460 results about "Microporous membranes" patented technology

The invention discloses an anti-ultraviolet high-flame-retardant polyester fiber and a preparation method thereof. The polyester fiber is prepared from the following raw materials in parts by weight: 100 parts of polyester chips, 20-60 parts of core-shell flame-retardant anti-ultraviolet particles and 2-4.5 parts of an anti-dripping agent. According to the invention, a porous alumina-titanium dioxide compound is used as a carrier, a magnesium hydroxide flame retardant, iron-doped carbon dots with photo-thermal performance and auxiliaries (an antioxidant and an ultraviolet light absorber) are combined with the carrier to construct a structural system loaded with multiple active components: functionalized flame-retardant particles, and then a polyurethane microporous membrane is coated, so that the flame-retardant polyurethane composite material is obtained. The core-shell type flame-retardant anti-ultraviolet particles are added into polyester fibers, so that the anti-ultraviolet performance and the flame-retardant performance of the polyester fibers can be remarkably improved. The polyester fiber provided by the invention can adaptively increase the release rate of the ultraviolet absorbent and the antioxidant when the ultraviolet property is enhanced in the environment, so that more optimized protection can be provided for a polyester fiber matrix at the moment.

The invention belongs to the technical field of waterproof and moisture permeable membrane materials, and particularly relates to a bio-based microporous membrane based on a template and a preparation method and application thereof, and the preparation method comprises the following steps: dispersing one of polybenzimidazole, aminated PI and carboxylated PBO and modified CNF into a DMF / water system; performing electrostatic spinning on the high-viscosity spinning solution; carrying out low-temperature vacuum drying treatment on the modified nanofiber self-supporting framework; coating and filling the bio-based polyurethane resin into the bio-based microporous membrane template, and carrying out negative pressure adsorption until the filling is uniform; and carrying out gradient drying on the bio-based wet membrane to obtain the bio-based microporous membrane. Compared with the prior art, the problems that in the prior art, the mechanical property or stability of bio-based polyurethane is insufficient, and a nanofiber reinforcing technology is difficult to combine with the bio-based polyurethane are solved. A nanofiber self-supporting framework with a stable structure is prepared through an electrostatic spinning technology, and then the nanofiber self-supporting framework is compounded with bio-based polyurethane to form a microporous membrane layer with waterproof and moisture permeable functions.

The invention discloses a polyimide intrinsic microporous membrane, a diamine monomer adopted by the polyimide intrinsic microporous membrane and a preparation method of the polyimide intrinsic microporous membrane and the diamine monomer. The polyimide intrinsic microporous membrane is prepared from a dianhydride monomer and the diamine monomer with a dibenzo spirofluorene xanthene structure, the diamine monomer with the dibenzo spirofluorene xanthene structure is prepared by the following steps: firstly, condensing substituted or unsubstituted 2-nitro-9-fluorenone with 1-naphthol, then carrying out nitration, and finally, carrying out reduction, thereby obtaining the diamine monomer with the dibenzo spirofluorene xanthene structure. The dibenzo spirofluorene xanthene structure contained in the polyimide intrinsic microporous membrane can effectively reduce the dielectric constant of a polymer, the polyimide intrinsic microporous membrane can be applied to the technical field of electronics and microelectronics, the asymmetric diamine structure enables a main chain of a macromolecular chain to be twisted, the twisted macromolecular chain can effectively enlarge interchain pores, and therefore the polyimide intrinsic microporous membrane has the advantages that the dielectric constant of the polymer can be effectively reduced; therefore, the free volume of the polymer is increased, the polymer has higher permeability, selectivity can be balanced, and the polymer can be applied to the technical field of membrane separation.

