728 results about "Oxygen barrier" patented technology

The invention relates to the technical field of data processing, and discloses an anti-oxidation barrier layer performance degradation prediction method and system based on multi-source data. The method comprises the following steps: collecting and preprocessing multivariate data of a barrier layer environment, and constructing three-dimensional tensor data; indexes such as oxygen blocking efficiency and anti-permeability performance are calculated, and performance time sequence data are obtained; extracting multi-dimensional features and fusing the multi-dimensional features through an automatic encoder; applying a hybrid deep learning model to predict performance degradation; analyzing degradation curve characteristics, and executing mode clustering to obtain a risk matrix; and optimizing a maintenance decision scheme based on risk assessment. According to the invention, the hybrid deep learning model is utilized to capture the dependency relationship of time and space dimensions at the same time, and the prediction precision is significantly improved; based on degradation mode identification and risk level evaluation, accurate multi-scene maintenance decision is realized, environmental risk is reduced, and maintenance cost is optimized.

The invention discloses a preparation method of a POK and EVOH blending modified high-barrier material, which comprises the following steps: pre-drying, uniformly mixing, cooling and curing, air injection for water removal, pelletizing, secondary drying and the like to obtain the POK and EVOH modified high-barrier material, compounding the POK, EVOH and EAA according to a certain proportion to form a three-phase mixed system, and playing a synergistic effect to obtain the POK and EVOH blending modified high-barrier material. The oxygen barrier effect is improved; through the special compatilizer for POK, the compatibility of POK and the EVOH material is improved, and the mechanical property of the material is improved; the oxygen barrier effect of POK at high temperature and high humidity is basically not reduced, and the oxygen barrier effect of the whole system at high temperature and high humidity is improved; the antioxidant system improves the thermal stability of the EVOH material and the POK material during processing, and solves the problems that the materials are easy to decompose during processing and easy to yellow after being used for a long time.

The invention relates to a high-barrier antibacterial polylactic acid packaging material and a preparation method thereof, and belongs to the technical field of biodegradable packaging materials. The technical problems that a traditional polylactic acid material is insufficient in barrier property, poor in antibacterial performance and difficult to meet the packaging requirements of livestock and poultry meat, food and medicine are solved. A graphene oxide lamellar material is subjected to copper ion functionalization treatment and is bridged with tannic acid molecules through copper ions to form a nano filler, and then the filler is blended with a plasticized polylactic acid solution to prepare the membrane. The preparation method comprises the following steps: preparing a copper ion functionalized dispersion liquid from graphene oxide and copper nitrate, self-assembling the copper ion functionalized dispersion liquid and tannic acid under the condition that the pH is 8-10 to generate a nanofiller, uniformly dispersing the nanofiller, mixing the nanofiller with polylactic acid, polyethylene glycol and glycerol according to a specific mass ratio, coating to form a film, and controlling solvent volatilization conditions to obtain the high-performance packaging material. According to the method, the oxygen barrier property and the antibacterial activity of the material are remarkably improved through uniform dispersion of the nanofiller and reinforcement of a coordination network. The obtained material is suitable for packaging foods such as livestock and poultry meat.

The invention relates to the technical field of food packaging materials, in particular to a cerium dioxide nano-enzyme modified antibacterial coating and application of the cerium dioxide nano-enzyme modified antibacterial coating in food packaging. The biomimetic mineralization layer comprises the following components in percentage by weight: 35-45% of a green base material, 8-12% of dopamine modified yttrium-doped cerium dioxide nano-enzyme, 4-6% of a composite antibacterial agent, 3-4% of a natural cross-linking agent, 2-3% of a degradable plasticizer, 1-2% of a biomimetic mineralization layer precursor and the balance of deionized water, the green base material is a blend of a chitosan-polyethylene glycol graft and polylactic acid; the doping amount of Y3 in the nano enzyme is 3-4at%. The antibacterial agent is excellent and lasting in antibacterial effect, has no migration risk of the antibacterial agent, and can guarantee food safety; a green base material and a degradable plasticizer are adopted, so that natural degradation is realized, and environmental pollution is avoided; the mechanical property is good, the aging resistance is realized, and the oxygen barrier property is strong; the food packaging box is suitable for various foods, effectively prolongs the shelf life, and meets the requirement of green packaging.

