1142 results about "Microporous membranes" patented technology

Improved performance ion exchange membranes for use in REM, AEM and DMFC fuel cells, buffered fuel cells, hydrolysis, other applications comprise a molecular matrix of homopolymers, di-monomer, heteropolymers, copolymers, or block-polymers of fluorocarbon and hydrocarbon compounds combined with (i) skeletal support grid to improve durability, handling, reduce membrane swelling, and sequester dopants and nanoparticles from leakage; (ii) microporous membrane formed using a sacrificial filler process enhancing conductivity and limiting fuel crossover; (iii) hetero-ionomeric matrix of two-or-more membrane-bound acids e.g. sulphonic and phosphonic acid expanding usable range; (iv) permanent fillers enhancing conductivity and porosity including nanoparticles, metal-oxides, zeolites, silicates, GOs, CNTs, MOFs, POSS, and others; (v) ionic liquid doping to enhance membrane conductivity; (vi) membrane nanocoating preventing H2O2 diffusion; and / or (vii) catalytic nanocoating with metals, metal-oxides, and MOFs preventing atmospheric toxin catalyst poisoning. Combined with a heterogenous GDI, the IEM is integrated into iBFC power blade and energy bank applications.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an efficient ozone micro-nano bubble preparation system and a process method thereof. The device further comprises an ozone preparing unit, a gas conveying pipeline, a jet flow unit, a spiral mixing unit, a Venturi tube, a microporous membrane unit and a reaction unit. The ozone producing unit is connected with the jet flow unit through a gas conveying pipeline, the ozone producing unit comprises an ozone generator, and the gas inlet pressure is regulated and controlled through a gas valve in the gas conveying pipeline; and the jet flow unit is used for generating and conveying a mixed solution with ozone microbubbles. The jet flow unit enables the mixed liquid to form ozone microbubbles based on a Venturi effect and a hydraulic shearing effect; by arranging the jet flow unit, the spiral mixing unit, the Venturi tube and the microporous membrane unit, ozone micro-nano bubbles with high concentration and uniform size distribution can be generated under relatively low energy consumption, so that the treatment efficiency of the ozone micro-nano bubbles in the technical fields of wastewater treatment and environmental protection is improved.

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 provides a preparation method of a composite double-layer microporous membrane, and belongs to the technical field of separation membrane preparation, different lower-layer and upper-layer membrane casting solutions are prepared respectively, the separation membrane is prepared at one time by adopting a double-scraper casting and coating method, the upper layer is thermally induced phase separation, and the lower layer is thermally induced phase separation or non-solvent induced phase separation; the double-layer liquid membrane is subjected to pre-phase splitting and pore opening in a constant-temperature and constant-humidity environment, and enters a gel bath at a certain temperature after pre-phase splitting, and a microporous membrane with a certain membrane structure is formed under the action of RTIPS and NIPS. According to the invention, a co-coating method is adopted, and VIPS, RTIPS and NIPS are used for adjusting the pore structure of the membrane, so that the microporous membrane meeting different filtering requirements is prepared; the prepared membrane product is high in flux and high in yield; the preparation process is simple and conditions are mild: the microporous membrane prepared by the method is simple in process, mild in conditions and suitable for industrial production; and the membrane structures of the upper and lower membranes can be freely adjusted.

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 present application relates to the technical field of separator material preparation, and specifically relates to a microporous membrane, and a preparation method therefor and an application thereof. The microporous membrane comprises a polymer and an ionic liquid. Based on the total mass of the microporous membrane, the microporous membrane comprises 0.01 wt% to 5 wt% of the ionic liquid, optionally 0.1 wt% to 5 wt% of the ionic liquid. In the present application, an appropriate amount of the ionic liquid is introduced into the microporous membrane, and the ionic liquid can be continuously or discontinuously adsorbed on the surfaces of fibers in the microporous membrane. The ionic liquid is adsorbed on the surfaces of the fibers in the microporous membrane by means of a lipophilic end of the ionic liquid, thereby eliminating internal static electricity, also better reducing the reduction of ionic conductivity, increasing the migration speed of ions in an electrolyte, and reducing lithium dendrites. When the microporous membrane of the present application is used as a battery separator, an appropriate amount of the ionic liquid is added into the microporous membrane, so that the problem of electrostatic accumulation of the microporous membrane can be alleviated, and the microporous membrane has relatively low thermal shrinkage, avoiding problems such as affecting battery capacity, electrochemical safety.

