CN111171447B - Bactericidal plastic master batch and preparation method and application thereof - Google Patents
Bactericidal plastic master batch and preparation method and application thereof Download PDFInfo
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- C08K2201/011—Nanostructured additives
Abstract
The invention discloses a bactericidal plastic master batch, a preparation method and application thereof, wherein the bactericidal plastic master batch comprises the following components in percentage by weight: 95-99% of plastic powder and 1-5% of bactericidal nano composite material; the bactericidal nano composite material consists of fine particles with the particle size of 30-50 nm, and comprises, by weight, 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide. The plastic master batch finished product is detected by an authority organization, and the viable count of the plastic master batch finished product is less than 1cfu/cm after being placed for 24 hours after inoculation2The number of bacteria remaining on the surface was almost 0, and the sterilization rate was close to 100%.
Description
Technical Field
The invention belongs to the technical field of new plastic materials, and particularly relates to a sterilization plastic master batch, and a preparation method and application thereof.
Background
Since plastic has the characteristics of easy molding, light weight, stable acid and alkali resistance and the like, the plastic is widely used as a manufacturing raw material of various daily necessities. However, the plastic has the natural defect that the surface is easy to grow bacterial and mold, and is a nutrient source for the growth and propagation of microorganisms.
For this reason, countless people try to adopt a method of adding various antibacterial materials, and hopefully, this problem can be solved. However, due to the performance limitation of the antibacterial material, the existing antibacterial plastic can only achieve bacteriostasis and cannot achieve sterilization.
The types of antibacterial materials are classified into natural antibacterial agents, organic antibacterial agents and inorganic antibacterial agents. Internationally, organic antibacterial agents of chemical industry macros such as DuPont in the United states and silver ion inorganic antibacterial agents proposed by companies such as textile ceramic industry in Japan are mainly available; in China, the scale-up antibacterial agent industry is lacked, and occasionally, cases of adopting nano silver as a sterilizing material appear, but the industrialization is difficult to realize due to the influence of factors such as the productivity of the nano material, downstream application technology, cost and the like.
From the household appliance industry with the most urgent practical requirements, the existing national standard GB/T31402-2015 test method for the antibacterial performance of plastic surfaces for antibacterial plastics only detects the antibacterial effect and does not detect sterilization. Even the great head of the household appliance industries of the Haixin volume sound, the Panasonic city, the Haier and the like of the standard participating in the establishment unit can not provide high-performance sterilization plastic products.
CN105562702B discloses a copper-silver alloy nano functional material and a preparation method and application thereof, the patent can form an alloy in the range of the extremely large component proportion of copper and silver, and the copper-silver nano functional metal material can be directly used as a sterilization and antibacterial material and also can be used as a quantum dot material for capturing light energy. The preparation of the copper-silver nano functional material with uniform particle size and good dispersibility is realized based on a process of reflux reduction and mixed quenching, and the process requires that on one hand, after a proper reaction solution system is designed, the concentrations of a proper surfactant, a complexing agent and a reduction protective agent are adopted, and a copper-silver mixed solution is introduced at a certain temperature to carry out a reflux reduction method, so that the controllable cooperative reduction of copper and silver elements is realized. On the other hand, by the mixed quenching process, the precise control of the reduction reaction termination and the limitation of non-uniform nucleation and growth of particles are realized. The two processes are matched with each other, and one of the processes is not necessary. The process of the copper-silver nano functional material is complex and is not beneficial to large-scale production.
Disclosure of Invention
Based on the above, the invention provides a bactericidal plastic master batch, a preparation method and application thereof, and aims to provide a bactericidal plastic master batch, wherein 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide compound particles are adopted to form a bactericidal nanocomposite material, the nanocomposite material is prepared by gasification evaporation, mixing and cooling, the production process is simple and controllable, and the large-scale production is facilitated; compared with the existing natural antibacterial agent, organic antibacterial agent and inorganic antibacterial agent, the antibacterial and mildewproof agent has stronger sterilization and mildewproof capabilities, and the effects that the residual number of bacteria on the surface is almost 0 and the sterilization rate is close to 100 percent are achieved by adding a small amount of nano composite material.