The invention discloses a compostable and reslurrable mineral-based dual-scale barrier coating as well as preparation and application thereof, and belongs to the technical field of water-based and reslurrable barrier materials. In order to overcome the defects of high coating weight, large color difference or difficulty in recovery in the prior art, a compact barrier is constructed through double-scale collaborative design of interlayer intercalation of layered double hydroxides and interparticle metal micro-networks. The method has the prominent advantage that high-efficiency water-oxygen barrier better than that of a conventional scheme can be realized only by using an extremely low coating amount. Meanwhile, the coating strictly controls color difference to maintain high whiteness of the paper, has pH responsiveness, can be quickly unlapped and dispersed under an acidic condition, and is easy to re-pulp. The coating does not contain PFAS and PVDC, and unification of high barrier, high whiteness and recoverability is achieved.

The present invention discloses a method for preparing a modified PHA composite material using a twin-screw extruder and its application. The method is carried out by in-situ melt blending of polyhydroxyalkanoate PHA, polybutylene terephthalate-adipate PBAT, polyvinyl alcohol PVOH and a chain extender in a twin-screw extruder, so that a multifunctional epoxy or isocyanate chain extender reacts with the terminal groups of PHA, PBAT and PVOH molecules to form a partially cross-linked or grafted structure, thereby achieving enhanced compatibility, improved thermal stability and significant improvement in barrier properties. Experiments have shown that the modified PHA composite material obtained by the present invention has high strength, high elongation, excellent water and oxygen barrier properties and biodegradable properties, and meets the stringent requirements for mechanical properties and barrier properties in multiple fields such as food packaging, agricultural mulch and medical consumables. The preparation method of the present invention is simple and efficient, and can be used for large-scale continuous production on existing twin-screw extrusion equipment.

The invention discloses a high-barrier material based on a PET aminolysis monomer and a preparation method of the high-barrier material, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: carrying out aminolysis reaction on polyethylene glycol terephthalate (PET) to prepare a dihydric alcohol monomer containing an amido bond, and carrying out polymerization reaction on the dihydric alcohol monomer and aliphatic dibasic acid to prepare a polyesteramide (PEA) material. The prepared PEA material has excellent oxygen barrier property and toughness, the oxygen barrier property of the PEA material is obviously superior to that of a PET material, and the barrier property and mechanical property of the PEA material can be regulated and controlled by changing the length of a methylene chain segment of the aliphatic dibasic acid monomer. The aliphatic dibasic acid monomer can be derived from biomass resources, the reaction condition is mild, the process is simple, and the method is suitable for industrial large-scale production.

The invention discloses a mineral-based easily-recyclable compostable water-based barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating takes water as a carrier, and is composed of a biodegradable film forming system and a designed graded lamellar mineral system composed of three minerals with different sizes and morphologies. The mineral system comprises flaky kaolin with specific morphology and size, non-asbestos grade flaky talc and fully stripped sodium montmorillonite. A mineral sheet layer forms a compact parallel spreading barrier path in a coating through a specific coating and drying curing process, and excellent water vapor and oxygen barrier, water resistance and oil resistance are realized under the low dry weight of 8-15g / m by combining with a pH value response type reversible cross-linking system. The coating system does not contain polyvinylidene chloride and perfluoroalkyl and polyfluoroalkyl substances. The paper-based material coated with the coating is easy to defibrillate and recover under the standard alkaline warm water condition, the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirement.

The invention belongs to the technical field of biodegradable materials, and relates to a PBAT / bamboo powder biodegradable composite master batch and a preparation method thereof, and a composite film, the composite master batch comprises the following raw materials by mass: 100 parts of PBAT, 10-30 parts of modified bamboo powder, 5-10 parts of a compatibilization grafting agent, 0.5-1 part of a retardant, 20-30 parts of a blocking agent, and 0.2-0.4 part of a chain extender; the modified bamboo powder is obtained by impregnating bamboo powder with inorganic alkali liquor and modifying with an acyl halide reagent; the compatibilization grafting agent is obtained by grafting and modifying PBAT (poly (butylene adipate-co-terephthalate)) through ultraviolet light of a grafting agent, and the grafting agent is compounded by carboxyl-containing acrylate and unsaturated fatty acid glycidyl ester according to the mass ratio of 1: (1-2). According to the invention, the bamboo powder is modified and a novel compatibilization grafting agent is introduced, so that the hydrophobicity, dispersity and compatibility with PBAT of the bamboo powder are improved, and the prepared composite film has good appearance, high water and oxygen barrier property and better mechanical properties.

