CN109910412B - Rapidly-degradable antibacterial plastic film and preparation method thereof - Google Patents
Rapidly-degradable antibacterial plastic film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a fast-degradable antibacterial plastic film and a preparation method thereof, wherein the fast-degradable antibacterial plastic film comprises an upper surface layer, a lower surface layer and an intermediate layer; the raw materials for preparing the upper and lower surface layers of the rapidly degradable antibacterial plastic film comprise: ethylene-ethyl acrylate copolymer, polyvinyl alcohol, quartz glass, alpha crystal nucleated sorbitol; the raw materials for preparing the rapidly degradable antibacterial plastic film intermediate layer comprise: ethylene-ethyl acrylate copolymer, polyvinyl alcohol, quartz glass, alpha crystal form nucleated sorbitol, a stabilizer and an up-conversion luminescent material; by adopting the preparation method, all the raw materials are matched with each other, and the prepared rapidly-degradable antibacterial plastic film material is green and environment-friendly, can be rapidly degraded and has efficient antibacterial effect; the preparation method is simple and can be widely applied.
Description
Technical Field
The invention relates to the field of film production and processing, in particular to a rapidly-degradable antibacterial plastic film and a preparation method thereof.
Background
With the development of science and technology and the progress of times, the traditional glass material is gradually replaced by plastic products due to the defects of heavy weight, easy breakage and the like. Plastic packages and plastic package products have a larger share in the market, and particularly, composite plastic flexible packages are widely applied to the fields of food, medicine, chemical industry, agriculture and the like, wherein agricultural films and plastic for food packaging have a larger proportion, such as plastic greenhouses, plastic lunch boxes, plastic bags and the like, and the products bring great convenience to the life of people. But the plastic film has excellent sealing performance, so when the plastic film is used for food packaging, the food is easy to breed bacteria and even mildew; and the hardness and the wear resistance of glass materials are not available, and the existing plastic film has poor light transmission due to the thickness problem or poor quality, so that the plastic film which can transmit light, resist bacteria and be rapidly degraded is prepared to meet the requirements of daily life or agricultural and other industry development on the plastic film.
The invention patent of Chinese patent CN103589153A provides a preparation method of an antibacterial composite film material, which relates to the field of plastic films and comprises five process procedures of raw material mixing, polyamide acid/precursor preparation, film paving, composite film preparation and drying, wherein the preparation method adopts a hydrothermal method to prepare sol, avoids the step that a hydroxide is converted into an oxide through calcination by a wet chemical method to easily form hard clusters, does not generate other impurities or derivative substances, the film paving process has the advantages of high film generation speed, good film quality, high mechanical strength and difficult breaking by strictly controlling the temperature and the heat preservation time in an oven, the prepared composite film has excellent performance, has a local net distribution structure, excellent physical performance and dielectric performance and obvious corona resistance effect, and completely meets the requirement on cable insulation performance in the power industry, the service life is long, and the stability of the production process is good; in the invention, the antibacterial effect is realized by adding the antibacterial compound into the raw materials, the antibacterial effect cannot be long, and meanwhile, the 4, 4' -diaminodiphenyl ether and the like added into the raw materials have great harm to human health and environmental safety.
The invention patent of Chinese patent CN104292783A provides a degradable agricultural plastic film and a preparation method thereof, and the components and the mass fractions of the components are as follows: 10-30 parts of polyhydroxyvalerate, 12-25 parts of polycaprolactone, 5-10 parts of starch, 5-10 parts of cellulose, 2-5 parts of plasticizer, 1-3 parts of coupling agent and 1-3 parts of antioxidant. Also comprises 10-20 parts of amino acid. The coating also comprises 1-6 parts of sodium phosphate and 2-5 parts of ammonium sulfate. The plasticizer is dimethyl phthalate or dioctyl phthalate. The coupling agent is vinyl triethoxysilane or triisostearoyl titanate. The antioxidant is antioxidant 1010 or antioxidant 1076. The agricultural plastic film prepared by the method has high biodegradability and short degradation time, and the degradation rate can reach 99% in 2 months; the raw materials of the invention are added with various raw materials, and the biodegradation is accelerated by amino acid, starch, cellulose, sodium phosphate and the like, so the production cost is higher, and the invention is not beneficial to wide application.
