94 results about "Oxygen penetration" patented technology

The invention discloses a high-oxidation-resistance long-life polyethylene cable sheath material and a preparation method thereof, and relates to the technical field of high polymer materials. Comprising the following components: high-molecular-weight high-density polyethylene, surface-modified nano-dioxide, furan-maleimide grafted polyethylene, a Schiff base dynamic cross-linking agent, tea polyphenol grafted polyethylene, a temperature-responsive oxygen-blocking microcapsule, a main antioxidant, an auxiliary antioxidant, an emergency antioxidant, a light stabilizer, a halogen-free flame retardant, a processing aid and an acid absorbent. According to the invention, the main antioxidant, the auxiliary antioxidant and the tea polyphenol grafted polyethylene form a chemically synthesized and naturally modified composite antioxidant system, the designed service life of the material is greatly prolonged, the temperature-responsive oxygen-blocking microcapsule automatically cracks to release the core material when the operating temperature of the cable is greater than or equal to 90 DEG C, a dynamic oxygen-blocking layer is formed, and the service life of the cable is prolonged. The defect that the effect of traditional physical oxygen barrier is attenuated at high temperature is overcome, and the oxygen permeability at high temperature is reduced compared with that of a single nano barrier scheme.

The invention relates to a coal-based composite oxygen-barrier spraying material as well as a preparation method and application thereof, and belongs to the technical field of mine safety equipment. The coal mine by-product coal slime is used as a main body material, the water glass is combined as a binder, and the proportioning process is optimized, so that the composite spraying slurry with low cost and high oxygen resistance is formed, and the problems of serious material pollution, high cost and poor environmental compatibility in the existing coal pile spontaneous combustion prevention and control technology are solved. The material forms a compact coating layer on the surface of a coal pile, oxygen permeation is effectively isolated, the spontaneous combustion critical temperature of the coal pile is remarkably increased, the oxygen concentration in the coal pile is reduced to 6% or below, and meanwhile pollution of a traditional spraying agent to the coal quality and the working environment is avoided. In addition, the low-price coal slime is used for replacing a high-price flame-retardant material, value-added utilization of by-products in coal sales is achieved, and triple advantages of fireproof safety, environmental protection and economic efficiency improvement are achieved.

The invention relates to the technical field of perovskite solar cell functional thin film packaging, in particular to a solar cell with a perovskite active layer packaged by a double-sided thin film and a preparation method of the solar cell. Al2O3 is used for depositing a layer of Al2O3 thin film between the perovskite active layer and a P-type carrier transport layer (hole transport layer HTL); a layer of SiO2 thin film is deposited between a perovskite active layer and an N-type carrier transport layer (electron transport layer ETL), and a double-sided thin film wrapping layer is formed by an Al2O3 thin film and the SiO2 thin film; through the design and preparation method of the Al2O3 / SiO2 double-sided thin film packaging perovskite active layer, the core stability problem of the perovskite active layer is effectively solved. The double-sided packaging structure can efficiently block water and oxygen permeation, and the perovskite is prevented from being decomposed due to water and oxygen erosion; meanwhile, diffusion of metal electrode ions to a perovskite layer and migration of halogen ions in perovskite to the electrode can be inhibited, bidirectional damage is reduced, and the sensitivity of perovskite to water and oxygen and performance degradation caused by interface ion migration are relieved fundamentally.

The invention discloses a vertical sintering method for improving EuBCO high-temperature superconducting target material component uniformity, and belongs to the field of superconducting target material preparation. The cylindrical EuBCO target blank is vertically fixed to the center of an alumina crucible, the axis of the cylindrical EuBCO target blank is made to be perpendicular to the bottom face of the crucible, and sintering is conducted in the oxygen atmosphere at the temperature of 900-950 DEG C. Traditional surface contact is replaced by point / line contact, the contact area is reduced by more than or equal to 80%, and the gas diffusion retardation effect of the contact surface is eliminated; meanwhile, oxygen permeation and CO2 diffusion are enhanced through the exposed side faces, and generation of impure phases such as BaCO3 and BaCuO2 is inhibited. The XRD contact ratio of the two end faces of the sintered target material is larger than 99%, and the problem of composition segregation caused by traditional horizontal sintering is solved. The method does not need a crucible coating or an isolating layer, and is low in cost and free of secondary pollution.