The invention provides a high-wettability fiber composite battery diaphragm, which is characterized in that the composite battery diaphragm comprises a base membrane and a coating, and the coating is coated on one side or two sides of the base membrane; the coating comprises high-wettability polymer nanofibers, ceramic powder and a binder, the single-side thickness of the coating is 0.5-4 [mu] m, the high-wettability polymer nanofibers have polar functional groups, and the binder fixes the ceramic powder and the high-wettability nanofibers on the base membrane; the base membrane comprises at least one of a polyethylene microporous membrane, a polypropylene microporous membrane and a polypropylene / polyethylene composite microporous membrane, and the thickness of the base membrane is 3-20 microns. By adding the fibers with excellent wettability and the ceramic powder with high chemical stability, the wettability of the diaphragm coating is improved, and the battery performance is improved.

The invention provides an organ chip unit for simulating the pathogenesis of rheumatoid arthritis, and belongs to the technical field of cell culture. The chip comprises a top-layer chip, a bottom-layer chip and a middle microporous membrane, the top-layer chip and the bottom-layer chip are separated by the middle microporous membrane, and the middle microporous membrane is used for enabling cells in a cell culture space of the top-layer chip and cells in a cell culture space of the bottom-layer chip not to be in direct contact, but interaction of signal molecules and substance exchange can be carried out; synovial cells and cartilage cells are injected into the bottom-layer chip or the top-layer chip to be cultured. According to the invention, multi-cell three-dimensional co-culture can be realized. Through the additional stress stimulation co-culture part, the influence of pressure or tension on the cell environment can be judged, and the actual condition that rheumatoid arthritis joints receive pressure or tension for a long time can be simulated. The synovial cells and the cartilage cells are used, so that the structure of the inflammation joint in a living body can be truly reflected, and the interaction among various cell tissues can be reflected.

The preparation method comprises the following steps: mixing corncobs, a carbon source, rice husks, a nitrogen source and a conditioner, and adjusting the initial moisture content of the mixture to 55-65% so that the C / N ratio reaches (25-30): 1 to obtain a pile body; covering the surface of the pile body with a nano microporous membrane, starting an aeration system in a high-temperature stage, adjusting the air pressure difference inside and outside the membrane to 50-100Pa in a cooling stage, and continuously fermenting; after 7-10 days of fermentation, when the pH value of the base material is stable and the total nutrient meets the requirement, the fermentation is completed, the base material is bagged and sterilized, and the tricholoma matsutake cultivation base material is obtained. According to the method, the fermentation period is shortened to 1 / 3-1 / 2 of that of a traditional method, and the production efficiency is improved. In addition, the infectious microbe contamination rate of the base material is reduced, the purity and quality of the base material are improved, and a healthier environment is provided for growth of tricholoma matsutake. And the yield of tricholoma matsutake is increased by 40%. Not only is the yield of tricholoma matsutake increased, but also the nutritional value of tricholoma matsutake is improved, and higher economic benefits are brought to farmers.

The present invention provides a ship exhaust gas desulfurization device and a desulfurization method, which include a sulfur-containing ship exhaust gas pretreatment system, a seawater pretreatment system, a membrane contactor, and a seawater post-treatment system; the outlet end of the sulfur-containing ship exhaust gas pretreatment system is connected to the shell-side inlet end of the membrane contactor for sending the dust- and oil-removed exhaust gas into the shell side of the membrane contactor; the outlet end of the seawater pretreatment system is connected to the tube-side inlet end of the membrane contactor for sending the pretreated seawater into the tube side of the membrane contactor; the membrane contactor is a membrane contactor filled with polytetrafluoroethylene hollow fiber hydrophobic microporous membranes; the inlet end of the seawater post-treatment system is connected to the tube-side outlet end of the membrane contactor for post-treating the seawater after absorbing sulfur dioxide and oxidizing sulfite into sulfate. The ship exhaust gas desulfurization device described in the present invention has a high integration degree, a compact volume, and a high desulfurization efficiency, can achieve efficient desulfurization of ship exhaust gas, and has good application prospects.

