1637 results about "Composite membrane" patented technology

The invention discloses a partitioned multifunctional metal double-cavity vacuum coating process and system, and belongs to the technical field of material surface treatment. The process comprises the steps of base material pretreatment, double-cavity preparation, vacuum inspection, first cavity bottom layer deposition, vacuum transfer, second cavity functional layer deposition and cooling, the double cavities are provided with corresponding target materials respectively, and parallel operation and vacuum seamless transfer are supported; the system comprises double coating cavities, a vacuum transmission channel, a vacuum acquisition and control module, a coating deposition module, a workpiece bearing module and a process parameter regulation and control module, and each of the double cavities is provided with a multi-target mounting rack and carries a real-time monitoring unit and an intelligent control system. Integrated preparation of the composite film layer and synchronous production of multifunctional workpieces are achieved, operation gaps are eliminated, the compactness and adhesive force of the film layer are improved, parameter deviation and the reject ratio are reduced, and batch production requirements are met.

The invention relates to the technical field of co-extrusion molding, in particular to a multi-layer co-extrusion molding method of a building composite membrane material, which comprises the following steps: melting and plasticizing a polymer mixture of each layer, and then synchronously co-extruding to obtain a composite tubular melt blank; injecting gas into the composite tubular melt blank and drawing to obtain a composite tubular bubble; judging whether the preparation of the composite tubular vesicle reaches the standard or not according to the vesicle form characterization value; cooling and curing the composite tubular film bubbles reaching the standard to obtain a composite tubular film; when it is judged that the preparation of the composite tubular membrane does not reach the standard according to the circumferential cooling uniformity characterization value, an adjustment strategy when the preparation of the composite tubular membrane does not reach the standard is determined according to the circumferential wind speed extreme value ratio of the cooling wind ring; and flattening and rolling the composite tubular membrane reaching the standard to obtain the composite membrane material for the building. The co-extrusion forming efficiency of the composite membrane material for the building is improved.

The utility model relates to a treatment system for purifying high-salinity wastewater, which is suitable for treating high-salinity wastewater, particularly desulfurization wastewater of a coal-fired power plant and coal chemical wastewater. By combining efficient flocculation, ozone catalysis and membrane distillation technologies, a self-made chitosan-based flocculant is added in a flocculation stage, and suspended solids and heavy metal ions in wastewater are removed by utilizing good adsorption performance and flocculation capacity of the self-made chitosan-based flocculant; in the ozone catalysis stage, a self-made ternary composite catalyst is added, ozone decomposition is promoted, and organic pollutants are further removed; in the membrane distillation stage, a self-made antifouling and moisture-resistant composite membrane is used for efficient desalination and concentration, and finally efficient purification and recycling of the high-salinity wastewater are achieved. The process can significantly improve the wastewater treatment effect, reduce the concentration of salt and harmful substances in the wastewater, also reduce the operation cost, and is suitable for large-scale industrial wastewater treatment.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a silicon negative electrode composite SEI membrane based on electrochemical impedance spectroscopy in-situ regulation and control. Comprising the following steps: S1, constructing a battery system, and adding an electrochemical active organic precursor and a film-forming additive into an electrolyte; s2, in-situ monitoring: carrying out in-situ electrochemical impedance spectroscopy (EIS) scanning on the battery, and capturing the growth dynamic state of an SEI film in real time; s3, carrying out feature recognition, analyzing the EIS spectrogram in real time, and obtaining a moment when the RSEI growth rate RSEI / t has an inflection point or tends to be stable as an induction trigger point; s4, dynamic induction: applying an electrochemical induction signal of constant potential and high-frequency pulse to carry out dynamic induction; and S5, completing first circle formation to obtain the composite SEI film. The composite SEI film of the inorganic base layer and the organic flexible layer is constructed through combination of EIS real-time monitoring and dynamic induction, the problem that the SEI film is prone to cracking is effectively solved, intelligent and controllable preparation of the composite SEI film is achieved, the cycle life of a silicon negative electrode battery is prolonged, and the consistency of the silicon negative electrode battery is improved.

