628 results about "Membrane technology" patented technology

The invention relates to the technical field of capacitor films. The invention discloses a preparation process of a multilayer polypropylene capacitance film, which comprises the following steps: S1, raw material preparation: preparing basic resin, a nano ceramic filler, a nucleating agent and an antioxidant into multilayer raw materials respectively; s2, fusing multiple layers of raw materials by an independent screw extruder, and compounding by a co-extrusion die head to form a film blank; and S3, carrying out air ring gradient cooling on the film blank. And S4, longitudinally and transversely stretching the film blank. And S5, performing heat setting in a segmented heating furnace, and performing corona treatment to improve surface energy. And S6, segmentally curing the moisture-proof coating by using an infrared oven. The multilayer heterostructure is adopted, the comprehensive performance of the capacitor film is improved through material matching, the dielectric constant, the breakdown strength and the moisture resistance are enhanced, and the problem of considering the dielectric property and the mechanical property is solved. The innovative process guarantees stable performance, is compatible with an existing production line, can realize large-scale production, meets the requirements of fields such as new energy and the like, and provides a feasible scheme for localization of high-performance capacitor films.

The application provides application of a temperature-sensitive composite material in preparation of a separation membrane, a nanofiltration membrane and a preparation method, and particularly relates to the technical field of separation membranes. The temperature-sensitive composite material comprises a temperature-sensitive material and conductive fillers. The mass ratio of the temperature-sensitive material and the conductive fillers is 10-30:1-10. The application utilizes the characteristic that the temperature-sensitive material quickly responds to temperature changes, and the temperature-sensitive material transmits to the outside world through the conductive fillers, so that timely feedback and adjustment of the temperature in the preparation process of the separation membrane are realized, the isotropic separation membrane is prepared, the stability of the performance of the separation membrane is ensured, and the quality of the separation membrane product is improved.

The invention discloses a gas separation membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The gas separation membrane comprises a separation layer comprising a network and PTI nanosheets dispersed in the network, the network comprising at least one of a biopolymer network and a chemical polymer network; selectively, the device further comprises a supporting layer which is arranged below the separation layer and is combined with the separation layer. The preparation method of the gas separation membrane comprises the following step A or step B: step A: enabling raw materials of PTI nanosheets and networks to form a membrane on the surface of polymer hydrogel to obtain the gas separation membrane; and step B, enabling the PTI nanosheet and the network raw material to form a membrane on the surface of the material of the support layer to obtain the gas separation membrane. The gas separation membrane provided by the invention is an N2 preferential permeation membrane, and has relatively high N2 permeation rate and relatively high N2 / CO2 selectivity.

The invention discloses a preparation method of an artificial cell coated with a macrophage membrane, and belongs to the technical field of artificial cell preparation. The preparation method comprises the following steps: dissolving poly (diallyldimethylammonium chloride) and sulfobutyl-beta-cyclodextrin in ultrapure water, and mixing an aqueous solution of the poly (diallyldimethylammonium chloride) and an aqueous solution of the sulfobutyl-beta-cyclodextrin to obtain a PDDA / SBE-beta-CD condensation liquid droplet solution; and mixing the macrophage membrane suspension and the PDDA / SBE-beta-CD condensed fluid drops in an equal mass ratio, and realizing in-situ coating of the macrophage membrane by adopting an ultrasonic coating technology to obtain the artificial cell coated with the macrophage membrane. The PDDA / SBE-beta-CD condensation liquid droplet constructed by the invention has good stability under the conditions of physiological salt concentration and pH and at 37 DEG C; the artificial cell coated with the macrophage membrane is prepared by mixing with the macrophage membrane suspension, and the macrophage membrane serving as a shell not only can prevent aggregate aggregation, but also can improve the structural stability and biocompatibility.

