266 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 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.

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 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.

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.

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).

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.

The invention provides a wound repair material, which takes one side close to a wound as an inner side, and comprises a thin film layer and a barrier layer from inside to outside in sequence, the barrier layer is a semi-permeable membrane layer allowing gas to permeate through; the thin film layer comprises an inner side face used for making contact with the wound surface and an outer side face combined with the barrier layer. An adhesion structure is arranged on the inner side surface of the thin film layer, and the adhesion structure is configured to be adhered and combined with a wound surface. The invention provides a wound repair material which can solve the problems that in the prior art, the wound repair material and a wound are poor in fitting performance, and due to insufficient adhesion, a product is prone to falling off and shifting.

One embodiment of the present invention relates to a composite semi-permeable membrane comprising: a porous support layer; a separation function layer that is provided on the porous support layer and that contains a polyamide; and a coating layer provided on the separation function layer. The coating layer contains a copolymer of a hydrophilic unit having a hydrogen bond acceptor with a polarization degree of from 0.70 e to 1.00 e.

This invention relates to the field of drilling and completion fluid semi-permeable membrane testing technology, specifically a drilling and completion fluid semi-permeable membrane testing device. The device includes a base plate, a vertical plate fixedly connected to the top surface of the base plate, an upstream chamber fixedly connected to the front surface of the vertical plate via a connecting plate, a downstream chamber and an injection cylinder fixedly connected to the top surface of the base plate, and a core holding chamber integrally connected to the top surface of the downstream chamber. The inner bottom surface of the core holding chamber has a through hole. This drilling and completion fluid semi-permeable membrane testing device provides active fixation and circumferential sealing of the core, preventing fluid migration or core displacement under high pressure. It also simulates the high-temperature and high-pressure environment downhole, improving the accuracy of drilling and completion fluid semi-permeable membrane testing.

The present application relates to a kind of composite piezoelectric negative pressure dressings and its preparation method, belong to medical dressing field.The present application includes: step S1: collagen is dissolved in acetic acid to obtain collagen solution, collagen sponge is obtained by freeze-drying process;Step S2: PVDF powder and ZnO nanoparticles are dissolved in organic solvent to obtain PVDF / ZnO solution;Step S3: the injector equipped with PVDF / ZnO solution is placed in electrospinning machine, collagen sponge is fixed on the collection wheel of electrospinning machine, and PVDF / ZnO nanofiber is covered on collagen sponge to form composite piezoelectric dressing by electrospinning method;Step S4: semipermeable membrane is covered on the top layer of composite piezoelectric dressing, while connecting drainage tube, forming negative pressure system, to obtain composite piezoelectric negative pressure dressing.The present application has good biocompatibility.Nanofiber membrane is more sensitive, and controllable negative pressure intensity makes it have excellent stability, and piezoelectric performance is more excellent.

The utility model relates to the technical field of wastewater treatment equipment, in particular to electroplating wastewater treatment equipment which comprises a cage lifting grating, an adjusting box, a cyanide breaking reaction tank and a comprehensive adjusting tank, a lifting cage grating is placed on the inner wall of the adjusting box through a hook, one side of the adjusting box is connected with a cyanide breaking reaction tank through a water pump and a water pipe, and one side of the cyanide breaking reaction tank is connected with a comprehensive adjusting tank through a water pump and a water pipe. According to the electroplating wastewater treatment equipment, it is ensured that the SDI value can meet the water inlet requirement of the DTRO filter through the multi-medium filter, a reducing agent and an antisludging agent are added into the pipeline mixer, it is ensured that no residual chlorine enters the DTRO filter, it is ensured that no particulate matter larger than 5 micrometers enters the DTRO filter through the security filter, wastewater is fed into the DTRO filter through the plunger pump, and COD, COD and the DTRO filter are subjected to chemical vapor deposition. Pollutants such as heavy metals are separated and removed under the action of the semipermeable membrane, so that the electroplating wastewater treatment equipment performs automatic treatment.

The application provides a method for preparing FFPE quality control products by using cell lines, a reference product and a kit, and belongs to the fields of medicine, clinical laboratory science and biotechnology, and comprises the following steps: culturing cell lines by using microcarriers; mixing different cell lines based on requirements; centrifuging the mixed cell microcarrier suspension in a sealed malt pipe at one end; removing supernatant after the treatment; packaging the two ends of the malt pipe by using a semi-permeable membrane; removing the semi-permeable membrane after fixing, dehydrating and transparentizing the malt pipe by using a formaldehyde solution; separating the cell microcarriers after the wax immersion treatment from the malt pipe; and embedding the cell microcarriers into a paraffin block by using wax. The quality control product can be used in subsequent quality control processes, the mutation frequency of the quality control product can be kept in good uniformity, and batch production and large-scale production of the quality control product can be realized.

The utility model discloses a colloid osmotic pressure tester which comprises a shell, and a semi-permeable membrane replacement mechanism, a machine body auxiliary module and a controller which are arranged in the shell, the semi-permeable membrane replacement mechanism is detachably connected with a semi-permeable membrane fixing device and a reagent bag, and a semi-permeable membrane is arranged in the semi-permeable membrane fixing device; the controller is in communication connection with the semi-permeable membrane replacement mechanism and the machine body auxiliary module, and the machine body auxiliary module is used for inputting and outputting information, controlling the semi-permeable membrane replacement mechanism to drive the semi-permeable membrane fixing device and the reagent bag to automatically pop up, and adding a sample into the semi-permeable membrane fixing device for osmotic pressure measurement. The semi-permeable membrane replacing mechanism drives the semi-permeable membrane fixing device to turn over, so that the semi-permeable membrane fixing device is convenient to replace, the internal semi-permeable membrane is further replaced, the reagent bag is rapidly replaced, the mounting process is simplified, automatic control is realized, and the working efficiency is improved.