In order to achieve the purpose, the invention adopts the technical scheme that: the bactericidal plastic master batch is characterized by comprising the following components in percentage by weight:
95-99% of plastic powder,
1-5% of bactericidal nano composite material,
the grain diameter of the bactericidal nano composite material is 30-50 nm, and the bactericidal nano composite material comprises, by weight, 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide.
The technical scheme for further improving the technical scheme of the sterilizing plastic master batch is as follows:
1. in the technical scheme, the bactericidal nano composite material consists of 70% of silver, 15% of copper oxide and 15% of zinc oxide.
2. In the technical scheme, the bactericidal nano composite material consists of 75% of silver, 10% of copper oxide and 15% of zinc oxide by weight percentage.
3. In the technical scheme, the bactericidal nano composite material consists of 80 wt% of silver, 10 wt% of copper oxide and 10 wt% of zinc oxide.
4. In the technical scheme, the bactericidal nano composite material consists of 65% of silver, 25% of copper oxide and 10% of zinc oxide by weight percentage.
5. In the technical scheme, the bactericidal nano composite material consists of, by weight, 60% of silver, 20% of copper oxide and 20% of zinc oxide.
6. In the technical scheme, the plastic powder is made of one or more of polyethylene, polypropylene, polystyrene, polyvinyl chloride and ABS plastic.
7. In the technical scheme, the plastic powder is made of mixed powder of high-density polypropylene and high-density polyethylene, and the weight ratio of the high-density polypropylene to the high-density polyethylene is 1: 1.
8. In the technical scheme, the plastic powder is made of mixed powder of ABS plastic and polyvinyl chloride, and the weight ratio of the ABS plastic to the polyvinyl chloride is 1: 2.
9. In the technical scheme, the particle size of the plastic powder is 200-500 meshes.
The technical scheme adopted by the invention is as follows: a preparation method of the bactericidal plastic master batch comprises the following steps:
s01, weaving and rolling metal silver, copper and zinc wires into metal wire rods, and preparing the nano composite material through gasification evaporation, mixing and cooling, wherein the nano composite material comprises, by weight, 20% -80% of silver, 10% -50% of copper oxide and 10% -50% of zinc oxide;
s02, crushing common plastic particles to form plastic powder;
s03, dispersing the nano composite material obtained in the step S01 in water, and performing ultrasonic dispersion to obtain a nano material suspension;
s04, stirring the nanometer material suspension obtained in the step S03 and the plastic powder obtained in the step S02 at a high speed, and uniformly mixing;
and S05, drying, extruding and granulating to obtain the bactericidal plastic master batch.
The technical scheme of the further improvement in the technical scheme of the method is as follows:
1. in the above technical solution, the step S01 specifically includes: the step S01 specifically includes: weaving and rolling metal silver, copper and zinc wires into a metal wire rod, taking the composite metal wire rod as an anode conductor of a direct-current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod serving as the anode conductor is gasified and evaporated to generate a smog-shaped metal atomic group, and silver metal atoms are fully mixed with copper, zinc and oxygen atoms to form a gaseous alloy; and cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material.
2. In the above technical solution, the nanocomposite prepared in step S01 forms soft agglomerates of 40 microns.
3. In the above technical solution, in S02, common plastic particles are pulverized to form plastic powder, and the particle size of the plastic powder is 200-500 meshes.
4. In the above technical solution, the step S03 is to disperse the nanocomposite obtained in the step S01 in water, add an auxiliary agent, and perform ultrasonic dispersion, specifically, to repeatedly impact and disperse the nanocomposite at an ultrasonic frequency of 40K to 120K by using a variable frequency ultrasonic device.
