580 results about "Membrane layer" patented technology

The present application relates to a hybrid membrane for an electrochemical device, the hybrid membrane comprising: a membrane layer comprising: a modified metal-organic framework (MOF) material wherein the modified MOF material is a MOF material modified with one or more of a lithium salt, a carboxylic acid, or an amino acid, and a binder material, the adhesive layer is used for adhering the modified MOF material to the porous supporting layer so as to form a film layer on the porous supporting layer; and the porous support layer is used for providing mechanical support for the membrane layer. The present application also relates to a method for preparing the hybrid membrane, an electrochemical device comprising the hybrid membrane and the use of the hybrid membrane for inhibiting Lewis acid by-products in an electrochemical device.

The invention discloses a Fe / C loaded membrane module, a PN / A-MABR autotrophic nitrogen removal device, a preparation method and a sewage treatment method, and belongs to the technical field of sewage treatment. According to the invention, the problem that the treatment effect is influenced by NO3 <->-N accumulation in the existing membrane aeration coupling partial nitrification-anaerobic ammonia oxidation process is solved. Comprising a frame and a membrane body attached to the outer portion of the frame, the membrane body comprises a hydrophobic organic membrane layer, an iron-carbon material layer and a biological membrane layer which are sequentially arranged, and the hydrophobic organic membrane layer is attached to the outer portion of the frame. The iron-carbon material is added between the hydrophobic organic membrane layer and the biological membrane layer, the iron-carbon micro-electrolysis process is coupled with the dissimilatory process of nitrate generated by microbial metabolism, the removal of NO3 <->-N generated by anaerobic ammonia oxidation is enhanced, and the total nitrogen removal efficiency is improved.

To provide an analysis element and a manufacturing method thereof that can prevent an object to be analyzed from being unable to be analyzed appropriately.SOLUTION: A manufacturing method of this analysis element 100 includes the steps of forming a mask layer 20, forming a membrane layer 30, exposing a substrate 10, forming an introduction hole 13 and forming a protrusion 14 at the inlet end 13a of the introduction hole 13, and removing the protrusion 14 by wet etching the protrusion 14.SELECTED DRAWING: Figure 13

The present invention relates to a composite separator for a lithium metal battery, a preparation method for a composite separator, and a lithium metal battery. The composite separator for a lithium metal battery comprises a separator layer and an NF@MOF membrane layer, wherein the NF@MOF membrane layer is an NF membrane on which an MOF material is grown in situ. In the present invention, the separator layer is combined with the NF@MOF membrane layer, and the in-situ grown MOF material provides high ionic conductivity and low interfacial impedance, such that the prepared composite separator integrates high mechanical strength, high flexibility, high electrolyte wettability, a high liquid retention rate and excellent ionic conductivity; and the synergistic effect exerted by the components of the composite separator can promote the uniform deposition and stripping of lithium metal, suppress the growth of lithium dendrites, and prevent separator penetration that may lead to a short circuit or even fire and explosion accidents, thereby prolonging the cycle life of the lithium metal battery and improving the safety performance thereof. Thus, the composite separator of the present invention has broad application prospects in terms of lithium metal batteries.

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

The invention provides an intelligent response nano-film and application thereof in waste lead-acid storage battery electrolyte recycling, and relates to the technical field of waste lead-acid storage battery electrolyte recycling, the intelligent response nano-film breaks through performance limitation of an existing film system through a specific intelligent material structure, and when heavy metal ions such as Pb < 2 + >, Fe < 3 + > and Cu < 2 + > enter the film, the intelligent response nano-film can be recycled, and the service life of the intelligent response nano-film is prolonged. The metal ligands are combined with metal ions to cause local shrinkage or closing of pore channels, so that the active defense and intelligent blocking effects of blocking heavy metals are achieved; and when SO4 < 2-> and H < + > pass through the channel, membrane pore channels are kept in an open state, so that rapid acid flux (namely the amount of substance passing through the membrane layer in unit time) of sulfuric acid is realized. The intelligent response nano film has a programmable aperture of a polymer liquid crystal network and an intelligent response valve mechanism of metal, and selective separation of heavy metal and sulfuric acid is realized by stimulating reversible adjustment of an induced film structure.