The invention provides a multistage composite microporous membrane electrode, a preparation method thereof and a water treatment and purification method. The multistage composite microporous membrane electrode comprises an inorganic ceramic microfiltration membrane, an anode electrocatalytic active layer and a cathode electrocatalytic active layer, the anode electrocatalytic active layer and the cathode electrocatalytic active layer are respectively positioned on two sides of the surface of the inorganic ceramic microfiltration membrane; the thickness of the inorganic ceramic microfiltration membrane is 2-6 mm, the thickness of the anode electrocatalytic active layer is 100-800 nm, and the thickness of the cathode electrocatalytic active layer is 1 [mu] m-1 mm; silicite nanocrystals are loaded on the inner walls of pore channels of the inorganic ceramic microfiltration membrane. The particle size of the silica zeolite nanocrystal is 50 to 200 nm. When the multi-stage composite microporous membrane electrode provided by the invention is used for water treatment and purification, oxygen molecules can be efficiently enriched in micropores, the conversion efficiency of hydroxyl radicals is improved, and efficient removal of refractory organic matters is realized.

The invention relates to the technical field of composite fabrics, in particular to a moisture-permeable and breathable composite fabric as well as a preparation method and application thereof. The composite fabric is formed by laminating a knitted base fabric, a microporous membrane and a woven surface fabric, wherein the single side of the microporous membrane is a processing side and faces the base fabric; reactive polyurethane is dispensed in a hole neck area through an anilox roller to form a discrete glue bridge, and humidity gating and chemical anchoring are achieved in cooperation with 3-aminopropyltriethoxysilane and Janus silicon dioxide hydrophilic / hydrophobic particles. According to the structure, the interface stability and the stain resistance and washability are improved while pore passage permeability is reserved, low-resistance water vapor transmission and high-threshold liquid barrier are achieved, and the structure is suitable for outdoor sports, protective clothing and medical barrier materials.

The utility model discloses a getter film with high initial outbreak rate and lasting moisture absorption rate for a perovskite battery, a support framework layer is an expanded polytetrafluoroethylene microporous film layer, and an active layer is a getter active layer formed by infiltrating a getter into a pore structure of the expanded polytetrafluoroethylene microporous film layer. The composite layer is a getter composite layer formed on at least one side surface of the expanded polytetrafluoroethylene microporous membrane layer through a getter. Through the above mode, the periphery of the active material layer of the perovskite cell in a service environment can be kept in a vacuum state for a long time, and the perovskite cell is ensured to be in a high photoelectric conversion efficiency and a stable state for a long time; the getter film is coated with a back adhesive layer and is non-corrosive, and the getter film can be directly pasted on a glass cover plate of a perovskite cell or on silver, aluminum and copper electrodes for packaging after the release film is uncovered during use; and the initial explosion rate is high, and moisture and oxygen can be quickly absorbed in the packaging cavity within two hours, so that a vacuum state is achieved.

The invention relates to the technical field of diapers, in particular to an antibacterial diaper and a preparation process thereof. The antibacterial diaper comprises a skin-friendly layer, an impermeable layer, a core layer and a leakage-proof bottom layer from inside to outside. And the skin-friendly layer is an antibacterial non-woven fabric. The impermeable layer is a one-way permeable membrane and is densely provided with a plurality of water guide holes, and the aperture of one side, facing the skin-friendly layer, of each water guide hole is larger than that of one side, facing the core layer, of each water guide hole. The core layer comprises a flow guide medium and high-molecular water-absorbent resin which are compounded with each other. The leakage-proof bottom layer comprises a breathable microporous membrane and a non-woven fabric which are attached to each other. The skin-friendly layer of the baby diaper is made of the antibacterial non-woven fabric, and compared with the skin-friendly layer of some baby diapers made of common non-woven fabric, the antibacterial non-woven fabric has the advantages that the antibacterial effect is improved, the reproduction of bacteria can be inhibited, and the health of babies can be protected. According to the water guide holes of the impermeable layer, water easily enters the water guide holes from the large-aperture side, is attracted by the flow guide medium on the other side and is finally absorbed by the high-molecular water-absorbent resin, and the water does not easily penetrate through the small holes and returns to the large-aperture side, so that liquid is prevented from back seepage.

