412 results about "Oxygen barrier" patented technology

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 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.

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.

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.

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 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.

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 relates to the technical field of food packaging, in particular to a dual-antioxidant packaging film as well as a preparation method and application thereof. The dual antioxidant packaging film disclosed by the invention is prepared from the following components in parts by mass: 3.2 to 4 parts of starch, 0.8 to 1 part of glycerol, 0.8 to 1 part of polysaccharide, 0.02 to 0.16 part of berberine / anthocyanin self-assembled nanoparticles and 93.98 to 95.2 parts of water. The packaging film prepared by the invention is uniform in structure, has good mechanical properties and moisture and oxygen barrier properties, shows an intelligent slow release characteristic in a pH value change or oxidation environment, can realize controllable release of the tea tree essential oil, and significantly improves the antioxidant and antibacterial activity of the film. The material source is natural, renewable and biodegradable, and the environment-friendly fresh-keeping packaging material is suitable for fresh-keeping packaging of foods such as fruits, vegetables and meat products, and has good environment friendliness and industrial application prospects.

The invention relates to the technical field of high polymer materials and flame retardance, in particular to application of an efficient viscous compound material in oxygen barrier flame retardant materials, flame retardant polyolefin with hydroxyl is added into a high-shear twin-screw extruder, nano layered silicate and a reactive high polymer tackifier are sequentially added for reactive extrusion after melting, and the flame retardant polyolefin is obtained. And adding a micron-sized inorganic flame retardant and a carbon aid to the downstream of an extruder for blending, and finally cooling and pelletizing through an underwater pelletizing system to obtain the high-efficiency viscous compound material. According to the invention, a chemical bonding compatibilizing and toughening system is constructed through in-situ reaction of maleic anhydride grafted polypropylene and epoxy group functionalized SEBS, and complete stripping of nano-montmorillonite is realized by combining a step-by-step extrusion process, so that the problem that the mechanical property and flame retardance of a traditional high-filling flame-retardant material are difficult to consider at the same time is solved; the material has high limit oxygen index, high carbon residue rate and excellent tensile property, and the oxygen barrier layer is endowed with excellent mechanical toughness.

This invention discloses a flame-retardant silicone rubber for cables and its preparation method, belonging to the field of cable material technology. By copolymerizing methyl vinyl silicone rubber with flame-retardant modified spiky hollow microspheres, the flame-retardant modified spiky hollow microspheres can be fixed in the silicone rubber network. The flame-retardant modified spiky hollow microspheres themselves are inorganic high-temperature resistant ceramic materials. The hollow structure can form a physical heat insulation and oxygen barrier layer, blocking heat transfer and oxygen penetration, and delaying the thermal decomposition of the matrix. The grafted phosphorus-based flame-retardant groups and the nitrogen element of 4-aminobenzoic acid form a phosphorus-nitrogen synergistic chemical flame retardant. During combustion, a dense carbon layer is quickly generated, which inhibits flame spread, reduces heat release rate, and has excellent smoke suppression and toxicity reduction effects, meeting the stringent requirements for cable fire safety.

The invention provides a chitosan-containing coating liquid, a preparation method and an application of the chitosan-containing coating liquid in a packaging material, and relates to the field of packaging materials. The preparation method of the chitosan-containing coating liquid comprises the following steps: carrying out composite modification; the composite modification method comprises the following steps: dropwise adding a pre-oxidized dextran solution into a carboxymethyl chitosan solution, and adjusting the pH value to 7; continuously stirring and dropwise adding the mixed precursor solution to obtain a mixed solution; and reacting the mixed solution in an intermittent microwave environment at 57-60 DEG C, centrifugally washing, and uniformly mixing and dispersing with deionized water and glycerol to obtain the chitosan-containing coating solution. According to the chitosan-containing coating liquid disclosed by the invention, the mechanical strength and brittleness of a film layer after the coating liquid is coated to form a film can be effectively improved; the problems that a film layer is poor in water resistance and easy to swell and lose efficacy in a water-containing environment or a humid environment are solved; the antibacterial spectrum of the film layer is further widened, and the antibacterial property, antibacterial durability and oxygen barrier property of the film layer are improved.

A composition is described, which when applied to paper, cardboard or other cellulose based composites used in packaging, provides a layer that is oil resistant, moisture resistant and provides an effective oxygen barrier layer. The composition is comprised of a modified polyester polymer and may be applied as an aqueous emulsion or out of a solvent system. The coated substrate after being used is compostable, repulpable, recyclable and biodegradable.

