378 results about "Semipermeable membranes" patented technology

The invention discloses a vacuum-assisted pultrusion preforming device for a composite material. The vacuum-assisted pultrusion preforming device comprises a yarn threading plate, a gum dipping tank, a gum extruding roller and a vacuum-assisted preforming mold which are sequentially arranged in the pultrusion direction, wherein fiber bundles penetrate through the yarn threading plate in a layered mode, the gum dipping tank is used for containing resin, and the gum extruding roller is used for extruding redundant resin. The vacuum auxiliary preforming mold is provided with a preforming mold cavity, a vacuum cavity is formed in one section of the preforming mold cavity of the vacuum auxiliary preforming mold, an air exhaust hole is formed in the upper portion of the vacuum cavity, and a semi-permeable membrane allowing gas to pass through but blocking resin to pass through is arranged at the air exhaust hole. And the air exhaust hole is externally connected with a vacuumizing device. The vacuum-assisted pultrusion preforming device can effectively discharge microbubbles in resin and fiber bundles, effectively control uniform distribution of the content of the resin and remarkably promote full infiltration of high-viscosity resin to fibers.

The invention discloses a seawater desalination treatment system and method based on a penetration method, and particularly relates to the technical field of seawater desalination treatment.The seawater desalination treatment system is provided with an online monitoring module, and various indexes in the seawater desalination treatment process are monitored through a multi-source sensor; a seawater pollution treatment module is arranged to remove suspended particles and pollutants in seawater; a seawater desalination treatment module is arranged for deep desalination; setting an equipment management module to judge whether equipment maintenance is needed or not based on the real-time operation data of the equipment; a semi-permeable membrane loss prediction module is arranged for semi-permeable membrane loss prediction; setting a semi-permeable membrane maintenance control module to automatically match a corresponding maintenance strategy according to the predicted membrane loss degree; a forward osmosis and reverse osmosis coupling process is combined, so that the desalination rate and the energy consumption efficiency ratio are improved, and the service life of the semipermeable membrane is effectively prolonged; an intelligent monitoring-prediction-control system is constructed, and the stability and reliability of the technological process are guaranteed.

The utility model relates to a gas-liquid separator suitable for different flight attitude angles, which comprises a gas-liquid separator shell, an inlet is arranged at the upper part of the side surface of the gas-liquid separator shell, the inlet is sequentially connected with an inlet section and an inlet reducing section, and a liquid outlet is arranged at the lower part of the side surface of the gas-liquid separator shell; a conical support is arranged in the gas-liquid separator shell and fixedly connected with the bottom of the gas-liquid separator shell. The outer side surface of the conical bracket is covered with a semi-permeable membrane; a gas outlet is formed in the bottom of the gas-liquid separator shell and corresponds to the bottom of the conical support. According to the gas-liquid separator, the internal structure and the flow channel arrangement mode of the separator are optimized and improved by deeply analyzing the influence mechanism of the flight attitude angle change on the gas-liquid two-phase flow behavior and the separation effect, so that the high-efficiency gas-liquid separation efficiency can be kept no matter which attitude angle the aircraft is located, and the gas-liquid separation efficiency is improved. And the separation instability caused by the change of the flight attitude is effectively reduced.

The invention belongs to the technical field of semipermeable membrane preparation, and particularly relates to a preparation method of a nanofiltration membrane. The preparation method comprises the following steps: (1) cleaning the supporting layer for later use; the preparation method comprises the following steps: blending diamine, an amino beta-cyclodextrin derivative, an inorganic hybridizing agent, a zwitterionic compound and water to obtain a water phase for later use; blending aromatic acyl chloride, a cosolvent and an organic solvent to obtain an oil phase for later use; and (2) sequentially carrying out primary impregnation in a water phase, membrane scraping, secondary impregnation in an oil phase and heating curing on the supporting layer, and finally carrying out post-treatment to obtain the nanofiltration membrane. The nanofiltration membrane is prepared by introducing the amino beta-cyclodextrin derivative, the inorganic hybridization agent and other components into polyamide, so that the water flux of the polyamide nanofiltration membrane and the capability of effectively separating ions with different valence states are further improved.