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 polytetrafluoroethylene microporous membranes, and relates to an Al2O3 / PTFE composite microporous membrane and a preparation method and application thereof.The Al2O3 / PTFE composite microporous membrane is composed of Al2O3 nanoparticles and PTFE resin, the porosity is 65%-95%, the thickness is 3-25 microns, the average pore size is 0.10-1.5 microns, the transverse and longitudinal tensile strength is larger than or equal to 20 MPa, and the water contact angle is smaller than or equal to 90 degrees. According to the invention, the Al2O3 / PTFE composite microporous membrane is endowed with good surface wettability and excellent mechanical property by utilizing self-humidifying and in-situ reinforcement of Al2O3 nanoparticles, and the Al2O3 / PTFE composite microporous membrane is mainly applied to a reinforcing material of a proton membrane. The preparation process is simple, and industrial popularization is easy to realize.

The purpose of the present application is to provide: a separator for a power storage device, which has high adhesion to an electrode and low thermal shrinkage, and which is capable of improving the cycle characteristics and output characteristics of a power storage device; and a power storage device provided with the separator. This separator for an electricity storage device comprises a base material, which is a polyolefin microporous film containing a polyolefin as a main component, and a cover layer, which is disposed on at least one surface of the base material. The base material has a film thickness of 1 [mu] m to 30 [mu] m and an air permeability of 500 sec / 100 cm3 or less. The cover layer contains a particulate polymer of a thermoplastic polymer and an inorganic filler. The particulate polymer includes a protruding particulate polymer that protrudes from the cover layer by at least 0.1 times the thickness of the inorganic filler portion of the cover layer. The polyolefin microporous membrane has a porosity after compression of 30% or more as measured after compression of the base material under conditions of a temperature of 70 DEG C, a pressure of 8 MPa, and a compression time of 3 minutes, and / or has a crystal long period of 37.0 nm or more as measured by a small-angle X-ray scattering (SAXS) method.

The invention is suitable for the technical field of ion exchange membranes, and provides an antioxidant ion exchange membrane and a preparation method thereof.The antioxidant ion exchange membrane comprises a modified microporous membrane and ion exchange resin, the modified microporous membrane comprises a polytetrafluoroethylene fiber membrane and a coating, and the surface of the polytetrafluoroethylene fiber membrane is coated with the coating. The coating is prepared from the following raw materials: modified agarose, modified polyethylene glycol, modified nano cerium dioxide, nano titanium dioxide and water. According to the antioxidant ion exchange membrane provided by the invention, the modified microporous membrane is manufactured, and the modified microporous membrane comprises a polytetrafluoroethylene fiber membrane and the coating coated on the surface of the polytetrafluoroethylene fiber membrane; according to the coating, the modified agarose, the modified polyethylene glycol and the modified nano cerium dioxide are added and have a synergistic effect, so that on one hand, the oxidation resistance of the ion exchange membrane can be improved, and on the other hand, the mechanical property of the ion exchange membrane can be improved.

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 discloses a double-adsorption type solid-liquid two-phase flow dust removal device, belongs to the technical field of wet spraying dust removal, and aims to solve the problems of high water consumption, low dust removal efficiency and poor dust removal effect of coal in the prior art. The device comprises a magnetite powder suspension atomization unit, a water spraying nozzle, a dust removal microporous membrane, an electromagnet pore plate and an axial flow fan which are sequentially arranged in the flowing direction of dust airflow. The water spraying direction of the water spraying nozzle faces the dust removal microporous membrane, and spraying water sprayed by the water spraying nozzle forms a water membrane on the dust removal microporous membrane; in the dust removal process, the electromagnet pore plate is electrified, so that magnetite powder is adsorbed on the surface, back to the electromagnet pore plate, of the dust removal microporous membrane; after dust removal is completed, the electromagnet pore plate is powered off, so that the magnetite powder is separated from the surface, back to the electromagnet pore plate, of the dust removal microporous membrane. The device can be used for coal dust removal.

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 waterproof and moisture-permeable composite film and a preparation method thereof, a waterproof and moisture-permeable fabric and clothes. The waterproof moisture-permeable composite film comprises a microporous film, a ceramic layer and a waterproof layer, wherein the ceramic layer is arranged on the surface of one side or two sides of the microporous film in a laminated manner; the waterproof layer is arranged on the surface of the ceramic layer in a laminated manner; the ceramic layer comprises ceramic particles, the waterproof layer comprises a cross-linked substance of a waterproof finishing agent, or the waterproof moisture-permeable composite film comprises a microporous film and a composite layer laminated on the surface of one side or two sides of the microporous film, and the composite layer comprises ceramic particles and a cross-linked substance of a waterproof finishing agent. The waterproof and moisture-permeable composite film can be used for preparing a waterproof and moisture-permeable fabric. The waterproof and moisture-permeable composite film disclosed by the invention has excellent waterproof performance and washing resistance while keeping good air and moisture permeability.