Methods and apparatus for vacuum forming and subsequently applying topical coatings fiber-based food containers. The slurry includes one or more of an embedded moisture barrier, vapor barrier, and oil barrier, and the topical coating comprises one or more of a vapor barrier, a moisture barrier, an oil barrier, and an oxygen barrier. For food containers having deep sidewalls, a spray coating system includes a first nozzle for applying a full cone spray pattern to the bottom surface of the container, and a second nozzle for applying a hollow cone spray pattern to the inside surfaces of the side walls.

The invention discloses a method for improving the stability of a quantum dot optical film, which comprises the following steps of: adding scattering particles and a water repellent agent into acrylic resin to form a mixed solution, stirring, fully stirring, adding a quantum dot solution, continuously fully stirring to form quantum dot glue, and finally coating the quantum dot glue between an upper barrier film and a lower barrier film to form the quantum dot optical film. And performing UV curing to obtain the quantum dot optical film. According to the method, the water repellent agent is added in the process of mixing the quantum dots and the acrylic resin into the quantum dot glue to reduce the influence of water and oxygen on the quantum dots, and the stability of the quantum dot optical film under the high-temperature and high-humidity conditions of 85 DEG C and 85% RH can be improved; compared with a method for modifying a quantum dot material or using a barrier film with a high water and oxygen barrier rate, the method disclosed by the invention is simple and convenient to operate, low in cost and suitable for mass production of the quantum dot optical film on a large scale.

The invention relates to the technical field of food packaging, and discloses an antibacterial food packaging film which is characterized by comprising a basic packaging material, an antibacterial agent, other additives, solid moisture absorption particles and a casting polypropylene film. The basic packaging material comprises polypropylene and polyethylene. The antibacterial agent is an anionic antibacterial agent. Anhydrous calcium chloride is adopted as the solid moisture absorption particles. The other additives comprise a plasticizer and a solubilizer. The preparation method has the advantages that the preparation process flow is simple, materials and equipment used in processing are daily visible and are easy to obtain, and the cost is low; the antibacterial food packaging film prepared by the invention has good antibacterial performance and also has relatively good waterproofness and air tightness, the waterproofness and oxygen barrier property of the packaging film can be improved, and the safety performance of food is improved; the antibacterial food packaging film prepared by the invention is good in drying performance, capable of avoiding reproduction of bacteria and capable of protecting food.

The invention relates to a method for producing an oxygen barrier material, comprising: providing a support layer comprising paper and a first coating, applying a second coating on the support layer by extrusion technique, thereby forming a second coating on the support layer, the second coating having a gram weight of between 5 and 50 g / m2, where the second coating is compostable and / or biodegradable in industrial compost, the first coating is made to be at least 90% biodegradable within 6 months, the polymeric material in the first coating is biodegradable, the oxygen barrier material is compostable, and the oxygen barrier material has an oxygen barrier value of less than 70 cc / m2 * day. The invention also relates to an oxygen barrier material.

A multilayer packaging material includes a substrate formed of a cellulosic fiber-based material. The substrate has a first major surface and a second major surface opposite the first major surface. An oxygen barrier layer is formed of a PVOH material attached to the substrate, wherein the oxygen barrier layer is an innermost layer of the multilayer packaging material and further wherein the oxygen barrier layer is heat sealable. At least one moisture barrier layer is attached to the substrate, the moisture barrier layer selected from an inner moisture barrier layer disposed intermediate the substrate and the oxygen barrier layer and an outer moisture barrier layer disposed on the second major surface of the substrate. In further aspects, a packaging article, a method for making a multilayer packaging material, and a method for packaging a product are provided.