An osmotic bandage for treating wounds, such as cuts, abrasions, minor burns, blisters, and post-surgical incisions. The bandage includes a bandage strip with an adhesive along with a plurality of apertures or airholes disposed therethrough for breathability. The bandage further includes a multi-layered gauze pad. The multi-layered gauze pad includes a first layer, a second salt laced layer, and a third odor-reducing layer. The salt is a natural bactericide, through the dehydration of water in bacteria, and kills any bacteria that attempt to invade or enter the wound site. A semi-permeable membrane cover may be disposed in overlying relation to the pad to prevent the salt from being in direct contact with the wound tissue and causing the patient pain.

Forward osmosis membrane vessels, and particularly stackable forward osmosis membrane vessels, are provided as well as systems and methods thereof. The forward osmosis membrane vessel has a body, a strong draw solution chamber, a first and a second semipermeable membrane, and a brine chamber. The first and second semipermeable membranes each are disposed within the cavity of the body. The first and second semipermeable membranes are configured to produce diluted draw solution streams and brine streams. The brine chamber is disposed at least partially between the first semipermeable membrane and the second semipermeable membrane. The forward osmosis membrane vessel may be configured such that in a stacked configuration the brine chamber and the strong draw solution chamber of the forward osmosis membrane vessel aligns with a brine chamber and a strong draw solution chamber of an adjacent second forward osmosis membrane vessel.

The invention relates to an automatic peritoneal dialysis machine auxiliary system capable of preventing peritoneal protein from being lost, and belongs to the technical field of peritoneal dialysis. By arranging the auxiliary system comprising a hollow fiber membrane filter, peritoneal drainage liquid is guided into the hollow fiber membrane filter in the drainage stage; the protein is intercepted by utilizing the semi-permeable membrane characteristic, and small molecule metabolic wastes penetrate through the semi-permeable membrane characteristic to form a filtrate rich in the protein; and then the feedback pump speed is dynamically adjusted through a control system based on a signal of a flow sensor, so that the feedback process of the protein liquid is stably synchronized with drainage, liquid injection and staying stages of the automatic peritoneal dialysis machine, online recovery and safe feedback of protein are realized, and the problem that the protein liquid flows back to the treatment cycle of the automatic peritoneal dialysis machine is solved on the premise that the treatment cycle is coordinated with the treatment cycle of the automatic peritoneal dialysis machine. Protein in peritoneal drainage liquid is continuously and selectively recovered and safely returned, so that the problem of protein trophism loss of long-term peritoneal dialysis patients is directly reduced.

The utility model discloses a multi-element organic matter mixed film-coating aerobic composting device, which belongs to the field of composting and comprises a fermentation box, a liquid collecting box communicated with the fermentation box is arranged at the bottom of the fermentation box, a filter screen is arranged at the top of the liquid collecting box, a semi-permeable film covers the top of the fermentation box, a pressure pump is arranged outside the liquid collecting box, and the liquid collecting box is communicated with the semi-permeable film. A spraying mechanism capable of adjusting the spraying angle and the spraying distance is arranged at the top of the fermentation box, the pressure pump feeds penetrating fluid in the liquid collecting box into the spraying mechanism through a connecting pipe, and a ventilation mechanism is arranged on the fermentation box. The water spraying device can ensure that water is uniformly and accurately sprayed on the surface of a compost material, the situation that water in some areas is too much and water in other areas is too dry is avoided, the utilization efficiency of the water is improved, and the spraying density can be adjusted according to the characteristics of specific materials so as to meet the requirement of the materials for the water in the composting process.

The invention discloses a peritoneal dialysis system which comprises an abdominal cavity pipeline with the first end communicated with the abdominal cavity of a human body; the semi-permeable membrane assembly comprises a membrane, a first side and a second side, the first side and the second side are separated by the membrane, and the first side is communicated with the second end of the abdominal cavity pipeline so as to receive the abdominal cavity dialysate from the abdominal cavity pipeline and inject the abdominal cavity dialysate into the abdominal cavity of the human body; the external liquid path system comprises an external liquid pipeline communicated with the second side, and the external liquid pipeline comprises a waste liquid outlet for outputting dialysis waste liquid led out from the peritoneal dialysis liquid through the membrane; when the peritoneal dialysis solution is led out, the membrane allows moisture and small molecular solutes in the peritoneal dialysis solution to permeate into the second side and entraps a macromolecular penetrant on the first side so as to maintain the osmotic pressure of the peritoneal dialysis solution.

