13results about How to "Improve oxygen barrier performance" patented technology

The invention relates to the technical field of barrier films, and particularly discloses an ultrahigh water and oxygen barrier film for a vehicle-mounted OLED display product. The thickness of the ultrahigh water and oxygen barrier film is 15-35 microns, and the ultrahigh water and oxygen barrier film sequentially comprises a first antistatic layer, a first barrier layer, an OLED working layer, a second barrier layer, a polyethylene glycol terephthalate layer and a second antistatic layer, the thickness ratio of the first antistatic layer to the first barrier layer to the OLED working layer to the second barrier layer to the polyethylene glycol terephthalate layer to the second antistatic layer is (2-4): (2-4): (8-16): (2-4): (4-8): (2-4). The first barrier layer and the second barrier layer are prepared from the following raw materials in parts by mass: 1-2 parts of cholesterol, 5-15 parts of phospholipid, 1-2 parts of N-acryloyl glycinamide, 1-2 parts of graphene oxide, 0.01-0.1 part of a photoinitiator, 1-2 parts of hydroxypropyl methyl cellulose, 1-5 parts of fluorinated ethylene propylene, 1-5 parts of tetra-n-butyl titanate and 1-2 parts of a surfactant.

The invention discloses a polyvinyl chloride plastic material and a preparation method thereof, and the polyvinyl chloride plastic material comprises the following components by weight: 100 parts of a polyvinyl chloride matrix; 5 to 10 parts of light response type nano particles with # imgabs 0 # as a core and # imgabs 1 # as a shell; 2-8 parts of a halogen ion carrier type mesoporous material; 1-5 parts of a halogen free radical trapping agent; and 1-3 parts of a layered barrier material. According to the technical scheme, the technical problems that in the prior art, a polyvinyl chloride material is prone to light aging in a marine environment, and micro-plastic pollution is generated are solved.

The invention discloses a food packaging bag and a preparation method thereof, and belongs to the technical field of packaging bags, the food packaging bag is prepared from the following raw materials in parts by weight: 28-38 parts of polylactic acid, 2-12 parts of poly-2, 5-butylene furandicarboxylate, 2-5 parts of POSS-based compatibilizing component and 0.6-1.2 parts of modified zero-valent nano-iron, the preparation method of the packaging bag comprises the following steps: mixing the polylactic acid, the poly-2, 5-butylene furandicarboxylate, the POSS-based compatibilizing component and the modified zero-valent nano-iron, and uniformly stirring; the preparation method comprises the following steps: respectively drying 1, 3, 5-butylene furandicarboxylate in an oven at 80 DEG C for 12 hours, then adding the dried 1, 3, 5-butylene furandicarboxylate, the POSS-based compatibilizing component and the modified zero-valent nano-iron into a mixer, stirring for 30 minutes, transferring into a screw extruder, carrying out melt extrusion to obtain composite material particles, preparing the composite material particles into a food packaging film by adopting a tape casting method, and then cutting to obtain the food packaging bag. The packaging bag not only has good biodegradability, but also has good mechanical properties and an excellent fresh-keeping effect.

The invention belongs to the technical field of high polymer materials, and provides a polylactic acid composite material with a Pickering microsphere interwoven structure and a preparation method of the polylactic acid composite material. The method specifically comprises the following steps: carrying out TEMPO oxidation reaction on bacterial cellulose, then carrying out nanocrystallization treatment, emulsifying an obtained oxidized nano bacterial cellulose aqueous suspension and a poly (3-hydroxybutyrate-co-3-hydroxyvalerate) composite organic solution of a polylactic acid main material, drying, and carrying out hot pressing to obtain the polylactic acid-poly (3-hydroxybutyrate-co-3-hydroxyvalerate) composite material. According to the invention, on the basis of the amphiphilic characteristic of the oxidized nano bacterial cellulose, hydrophobic modification is not needed, a polylactic acid system structure is stabilized in the composite material through network sphere interweaving by using a Pickering emulsification microsphere method, polylactic acid heterogeneous nucleation is induced by the nano size to promote crystallization, and the mechanical strength, heat resistance and barrier property of polylactic acid are improved. Meanwhile, by adding the biopolyester PHBV, the toughness and barrier property of the polylactic acid composite material are enhanced, and the biodegradability is maintained.

