is composed of composite particles of 80% silver, 10% copper oxide, and 10% zinc oxide.

4. In the above technical solution, the sterilization nanometer is calculated by weight percentage, and the sterilization nanocomposite material is composed of composite particles of silver 65%, copper oxide 25%, and zinc oxide 10%.

5. In the above technical solution, the sterilization nanometer is calculated by weight percentage, and the sterilization nanocomposite material is composed of composite particles of 60% silver, 20% copper oxide, and 20% zinc oxide.

6. In the above technical solution, the material of the plastic powder is one or more of polyethylene, polypropylene, polystyrene, polyvinyl chloride, and ABS plastic.

7. In the above technical solution, the material of the plastic powder is a mixed powder of high-density polypropylene and high-density polyethylene, and the weight ratio of high-density polypropylene and high-density polyethylene is 1:1.

8. In the above technical scheme, the material of the plastic powder is a mixed powder of ABS plastic and polyvinyl chloride, and the weight ratio of ABS plastic and polyvinyl chloride is 1:2.

9. In the above technical scheme, the particle size of the plastic powder is 200 mesh to 500 mesh.

The method and technical scheme adopted by the present invention is: a preparation method of sterilizing plastic masterbatch, including the following steps:

S01. Weaving and calendering metallic silver, copper, and zinc wires into metal wire rods, and preparing nanocomposites through vaporization, evaporation, mixing and cooling, wherein, by weight percentage, silver 20%~80%, copper oxide 10%~ 50%, zinc oxide 10%~50%;

S02. Crush ordinary plastic particles to form plastic powder;

S03: Disperse the nanocomposite material obtained in step S01 in water, and use ultrasonic dispersion to obtain a nanomaterial suspension;

S04. Stir the nano material suspension obtained in step S03 and the plastic powder obtained in step S02 at a high speed, and mix them uniformly;

S05, drying, extruding and granulating to obtain sterilized plastic masterbatch.

The technical solutions further improved in the technical solutions of the above methods are as follows:

1. In the above technical solution, the step S01 is specifically: the step S01 is specifically: the metal silver, copper, and zinc wires are braided and rolled into a metal wire rod, and the composite metal wire rod is used as the anode conductor of the DC power supply. The arc formed with the cathode vaporizes and evaporates the tip of the composite metal wire rod as the anode conductor, producing a smoke-like metal atom group. The silver metal atom is fully mixed with copper, zinc, and oxygen atoms to form a gaseous alloy; the gaseous state is transformed by air flow The alloy is cooled, and the cooled powder is collected to obtain a nanocomposite material.

2. In the above technical scheme, the nanocomposite material obtained in the step S01 forms a soft aggregate of 40 microns.

3. In the above technical solution, in the S02, ordinary plastic particles are crushed to form a plastic powder, and the particle size of the plastic powder is 200 mesh to 500 mesh.

4. In the above technical scheme, in the step S03, the nanocomposite material obtained in step S01 is dispersed in water, and additives are added, and ultrasonic dispersion is specifically used to repeatedly impact the nanocomposite material at an ultrasonic frequency of 40K~120K with a frequency conversion ultrasonic device. dispersion.

5. In the above technical scheme, in the step S03, the nanocomposite material obtained in step S01 is dispersed in water, firstly dispersed by a lower frequency ultrasonic, and the program is set from low frequency to high frequency 40K-60K-80K-100K-120K Carry out in order, and then repeat several cycles from high frequency to low frequency.

6. In the above technical scheme, it is characterized in that the step S03 disperses the nanocomposite material obtained in step S01 in water, and first uses a lower frequency ultrasonic dispersion, and the program is set from low frequency to high frequency 40K-60K-80K -100K-120K are carried out in sequence, the dispersion time is 5min, and then from high frequency to low frequency in sequence, repeat 2 cycles.

7. In the above technical solution, the step S05 specifically uses an air energy heat pump dryer, after 24 hours of drying, the mixed powder is melted and pelletized by a screw extruder to form a plastic masterbatch.

The application of sterilization plastic masterbatch in plastic products.

1. In the above technical solution, the application of the sterilization plastic masterbatch in plastic products can be specifically made into a sterilization film, which can be used on the surface of the plastic liner of a refrigerator to play a role of sterilization.

2. In the above technical scheme, the application of sterilizing plastic masterbatch in plastic products can be specifically made into sterilizing film for the interior decoration of clean spaces in medical operating rooms and wards, food and drug production plants, and high-tech electronic product production workshops. The surface of the board plays a role of sterilization.