The invention provides a preparation method of a metal-based ceramic composite membrane with a catalytic ozone function. The preparation method comprises the following steps: preparing functional powder by taking tetrabutyl titanate as a titanium source and silver nitrate or ferric nitrate as a catalytic active metal source and adopting a sol-gel method; a porous metal pipe is used as a supporting body, metal powder and functional powder which are made of the same material as the supporting body are mixed to prepare functional slurry, the functional slurry is evenly deposited on the inner wall of the supporting body through vacuum filtration, and powder particles which are not firmly combined are removed through back flushing; and finally, the binding force between the functional film layer and the metal matrix is improved through high-temperature heat treatment. Wherein the thermal expansion coefficient difference between the metal supporting body and the functional film layer can be reduced by adding the metal powder, the metal powder is melted and diffused in the high-temperature heat treatment stage, and metallurgical bonding is formed between the functional powder and the metal substrate. The method is simple in process, and the prepared metal-based ceramic composite membrane has the advantages of being high in membrane layer binding force, not prone to falling off, high in catalytic activity, high in anti-pollution capacity, stable in operation and the like.

The invention discloses a biodegradable flexible conductive high-hydrophobicity sensor substrate and a preparation method and application thereof.The preparation method comprises the steps that a polylactic acid electrostatic spinning solution and a chitosan / polyethylene oxide mixed electrostatic spinning solution are prepared on the basis of a safe and non-toxic food-grade material; the preparation method comprises the following steps: sequentially spinning by adopting an electrostatic spinning technology to form a sandwich structure flexible substrate, transferring a carbon nano tube conductive film, and tightly attaching the carbon nano tube conductive film to the surface of a polylactic acid layer of the sandwich structure substrate, thereby finally obtaining the flexible conductive high-hydrophobicity composite substrate. According to the invention, a hydrophobic-hydrophilic-hydrophobic sandwich structure is constructed through multi-layer electrostatic spinning, and a surface carbon nanotube conductive layer is cooperated, so that the substrate has high hydrophobicity, excellent conductivity and flexible tensile property. The preparation method has the characteristics of controllable process, low cost and environmental friendliness, and the obtained substrate is expected to have wide application prospects in the fields of food packaging, sensor substrates, intelligent wearing, health monitoring and the like.

The invention provides a dye / ion separation membrane with pore diameter and charge coordinated regulation and control as well as a preparation method and application thereof, and belongs to the field of preparation of a double-layer ionic covalent organic framework (COFs) composite membrane. An aromatic polyamide ultrafiltration membrane is used as a base membrane, and a double-layer COFs membrane is constructed on the surface of the aromatic polyamide ultrafiltration membrane through a multi-time interfacial polymerization method. The first layer is a positive charge COFs layer formed by reacting a guanidyl monomer with 1, 3, 5-triformyl phloroglucinol (Tp); and the second layer is a negative charge COFs layer formed by reacting ionic aromatic diamine with Tp. By adjusting the type and concentration of the monomers, the pore diameter and charge distribution of the film layer can be synergistically regulated and controlled, and the double-layer composite film which is stable in structure and orderly stacked is constructed. The obtained membrane has molecular sieve separation and electrostatic regulation functions, can efficiently intercept organic dye molecules in high-salt printing and dyeing wastewater, and has high flux, high selectivity and good chemical stability.

The invention discloses a preparation method of a flexible infrared super-surface absorber based on MDM, and belongs to the field of micro-nano machining patterning. The method comprises the following steps: pretreating a polymer material; depositing a layer of bottom metal film on the pretreated substrate by adopting magnetron sputtering; a metal reflecting layer, a dielectric insulating layer and a metal surface functional layer are sequentially deposited through magnetron sputtering, a periodic nano microstructure is constructed on the surface of a flexible composite film, a nano round pit array is etched in situ on a surface metal layer of an MDM structure by using a femtosecond laser selective etching process, and an MDM laminated structure is formed. According to the invention, stable integration of the MDM structure and the flexible substrate can be realized, and meanwhile, high absorptivity and good flexibility of the device in an infrared band are ensured. The absorber prepared by the invention can generate resonance absorption on incident infrared electromagnetic waves through a surface plasmon and F-P cavity resonance coupling mechanism, and meanwhile, the characteristic size variation is changed through physical excitation, so that effective absorption and frequency regulation of the electromagnetic waves at the infrared band of 3-14 microns are realized.

The invention provides a polyethylene composite film. The polyethylene composite film comprises a surface layer, a middle layer and a heat sealing layer which are sequentially stacked, wherein the surface layer is composed of 58%-76% of hexene copolymerized metallocene linear low density polyethylene, 18%-37% of low density polyethylene and a small amount of slipping agent and anti-blocking agent; the middle layer is composed of 79%-88% of octene copolymerized metallocene medium density polyethylene, 5%-21% of hexene copolymerized metallocene linear low density polyethylene and 6%-15% of high density polyethylene; and the heat sealing layer is composed of 47%-65% of hexene copolymerized metallocene linear low density polyethylene, 33%-45% of low density polyethylene and 2%-5% of a tackifier. According to the composite film disclosed by the invention, through gradient design of each layer of material, the whole composite film has rigidity and toughness, and the composite film is particularly suitable for manufacturing stand-up bag packages which stand stably and are compression-resistant and impact-resistant.