The application discloses a kind of building fire carbon hydrogen pool fire-resistant cable, it is related to cable technical field, including outer sheath and the oxygen barrier layer that is laid on the inner wall of outer sheath, several copper conductors are evenly installed in the oxygen barrier layer inside around its axis, copper conductor is wrapped with fire resistance layer, and the insulating layer is wrapped outside fire resistance layer;Oxygen barrier layer inside is also provided with filling.The filling section is circular and is attached with each insulating layer;Adjacent insulating layers are attached with each other, and each insulating layer is attached with the inner wall of oxygen barrier layer.The building fire carbon hydrogen pool fire-resistant cable provided in the application compared with traditional fire-resistant cable, its filling layer is only located at the center position of cable, and oxygen barrier layer inside space is not completely filled, i.e. there is still gap between adjacent conductors, and there is also gap between conductor and oxygen barrier layer.Such, the resistance generated when cable deforms is smaller, cable can produce larger bending, and the range of application is wider.

This invention belongs to the field of cable technology, specifically a thin-walled oxygen-barrier high-temperature resistant cable, comprising a conductor core and a thin-walled outer sheath. The conductor core has a high-temperature resistant insulation layer made of polyetheretherketone (PEEK) composite material on its outer side. Between the high-temperature resistant insulation layer and the thin-walled outer sheath, from the inside out, are sequentially arranged a ceramicized oxygen barrier layer and a flame-retardant reinforcement layer. The ceramicized oxygen barrier layer is a nano-modified ceramicized silicone rubber layer with a thickness of 0.05–0.15 mm, including an outer layer doped with silicon carbide whiskers and an inner layer doped with zinc borate. This invention prepares an ultra-thin ceramicized layer through gradient doping, resolving the contradiction between thin-walled design and oxygen barrier properties, and effectively improving the interfacial peel strength. This reduces the cable's outer diameter and bending radius, making the cable lightweight and suitable for high-dynamic applications.

This invention discloses an amino compound containing a carbazole derivative and its synthesis method, as well as a perovskite solar cell and its preparation method, belonging to the field of solar cell technology. The general chemical formula of the amino compound of this invention is as follows: Wherein: R1 is a straight-chain alkyl group, with 3 to 4 carbon atoms; R2 is a straight-chain alkyl group, with 3 to 4 carbon atoms. Based on the introduction of long-chain alkyl groups and carbazole groups, both water and oxygen barrier properties and electron transport capabilities can be improved simultaneously, thereby enhancing the stability and photoelectric conversion efficiency of perovskite solar cells and solving the problem of poor stability in existing perovskite systems.

The utility model relates to oxygen barrier film production technical field, concretely is a kind of winding device for agricultural oxygen barrier film production, including fixed plate, the top end equidistance arrangement fixed connection of fixed plate has material conveying roller, guide roller, fixed frame and winding frame, the both ends of material conveying roller are respectively fixedly connected with moving block, the top end fixed connection of moving block has spring.The utility model, by setting cleaning component, air pump runs and generates suction, suction pipe is transported to the suction in connecting pipe with the running of air pump, dust suction port in connecting pipe one end connecting plate under the action of suction force dust on film is extracted, extracted dust is transported to dust collecting box in connecting pipe and is stored, cleaning brush fixed in the both sides of connecting plate is cleaned again to film, can carry out comprehensive cleaning to dust and particle on film, improve the oxygen barrier property of film and the convenience of subsequent work.

The utility model belongs to fire -resistant cable technical field, concretely is a kind of ceramic oxygen barrier fire -resistant cable, including protective outer cover, the outer surface sliding connection of protective outer cover has metal armoured cover, the inner wall fixedly connected with oxygen barrier sleeve of protective outer cover, the inner wall of oxygen barrier sleeve is fixedly connected with rock wool rope cover and ceramic silicon rubber fire -resistant cover respectively, the inner wall of rock wool rope cover and the outer surface of ceramic silicon rubber fire -resistant cover contact, the inside of ceramic silicon rubber fire -resistant cover is provided with two groups of conducting wire, specifically the utility model first through the sliding of protective outer cover cooperation metal armoured cover, can with cable outer surface protection, and can reduce the transmission of heat, oxygen barrier sleeve cooperation rock wool rope cover is used simultaneously, can prevent high temperature to cable interior transmission, and can prevent the further development of combustion, then through ceramic silicon rubber fire -resistant cover, can prevent flame continue to burn inwards, play good fireproofing and heat insulation effect, further can make cable whole body can stably use.

The invention discloses a high-barrier two-component solvent-free polyurethane adhesive and preparation and application methods thereof. The high-barrier two-component solvent-free polyurethane adhesive comprises a component A and a component B. The component A comprises, by mass, 30-60% of aromatic polyester polyol and 40-70% of diisocyanate. The component B comprises a mixture of 50 to 70 percent by mass of aromatic polyester polyol, 5 to 20 percent by mass of rosin resin and 20 to 40 percent by mass of polyoxypropylene polyol. The composite film has high bonding strength and is suitable for bonding various aluminized soft package composite structures, the composite film has high barrier property, and the oxygen barrier value is lower than 10 cc / m < 2 >-day.

