63results about How to "Good gas permeability" patented technology

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.

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.

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.

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.

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).

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.

The invention relates to a three-dimensional cell cultivator based on temperature-responsive liquid marbles and construction and application methods of the three-dimensional cell cultivator. For the three-dimensional cell cultivator incorporating the liquid marbles, different types of particles modified by temperature-sensitive copolymers are used as the temperature-response particles, on which different cell culture fluid is dropwise added to form liquid marbles having response behaviors to different temperatures, so that the liquid marbles can serve as the three-dimensional cell cultivator. The three-dimensional cell cultivator can have broad application prospect in the field of biomedical cell culture. The three-dimensional cell cultivator disclosed by the invention has the advantages that a preparation method is quick and mass production is easy to realize; a spherical cultivator of the liquid marbles provides a good three-dimensional template for adhering and proliferating of cells; a temperature controlling method is adopted to realize the cultivation of a complicated cell layer structure and a non-destructive desorption process; the liquid marbles have excellent stability and gas permeability, and can effectively ensure the survival of the cells.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.