The invention discloses a composite membrane with adsorption separation and catalytic degradation functions as well as a preparation method and application of the composite membrane. The composite membrane is supported by a porous base membrane, a polyamide separation layer formed by reaction of a 3, 4-dihydroxyphenylethylamine and 2, 3-diaminophenol comonomer and acyl chloride is constructed on the surface of the porous base membrane through interfacial polymerization, and FeCo-g-C3N4 nanosheets are anchored in situ; the membrane can efficiently activate peroxymonosulfate (PMS) to generate free radicals under the nearly neutral condition, efficient interception and catalytic degradation of organic pollutants (such as antibiotics) are synchronously achieved, and heavy metal ions (such as Pb < 2 + > and Cd < 2 + >) are adsorbed through a functional monomer structure; the invention provides an interfacial polymerization preparation method of the membrane. The composite membrane breaks through the limitation of'only interception but not degradation 'of a traditional membrane, realizes integration of'separation-adsorption-degradation', can remarkably reduce the volume of concentrated water and reduce the toxicity of the concentrated water, and is suitable for advanced treatment of wastewater containing composite pollutants in the industries of pharmacy, printing and dyeing and the like.

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 discloses a supercapacitor with a honeycomb structure and a preparation method thereof, the supercapacitor comprises a positive current collector, a negative current collector and a honeycomb energy storage layer, and the positive current collector and the negative current collector respectively cover two opposite surfaces of the honeycomb energy storage layer; the honeycomb energy storage layer is formed by folding, stacking and fixing a plurality of composite films, each composite film comprises a first electrode layer, an electrolyte layer and a second electrode layer, and the first electrode layer, the electrolyte layer and the second electrode layer are sequentially stacked and are respectively compounded and fixed through a bonding layer. The preparation method comprises the following steps: firstly, sequentially compounding and fixing the first electrode layer, the electrolyte layer and the second electrode layer to form a composite membrane with a sandwich structure, coating an adhesive on the single side surface of each composite membrane at intervals, and then stacking and stretching a plurality of composite membranes to form a honeycomb core structure; after folding, a positive current collector and a negative current collector are compounded on the two sides of the honeycomb core structure. An energy storage structure and a force bearing structure are organically combined, and the energy storage performance and the mechanical performance are synergistically improved.

The application provides an enhanced transdermal absorption cosmetic patch containing high-efficiency active polydeoxyribonucleotide PDRN (DNA sodium) and a low-temperature preparation method thereof. The cosmetic patch comprises, from outside to inside, an outer release backing layer, a slow-release core layer, a quick-release core layer and a soluble hollow microneedle array layer. The outer release backing layer is a PET / aluminum foil / polyethylene composite film, and the mass ratio of the three is (80-90):(0.5-2):(0.1-0.5). The PDRN is efficiently delivered transdermally, has long-term effect, high activity retention and excellent biocompatibility, and significantly improves the transdermal efficiency and use safety of the cosmetic patch.

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 discloses a photo-thermal composite film based on cobalt porphyrin and graphene and a preparation method and application thereof.The photo-thermal composite film comprises a substrate layer, a photo-thermal active layer loaded on the substrate layer and a sealing layer wrapping the surface of the photo-thermal active layer, and the photo-thermal active layer is a composite material of a cobalt porphyrin covalent organic framework material and reduced graphene oxide; and the sealing layer is made of polydimethylsiloxane. The flexible PVDF microporous membrane is used as a mechanical support substrate, the COF-rGO photo-thermal active layer is loaded through a vacuum filtration method, surface sealing and hydrophobic strengthening are achieved through impregnation and curing of the PDMS solution, the whole preparation process is simple, conditions are mild, and the obtained membrane material is stable in structure and firm in combination and has good application prospects. The material has high-efficiency photo-thermal conversion performance, stable super-hydrophobic property and excellent oil-water separation capability, can effectively adsorb high-viscosity oil in a severe environment, and provides a feasible technical path for developing a high-efficiency and durable solar-driven oil-water separation material.