To provide a gas barrier laminate having a gas barrier coating film excellent in oxygen barrier properties and transparency and having steam barrier properties more excellent than those of a conventional gas barrier coating film, and to provide a coating composition capable of efficiently forming the gas barrier coating film.SOLUTION: The gas barrier laminate has a gas barrier coating film on a substrate, and is characterized in that it is free from coloration derived from organic compounds such as amine compounds and carboxylic acid compounds, the content ratio (P / Zr) of Zr (Zr-kα) and P (P-kα) in fluorescent X-ray measurement of the coating film is in the range of 1.39 to 2.59, and the ratio (P2 / P1) of the peak area (P2) at 2600 to 3700 cm-1 to the peak area (P1) at 850 to 1350 cm-1 in the infrared absorption spectrum of the coating film is less than 0.772.SELECTED DRAWING: None

A resin composition containing a hydrophilic resin and a metal compound, and satisfies the following expression (1) when being formed into a film:α1−β1≥1  (1)wherein α1 is an average metal atom concentration (%) in a portion of the film in a depth range of 0 to 9 nm from a film surface, and β1 is an average metal atom concentration (%) in a portion of the film in a depth range of 12 to 21 nm from the film surface. The resin composition is excellent in gas barrier property, particularly in oxygen barrier property, in a high humidity environment.

The application discloses a mineral-based easily-recyclable compostable water-barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating is formed by a biodegradable film-forming system and a hierarchical lamellar mineral system containing three different scales and morphologies. The mineral system contains specific morphology and size of lamellar kaolin, non-asbestos grade lamellar talc and fully exfoliated sodium montmorillonite. The mineral lamella forms a dense parallel spread barrier path in the coating through a specific coating and drying solidification process, and combines a pH value responsive reversible cross-linking system to achieve excellent water vapor and oxygen barrier properties, water resistance and oil resistance at a low dry weight of 8-15 g / m2. The coating system does not contain polyvinylidene chloride and perfluoro and polyfluoro alkyl substances. The paper-based material coated with the coating is easily defibered and recycled under standard alkaline warm water conditions, and the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirements.

The present invention is related to a solvent-based composition for preparing an oxygen barrier coating, comprising a binder polymer containing polar functional groups that are capable of interacting with an acidic group; an acid containing at least two reactive acidic groups; and an organic solvent. The present invention is furthermore related to a coated product comprising said oxygen-barrier coating layer, and to a method for making a coated product.

The invention discloses a high-barrier water-based paint for flexible packaging, and a preparation method and application thereof. The high-barrier water-based paint comprises two types of polyurethane resin, wherein one type of polyurethane resin is polyolefin type polyurethane which is a polyurethane dispersion formed by polymerizing polyolefin polyol and polyisocyanate; and the other one is hydroxyl-containing crystalline polyurethane which is a medium-high hydroxyl / high-crystalline polyurethane dispersion formed by polymerizing polyester polyol and polyisocyanate. The high-barrier water-based paint disclosed by the invention has excellent oxygen barrier property, moisture barrier property, adhesive force, flexibility, wettability, chemical resistance, steaming and boiling resistance and the like, and can be used for high-barrier flexible packaging of base materials such as paper and films.

The invention discloses a preparation method of a water-oxygen barrier film based on a polymer nano composite material. The preparation method comprises the following steps: step 1, organically modifying Laponite; 2, a CTAC modified Laponite-PMMA precursor solution is prepared, and the CTAC modified Laponite-PMMA precursor solution is prepared; step 3, cleaning the flexible substrate and activating the surface of the flexible substrate; 4, depositing a first layer of inorganic thin film on the flexible substrate subjected to cleaning and surface activation in the step 3, and performing surface activation on the first layer of inorganic thin film; step 5, preparing a modified CTAC-Laponite-PMMA composite film layer on the inorganic thin film layer activated in the step 4 by adopting the CTAC modified Laponite-PMMA precursor solution prepared in the step 2; and step 6, depositing a second layer of inorganic film on the modified CTAC-Laponite-PMMA composite film layer to obtain the inorganic / organic / inorganic overlapped structure water oxygen barrier film. The invention also discloses the water-oxygen barrier film prepared by the method, the bending mechanical stability of the water-oxygen barrier film is obviously improved, and research finds that the film still has good water vapor barrier performance after being repeatedly bent for 6000 times.

The invention provides a portable perovskite photovoltaic coiled material and a preparation method and application thereof. The portable perovskite photovoltaic coiled material comprises at least two photovoltaic modules, flexible perovskite solar cells of the photovoltaic modules and packaging structures arranged on the two sides of the flexible solar cells respectively. The packaging structure comprises an adhesive film and a water-oxygen barrier film which are stacked in sequence, and the water-oxygen barrier film and a protective adhesive layer on the two sides form a packaging area. The flexible perovskite solar cell and the adhesive film are both arranged in the packaging area; the protective adhesive layers between the adjacent photovoltaic modules are provided with gaps, and the flexible perovskite solar cells are connected in series and / or in parallel through the gaps between the protective adhesive layers. The portable perovskite photovoltaic coiled material is easy to fold, curl and carry, the number of modules can be increased or decreased at any time according to actual requirements, and flexible configuration and expansion are achieved.