In order to solve the problems of high preparation cost, unstable product quality and difficult degradation of the existing plastic film, the plastic film which has simple process and low production cost, can realize quick degradation and high-efficiency antibiosis is provided.
Disclosure of Invention
The invention mainly aims to provide a rapidly-degradable antibacterial plastic film and a preparation method thereof, and aims to solve the problems of high preparation cost and unstable product quality of the plastic film in the prior art.
In order to achieve the purpose, the invention provides a rapidly-degradable antibacterial plastic film which comprises an upper surface layer, a lower surface layer and a middle layer, wherein the raw materials for preparing the upper surface layer and the lower surface layer of the rapidly-degradable antibacterial plastic film comprise, by weight, 40-50 parts of ethylene-ethyl acrylate copolymer, 20-40 parts of polyvinyl alcohol, 2-4 parts of quartz glass and 10-15 parts of α crystal form nucleated sorbitol, the raw materials for preparing the middle layer of the rapidly-degradable antibacterial plastic film comprise, by weight, 40-50 parts of ethylene-ethyl acrylate copolymer, 20-40 parts of polyvinyl alcohol, 2-4 parts of quartz glass, 10-15 parts of α crystal form nucleated sorbitol, 1-1.5 parts of stabilizer and 1-2 parts of up-conversion luminescent material, the stabilizer is one or a combination of nano carbon powder and resorcinol monobenzoate, and the up-conversion luminescent material is Yb doped3+/Er3+Or Yb3+/Tm3+The nanoparticles of (1); the nano particles are NaYF4、Y2O3And NaF2Any one or combination thereof.
Further, the raw materials for preparing the upper surface layer and the lower surface layer of the rapidly degradable antibacterial plastic film comprise the following components in parts by weight: 45 parts of ethylene-ethyl acrylate copolymer, 32 parts of polyvinyl alcohol, 3 parts of quartz glass and 12 parts of alpha crystal form nucleated sorbitol; the raw materials for preparing the rapidly degradable antibacterial plastic film intermediate layer comprise the following components in parts by weight: 45 parts of ethylene-ethyl acrylate copolymer, 32 parts of polyvinyl alcohol, 3 parts of quartz glass, 12 parts of alpha crystal form nucleated sorbitol, 1.3 parts of stabilizer and 1.5 parts of up-conversion luminescent material.
Furthermore, the molecular weight of the polyvinyl alcohol is 110000-130000.
Furthermore, the particle size of the nano carbon powder is 20 nm-30 nm.
Further, the quartz glass is pulverized to 300 to 400 mesh.
According to another object of the present invention, there is provided a method for preparing a rapidly degradable antibacterial plastic film, comprising the steps of:
step a, mixing the polyvinyl alcohol and water in parts by weight according to a mass ratio of 4-5: 1, uniformly stirring to obtain a polyvinyl alcohol solution;
b, adding the ethylene-ethyl acrylate copolymer, alpha crystal form nucleated sorbitol and quartz glass into a high-speed rotary mixer, mixing for 1-2 h at the temperature of 130-145 ℃ and the rotating speed of 1500-2000 r/min, adding the polyvinyl alcohol solution, and continuously mixing for 0.5h to obtain a mixture;
c, dividing the mixture obtained in the step b into A, B, C three groups, respectively adding the mixture into No. 1, No. 2 and No. 3 hoppers of an extruder at the temperature of 150-185 ℃, respectively rotating screws of the extruder at the rotating speed of 200-300 r/min, respectively fusing, passing through a shunt channel, and simultaneously extruding at the temperature of 160-175 ℃ through a 2800mm automatic flat-mouth die head;
and d, after extrusion, cooling to 15-20 ℃ through a casting cooling system, carrying out corona treatment, and cutting edges and rolling to obtain the rapidly-degraded antibacterial plastic film.
Further, in the step a, the stirring conditions are specifically as follows: stirring for 5-10 min under the ultrasonic condition and the temperature of 65-75 ℃.
Further, in step c, the stabilizer and the up-conversion luminescent material are added into the hopper No. 2 according to the weight parts.
Furthermore, in the step c, a layer of 30-40 mesh screen is attached to the shunt passage opening.
Further, in the step d, the corona treatment conditions are that the electrode power is 16 kW-18 kW, and the driving motor power is 5.0 kW-5.5 kW.
