655 results about "Microporous membranes" patented technology

The invention relates to the technical field of microbial culture, and provides a culture device for agricultural microbial agent production and a use method, the culture device comprises a culture box, and the top of the culture box is hermetically and detachably provided with a box cover. According to the device, the air pump is controlled by the controller to be started, so that the air pressure in the closed space is increased, the air passes through the non-woven fabric and the polymer microporous membrane, more tiny bubbles can be generated under the action of the polymer microporous membrane, a nutrient solution flows and is mixed, and the stirring effect on the nutrient solution is achieved; a nutrient solution in the incubator flows into the culture dish through the liquid discharge pipe, so that the stirring of the nutrient solution and the injection of the nutrient solution into the culture dish to be mixed with a microbial inoculum can be completed without using more structural components, the operation is simple, and the condition of pollution caused by improper cleaning is avoided; therefore, the subsequent microbial agent culture effect is improved.

The invention discloses a polytetrafluoroethylene microporous membrane as well as a preparation method and application thereof, and belongs to the technical field of polytetrafluoroethylene microporous membranes. According to the invention, the polytetrafluoroethylene microporous membrane added with different amounts and different types of lubricants is prepared by a thermomechanical two-way stretching method, and the pore structure is researched. According to the invention, the entanglement density, the average pore size, the porosity, the hydrophobic property and the mechanical property can be regulated and controlled by changing the quantity and the type of the lubricant. And a new idea is provided for preparing the high-performance PTFE biaxially oriented film, and the method has a good application prospect.

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 diaphragm material preparation, and particularly relates to a microporous membrane as well as a preparation method and application thereof. The microporous membrane comprises a polymer and an ionic liquid, and the microporous membrane comprises 0.01 wt%-5wt% of the ionic liquid, optionally 0.1 wt%-5wt% of the ionic liquid, based on the total mass of the microporous membrane. A proper amount of ionic liquid is introduced into the microporous membrane, the ionic liquid can be continuously or discontinuously adsorbed on the surfaces of the fibers in the microporous membrane, and the ionic liquid is adsorbed on the surfaces of the fibers in the microporous membrane through the oleophylic end of the ionic liquid, so that internal static electricity can be eliminated, and reduction of ionic conductivity can be better avoided; and the ion migration speed of the electrolyte is increased, and lithium dendrites are reduced. When the microporous membrane is used as a battery diaphragm, a proper amount of ionic liquid is added into the microporous membrane, so that the problem of electrostatic accumulation of the microporous membrane is solved, meanwhile, the microporous membrane has relatively low thermal shrinkage, and the problems that the battery capacity is influenced, the electrochemical safety is caused and the like are avoided.

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 present invention provides a waterproof breathable membrane, a preparation method therefor, and a composite fabric comprising same. The preparation method for a waterproof breathable membrane comprises: performing first mixing of a polyolefin raw material and a solvent to obtain a premixed gel; performing second mixing of an elastomer and a solvent, and then performing third mixing with the premixed gel to obtain a mixed gel; performing melt extrusion on the mixed gel to obtain an initial gel membrane, followed by performing initial stretching on a biaxial stretching machine, and then extracting by using an extracting agent to obtain an initial microporous membrane; and performing expanded stretching on the initial microporous membrane, and performing heat setting and rapid high-temperature treatment in sequence. The waterproof breathable membrane is prepared by the described preparation method. The composite fabric is composed of an inner layer fabric, an outer layer fabric, and the waterproof breathable membrane provided by the present invention which is compounded between the inner layer fabric and the outer layer fabric. The preparation method provided by the present invention facilitates industrial promotion and use, and the obtained product possesses excellent waterproof and breathable properties, as well as higher tensile strength and elongation at break.

The invention provides a polypropylene microporous membrane as well as a preparation method and application thereof. The polypropylene microporous membrane comprises polypropylene resin, an inorganic nano material and a coupling agent, the relative molecular mass of the polypropylene resin is in a range of 1000000 Da to 2000000 Da. The polypropylene resin is used as a matrix, the inorganic nano-material and the coupling agent are added at the same time to modify the polypropylene resin, and the polypropylene resin, the inorganic nano-material and the coupling agent have a synergistic effect, so that the mechanical strength, surface tension and other physical properties of the polypropylene film can be further improved; therefore, the base film is prevented from wrinkling and deforming in the preparation process of the composite current collector, and the production yield and the physical performance of the composite current collector are improved.

The purpose of the present disclosure is to provide: a separator for power storage devices, the separator having high adhesion to an electrode and a low thermal shrinkage ratio, while being capable of improving the cycle characteristics and output characteristics of a power storage device; and a power storage device which comprises this separator for power storage devices. A separator for power storage devices according to the present disclosure comprises: a base material which is formed of a polyolefin microporous membrane that contains a polyolefin as a main component; and a cover layer which is arranged on at least one surface of the base material.