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.

Provided is an ion exchange membrane container in which an ion exchange membrane in a saturated water-containing state is packaged in a sheet having an oxygen permeability of 30 cc / (m2d∙atm) or less and water vapor permeability of 0.8 g / (m2∙d) or less.

The utility model belongs to the field of packaging films, particularly relates to a heat-insulating aluminum foil packaging film for food packaging, and aims to solve the problems that the quality guarantee period of food is shortened and the freshness and the quality of the food are reduced as the food is easily affected by light aging and oxidative deterioration due to the fact that the conventional packaging film is lack of effective barrier to ultraviolet rays and oxygen. According to the scheme, the film comprises a supporting frame and a winding drum, the winding drum is wound with a film body, and the film body comprises an ultraviolet-proof layer, a waterproof layer, an oxygen barrier layer, a protective layer, an aluminum foil layer, a contact layer and an antibacterial layer; the cutting assembly is arranged on the supporting frame and used for facilitating segmented cutting of the film body. Through the arrangement of the ultraviolet-proof layer and the oxygen barrier layer, the protection performance of the heat insulation aluminum foil packaging film for food packaging is effectively improved, damage of ultraviolet rays to food can be blocked, oxygen permeation can be prevented, and therefore the shelf life of the food is prolonged, and the freshness and quality of the food are kept.

The invention belongs to the technical field of functional ceramic manufacturing, and particularly relates to a high-entropy cobalt-based perovskite oxygen permeation membrane material and a preparation method and application thereof. According to the invention, La0. 5Sr0. 5CoO3 is used as a base material, and three different lanthanide elements of neodymium, gadolinium and praseodymium are doped at the site A of the base material, so that a series of high-entropy oxygen permeation membranes with carbon dioxide resistance and high stability are synthesized. The high-entropy cobalt-based oxygen permeation membrane material prepared by the method is compact in surface, has no obvious cracks, defects and through holes, has excellent mechanical properties, and can stably exist in low-oxygen corrosive atmospheres such as He / CO2 for 100 hours. Meanwhile, the high-entropy cobalt-based oxygen permeation membrane material prepared by the method has good oxygen permeation performance. A new way is provided for improving the structure and oxygen permeation stability of the OTM, and the carbon dioxide capture and storage efficiency of the OTM in the oxygen-enriched combustion technology is further improved.

The invention relates to a Polyethylene-based arrangement (8) with a thickness of less than 250 µm for the storage of grain, silage, warm or wet industrial products, comprising at least one outer layer (1), at least one inner layer (7) and only one barrier layer (5). The arrangement (8) comprises at least one PE based functional layer (3) to reduce the oxygen permeability of the polyethylene-based arrangement (8) to less than 50 cm3 / m2 d bar according to ASTM D3985.

The invention relates to the technical field of polymer composite materials, and discloses a composition for a polyurethane composite adhesive, the polyurethane composite adhesive and application of the polyurethane composite adhesive. The composition contains a component A and a component B, on the basis of the total mass of a raw material composition A forming the component A, the raw material composition A contains polyether polyol I, polyester polyol I and polyisocyanate; on the basis of the total mass of the raw material composition B forming the component B, the raw material composition B contains polyether polyol II, polyester polyol II, a chain extender and an auxiliary agent; the chain extender is a combination of a main chain UPy chain extender capable of enabling the main chain of the polymer to contain a ureido pyrimidone group and a side chain UPy chain extender capable of enabling the side chain of the polymer to contain a ureido pyrimidone group. The polyurethane composite adhesive provided by the invention is applied to a composite membrane for an asphalt waterproof coiled material, and can effectively prevent oxygen permeation, reduce the oxygen permeation rate and isolate oxygen.