The invention discloses a toughened modified oxygen barrier material and a flexible PE-RT oxygen barrier pipe. The oxygen barrier material is prepared from LLDPE, POE, modified dolomite powder, a coloring agent, an antioxidant and an ethylene-vinyl alcohol copolymer according to a certain ratio. The PE-RT oxygen barrier pipe is formed by co-extrusion of an inner plastic layer, a hot melt adhesive layer and an oxygen barrier outer layer, the inner plastic layer is formed by extrusion of raw materials including 100 parts by mass of PE-RT and 1-3 parts by mass of color master batch, the hot melt adhesive layer is formed by extrusion of PE hot melt adhesive, and the oxygen barrier outer layer is formed by extrusion of the toughened and modified oxygen barrier material. According to the prepared oxygen barrier pipe, the bending performance of the oxygen barrier layer is improved, the bending modulus is reduced, the problems that a PE-RT oxygen barrier pipe is difficult to bend, large in construction difficulty and the like are effectively solved, and meanwhile the oxygen barrier performance of the oxygen barrier pipe is further improved.

The invention discloses a high-light high-brightness oxygen-resistant PERT pipe and a preparation method thereof, and relates to the field of polyethylene pipes, the high-light high-brightness oxygen-resistant PERT pipe comprises an inner layer and an outer layer made of PERT materials, and an oxygen-resistant layer connecting the inner layer and the outer layer, and the oxygen-resistant layer is mainly made of a blending material of TLCP and PE. A blending modified material of TLCP and PE is adopted as the oxygen barrier layer, compatibility between TLCP and PE is fully utilized, interface bonding of the oxygen barrier layer, the inner layer and the outer layer is achieved, the process of adding an adhesive layer co-extrusion layer is reduced, the production process is simplified, meanwhile, a macromolecular chain structure of TLCP is regular and easy to orientate, an effective oxygen barrier can be formed in the blending material, and the oxygen barrier performance is improved. Therefore, the oxygen barrier performance of the pipeline is further improved.

The application belongs to the field of food preservation technology, and relates to a chitosan-gelatin composite preservative solution based on plasma-activated water modification and a preparation method and application thereof. First, PAW is used to prepare chitosan solution and gelatin solution respectively, and the composite preservative solution is obtained after mixing and homogenizing. The coating is dehydrated to form a preservative film. The PAW is prepared by treating deionized water with low-temperature plasma, and is rich in active ingredients such as hydroxyl radicals and hydrogen peroxide, which can effectively modify chitosan and gelatin, enhance intermolecular crosslinking, and form a composite film with a dense network structure. The composite film can be applied to fish preservation through coating or immersion, can effectively inhibit the growth of microorganisms, and can improve the color of fish fillets. In addition, the composite film has the function of delaying protein degradation by inhibiting endogenous protease activity, thereby maintaining the muscle tissue structure and prolonging the shelf life of chilled fish fillets. The application has the advantages of simple process, green safety, remarkable preservation effect, and wide market application prospect.

The invention relates to the technical field of adhesives, in particular to a food packaging adhesive containing bio-based polyester polyol as well as a preparation method and application of the food packaging adhesive. The adhesive comprises a component A and a component B, the component A is prepared from the following components in parts by weight: 40 to 55 parts of bio-based polyester polyol, 1 to 3 parts of chain extender, 6 to 7 parts of modified inorganic nano oxide and 0.01 to 0.05 part of catalyst; and the component B comprises an isocyanate curing agent. The adhesive provided by the invention has excellent peel strength and boiling resistance, and also has certain oxygen barrier property.