This invention relates to a PTFE microporous membrane / two-dimensional nanofiber mesh composite membrane, its preparation, and its application. The specific preparation method is as follows: First, the PTFE microporous membrane is impregnated in silica sol for surface hydrophilic modification. Then, functional modification is performed to graft coordinating groups capable of complexing with metal ions onto the polymer macromolecular chains. These groups, along with a surfactant, are added to a solvent and stirred to obtain a web-forming solution. The web-forming solution is then uniformly coated onto the surface of the hydrophilically modified PTFE microporous membrane to form a continuous ultrathin polymer liquid membrane. Finally, a non-solvent is added for negative pressure filtration, causing phase separation of the liquid membrane into a web, thus obtaining a functionalized two-dimensional nanofiber mesh continuously covering the surface of the PTFE microporous membrane. The two-dimensional nanofiber mesh prepared by this invention has a diameter of 10–40 nm and a pore size of 0.5–1 μm; the PTFE microporous membrane / two-dimensional nanofiber mesh composite membrane has a porosity ≥90%, a filtration efficiency for metal ions ≥90%, and a mass transfer flux ≥500 L / m³. 2 •h has great application potential in the field of liquid filtration and separation.

The invention discloses an intelligent response type ultra-high voltage transmission line slope reinforcing and monitoring system, and relates to the technical field of geotechnical engineering and slope protection. A humidity response micro-valve covering layer is formed by compounding a microporous film and a weather-proof film, and a hydrogel micro-valve array is arranged on the inner layer of the humidity response micro-valve covering layer. The shape memory prestress anchoring unit adopts a hollow shape memory anchor rod, a spiral drainage micro-channel is arranged in a cavity, and a strain sensing element is embedded in the cavity. The energy collection and control module collects energy through electromagnetic induction of a power transmission line and slope friction or a piezoelectric device. And the membrane-penetrating self-repairing sealing interface adopts a coating containing microcapsules to perform long-term sealing on the membrane-penetrating point and the welding seam of the anchor rod. The bionic plant-growing module is of a three-dimensional printed bionic root system structure, is aligned to a micro-valve covering layer steam exhaust area and is fastened to the anchor rod. The system can remarkably inhibit rainwater infiltration in rainy seasons, release water vapor under the film in dry seasons and drive prestress adjustment through energy self-sufficiency, so that the long-term stability and durability of the side slope are remarkably improved.

The invention discloses a regulation and control system for anaerobic digestion and a magnetic charcoal preparation method thereof, which effectively achieve the purposes of increasing methane yield and reducing system energy consumption, and comprises: an anaerobic fermentation unit, which is provided with an aeration device and a heat exchanger; the micro-nano bubble generation unit is connected with the aeration device through a pipeline and comprises a switchable gas source for providing at least one of H2, N2 and CO2; the bubble generation assembly adopts a composite structure of a microporous membrane and a Venturi tube; the magnetic charcoal adding unit is connected with the anaerobic fermentation unit through a sealing pipeline and comprises a storage tank and a screw feeder; the intelligent control unit comprises a sensor array and an executing mechanism, the structure is novel, the conception is ingenious, operation is easy and convenient, the effects of accurately controlling the particle size of bubbles and maintaining the interface potential are effectively achieved, and the effect of intelligently switching gas components and the charcoal adding amount is achieved.

The application discloses a cigarette flavor microcapsule surface cleaning device, which comprises a main chamber, at least three material placing chambers are divided in the main chamber, diffusers are arranged at the bottom of the material placing chambers, the air inlet ends of the diffusers are connected with the air outlet ends of bubble generators arranged at the lower side of the material placing chambers, flow guide pipes are arranged at the middle positions of the main chamber, liquid injection pipes are distributed around the flow guide pipes, the liquid injection pipes are connected with flange pieces on the material placing chambers, the multiple-chamber independent cleaning supports multiple batches of synchronous cleaning, significantly improves single processing capacity, the chambers are independent of each other, cross contamination is avoided, the purity of different batches of microcapsules is ensured, the diffusers at the bottom are connected with the bubble generators, the cleaning liquid is circulated by small bubbles, the microcapsules are turned over, the cleaning coverage is improved, the hydrophobic microporous membrane material improves the quality of bubbles, liquid leakage is prevented, and the cleaning process is stable and controllable.