The invention has the advantages and beneficial effects that:
1. the rapidly degradable antibacterial plastic film is prepared from an ethylene-ethyl acrylate copolymer material with lower cost, and has excellent toughness and stable and reliable quality; the quartz glass and the transparent material are matched, the prepared plastic film can transmit enough ultraviolet light to sterilize the film wrapping substance, so that the antibacterial effect is realized, an antibacterial agent is not required to be added, the sterility of the film wrapping environment can be realized by a physical method, and the effect is long-term and effective;
2. the rapidly degradable antibacterial plastic film prepared by the invention adopts a three-layer co-extrusion preparation method, and the prepared multilayer film has the advantages of good strength, stable structure and high-efficiency antibacterial effect; meanwhile, the stabilizer and the up-conversion luminescent material which are different from the upper surface layer and the lower surface layer are added in the middle layer, so that other impurity light sources can be filtered, stronger ultraviolet light is emitted at the same time, and efficient antibiosis is realized;
3. the rapidly degradable antibacterial plastic film prepared in the application adopts ethylene-ethyl acrylate copolymer and polyvinyl alcohol as raw materials, can be rapidly degraded, reduces pollution to the environment, is green and healthy, and can be widely applied;
4. the invention has simple preparation process and short preparation period, optimizes various preparation parameters, overcomes the difference of raw materials to achieve the required technical effect, and can well coordinate the problems of product quality and cost.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As described in the background section, the existing plastic film is complicated and expensive to prepare, and in order to solve this problem, the present invention provides a rapidly degradable antibacterial plastic film.
Example 1
The raw materials for preparing the upper surface layer and the lower surface layer of the rapidly degradable antibacterial plastic film comprise, by weight, 4000g of ethylene-ethyl acrylate copolymer, 2000g of polyvinyl alcohol, 200g of quartz glass and 1000g of α crystal form nucleated sorbitol, the raw materials for preparing the intermediate layer of the rapidly degradable antibacterial plastic film comprise, by weight, 4000g of ethylene-ethyl acrylate copolymer, 2000g of polyvinyl alcohol, 200g of quartz glass, 1000g of α crystal form nucleated sorbitol, 100g of stabilizer and 100g of up-conversion luminescent material, the stabilizer is nano carbon powder, and the up-conversion luminescent material is Yb-doped Yb3+、Er3+NaYF of4The nanoparticles of (1).
The preparation method comprises the following steps:
step a, mixing the polyvinyl alcohol and water in parts by weight according to a mass ratio of 4: 1, stirring for 5min to be uniform under the ultrasonic condition and the temperature of 65 ℃ to obtain a polyvinyl alcohol solution;
b, adding the ethylene-ethyl acrylate copolymer, alpha crystal form nucleated sorbitol and quartz glass into a high-speed rotating mixer, mixing for 2 hours at the temperature of 130 ℃ and the rotating speed of 1500r/min, adding the polyvinyl alcohol solution, and continuously mixing for 0.5 hour to obtain a mixture;
c, dividing the mixture obtained in the step b into A, B, C three groups, respectively adding the mixture into No. 1, No. 2 and No. 3 hoppers of an extruder at the temperature of 150 ℃, adding the stabilizer and the up-conversion luminescent material in parts by weight into the No. 2 hopper, rotating an extruder screw at the rotating speed of 200r/min, respectively fusing, passing through a shunt channel, and simultaneously extruding at 160 ℃ through a 2800mm automatic flat-opening die head;
and d, after extrusion, cooling to 15 ℃ through a casting cooling system, carrying out corona treatment, and cutting edges and rolling to obtain the rapidly-degradable antibacterial plastic film.
In the above operation, the interlayer ratio of the upper and lower surface layers and the intermediate layer of the rapidly degradable antibacterial plastic film is 1: 2: 2; a 30-mesh screen is attached to the opening of the sub-runner; the corona treatment conditions were 16kW for electrode power and 5.0kW for driving motor power.