The invention discloses a three-dimensional electric field vector detection and microdialysis synchronous sampling implanted probe system, and belongs to the technical field of neural electrophysiology detection. The system comprises a vector electric field detection module (containing multiple layers of platinum-iridium alloy contacts) and a microdialysis module (provided with a semi-permeable membrane window with high selectivity and biological compatibility) which are coaxially integrated, and spatial isolation and synchronous acquisition of electro-chemical signals are realized through an insulating support structure. The problems of separation and spatial dislocation of an electric field detection and biochemical sampling system in the prior art are solved, real-time association of three-dimensional electric field vector reconstruction and neurotransmitter analysis is supported, and accurate electro-chemical coupling data is provided for nerve regulation and control research.

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 utility model relates to energy equipment technical field discloses a kind of dynamic ice systems of ice blocking prevention and maintaining outlet temperature, including ice storage tank, ice storage tank inner wall is sequentially fixedly connected with ice slurry conveying branch pipe, stirring rod, semi-permeable membrane from top to bottom, the top of the ice slurry conveying branch pipe is fixedly connected with multiple ice slurry conveying spout, ice storage tank one side inside is fixedly connected with gas pipe, the one end of gas pipe is fixedly connected with air pump, air pump is located the outer side wall of ice storage tank, air pump outer wall is fixedly connected with air suction pipe and transmission shaft, the one side electric connection of air pump has monitoring line one, the one end electric connection of monitoring line one has monitoring device.In the utility model, ice crystal and water are completely separated by semi-permeable membrane, fine ice crystals entering the inlet of subcooling plate exchanger can be filtered out during ice storage, ice blocking in the plate exchanger is avoided, ice crystal filter is saved, the size of dynamic ice maker can be reduced, and the effects of preventing ice blocking and maintaining outlet temperature are achieved.

This invention discloses a multi-stage treatment method for photovoltaic fluoride-containing wastewater based on semi-permeable membrane separation and the semi-permeable membrane thereof. The multi-stage treatment method includes the following steps: S1, primary treatment; S2, secondary treatment; S3, tertiary treatment. This method first performs primary treatment on the initially high-impurity fluoride-containing wastewater, which can rapidly degrade organic matter and heavy metals in the wastewater. Then, secondary treatment removes most of the heavy metal ions from the wastewater. Crystallization can effectively remove dissolved salts from the wastewater, while electrodialysis can concentrate and recover metal ions from low-concentration wastewater and desalinate the wastewater. Finally, tertiary treatment efficiently separates fluoride ions from the wastewater, and reverse osmosis filtration further removes the remaining fluoride ions and other dissolved salts, ensuring effluent quality. The semi-permeable membrane is a modified polyethersulfone membrane, and water quality is further purified by adding microorganisms.

Provided is a composite semipermeable membrane having excellent friction resistance and good water permeability. This composite semipermeable membrane is provided with a support membrane, a separation function layer comprising a crosslinked polyamide, and a coating layer disposed on the separation function layer, the spread area ratio Sdr of the coating layer-side surface being 60-200%, and the static friction coefficient [mu] s of the coating layer-side surface with respect to a polishing membrane abrasive having a particle size # 2000 being 0.40-1.30.

