KR20240058359A - Photo-induced eco-friendly antimicrobial food package - Google Patents

Abstract

This application relates to an eco-friendly antibacterial food packaging composition that can be biodegraded by microorganisms and whose antibacterial effect can be continuously expressed by visible light. More specifically, the antibacterial function is expressed by active oxygen by light application, It is an eco-friendly antibacterial food that has a very high antibacterial effect against gram-negative and gram-positive bacteria as well as super bacteria, does not develop resistant bacteria, and reduces environmental pollution problems and carbon emissions by using biodegradable and bioharmless photosensitizers. It relates to a packaging composition.

Description

Eco-friendly antibacterial food packaging material {PHOTO-INDUCED ECO-FRIENDLY ANTIMICROBIAL FOOD PACKAGE}

This application relates to an eco-friendly antibacterial food packaging composition that can be biodegraded by microorganisms and whose antibacterial effect can be continuously expressed by visible light. More specifically, the antibacterial function is expressed by active oxygen by light application, It is an eco-friendly antibacterial food that has a very high antibacterial effect against gram-negative and gram-positive bacteria as well as super bacteria, does not develop resistant bacteria, and reduces environmental pollution problems and carbon emissions by using biodegradable and bioharmless photosensitizers. It relates to a packaging composition.

Packaging materials are intended to maintain the freshness of food (which may be labeled as “food”) such as meat, fish, vegetables, fruits, and processed foods for a certain period of time and to prevent contamination from various harmful external environments. When storing food, its freshness deteriorates over time, and food spoilage cannot be avoided due to the growth of mold and bacteria. In particular, due to the increase in single-person households and the development of eating out culture, the number of cases where food needs to be stored for a long period of time is increasing, and as a result, a large amount of food is rotting and being discarded.

Various methods for long-term preservation of food have been developed. The most common methods include freezing, drying, salting, and adding flavorings, but these methods have the disadvantage of changing the taste of food and requiring a lot of energy for preservation.

Therefore, research and development on antibacterial food packaging materials that maintain the freshness of food for a long period of time and prevent spoilage by bacteria and mold has been active, and antibacterial packaging materials for various products have been invented.

By adding minerals such as silver, copper, zinc, zeolite, or red clay powder to general polymers, or by adding powders impregnated with silver and copper ions into zeolite, polymer composite materials with antibacterial and oxygen penetration prevention functions are developed. For example, Republic of Korea Patent Publication No. 2002-0090657 discloses a method of adding metal powder to a high-temperature molten polymer to make a master chip and using it for injection molding. The second method is to develop antibacterial packaging materials using various types of organic preservatives and gas additives such as chlorine dioside, ethanol, sulfur dioxide, triclosan, and wasabi extract.

However, the conventional method of adding metal minerals to polymers has a complicated manufacturing process, which increases manufacturing costs and causes metal particles to agglomerate over time or due to processing problems, which reduces product quality uniformity and ensures repeatability of the process. There is a downside to not being able to do this. Meanwhile, packaging materials containing organic preservatives have poor high-temperature stability, so when processing films using polymers, the effectiveness of the organic preservatives is destroyed and the film manufacturing process is difficult. In addition, there is consumer resistance to chemical preservatives, and from the producer's perspective, there are problems that need to be solved, such as changes to the existing film manufacturing process due to the addition of antibacterial agents, uneven antibacterial effects due to dispersion problems of antibacterial agents, and increased manufacturing costs due to the granting of antibacterial properties. many.

In addition, traditional antibacterial packaging methods include heating/freezing/refrigeration and disinfectant treatment, and these technologies have limitations when applied to fresh food, such as deterioration in quality, deformation of the product, and problems with immediate consumption.

Recently used modified atmosphere packaging (MAP), ultraviolet sterilization (UV exposure), high pressure processing (HPP), pulsed electric field (PEF), and irradiation technology packaging, etc. However, this technology has the disadvantage of being difficult to apply in industrial settings due to the high initial investment cost for equipment introduction.