The aim of the present invention is to provide a microporous multilayer separator and a secondary battery comprising same, the microporous multilayer separator having a low coating weight per unit area, a thin coating layer, and a low heat shrinkage rate, and thus having improved energy density and safety, thereby being suitable for use in a lithium-ion secondary battery. To this end, provided is a microporous multilayer separator, comprising: a polyolefin-based microporous membrane; and an inorganic coating layer which is applied on one side or both sides of the microporous membrane and in which two or more types of inorganic particles are bound by an organic binder, wherein the inorganic particles comprise first inorganic particles and second inorganic particles, wherein the first inorganic particles have an average diameter (D50) of 0.1-10.0 μm, and the second inorganic particles have an average diameter (D50) of 50 % or less of the average diameter (D50) of the first inorganic particles.

The invention discloses a hydrochloric acid purification and rectification method, which belongs to the technical field of compound purification, and comprises the following steps: sequentially carrying out high-order temporary storage, normal-pressure rectification, condensation collection, quality detection and filtration treatment on industrial-grade hydrochloric acid to realize graded removal of volatile impurities and non-volatile impurities in hydrochloric acid; wherein in the filtering step, a filtering device formed by compounding two layers of long-acting microporous membranes is adopted, and the microporous membranes are polytetrafluoroethylene long-acting microporous membranes prepared by adopting a specific lubricant system and have stable microporous structures and excellent strong acid resistance. Meanwhile, hydrochloric acid waste gas generated in the rectification and packaging process is subjected to water absorption treatment, and waste gas treatment and resource recycling are achieved. Compared with the prior art, the process flow is simple, the applicability is high, the filtering stability and the operation reliability are high, the hydrochloric acid purification quality can be effectively improved, the comprehensive operation risk of the system is reduced, and the method is suitable for industrial popularization and application.

The utility model discloses a high-temperature steam recycling device which comprises a direct heat exchange steam pipeline, an indirect heat exchange steam pipeline, a heat exchange condenser a and a cold medium pipeline, the direct heat exchange steam pipeline is communicated with a fine filter box, and a microporous membrane is arranged in the fine filter box. Steam output by the fine filter box is communicated with the mixing tank through an output pipeline and an indirect heat exchange steam pipeline, and the mixing tank is communicated with the heat exchange condenser a through a condensation pipeline. According to the high-temperature steam recycling device, alumina particles with the particle diameter larger than that of water vapor drop particles or aluminum hydroxide suspended solids which are not completely decomposed in steam are filtered and separated in a microporous filtering mode, the temperature of the alumina particles or the aluminum hydroxide suspended solids is increased in a compression mode, and the alumina particles or the aluminum hydroxide suspended solids are recycled through heat exchange and then enter the next condenser to be released, so that the temperature of the alumina particles or the aluminum hydroxide suspended solids is reduced; therefore, heat energy can be recycled, meanwhile, the recycling efficiency of condensate water can be improved, and waste of water resources and heat energy is avoided.

The present invention relates to redox flow battery system. In particular, the present invention relates to low-cost Zinc-polyiodide redox flow battery (ZIFBs) with a low-cost electrolyte additive and a composite membrane comprising a microporous membrane and a cation conducting membrane.

The utility model relates to the technical field of soaking devices, and discloses a self-cleaning microporous membrane balloon catheter soaking device which comprises a box body, a sealing ring is arranged at the bottom of the box body, a rotating shaft is installed in the sealing ring, a baffle ring is fixedly connected to the outer portion of the lower end of the rotating shaft, and the lower end of the baffle ring is provided with a sealing ring. Limiting grooves are formed in the left side and the right side of the portion, located on the upper side of the baffle ring, of the rotating shaft, a lantern ring is arranged outside the upper end of the rotating shaft, limiting strips are fixedly connected to the left side and the right side of the inner wall of the lantern ring, and the outer walls of the limiting strips are connected to the inner sides of the limiting grooves in an up-down sliding mode. According to the balloon catheter soaking device, balloon catheters can be limited and fixed through the arranged fixing clamps, the multiple balloon catheters can be separated through the arranged containing disc, the situation that the balloon catheters are wound and damaged during soaking is avoided, soaking liquid in the box body can be pumped out through the gathering opening through the arranged conveying pump, and the soaking liquid is injected into the filtering box through the conveying pipe; and the soaking liquid is filtered through the filter plate, so that impurities in the soaking liquid are removed.