Example 2
The raw materials for preparing the upper surface layer and the lower surface layer of the rapidly degradable antibacterial plastic film comprise 5000g of ethylene-ethyl acrylate copolymer, 4000g of polyvinyl alcohol, 400g of quartz glass and 1500g of α crystal form nucleated sorbitol in parts by weight, the raw materials for preparing the intermediate layer of the rapidly degradable antibacterial plastic film comprise 5000g of ethylene-ethyl acrylate copolymer, 4000g of polyvinyl alcohol, 400g of quartz glass, 1500g of α crystal form nucleated sorbitol, 1500g of stabilizer and 200g of up-conversion luminescent material in parts by weight, the stabilizer is resorcinol monobenzoate, and the up-conversion luminescent material is Yb-doped3+、Er3+Y of (A) is2O3The nanoparticles of (1).
The preparation method comprises the following steps:
step a, mixing the polyvinyl alcohol and water in parts by weight according to a mass ratio of 5: 1, stirring for 10min to be uniform under the ultrasonic condition and the environment with the temperature of 75 ℃ to obtain a polyvinyl alcohol solution;
b, adding the ethylene-ethyl acrylate copolymer, alpha crystal form nucleated sorbitol and quartz glass into a high-speed rotating mixer, mixing for 1h at the temperature of 145 ℃ and the rotating speed of 2000r/min, adding the polyvinyl alcohol solution, and continuously mixing for 0.5h to obtain a mixture;
c, dividing the mixture obtained in the step b into A, B, C three groups, respectively adding the mixture into No. 1, No. 2 and No. 3 hoppers of an extruder at the temperature of 185 ℃, adding the stabilizer and the up-conversion luminescent material in parts by weight into the No. 2 hopper, rotating an extruder screw at the rotating speed of 300r/min, respectively fusing, passing through a shunt channel, and simultaneously extruding at 175 ℃ through a 2800mm automatic flat-opening die head;
and d, after extrusion, cooling to 20 ℃ through a casting cooling system, carrying out corona treatment, and cutting edges and rolling to obtain the rapidly-degradable antibacterial plastic film.
In the above operation, the interlayer ratio of the upper and lower surface layers and the intermediate layer of the rapidly degradable antibacterial plastic film is 1: 2: 2; a 40-mesh screen is attached to the opening of the sub-runner; the corona treatment conditions were that the electrode power was 18kW and the driving motor power was 5.5 kW.
Example 3
The raw materials for preparing the upper surface layer and the lower surface layer of the rapidly degradable antibacterial plastic film comprise, by weight, 4200g of ethylene-ethyl acrylate copolymer, 2500g of polyvinyl alcohol, 280g of quartz glass and 1100g of α crystal form nucleated sorbitol, the raw materials for preparing the intermediate layer of the rapidly degradable antibacterial plastic film comprise, by weight, 4200g of ethylene-ethyl acrylate copolymer, 2500g of polyvinyl alcohol, 280g of quartz glass, 1100g of α crystal form nucleated sorbitol, 110g of stabilizer and 140g of up-conversion luminescent material, the stabilizer is a combination of nano carbon powder and resorcinol monobenzoate, the mass ratio of the stabilizer to the resorcinol monobenzoate is 1: 2, and the up-conversion luminescent material is Yb-doped3+、Er3+NaF of2The nanoparticles of (1).
The preparation method comprises the following steps:
step a, mixing the polyvinyl alcohol and water in parts by weight according to a mass ratio of 4.3: 1, stirring for 7min to be uniform under the ultrasonic condition and the temperature of 68 ℃ to obtain a polyvinyl alcohol solution;
b, adding the ethylene-ethyl acrylate copolymer, the alpha crystal form nucleated sorbitol and the quartz glass into a high-speed rotating mixer, mixing for 1.3 hours at the temperature of 135 ℃ and the rotating speed of 1800r/min, adding the polyvinyl alcohol solution, and continuously mixing for 0.5 hour to obtain a mixture;
c, dividing the mixture obtained in the step b into A, B, C groups, respectively adding the mixture into No. 1, No. 2 and No. 3 hoppers of an extruder at the temperature of 165 ℃, adding the stabilizer and the up-conversion luminescent material in parts by weight into the No. 2 hopper, rotating an extruder screw at the rotating speed of 250r/min, respectively fusing, passing through a shunt channel, and simultaneously extruding at 165 ℃ through a 2800mm automatic flat-mouth die head;
and d, after extrusion, cooling to 17 ℃ through a casting cooling system, carrying out corona treatment, and cutting edges and rolling to obtain the rapidly-degraded antibacterial plastic film.
