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63results about How to "Good gas permeability" patented technology
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Solid oxide fuel cell and preparation method thereof
InactiveCN101662033AReduce performanceSolution to short lifeCell electrodesSolid electrolyte fuel cellsFuel cellsCerium
The invention provides a solid oxide fuel cell. The anode layer, cathode layer and electrolyte layer of the cell contain cerium-based materials; the cerium-based materials of the anode layer and the cathode layer are cerium-based materials with a flower-shaped structure; and the anode layer and the cathode layer also carry catalysts and / or conductive additives. The invention also provides a preparation method of the cell. The solid oxide fuel cell has improved performance and service life and improves the acoustic performance of electrodes, thereby improving the overall reaction activity of the electrodes. The cell can use medium-low temperature solid oxide fuels of a plurality of fuels including hydrocarbons.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Application of polyimide in gas separation
InactiveCN107913580AStrong film formingLow costDispersed particle separationThermal stabilityDiamine
The invention provides application of polyimide with a structure presented by a formula I (shown in the description) in gas separation. By introducing 2,2',3,3'-biphenyl tetracarboxylic acid dianhydride with a twisted structure to be polymerized with diamine monomers, polyimide with good film forming capacity is obtained. Synthesized polyimide is relatively low in cost, has relatively large specific surface area and good thermal heat stability, gas selectivity and gas permeability and further has good application prospects in the field of gas separation.
Owner:CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Polyimide gas separation membrane material, and preparation and application thereof
InactiveCN108114615AGood gas permeabilityHigh selectivityProductsSemi-permeable membranesNitrogen gasOxygen
The invention provides a polyimide polymer. According to the invention, 2,2'-bis(3,4-dicarboxylphenyl)hexafluoropropane dianhydride (6FDA) used as a dianhydride monomer and 2,4-diaminobenzene sulfonate (MPDSAM) used as a diamine monomer, are subjected to solution copolycondensation so as to synthesize metal-ion-containing polyimide (6FDA-MPDSAM) which can be dissolved in N,N-dimethyl formamide (DMF), N,N-dimethyl acetamide (DMAc), N-methyl-2-pyrrolidone (NMP) and other solvents. The prepared polyimide has high gas permeability and selectivity and can be used for separation of a plurality of gases, e.g., separation of oxygen / nitrogen in the air, separation of hydrogen / nitrogen, separation of carbon dioxide and methane during purifying of natural gas, etc.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Gas diffusion electrode, membrane-electrolyte assembly, polymer electrolyte fuel cell, and methods for producing these
InactiveCN101174694AImprove conductivityExcellent dischargeFinal product manufactureCell electrodesPolymer electrolytesFuel cells
PROBLEM TO BE SOLVED: To provide a gas diffusion electrode for solid polymer fuel cell that is superior in water-repellent property for quickly supplying and removing reaction gas, and in conductivity that effectively transmits generated electricity.SOLUTION: The gas diffusion electrode for solid polymer fuel cell is formed only by fibrous carbon material or has a porous fluororesin, formed by painting a liquid prepared by dispersing carbon material constituted of a fibrous carbon material and a particle-shaped carbon material in fluororesin solution. The film-electrode assembly for the solid polymer fuel cell can be manufactured, by laminating the gas diffusion electrodes 3a, 3b on both surfaces of the solid polymer electrolyte film 1 via catalyst layers 2a, 2b.
Owner:TOMOEGAWA PAPER CO LTD
Polymer electrolyte membrane comprising coordination polymer
InactiveCN101313013AHigh proton conductivityImprove proton conductivityFuel cell auxillariesSolid electrolyte fuel cellsPolymer electrolytesFuel cells
The invention relates to a polymer electrolyte membrane, especially of a fuel cell, and to the use of a polymer electrolyte membrane. The invention further relates to a process for producing a polymer electrolyte membrane, especially a proton-conductive polymer electrolyte membrane, preferably of a fuel cell. The polymer electrolyte membrane is developed further by virtue of the polymer electrolyte membrane comprising coordination polymers (metal organic frameworks).