The invention relates to the technical field of special polymer functional membranes, and discloses a polybenzimidazole gas separation membrane as well as a preparation method and application thereof, the polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure, and the polybenzimidazole gas separation membrane has a nanoscale pore structure. The pore size distribution of the nanoscale pore structure is 0.1-30 nm, and the average pore size of the nanoscale pore structure is 1-80 nm. The polybenzimidazole gas separation membrane has an interpenetrating network-shaped pore structure and a nanoscale pore structure, so that the polybenzimidazole gas separation membrane has relatively high gas selectivity and permeability coefficient and also has relatively good mechanical properties.

The invention discloses a seawater carbon source and carbon sink cyclic conversion system and method, and the system comprises a seawater carbon sequestration unit which is used for receiving seawater and mixing the seawater with carbon dioxide and alkali to generate carbonate precipitate so as to obtain pre-softened seawater; the deep hardness removal unit is used for receiving the pre-softened seawater and treating the pre-softened seawater to obtain hardness-removed seawater; the deep concentration unit is used for receiving the hardness-removed seawater and concentrating the hardness-removed seawater to obtain concentrated seawater; the bipolar membrane unit comprises a salt chamber, an acid chamber and an alkali chamber and is used for receiving the concentrated seawater and preparing acid and alkali; and the seawater carbon capture unit comprises a first degassing film, a first adjusting tank, a second degassing film and a second adjusting tank which are connected in sequence. The bipolar membrane technology is adopted for treating softened seawater to prepare acid and alkali in situ, acid is provided for the seawater carbon sequestration unit, alkali is provided for the seawater carbon capture unit, the two processes of seawater carbon sequestration and seawater carbon capture are coupled, and acid and alkali consumption balance and seawater carbon source and carbon sink circulation conversion are achieved.

The invention discloses a circulating water blow-off water reuse treatment system, and relates to the field of circulating cooling water treatment, the system comprises: an induced crystallization unit, which is used for carrying out primary treatment on circulating water blow-off water through an induced crystallization fluidized bed reactor to remove hardness ions in water; the ceramic membrane filtering unit is used for carrying out secondary treatment on the primarily treated water by utilizing a ceramic membrane device and removing residual hardness ions, organic matters and suspended matters in the water; and the nanofiltration membrane unit is used for performing tertiary treatment on the water by utilizing a nanofiltration membrane according to the secondary treatment result to remove salt and organic matters in the water. According to the method, induced crystallization, ceramic membrane and nanofiltration membrane technologies are combined to cooperatively treat the circulating water and the blow-down water, so that the operation mode of simplifying the process, reducing the energy consumption and prolonging the backwashing period is realized, the dosage of chemicals and the generation of sludge are reduced, and the water recovery rate is also improved, so that the hardness is removed, and the calcium resource recovery is realized.

The invention discloses a dry-method solid-state electrolyte membrane as well as a preparation method and application thereof, belongs to the technical field of dry-method solid-state electrolyte membranes, and overcomes the defects that in the prior art, a relatively thin dry-method solid-state electrolyte membrane is easy to crack, cannot be self-supported and is low in ionic conductivity, and the solid-state electrolyte membrane is in poor contact with a solid-solid interface of an electrode. The dry-method solid electrolyte membrane comprises the following components in percentage by mass: 90%-96% of a solid electrolyte material, 1.5%-3% of polytetrafluoroethylene and 1%-8.5% of a lithiated polymer, the lithiated polymer comprises a lithium salt and a non-polar polymer; the number-average molecular weight of the non-polar polymer is less than or equal to 105, the melting point of the non-polar polymer is less than or equal to 55 DEG C, and the ionic conductivity of the non-polar polymer is greater than or equal to 10 <-6 > S / cm. The transverse tensile strength, the longitudinal tensile strength, the ionic conductivity and the cycle performance of the dry-method solid electrolyte membrane are remarkably improved.