Aiming at the problems of poor perovskite crystal quality, serious lead iodide residue, phase separation and the like in a high-humidity environment in the prior art, the preparation method comprises the following steps: adding 0.5-30mM of di-tert-butyl dicarbonate (BOC) into a lead iodide precursor solution, and carrying out coating and annealing treatment to obtain a perovskite layer; bOC is decomposed, and a gas phase barrier is formed in the perovskite crystallization process, so that moisture and oxygen permeation is effectively blocked, and high-quality crystallization of the perovskite thin film is realized. According to the method, BOC is used for gas-phase-assisted regulation and control of perovskite crystallization for the first time, the key technical problem of preparation of the perovskite solar cell in a high-humidity air environment is solved, and a reliable scheme is provided for low-cost and large-scale industrial application of the perovskite solar cell.

The invention relates to a method for separating gases which comprises:a first step in which a gas fuel stream comprising combustible substances that produce gas products when oxidised, and an oxygen-rich inlet stream are passed through at least two modules of oxygen-separating ceramic membranes, such that the two streams come into contact through the membranes and exchange heat;a second step of selective diffusion of oxygen from the oxygen-rich stream to the fuel stream, such that the outlet streams from the membrane modules are an oxygen-depleted or completely oxygen-free stream and a partially or completely oxidised stream; anda third step of recovery of at least two separate outlet streams of at least two gases selected from oxygen, nitrogen, carbon dioxide and hydrogen.

The present invention relates to copper foil, electrodes containing the same, secondary batteries containing the same, and methods for manufacturing the same, which can prevent problems arising from the limitations and shortcomings of related technologies. [Solution] One embodiment of the present invention includes a copper film having a matte surface and a shiny surface, and a protective layer on the copper film, wherein the oxygen permeability is 0.7 cc / (m 2 A copper foil is provided with an oxygen permeability of less than or equal to (day·atm). The oxygen permeability is measured using a permeability measuring device in accordance with ASTM D3985.

The application discloses a kind of municipal road garbage quick degradation composting device, it is related to municipal road garbage processing technical field, including composting tank and composting mechanism;The composting mechanism includes stirring structure and ventilation component;The ventilation component includes heating pipe, filter box, first connector, main ventilation pipe, first air duct and secondary ventilation pipe;Through the composting tank and composting mechanism of being set, rotating pipe, stirring paddle, screw sleeve and first helical blade are used in cooperation, garbage is fully turned over, and also through the helical pushing action of first helical blade, the accumulation pressure of garbage under the action of gravity is reduced, the porosity of composting material is effectively guaranteed, and the basic space condition is provided for oxygen penetration and microbial metabolism, rotating pipe, ventilation groove and ventilation hole are used in cooperation, oxygen is uniformly penetrated into material inside, cooperation stirring action guides material to turn over, further improves gas-solid contact efficiency, significantly improves composting degradation efficiency, and improves composting quality.

The invention provides a composite material and a preparation method thereof, and belongs to the technical field of permanent magnet powder materials. The composite material comprises an inner core, a barrier layer and a functional layer, the surface of the inner core is coated with the barrier layer, the surface of the barrier layer is coated with the functional layer, the inner core is made of permanent magnet powder, the barrier layer is made of at least one metal oxide, and the functional layer is made of at least one of Cu, CuO, AlF3 and MgF2. The surface of the permanent magnet powder is sequentially coated with the barrier layer and the functional layer, the effects of blocking water and oxygen permeation, promoting the subsequent sintering effect and optimizing grain growth and a grain boundary structure can be achieved on the premise that the chemical integrity of a magnetic phase (a main crystal phase) is not sacrificed, and the water and oxygen resistance, the corrosion resistance, the magnetic performance and the dispersity of the composite material can be improved.