Owner:GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH
Copolymers of intrinsic microporosity, and preparation method and application thereof
ActiveCN106279672ALarge specific surface areaGood gas permeabilitySemi-permeable membranesMethane captureIndustrial gasOxygen
The invention discloses copolymers of intrinsic microporosity; the copolymers of intrinsic microporosity have the structure represented by the following formula described in the specification, wherein R is at least from substances represented by the following structural formulas, m and n are integers greater than or equal to 0 but are not 0 at the same time, and the ratio of n to m is (0-1) to (0-1). The copolymers are synthesized by a way of polycondensation with a Hitler alkali structure unit as a functional group. The copolymers have the characteristics of high specific surface area, high gas permeability rate, processable solvent and the like, and can be used for forming a test membrane material for a gas permeability rate test device; the membrane material has excellent gas separation performance, especially the separation performance of the oxygen / nitrogen gas pair is close to or beyond the Robeson upper limit updated in 2008, and the membrane material has wide prospect in industrial gas separation application.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Three-dimensional cell cultivator based on temperature-responsive liquid marbles and construction and application methods of three-dimensional cell cultivator
ActiveCN107522825AGuaranteed survivalImprove stabilityBioreactor/fermenter combinationsBiological substance pretreatmentsTemperature responseNon destructive
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Porous base material, porous electrode, carbon fiber paper, method for manufacturing carbon fiber paper, and method for manufacturing porous base material
InactiveCN109478654AGood gas permeabilityImprove drainage capacitySolid electrolytesCell electrodesPorous substrateCarbon fibers
A porous base material and porous electrode provided with both gas permeability suitable for a gas diffusion layer for a fuel cell vehicle and mechanical strength that can withstand continuous roll toroll processing, and a porous electrode with superior diffusion properties for electrolytes suitable for electrodes used in redox flow batteries, have been desired. Provided is a porous base materialwherein carbon fiber (A) with an average fiber diameter of 10 - 20 mum, average fiber length of 2 - 30 mm, modulus of elasticity in tension of 200 - 600 GPa and tensile strength of 3000 - 7000 MPa isbonded by a carbon binder (D).
Owner:MITSUBISHI CHEM CORP
Steam compression type refrigerating economizer system
InactiveCN1743773AIncrease evaporation areaImprove heat transfer efficiencyCompression machines with non-reversible cycleRefrigeration componentsSystem structureRefrigerant
This invention discloses a vapor compression type economic refrigeration system, which contains compressor, condenser, throttle and evaporator, which are jointed by welded copper pipe to form total closed refrigeration circulation system, which features membrane evaporation separator is series connected in pipeline between high pressure refrigerant outlet of condenser and high pressure refrigerant inlet of throttle, two ends of whose porous medium separation membrane connected respectively with high pressure refrigerant outlet of condenser and high pressure refrigerant inlet of throttle, refrigerant evaporation cavity connected to vapor suction open of compressor to form said closed refrigerant circulation system. Said invention raises evaporation efficiency.
Owner:孙文哲
Array-type cell dynamic culturing and regionalization processing micro-fluidic chip, and preparation method and application of same
ActiveCN107881106ASuitable for long-term cultivationGood biocompatibilityMicrobiological testing/measurementTissue/virus culture apparatusControl layerMicro column
The invention discloses an array-type cell dynamic culturing and regionalization processing micro-fluidic chip which includes, in a manner of being successively encapsulated from top to bottom, a flowing layer, a control layer, a thin film layer and a glass layer. The flowing layer is composed of an array-type cell culture zone, a buffer structure zone, a cell inoculation micro-pipe, a left liquidfeeding micro-pipe, a central liquid feeding micro-pipe and a right liquid feeding micro-pipe; the array-type cell culture zone is provided with a plurality of array-type U-shaped culture grooves anda plurality of U-shaped micro-columns are disposed in the buffer structure zone; the control layer is composed of a plurality of micro-pumps in a manner that an end-sealed structure is composed of one inlet and a plurality of micro-cavities in series connection. The micro-fluidic chip is used for carrying out fluid shear stress dynamic loading and regionalization processing of more than two biochemical factors / medicines, and researching interaction between processed cells and non-processed cells. The micro-fluidic chip breaks through conventional cell culture and treatment modes, and has beneficial to simulation of a fluid micro-environment and a biochemical micro-environment in cells in tissue under different physiological or pathological conditions.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Preparation method of novel degradable bio-based fresh-keeping logistics packaging material
The invention provides a preparation method of a novel degradable bio-based fresh-keeping logistics packaging material, belonging to the technical field of functional polymer materials. In order to improve the mechanical strength and air barrier property of a packaging film material, the preparation method takes biodegradable polylactic acid (PLA) as a base material, and can increase the toughness by adding poly (butyleneadipate-co-terephthalate) into the base material for blending; furthermore, a catechol-base modified metal organic skeleton compound which is prepared in advance is added into the mixture; the modified metal organic skeleton compound enables adjustable channels to be formed among chain molecules in a membrane, so that the aim of changing the air barrier property is achieved; the modified metal organic skeleton compound also has an enhancement effect for a polymer. The polymer film prepared by the method has good biodegradability, better air barrier property and certain strength, thus being used for the field of logistics packaging of fresh agricultural and subsidiary products.