A method for preparing a graphene composite membrane on the surface of a tubular support. In the method, a tubular ceramic membrane is used as the support, a layer of graphene material is uniformly prepared on the surface of the support by vacuum suction, and the defect-free tubular graphene composite membrane is obtained by the drying process.

The invention discloses an MXene-based dual-channel cascade coreless optical fiber SPR sensor and application thereof, the sensor is formed by cascading a multimode optical fiber with two sections of coreless optical fibers, the NCF area of the channel 1 is only coated with a gold film, and the NCF area of the channel 2 is coated with a gold-cysteamine-MXene composite film. Theoretical analysis shows that when the NCF lengths of the channel 1 and the channel 2 are 5 mm and 12 mm respectively, the visibility of formants is optimal, and the distance between the formants can be increased by increasing the thickness of MXene. Experiments show that in the refractive index range of 1.333-1.366, the optimal number of layers of MXene is four, at the moment, the RI sensitivity of a channel 1 and the RI sensitivity of a channel 2 reach 1894.27 nm / RIU and 4001.48 nm / RIU respectively, and the FOM is 16.86 RIU <-1 > and 32.99 RIU <-1 > respectively. The device is simple in structure, low in cost and convenient to operate, and has good application potential in the field of two-parameter biochemical sensing.

The invention belongs to the technical field of gas sensors, and particularly relates to a carbon oxide nanohorn modified chitosan composite membrane and a preparation method and application of the composite membrane. The composite membrane comprises a three-dimensional network skeleton formed by chitosan and carbon oxide nanohorns uniformly dispersed on the three-dimensional network skeleton. The preparation method comprises the following steps: mixing the carbon oxide nanohorn and chitosan according to a mass ratio of 1: (8-10), carrying out vacuum defoaming, spreading and drying. The chitosan carbon nanohorn composite membrane can be used as a sensitive layer of a gas sensor or a monitoring device. According to the application, the carbon oxide nanohorn is introduced into the chitosan matrix as a reinforcing phase, so that the performance of the chitosan film sensor in the aspects of hydrogen sulfide gas detection sensitivity, error and stability can be improved.

The invention designs a sandwich structure composite system diaphragm with ion selectivity and multi-size screening to realize high-density and dendrite-free zinc deposition on the surface of a zinc negative electrode and spontaneously inhibit passivation / corrosion of the zinc negative electrode in the circulation process. According to the sandwich structure composite system, a traditional glass fiber diaphragm is used as a substrate, then bacterial cellulose is used as a middle layer, and finally a metal oxide Ti0. 87O2 nanosheet is used as a top layer, so that a macroscopic / microcosmic / molecular pore multi-size screening structure is formed, uniform deposition of zinc can be realized, growth of dendritic crystals can be inhibited, and the long cycle performance of the battery is effectively improved.

The invention provides a preparation method and application of an air-stable sulfide composite electrolyte, and the method comprises the following steps: S1, weighing an M source (M = Cd, Mn and Zn), P2S5 and S powder according to a ratio of 1: 1: 3, adding iodine for catalysis, carrying out heat preservation at 700-720 DEG C for 6-7 days, and carrying out K + insertion, Li + exchange and ultrasonic centrifugation to prepare a LiMyPS3 nanosheet dispersion liquid; s2, dissolving PEO and LiTFSI in acetonitrile to form a film, drying to obtain a pure PEO film, immersing the pure PEO film into a dopamine Tris buffer solution with the concentration of 2 mg / ml and the pH value of 8.5, oscillating for 12-24 hours in an oxygen environment, and washing and drying to obtain a PDA-coated PEO film; and S3, carrying out suction filtration on the LiMyPS3 dispersion liquid to obtain a self-supporting membrane, stacking according to the sequence of "PDA-coated PEO membrane-sulfide membrane-PDA-coated PEO membrane", carrying out isostatic pressing at 10-20 MPa, and then carrying out vertical cutting at 0 DEG C to obtain the 20-30 [mu] m composite membrane. The film has the advantages of good air stability, almost no loss of conductivity after 30 days, room temperature conductivity of 9.2-10.2 ms / cm, excellent interface bonding force and mechanical strength, and stable window of 4.3-4.5 V, is adaptive to a high-voltage positive electrode, and can be used for a high-energy-density solid-state lithium battery.