In addition, research has been reported on the development of functional packaging materials using porous ethylene adsorbents to directly remove ethylene gas from fruits, but these adsorbents do not maintain their adsorption capacity due to a decrease in activity due to external environmental requirements such as high temperature and high humidity. There are also disadvantages.

In addition, it has high antibacterial efficacy against various harmful microorganisms and mutant bacteria and does not deteriorate in quality. Considering that more than 38% of fresh fruits and vegetables are ready-to-eat products, the antibacterial effect is maintained not only during the processing process but also during delivery/eating to the end consumer. In addition, there is a need for the development of packaging materials that can reduce environmental pollution caused by products and overcome the difficulties of existing food packaging, such as deterioration of product quality due to disinfectants, requirements for a re-washing process, and product deformation due to packaging. .

According to an embodiment of the present application, a natural product-derived photosensitizer is supported on a biodegradable polymer to generate active oxygen through light induction and provide the functionality of effectively killing harmful microorganisms using the generated active oxygen, and the natural product By using derived photosensitizers and biodegradable polymers, we aim to provide eco-friendly antibacterial food packaging materials that can prevent environmental pollution by decomposing the photosensitizers and plastics introduced in nature after use as packaging materials.

One aspect of the present application relates to eco-friendly antibacterial food packaging materials.

In one example, the eco-friendly antibacterial food packaging material includes biodegradable polymers; And it may include a photosensitizer derived from natural products.

In one example, the eco-friendly antibacterial food packaging material may include a natural product-derived photosensitizer supported on a biodegradable polymer.

In one example, the oxygen permeability of the biodegradable polymer may be 500 to 3000 cc/m2day.

In one example, the biodegradable polymer includes polylactic acid (PLA), polyglycolid (PGA), thermoplastic starch (TPS), polyhydroxyalkanoate (PHA), hydrophobically associating polymer (AP), poly(butylene succinate) (PBS), and polyether polymer (PES). ), PBAT (polybutylene adipate terephthalate), PCL (polycaprolactone), Oxo Bio-PP (polypropylene), and Oxo Bio-PE (polyethylene).

In one example, the natural product-derived photosensitizer may be a photosensitizer that can generate light-induced active oxygen by light in the visible light region.

In one example, the natural product-derived photosensitizer may be a photosensitizer that is a natural product or edible pigment extracted from plants or strains.

In one example, the natural product-derived photosensitizer is selected from the group consisting of Curcumin, Pterin, Prietin, Aloemodin, Flavin, Riboflavin, Acriflavin, Hypericin, L. racemose, C. odorata, A. procera, and food coloring. It may include at least one selected.

In one example, the natural product-derived photosensitizer may be Monascus purpures.

In one example, Pterins may include isoxancopterin, leukopterin, xanthopterin, biopterin, and neopterin.

In one example, the food coloring includes at least one selected from the group consisting of Red No. 2, Red No. 3, Red No. 40, Red No. 102, Yellow No. 4, Yellow No. 5, Blue No. 1, Blue No. 2, and Blue No. 3. can do.

In one example, the biodegradable polymer and natural product-derived photosensitizer may be 60 to 99 parts by weight: 40 to 1 part by weight.

In one example, the biodegradable polymer may include PLA and Oxo Bio-PE.

In one example, the biodegradable polymer may include 50 to 80 parts by weight of PLA and Oxo Bio-PE: 50 to 20 parts by weight.

According to an embodiment of the present application, it can be provided as an eco-friendly antibacterial food packaging material.

According to an embodiment of the present application, an eco-friendly antibacterial food packaging material that maintains the function of the photosensitizer introduced into the polymer through SS encapsulation, surface modification, mixed polymerization method, etc. can be provided.

According to an embodiment of the present application, eco-friendly antibacterial food packaging material applied with optimized control technology for the production of active oxygen in photoreactive polymers can be provided.

According to an embodiment of the present application, it can be provided in an eco-friendly antibacterial food packaging material to which technology for inhibiting the growth of harmful microorganisms and optimizing killing efficacy has been applied.