To provide a multilayer film that has high oxygen permeability and can be heat-sealed to form a container that is resistant to tearing from impacts such as dropping when it contains liquid. [Solution] A heat seal layer comprising copolymer A, which is a copolymer of 4-methyl-1-pentene and propylene, further comprising copolymer B, which is a copolymer of ethylene and an α-olefin having 3 to 20 carbon atoms, or copolymer C, which is a copolymer of propylene and an α-olefin (excluding propylene) having 2 to 20 carbon atoms; and a core layer comprising (co)polymer D, which is a 4-methyl-1-pentene (co)polymer, wherein the film impact strength measured from the opposite side of the heat seal layer in accordance with ASTM-D 3420:2021 is 7 kJ / m or more, and the oxygen permeability at 23°C is 3.0 L / (m 2 ·24h·atm) or more 100.0L / (m 2 Multilayer film with a temperature of 24 hours (atm) or less.

This invention relates to a wear-resistant and high-temperature resistant composite coated band saw blade, its preparation method and application. Through the synergistic optimization of the three-layer coating structure and composite deposition process, it fundamentally breaks through the bottleneck of the existing technology and has the following advantages: (1) Gradient transition layer: Through the composition gradient design of TiN / AlTiN / HfN, the difference in thermal expansion coefficient between the matrix and the core layer is matched, significantly improving the interfacial bonding force and effectively alleviating the thermal stress concentration during high-temperature sawing; (2) Superhard core layer: PcBN is used as the wear-resistant skeleton, HfC is used as the toughening phase, graphene is used as the interfacial reinforcement phase, and Ti-Cr-Ni alloy is used as the bonding phase to achieve the multi-effect synergy of "superhard + toughening + high-temperature oxidation resistance"; (3) Self-lubricating surface layer: The composite coating is used as a friction reduction barrier to reduce the friction coefficient to below 0.12, while isolating oxygen penetration and further improving the high-temperature oxidation resistance of the coating.

The application provides a long-life anti-ultra-high-temperature cycle ablation coating on the surface of carbon / carbon composite material and a preparation method thereof, and solves the problems of a narrow ablation-resistant temperature range, poor anti-cycle thermal shock performance and difficulty in reuse of the coating. The coating is (Hf, Zr)C-La2O3, wherein the addition of La2O3 can inhibit the transformation of HfO2, ZrO2 and (Hf, Zr)O2 oxides from tetragonal phase to monoclinic phase, retain part of the tetragonal phase, weaken the cracks caused by phase transformation or even shedding, and thus improve the ablation resistance of the (Hf, Zr)C coating. In addition, the melting point of La2O3 is lower than the ablation temperature, and the phase is in a molten state during the ablation process. An appropriate amount of La2O3 can not only serve as a molten phase to heal the cracks and pores in the coating, but also can form a La-doped (Hf, Zr)O2 oxide film with a dense structure through solid solution reaction with (Hf, Zr)O2, further densify the surface of the coating, effectively block the penetration of oxygen during the ablation process, and inhibit the phase transformation of the oxide film.

To provide a desulfurization apparatus capable of treating hydrogen sulfide while suppressing a decrease in methane gas concentration in biogas.SOLUTION: A desulfurization apparatus 16 biologically treats hydrogen sulfide in biogas generated by methane fermentation processing of organic wastewater or organic waste using sulfur-oxidizing bacteria, and includes: a reaction tank 20 to which the biogas is supplied; a non-porous hollow fiber membrane 22 installed in the reaction tank 20; an oxygen-containing gas supply device 24 that supplies an oxygen-containing gas to the hollow fiber membrane 22; an oxygen-containing gas exhaust pipe 26 that exhausts the oxygen-containing gas from the hollow fiber membrane 22 to the outside of the reaction tank 20; and a water spraying device 28 that sprays water onto an outer surface of the hollow fiber membrane 22. The hollow fiber membrane 22 allows oxygen in the oxygen-containing gas to permeate into the reaction tank 20 and supplies the oxygen to a biofilm including the sulfur-oxidizing bacteria formed on the outer surface of the hollow fiber membrane 22.SELECTED DRAWING: Figure 1

The application provides a hollow fiber membrane filament and a preparation method thereof, an oxygenation membrane and an oxygenation device. The hollow fiber membrane filament comprises a first support layer, a second support layer and a skin layer arranged from inside to outside in a radial direction. The first support layer and the second support layer are both porous structures, and the pore size of the pores in the first support layer is greater than the pore size of the pores in the second support layer. The hollow fiber membrane filament has good oxygen permeation coefficient and plasma leakage resistance. When the hollow fiber membrane filament is used to prepare an oxygenation membrane, the oxygenation membrane has good gas exchange performance and a long plasma leakage resistance time, and meets the use requirement.