Owner:JIANGNAN UNIV
Polyimide for gas separation prepared based on diaminotriptycene and derivatives thereof and preparation method thereof
PendingCN112574412AImprove gas separation performanceGood gas permeabilityProductsReagentsPolymer scienceCarboxylic acid
The invention discloses polyimide prepared based on diaminotriptycene and derivatives thereof and used for gas separation and a preparation method thereof. The polyimide is a copolymer formed by polymerizing one or two diaminotriptycene and one or two tetracarboxylic dianhydrides, or is a copolymer formed by polymerizing one or two diaminotriptycene derivatives and one or two tetracarboxylic dianhydrides, wherein the value range of the polymerization degree of the copolymer is 1-10000. The polyimide has excellent gas separation performance, and can be used as a gas separation film to effectively separate CH4 from a gas mixture of CH4 and CO2 in biogas separation application after being prepared into a film; therefore, a membrane material prepared from the polymer has huge application valuein the field of gas separation. For example, N2 and O2 can be separated from the air. The CO2 is removed in the purification process of natural gas and high-purity CH4 is obtained, so that the polyimide can be used for H2 recovery in the field of ammonia synthesis.
Owner:TIANJIN POLYTECHNIC UNIV
Process for extracting DNA from biological samples
InactiveCN1634965ASimple processLow costSugar derivativesMicrobiological testing/measurementDna adsorptionDNA extraction
This invention relates to a biological sample DNA extraction method, which comprises the following steps: a, leading the micro magnetic leads with carboxyl mark into the micro channel of the chip and absorbing and fixing it inside the channel to form the micro flow chip of the sample; b, mixing the sample and DNA absorbing liquid and then leading into the chip and mixing it with the micro magnetic leads, wherein the DNA in sample is absorbed on the leads with buffer liquid flowing in for washing and then collecting the washing liquid to get the high purified DNA.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
SPEEK spontaneous asymmetric gas component adjustment film and its preparation method and use
ActiveCN106380561AImprove solubilityImprove film forming conditionsFruit and vegetables preservationSolubilityPolymer science
The invention belongs to the technical field of film materials and discloses a SPEEK spontaneous asymmetric gas component adjustment film and its preparation method and use. The preparation method comprises stirring PEEK and concentrated sulfuric acid at a temperature of 40-60 DEG C so that the materials undergo a reaction for 5-7h to produce a crude product, washing the crude product, drying the product to obtain SPEEK, dissolving the SPEEK in an organic solvent to obtain a membrane casting solution, forming a film on a flat plate from the membrane casting solution, drying the film, dipping the film in distilled water, taking out the film and drying the film to obtain the SPEEK spontaneous asymmetric gas component adjustment film. SPEEK has good dissolvability, greatly improves film forming conditions and reduces a film forming cost and technical requirements. The SPEEK film has good gas adjustment functions and can be used for fruit and vegetable fresh-keeping.
Owner:SOUTH CHINA UNIV OF TECH +1
Preparation method for ceramic fiber filter pipe for high-temperature flue gas purification
PendingCN113134893AHigh porosityGood gas permeabilityGas treatmentDispersed particle filtrationFiberCeramic materials
The invention discloses a preparation method for a ceramic fiber filter pipe for high-temperature flue gas purification. The preparation method comprises the following steps: S1, uniformly mixing water, a dispersant, an organic binder and an inorganic binder in proportion to obtain a mixed solution; S2, adding a ceramic fiber into the mixed solution obtained in the S1 to obtain slurry; S3, injecting the slurry obtained in the S2 into a suction die for vacuum filtration, and carrying out wet demolding after pre-forming to obtain a ceramic fiber blank; and S4, drying and curing the ceramic fiber blank, degreasing the ceramic fiber blank, and then sintering the ceramic fiber blank at a high temperature to obtain the ceramic fiber filter pipe. The ceramic fiber filter pipe prepared by the invention is low in filter resistance, high-temperature-resistant, high in filter precision, long in service life and high in filter efficiency.