The invention relates to the technical field of electrode paste production, and provides an anti-oxidation high-electrical-stability electrode paste and a preparation method thereof, and the electrode paste is prepared from the following raw materials: BN thick-coated coarse SiC, BN thin-coated fine SiC, carbon-coated graphite, ZrO2-carbon composite microspheres, a filler and a binder in a mass ratio of (16-19): (11-14): (29-32): (7-10): (13-16): (15-18). BN thick coating and BN thin coating are respectively carried out on the coarse SiC particles and the fine SiC particles, so that the balance of oxidation resistance and conductivity is realized; the flake graphite is subjected to light oxidation and carbon coating modification, so that electron transfer is promoted while oxygen is isolated, and the problem of conductive phase isolation possibly caused by an antioxidant layer is avoided; zrO2 at carbon composite microspheres are prepared to improve the structural stability and form a complementary anti-oxygen barrier, so that the synergistic improvement of the oxidation resistance and the conductivity of the electrode paste is realized.

A polyvinyl alcohol / nanocellulose / tannic acid iron-based high-strength food packaging material disclosed in the present invention relates to the preparation and development technology field of food packaging materials, and the materials include polyvinyl alcohol (PVA), hydrophobic quaternary ammonium salt functionalized nanocellulose (CNF-QAS) and tannic acid iron (TA-Fe), and the mass proportion of CNF-QAS is 1% to 7%, and the mass proportion of TA-Fe is 0.4% to 1% (all in terms of PVA mass). Its preparation includes using QAS for the modification of CNF and preparing CNF-QAS, adding TA-Fe after mixing with PVA, and magnetic stirring evenly, and obtaining after drying. Its macroscopic form can be a film, electrospun fiber, aerogel, paper and paperboard or used as a powder additive in pulp molding materials. The above-mentioned material has good biocompatibility, mechanical properties, water vapor and oxygen barrier properties, antibacterial properties and food preservation properties. Under near-infrared laser triggering, the material has high precision and broad-spectrum antibacterial activity; and the preparation process is both economical and simple, and can be widely used in non-directly imported foods such as fruits and vegetables.

The application discloses a degradable high-oxygen-barrier composite film and a preparation method and application thereof. The composite film is composed of polylactic acid and hybrid graphene oxide, wherein the hybrid graphene oxide is connected in a 'face-to-edge' mode by boric acidized graphene oxide and hydroxylated graphene oxide, and the mass percentage of the hybrid graphene oxide in the composite film is 0.25-1 wt%. The prepared composite film has the advantages of degradability and excellent oxygen barrier property, and has a good application background in the packaging field.

The embodiment of the invention provides a flexible perovskite photovoltaic device and a preparation method thereof. The flexible perovskite photovoltaic device comprises a perovskite photovoltaic cell layer; the water and oxygen barrier film layer at least covers the two sides of the perovskite photovoltaic cell layer, and a first water and oxygen barrier film and a second water and oxygen barrier film are formed on the two sides of the perovskite photovoltaic cell layer respectively; the elastic packaging layer coats the water-oxygen barrier film layer; the Young modulus of the above layer structure satisfies the following relation: the perovskite photovoltaic cell layer > the water oxygen barrier film layer > the elastic packaging layer. The thickness of the elastic packaging layer is larger than the thickness of the water-oxygen barrier film layer and larger than the thickness of the perovskite photovoltaic cell layer. According to the flexible perovskite photovoltaic device and the preparation method thereof provided by the embodiment of the invention, the appearance of the device or the surface of the water-oxygen barrier film is not damaged when the flexible perovskite photovoltaic device is bent for use, the photoelectric conversion efficiency is ensured, and the service life of the device is prolonged.