An implantable device for delivery of a macromolecular drug compound is provided. The device comprises a core having an outer surface and a membrane layer positioned adjacent to the outer surface of the core. The core comprises a core polymer matrix within which is dispersed a drug compound having a molecular weight of about 5 kDa or more, the polymer matrix containing a hydrophobic polymer. The membrane polymer matrix includes from about 70 wt. % to about 99 wt. % of an ethylene vinyl acetate copolymer.

A building system and corresponding method may include a building structure. A building system and corresponding method may include a building envelope membrane installed on the building structure, the building envelope membrane comprising: a first release liner, wherein the first release liner comprises: a first polymer, and a UV stabilizer, wherein the first release liner includes 1 wt. % to 90 wt. % of the UV stabilizer based on a total weight of the first release liner, wherein the first release liner is an outer layer, wherein the first release liner is removable, a first adhesive layer, a membrane layer, wherein the first adhesive layer is positioned between the first release liner and the membrane layer; and a second adhesive layer, wherein the membrane layer is positioned between the first adhesive layer and the second adhesive layer, wherein the second adhesive layer contacts the building structure.

The invention relates to the technical field of intermediate membranes, in particular to a heat insulation type ionic intermediate membrane and a preparation method thereof.The heat insulation type ionic intermediate membrane is characterized in that hollow silicon dioxide nanotubes serve as filler, epoxy resin modified polyurethane emulsion serves as a base material, auxiliaries are added to prepare a heat insulation coating, and the ionic intermediate membrane layer is coated with the heat insulation coating to form a heat insulation layer; the preparation method comprises the following steps: carrying out amination on a hollow silicon dioxide nanotube by using 3-aminopropyltriethoxysilane, carrying out dehydration condensation on furan-2, 5-diketone and an amino group to synthesize maleimide so as to obtain a maleimide modified hollow silicon dioxide nanotube, and grafting furan carboxylic acid imidazolium salt polyionic liquid by using a Diels-Alder reaction so as to obtain a composite hollow silicon dioxide nanotube; aminated glass fibers, composite hollow silicon dioxide nanotubes, epoxy resin modified polyurethane emulsion and auxiliaries are mixed, and a reinforcing layer coating is obtained; and coating the lower surface of the ionic intermediate film layer with a reinforcing layer coating to form the reinforcing layer.

A method for the production of an ion-conducting membrane for a water electrolyser or a fuel cell is provided. The method comprises the step of mixing a first liquid stream comprising an ion-conducting polymer and a second liquid stream comprising a cerium-containing compound in-line to form a coating composition. The coating composition is then deposited onto a substrate to form a membrane layer. An apparatus for the production of an ion-conducting membrane for a water electrolyser or a fuel cell is also provided.

The invention discloses a neural microelectrode for electrical stimulation combined with drug release and a preparation method thereof.The neural microelectrode comprises a first flexible substrate layer, a drug-loaded slow-release layer, a second flexible substrate layer, a conductive layer and an insulating covering layer, and the drug-loaded slow-release layer contains chitosan microspheres embedded with drugs; the medicament comprises nerve growth factors and / or anti-inflammatory drugs, a plurality of drug release holes are distributed in the insulating covering layer, an electrode contact is arranged at one end of the conducting layer, a lead connector is electrically arranged at the other end of the conducting layer, and openings for exposing the electrode contact and the lead connector are correspondingly formed in the two ends of the insulating covering layer respectively. According to the neural microelectrode provided by the invention, the drug-loaded slow-release layer is integrated in the neural microelectrode, so that a space for storing a drug does not need to be additionally processed on the membrane layer, and the drug does not need to be additionally loaded, so that the production and processing are relatively convenient and rapid; after the neural microelectrode is implanted into a corresponding tissue in a body, the drug-loaded sustained-release layer can be gradually degraded to slowly release a medicament for repairing nervous tissues or avoiding rejection reaction in a long-acting manner.

The invention provides a secondary battery, a power utilization device and a binder, the secondary battery comprises a positive pole piece, a negative pole piece and an isolating membrane, the negative pole piece comprises a negative current collector and a negative membrane layer arranged on at least one surface of the negative current collector; the negative electrode film layer comprises a negative electrode active material and a first binder; the mass ratio of the negative electrode active material in the negative electrode film layer is 96%-98.4%; the mass ratio of the first binder in the negative electrode film layer is 0.5%-3%; the first binder includes a polymer including-COOM,-CONH2,-CN, and-COOR, where M includes an alkali metal, and R includes a substituted or unsubstituted C1-C20 alkyl group. The secondary battery in the present application has improved energy density and does not deteriorate processability.