Owner:WESTERN BAODE TECH CO LTD
Gas diffusion layer for fuel cell as well as preparation method and application of gas diffusion layer
ActiveCN111129507AAvoid shocks caused by stabilityAvoid shockCell electrodesFuel cellsFuel cellsPhysical chemistry
The invention relates to a gas diffusion layer for a fuel cell as well as a preparation method and application of the gas diffusion layer. The gas diffusion layer is subjected to hydrophobic treatment, and then a hydrophilic region with a controllable shape is set on the gas diffusion layer. The hydrophilic region is of a hydrophilic membrane structure formed by self-assembly of hydrophilic smallmolecules in the gas diffusion layer, the thickness of the membrane structure depends on the diameter of the small molecules, and the hydrophilic capacity depends on the strength of hydrophilic groupscontained in the small molecules. The hydrophilic region passes through at least part of the thickness of the entire gas diffusion layer. The coordination structure of the hydrophilic and hydrophobicregions in the gas diffusion layer can be adjusted according to different working condition requirements, and the adjustment and control can meet the structural design of a plane and the structural design of the depth at the same time.
Owner:TONGJI UNIV
Isocyanuric ring-containing terminal hydrogenpolysiloxane
ActiveCN101885851AExcellent mechanical propertiesImprove heat resistanceSemiconductor/solid-state device detailsSolid-state devicesPolymer scienceOrganic group
The invention relates to a hydrogenpolysiloxane, shown as the formula (1), having isocyanuric ring, and has at least two terminal hydrogensiloxy: (X are mutually independent univalence organic group not containing unsaturated bonds, R are mutually independent methyl or phenyl, n is an integer from 1 to 50, m is an integer from 0 to 5, and P is an integer from 1 to 10). As the present invention is an isocyanuric ring-containing terminal hydrogenpolysiloxane having at least two hydrogensiloxys at ends, thus it is suitable for use in optical semiconductor sealants and the like agent.
Owner:SHIN ETSU CHEM IND CO LTD
Cyclone-type cycling filtration gas-water separation device for fuel cell system
The invention provides a cyclone-type cycling filtration gas-water separation device for a fuel cell system, which comprises a shell and a cyclone cycling filtration part, wherein the shell comprises an upper cover and a can body connected to the upper cover; the upper end of the upper cover is provided with an inlet; the side wall of the upper cover is provided with an outlet; the inner part of the can body has a hollow structure; the can body is communicated with the inlet and the outlet; the lower end of the can body is provided with a drain port; the cyclone cycling filtration part is mounted below the upper cover, and comprises a plurality of guide vanes, an air outlet, a plurality of overflow ports and a beam tube ; the inside of the beam tube is a hollow structure; the air outlet is connected to the upper end of the beam tube and is communicated with the inner part of the beam tube; the guide vanes are uniformly arranged at the upper end of the beam tube along the outer side of the air outlet in a spiral shape; and the overflow ports are opened at the upper end of the beam tube and are arranged along the side wall of the upper end of the beam tube. The gas-water separation efficiency is high, and the operation is safe and reliable.
Owner:武汉泰歌氢能汽车有限公司
Environment-friendly beverage packaging bag and processing technology thereof
ActiveCN111117173AImprove antioxidant capacityImprove antibacterial propertiesPolymer scienceCarbon nanotube
The invention discloses an environment-friendly beverage packaging bag which comprises the following raw materials in parts by weight: 50-60 parts of polybutylene succinate, 16-18 parts of polybutylene terephthalate adipate, 2.6-3.2 parts of modified chitosan, 2.2-2.5 parts of carbon nanotube whiskers, 1.8-2 parts of mica powder and 0.5-0.7 part of a coupling agent. The invention further disclosesa processing technology of the packaging bag. According to the invention, the copolymer of polybutylene succinate and polybutylene terephthalate adipate is used as the polymer matrix of the packagingbag, so that the polymer matrix not only meets the environment-friendly performance of easy degradation, but also has good mechanical properties and heat resistance. By adding modified chitosan and carbon nanotube whiskers and carrying out coupling agent treatment before blending with a polymer matrix, the environment-friendly packaging bag which is easy to degrade, high in mechanical property and barrier property and antibacterial is obtained, and the environment-friendly packaging bag is suitable for packaging beverages.