According to an embodiment of the present application, by applying a photosensitizer derived from natural products, unlike conventional photosensitizers and photofunctional materials that lack environmental pollution problems or economic feasibility, it is environmentally friendly, has excellent economic efficiency, and provides a carbon reduction effect. can do.

According to an embodiment of the present application, the biological risk of new chemical compounds can be excluded from food colorings whose safety has been verified.

According to an embodiment of the present application, PLA and Oxo Bio-PE, as biodegradable polymers, can be combined to provide eco-friendly antibacterial food packaging materials with optimal antibacterial properties. In particular, PLA and Oxo Bio-PE can be used in a weight ratio of 60 When combining from 99 to 40 to 1, antibacterial properties can be greatly improved.

Figure 1 is a drawing explaining a method of manufacturing a biodegradable polymer through photocuring and an image of the produced biodegradable polymer.
Figure 2 is a graph showing the results of analysis by steady-state emission spectroscopy on a polymer by cross linking of tymine.
Figure 3 is a graph of results analyzed by Fourier transform infrared spectroscopy.
Figure 4 is a diagram for explaining Monascus purpures (red yeast extract).
Figure 5 is a time-resolved singlet oxygen phosphorescence spectra graph for red No. 3.
Figure 6 is a graph showing the results of measuring the amount of bacteria in Experimental Example 1.
Figure 7 is a graph showing the results of measuring the amount of bacteria in Experimental Example 2.
Figure 8 is a graph showing the results of measuring the amount of bacteria in Experimental Example 3.
Figure 9 is a graph showing the results of measuring the amount of bacteria in Experimental Example 4.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “include” or “have” are intended to designate the presence of features, components, etc. described in the specification, but one or more other features or components, etc. may not be present or may be added. That doesn't mean there isn't one.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, the eco-friendly antibacterial food packaging material of the present application will be described in detail with reference to the attached drawings. However, the attached drawings are illustrative, and the scope of the eco-friendly antibacterial food packaging material of the present application is not limited by the attached drawings.

One aspect of the present application relates to eco-friendly antibacterial food packaging materials.

In the case of conventional antibacterial packaging using light energy, food is sterilized through ultraviolet irradiation and then distributed, so ultraviolet sterilization equipment is required. Excessive irradiation of ultraviolet rays may deteriorate or deform the quality of food and cause photocorrosion of packaging containers. Additionally, due to one-time processing, it can easily become contaminated during the distribution process.

In addition, Tenkeeper products incorporating silver nanoparticles are representative antibacterial packaging materials using photocatalysts, but their application is limited to paper packaging materials, the production cost is high, and the toxicity of silver nanoparticles is still a problem that needs to be resolved.

The packaging material according to an embodiment of the present application exhibits antibacterial efficacy through active oxygen generated by visible light, and has high resistance against multi-drug resistance such as superbacteria as well as gram-negative/positive bacteria due to the high activation energy of active oxygen. Provides sterilization efficacy.

In addition, the packaging material according to an embodiment of the present application shows a sterilization efficacy of more than 99.99% and 99.9%, respectively, by the light source of the food packaging display stand and sunlight for the expression of antibacterial efficacy.

In addition, the packaging material according to an embodiment of the present application is an antibacterial packaging using a food preservative, and representative organic acids, salts, chelating agents, Imazalil anti-fungal agent, enzymes, bacteriocins, essential oils, chitin, chitosan, etc. are used. However, the antibacterial efficacy varies greatly depending on the target bacteria. For example, among organic acids, sorbic acid has no antibacterial effect against lactic acid bacteria and anaerobic bacteria. Antibacterial efficacy varies greatly depending on environmental conditions. For example, sodium benzonate is ineffective at high pH. Additionally, toxicity may occur due to modification of preservatives under certain environmental conditions.

In addition, in the case of antibacterial packaging materials containing lactic acid and citric acid, the antibacterial efficacy has been verified, but the effect is minimal or only shows antibacterial efficacy against specific bacteria.