5. In the above technical solution, the step S03 is to disperse the nanocomposite obtained in the step S01 in water, and the ultrasonic dispersion is performed at a low frequency, and the program is set to be 40K to 60K to 80K to 100K to 120K from a low frequency to a high frequency, and then the process is repeated for several cycles from the high frequency to the low frequency.
6. In the above technical solution, the method is characterized in that the step S03 is to disperse the nanocomposite obtained in the step S01 in water, and the ultrasonic dispersion is performed at a low frequency, and the program is set to be performed sequentially from a low frequency to a high frequency of 40K-60K-80K-100K-120K, wherein the dispersion time is 5min, and then repeated for 2 cycles from the high frequency to the low frequency.
7. In the above technical scheme, the step S05 is specifically to adopt an air energy heat pump dryer, dry for 24 hours, melt and granulate the mixed powder with a screw extruder, and form the plastic masterbatch.
The application of the bactericidal plastic master batch in plastic products.
1. In the technical scheme, the application of the sterilization plastic master batch in plastic products can be specifically made into a sterilization film which is used on the surface of the plastic inner container of the refrigerator and plays a role in sterilization.
2. In the technical scheme, the sterilization plastic master batch can be applied to plastic products, particularly can be made into a sterilization film, is used for the surfaces of internal decorative plates in clean spaces of medical operating rooms, sickrooms, food and drug production plants and high-tech electronic product production workshops, and plays a role in sterilization.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the bactericidal plastic master batch disclosed by the invention is formed by adopting composite particles of 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide in plastic powder, has stronger bactericidal and mildew-proof capabilities than the existing natural antibacterial agent, organic antibacterial agent and inorganic antibacterial agent, and is compatible with the process requirements of plastic processing.
2. In the preparation method of the bactericidal plastic master batch, the nano composite material is prepared by gasification evaporation, mixing and cooling, chemical raw materials such as acid and alkali are not needed, and pollutants such as waste water, waste gas and waste residue are avoided; the production process is simple and controllable, the energy consumption is low, and the large-scale production is facilitated; the product cleanliness is high, and the quality is guaranteed.
3. The preparation method of the bactericidal plastic master batch provided by the invention has the advantages that the common plastic particles are crushed to form plastic powder, and the plastic material particles are subjected to fine processing, so that the uniform distribution of the nano composite material in a plastic system is facilitated, and the bactericidal effect of the nano composite material is further improved.
4. The preparation method of the bactericidal plastic master batch uses frequency conversion ultrasonic equipment to deagglomerate the nano material so as to ensure that the dispersion of the nano composite material can be realized, the nano composite material is added into the plastic powder, and the nano composite material is uniformly distributed in the plastic matrix, so that the plastic master batch ensures that the plastic product prepared by the plastic master batch has the distribution of the nano composite material in the whole area, and the plastic product has complete bactericidal effect.
5. The sterilization plastic master batch is a finished product plastic particle with a conventional size, is beneficial to downstream production and application, and realizes seamless butt joint technically.
6. The sterilization plastic master batch is subjected to detection and inoculation by an authority mechanism and then is placed for 24 hours to obtain the sterilization plastic master batch with the viable count of less than 1cfu/cm2The number of bacteria remaining on the surface was almost 0, and the sterilization rate was close to 100%.
Drawings
FIG. 1 is a flow chart of the preparation method of the bactericidal plastic master batch of the invention.
Fig. 2A to 2C are magnified pictures of the bactericidal plastic masterbatch of example 1 of the present invention at a magnification of one thousand three hundred times, ten thousand times and one hundred thousand times by a scanning electron microscope.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a flow chart of a method for preparing the bactericidal plastic master batch of the present invention, and the following describes an embodiment of the present invention in detail with reference to fig. 1.