Owner:广东丹青印务有限公司
High-permeability one-way waterproof film of fruits and vegetables and preparation method thereof high-permeability one-way waterproof film
ActiveCN110744880AAvoid excessive accumulationImprove breathabilityFlexible coversWrappersCellulosePolymer science
The invention discloses a high-permeability one-way waterproof film of fruits and vegetables and a preparation method thereof the high-permeability one-way waterproof film. The one-way waterproof filmis composed of a hydrogel film layer and a spinning film layer. The one-way waterproof film is prepared by the following methods: preparing a carboxymethyl chitosan solution; firstly dissolving genipin into pure water in advance, further adding the genipin into the carboxymethyl chitosan solution drop by drop, performing ultrasonic treatment to uniformly disperse the genipin into the solution, allowing the solution to stand for 4-12 hours to complete cross-linking, further adding Ca(OH)2 and bacteriostatic substances, and fully dispersing the components so as to obtain a hydrogel solution; pouring the hydrogel solution into a glass plate, performing drying in a vacuum drying oven, and performing peeling so as to obtain a hydrogel film; and by taking an ethanol solution of ethyl celluloseand Tween-80 as a spinning solution, performing electrostatic spinning on the hydrogel film until the spinning film completely covers the hydrogel film, so as to obtain the one-way waterproof film. The one-way waterproof film prepared by the invention can change gas permeability according to respiration of fruits and vegetables, and has good properties of moisturizing, moisture adjustment, waterproofness, air permeability and sustained release, and is capable of effectively prolonging the shelf life of fruits and vegetables.
Owner:ZHEJIANG UNIV OF TECH
Modification method for carrying out gaseous polyfluoride grafting on surfaces of membrane type artificial lungs by utilizing low-temperature plasma technology
InactiveCN109157988ASuperhydrophobicGood gas permeabilitySemi-permeable membranesFiberBiocompatibility Testing
The invention discloses a modification method for carrying out gaseous polyfluoride grafting on surfaces of membrane type artificial lungs by utilizing a low-temperature plasma technology. According to the method, a poly-4-methyl-1-pentene (PMP) hollow fibrous membrane is taken as a base membrane material, a low-temperature plasma activation technology is utilized to introduce active sites on thesurface of the PMP membrane, and gaseous grafting is carried out on polyfluorides such as acids, alcohols, olefins, esters and ketones. According to the method, gaseous modified grafting is carried out on PMP base membranes by applying the low-temperature plasma technology, so that the surfaces of the base membranes have certain super-hydrophobicity, the energy consumption is less, the efficiencyis high, the biocompatibility of the modified PMP membranes is remarkably improved and the gas transmission performance is improved; and the method has a wide application prospect in biochemical treatment.
Owner:NANJING UNIV
Bipolar plate for fuel cell stacks, composite material and preparation process
InactiveCN109935850AIncrease energy densityImprove performanceFinal product manufactureFuel cellsFuel cellsFlexural strength
The invention discloses a bipolar plate for fuel cell stacks, a composite material and a preparation process. The bipolar plate includes a cathode flow field plate and an anode flow field plate, and acoolant channel is reserved between the cathode flow field plate and the anode flow field plate. The gas flow path of the bipolar plate is S-shaped. A flow field flow channel through which reaction gas reaches the center part of a flow field via a gas inlet changes from narrow to wide, and a flow field flow channel from the center part of the flow field to a gas outlet changes from wide to narrow. The composite material contains 75-84 wt% of conductive aggregate, 16-25 wt% of binder and curing agent, 2-5 wt% of filler and 2-4 wt% of cross-linking agent. The bipolar plate for fuel cell stacksdisclosed by the invention can improve the performance of stacks, reduces the size of the existing water-cooled reactor and increases the energy density of stacks. The conductivity, bending strength,gas permeability and other performance of the fuel cell bipolar plate made of the composite material of the invention are greatly improved. Moreover, the preparation process is simple, the productionefficiency is high and the cost is low.