This invention relates to a multilayer antioxidant carbon aerogel composite material, its preparation method, and its application, belonging to the technical field of heat insulation materials. It aims to solve at least one of the following problems in existing carbon aerogel composite materials: poor antioxidant performance, poor ablation resistance, and easy cracking and peeling of the coating under thermal shock conditions due to the mismatch in thermal expansion coefficients between the ceramic coating and the carbon aerogel composite matrix. The composite material of this invention uses thermosetting phenolic resin as a binder for the ablation-resistant putty, significantly enhancing the interfacial bonding strength between the ceramic particles and the carbon aerogel composite matrix, effectively inhibiting cracking and peeling of the coating under thermal coupling. Simultaneously, utilizing the synergistic effect of the various raw materials at high temperatures, a dense composite barrier of ceramic and glass phases is generated in situ within the coating, possessing high-temperature melting and sealing functions, blocking oxygen penetration, and significantly improving the protective capability of the composite material under extreme oxidative ablation environments.

When oxygen enters the case of a solid electrolytic capacitor, the solid electrolyte containing conductive polymers deteriorates, leading to a problem of increased ESR (Electrolytic Stress Rating). [Solution] The capacitor element comprises an anode, a cathode, and a solid electrolyte; a case for housing the capacitor element; and a sealing member for sealing the case, wherein the oxygen permeability coefficient of the sealing member is 3.550 × 10⁻⁶. ―10 [cc·cm / (cm 2 A solid electrolytic capacitor characterized by having a value of less than or equal to (·s·cmHg).

The utility model relates to the technical field of cables, in particular to a high-flame-retardant fireproof power cable, which comprises a conductor core, a mica tape fireproof layer, a ceramic composite insulating layer, a flame-retardant filling layer, a metal composite shielding layer, a flame-retardant wrapping layer and a flame-retardant sheath layer which are sequentially arranged from inside to outside, and the two layers of mica tapes are bonded through a high-temperature-resistant adhesive. The high-flame-retardancy fireproof power cable has the advantages that the mica tape fireproof layer of the high-flame-retardancy fireproof power cable adopts a double-layer staggered and overlapped wrapping structure, and a high-temperature-resistant adhesive is combined, so that a compact insulation barrier is formed at high temperature, and the erosion of flame to the conductor cores is effectively delayed; meanwhile, the ceramic composite insulating layer is made of a ceramic high polymer material, can be quickly sintered into a hard ceramic body in case of fire, and has a synergistic effect with the mica tape fire-resistant layer to doubly block high temperature and oxygen permeation, so that the cable can still maintain long-time power-on capability under the fire condition, and the fire resistance is far better than that of a common fire-resistant cable.

The application provides an edible active coating for preventing dry consumption under an ultralow temperature condition and a preparation method, and belongs to the technical field of active packaging. The application combines double-layer coatings, inhibits free radical oxidation generated by freezing through an inner antioxidant, and effectively locks water and blocks external oxygen permeation through the synergistic effect of an outer high-barrier structure, thereby significantly improving the freezing preservation effect of food, and the raw materials are natural and safe, the preparation method is reasonable, and the application has good practical application value. The application solves the problems of poor effects of edible freezing protection coatings suitable for extremely cold environments in the prior art.