Example 1
A preparation method of the bactericidal plastic master batch comprises the following steps:
s01, weaving and rolling metallic silver, copper and zinc wires into a metal wire rod, using the composite metal wire rod as an anode conductor of a direct current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and the silver metal atoms are fully mixed with the copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 70% of silver, 15% of copper oxide and 15% of zinc oxide in percentage by weight;
s02, crushing and thinning the high-density polypropylene to powder of 200-500 meshes;
s03, dispersing the nano composite material obtained in the step S01 in water, and repeatedly impacting and dispersing the nano composite material for 60min by using variable frequency ultrasonic equipment at the ultrasonic frequency of 40K-120K to obtain a nano composite material suspension;
s04, stirring the nano composite material suspension obtained in the step S03 and the high-density polypropylene powder obtained in the step S02 at a high speed, and uniformly mixing to enable the dispersed nano composite material particles to be attached to and wrapped on the surfaces of the high-density polypropylene powder particles; wherein the high-density polypropylene powder accounts for 96 percent, and the sterilizing nano composite material accounts for 4 percent;
and S05, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the plastic master batch.
Example 2
A preparation method of the bactericidal plastic master batch comprises the following steps:
s01, weaving and rolling metallic silver, copper and zinc wires into a metal wire rod, using the composite metal wire rod as an anode conductor of a direct current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and the silver metal atoms are fully mixed with the copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 70% of silver, 15% of copper oxide and 15% of zinc oxide in percentage by weight;
s02, crushing and thinning the high-density polypropylene and the high-density polyethylene into powder of 200-500 meshes; the weight ratio of the high-density polypropylene to the high-density polyethylene is 1: 1.
S03, dispersing the nano composite material obtained in the step S01 in water, adding coloring titanium dioxide, and repeatedly impacting and dispersing the nano composite material for 60min by using frequency conversion ultrasonic equipment at the ultrasonic frequency of 40K-120K to obtain a nano composite material suspension;
s04, stirring the nano composite suspension obtained in the step S03 and the mixed powder of the high-density polypropylene and the high-density polyethylene obtained in the step S02 at a high speed, and uniformly mixing to enable the dispersed nano composite particles to be attached to and wrapped on the surfaces of the mixed powder particles of the high-density polypropylene and the high-density polyethylene; wherein the mixed powder of the high-density polypropylene and the high-density polyethylene accounts for 96 percent, the sterilizing nano composite material accounts for 2 percent, and the coloring titanium dioxide accounts for 2 percent;
and S05, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the plastic master batch.
Example 3
A preparation method of the bactericidal plastic master batch comprises the following steps:
s01, weaving and rolling metallic silver, copper and zinc wires into a metal wire rod, using the composite metal wire rod as an anode conductor of a direct current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and the silver metal atoms are fully mixed with the copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 75% of silver, 10% of copper oxide and 15% of zinc oxide in percentage by weight;
s02, crushing and thinning the high-density polyethylene to powder of 200-500 meshes;
s03, dispersing the nano composite material obtained in the step S01 in water, adding coloring titanium dioxide, and repeatedly impacting and dispersing the nano composite material for 60min by using frequency conversion ultrasonic equipment at the ultrasonic frequency of 40K-120K to obtain a nano composite material suspension;
s04, stirring the suspension obtained in the step S03 and the high-density polyethylene powder obtained in the step S02 at a high speed, uniformly mixing, and attaching and wrapping the dispersed nano composite material particles on the surfaces of the high-density polyethylene powder particles, wherein the high-density polyethylene powder accounts for 98%, the sterilizing nano composite material accounts for 1%, and the coloring titanium dioxide accounts for 1%;
and S05, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the plastic master batch.
Example 4
A preparation method of the bactericidal plastic master batch comprises the following steps:
s01, weaving and rolling metallic silver, copper and zinc wires into a metal wire rod, using the composite metal wire rod as an anode conductor of a direct current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and the silver metal atoms are fully mixed with the copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 80% of silver, 10% of copper oxide and 10% of zinc oxide in percentage by weight;
s02, crushing and thinning the polyvinyl chloride into powder of 200-500 meshes;
s03, dispersing the nano composite material obtained in the step S01 in water, and repeatedly impacting and dispersing the nano composite material for 60min by using variable frequency ultrasonic equipment at the ultrasonic frequency of 40K-120K to obtain a composite nano material suspension;
s04, stirring the nano composite material suspension obtained in the step S03 and the polyvinyl chloride powder obtained in the step S02 at a high speed, and uniformly mixing to enable dispersed nano composite material particles to be attached to and wrapped on the surfaces of the polyvinyl chloride powder particles; wherein the polyvinyl chloride powder accounts for 98 percent, and the sterilizing nano composite material accounts for 2 percent;
and S05, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the plastic master batch.