The present invention provides: a vapor-deposited multilayer film which has high oxygen barrier properties and high water vapor barrier properties, and has sufficient oxygen barrier properties even after a bending treatment; and the like. Provided is a vapor-deposited multilayer film comprising: a multilayer film in which a layer (A), as the outermost layer, a layer (B), and a layer (C) are stacked in this order; and a vapor-deposited inorganic layer (I) stacked on the exposed surface side of the layer (A). The vapor-deposited inorganic layer (I) is a vapor-deposited metal layer that is mainly composed of aluminum, or a vapor-deposited inorganic oxide layer that is mainly composed of alumina or silica. The layer (A) contains, as a main component, an ethylene-vinyl alcohol copolymer (a) that has an ethylene unit content of 36-60 mol%; the layer (B) contains, as a main component, an ethylene-vinyl alcohol copolymer (b) that has an ethylene unit content of 20-35 mol%; and the layer (C) contains a polyethylene or a polypropylene as a main component. The average thickness of the multilayer film is 300 µm or less.

The utility model discloses a kiln cover which comprises a cover body, a box body and a connecting pipe assembly, an opening is formed in the bottom of the cover body, the cover body is communicated with the box body, an air inlet pipe is arranged at the bottom of the box body, and combustible materials are filled in the box body and used for consuming oxygen in air entering the cover body. And the oxygen-depleted air enters the cover body to achieve the oxygen isolation effect. The box body is connected outside the cover body, and the air inlet pipe is arranged at the bottom of the box body, so that air enters the box body through the air inlet pipe at the bottom of the box body, is deoxidized by smoldering combustible materials and then enters the cover body, the deoxidizing effect is achieved, antique materials in the cover body can be rapidly cooled, the whole structure is simple, use is convenient, and practicability is high.

The application discloses a paper-based moulded coffee capsule capable of natural composting, a PHA aqueous dispersion in-situ film-forming barrier heat-sealing composite layer and a preparation method and application thereof, and belongs to the field of degradable packaging and single-cup extraction capsules. The capsule comprises a capsule body formed by moulded paper pulp, a side wall, a bottom wall and a mouth flange, a biodegradable polyester-based film sealing member sealed to the flange, and a polyhydroxyalkanoate barrier heat-sealing composite layer coated on the inner surface of the body and the sealing surface of the flange. The composite layer is obtained by in-situ film-forming of a particle size gradient double-layer aqueous dispersion, and comprises an infiltration anchoring layer located in the pores of the paper pulp and a continuous dense layer on the outside along the thickness direction. The flange is a heat-pressed densification area, and a locally thickened heat-sealing ring is formed on the sealing surface of the flange. The application realizes the moisture and oxygen barrier and interface bonding performance through physical anchoring of small particle size components and surface film-forming of large particle size components, and guarantees the brewing sealing performance.

The present invention belongs to the technical field of perovskite solar cells, and relates to a perovskite cell module including a stacked encapsulation layer and a preparation method thereof. The perovskite cell module includes a stacked encapsulation layer, and the stacked encapsulation layer is formed by an inorganic encapsulation layer, or by an organic encapsulation layer and an inorganic encapsulation layer alternately stacked on top of each other. The inorganic encapsulation layer has excellent light transmittance and excellent moisture and / or oxygen barrier performance, while the organic encapsulation layer includes different components from the inorganic encapsulation layer and complements the performance characteristics of the inorganic encapsulation layer. Therefore, the perovskite cell module has good mechanical performance and can effectively protect a perovskite solar cell from the effects of oxygen and moisture, thereby improving the lifespan and stability of the cell. Moreover, the encapsulation method involved is simple and cost-effective, and can be used for large-scale production.

The invention discloses a high-barrier anti-permeation packaging bag and a processing method thereof, and relates to the technical field of packaging bag preparation. Comprising the following raw materials in parts by mass: 150 to 200 parts of deionized water, 50 to 70 parts of polyvinyl alcohol, 3 to 5 parts of modified montmorillonite, 7.5 to 10.5 parts of carboxylated cellulose nanofiber, 3 to 8 parts of zinc-doped mesoporous silica, 3 to 5 parts of a synergist, 5 to 10 parts of glycerol and 0.25 to 0.35 part of glutaraldehyde. By introducing the synergist prepared from sodium chloroacetate, triethylamine, calcium chloride dehydrate and the like, the water vapor and oxygen barrier capacity and the antibacterial capacity of the packaging bag can be effectively improved; and due to the introduction of the modified montmorillonite, the carboxylated cellulose nanofiber, the zinc-doped mesoporous silica and other components, the water vapor and oxygen barrier ability and the antibacterial ability of the packaging bag are further improved. Therefore, the method has a wider application prospect.