The invention relates to the technical field of materials. The invention discloses a preparation method of a graphene oxide / poly (L-lactic acid-co-itaconic acid butanediol ester) copolymer. The preparation method comprises the following steps: S1, preparing a prepolymer of unsaturated poly (itaconic acid-co-butanediol ester); s2, preparing graphene oxide grafted oligomeric (L-lactic acid); and S3, under the assistance of a catalyst (TsOH. H2O and SnCl2. 2H2O), carrying out a melt polycondensation reaction between the prepolymer of the unsaturated poly (itaconic acid-co-butylene glycol ester) and the graphene oxide grafted oligomeric (L-lactic acid) to form a target copolymer. The graphene oxide is used as an initiator, unsaturated poly (itaconic acid-co-butylene glycol ester) is used as a flexible chain segment, and the thermal stability, the gel content, the transparency, the mechanical property, the anti-aging property and the barrier property of the PLLA film are synergistically improved. Therefore, the invention provides an important research thought and direction for developing the polylactic acid nano composite material with adjustable flexibility, excellent oxygen barrier performance, high thermal stability, strong ultraviolet resistance and relatively high transparency, and shows remarkable industrial application potential and value.

The utility model discloses a flexible plastic pipeline oxygen resistance comparison test evaluation platform, which comprises a vacuum degassing deaerator, a copper water segregator, a copper water collector, an oxygen bottle and a group of test barrels, a water outlet of the vacuum degassing deaerator is connected with a water inlet of the copper water segregator through a steel pipe, each water outlet of the copper water segregator is divided into two paths, according to the first path, a water outlet of the copper water segregator is connected with a water return port of the testing barrel through a pipeline, a water outlet of the testing barrel is connected with a water inlet of the copper water collector through a pipeline, and a water outlet in the side portion of the copper water collector is connected with a water return port in the side portion of the vacuum degassing and deoxidizing machine through a pipeline. Circulation is carried out in an oxygen-enriched environment in the test barrel, the content of oxygen in the pipeline is detected through the online dissolved oxygen meter, and if data detected and displayed by the dissolved oxygen meter is small, the oxygen content of the detected pipeline is low, and the oxygen blocking effect of the pipeline is good; if the data detected and displayed by the dissolved oxygen meter is large, the oxygen content of the detected pipeline is high, and the oxygen blocking effect of the pipeline is poor.

This invention relates to the field of special high-temperature resistant cable technology, and in particular to a multi-level collaborative protection high-temperature cable with self-sensing early warning and active heat dissipation functions. It includes an intelligent sensing soft conductor core, which is sequentially covered with an active oxygen barrier buffer layer, a phase change energy storage-thermal conductive composite insulation layer, and a microchannel active heat dissipation protective layer. This invention achieves precise positioning and coaxial distribution of the sensing fiber by adding an optical fiber positioning and limiting component to the intelligent sensing soft conductor core, avoiding data distortion caused by fiber misalignment and compression. Combined with a femtosecond laser micro-damage thermal regeneration grating thermal sensing fiber and a zirconia fiber oxygen sensor, it can monitor the conductor temperature field and oxygen permeation status in real time and accurately, transforming the hidden oxidation aging process into quantifiable data trends, achieving early warning of failure, and preventing sudden failures.

This application discloses a high-barrier aluminized composite film for integrated circuit packaging and its preparation method, belonging to the field of metal coating. The high-barrier aluminized composite film for integrated circuit packaging includes a first aluminized PET layer, a first adhesive layer, a second aluminized PET layer, a second adhesive layer, a BOPA layer, a third adhesive layer, and a PE layer arranged sequentially. The aluminized surfaces of the first and second aluminized PET layers are bonded together by the first adhesive layer, which is formed by curing a polyurethane-acrylate base agent and a curing agent. This application has the advantage of obtaining an aluminized composite film with good oxygen and moisture barrier properties and mechanical properties.

The invention discloses an oxygen barrier coating, a preparation method thereof, a packaging material and a package, and belongs to the technical field of food packaging. The preparation method of the oxygen barrier coating comprises the steps that multiple layers of coating are carried out on the surface of a base material at the same time, drying is carried out while coating is carried out, the oxygen barrier component in coating slurry used for coating each layer is PVA, and the number of coating layers is at least two. The preparation method is easy, convenient and environment-friendly to operate, multi-layer coating and drying are carried out on the surface of the base material at the same time by adopting the coating slurry with PVA as an oxygen barrier component, on one hand, the coating can have good uniformity, and on the other hand, the coating can have high binding force. In addition, compared with an existing EVOH co-extrusion mode, the PVA coating mode has the advantages that the cost is reduced, and meanwhile, the oxygen resistance and the tensile resistance of the coating are improved.