The invention discloses a holographic nuclear micropore anti-counterfeiting film with a dynamic pattern and a production process thereof, the holographic nuclear micropore anti-counterfeiting film with the dynamic pattern comprises a nuclear micropore film layer, a digital spraying layer and a holographic pattern layer which are sequentially arranged from top to bottom, and the digital spraying layer is arranged above the nuclear micropore film layer through a digital spraying process and forms the dynamic pattern; the holographic pattern layer is arranged above the dynamic pattern layer, and the dynamic pattern of the digital spraying layer is matched with the holographic pattern layer and the nuclear microporous film layer to form a multi-level anti-counterfeiting structure with the dynamic pattern, so that the comprehensive anti-counterfeiting performance of the anti-counterfeiting film is improved.

The invention discloses a preparation method of a high-flux anti-pollution nanofiltration membrane based on nanorods. The preparation method comprises the following steps: treating cerium nitrate hexahydrate and sepiolite nanoparticles to obtain nanorods, dispersing the nanorods in a water-phase monomer solution to obtain a nanorod / water-phase dispersion liquid, activating a microporous membrane to obtain an active base membrane, immersing the active base membrane in the nanorod / water-phase dispersion liquid to obtain a water-phase impregnated membrane, and drying the water-phase impregnated membrane to obtain the water-phase impregnated membrane. And immersing the water-phase impregnated membrane in an organic solvent solution of acyl chloride monomers, airing in the air to obtain an intermediate membrane, washing the intermediate membrane with deionized water, and staying in a drying oven to obtain the high-flux anti-pollution nanofiltration membrane. The product has high water flux recovery rate FRR to bovine serum albumin (BSA) and high flux to magnesium sulfate, has good anti-pollution performance and high flux, and solves the technical bottleneck that anti-pollution modification of an existing nanofiltration membrane brings negative effects on permeability.

This invention relates to the field of pet care product technology, and discloses a pet oral care spray and its preparation method. The preparation method employs a low-temperature gradient stepwise dissolution process: glucose oxidase is pre-dissolved at low temperature to obtain pre-solution A; bovine colostrum powder and lactoferrin are dissolved at low temperature to obtain protein pre-solution B; honey, folic acid, and vitamin D3 are dissolved at room temperature to obtain excipient pre-solution C; lysozyme is added to protein pre-solution B and stirred to dissolve; then pre-solution A and excipient pre-solution C are combined sequentially, the pH is adjusted, and purified water is added to make up the volume; the mixture is filtered through a microporous membrane for sterilization, and then filled and sealed under inert gas protection. This preparation method effectively protects the biological activity of each active protein and enzyme, achieving a long shelf life without the need for additional chemical preservatives. The resulting spray does not contain irritating ingredients such as alcohol and menthol, and is suitable for improving stomatitis, inhibiting plaque and tartar, and alleviating halitosis in pets of all ages and breeds.

The utility model discloses a standard metric thread waterproof and breathable pressure balance valve, include: upper cover, surface circumferential even distribution several U shape through -hole, be used for air exchange and block foreign matter and enter, base, with upper cover cooperation and connection, constitute valve body main part, inner cover, be located on the channel of inside air exchange of base, waterproof and breathable membrane, make by the modification treatment of the surface hydrophobic oleophobic of expanded polytetrafluoroethylene ePTFE microporous membrane, micropore diameter is 0.01~15um, fixed in the air intake side of inner cover, form waterproof and breathable barrier, through above -mentioned mode, the utility model can effectively solve the sealing problem of new energy automobile battery package in the use process because of the internal and external pressure difference, prevent the invasion of water vapor, dust and chemical liquid simultaneously, guarantee the safe operation of battery package, prolong the battery life, improve the reliability and safety of new energy automobile.

An improved microporous membrane is described herein. The microporous membrane may be used as a battery separator membrane, separator membrane, base membrane or membrane with various uses. The improved microporous membranes described herein may be dry polyolefin membranes and may be used as battery separator membranes or components of composite materials or battery separator membranes. The battery separator or composite may be used in energy storage devices including primary batteries, secondary batteries, fuel cells, capacitors, or supercapacitors.