The invention provides a preparation method and application of a dual-cleaning polytetrafluoroethylene microporous membrane, and the preparation method comprises the following steps: 1) heating polyethyleneimine and 1, 3-propane sultone in one step to form a polyion liquid, and dissolving the polyion liquid and dopamine in a Tris aqueous alkali to obtain a buffer reaction liquid; 2) soaking a polytetrafluoroethylene microporous membrane in a buffer reaction solution, heating and reacting, and then taking out to obtain a first microporous membrane; 3) soaking the first microporous membrane in a ferric chloride hexahydrate aqueous solution for heating reaction, and then taking out the first microporous membrane to obtain a second microporous membrane; 4) soaking the second microporous membrane in a copper acetate methanol solution for heating reaction, and then taking out to obtain a third microporous membrane; 5) soaking the third microporous membrane in a methanol solution of 2, 5-dihydroxy terephthalic acid, heating and reacting, and then taking out to obtain a fourth microporous membrane; and 6) washing and drying the fourth microporous membrane to obtain the dual self-cleaning polytetrafluoroethylene microporous membrane. The dual self-cleaning polytetrafluoroethylene microporous membrane is high in separation efficiency, high in flux recovery rate and low in pollution rate in treatment of high-viscosity emulsified oil-containing wastewater.

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 discloses a washable waterproof moisture-permeable composite material, a preparation method thereof, a waterproof moisture-permeable fabric and clothes. The washable waterproof moisture-permeable composite material comprises a three-layer composite structure, the ceramic coating comprises first ceramic particles, the hydrophilic coating comprises second ceramic particles and a hydrophilic polymer, the particle size D50 of the first ceramic particles is larger than the maximum aperture of the microporous membrane, the particle size D50 of the second ceramic particles is smaller than 1000 nm, and the particle size D50 of the hydrophilic polymer is larger than the maximum aperture of the microporous membrane. The ratio of the particle size D50 of the first ceramic particles to the particle size D50 of the second ceramic particles is 0.1-10. The washable waterproof moisture-permeable composite material can be used for preparing a waterproof breathable fabric. According to the washable waterproof moisture-permeable composite material disclosed by the invention, the peel strength of the hydrophilic coating and the washable performance of the whole washable waterproof moisture-permeable composite material are effectively improved while good air permeability is maintained.

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 invention relates to a preparation method of a mogroside phospholipid complex. The preparation method comprises the following steps: (1) mixing a mogroside extract and lecithin according to a certain proportion to obtain a first turbid solution; (2) adding tetrahydrofuran into the first turbid solution obtained in the step (1) to obtain a second turbid solution, and performing ultrasonic treatment on the second turbid solution to uniformly disperse the second turbid solution to obtain a first reaction solution; (3) stirring the first reaction solution obtained in the step (2) until the first reaction solution is clear and transparent to obtain a second reaction solution; (4) carrying out reduced pressure evaporation on the second reaction liquid obtained in the step (3) to remove tetrahydrofuran so as to obtain an oily film; and (5) adding a proper amount of chloroform into the oily film obtained in the step (4) to obtain a third turbid solution, filtering the obtained third turbid solution through a microporous filter membrane to obtain a filtrate, carrying out rotary evaporation to obtain the filtrate, and removing the chloroform to obtain the momordica grosvenori saponin phospholipid compound. Compared with the MGE, the fat solubility of the MGE-PC is improved by 4.34 times; and the absorption rate of MGE-PC is obviously improved by 2.7 times.

The invention discloses a polyvinylidene fluoride network-like microporous membrane, a preparation method and application. The polyvinylidene fluoride network-like microporous membrane has an average pore size of 0.40-0.55 [mu] m, an average pore size distribution (PSD) of 65-80%, a tensile strength of 6.5-11 MPa and an elongation at break of 150-350%. The membrane surface of the polyvinylidene fluoride network microporous membrane is provided with a skin layer, the inside of the membrane is provided with a network pore structure, and the polyvinylidene fluoride network microporous membrane has the advantages of high mechanical strength, high water flux, high protein adsorption capacity, high filtering precision, high stability and the like.