The invention discloses a preparation method of an ultrathin sulfide solid electrolyte dry-method membrane, relates to the technical field of solid electrolyte dry-method membranes, and solves the problems that a traditional solid electrolyte dry-method membrane needs to be subjected to transfer printing after being rolled, holes and cracks exist in an electrolyte membrane during transfer printing, and the thickness of the electrolyte membrane is difficult to reach 30 microns or below. Comprising the following steps: S1, preparing a positive thick film; s2, preparing an electrolyte thick film; s3, sequentially stacking the release film, the positive electrode thick film and the electrolyte thick film to form a laminated structure; s4, carrying out multi-stage rolling on the laminated structure by using a roller press and adopting a differential temperature multi-stage composite rolling method, and carrying out synchronous thinning and compounding on the positive electrode thick film and the electrolyte thick film to form a composite film; and S5, stripping the release film from the composite film to obtain the ultrathin sulfide solid electrolyte dry film. The problem that holes and cracks are generated in the transfer printing link after rolling of a traditional electrolyte thick film is solved.

The invention provides a hydrogel hydrophilic modified gradient pore oil-water separation membrane as well as a preparation method and application thereof, and belongs to the technical field of separation membranes. The hydrogel hydrophilic modified gradient pore oil-water separation membrane comprises a base membrane with a porous structure and a hydrogel layer coated on a porous structure framework of the base membrane, and a gradient pore structure with a small pore diameter on one side and a large pore diameter on the other side is formed. The hydrogel hydrophilic modified gradient pore oil-water separation membrane prepared by the method has a super-hydrophilic and super-oleophobic surface and has excellent anti-fouling performance and oil interception performance, the gradually expanded pore diameter can provide large oil-water separation flux, emulsified oil with surface activity can be effectively treated, and the oil-water separation membrane has the advantages of high oil-water separation efficiency, high oil-water separation efficiency and the like. And excellent pollution resistance is maintained under different environmental conditions, and long-term stable operation is realized.

The invention belongs to the technical field of functional films, and particularly relates to a preparation method of a high-thickness graphene heat conduction film. Comprising the following steps: (1) low-functionalized graphene powder is taken as a raw material, the content of an additive in the raw material is not more than 20wt%, and the solvent content is not more than 10wt%; (2) carrying out hot press molding on the raw materials in the step (1) at the temperature of 25-300 DEG C to obtain a dense graphene thick film; and (3) carrying out heat treatment on the dense graphene thick film in the step (2) in an atmosphere furnace with the temperature of 1000-3300 DEG C for a certain time to ensure interlayer ordering and crystal graphitization, so as to obtain the graphene heat-conducting film with high thickness and high heat conductivity, the thickness of the graphene heat-conducting film can reach more than 200 microns, and the heat conductivity of the graphene heat-conducting film can reach more than 1300W / mK. The preparation method is simple in operation process, low in cost, easy in scale amplification and suitable for preparation and performance improvement of the ultra-high-thickness graphene heat-conducting film, and the application range of the graphene film in the fields of heat management, electromagnetic shielding, nuclear technology, high-end instrument equipment and the like is widened.

The invention provides a preparation method and application of a high-sensitivity imprinted membrane for selectively detecting microcystic toxins (MC-LR) in water based on surface enhanced Raman scattering. The preparation method comprises the following steps: step 1, preparation of silver nanocubes; step 2, preparation of Ag NCs-coated TiO2 nanoparticles; step 3, preparation of an Ag NCs-coated TiO2 / PDMS composite membrane; according to the invention, a membrane technology, an SERS technology and MIT are combined, so that the prepared product has excellent physical and chemical properties of a PDMS membrane, high sensitivity of an SERS detection technology and high selectivity of MIT; the invention provides a new method for SERS detection and widens the application range.

The invention belongs to the technical field of battery diaphragms, and relates to a wet-process bidirectional asynchronous and synchronous coexisting diaphragm preparation method, which comprises the following operation steps: material mixing and extrusion, longitudinal stretching, synchronous small-draw-ratio stretching, primary transverse stretching, extraction, secondary transverse stretching, and diaphragm forming and rolling. According to the technology, synchronous stretching and bidirectional asynchronous stretching are combined in the wet process field, transverse stretching of a membrane is divided into two times, synchronous small-draw-ratio stretching operation is set between longitudinal stretching and one-time transverse stretching, transverse and longitudinal simultaneous stretching is completed after longitudinal stretching, the obtained lattice structure is firm, and the consistency of molecular orientation is guaranteed; the diaphragm prepared by the process has the characteristics of high strength, low thickness, high gap uniformity and consistency and the like; the process mode is flexible and changeable, the diversity of wet process adjustment can be increased, more possibilities are provided for new product development, product performance is optimized, and a larger process window is provided for development of ultra-thin and ultra-strong products.