A microporous membrane is provided comprising 1) an organic polymeric matrix and 2) a particulate filler distributed throughout the matrix. The matrix comprises: a polyolefin component comprising ultra-high molecular weight polyethylene present in the organic polymeric matrix in an amount of 1 to 80 wt%; and an aliphatic polyketone polymer present in the organic polymeric matrix in an amount of 1 to 80 wt%. The particulate filler exhibits a total particle size in the range of 5 to 40 microns, is distributed throughout the organic polymeric matrix, and is present in the microporous membrane in an amount of 10 to 90 wt% based on the total weight of the microporous membrane, as determined by use of a laser diffraction particle size instrument.

The utility model provides a microfiltration membrane filter which comprises a supporting pipe, a connecting port, a fixing buckle, a gland, a medium inlet, a filter element support, a filter element and a medium outlet, the connecting port is fixedly installed at the top of the supporting pipe, the fixing buckle is installed on the outer side of the connecting port, and the gland is installed on the outer side of the connecting port in an overturning mode. The fixing buckle is fixed on the outer side of the connecting port; the medium inlet is fixedly installed above the gland, the filter element support and the filter element are arranged in a staggered mode, and the filter element support and the filter element are installed in the supporting pipe in a sliding mode; the medium outlet is fixedly formed in the bottom end of the supporting pipe; due to the arrangement of the filter element bracket and the filter element, the integral stability is high, the filter membrane is not easy to damage, and the filtering effect is strong.

The invention belongs to the technical field of functional materials, and discloses an amidoxime-based chitosan microporous membrane adsorption material as well as a preparation method and application thereof. According to the amidoxime-based chitosan microporous membrane adsorption material, a chitosan microporous membrane is used as a matrix, and amidoxime groups are grafted on the matrix; the adsorption material has a microporous structure, the average pore size is 0.05-0.3 mu m, and the bacteriostasis rate on escherichia coli and staphylococcus aureus is not lower than 90%. The amidoxime group introduced in the invention has specific chelating ability to uranyl ions. Even in a simulated salt lake brine environment in which high-concentration competitive cations exist, the membrane adsorption material can still maintain high-selectivity adsorption on uranium, the extraction rate can reach 86% or above, and extremely high ion interference resistance is shown. The broad-spectrum antibacterial property of the chitosan base material is creatively utilized, so that the antibacterial rates of the obtained membrane adsorption material on escherichia coli and staphylococcus aureus exceed 90%.

The invention relates to the technical field of resource recovery of waste mercury catalysts, and particularly discloses a method and a device for recovering mercury from a waste mercuric chloride catalyst based on ultrasonic-assisted acidic thiourea leaching. The method comprises the following steps: crushing the waste catalyst, mixing the crushed waste catalyst with an acidic thiourea leaching agent with a specific concentration in proportion, and leaching under a specific ultrasonic condition to enable mercury to form a soluble complex to enter a solution; separating the leachate through a microporous membrane, and reducing the filtrate through zinc powder to obtain mercury precipitate; and finally, centrifuging, washing and drying to obtain high-purity metal mercury. The device system integrates equipment such as a catalyst crusher, an ultrasonic leacher, a microporous membrane separator, a reaction kettle and a centrifugal machine. According to the method, efficient recovery of mercury is achieved through a mild wet process, the leaching rate reaches 90% or above, the purity of the reduced mercury product is larger than or equal to 99.5%, and the method has the advantages of being low in energy consumption, small in pollution and stable and reliable in process.

The present invention is a polyolefin microporous film having a polyethylene-based resin layer containing a polyethylene-based resin and a polypropylene-based resin layer containing a polypropylene-based resin, in which the content of the polyethylene-based resin in the total mass of the polyolefin microporous film is 5-45 mass%, the porosity of the polyolefin microporous film is 42-62%, and the thickness of the polyolefin microporous film is 20-30 [mu] m. The surface aperture ratio of the polypropylene resin layer is 5%-30%, and the surface aperture ratio of the polyethylene resin layer is 5%-20.6%.