The application relates to the technical field of batteries, in particular to a composite solid electrolyte membrane and a preparation method and application thereof. The composite solid electrolyte membrane comprises the following layers which are sequentially stacked: a first membrane layer comprising a polymer, a solid electrolyte and a lithium salt; a second membrane layer comprising a polymer, a solid electrolyte and a lithium salt; and a third membrane layer which is an interface layer; wherein the solid electrolyte and the lithium salt content of the second membrane layer are higher than those of the first membrane layer, and the polymer is formed by polymerization of raw materials comprising triacetyl cellulose (TCA) and polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP). The composite solid electrolyte membrane has improved high-temperature resistance and good ion transmission performance.

The present disclosure refers to an in vivo analyte sensor, comprising: a substrate (20); a conductive layer (21) disposed over at least a portion of the substrate (20); a sensing layer (24) disposed formed on the conductive layer (21), wherein the sensin\g layer (24) forms a sensing area configured to generate one or more signals identifying a monitored analyte level after insertion of the analyte sensor and when maintained in fluid contact with interstitial fluid; and a membrane layer (25) formed at least on the sensing layer (24). The sensing layer (24) is formed with an area sensitivity of 0,2 to 1,5 nA / (mqx / dL) mm2 within the sensing area. Further, a method of manufacturing an in vivo analyte sensor is provided.

The invention provides a method and device for reducing coating defects of a disc-type ceramic membrane, and the method comprises the following steps: positively mounting a clamp on a spraying station, enabling the ceramic membrane to dynamically rotate, and cleaning and activating the front surface of the ceramic membrane by adopting a low-temperature plasma technology; carrying out negative pressure suction on the ceramic membrane while the ceramic membrane is dynamically rotated, and spraying a membrane preparation liquid on the front surface of the ceramic membrane by adopting ultrasonic atomization; and dynamically rotating the ceramic membrane, and performing negative pressure suction on the ceramic membrane, so that the circular arc part of the ceramic membrane is dynamically dip-coated in the membrane preparation liquid. According to the method, dynamic rotation of the ceramic membrane, negative pressure and ultrasonic spraying are cooperated, ultrasonic atomized liquid drops are sucked into a micropore structure or surface gaps when making contact with the surface of the ceramic membrane, pinholes or defects of the membrane layer are avoided, and the uniform, dense and defect-free membrane layer is formed; and non-contact with the ceramic membrane can be realized, and the coating defect caused by improper contact before the membrane layer is dried is effectively prevented.

The invention discloses a plugging particle, a preparation method, application and a grouting material, the plugging particle is of a core-shell structure and comprises a force-bearing inner core, the force-bearing inner core is coated with an expansion functional layer, and the expansion functional layer is coated with a delayed hydrogel outer film layer; wherein the inner core is made of one or more of quartz sand, kaolin and inorganic fibers; the expansion functional layer comprises modified bentonite and a super absorbent polymer; the delayed hydrogel outer film layer comprises a water-soluble film; the particle size of the blocking particles is 0.5 to 2.5 mm; through material structure optimization and response mechanism design of the functional plugging particles and the special grouting liquid, the automatic plugging function in the grouting process without mechanical triggering, a chemical expanding agent and a complex plugging device is achieved; and the method is suitable for scenes with high requirements on plugging precision, construction efficiency and structural stability in complex rock mass crack grouting engineering.

The present invention discloses a method for detecting cyclical gas injection within a double-membrane structure within an underground rock cavern gas storage cavity. The method comprises the following steps: 1. constructing the double-membrane structure on the surrounding rock mass; 2. detecting gas injection between the inner and outer membrane layers; and 3. injecting and detecting compressed air within the cavity. The present invention detects the cyclical gas injection and degassing within the double-membrane structure, minimizing damage to the double-membrane structure and thereby improving the durability and safety of the double-membrane sealing structure.