The invention discloses an operation method for splitting an oral implant bone, which comprises the following steps of: preparing an ultrathin bone sheet of which the buccal side is less than 1mm, reserving physiological connection between periosteum and the bone sheet, and constructing a periosteum bone flap. The periosteum flap is of a natural barrier membrane structure, and integrates the function of a bone sheet rigid support and the semi-permeable membrane characteristic of the periosteum. The buccal ultrathin bone sheet is connected with the basal bone, is a rigid support structure, supports an osteogenesis space, and can provide bone marrow stroma cells to participate in bone defect repair. Physiological attachment of periosteum is not only a blood supply source of an inner side bone sheet, but also exerts the characteristics of a semi-permeable membrane, replaces an artificial barrier membrane to stop fiber tissue from growing in, and follows the PASS principle of the GBR technology, so that the operation risk is reduced, the use of the artificial barrier membrane is reduced, the adaptation disease of bone splitting is widened, the absorption of buccal side bones is reduced, and the bone splitting effect is improved. And the clinical effect of bone defect repair is improved.

A method of moderating concentration of at least highly fluorinated alkyl materials (e.g., molecules) from a contaminated aqueous feed liquid containing an original composition of between 5 parts / trillion and 3000 parts / billion of the at least highly fluorinated materials per liter of water into an aqueous electronic separator having multiple chambers including a feed chamber having a liquid exit port from which a mediated aqueous contaminated feed liquid exits and a liquid input port into which the contaminated aqueous feed liquid enters the feed chamber; an anodic electrode chamber filled with an aqueous anodic liquid; and a cathodic electrode chamber filled with an aqueous cathodic liquid; wherein the feed chamber is between and adjacent to the anodic electrode chamber and the cathodic electrode chamber and the feed chamber is separated from each of the anodic electrode chamber and the cathodic electrode chamber by at least one semipermeable membrane.

A semipermeable membrane comprises a sulfonated polyarylene ether copolymer and is sterilized with ethylene oxide gas. The sulfonated polyarylene ether copolymer includes a hydrophobic segment repeating unit represented by a formula (1) and a hydrophilic segment repeating unit represented by a formula (2) as copolymerization components.

The utility model relates to the technical field of micro-fluidic chips, and provides an organ-like culture chip which comprises a first substrate and a second substrate, and the first substrate and the second substrate are overlapped; the first substrate is provided with a first cavity, the first cavity is used for accommodating organoid cells, the second substrate is provided with a second cavity, the second cavity is communicated with the first cavity, and the second cavity is used for accommodating a cell culture medium; a liquid injection runner is arranged on the periphery of the second cavity and is used for flowing a detection medicine and a blood simulant, and a semi-permeable membrane is arranged between the liquid injection runner and the second cavity for substance exchange. According to the organoid culture chip, the liquid injection flow channel is arranged around the second cavity, and the semi-permeable membrane is arranged between the second cavity and the liquid injection flow channel, so that organoid cells and blood simulants can be subjected to material exchange through the semi-permeable membrane so as to simulate a blood brain barrier, and the application of the micro-fluidic chip in the aspect of brain-like organs is realized.

The present invention provides a lithium battery compression molding equipment and its process flow, including a cell feeding unit, a hot pressing and cooling unit, a high-voltage testing unit and a detection and discharge unit arranged in sequence, wherein the cells are transferred between the cells by an automatic transplanting and handling unit. The cell feeding unit includes a feeding part and a code reading part in sequence, the hot pressing and cooling unit includes a hot pressing engineering part and a cooling and pressurizing part in sequence, the high-voltage testing unit includes a semi-permeable membrane molding part, a bottom gluing part and a high-voltage testing part in sequence, and the detection and discharge unit includes an image detection part and a discharge part in sequence. The present invention is conducive to the automated completion of the fixing, visual inspection and heating processes on the slide base, and uses visual inspection to accurately locate the position of the lithium battery, thereby improving positioning accuracy, reducing the difficulty of work switching, and improving the qualified rate of finished products.