The application discloses a soil-rock dam reinforcing and enhancing structure for preventing over-standard overflow dam break and a construction method thereof. The structure comprises a soil-rock dam filling body, a vertical anti-seepage core wall arranged in the soil-rock dam filling body, and a composite high-strength fiber three-dimensional membrane arranged on the surface of the dam slope after regulation. The membrane body is unfolded along the slope surface and is reinforced by a pressing plate type fixing anchor bolt and a fiber membrane three-dimensional rivet. The row-to-row spacing of the fixing anchor bolt is 20-50 cm, so that the composite membrane is tightly attached to the dam body. The rigid structure and the flexible protection material are organically combined, the dam body's erosion resistance and durability are significantly improved while the flood discharge capacity is ensured, the construction method is simple, the cost is low, and the method is suitable for flood control reinforcement and safe operation of various soil-rock dams.

The utility model belongs to the related technical field of packaging and printing corollary equipment, and discloses a device for solving the warping problem of composite paper, which is integrally arranged on the upstream side of a film unwinding group of a compound machine and comprises a support frame, a front guide rail group and a rear guide rail group, wherein the front end and the rear end of the support frame are respectively formed by a front pneumatic shaft and a rear pneumatic shaft which are arranged in parallel along the vertical direction, and each pneumatic shaft can perform telescopic motion along the vertical direction; the front guide rail set is arranged at the front end of the supporting frame and at least comprises two front guide rollers which stretch across the two front pneumatic shafts respectively. The rear guide rail set is arranged at the front end of the supporting frame and at least comprises two rear guide rollers which stretch across the two rear pneumatic shafts respectively. According to the utility model, the stroke of the composite film before reaching the film unwinding group of the compound machine can be properly increased in a manner of compact structure and convenience in operation and control, and the tensile tension borne by the composite film is buffered, so that the warping problem is effectively solved.

The invention belongs to the technical field of polymeric membrane composite glass, and discloses a preparation method and application of polymeric membrane composite glass, the polymeric membrane composite glass comprises a first glass layer, a second glass layer and an EVA composite membrane located between the two glass layers, the EVA composite membrane contains nano metal oxide particles, and the nano metal oxide particles contain nano metal oxide particles. The nano metal oxide particles comprise cerium oxide, tungsten oxide, titanium oxide and yttrium oxide. The middle layer of the EVA composite film of the polymeric film composite glass additionally comprises nano metal oxide particles, tungsten oxide absorbs near-infrared heat radiation, titanium oxide reflects infrared light, cerium oxide and yttrium oxide can absorb ultraviolet light, and the heat insulation performance is excellent; according to the present invention, with the nano-metal oxide particles, the tungsten oxide, the tin oxide and other nano-oxide particles, the elastic modulus, the density and the viscosity of the EVA are increased, the sound wave conduction path is effectively blocked, the sound insulation and noise reduction performance is excellent, the nano-metal oxide particles can improve the interface bonding strength of the EVA composite film and the glass layer, and the safety performance is high.

The invention discloses a composite film, a composite film preparation method and a microphone. The composite membrane comprises a fiber membrane layer, the fiber membrane layer is provided with a plurality of pores, the pores are filled with silicone rubber filler, and / or at least one surface of the fiber membrane layer in the thickness direction is covered with a silicone rubber layer. The fiber membrane layer can provide high mechanical strength for the composite membrane, and the silicone rubber filler filled in the gaps and / or the silicone rubber layer covering the surface of the fiber membrane layer can improve the waterproof performance of the composite membrane, so that the overall strength and waterproof performance of the composite membrane can be improved.

The application belongs to the technical field of composite membrane materials, and particularly relates to a preparation method and application of a super-hydrophilic composite membrane capable of removing various pollutants in water bodies; the preparation method comprises the following steps: preparing a bimetallic organic framework material FeZr-MOF through a one-step solvothermal method; dispersing FeZr-MOF powder in a suitable solvent, mixing, adding polyvinylidene fluoride and polyvinylpyrrolidone, stirring under water bath conditions at 30-80 DEG C, obtaining a uniformly mixed casting solution, and then preparing a FeZr-MOF / PVDF composite membrane through a non-solvent induced phase separation method after ultrasonic defoaming treatment; then, a polyaniline coating layer is in-situ polymerized on the surface of the composite membrane to obtain a PANI / FeZr-MOF / PVDF composite membrane. The super-hydrophilic composite membrane capable of removing various pollutants in water bodies has good effects in oil-water separation, removal of antibiotics and chromium ions in water and the like.