The invention relates to the technical field of pipeline repairing devices, in particular to a pipeline trenchless repairing device and process based on CIPP. The repairing device comprises a repairing assembly which is of a hollow structure and used for repairing the sealing performance of the deeply-buried underground pipeline, sealing covers used for keeping the sealing performance of the repairing assembly are arranged at the two ends of the repairing assembly correspondingly, communicating assemblies are inserted into the portions, in the two sealing covers, of the two ends of the repairing assembly correspondingly, and the sealing covers penetrate through the interior and the exterior of the repairing assembly; the hot water injection device is used for injecting hot water into a cavity of the repairing assembly; after the forked pipe inflates the pressure-bearing cavity, the pressure-bearing plate located near the air outlet of the forked pipe is driven by air pressure to drive the anti-skid plate to slide in the radial centrifugal direction of the inner film layer, so that the anti-skid plate easily slides out of the limiting groove, and during the period, the spring deforms to store elastic potential energy; and the anti-skid plate pushes the inner wall of the inner film layer to fix the outer wall of the outer film layer in the to-be-repaired pipeline, so that the air bag cloth is prevented from axially deviating after the inner film layer is filled with hot water.

The invention relates to a metal reinforced polytetrafluoroethylene film which comprises a first film layer, a second film layer and a metal support, the metal support is located between the first film layer and the second film layer, and the first film layer and the second film layer wrap the metal support; the first film layer and the second film layer are respectively and independently selected from micro-stretching expanded polytetrafluoroethylene with the stretching amplitude of about 20%-100%, and the micro-stretching expanded polytetrafluoroethylene has a microporous structure; the formed metal reinforced polytetrafluoroethylene film is provided with micropores of which the overall average aperture is about 0.03-0.50 [mu] m; and the material of the metal bracket comprises implantable metal.

The invention provides a biocompatible membrane which is prepared from a membrane layer working solution through a membrane forming process, the membrane layer working solution comprises amphiphilic polyurethane, and the amphiphilic polyurethane is prepared by any one of the following methods: hydrophilic molecules and hydrophobic molecules form an amphiphilic polymer through chemical bonding, the amphiphilic polymer and an isocyanate substance are subjected to an addition polymerization reaction to prepare the polyurethane resin. Or one of hydrophilic molecules or hydrophobic molecules and isocyanate substances are subjected to an addition polymerization reaction to prepare polyurethane, and then the polyurethane and the other molecule are subjected to chemical bonding to form the amphiphilic polyurethane. The invention also provides a preparation method of the biocompatible membrane and an analyte sensor using the biocompatible membrane. The biocompatible membrane provided by the invention can simultaneously control the permeation ratio of two analytes, when the biocompatible membrane is used as an outer membrane of an analyte sensor, only one layer of biocompatible membrane is needed to meet the monitoring requirement, and the detection accuracy can be ensured.

The invention discloses a ceramic nanofiber membrane and preparation thereof, a catalytic ceramic nanofiber membrane and preparation and application thereof. The preparation method of the ceramic nanofiber membrane comprises the following steps: (1) cleaning a particle accumulation state ceramic membrane support body; (2) spraying the mullite fiber membrane layer slurry on one surface of a supporting body for multiple times by using a spraying method, after each spraying, applying negative pressure to a membrane for a preset time, then drying, and after the last drying, forming a spraying layer on one surface of the supporting body; and (3) sintering the obtained membrane at high temperature to obtain the ceramic nanofiber membrane which is provided with a support body and a mullite fiber membrane layer which is stably attached to one surface of the support body and is of a net-shaped structure formed by staggering and stacking mullite fibers. The catalytic ceramic nanofiber membrane comprises a ceramic nanofiber membrane and a catalyst loaded on the surface of the ceramic nanofiber membrane and in membrane holes. The ceramic nanofiber membrane provided by the invention has the advantages of high porosity, high mechanical strength, high membrane flux and the like, and is beneficial to subsequent catalyst loading and application in water treatment.

The invention provides a microchip model for microbial visual fermentation and an application of the microchip model. The chip comprises a ventilation layer, a semi-permeable membrane layer and a culture layer, a gas micro-channel and a gas chamber are arranged on the lower surface of the ventilation layer and are used for providing a gas environment required by microbial fermentation; the culture layer comprises a liquid microchannel and a culture chamber and is used for microorganism culture; the two layers are separated by a semipermeable membrane. The ventilation layer and the semi-permeable membrane layer are arranged above the culture layer to provide a suitable gas environment for microorganisms, meanwhile, the culture chamber is connected with the micro-pressure device to provide sufficient nutrient substances for the microorganisms, and the culture layer is provided with the transparent thin bottom to achieve real-time monitoring of single cell behaviors and the fermentation product synthesis process. The problems that traditional sampling is large in destructiveness and fermentation cannot be monitored in real time are solved, and an efficient research tool is provided for research on the fermentation product synthesis mechanism and in-situ modification of the fermentation product.