The invention discloses a straw leavening agent suitable for a microfiltration membrane fermentation system and application of the straw leavening agent, and relates to the technical field of biology. The straw leavening agent comprises a microorganism combination. The microbial composition is prepared from bacillus subtilis (Bacillus subtilis) 1JN2, streptomyces globisporus (Streptomyces globisporus) XS2301 and myroides odortorius (Myroides odortorius) YW-1, and the microbial composition is prepared from bacillus subtilis (Bacillus subtilis) 1JN2, streptomyces globisporus (Streptomyces globisporus) XS2301 and myroides odortorius (Myroides odortorius) YW-1. The straw fermenting agent can improve the humification index in the straw composting process, remarkably shorten the composting period of crop straw and effectively reduce volatilization of irritant gas such as ammonia gas and hydrogen sulfide in the straw composting process. The straw leavening agent provided by the invention not only can efficiently treat crop straws, but also has the dual advantages of environmental protection and agricultural yield increase, and provides important technical support for agricultural sustainable development.

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.

Disclosed are a virus-removal composite membrane and a preparation method thereof. A virus-removal composite membrane comprises a main body, wherein the main body comprises: a porous substrate layer including a liquid inlet surface and a separation layer including a liquid outlet surface, the porous substrate layer is a microporous membrane layer formed by a first polymer, the separation layer is formed by a second polymer, and the first polymer and the second polymer are different polymer materials; in a region of the porous substrate layer close to one side of the separation layer, the second polymer permeates from a surface of the porous substrate layer into a pore structure of the porous substrate layer to form a bonding region, and pores formed by the second polymer in the bonding region are connected to pores of the separation layer.

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 high-molecular compounds, in particular to a PTFE microporous membrane and a preparation method and application thereof. The composite conductive material is prepared from the following components in parts by weight: 55 to 65 parts of PTFE dispersion resin, 5 to 8 parts of graphene quantum dot / carbon nanotube and metal organic framework composite conductive phase, 6 to 9 parts of POSS-graphene hybrid modified nano silicon dioxide, 7 to 10 parts of fluorosilane grafted polyether-ether-ketone-polyimide block copolymer, 3 to 5 parts of nano hydroxyapatite-chitosan composite particles and 10 to 15 parts of composite pore-foaming agent. 1 to 3 parts of organic montmorillonite; wherein the grafting rate of the block copolymer is 25-30%, the fluorine content is 12-15 wt%, and the silicon-oxygen bond density is 0.8-1.2 mmol / g. The preparation method has the advantages of good mechanical properties and stability, multifunction synergy, pollution resistance, good biocompatibility, process optimization, improvement of consistency, meeting of multi-field requirements, and wide application prospect.

The invention discloses an anti-ultraviolet portable high-elastic sunscreen clothing fabric and a preparation method thereof. The fabric is sequentially compounded with a skin-friendly layer, a high-elastic breathable layer, an anti-ultraviolet functional layer and a protective outer layer from inside to outside. The skin-friendly layer is formed by blending natural bamboo fibers and chitosan-containing regenerated cellulose antibacterial fibers according to the ratio of 7: 3, and it is ensured that the skin is comfortable and antibacterial; the high-elastic breathable layer is of a warp-knitted elastic mesh structure formed by blending 15-20 wt% of spandex and chinlon, and has both elasticity and breathability. According to the anti-ultraviolet function layer, 80-100 g / m < 2 > polyester fiber base cloth is coated with a coating containing nanometer titanium dioxide and zinc oxide (the total mass accounts for 8-12% of the polyurethane coating, and the mass ratio is 2: 1), and efficient and lasting sun protection is achieved. The protective outer layer is formed by compounding a polytetrafluoroethylene microporous membrane and a polyester fabric, so that the protective performance is improved. During preparation, each layer is precisely processed by adopting a specific process, such as ultrasonic dispersion of nanoparticles and hot-pressing compounding of a hot melt adhesive, and is finally laminated, compounded and molded. According to the scheme, the problems that a traditional sunscreen garment fabric is poor in breathability, not lasting in sunscreen, poor in skin-friendly performance and the like are solved.

The utility model discloses composite membrane cloth for an air cushion, and relates to the field of daily cosmetics, and the composite membrane cloth comprises a fabric layer and a microporous membrane layer. The fabric layer is an elastic fabric, is used as a base layer and can quickly and uniformly release liquid foundation; the microporous membrane layer is an SEBS membrane, a plurality of irregularly-shaped micropores are formed in the membrane, when the composite membrane cloth is pressed, the micropores are opened, the liquid foundation can sequentially, rapidly and uniformly pass through the micropores and the fabric layer, and when external force is not applied, the micropores can prevent the liquid foundation from leaking. Compared with common grid type single-layer cloth, the composite membrane cloth for the air cushion has the advantages that the advantages are obvious, materials can be quickly and uniformly discharged when being pressed, liquid foundation is difficult to seep even if shaking, lateral placement and inversion occur, and waste and pollution caused by liquid foundation leakage can be avoided.