In the above operation, the interlayer ratio of the upper and lower surface layers and the intermediate layer of the rapidly degradable antibacterial plastic film is 1: 2: 2; a 30-mesh screen is attached to the opening of the sub-runner; the corona treatment conditions were 17kW for electrode power and 5.0kW for driving motor power.
Example 4
The raw materials for preparing the upper surface layer and the lower surface layer of the rapidly degradable antibacterial plastic film comprise, by weight, 4800g of ethylene-ethyl acrylate copolymer, 3500g of polyvinyl alcohol, 350g of quartz glass and 1400g of α crystal form nucleated sorbitol, the raw materials for preparing the intermediate layer of the rapidly degradable antibacterial plastic film comprise, by weight, 4800g of ethylene-ethyl acrylate copolymer, 3500g of polyvinyl alcohol, 350g of quartz glass, 1400g of α crystal form nucleated sorbitol, 140g of stabilizer and 180g of up-conversion luminescent material, the stabilizer is a combination of nano carbon powder and resorcinol monobenzoate, the mass ratio is 1: 1, and the up-conversion luminescent material is Yb-doped mono (resorcinol) benzoate3+、Tm3+NaYF of4The nanoparticles of (1).
The preparation method comprises the following steps:
step a, mixing the polyvinyl alcohol and water in parts by weight according to a mass ratio of 5: 1, stirring for 8min to be uniform under the ultrasonic condition and the temperature of 72 ℃ to obtain a polyvinyl alcohol solution;
b, adding the ethylene-ethyl acrylate copolymer, the alpha crystal form nucleated sorbitol and the quartz glass into a high-speed rotating mixer, mixing for 1.6 hours at the temperature of 142 ℃ and the rotating speed of 1600r/min, then adding the polyvinyl alcohol solution, and continuously mixing for 0.5 hour to obtain a mixture;
c, dividing the mixture obtained in the step b into A, B, C three groups, respectively adding the mixture into No. 1, No. 2 and No. 3 hoppers of an extruder at the temperature of 180 ℃, adding the stabilizer and the up-conversion luminescent material in parts by weight into the No. 2 hopper, rotating an extruder screw at the rotating speed of 260r/min, respectively fusing, passing through a shunt channel, and simultaneously extruding at 172 ℃ through a 2800mm automatic flat-opening die head;
and d, after extrusion, cooling to 18 ℃ through a casting cooling system, carrying out corona treatment, and cutting edges and rolling to obtain the rapidly-degradable antibacterial plastic film.
In the above operation, the interlayer ratio of the upper and lower surface layers and the intermediate layer of the rapidly degradable antibacterial plastic film is 1: 2: 2; a 40-mesh screen is attached to the opening of the sub-runner; the corona treatment conditions were that the electrode power was 18kW and the driving motor power was 5.5 kW.
Example 5
The raw materials for preparing the upper surface layer and the lower surface layer of the rapidly degradable antibacterial plastic film comprise 4500g of ethylene-ethyl acrylate copolymer, 3200g of polyvinyl alcohol, 300g of quartz glass and 1200g of α crystal form nucleated sorbitol in parts by weight, the raw materials for preparing the intermediate layer of the rapidly degradable antibacterial plastic film comprise 4500g of ethylene-ethyl acrylate copolymer, 3200g of polyvinyl alcohol, 300g of quartz glass, 1200g of α crystal form nucleated sorbitol, 1.3 parts of stabilizer and 150g of up-conversion luminescent material in parts by weight, the stabilizer is a combination of nano carbon powder and resorcinol monobenzoate, the mass ratio is 1: 2, and the up-conversion luminescent material is Yb-doped3+、Tm3+Y of (A) is2O3、NaF2The nanoparticles of (1).