Example 5
A preparation method of the bactericidal plastic master batch comprises the following steps:
s01, weaving and rolling metallic silver, copper and zinc wires into a metal wire rod, using the composite metal wire rod as an anode conductor of a direct current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and the silver metal atoms are fully mixed with the copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 65% of silver, 25% of copper oxide and 10% of zinc oxide in percentage by weight;
s02, crushing and thinning the ABS plastic and the polyvinyl chloride into powder of 200-500 meshes; the weight ratio of the ABS plastic to the polyvinyl chloride is 1: 2.
S03, dispersing the nano composite material obtained in the step S01 in water, and repeatedly impacting and dispersing the nano composite material for 60min by using variable frequency ultrasonic equipment at the ultrasonic frequency of 40K-120K to obtain a nano composite material suspension;
s04, stirring the nano composite material suspension obtained in the step S03 and the mixed powder of the ABS plastic and the polyvinyl chloride obtained in the step S02 at a high speed, and uniformly mixing to enable dispersed nano composite material particles to be attached to and wrapped on the surfaces of the mixed powder particles of the ABS plastic and the polyvinyl chloride; wherein 98 percent of mixed powder of ABS plastic and polyvinyl chloride and 2 percent of bactericidal nano composite material;
and S05, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the plastic master batch.
Example 6
A preparation method of the bactericidal plastic master batch comprises the following steps:
s01, weaving and rolling metallic silver, copper and zinc wires into a metal wire rod, using the composite metal wire rod as an anode conductor of a direct current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod as the anode conductor is gasified and evaporated to generate a smog-like metal atomic group, and the silver metal atoms are fully mixed with the copper, zinc and oxygen atoms to form a gaseous alloy; cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material, wherein the nano composite material comprises 60% of silver, 20% of copper oxide and 20% of zinc oxide in percentage by weight;
s02, crushing and thinning the polystyrene into powder of 200-500 meshes;
s03, dispersing the nano composite material obtained in the step S01 in water, working at a lower frequency, setting the program to be carried out in sequence from low frequency to high frequency of 40K-60K-80K-100K-120K, wherein the working time of each frequency is 5min, and then carrying out two cycles from high frequency to low frequency in sequence, and the total time is 100 min. Obtaining a nanocomposite suspension; gradually dispersing the soft aggregate to present independent nano particles;
s04, stirring the nano composite material suspension obtained in the step S03 and the polystyrene powder obtained in the step S02 at a high speed, and uniformly mixing to enable the dispersed nano composite material particles to be attached to and wrapped on the surfaces of the polystyrene powder particles; wherein, the polystyrene powder accounts for 99 percent, and the bactericidal nano composite material accounts for 1 percent;
and S05, drying for 24 hours by adopting an air energy heat pump dryer, melting and granulating the mixed powder by using a screw extruder, and preparing the plastic master batch.
Any of the nanocomposites obtained in the step S01 of examples 1-6 was used. Magnified by a scanning electron microscope at one thousand three hundred times, ten thousand times and one hundred thousand times to obtain FIGS. 2A-2C, as shown in the figure: the nano composite material forms a soft aggregate of 40 microns, is composed of fine particles with the particle size of 30 nm-50 nm, and is a compound of silver, copper oxide and zinc oxide.
And (3) preparing the plastic master batches of the embodiments 1 to 6 on a plastic plate to form a sterilization film with the thickness of less than 50 microns, and carrying out plastic suction processing on the plastic plate covered with the sterilization film to prepare the refrigerator liner component.