The packaging material according to an embodiment of the present application expresses antibacterial efficacy through active oxygen generated by light application, thereby expressing antibacterial effect against various bacteria through non-selective reactivity of singlet oxygen among active oxygen. In addition, the antibacterial effect is maintained even during packaging, distribution, and eating of food due to the continuous production of active oxygen while light energy is irradiated.

In addition, there is no need for additional equipment, and safe antibacterial packaging materials can be provided. In particular, unlike existing vacuum or high-pressure packaging systems, there is no need for additional equipment, environmental safety is guaranteed based on biodegradable polymers, and a bio-harmless photosensitizer can be introduced through the introduced photoreactive mechanism.

In one example, the eco-friendly antibacterial food packaging material includes biodegradable polymers; And it may include a photosensitizer derived from natural products. In particular, eco-friendly antibacterial food packaging materials may include a natural product-derived photosensitizer supported on a biodegradable polymer.

Here, “support” includes physical fixation or chemical bonding of a natural product-derived photosensitizer within a polymer, and also includes cross linking.

Biodegradable polymers are a type of polymer that releases natural by-products such as carbon dioxide, nitrogen, water, biomass, and inorganic salts that can be chemically decomposed after use. These polymers are found naturally or made through synthetic processes, and are composed of ester, amide, and ether functional groups.

Figure 1 is a diagram illustrating a method of manufacturing a biodegradable polymer through photocuring and an image of the produced biodegradable polymer.

Figure 2 is a graph showing the results analyzed by steady-state emission spectroscopy for a polymer by cross linking of tymine, and Figure 3 is a graph showing the results analyzed by Fourier transform infrared spectroscopy. Specifically, as an analysis result of a sample in which a polymer film was manufactured by UV irradiation of deoxyribonucleic acid (DNA) extracted from salmon sperm. In particular, polymers are formed through the crosslinking reaction of thymine in DNA. It can be confirmed that it has been polymerized through IR.

As can be seen in the emission spectrum, as the UV irradiation time increases, the peak in the 400nm region increases, and the peak in the 1086 and 962 regions seen in the FT-IR septrum decreases, indicating an increase in crosslinking by thymine. , it can be confirmed that it has been polymerized.

According to one aspect of the present application, the oxygen permeability of the biodegradable polymer may be 500 to 3000 cc/m2day. If the oxygen permeability is less than 500, the oxygen permeability is too low and the amount of active oxygen generated by light irradiation is very small and cannot provide the desired effect. On the other hand, if the oxygen permeability exceeds 3000 cc/㎡day, the oxygen permeability is too high and the amount of oxygen permeable is too high. There is a problem that quenching phenomenon occurs due to collision between active oxygens. However, the lower limit may be 500, 600, 700, 800, 900, or 1000. On the other hand, the upper limit could be 3000, 2900, 2800, 2700, 2600, 2500, 2400, 2300, 2200, 2100 or 2000.

Oxygen permeability represents the amount of oxygen penetrating the specimen per unit time and unit area under certain temperature, humidity, and oxygen concentration conditions. In general, if the oxygen permeation amount exceeds a certain level, the amount of active oxygen generated may actually decrease. Additionally, the optimal conditions may vary depending on the type of polymer.

In particular, when light in the visible light range is irradiated on such a polymer film or polymer molded product, reactive oxygen species or free radicals are generated from the photosensitizer contained in the polymer film or polymer molded product. As described above, the polymer film or polymer molded product generates active oxygen species or free radicals. As the molded article has an oxygen permeability in the above-mentioned range, active oxygen can be generated more efficiently and the remaining time of active oxygen can be greatly increased.

Biodegradable polymers include PLA (polylactic acid), PGA (polyglycolid), TPS (thermoplastic starch), PHA (polyhydroxyalkanoate), AP (hydrophobically associating polymer), PBS (poly(Butylene succinate)), PES (polyether polymer), and PBAT ( It may include, but is not limited to, at least one selected from the group consisting of polybutylene adipate terephthalate (PCL), polycaprolactone (PCL), Oxo Bio-PP (polypropylene), and Oxo Bio-PE (polyethylene).