Owner:JIEXING ENVIRONMENTAL PROTECTION TECH INVESTMENT SHANGHAI
Modification method for processing membrane artificial lung surface by low-temperature plasma and grafting polyfluoride
InactiveCN106110911AGood biocompatibilityBroad medical application prospectsMembranesSemi-permeable membranesFiberBiocompatibility Testing
The invention discloses a modification method for processing membrane artificial lung surface by low-temperature plasma and grafting polyfluoride. According to the method, poly-4-methyl-1-amylene hollow fiber membranes are used as base membrane materials; a low-temperature plasma activation technology is used for introducing active sites on the membrane surface; one kind of polyfluorides from 1H, 1H, 2H-perfluor-1-hexene, perfluoro hexyl ethylene or 1H, 1H, 2H-perfluoro-1-decene is subjected to soaking grafting. The low-temperature plasma technology is used for introducing clinical application polyfluorides on the surface of the base membrane material; the excellent oxygen gas and carbon dioxide carrying capability is realized. The modified membrane artificial lung surface has the characteristics of promoting the mass transfer on the gas, so that the transportation performance on the oxygen gas and the carbon dioxide is greatly improved through being compared with that before the modification. Meanwhile, the polyfluorides have low surface tension and super-hydrophobic performance, the biocompatibility of the modified membrane artificial lung is obviously improved. Therefore the modified membrane artificial lung has wide medical application prospects.
Owner:NANJING UNIV
Fruit crinkle-resistant agent, as well as preparation method and application thereof
ActiveCN110463755AGood breathability and moisture permeabilityGood moisturizing effectFruit and vegetables preservationPolysaccharide/gum food ingredientsPassion fruitCell wall
The invention discloses a fruit crinkle-resistant agent, as well as a preparation method and application thereof. The fruit crinkle-resistant agent is prepared from the following raw materials: okra purified polysaccharides, calcium salt and fibroin. Combination of okra purified polysaccharides, fibroin and calcium salt is utilized in the scheme, the fibroin has relatively good air and moisture permeating performance and excellent mechanical performance, the okra purified polysaccharides have relatively good moisture retention and film-forming property, and Ca<2+> is an important component ofplant tissues and an important component element of plant cell walls and can be connected to a pectin unit to facilitate maintenance of fruit firmness. Therefore, the fruit crinkle-resistant agent prepared by utilizing the combination of the okra purified polysaccharides, fibroin and calcium salt can achieve a relatively good crinkle-resistant effect in a normal-temperature storing process after passion fruits and other fruits are picked up.
Owner:广东省科学院生物与医学工程研究所
Directional energy-conducting smokeless moxibustion device based on separation membrane
InactiveCN110897873AGood gas permeabilityPrevent the generation of harmful gasesDevices for heating/cooling reflex pointsGas treatmentBiologyBiomedical engineering
The invention discloses a moxibustion device and particularly relates to a directional energy-conducting smokeless moxibustion device based on a separation membrane. The device comprises a base for fixing a moxibustion column, a housing detachably installed on the base, a separation membrane, and a sucker. Containing space is formed in the housing and is provided with an air inlet communicated with the outside atmosphere. The separation membrane is detachably connected to the inner surface of the containing space. The sucker is detachably mounted on the base. The directional energy-conductingsmokeless moxibustion device has advantages of being smokeless and capable of directionally diffusing moxibustion energy and the like.
Owner:广东泽蓝膜科技有限公司
Imidazole ionic liquid modified bacterial cellulose antibacterial film and preparation method thereof
The invention provides an imidazole ionic liquid modified bacterial cellulose antibacterial film and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving carbonyl diimidazole into DMSO, immersing a bacterial cellulose film into the obtained mixed solution, carrying out stirring at 40 to 45 DEG C for 24 to 36 h, and carrying out filtering and washing so as to obtain a product 1; step 2, immersing the product 1 into DMSO, adding 1-(3-aminopropyl)imidazole, carrying out stirring at 40 to 50 DEG C for 24 to 36 h, and carrying out washing and dryingso as to obtain a product 2; and step 3, immersing the product 2 into halogenated alkane, carrying out a reflux condensation reaction at 80 to 85 DEG C for 24 to 36 hours, and carrying out washing and drying so as to obtain the imidazole ionic liquid modified bacterial cellulose antibacterial film. The imidazole ionic liquid modified bacterial cellulose antibacterial film provided by the invention has sustainable antibacterial properties.