The preparation method comprises the following steps:
step a, mixing the polyvinyl alcohol and water in parts by weight according to a mass ratio of 4: 1, stirring for 8min to be uniform under the ultrasonic condition and at the temperature of 70 ℃ to obtain a polyvinyl alcohol solution;
b, adding the ethylene-ethyl acrylate copolymer, the alpha crystal form nucleated sorbitol and the quartz glass into a high-speed rotating mixer, mixing for 2 hours at the temperature of 140 ℃ and the rotating speed of 1500r/min, then adding the polyvinyl alcohol solution, and continuously mixing for 0.5 hour to obtain a mixture;
c, dividing the mixture obtained in the step b into A, B, C groups, respectively adding the mixture into No. 1, No. 2 and No. 3 hoppers of an extruder at the temperature of 165 ℃, adding the stabilizer and the up-conversion luminescent material in parts by weight into the No. 2 hopper, rotating screws of the extruder at the rotating speed of 300r/min, respectively fusing, passing through a shunt channel, and simultaneously extruding at 165 ℃ through a 2800mm automatic flat-mouth die head;
and d, after extrusion, cooling to 20 ℃ through a casting cooling system, carrying out corona treatment, and cutting edges and rolling to obtain the rapidly-degradable antibacterial plastic film.
In the above operation, the interlayer ratio of the upper and lower surface layers and the intermediate layer of the rapidly degradable antibacterial plastic film is 1: 2: 2; a 30-mesh screen is attached to the opening of the sub-runner; the corona treatment conditions were that the electrode power was 18kW and the driving motor power was 5.0 kW.
To further illustrate the technological advancement of the present invention, experiments are now taken to further illustrate it.
Experimental example 1
Experimental materials: a commercially available plastic film, and a rapidly degradable antibacterial plastic film produced according to examples 1 to 5 of the present invention.
The test method comprises the following steps: the properties of the materials were compared under the same conditions.
TABLE 1 comparison of the Properties of rapidly degradable antibacterial Plastic films
| Material | Antibacterial effect | Light transmittance | Stability of product quality |
| Commercially available plastic film | Poor effect | In general | Severe damage after 1 year |
| Example 1 Plastic filmFilm | Good effect | Good taste | Is not damaged after 1 year |
| Example 2 Plastic film | Good effect | Good taste | Is not damaged after 1 year |
| Example 3 Plastic film | Good effect | Good taste | Is not damaged after 1 year |
| Example 4 Plastic film | Good effect | Good taste | Is not damaged after 1 year |
| Example 5 Plastic film | Good effect | Good taste | Is not damaged after 1 year |
As can be seen from the above experimental examples, under the same conditions, the plastic films produced in the embodiments 1 to 5 of the present invention have good antibacterial property, light transmittance, and stable product quality.
Experimental example 2
And (4) comparing items: the degradation rates of commercially available plastic films and of the rapidly degradable, antimicrobial plastic films produced according to examples 1 to 5 of the present invention.
The test method comprises the following steps: the degradation rates of various plastic films were compared under the same conditions.
TABLE 2 comparison of the Properties of the rapidly degradable antibacterial Plastic films
| Material | 3 months degraded proportion |
| Commercially available plastic film | 60％ |
| Example 1 Plastic film | 80％ |
| Example 2 Plastic film | 88％ |
| Example 3 Plastic film | 86％ |
| Example 4 Plastic film | 90％ |
| Example 5 Plastic film | 82％ |
As can be seen from the experimental examples, the rapidly degradable antibacterial plastic film produced by the preparation method has the degradation rate of 80 percent in 3 months, and is more suitable for popularization and application.
The above description is only a preferred embodiment and an experimental example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The rapidly-degradable antibacterial plastic film is characterized by comprising an upper surface layer, a lower surface layer and a middle layer, wherein the raw materials for preparing the upper surface layer and the lower surface layer of the rapidly-degradable antibacterial plastic film comprise, by weight, 40-50 parts of ethylene-ethyl acrylate copolymer, 20-40 parts of polyvinyl alcohol, 2-4 parts of quartz glass and 10-15 parts of α crystal form nucleated sorbitol, the raw materials for preparing the middle layer of the rapidly-degradable antibacterial plastic film comprise, by weight, 40-50 parts of ethylene-ethyl acrylate copolymer, 20-40 parts of polyvinyl alcohol, 2-4 parts of quartz glass, 10-15 parts of α crystal form nucleated sorbitol, 1-1.5 parts of stabilizer and 1-2 parts of up-conversion luminescent material, the stabilizer is one or a combination of nano carbon powder and resorcinol monobenzoate, and the up-conversion luminescent material is Yb-doped3+/Er3+Or Yb3+/Tm3+The nanoparticles of (1); the nano particles are NaYF4、Y2O3And NaF2Any one or combination thereof.