To provide a method and a device for collecting energy by nano unidirectional valve penetration.SOLUTION: The present invention includes technical principle and method for energy collection by penetration that is proposed on the basis of principal and penetration effect of a nano unidirectional valve. Two semi-permeable membranes 2-1 are provided, a solution 2-2 is filled, and the same is combined with a concentration control module 2-3, thereby controlling a concentration at a semi-permeable membrane boundary, differing solution concentrations in the vicinity of two semi-permeable membranes, realizing control of osmotic pressure, achieving effect of unidirectional valve action, rectifying disorder and high-speed thermal motion of solvent molecules to regular unidirectional flow automatically, forming potential energy of a liquid level or kinetic energy of liquid flow, and using the same for energy storage or power generation. The kinetic energy by thermal motion of molecules is extracted from environment to generate power, and electric energy is returned to environment after consumption thereof, and is used again for power generation.SELECTED DRAWING: Figure 3

A method for analyzing a membrane damage of a composite semipermeable membrane for analyzing an influence of the membrane damage generated in a separation function layer of the composite semipermeable membrane in a separation membrane element including: a step of acquiring a dyed image obtained by dyeing the composite semipermeable membrane or a fragment of the composite semipermeable membrane with a dyeing agent; and a step of collating the dyed image with a shape image of a supply side flow channel material, and, on the basis of the collation result, extracting from the dyed image a position where the membrane damage is generated on the separation function layer of the composite semipermeable membrane by the supply side flow channel material provided on the separation function layer side of the composite semipermeable membrane. The influence of the supply side flow channel material on the membrane damage of the separation function layer is calculated.

An oxygenerator (4) has a blood side (2), a gas side (6) and a semi-permeable membrane (8), where the membrane (8) separates the blood side (2) from the gas side (6), the blood side (2) has an inlet (18) and an outlet (20), the gas side (6) has an inlet (14) and an outlet (16), and during operation of the oxygenerator (4), the gas side (6) has an inlet (14) and an outlet (16). A flow of gas flows into the inlet (14) to the outlet (16) at a gas flow rate and a flow of blood flows into the inlet (18) to the outlet (20) at a blood flow rate, where gas flowing into the inlet (14) of the gas side (6) and blood flowing into the inlet (18) of the blood side (2) flow along the membrane (8) in the same direction to their respective outlets (16, 20).

The purpose of the present invention is to provide a dialysis membrane capable of removing CPPs while suppressing a reduction in minerals and capable of being suitably used for blood processing including the adsorption of CPPs. The present invention pertains to a dialysis membrane comprising a hollow fiber membrane or a semipermeable membrane which is a flat membrane, wherein said dialysis membrane is used for blood processing including the adsorption of calciprotein particles which are complexes of calcium phosphate and proteins, and has a compound (A) in which a film-forming polymer constituting the semipermeable membrane has, in a portion other than terminals of a main chain, at least one electron-donating group selected from the group consisting of an amino group, a carboxy group, a phosphoric acid group, a phosphono group, a phosphino group, and a thiol group, and / or has, separately from the semipermeable membrane, at least one electron-donating group selected from the group consisting of an amino group, a carboxy group, a phosphoric acid group, a phosphono group, a phosphino group, and a thiol group.

A method for operating an electrochemical stack (10) comprising a plurality of electrochemical cells (1), each cell having an anode compartment (2) with an anode electrode (6) and a cathode compartment (3) with a cathode electrode (7), wherein the anode compartment (2) and the cathode compartment (3) are separated from each other by a semipermeable membrane (8). An electrical voltage is present between the anode electrode (6) and the cathode electrode (7) during operation, with the electrochemical cells (1) being connected in series. A cell voltage monitoring unit (17) is connected to the electrochemical cells (1). The method is characterized by - Measuring electrical voltages U i using the cell voltage monitoring system (17) of n electrochemical cells connected in series, where n is greater than or equal to 2, - Comparing the measured voltages U i with a maximum voltage U exp,nand a minimum voltage U min,n , where the maximum voltage U exp,n n times the maximum possible cell voltage of a single electrochemical cell U exp is and U min,n the (n-1) times the maximum possible cell voltage of a single cell (1) plus a lower voltage limit U Limit , where U Limit the smallest cell voltage down to which operation of a single electrochemical cell (1) is to be carried out, - Output an error message if at least one of the measured voltages U i smaller than U min,n or larger than U exp,n is.

An electrochemical system with an electrochemical stack (1) comprising a first reaction chamber (2) and a second reaction chamber (3), separated by a semipermeable barrier (4), between which an electrical potential difference can be applied. At least one of the reaction chambers (2; 3) is filled with water during operation and connected to a drain line (10) through which water or the aqueous solution can flow out. The inner surface (110) of the drain line (10) is hydrophilized and has a wetting angle (α) of 0° to 90°.