And (3) carrying out plastic sucking processing on the high-density polypropylene plastic plate which is not covered with the sterilization film to prepare the inner container component of the refrigerator, thus obtaining the comparative example 1.
The antibacterial performance of the refrigerator inner container part detected according to GB/T31402-2015 is shown in Table 1:
TABLE 1
Tests show that the plastic master batch products of the embodiments 1-6 have good antibacterial performance and the antibacterial rate is more than 99%, and the plastic master batch products are tested by an authority mechanism and placed for 24 hours after inoculation to obtain the viable count of less than 1cfu/cm2The number of bacteria remaining on the surface was almost 0, and the sterilization rate was close to 100%.
In conclusion, the bactericidal plastic master batch disclosed by the invention is composed of 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide composite particles, and the nano composite material prepared by gasification evaporation, mixing and cooling has stronger bactericidal and mildew-proof capabilities compared with the existing natural antibacterial agent, organic antibacterial agent and inorganic antibacterial agent, and is compatible with the process requirements of plastic processing. In the preparation method of the bactericidal plastic master batch, the nano composite material is prepared by gasification evaporation, mixing and cooling, chemical raw materials such as acid and alkali are not needed, and pollutants such as waste water, waste gas and waste residue are avoided; the production process is simple and controllable, the energy consumption is low, and the large-scale production is facilitated; the product cleanliness is high, and the quality is guaranteed. The preparation method of the bactericidal plastic master batch provided by the invention has the advantages that the common plastic particles are crushed to form plastic powder, and the plastic material particles are subjected to fine processing, so that the uniform distribution of the nano material in a plastic system is facilitated, and the bactericidal effect of the nano material is further improved. The preparation method of the bactericidal plastic master batch uses the frequency conversion ultrasonic equipment to de-agglomerate the nano material so as to ensure that the nano material can be dispersed. The sterilization plastic master batch is a finished product plastic particle with a conventional size, is beneficial to downstream production and application, and realizes technical seamless butt joint.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (19)
1. The preparation method of the bactericidal plastic master batch is characterized by comprising the following steps:
s01, weaving and rolling metal silver, copper and zinc wires into metal wire rods, and preparing the nano composite material through gasification evaporation, mixing and cooling, wherein the nano composite material comprises, by weight, 20% -80% of silver, 10% -50% of copper oxide and 10% -50% of zinc oxide; the prepared nanocomposite forms soft agglomerates of 40 microns;
s02, crushing common plastic particles to form plastic powder;
s03, dispersing the nano composite material obtained in the step S01 in water, and performing ultrasonic dispersion to obtain a nano material suspension; specifically, the nano composite material is repeatedly impacted and dispersed by frequency conversion ultrasonic equipment at the ultrasonic frequency of 40K-120K;
s04, stirring the nanometer material suspension obtained in the step S03 and the plastic powder obtained in the step S02 at a high speed, and uniformly mixing;
and S05, drying, extruding and granulating to obtain the bactericidal plastic master batch.
2. The method for preparing the bactericidal plastic masterbatch according to claim 1, wherein the step S01 specifically comprises: weaving and rolling metal silver, copper and zinc wires into a metal wire rod, taking the composite metal wire rod as an anode conductor of a direct-current power supply, and forming an electric arc with a cathode, so that the tip of the composite metal wire rod serving as the anode conductor is gasified and evaporated to generate a smog-shaped metal atomic group, and silver metal atoms are fully mixed with copper, zinc and oxygen atoms to form a gaseous alloy; and cooling the gaseous alloy by using air flow, and collecting the cooled powder to obtain the nano composite material.
3. The method for preparing the bactericidal plastic master batch according to claim 1, wherein common plastic particles are crushed to form plastic powder in S02, and the particle size of the plastic powder is 200-500 meshes.