This invention relates to the field of temporary protective materials for glass processing, specifically a high-strength, low-emissivity temporary protective film for glass and its preparation method. The protective film is a core-shell nanoparticle-reinforced waterborne polyurethane composite film with a gradient crosslinking structure, composed of the following components: 100 parts by weight of waterborne polyurethane matrix resin, 10-20 parts by weight of a low-temperature unblocking crosslinking agent, 5-20 parts by weight of core-shell nanoparticles, and 0.5-2 parts by weight of additives. The protective film has a gradient crosslinking structure along its thickness direction, with a higher crosslinking density on the surface near the air side than on the bottom surface near the glass side. This invention significantly improves the film's density through the synergistic reinforcement of the gradient crosslinking structure and core-shell nanoparticles, achieving a surface water contact angle of over 90°. Even after 72 hours in a high-humidity environment, it maintains its integrity and good protective performance, effectively solving the technical problem of traditional water-soluble films easily absorbing moisture and softening.

The invention discloses a fluorine-containing emulsion constant-pressure feeding device and a polyimide composite film production system.The fluorine-containing emulsion constant-pressure feeding device comprises a liquid supplementing tank and an emulsion tank, and a liquid supplementing pipe used for conveying emulsion to the emulsion tank through the pressure difference between the liquid supplementing tank and the emulsion tank is arranged between the liquid supplementing tank and the emulsion tank; the emulsion tank is provided with a compressed gas inlet pipe and a compressed gas exhaust pipe, and the constant-pressure feeding device for the fluorine-containing emulsion further comprises a controller which is used for controlling the pressure in the emulsion tank to be basically constant by controlling the compressed gas flow of the compressed gas inlet pipe and the compressed gas flow of the compressed gas exhaust pipe. And the outlet of the emulsion tank is also provided with a feeding pipe for conveying the emulsion to the emulsion coating device through the pressure difference between the emulsion tank and the emulsion coating device. The invention further discloses a polyimide composite film production system provided with the fluorine-containing emulsion constant-pressure feeding device. The method is suitable for preparing the high-performance PI / PTFE composite film.

The application belongs to the technical field of water treatment and new material, and discloses a La-MOF-COOH / PEI-PVDF composite membrane material for removing phosphorus, a preparation method and application, which comprises the following steps: (1) preparation of PVDF; (2) preparation of La-MOF-COOH; (3) preparation of La-MOF-COOH / PEI-PVDF composite membrane, to obtain the La-MOF-COOH / PEI-PVDF composite membrane material. The interface compatibility of the La-MOF-COOH / PEI-PVDF composite membrane material can significantly improve the mechanical properties, chemical stability, thermal stability, filtration performance, recyclability and reusability, uniform dispersibility and adsorption performance of the composite membrane. These advantages not only improve the comprehensive performance of the composite membrane, but also expand the application range of the composite membrane in the field of water treatment and the like, and have important practical significance.

The present invention relates to an electrode composite membrane and an electrochemical element including the same. The electrode composite membrane of the present invention includes an electrode plate including an electrode portion and a reinforcing material portion, an electrolyte membrane arranged on one side of the electrode plate, a support arranged on the other side of the electrode plate, and an adhesive portion arranged on at least a portion of the facing portions of the electrode plate and the support, and the electrode portion includes a current collector and an active material layer arranged on the current collector, the electrolyte membrane is in contact with at least a portion of the active material layer and is in close contact with the electrode portion and the reinforcing material portion without being spaced apart, and the reinforcing material portion has a thickness that is the same as or thinner than the thickness of the electrode portion, is arranged to surround the entire circumference or at least a portion of a side portion of the electrode portion, and is in surface contact with the side portion of the electrode portion without being spaced apart.

The invention relates to the technical field of composite membrane materials, and particularly discloses a carbon fiber reinforced acrylic acid composite membrane which comprises a bottom layer with the thickness of 5-10 microns, a middle layer with the thickness of 30-40 microns and a surface layer with the thickness of 10-15 microns. The raw materials of the bottom layer, the middle layer and the surface layer comprise difunctional modified acrylic resin; the bifunctional modified acrylic resin is obtained by copolymerizing acrylic resin with isobornyl methacrylate and bis (2-methacryloyloxyethyl) disulfide under the action of an initiator by taking the acrylic resin with the light transmittance greater than or equal to 90% as a main body; the weight ratio of the acrylic resin to the isobornyl methacrylate to the bis (2-methacryloyloxyethyl) disulfide is 65 to (5 to 10) to (3 to 5). The carbon fiber reinforced acrylic acid composite film provided by the invention has the characteristics of good mechanical property, good conductivity, excellent solvent resistance and the like, can be used for manufacturing a conductive substrate of a perovskite solar cell, and has a very good application prospect.