However, the biodegradable polymer preferably includes PLA and Oxo Bio-PE, and the content is more preferably 50 to 80 parts by weight: 50 to 20 parts by weight.

In this application, the optimal ratio of the two compounds was found and the range in which active oxygen could be maximized to maximize the antibacterial effect was confirmed. The oxygen permeability of PLA is about 120, and that of Oxo Bio-PE is about 3000. It is predicted that the oxygen permeability will increase as the content of Oxo Bio-PE increases. However, when the content of Oxo Bio-PE is relatively high, oxygen permeability is reduced by collisions between active oxygens within the pores of the biopolymer and oxygen is formed again. Since the rise stops, the optimal antibacterial effect is achieved at the ratio of 50 to 80 parts by weight: 50 to 20 parts by weight.

Additionally, the packaging material according to one aspect of the present application may include a photosensitizer derived from natural products.

A photosensitizer absorbs light to generate reactive oxygen species (ROS), and reactive oxygen species or free radicals can be generated from the photosensitizer by irradiating light of a specific wavelength from the outside. The natural product-derived photosensitizer of the present application may be a natural product or food coloring extracted from plants or strains.

In particular, the photosensitizer of the present application can generate light-induced active oxygen by light in the visible light region.

Examples of such natural product-derived photosensitizers include at least one selected from the group consisting of Curcumin, Pterin, Prietin, Aloemodin, Flavin, Riboflavin, Acriflavin, Hypericin, L. 　racemose, C. 　odorata, A. 　procera, and food coloring. It can contain one.

Additionally, the natural product-derived photosensitizer may be Monascus purpures.

Figure 4 is a diagram for explaining Monascus purpures (red yeast extract).

The compound can be obtained by grinding red rice, dispersing it in a solvent, and performing distillation extraction while raising the temperature. The remaining material can be dissolved in a solvent again and then compound 2 can be obtained through recrystallization. Orange, yellow, red, etc. can be obtained from the obtained compound 2 through amination reaction and reduction reaction. Among these, the absorption wavelength area and emission wavelength area can be confirmed by measuring the orange and red emission and excitation sepctrum. In addition, it can be confirmed that singlet oxygen is generated in the two samples through a time-resolved singlet oxygen phosphorescence measurement experiment.

Additionally, Pterins may include isoxancopterin, leukopterin, xanthopterin, biopterin, and neopterin.

In addition, the food coloring may include at least one selected from the group consisting of Red No. 2, Red No. 3, Red No. 40, Red No. 102, Yellow No. 4, Yellow No. 5, Blue No. 1, Blue No. 2, and Blue No. 3. there is.

Figure 5 is a time-resolved singlet oxygen phosphorescence spectra graph for red No. 3. It is about an experiment to check whether and how much singlet oxygen, a type of active oxygen, is produced. Nanosecond pulse laser light (wavelength corresponding to the absorption spectrum of the sample) was irradiated to the sample, and the phosphorescence of singlet oxygen generated in the sample (1270 nm wavelength range) was measured. As shown in Figure 5, the lifetime of the produced singlet oxygen is about 62 microseconds in the D2O solvent. Through this, the diffusion distance of the generated singlet oxygen is calculated. However, considering that the packaging material is used in the atmosphere rather than D2O, the life time and diffusion distance of singlet oxygen in the atmosphere can be improved.

In one example, the biodegradable polymer and the natural product-derived photosensitizer may be 60 to 99 parts by weight: 40 to 1 part by weight.

Hereinafter, the present application will be described in more detail through experimental examples.

[Experimental Example 1]

The following experiment was performed to confirm the growth inhibitory effect of the packaging material of the present application (see Figure 1) on tomato bacteria.

Tomatoes were inoculated with Escherichia coli and Staphylococcus carotovora, placed in packaging materials and general packaging materials manufactured using salmon sperm-derived polymer (2021APP-R3PA-1), which is an example of this application, and irradiated with light for 3 days. As a control, tomatoes inoculated with bacteria were placed in the packaging material of the present application and stored in a dark room for 3 days. Samples were collected at intervals of 4, 12, 24 hours, 2 days, and 3 days to measure the amount of bacteria. The results are shown in Figure 6.