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 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 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 discloses a preparation method of a polypeptide composition with anti-wrinkle and firming effects, and belongs to the technical field of cosmetic raw material preparation, and the preparation method comprises the following steps: S1, raw material pretreatment; s2, mixing the raw materials; s3, adjusting the pH value: adjusting the pH value of the polypeptide mixed solution to 5.5-6.5 by using a hydrophosphate or citric acid solution; s4, filtering and degerming: filtering and degerming the polypeptide mixed solution of which the pH value is adjusted through a 0.22 mu m microporous filter membrane to obtain a sterile polypeptide composition solution; and S5, filling: filling the sterile polypeptide composition solution into a proper packaging container. Through synergistic compatibility of five polypeptides such as palmitoyl pentapeptide-3 and acetyl hexapeptide-8, the anti-wrinkle and firming effects are achieved from four mechanisms of stimulating collagen regeneration, inhibiting neural signals, blocking protease degradation and resisting oxidation.

The utility model relates to the technical field of filtration and separation, and discloses a flat microporous membrane gas flux testing device which comprises an aluminum-sprayed iron plate, a gas inlet pipeline is arranged on the left front side of the aluminum-sprayed iron plate, the right end of the gas inlet pipeline is communicated with a gas inlet pneumatic hand slide valve, and a gas purification pressure regulating valve is arranged on the right side of the gas inlet pneumatic hand slide valve. And a first-stage precise pressure regulating valve is arranged on the right side of the gas purification pressure regulating valve. Compared with an existing testing device, the flat microporous membrane gas flux testing device has the following advantages that through mutual cooperation of multiple groups of structures, the device can conveniently and efficiently carry out pressure adjustment or flow adjustment, gas flux testing of a flat microporous membrane under different pressures can be simply and efficiently carried out, and the testing efficiency is improved. The effective test area of the flat microporous membrane clamp is specially designed, calculation can be reduced, and test data can be conveniently, efficiently and accurately obtained.

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 relates to the field of separation, and particularly discloses a preparation method of a hollow fiber microporous membrane and the hollow fiber microporous membrane. The preparation method of the hollow fiber microporous membrane comprises the following steps: preparation of a membrane casting solution: the membrane casting solution comprises the following raw materials in parts by weight: 30-40 parts of polyvinylidene fluoride, 70-75 parts of a diluent and 0.4-0.6 part of span 80, and the raw materials are uniformly mixed and subjected to vacuum defoaming to prepare the membrane casting solution; the weight-average molecular weight of the polyvinylidene fluoride is 800000; the diluent is prepared from 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imine salt and choline acetate according to the weight part ratio of 17 to 3; and extrusion molding: taking a diluent as a core liquid, carrying out spinning extrusion on the membrane casting liquid, cooling, winding, extracting and drying to obtain the hollow fiber microporous membrane. The hollow fiber microporous membrane provided by the invention can maintain high flux and reduce emission of VOCs at the same time.

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 invention relates to the technical field of adsorption materials, in particular to ZIF-90-biochar-MF composite foam as well as a preparation method and application thereof. The preparation method comprises the following steps: by taking melamine foam as a matrix, carrying out coordination on a methanol solution of zinc nitrate hexahydrate and imidazole-2-formaldehyde to form a ZIF-90 precursor; the preparation method comprises the following steps: adding a ZIF-67 precursor into biochar to form a load liquid, then adding the load liquid into melamine foam, and then adding hexadecylamine for hydrophobic modification to obtain the ZIF-90-biochar (at) MF composite foam. According to the preparation method, cetylamine is used as a hydrophobic modifier, ZIF-90 is loaded on a melamine foam skeleton by an in-situ growth method, and charcoal is added, so that the prepared material can construct a micron-scale rough layer on the surface of a microporous membrane, the roughness of the surface of the MF skeleton is increased, and due to the fact that the surfaces of ZIF-90 and charcoal are rich in hydrophobic functional groups, the surface of the MF skeleton can be effectively improved. The surface hydrophobicity is improved, and the oil absorption performance of the composite material is improved.

Described are filters and filter products that contain a microporous membrane for filtration, wherein at least one layer of the membrane has an average pore size less than 0.035 microns; the filter or filter product and its membrane may be used in an ultra-filtration or nano-filtration process such as for processing microelectronics or semiconductor processing fluids.

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 present invention discloses a device for in-situ extraction and collection of dissolved gas, comprising a microporous membrane water vapor separation extraction module, a multi-interface gas circuit, a pressure-resistant cabin, an exhaust solenoid valve, a high-pressure gas storage cylinder, a pressure gauge, a control panel, a gas collecting solenoid valve, a gas collecting cylinder, and a submersible pump; the microporous membrane water vapor separation extraction module comprises a microporous metal sintered block, a sintered block support plate, a microporous membrane, a microporous membrane support block, a sealing O-ring, a compression spring, a spring compression adjustment block, and a limit block. The gas released from the high-pressure gas storage tank is used to create a headspace environment with variable pressure; the pore size of the microporous membrane is larger than that of gaseous molecules, allowing gaseous molecules to pass through quickly, while liquid molecules are blocked on the outside of the membrane. The device for in-situ extraction and collection of dissolved gas of the present invention has the advantages of being able to solve the problems that the headspace equilibrium method cannot be applied to high-pressure environments and the low separation efficiency of polymer membranes; and achieving rapid and high-precision measurement of dissolved gas.