The invention discloses a low-water-permeability and low-oxygen-permeability photoresist protective film and a preparation method thereof, and relates to the technical field of dry film photoresist protective films, the protective film comprises an inner layer, a middle layer and an outer layer, the inner layer is prepared from 100 parts of low-density polyethylene and 0.1-0.3 part of a release agent, and the middle layer is prepared from 0.1-0.3 part of a curing agent; the middle layer is prepared from 20-80 parts of low-density polyethylene, 10-40 parts of high-density polyethylene, 10-30 parts of a binder, 6-12 parts of modified silicon dioxide and 1-2 parts of an antistatic agent, and the outer layer is prepared from 10-90 parts of low-density polyethylene, 10-40 parts of metallocene low-density polyethylene and 0.1-0.5 part of an anti-sticking agent; according to the invention, excellent water and oxygen double barrier properties are realized, excellent protection can be provided for a dry film photoresist film, the dry film photoresist film has the characteristics of high mechanical strength, static resistance, clean stripping and the like, the process stability and the product yield in chip manufacturing are powerfully guaranteed, and the application value is remarkable.

This invention relates to the field of polytetrafluoroethylene (ePTFE) membrane technology. Addressing the problem that existing expanded PTFE films cannot meet the high-performance standards of superhydrophobicity and superoleophobicity, this invention specifically discloses an expanded PTFE composite membrane and its preparation method. The expanded PTFE composite membrane includes an ePTFE base membrane and an fPTFE / SiO2 particle composite layer disposed on the surface of the ePTFE base membrane. The fPTFE / SiO2 particle composite layer includes a PTFE composite and SiO2 particles. The PTFE composite comprises polyethylene oxide and PTFE in a dry weight ratio of 1:10-30, and the SiO2 particles have a particle size of 100-1000 nm. By coating the ePTFE base membrane with PTFE and SiO2 particles to construct the fPTFE / SiO2 particle composite layer, and then modifying the membrane surface with silica-fluorination, the distribution of SiO2 particles can be specifically controlled to impart superhydrophobic and superoleophobic properties to the expanded PTFE composite membrane, with both water and oil contact angles >150°.

The invention belongs to the technical field of composite current collector base films, and particularly relates to a high-performance BOPP film for a composite current collector and a preparation method thereof.The preparation method comprises the steps that firstly, PP master batches, functional auxiliaries and composite filler are mixed, melt extrusion and two-way stretching film forming are conducted, and a PP base film is prepared; then carrying out corona treatment on the PP base film, and uniformly coating the PP base film with the coating liquid in an online coating manner; and finally, curing to form a film, and drawing and rolling. Wherein the composite filler is prepared by the following steps: putting MAH-g-PP and nanoparticles into an extruder, adding a stearic acid lubricant and polyvinyl alcohol at the same time, and carrying out extrusion granulation. The preparation method has the beneficial effects that the nano particles treated by MAH-g-PP are added into PP, so that the mechanical strength of the base film is remarkably improved; the cured coating is formed on the surface of the base film, so that the interface bonding force with metal ions is remarkably improved; the synergistic effect of the two improves the heat resistance of the base film.