As shown in Figure 6, in the case of tomatoes in the packaging material of the present application, the number of bacteria is reduced or maintained, whereas when light is irradiated to the remaining general packaging material, the amount of bacteria increases when light is not irradiated to the packaging material of the present application. I was able to confirm.

[Experimental Example 2]

Additionally, the following experiment was performed to confirm the growth inhibition effect of the packaging material manufactured using the salmon sperm of the present application against bacteria.

Using salmon sperm-derived polymers (2021APP-R3PA-1, 2021APP-R3PA-2, 2021APP-R3PA-8, where the last numbers 1, 2, and 8 indicate the content of the photosensitizer), which is an example of the present application The results of measuring the amount of bacteria after inoculating three types of bacteria into three types of packaging materials manufactured and irradiating light for 30 minutes (15 mw) are shown in Figure 7.

As shown in Figure 7, it was confirmed that the amount of bacteria was greatly reduced in the packaging material according to the present application.

[Experimental Example 3]

Additionally, experiments were conducted to derive the optimal content of PLA and OXO bio-PE. Figure 8 shows the results of measuring the amount of bacteria.

C means comparative example, and S means example. Antibacterial refers to a sample containing biodegradable polymer and a photosensitizer (food coloring red No. 3), and general refers to a sample containing only biodegradable polymer. Additionally, dark refers to dark conditions, and light refers to light conditions. In S2 to S10, the content of OXO bio-PE is expressed in weight%. For example, S2 means 99% PLA and 1% OXO bio-PE.

In addition, the target bacteria was E. coli, the light source was a white LED (2.5 mW/cm2), the light irradiation was 1 hour, and the incubation time was 24 hours.

Referring to Figure 8, the reason that the amount of bacteria in C2 and C4 is greater than that of C1 is that the bacteria proliferated due to the thermal effect caused by light irradiation. In the case of C3, it is believed that the amount of bacteria increased compared to C1 because the oxygen permeability was high and bacterial proliferation occurred smoothly.

As shown in Figure 8, in the case of S5, S6, S7 and S8, the amount of bacteria was significantly reduced, and in particular in the case of S7, it was confirmed that the amount of bacteria was the lowest in the sample containing 40% OXO bio-PE. It is believed that the amount of bacteria in S9 and S10 is relatively increased compared to S7 because the generated active oxygen collides within the pores of the polymer and returns to normal oxygen.

[Experimental Example 4]

Additionally, an experiment was performed to derive the optimal content of the photosensitizer. Figure 9 shows the results of measuring the amount of bacteria.

C means comparative example, and S means example. Antibacterial refers to a sample containing biodegradable polymer (60 parts by weight of PLA and 40 parts by weight of OXO bio-PE) and a photosensitizer (food coloring red No. 3), and general refers to a sample containing only biodegradable polymer. . Additionally, dark refers to dark conditions, and light refers to light conditions. C1 is a sample containing 50% by weight of a polymer including 60 parts by weight of PLA and 40 parts by weight of OXO bio-PE and 50% by weight of a photosensitizer. Each of S1 to S12 contains 0.05% to 70% by weight of a photosensitizer. For example, in the case of S7, it means 80% by weight of polymer including 60 parts by weight of PLA and 40 parts by weight of OXO bio-PE and 20% by weight of photosensitizer.

In addition, the target bacteria was E. coli, the light source was a white LED (2.5 mW/cm2), the light irradiation was 1 hour, and the incubation time was 24 hours.

As shown in Figure 9, in the case of S4, S5, S6, S7, S8 and S9 (1 to 40% by weight of photosensitizer), the amount of bacteria was significantly reduced, especially in the case of S7, the amount of bacteria in the sample containing 20% of photosensitizer was reduced. In this case, it was confirmed that the amount of bacteria was the lowest. In S10 to S12, the generated active oxygen is eliminated by the photosensitizer, and the antibacterial effect is reduced.