4. The method of claim 1, wherein the step S03 is performed by dispersing the nanocomposite obtained in the step S01 in water, performing ultrasonic dispersion at a low frequency, and performing a procedure of 40K-60K-80K-100K-120K from a low frequency to a high frequency, and repeating the procedure from the high frequency to the low frequency for several cycles.
5. The method of claim 4, wherein the step S03 is performed by dispersing the nanocomposite obtained in the step S01 in water, performing ultrasonic dispersion with a lower frequency, and performing the procedure of 40K-60K-80K-100K-120K from a low frequency to a high frequency for 5min, and repeating the procedure from the high frequency to the low frequency for 2 cycles.
6. The method for preparing the bactericidal plastic masterbatch of claim 1, wherein the step S05 is specifically to adopt an air-source heat pump dryer, dry the mixture for 24 hours, melt and granulate the mixed powder with a screw extruder, and form the plastic masterbatch.
7. The bactericidal plastic master batch prepared by the preparation method of any one of claims 1 to 6, which is characterized by comprising the following components in percentage by weight:
95-99% of plastic powder,
1-5% of bactericidal nano composite material,
the bactericidal nano composite material consists of fine particles with the particle size of 30-50 nm, and comprises, by weight, 20-80% of silver, 10-50% of copper oxide and 10-50% of zinc oxide.
8. The bactericidal plastic masterbatch of claim 7, wherein the bactericidal nanocomposite comprises, by weight, 70% silver, 15% copper oxide, and 15% zinc oxide composite particles.
9. The bactericidal plastic masterbatch of claim 7, wherein the bactericidal nanocomposite comprises, by weight, 75% silver, 10% copper oxide, and 15% zinc oxide composite particles.
10. The bactericidal plastic masterbatch of claim 7, wherein the bactericidal nanocomposite comprises 80% by weight of silver, 10% by weight of copper oxide, and 10% by weight of zinc oxide.
11. The bactericidal plastic masterbatch of claim 7, wherein the bactericidal nanocomposite comprises, by weight, 65% silver, 25% copper oxide, and 10% zinc oxide composite particles.
12. The bactericidal plastic masterbatch of claim 7, wherein the bactericidal nanocomposite comprises, by weight, 60% silver, 20% copper oxide, and 20% zinc oxide composite particles.
13. The bactericidal plastic masterbatch of claim 7, wherein the plastic powder is made of one or more of polyethylene, polypropylene, polystyrene, polyvinyl chloride, and ABS plastic.
14. The bactericidal plastic master batch as claimed in claim 13, wherein the plastic powder is a mixed powder of high density polypropylene and high density polyethylene, and the weight ratio of the high density polypropylene to the high density polyethylene is 1: 1.
15. The bactericidal plastic master batch as claimed in claim 13, wherein the plastic powder is a mixed powder of ABS plastic and polyvinyl chloride, and the weight ratio of the ABS plastic to the polyvinyl chloride is 1: 2.
16. The bactericidal plastic masterbatch of claim 7, wherein the particle size of the plastic powder is 200-500 meshes.
17. The use of the bactericidal plastic masterbatch of claim 7 in plastic products.
18. The use of the masterbatch of claim 17 in plastic products, wherein the masterbatch of claim is used as a sterilization film on the surface of a plastic inner container of a refrigerator.
19. The use of the masterbatch of claim 18 in plastic products, wherein the masterbatch is used as a bactericidal film on the surface of an interior decoration board in clean spaces of medical operating rooms and wards, food and drug manufacturing plants, and high-tech electronic product manufacturing plants.
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| CN112431037A (en) * | 2020-11-19 | 2021-03-02 | 江苏国信复合材料科技股份有限公司 | Preparation method of mildew-proof automobile leather |
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Address after: Building 101, No. 7 Datian Yangnan 1st Road, Dongfang Community, Songgang Street, Bao'an District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Jiean nano composite material Co.,Ltd. Address before: Room 405, building e, hongrongfa Industrial Park, 460 Xiangshan Avenue, Luotian community, Yanluo street, Bao'an District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen Jiean nano composite material Co.,Ltd. |