The invention relates to a preparation process of a metal ceramic bionic multilayer film, and belongs to the technical field of metal ceramic films, and the metal ceramic bionic multilayer film comprises a porous metal matrix, a gradient transition layer, a bionic lamination layer and a nanopore separation layer. According to the method, the failure problem of a traditional metal ceramic film under the extreme working condition is systematically solved through the multi-level innovative design, firstly, in the aspects of thermal stress elimination and interface strengthening, a five-layer gradient transition layer structure with the ceramic content changing is adopted, and the plasma spraying-laser remelting synchronous machining technology is combined; the thermal expansion coefficient of the metal matrix and the ceramic layer is continuously and gradually changed, so that the interface thermal stress is effectively reduced, the bonding strength is improved, the problems of cracking and layering under the high-temperature working condition are effectively solved, the service life is effectively prolonged, the structure is strengthened and toughened, and the bionic lamination design simulates the'brick-mud 'structure of a shell pearl layer; the nano-scale metal layer absorbs crack energy, and the ceramic layer provides rigid support, so that the fracture toughness is effectively improved.

The invention discloses a device and a method for evaluating the separation performance of an ion exchange membrane based on an electrochemical impedance spectroscopy, and belongs to the technical field of ion exchange membranes. The device comprises an electrochemical workstation and an electrolytic tank, a first output end of the electrochemical workstation is connected with an induction electrode and a reference electrode, and a second output end of the electrochemical workstation is connected with a working electrode and a counter electrode; the electrolytic tank comprises a first electrolytic tank and a second electrolytic tank which are separated by a to-be-detected ion exchange membrane; the sensing electrode and the working electrode extend into the first electrolytic tank, and the reference electrode and the counter electrode extend into the second electrolytic tank. According to the invention, quantitative characterization of migration and diffusion resistance of different ions passing through the membrane is realized, and the separation performance of the ion exchange membrane on ions of different valence states is preliminarily evaluated according to the microscopic mass transfer process of the ions passing through the membrane.

The invention belongs to the technical field of breathable films, and discloses an intelligent response type breathable film air pressure self-adaption structure which comprises an air conveying pipe, a sealing cover is arranged at the top of the air conveying pipe, a breathable film is arranged in the sealing cover, an installation mechanism is arranged at the top of the air conveying pipe, and the installation mechanism comprises an installation assembly and a protection assembly. By arranging the three-layer composite breathable film structure, the functions of protection, response and sealing are integrated, and intelligent and self-adaptive response to air pressure changes is achieved by combining macroscopic deformation of the protection layer with microcosmic adjustment of the response layer. According to the mounting assembly, the sealing cover is quickly clamped and unlocked through cooperation of an exquisite inclined plane mechanism (a telescopic inclined plane block, an inclined plane sliding sleeve and a lower inclined plane block) and a spring, and the disassembly and assembly process is greatly simplified. According to the protection assembly, flexible opening and closing and stable supporting of a protection frame are achieved through a sliding frame, the protection frame and a connecting rod mechanism, and physical protection in a normal state and convenience during overhauling are both considered.

The utility model discloses a multilayer compounding device for a flexible polyimide film insulating layer, which belongs to the technical field of polyimide films and comprises a vertical support frame, and a plurality of detachable rectangular mounting frames are uniformly distributed at the top and the bottom of one side of the vertical support frame. A plurality of rectangular mounting frames are arranged on the base, a composite film winding drum is arranged on one side of each rectangular mounting frame, a tension degree adjusting mechanism is arranged on the outer side of each composite film winding drum, the multiple detachable rectangular mounting frames are arranged, the composite film winding drums of different types can be flexibly mounted according to the specifications and characteristics of different film materials, and the adaptability of equipment is improved; according to the device, multiple types of film materials can be treated, different production requirements are met, the distance between the pressurizing rollers can be adjusted automatically according to the number of layers of composite films and the thickness of the materials, and the uniform pressurizing effect is ensured.

This invention relates to the field of waterproof membrane technology, specifically to a TPO thermoplastic polyolefin polymer composite material. This material is composed of multiple components, including an interface-controlled masterbatch. Its core lies in the process of sequentially hydroxylating, treating with vinyltrimethoxysilane, hydrolyzing and condensing tetraethyl orthosilicate, and treating with octadecyltrimethoxysilane to obtain a surface-functionalized filler, which is then combined with maleic anhydride-grafted polypropylene to form the interface-controlled masterbatch. This design significantly improves the interfacial bonding between the filler and the polymer matrix, enabling the material to maintain excellent mechanical properties, dimensional stability, and low-temperature flexibility even after artificial climate aging, and effectively ensuring the long-term durability and reliability of welded joint areas.