The invention relates to a membrane material, in particular to a mixed matrix membrane with high filler loading capacity and a preparation method thereof. According to the invention, the MOF particle modification layer polymer and the film-forming polymer both adopt PIM-1, so that the interface energy is reduced, and the compatibility between the filler and the film layer is improved, thereby greatly increasing the filler loading capacity in the film-forming polymer.

The utility model belongs to the technical field of testing, and particularly relates to a seed coating agent film layer strength testing machine which comprises a machine body, a machine table, two supporting columns, a top plate, a hydraulic cylinder, a connecting plate, a testing disc and a testing pressing head, the machine table is fixed to the top of the machine body, the bottoms of the two supporting columns are fixed to the two sides of the machine table, the top plate is connected with the supporting columns, and the hydraulic cylinder is connected with the testing disc. The hydraulic cylinder is fixed at the bottom of the top plate, the telescopic end of the hydraulic cylinder is connected with the connecting plate, the test pressure head is fixed at the bottom of the connecting plate, a plurality of electric push rods are mounted at the bottom of the test pressure head, the bottom of each electric push rod is connected with a test pressure plate, and a sensor is arranged at the bottom of each test pressure plate. According to the utility model, each seed coating agent on the supporting groove can be pressed and tested by the test pressure head, so that the test effect of the test machine on a seed coating agent film layer is improved, and the deviation of the strength test result of the seed coating agent caused by non-uniform stress of the seed coating agent due to the size difference of the seed coating agent is prevented.

The invention provides a membrane electrode and a preparation method thereof. The preparation method of the membrane electrode comprises the following steps: providing a membrane layer; forming an electrode catalyst layer on the surface of the film layer; carrying out catalyst pore-forming treatment on the electrode catalyst; wherein the pore size of the pore channel of the electrode catalyst is 1-200 [mu] m. According to the membrane electrode and the preparation method thereof provided by the invention, the safety of a water electrolysis device can be improved, the electrolysis efficiency is improved, the uniformity and stability of catalysis are ensured, and the service life of the water electrolysis device is prolonged.

This document describes systems and methods for treating and recovering water from feed solutions using a multilayer module with an expansion chamber. The multilayer module comprises a feed spacer layer, a permeate spacer layer and a membrane layer, wherein water vapor evaporated from the feed solution in the feed spacer passes through the membrane layer into the permeate spacer layer. The expansion chamber receives the water vapor from the permeate spacer layer and the feed solution from the feed spacer layer.

The invention provides a connecting process of a metal ceramic membrane component, which comprises the following steps: uniformly coating the outer surface of a porous ceramic tube with a coating liquid prepared from ceramic powder and metal powder to obtain a porous ceramic tube with a metal ceramic coating; putting the porous ceramic tube into a mold, forming a plugging clamping groove in one end of the mold, forming a cavity among the outer wall of the porous ceramic tube, the plugging clamping groove and the mold, filling metal powder into the cavity, and arranging a plugging fixing piece at the other end of the mold, and finally, the obtained metal ceramic assembly blank is subjected to high-temperature sintering, and the metal ceramic membrane assembly can be prepared. According to the invention, effective combination of the metal film layer and the ceramic film layer is realized through a co-firing technology by utilizing a mold forming and surface modification process. The prepared metal ceramic membrane assembly can be directly connected with a device in a welded mode in the using process, the membrane layer precision is high, the thermal shock resistance is good, and the metal ceramic membrane assembly is suitable for high-temperature, high-pressure, high-viscosity and other severe systems in the petrochemical industry field.

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

This invention discloses a startup method for an AnDMBR dynamic membrane for sludge anaerobic digestion. During the startup phase, by adjusting the solids retention time, hydraulic retention time, biogas circulation intensity, and membrane flux in the membrane zone, the sludge operating concentration is rapidly increased and the dynamic membrane layer is rapidly formed, so that the transmembrane pressure difference in the membrane zone reaches the expected value in a short time, thereby improving the production efficiency of the reactor.

A living wall system generally having a number of layers including a waterproof membrane layer for preventing water and moisture from seeping to the building structure or wall in which the living wall system is installed. Next, a number of growing medium layers are provided having a wicking fabric layer between them, the growing medium typically of felt. The wicking fabric layer ensures even watering and smooth capillary action. The front growing medium layer has plant pockets for holding plants.