The invention discloses a medicinal composite hard tablet and a preparation method thereof. On one hand, the invention provides a medicinal composite hard sheet which comprises an outer-layer sheet and an inner-layer sheet, the outer layer sheet is prepared from the following raw material components in parts by mass: 100 parts of PET resin, 30 to 40 parts of IPDI polyurethane prepolymer, 6 to 10 parts of compatilizer, 4 to 8 parts of nano titanium dioxide, 4 to 8 parts of silicone powder, 30 to 36 parts of nano montmorillonite and 24 to 30 parts of carbon black; the inner-layer sheet is prepared from the following raw material components in parts by mass: 30 to 40 parts of medium-density PE resin, 50 to 60 parts of low-density PE resin and 12 to 18 parts of nano titanium dioxide. On the other hand, the invention further provides a preparation method of the medicinal composite hard tablet. The composite hard sheet disclosed by the invention is excellent in oxygen barrier property, excellent in moisture resistance and humidity resistance, excellent in ultraviolet light barrier property, relatively excellent in shading property and low in cost.

The invention relates to an edge sealing adhesive tape for a photovoltaic module and the photovoltaic module packaged by the edge sealing adhesive tape. The photovoltaic module is provided with a front cover plate and a rear cover plate which are oppositely arranged, the edge sealing adhesive tape comprises a water blocking layer and an oxygen blocking layer tightly bonded with the water blocking layer, and the bonding strength between the water blocking layer and the front cover plate and the bonding strength between the water blocking layer and the rear cover plate are larger than 40 N / cm; the oxygen barrier layer comprises a core layer and auxiliary layers symmetrically adhered to the two sides of the core layer; the bonding strength between the surface of one side, deviating from the oxygen-resistant layer, of the water-resistant layer and the front cover plate and the rear cover plate is greater than 40N / cm; the surface energy of the surface of the side, away from the water-blocking layer, of the oxygen-blocking layer is smaller than 36 mN / m. Thus, the edge sealing adhesive tape forms three-dimensional protection on the photovoltaic module, water vapor and oxygen are prevented from entering the photovoltaic module, and the life cycle of the photovoltaic module adopting the edge sealing adhesive tape is prolonged.

This utility model discloses a novel surface co-extrusion device for heating pipes with an oxygen barrier layer, relating to the field of heating pipe manufacturing technology. The utility model includes a conveying chamber, a cooling jacket, and a discharging sleeve. A forming sleeve is fixed to one end of the conveying chamber, a cooling jacket is fixed to the end of the forming sleeve away from the conveying chamber, a heat insulation plate is fixed to the end of the cooling jacket away from the forming sleeve, and a discharging sleeve is fixed to the end of the heat insulation plate away from the cooling jacket. A homogenizing plate is fixed in the middle of the conveying chamber, and a central shaft is fixed through the center of the homogenizing plate along its central axis. The central shaft is fixed inside the conveying chamber. Homogenizing holes are uniformly opened throughout the homogenizing plate. An inner filter sleeve is fixed inside the discharging sleeve. This utility model, by setting up the conveying chamber, cooling jacket, and discharging sleeve, solves the problem that during the surface co-extrusion of heating pipes with an oxygen barrier layer, the high surface temperature of the pipe base material and the high fluidity after bonding with the oxygen barrier layer cause uneven thickness of the oxygen barrier layer, and the insufficient uniform forming pressure of the heating pipe.

The invention discloses a dihydromyricetin enhanced gutta-percha / polylactic acid composite active packaging film and a preparation method thereof. According to the film, gutta-percha and polylactic acid are used as base materials, raspberry tea dihydromyricetin is used as an active component, and synergistic improvement of mechanical properties and biological activity is achieved. The specific preparation method comprises the following steps: dissolving gutta-percha in a first organic solvent to prepare a solution A; polylactic acid and a plasticizer are dissolved in a second organic solvent to prepare a solution B; and mixing the solution A and the solution B, adding dihydromyricetin, carrying out a stirring reaction, and carrying out film casting. The obtained film is faint yellow and semitransparent, the thickness is 30-40 microns, the tensile strength is larger than or equal to 33 MPa, the elongation at break is larger than or equal to 280%, and the good water vapor and oxygen barrier property is achieved. Benefited from the addition of dihydromyricetin, the film has remarkable bacteriostatic activity on escherichia coli and staphylococcus aureus, the DPPH free radical scavenging rate can reach 92.6%, the comprehensive performance is remarkably superior to that of a gutta-percha / polylactic acid composite film, and the gutta-percha / polylactic acid composite film has important application potential in the field of active packaging of food and agricultural products.

The present invention relates to a barrier red algae fiber, a method for preparing the same, and a barrier coated paper and a barrier sheet comprising the same. The barrier coated paper according to the present invention not only has better oxygen barrier properties and dehydration properties during a coating process than conventional wood derived nanocellulose, but is also environmentally friendly because it has biodegradable properties.