This invention provides a continuous electroplating production line, belonging to the field of coating technology, comprising: an electroplating system, a washing system, and a drying system. The inlet and outlet of the washing system and the drying system are respectively equipped with upper and lower cooperating drive roller groups, each connected to a controllable drive motor. A base film sequentially passes through the electroplating system, the washing system, and the drying system. The tension of the base film in both the washing system and the drying system is adjusted by the controllable drive motors. In this continuous electroplating production line, drive roller groups are provided at the inlet and outlet of the washing system and the drying system. By controlling these drive roller groups separately, the tension of the base film in the washing system and the drying system can be adaptively adjusted according to process requirements, thereby achieving better results during washing and drying.

The invention relates to the technical field of inorganic functional ceramic membranes, in particular to a catalytic ceramic membrane and a preparation method and application thereof. According to the preparation method, alpha-Fe2O3 is taken as a catalyst, under the synergistic effect of other raw materials, ball milling is carried out, and the catalytic ceramic membrane is prepared by means of an ultrasonic wave-atomization method. Wherein alpha-Fe2O3 is uniformly distributed in a ceramic membrane matrix in an atomic-scale dispersion state, the exposure proportion and the utilization rate of metal atoms are greatly improved by the high-dispersion form, and the degradation capability of the membrane on pollutants is remarkably enhanced under the cooperation of ozone, so that the anti-pollution performance of the membrane is greatly improved; and meanwhile, the problem of membrane pore blockage caused by agglomeration of traditional nanoparticles is avoided, and the high-purity water flux of the membrane is effectively guaranteed on the basis of accurately maintaining the pore diameter of the membrane. In addition, the preparation process is simple and convenient to operate, large-scale production is easy to realize, and the prepared catalytic ceramic membrane has remarkable advantages in the field of sewage treatment.

The application discloses a black antireflection film and a subway shielding door plate structure, and belongs to the technical field of antireflection films. The antireflection film comprises a transparent conductive layer, a black electrochromic layer, an ion storage layer, an electrolyte layer, a protective layer and a transparent cooling layer which are sequentially arranged. The transparent cooling layer is fixedly installed on the surface of the protective layer. The transparent cooling layer comprises a plurality of cooling pipelines which are arranged in a horizontal and vertical mode. The cooling pipelines are filled with cooling liquid. The transparent cooling pipeline is arranged on the surface of the antireflection film. When the antireflection film generates heat, the antireflection film can be cooled in time, so that the heat dissipation effect of the subway shielding door plate structure during use is improved, and the service life of the device is prolonged. In the subway shielding door plate structure, the displacement control device can control the black antireflection film to slide and form a heat dissipation space between the black antireflection film and the back plate body, so that the problem of poor heat dissipation effect caused by the fact that the antireflection film is tightly attached to the subway shielding door plate structure is avoided.

The application discloses a kind of multilayer dialysis device and use method for separating landfill leachate, belong to landfill leachate processing technical field, multilayer dialysis device includes magnetic stirring module and multilayer dialysis module;Magnetic stirring module includes magnetic stirring rotor and the magnetic field control device of driving magnetic stirring rotor rotation;Multilayer dialysis module includes the experimental cylinder being set on stirring table, and multiple different diameters and coaxially arranged dialysis cylinders are arranged in experimental cylinder, and magnetic stirring rotor is arranged at the bottom of the smallest diameter dialysis cylinder;By setting multiple dialysis cylinders with different molecular weight cut-off in multilayer dialysis module, and setting magnetic stirring rotor at the bottom of the smallest diameter dialysis cylinder, not only can simultaneously process the dialysis work of multiple molecular weight organic matter and ionic landfill leachate, but also significantly improve the separation efficiency of multiple molecular weight organic matter and ions with magnetic stirring rotor, compared with single membrane technology, more separation tasks can be completed in shorter time.