Owner:SHAANXI UNIV OF SCI & TECH
Proton exchange membrane, preparation method thereof and fuel cell
The invention discloses a preparation method of a proton exchange membrane, and the method comprises the following steps: adding an initiator into a mixed solution of binary olefin amine, vinyl sulfonate and a water solvent at the reaction temperature of 65-80 DEG C under the nitrogen condition to initiate free radical polymerization reaction of the binary olefin amine and the vinyl sulfonate to obtain a linear prepolymer solution; then mixing the linear prepolymer solution with a perfluorinated sulfonic acid resin dispersion liquid and mixed polyol according to a preset proportion for reaction to obtain polymer slurry; and finally, coating the polymer slurry to form a membrane, and drying and curing the membrane formed by coating to obtain the proton exchange membrane with a cross-linked interpenetrating network structure. According to the preparation method, a high-stability cross-linked polymer network is taken as a framework, an interpenetrating network is realized with perfluorosulfonic acid polymer molecules, the swelling degree of the proton exchange membrane is inhibited macroscopically and microcosmically, and the invention also discloses the proton exchange membrane prepared by the preparation method and a fuel cell comprising the proton exchange membrane.
Owner:SHENZHEN GENERAL HYDROGEN ENERGY TECH CORP LTD
A kind of method utilizing glacial acetic acid dissolution to prepare food-grade polylactic acid film
The invention discloses a method for preparing a food-grade polylactic acid film by dissolving with glacial acetic acid. The method uses food-grade glacial acetic acid to dissolve polylactic acid particles, and then pours the solution on a glass plate or a stainless steel plate to form a film. The film-making process of this method is simple, and the prepared polylactic acid film is food-grade, which not only has good toughness and degradability, but also has good gas permeability, and can be used as a fresh-keeping packaging material to prolong the life of chilled meat. , fruits and vegetables and other foods, its toughness is better than the existing plastic wrap.
Owner:CHENGDU UNIV
Protective cap for pre-filled syringe and manufacturing method of protective cap
ActiveCN111690184AImprove cleanlinessImprove heat resistanceInfusion needlesPolymer scienceEthylene-propylene-diene-monomer
The invention discloses a protective cap for a pre-filled syringe and a manufacturing method of the protective cap. The protective cap is prepared from the following raw materials in parts by mass: 100 parts of a rubber composition, 0.5-4 parts of a vulcanizing agent, 0.5-5 parts of an auxiliary vulcanizing agent, 20-90 parts of filler and 0.1-5 parts of pigment. The rubber composition is preparedfrom 30-70 parts by mass of rubber A and 30-70 parts by mass of rubber B, wherein the rubber A is one of polyisoprene rubber, butadiene styrene rubber or butadiene rubber; and the rubber B is one ofchlorinated butyl rubber, brominated butyl rubber, silicone rubber or ethylene propylene terpolymer. The protective cap provided by the invention has excellent dimensional stability, heat resistance,oxygen resistance, radiation resistance, extremely low dissolution and extractable substances and appropriate gas permeability, and is suitable for various sterilization forms such as irradiation, steam, ethylene oxide and the like.
Owner:郑州翱翔医药科技股份有限公司 +1
Novel high-strength dustproof lime desiccant packaging film and production method thereof
ActiveCN108068427AGuaranteed to be lint freeGuaranteed to be environmentally friendlyFlexible coversWrappersWater basedPolyethylene terephthalate
A novel high-strength dustproof lime desiccant packaging film and a production method thereof belong to the technical field of packaging films. The novel high-strength dustproof lime desiccant packaging film is composed of PET (polyethylene terephthalate) spun-bonded non-woven fabric, a milk white PE (polyethylene) breathable film and a perforated breathable PE film, which are compounded through AD adhesives. According to the novel high-strength dustproof lime desiccant packaging film, flexible plate water-based ink is applied to printing texts and patterns onto the PET spun-bonded non-woven fabric to ensure no surface fluff and environmental friendliness of printing; the components of the milk white PE breathable film and the perforated breathable PE film are improved, before dry compounding is performed, corona treatment under specific conditions, improvement of specific-structured coating areas of anilox rollers and improvement of structures and compounding conditions of dry compounding coating areas are implemented, so that, under the premise of improving air permeability, the peeling strength, the mechanical strength and particularly the heat-sealing strength can be improved.
Owner:杭州星点包装材料有限公司
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