The above-described packaging materials can be applied to the fields of uncooked ready-to-eat foods or fresh fruits and vegetables, livestock products, and marine products. The product developed through this application uses light, that is, by continuously generating active oxygen through irradiation of visible light, it can continuously induce the inhibition of bacterial growth even during shelf storage and eating of uncooked ready-to-eat food. In addition, in relation to the field of fresh fruits and vegetables, livestock products, and marine products, active oxygen is expressed through light application, and the generated active oxygen diffuses effectively in the air and water, thereby suppressing bacterial growth in fresh fruits and vegetables and livestock products as well as fish and shellfish such as oysters. Effective. In particular, active oxygen in the form of gas can show effective antibacterial effect even on vegetables with fine pores such as baby broccoli and radish sprouts. In addition, it can be applied to various food groups (tofu, salad, etc.) that are difficult to heat/freeze or vacuum pack, and to the packaging of semi-cooked products such as skewers. In addition, light-applied eco-friendly antibacterial packaging materials can be applied to antibacterial films (kiosks, elevators, face shields, etc.) through their non-specific antibacterial properties (no resistance to bacteria) against various bacteria through active oxygen.

Although the present application has been described above with reference to preferred embodiments, those skilled in the art may modify and change the present application in various ways without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it is possible.

Claims (13)

biodegradable polymer; and
Eco-friendly antibacterial food packaging material containing photosensitizer derived from natural products.
According to claim 1,
An eco-friendly antibacterial food packaging material containing a natural product-derived photosensitizer supported on a biodegradable polymer.
According to claim 1,
An eco-friendly antibacterial food packaging material whose biodegradable polymer has an oxygen permeability of 500 to 3000 cc/㎡day.
According to claim 1,
Biodegradable polymers include PLA (polylactic acid), PGA (polyglycolid), TPS (thermoplastic starch), PHA (polyhydroxyalkanoate), AP (hydrophobically associating polymer), PBS (poly(Butylene succinate)), PES (polyether polymer), and PBAT ( An eco-friendly antibacterial food packaging material comprising at least one selected from the group consisting of polybutylene adipate terephthalate (PCL), polycaprolactone (PCL), Oxo Bio-PP (polypropylene), and Oxo Bio-PE (polyethylene).
According to claim 1,
Natural product-derived photosensitizer is an eco-friendly antibacterial food packaging material that is a photosensitizer that can generate light-induced oxygen radicals by light in the visible light range.
According to claim 5,
Natural product-derived photosensitizer is an eco-friendly antibacterial food packaging material that is a photosensitizer that is a natural product or food coloring extracted from plants or strains.
According to claim 5,
The natural product-derived photosensitizer includes at least one selected from the group consisting of Curcumin, Pterin, Prietin, Aloemodin, Flavin, Riboflavin, Acriflavin, Hypericin, L. racemose, C. odorata, A. procera, and food coloring. Containing eco-friendly antibacterial food packaging materials.
According to claim 5,
An eco-friendly, antibacterial food packaging material whose natural product-derived photosensitizer is Monascus purpures.
According to claim 7,
Pterin is an eco-friendly antibacterial food packaging material containing isoxancopterin, leukopterin, xanthopterin, biopterin and neopterin.
According to claim 7,
The food coloring is an eco-friendly antibacterial food containing at least one selected from the group consisting of Red No. 2, Red No. 3, Red No. 40, Red No. 102, Yellow No. 4, Yellow No. 5, Blue No. 1, Blue No. 2, and Blue No. 3. Packaging material.
According to claim 1,
An eco-friendly antibacterial food packaging material containing 60 to 99 parts by weight: 40 to 1 part by weight of biodegradable polymer and natural product-derived photosensitizer.
According to claim 1,
Biodegradable polymers are eco-friendly antibacterial food packaging materials including PLA and Oxo Bio-PE.
According to claim 1,
Biodegradable polymer is an eco-friendly antibacterial food packaging material containing 50 to 80 parts by weight of PLA and Oxo Bio-PE: 50 to 20 parts by weight.