The invention relates to polyethersulfones which can be used as engineering thermoplastics and also as polymers suitable for use in membrane technologies. A method for producing a polyethersulfone includes carrying out a nucleophilic polycondensation between 4,4'dioxydiphenyl sulfone and 4,4'dichlorodiphenyl sulfone in the presence of potassium carbonate in an aprotic solvent environment in two steps of: a) obtaining a dipotassium salt of 4,4'dioxydiphenyl sulfone and b) adding 4,4'dichlorodiphenyl sulfone to the salt obtained in the first step, then holding the resulting mixture while controlling the viscosity thereof to provide a mixture containing a polyethersulfone in a dissolved form in which the mass fraction of the polymer is from 50.5 to 53.3%, isolating the polyethersulfone and drying same. The invention makes it possible to produce a high-molecular-weight polyethersulfone having a controlled set mass-average molecular mass of from 85340 to 104300 g / mol, rendering the polymer suitable for use in the production of finished articles.

The application discloses a preparation method of a PPSU-based ZIF-8 double-layer membrane and application of the double-layer membrane in hydrogen separation, and belongs to the technical field of gas separation membranes. The preparation method is as follows: ZIF-8 seeds are embedded in a PPSU matrix solution, then are spin-coated onto the surface of an alpha-Al2O3 carrier to obtain a PPSU-based membrane, and secondary growth of the membrane is carried out through a solvothermal reaction, so that the seeds grow epitaxially, a continuous, dense and defect-free ZIF-8 separation layer is formed on the surface and the near-surface region of the carrier substrate, and the reaction is ended to obtain the double-layer membrane. Through the seed embedding strategy, the interface bonding force between the ZIF-8 layer and the PPSU substrate is significantly enhanced, and the generation of interface defects is effectively inhibited. The double-layer membrane has high permeation flux and high separation selectivity for a H2 / CO2 system, and is particularly suitable for hydrogen separation and purification processes.

The utility model relates to the technical field of packaging bag film blowing. The packaging bag film blowing device comprises a box body, the middle of an inner cavity of the box body is rotationally connected with the outer wall of an air blower, the upper end of the inner cavity of the box body is fixedly connected with an exhaust plate, the upper end of the exhaust plate is in lap joint with the lower end of an air volume adjusting mechanism, and the lower end face of the box body is fixedly connected with the upper end of an air inlet mechanism. According to the film blowing device, the air inlet mechanism is started to drive the air blower to be started, so that air is filtered by the filter cartridge to enter the box body, and then heated raw materials are subjected to film blowing through the exhaust plate and the air volume adjusting mechanism; and meanwhile, when the air inlet mechanism is started, the filter cartridge rotates, so that the filter cartridge is cleaned by the cleaning plate, dust is prevented from blocking the filter cartridge, the filter cartridge can be cleaned without stopping operation, and the film blowing efficiency of the packaging bag is improved.

The invention relates to the technical field of sputter coating, in particular to a VOx thin film steady-state growth gas inlet device based on quick response gas control, which is used for injecting reaction gas into a reaction cavity in a VOx thin film sputtering system, a base and a heater arranged in the base are arranged in the reaction cavity, the gas inlet device comprises a reaction gas conveying channel and a gas inlet hole, the conveying channel is connected with an external gas source and conveys reaction gas to the reaction cavity, and the conveying channel is arranged below the base; the air inlet holes are formed in the base table top and communicated with the conveying channel, and the distribution of the air inlet holes in the base table top is that the density of an edge area below a wafer is larger than that of a central area. According to the invention, the inherent deposition non-uniformity of the edge and the center of the wafer is compensated through the non-uniform air inlet holes, so that the uniformity of the film is improved on the whole; the oxygen partial pressure adjusting rate is increased through a shortened gas conveying path, the target voltage fluctuation range is narrowed, and finally steady-state control is achieved.