The invention discloses a nuclear micropore anti-counterfeit label with digital printing images and texts and a production process thereof, the anti-counterfeit label comprises a nuclear micropore film layer, a bonding layer, an optical film layer and a digital printing layer which are sequentially distributed from bottom to top, the nuclear micropore film layer is provided with a nuclear micropore area, the nuclear micropore area is provided with set patterns / characters, and the nuclear micropore film layer is provided with a positioning cursor; the bonding layer is arranged above the nuclear microporous membrane layer; the light film layer is arranged above the bonding layer and is compounded with the nuclear microporous film layer through the bonding layer; the digital printing layer is arranged above the optical film layer, the digital printing layer is provided with set digital printing patterns in a positioning mode through a positioning cursor, a multi-level anti-counterfeiting structure is formed through the digital printing patterns and the nuclear micropore area, the anti-counterfeiting performance is improved, the digital printing patterns are printed in a positioning mode through the positioning cursor, and the anti-counterfeiting effect is improved. The position precision between the digital printing pattern and the nuclear micropore area is improved, identification and distinguishing are easy, and the copying difficulty is large.

The utility model belongs to the field of in-vitro cell culture and exposure, and particularly relates to a cell culture exposure unit, a cell culture exposure device and a bionic breathing type exposure system. The cell culture exposure unit is provided with a microporous membrane, a gas chamber and a liquid chamber, the gas chamber and the liquid chamber are located on the two sides of the microporous membrane respectively, a refining baffle is arranged at the position, close to the microporous membrane, in the liquid chamber, and the refining baffle is provided with a microporous structure used for refining CO2 exhaled by the CO2 exhaling device. And the plate surface of the refining baffle plate faces the microporous membrane within the range of the plate surface. The device can better simulate that CO2 in the body stably and naturally passes through a gas-blood barrier, can adapt to different hierarchical positions and shunt flow of a bronchial tree, and is more objective and real in bionic simulation of inhalation exposure and in-vivo environment, thereby being beneficial to obtaining more real and scientific research results.

The application provides an electrochemical double membrane reactor and a wastewater treatment method based on the electrochemical double membrane reactor, and belongs to the field of membrane separation and electrochemical advanced oxidation technology. The wastewater treatment method based on the electrochemical double membrane reactor is coupled with membrane separation and electrochemical advanced oxidation technology, a first conductive microporous membrane is used as an anode membrane, a second conductive microporous membrane is used as a cathode membrane, the anode membrane generates hydroxyl radicals by electrolysis of water, the cathode membrane generates H2O2 by electro-reduction of oxygen and further converts the H2O2 into hydroxyl radicals through a Fenton catalyst, and the two cooperate to generate singlet oxygen, so that removal of refractory organic matter and / or heavy metals in wastewater is realized. The electrochemical double membrane reactor can make multiple active substances act together in the electrochemical process, removal of refractory organic matter and heavy metals in wastewater is realized, and the electrochemical double membrane reactor can be widely applied to treatment and reuse of industrial wastewater, landfill leachate and the like.

The invention discloses a high-rate long-life storage battery and a preparation method thereof, and relates to the technical field of storage batteries. The storage battery comprises a positive electrode, a negative electrode, a diaphragm and electrolyte, wherein the positive electrode adopts a niobium or tantalum doped lithium nickel cobalt lithium manganate material and a surface roughened aluminum foil current collector; the negative electrode adopts a mixture of graphite, a nitrogen-doped carbon nanotube and a tin-based alloy and a copper foil current collector with a copper-plated surface; the diaphragm is of a composite structure of a PE microporous membrane, a nano aluminum oxide ceramic coating and a PP microporous membrane; the electrolyte takes EC, DEC and EMC as a mixed solvent, and contains lithium hexafluorophosphate and lithium difluoro (oxalato) borate additives. The preparation method comprises the steps of electrode synthesis, slurry preparation, coating, assembly, formation and the like. The 5C charging efficiency of the storage battery is more than 95%, the 10C discharging capacity standard scale value is more than 90%, the 1C 3000-time circulation capacity retention rate is more than 80%, and the storage battery has high rate performance, long service life and high safety.