Beneficial effect

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

1. The bactericidal plastic masterbatch of the present invention is composed of 20% to 80% silver, 10% to 50% copper oxide, and 10% to 50% zinc oxide compound particles in the plastic powder. Organic antibacterial agents and inorganic antibacterial agents have more powerful bactericidal and anti-mildew abilities, and are compatible with the technological requirements of plastic processing.

2. In the preparation method of the sterilization plastic masterbatch of the present invention, the nanocomposite material adopts the nanocomposite material prepared by gasification, evaporation, mixing and cooling. It does not require acid, alkali and other chemical raw materials, and there is no waste water, waste gas, waste residue and other pollutants. ; The production process is simple and controllable, energy consumption is low, and it is convenient for large-scale production; the cleanliness of the product is high, and the quality is guaranteed.

3. The preparation method of the sterilization plastic master batch of the present invention pulverizes ordinary plastic particles to form plastic powder. Through the miniaturization of the plastic material particles, it is beneficial to the uniform distribution of the nanocomposite material in the plastic system, and further improves the nanometer The bactericidal effect of composite materials.

4. The preparation method of the sterilization plastic masterbatch of the present invention uses variable frequency ultrasonic equipment to de-agglomerate the nano materials to ensure that the dispersion of the nano composite materials can be realized. The nano composite materials of the present invention are added to the plastic powder, and the nano composite materials It is evenly distributed in the plastic matrix, so the plastic masterbatch makes the produced plastic products have the distribution of nanocomposite materials in the entire area, and the sterilization effect of the plastic products is complete.

5. The bactericidal plastic masterbatch of the present invention is a finished product plastic particle of a conventional size, which is beneficial to downstream production and application, and realizes technically seamless docking.

6. After the sterilization plastic masterbatch of the present invention is tested and inoculated by an authoritative institution, the number of viable bacteria obtained after being placed for 24 hours is less than 1cfu/cm2, the number of residual bacteria on the surface is almost 0, and the sterilization rate is close to 100%.

Description of the drawings

Figure 1 is a flow chart of the preparation method of the sterilization plastic masterbatch of the present invention.

2A to 2C are the 1300 times, 10000 times and 100 thousand times magnified pictures of the bactericidal plastic masterbatch of Example 1 of the present invention by scanning electron microscope.

The best mode of the present invention

Type here a paragraph describing the best mode of the present invention.

Embodiments of the present invention

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail with reference to the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not used to limit the present invention.

FIG. 1 is a flow chart of the preparation method of the sterilization plastic masterbatch of the present invention, and the embodiment of the present invention will be described in detail below with reference to FIG.

Example 1

A preparation method of sterilization plastic masterbatch includes the following steps:

S01. Weaving and rolling metallic silver, copper, and zinc wires into metal rods, using the composite metal rod as the anode conductor of the DC power supply, and the arc formed with the cathode, vaporizing and evaporating the tip of the composite metal rod as the anode conductor. Smoke-like metal atom clusters, silver metal atoms, copper, zinc, and oxygen atoms are fully mixed to form a gaseous alloy; the gaseous alloy is cooled by air flow, and the cooled powder is collected to obtain a nanocomposite material. In total, 70% silver, 15% copper oxide, 15% zinc oxide;

S02. The high-density polypropylene is crushed and refined to a powder of 200 mesh to 500 mesh;

S03. Disperse the nanocomposite material obtained in step S01 in water, and use a variable frequency ultrasonic device to repeatedly impact and disperse the nanocomposite material at an ultrasonic frequency of 40K~120K for 60 minutes to obtain a nanocomposite material suspension;

S04. Stir the nanocomposite material suspension obtained in step S03 with the high-density polypropylene powder obtained in step S02 at high speed and mix uniformly, so that the dispersed nanocomposite material particles adhere and wrap on the surface of the high-density polypropylene powder particles; where the high density 96% polypropylene powder, 4% sterilizing nanocomposite materials;

S05. Adopt air energy heat pump dryer, after 24 hours of drying, use screw extruder to melt the mixed powder into granulation to make plastic masterbatch.

Example 2

S02. The high-density polypropylene and high-density polyethylene are pulverized and refined to 200-500 mesh powder; the weight ratio of high-density polypropylene and high-density polyethylene is 1:1.