An embodiment relates to a system comprising a fluid chamber containing a fluid; an Active Wearable Medical Device (AWMD) comprising a permeability module configured to allow ingress of fluid from the fluid chamber to an osmotic agent chamber via a semi-permeable membrane to generate osmotic pressure; a piston that moves longitudinally in response to the osmotic pressure; a drug chamber comprising a drug and a valve module configured to enable one-way drug flow from the chamber to outside the AWMD; a sensor module to measure piston displacement and provide real-time data; and an electronic module configured to regulate drug ejection based on the displacement data, ensuring dose-to-dose volume variation remains within ±25%. A machine learning model triggers alerts if dosing deviates from threshold limits. A channel is fluidically coupled to the AWMD and delivers the drug to the subject. The AWMD is externally worn and not implanted.

The invention relates to a biological self-cleaning semipermeable membrane as well as preparation and application thereof. Specifically, the invention discloses a biological self-cleaning semipermeable membrane, and the semipermeable membrane still has excellent permselectivity after being placed in tissue fluid for a long time. The invention also discloses preparation and application of the semipermeable membrane.

The invention provides a protective clothing fabric for water area rescue. The protective clothing fabric is composed of a surface layer, a heat preservation and moisture absorption layer, a semi-permeable membrane layer and an inner layer which are sequentially laminated and bonded through hot melt adhesive and have sealed end edges, wherein the surface layer is a liquid water barrier formed by polyamide base cloth and a waterproof coating coated on the surface of the polyamide base cloth; the heat-preservation moisture-absorption layer is formed by weaving polyester hollow fibers and polyacrylate fibers spirally wound on the periphery of the polyester hollow fibers, and moisture-absorption particles are loaded on the outer surfaces of the fibers; the semi-permeable membrane layer adopts a microporous polytetrafluoroethylene membrane which is arranged in a gradient manner; the inner layer is formed by blending bamboo charcoal fibers and polyacrylate fibers, and the moisture absorption efficiency of the heat preservation and moisture absorption layer is higher than that of the inner layer. The fabric realizes balance of water resistance and moisture permeability and synergism of heat preservation and moisture absorption, has the advantages of light weight, movement flexibility, durability and comfort, and remarkably improves the operation efficiency of water area rescue protective clothing.

The utility model relates to the technical field of test and measurement, and discloses a semi-permeable membrane sample gas selector for greenhouse gas on-line monitoring, which comprises a low-temperature cold trap device and an eight-port gas rotary valve, the low-temperature cold trap device comprises a low-temperature cold trap body, a plurality of gas sample inlets are arranged at the rear end of a shell of the low-temperature cold trap device, and the eight-port gas rotary valve is arranged in the shell of the low-temperature cold trap device. A plurality of input interfaces and output interfaces are arranged on the eight-port gas rotary valve, the plurality of input interfaces can be communicated with the plurality of gas sample injection ports one by one through guide pipes, and a filter is arranged at one end, far away from the eight-port gas rotary valve, of each guide pipe. According to the semi-permeable membrane sample gas selector provided by the utility model, except for the semi-permeable membrane tube of a finished product assembly, the used conduits all adopt 1 / 8 inch silanization stainless steel tubes, so that the gas replacement speed in structures such as a low-temperature cold trap body and an eight-port gas rotary valve is increased, the gas adsorption is reduced, and the quick response of gas output is realized.

A system for crystallising a selected mineral from brine is described. The system includes a forward osmosis (FO) system and the FO system comprises: a semipermeable membrane comprising a material having a surface tension less than 50% of a surface tension of the selected mineral in crystalised form, the membrane being positioned substantially vertically providing fluid communication between a brine chamber holding the brine and a draw solution chamber holding a draw solution; and a crystal collector provided at the lowest edge of the substantially vertically positioned semipermeable membrane, the crystal collector being arranged to collect crystals of the selected mineral formed on the membrane which have fallen due to gravity.