The invention discloses a riverway revetment with a water pollution treatment function, which comprises a plurality of straight sheet piles arranged in sequence, connecting pieces are arranged between adjacent straight sheet piles, sliding grooves are respectively formed in two sides of each straight sheet pile, each connecting piece comprises a central shaft, two ends of each central shaft are respectively connected with sliding blocks, the sliding blocks are slidably mounted in the sliding grooves, and the central shafts are connected with the sliding blocks. A roller is rotatably sleeved on the central shaft, a plurality of oil absorption felts and a plurality of flexible microporous membrane bags are mounted on the roller, and microbial fillers are filled in the flexible microporous membrane bags. According to the invention, the oil absorption felts can absorb oil stains gathered near the sheet piles, and the oil absorption felts can be regularly replaced and cleaned, so that the pollution of domestic sewage discharge to water in a river channel is reduced. And organisms in the microbial filler in the flexible microporous membrane bag are used for carrying out biological treatment on organic matters in the water. And the flexible microporous membrane bag is convenient to replace. The connecting piece can be used for connecting the straight plate pile and can swing along with water waves, and the acting effect of the oil absorption felt and the flexible microporous membrane bag is improved.

The purpose of the present disclosure is to provide: a safer polyolefin microporous membrane; an electricity storage device separator, electricity storage device assembly kit, and electricity storage device using the polyolefin microporous membrane; and an electricity storage device. In one embodiment, the polyolefin microporous membrane comprises at least one of each of a layer A and a layer B, a polyolefin contained in at least one of the layer A and the layer B has one or more types of functional groups, and a crosslinked structure is formed by (1) the functional groups undergoing condensation reactions with each other, (2) the functional group reacting with a chemical substance inside the electricity storage device, or (3) the functional group reacting with a different type of functional group, after accommodation in the electricity storage device.

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 present disclosure provides a composite cooling film including a micro-voided film layer that has a solar weighted reflectivity at normal incidence of electromagnetic radiation over a majority of wavelengths in a range of 400 nanometers (nm) to 2500 nm of 0.8 or greater. The composite cooling film also includes a UV reflecting composite layer disposed adjacent to a major surface of the micro-voided film layer. The UV reflecting composite layer includes a polymeric matrix and inorganic particles distributed in the polymeric matrix. The UV reflecting composite layer exhibits an average reflectance of electromagnetic radiation of at least 55% over a wavelength bandwidth of at least 30 nm within a wavelength range from 300 nm and up to but not including 400 nm.

The invention relates to the technical field of food detection, in particular to a method for simultaneously detecting various organophosphorus pesticide residues in prefabricated vegetables. Comprising the following steps: (1) crushing a pre-prepared vegetable sample to obtain a pre-prepared vegetable sample; (2) mixing the pre-prepared vegetable sample with water, acetonitrile, anhydrous magnesium sulfate and sodium chloride, oscillating for 10-20 minutes, centrifuging, taking supernatant, purifying the supernatant, and filtering with a microfiltration membrane to obtain a sample to be detected; and (3) detecting the peak area of the organophosphorus in the sample to be detected by high performance liquid chromatography-mass spectrometry, and substituting the obtained peak area into the standard curve to obtain the content of the organophosphorus, according to the method disclosed by the invention, the 10 kinds of organophosphorus pesticide residues, namely dimethoate, dichlorvos, phorate, isocarbophos, chlorpyrifos, fenthion, malasofos, fenthion sulfone, malathion and omethoate, in the prefabricated vegetable can be detected at the same time, and the recovery rate is 90% or above. And a basis is provided for detection of pesticide residues in the prefabricated vegetables.

The invention relates to a preparation technology of a polyurethane nanoscale microporous membrane for protective clothing, and belongs to the technical field of clothing fabric preparation, and the preparation technology specifically comprises the following steps: extracting silk fibroin and carrying out hydrophobic modification to obtain modified silk fibroin; then, the modified cellulose and polyurethane are mixed and dissolved in a solvent, a pore-forming agent and breathable particles obtained by mixing the modified cellulose and aerogel powder are added, and a mother solution is prepared; and finally, preparing a membrane by using the mother liquor, thereby obtaining the polyurethane nano-scale microporous membrane for the protective clothing. According to the process, modified silk fibroin and a polyurethane material are mixed, and breathable particles obtained by mixing modified cellulose and aerogel powder are added, so that the mechanical property of the membrane is remarkably improved, and the breathability is optimized. Meanwhile, through acetylation treatment on silk fibroin and modification on carboxymethyl cellulose by using dopamine hydrochloride, the overall performance of the material and the stability in the preparation process are further improved.