S03. Disperse the nanocomposite material obtained in step S01 in water, add colored titanium dioxide, and use a variable frequency ultrasonic device to repeatedly impact and disperse the nanocomposite material at an ultrasonic frequency of 40K~120K for 60 minutes to obtain a nanocomposite material suspension;

S04. Mix the nanocomposite material suspension obtained in step S03 with the high-density polypropylene and high-density polyethylene mixed powder obtained in step S02 at high speed and mix uniformly, so that the dispersed nanocomposite particles are adhered and wrapped in the high-density polypropylene and The surface of the high-density polyethylene mixed powder particles; the mixed powder of high-density polypropylene and high-density polyethylene is 96%, the sterilization nanocomposite material is 2%, and the colored titanium dioxide is 2%;

Example 3

S01. Weaving and rolling metallic silver, copper, and zinc wires into metal rods, using the composite metal rod as the anode conductor of the DC power supply, and the arc formed with the cathode, vaporizing and evaporating the tip of the composite metal rod as the anode conductor. Smoke-like metal atom clusters, silver metal atoms, copper, zinc, and oxygen atoms are fully mixed to form a gaseous alloy; the gaseous alloy is cooled by air flow to collect the cooled powder to obtain a nanocomposite material, which is calculated by weight percentage , Silver 75%, copper oxide 10%, zinc oxide 15%;

S02. The high-density polyethylene is crushed and refined to a powder of 200 mesh to 500 mesh;

S04. Stir the suspension obtained in step S03 with the high-density polyethylene powder obtained in step S02 at high speed, and mix them evenly, so that the dispersed nanocomposite particles are attached and wrapped on the surface of the high-density polyethylene powder particles, wherein the high-density polyethylene powder 98%, 1% of bactericidal nanocomposite materials, 1% of colored titanium dioxide;

Example 4

S01. Weaving and rolling metallic silver, copper, and zinc wires into metal rods, using the composite metal rod as the anode conductor of the DC power supply, and the arc formed with the cathode, vaporizing and evaporating the tip of the composite metal rod as the anode conductor. Smoke-like metal atom clusters, silver metal atoms, copper, zinc, and oxygen atoms are fully mixed to form a gaseous alloy; the gaseous alloy is cooled by air flow, and the cooled powder is collected to obtain a nanocomposite material. In total, silver 80%, copper oxide 10%, zinc oxide 10%;

S02. The polyvinyl chloride is pulverized and refined to a powder of 200 mesh to 500 mesh;

S03. Disperse the nanocomposite material obtained in step S01 in water, and use a variable frequency ultrasonic device to repeatedly impact and disperse the nanocomposite material at an ultrasonic frequency of 40K~120K for 60 minutes to obtain a composite nanomaterial suspension;

S04. Stir the nanocomposite material suspension obtained in step S03 and the polyvinyl chloride powder obtained in step S02 at high speed and mix uniformly, so that the dispersed nanocomposite material particles adhere and wrap on the surface of the polyvinyl chloride powder particles; wherein the polyvinyl chloride powder 98%, 2% of antibacterial nanocomposite materials;

Example 5

S01. Weaving and rolling metallic silver, copper, and zinc wires into metal rods, using the composite metal rod as the anode conductor of the DC power supply, and the arc formed with the cathode, vaporizing and evaporating the tip of the composite metal rod as the anode conductor. Smoke-like metal atom clusters, silver metal atoms, copper, zinc, and oxygen atoms are fully mixed to form a gaseous alloy; the gaseous alloy is cooled by air flow, and the cooled powder is collected to obtain a nanocomposite material. In total, silver 65%, copper oxide 25%, zinc oxide 10%;

S02. The ABS plastic and polyvinyl chloride are pulverized and refined to 200 mesh to 500 mesh powder; the weight ratio of ABS plastic and polyvinyl chloride is 1:2.

S04. Mix the nanocomposite material suspension obtained in step S03 with the ABS plastic and polyvinyl chloride mixed powder obtained in step S02 at high speed and mix uniformly, so that the dispersed nanocomposite particles are attached and wrapped in the ABS plastic and polyvinyl chloride mixed powder Particle surface: 98% of ABS plastic and polyvinyl chloride mixed powder, 2% of sterilizing nanocomposite;

S05. Adopt air energy heat pump dryer, after 24 hours of drying, use screw extruder to melt the mixed powder and granulate into plastic masterbatch.