The application belongs to the field of flow chemistry, and particularly relates to a continuous preparation method of 2-phenylbenzothiazole compounds, a micro-reactor and a micro-reaction system. The continuous preparation method of 2-phenylbenzothiazole compounds comprises the following steps: reacting a reaction solution in a micro-reactor under visible light irradiation and oxygen charging; the reaction solution comprises a thiobenzamide compound, a catalyst, a base and an organic solvent; the micro-reactor comprises a transparent pressurized container and a capillary micro-channel reactor arranged in the transparent pressurized container; the reaction solution is arranged in the capillary micro-channel reactor; and the transparent pressurized container is subjected to oxygen charging. In the application, oxygen permeates into the reaction tube to participate in the reaction, the permeation mode of oxygen is beneficial to accurately controlling the amount of oxygen participating in the reaction, reducing the generation of oxidation by-products, and is beneficial to realizing rapid mass transfer and heat transfer, and greatly improving the synthesis efficiency.

The invention discloses a hillock oxygen suppression covering method based on a reverse air permeability structure, and belongs to the technical field of coal gangue disaster prevention and ecological remediation. The method comprises the steps that discharged gangue is subjected to three-stage screening, and coarse-particle gangue, medium-particle gangue and fine-particle gangue are obtained; according to coarse-particle gangue, medium-particle gangue and fine-particle gangue obtained through screening, layered stacking and compacting are sequentially conducted from bottom to top, and a reverse air permeability structure with the upper average particle size smaller than the lower average particle size is formed; and after paving and compacting of each gangue layer are completed, an oxygen inhibition covering layer matched with the gangue layer in function is synchronously constructed on the surface, and a gradient oxygen inhibition covering system with the gangue layers and the covering layers alternately nested is formed. Through the multi-dimensional synergistic effect of physical barrier, chemical inhibition, structural regulation and dynamic management, the oxygen diffusion path is effectively blocked, the technical problem of spontaneous combustion caused by oxygen permeation of the gangue dump is solved, and ecological restoration and long-term stability are both considered.

To provide a disk device capable of suppressing oxygen consumption inside the device and improving reliability.SOLUTION: According to one embodiment, a disk device comprises a housing in which a low-density gas containing oxygen and having a density lower than that of air is sealed, a disk-shaped recording medium rotatably provided in the housing, a spindle motor provided in the housing and supporting and rotating the recording medium, and a magnetic head including a thermal assist element for heating the recording medium. The surface of the magnet of the spindle motor is covered with a shielding film for shielding oxygen permeation.SELECTED DRAWING: Figure 3

This paper describes an oxygen preparation for the treatment of acne and wounds, as well as its preparation method and application device. The oxygen-containing preparation comprises an oxygen bag containing an oxygen-containing pouch. The pouch wall is permeable to oxygen and has an airtight section for controlling the oxygen transfer and diffusion rate, or alternatively, the pouch wall is permeable to oxygen and has an airtight section for controlling the oxygen transfer and diffusion rate. The airtight section has a thickness of 5-500 μm, and the oxygen permeability of the airtight section is 0.0000001 cm2·s·0.1 MPa-0.1 ml / cm2·s·0.1 MPa. This oxygen-containing preparation not only provides oxygen molecules to acne and wound surfaces, killing anaerobic bacteria and promoting wound healing, but also provides oxygen partial pressure and oxygen tension, ensuring oxygen content throughout use. Furthermore, the gas exchange mechanism allows for the exchange of carbon dioxide with cells, enhancing the therapeutic effect.

The application discloses a degradable high-barrier polylactic acid composite film and a preparation method thereof, and belongs to the technical field of polylactic acid composite films.The high-barrier polylactic acid composite film comprises a polylactic acid upper surface layer, a high-barrier middle layer and a polylactic acid lower surface layer; the polylactic acid upper surface layer and the polylactic acid lower surface layer are composed of a resin mixture A comprising polylactic acid resin, lactic acid-glycolic acid copolymer, degradable elastomer, compatibility agent, antioxidant and anti-hydrolysis agent; the high-barrier middle layer is composed of a resin mixture B comprising polyglycolic acid, lactic acid-glycolic acid copolymer, compatibility agent and antioxidant; the preparation method is simple, easy to realize industrial production and use, and the prepared polylactic acid composite film is a fully degradable film, which not only has excellent degradability, mechanical properties and processing properties, but also has good flexibility and barrier properties, and can effectively prevent water vapor and oxygen in the air from penetrating.