2. The rapidly degradable antibacterial plastic film of claim 1, wherein the raw materials for preparing the upper and lower surface layers of the rapidly degradable antibacterial plastic film comprise, by weight: 45 parts of ethylene-ethyl acrylate copolymer, 32 parts of polyvinyl alcohol, 3 parts of quartz glass and 12 parts of alpha crystal form nucleated sorbitol; the raw materials for preparing the rapidly degradable antibacterial plastic film intermediate layer comprise the following components in parts by weight: 45 parts of ethylene-ethyl acrylate copolymer, 32 parts of polyvinyl alcohol, 3 parts of quartz glass, 12 parts of alpha crystal form nucleated sorbitol, 1.3 parts of stabilizer and 1.5 parts of up-conversion luminescent material.
3. The rapidly degradable antibacterial plastic film according to claim 1, wherein the molecular weight of the polyvinyl alcohol is 110000 to 130000.
4. The rapidly degradable antibacterial plastic film according to claim 1, wherein the particle size of the nano carbon powder is 20nm to 30 nm.
5. The rapidly degradable antibacterial plastic film according to claim 1, wherein the quartz glass is pulverized to 300-400 mesh.
6. A method for preparing a rapidly degradable antibacterial plastic film according to any one of claims 1 to 5, comprising the steps of:
step a, mixing the polyvinyl alcohol and water in parts by weight according to a mass ratio of 4-5: 1, uniformly stirring to obtain a polyvinyl alcohol solution;
b, adding the ethylene-ethyl acrylate copolymer, alpha crystal form nucleated sorbitol and quartz glass into a high-speed rotary mixer, mixing for 1-2 h at the temperature of 130-145 ℃ and the rotating speed of 1500-2000 r/min, adding the polyvinyl alcohol solution, and continuously mixing for 0.5h to obtain a mixture;
c, dividing the mixture obtained in the step b into A, B, C three groups, respectively adding the mixture into No. 1, No. 2 and No. 3 hoppers of an extruder at the temperature of 150-185 ℃, rotating screws of the extruder at the rotating speed of 200-300 r/min, respectively fusing, passing through a shunt channel, and simultaneously extruding at the temperature of 160-175 ℃ through a 2800mm automatic flat-mouth die head; the material hopper No. 2 is also added with the stabilizer and the up-conversion luminescent material in parts by weight;
and d, after extrusion, cooling to 15-20 ℃ through a casting cooling system, carrying out corona treatment, and cutting edges and rolling to obtain the rapidly-degradable antibacterial plastic film.
7. The preparation method according to claim 6, wherein in the step a, the stirring conditions are specifically: stirring for 5-10 min under the ultrasonic condition and at the temperature of 65-75 ℃.
8. The method according to claim 6, wherein in step c, a 30-40 mesh screen is attached to the sub-runners.
9. The preparation method according to claim 6, wherein in the step d, the corona treatment conditions comprise 16kW to 18kW of electrode power and 5.0kW to 5.5kW of driving motor power.
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| US20020182391A1 (en) * | 2001-04-04 | 2002-12-05 | Migliorini Robert A. | Multilayer matte films |
| CN1211305C (en) * | 2001-06-14 | 2005-07-20 | 湖南师范大学 | Agricultural double-energy light-converting glass and its making process and usage |
| FI117748B (en) * | 2001-10-15 | 2007-02-15 | Stora Enso Oyj | The lid of the package, the method of its manufacture and the sealed packaging |
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| US8236239B2 (en) * | 2007-11-16 | 2012-08-07 | Bernstein Eric F | Sterilizing compositions comprising phosphors for converting electromagnetic radiation to UVC radiation and methods for using the same |
| GB2543038B (en) * | 2015-10-01 | 2018-06-20 | Clifton Packaging Group Ltd | Antibacterial Packaging |
| CN105315695B (en) * | 2015-10-29 | 2017-08-18 | 严梅霞 | A kind of agricultural film and its manufacture method |
| CN108997634A (en) * | 2018-07-16 | 2018-12-14 | 天津市宝德包装有限公司 | A kind of preparation method of degradable antibiotic polyethylene film |
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