Example 6

S01. Weaving and rolling metallic silver, copper, and zinc wires into metal rods, using the composite metal rod as the anode conductor of the DC power supply, and the arc formed with the cathode, vaporizes and evaporates the tip of the composite metal rod as the anode conductor. Smoke-like metal atom clusters, silver metal atoms, copper, zinc, and oxygen atoms are fully mixed to form a gaseous alloy; the gaseous alloy is cooled by air flow to collect the cooled powder to obtain a nanocomposite material, which is calculated by weight percentage , Silver 60%, copper oxide 20%, zinc oxide 20%;

S02. Crush the polystyrene to a powder of 200 mesh to 500 mesh;

S03. Disperse the nanocomposite material obtained in step S01 in water, and work at a lower frequency first. The program is set to proceed from low frequency to high frequency 40K—60K—80K—100K—120K in sequence, and the working time of each frequency is 5 minutes. Then, from high frequency to low frequency, two cycles are carried out, the total time is 100min. Obtain a nanocomposite material suspension; gradually disperse the soft agglomerates and present independent nanoparticles;

S04. Stir the nanocomposite material suspension obtained in step S03 with the polystyrene powder obtained in step S02 at high speed and mix uniformly, so that the dispersed nanocomposite material particles adhere and wrap on the surface of the polystyrene powder particles; wherein the polystyrene powder 99%, sterilization nanocomposite material 1%;

Any nanocomposite material obtained in step S01 of Examples 1 to 6. The magnification of 1,300 times, 10,000 times and 100,000 times by scanning electron microscopy results in Figure 2A~2C, as shown in the figure: The nanocomposite material forms a soft aggregate of 40 microns, with a particle size of 30nm~50nm It is composed of fine particles of silver, copper oxide, and zinc oxide.

The plastic master batches of Examples 1 to 6 were formed into a film on a plastic plate to form a sterilization film with a thickness of less than 50 microns, and the plastic plate covering the sterilization film was subjected to blister processing to form a refrigerator inner liner part.

The high-density polypropylene plastic sheet that was not covered with the sterilization film was subjected to blister processing to form a refrigerator inner liner part, and Comparative Example 1 was obtained.

According to GB/T31402-2015, the antibacterial performance of the refrigerator liner components is shown in Table 1:

Table 1

After testing, we found that Examples 1 to 6 have good antibacterial performance, with an antibacterial rate greater than 99%. The plastic masterbatch of the present invention has been tested by an authoritative organization and the number of viable bacteria obtained after inoculation for 24 hours is less than 1cfu/cm2. The number of residual bacteria on the surface is almost 0, and the sterilization rate is close to 100%.

Industrial applicability

In summary, the sterilization plastic masterbatch of the present invention is composed of 20% to 80% silver, 10% to 50% copper oxide, and 10% to 50% zinc oxide composite particles, which are prepared by gasification, evaporation, mixing and cooling The nanocomposite material has stronger bactericidal and anti-mildew abilities than the existing natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents, and is compatible with the technological requirements of plastic processing. In the preparation method of the sterilization plastic master batch of the present invention, the nano composite material adopts the nano composite material prepared by gasification, evaporation, mixing and cooling, does not require acid, alkali and other chemical raw materials, and has no waste water, waste gas, waste residue and other pollutants; The process is simple and controllable, energy consumption is low, and large-scale production is convenient; the cleanliness of the product is high, and the quality is guaranteed. The preparation method of the sterilization plastic masterbatch of the present invention pulverizes ordinary plastic particles to form plastic powder. Through the miniaturization of the plastic material particles, it is beneficial to the uniform distribution of nano materials in the plastic system, and further improves the sterilization of nano materials. Effect. The preparation method of the sterilization plastic master batch of the present invention uses a frequency conversion ultrasonic device to de-agglomerate the nano material to ensure that the nano material can be dispersed. The bactericidal plastic master batch of the present invention is a finished product plastic particle of a conventional size, which is beneficial to downstream production and application, and realizes technically seamless docking.

Sequence Listing Free Content

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A sterilization plastic masterbatch, characterized in that, the sterilization plastic masterbatch comprises the following components by weight percentage:

Plastic powder 95~99%,

Sterilizing nanocomposite materials 1~5%,

The sterilization nanocomposite material is composed of fine particles with a particle size of 30nm-50nm, and the content is 20%-80% silver, 10%-50% copper oxide, and 10%-50% zinc oxide in terms of weight percentage.
The sterilization plastic master batch according to claim 1, wherein the sterilization nanocomposite material is composed of composite particles of 70% silver, 15% copper oxide, and 15% zinc oxide in terms of weight percentage.
The sterilization plastic master batch according to claim 1, wherein the sterilization nanocomposite material is composed of composite particles of 75% silver, 10% copper oxide, and 15% zinc oxide in terms of weight percentage.
The sterilization plastic masterbatch according to claim 1, wherein the sterilization nanocomposite material is composed of composite particles of 80% silver, 10% copper oxide, and 10% zinc oxide in terms of weight percentage.
The sterilization plastic master batch according to claim 1, wherein the sterilization nanocomposite material is composed of composite particles of silver 65%, copper oxide 25%, and zinc oxide 10% in terms of weight percentage.
The sterilization plastic master batch according to claim 1, wherein the sterilization nanocomposite material is composed of composite particles of 60% silver, 20% copper oxide, and 20% zinc oxide in terms of weight percentage.
The sterilization plastic master batch according to claim 1, wherein the material of the plastic powder is one or more of polyethylene, polypropylene, polystyrene, polyvinyl chloride, and ABS plastic.
The sterilization plastic master batch according to claim 7, wherein the material of the plastic powder is a mixed powder of high-density polypropylene and high-density polyethylene, and the weight of the high-density polypropylene and high-density polyethylene The ratio is 1:1.
The sterilization plastic master batch according to claim 7, wherein the material of the plastic powder is a mixed powder of ABS plastic and polyvinyl chloride, and the weight ratio of ABS plastic and polyvinyl chloride is 1:2.
The sterilization plastic master batch according to claim 1, wherein the particle size of the plastic powder is 200 mesh to 500 mesh.
A method for preparing sterilization plastic masterbatch, which is characterized in that it comprises the following steps:

S01. Weaving and calendering metallic silver, copper, and zinc wires into metal wire rods, through vaporization, evaporation, mixing, and cooling to prepare nanocomposite materials, wherein, by weight percentage, silver 20%~80%, copper oxide 10%~ 50%, zinc oxide 10%~50%;

S02. Crush ordinary plastic particles to form plastic powder;

S03: Disperse the nanocomposite material obtained in step S01 in water, and use ultrasonic dispersion to obtain a nanomaterial suspension;

S04. Stir the nano material suspension obtained in step S03 and the plastic powder obtained in step S02 at a high speed, and mix them uniformly;

S05, drying, extruding and granulating to obtain sterilized plastic masterbatch.
The method for preparing a sterile plastic masterbatch according to claim 11, wherein the step S01 specifically comprises: braiding and calendering metallic silver, copper, and zinc wires into a metal wire rod, and using the composite metal wire rod as The arc formed by the anode conductor of the DC power supply and the cathode vaporizes and evaporates the tip of the composite metal wire rod as the anode conductor, producing a smoke-like metal atom group. The silver metal atom is fully mixed with copper, zinc, and oxygen atoms to form a gaseous alloy. ; Use air flow to cool the gaseous alloy, and collect the cooled powder to obtain a nanocomposite material.
The method for preparing a sterile plastic masterbatch according to claim 12, wherein the nanocomposite material obtained in step S01 forms a soft aggregate of 40 microns.
The method for preparing a sterile plastic masterbatch according to claim 11, characterized in that, in the S02, ordinary plastic particles are pulverized to form a plastic powder, and the particle size of the plastic powder is 200 mesh to 500 mesh. Item.
The method for preparing a sterile plastic masterbatch according to claim 11, wherein the step S03 disperses the nanocomposite material obtained in step S01 in water, and the use of ultrasonic dispersion is specifically the use of variable frequency ultrasonic equipment to combine the nano The material is repeatedly impacted and dispersed at an ultrasonic frequency of 40K~120K.
The method for preparing a sterile plastic masterbatch according to claim 15, wherein the step S03 disperses the nanocomposite material obtained in step S01 in water, and first uses a lower frequency ultrasonic dispersion, and the program is set to From low frequency to high frequency 40K—60K—80K—100K—120K sequentially, and then from high frequency to low frequency, repeat several cycles.
The method for preparing a sterile plastic masterbatch according to claim 16, characterized in that in the step S03, the nanocomposite material obtained in step S01 is dispersed in water, first using a lower frequency ultrasonic dispersion, and the program is set to From low frequency to high frequency 40K—60K—80K—100K—120K, the dispersion time is 5 minutes, and then from high frequency to low frequency, repeat 2 cycles.
The method for preparing a sterile plastic masterbatch according to claim 11, wherein the step S05 is specifically using an air energy heat pump dryer, drying for 24 hours, and using a screw extruder to melt the mixed powder into Granules are formed into plastic masterbatch.
An application of the bactericidal plastic masterbatch according to claim 1 in plastic products.
The application of the antiseptic plastic masterbatch in plastic products according to claim 19, which is characterized by being used as an antiseptic film on the surface of the plastic inner liner of a refrigerator.
The application of the antiseptic plastic masterbatch in plastic products according to claim 20, which is characterized in that it is used as a sterilization of the surface of the interior decoration board in the clean space of medical operating rooms and wards, food and drug production plants, and high-tech electronic product production workshops. membrane.