54 results about "Membrane rupture" patented technology

The invention discloses a preparation method of an irradiation cross-linking polyethylene porous diaphragm. According to the method, the polyethylene porous diaphragm is soaked in and adsorbs a volatile solvent containing initiator and cross-linking agent to lead initiator and cross-linking agent into the surface and the interior of the polyethylene porous diaphragm, and is then treated with irradiation cross-linking underwater or under the protection of inert gas, and a locally cross-linked diaphragm is obtained by controlling the cross-linking condition. The irradiation cross-linking lithium-ion battery diaphragm has the advantages that the tensile strength and the hydrophily are greatly improved; the high-temperature hot-shrinkage rate is greatly reduced; the defect of low membrane rupture temperature is overcome; the membrane rupture temperature is greatly raised while the normal hole closing of the diaphragm is guaranteed; the hole closing temperature of the diaphragm is 120 to 140 DEG C; the membrane rupture temperature is raised to be higher than 160 DEG C.

The invention discloses a small two-stage light-gas gun and relates to a light-gas gun. The small two-stage light-gas gun comprises a cylinder barrel, a pressure transmitting tube, a pressing column, a launching tube, a piston handle, a pressure transmitting body, a membrane, a membrane rupturing device, a first sealing ring, a metal sealing ring, a support and a plurality of supporting seats; a piston on the piston handle is in sliding contact with the inner circumferential surface of a gas chamber; one end of the pressure transmitting tube is connected with a gas port in a threaded manner, and the pressure transmitting tube is hermetically connected with the pressing column; the pressure transmitting body is mounted in the pressure transmitting tube; the first sealing ring and the metal sealing ring are mounted in a mounting groove from the inside to the outside, the membrane is hermetically connected with the membrane rupturing device, and the membrane rupturing device is hermetically connected with the launching tube; the cylinder barrel is mounted on the support, and the pressure transmitting tube and the launching tube are respectively detachably connected onto the supporting seats. The small two-stage light-gas gun has the advantages that problems that an existing light-gas gun is driven by gunpowder at a primary stage, accordingly, environments are polluted, occupied space is large, sealing cannot be carried out in a membrane rupturing procedure implemented by the aid of high-pressure gas and the bullet launching speed cannot be increased are solved, and the small two-stage light-gas gun is used in fields of spacecrafts or research on material performance and the like.

The invention provides a full-automatic luminescent immunoassay system based on a micronano-magnetic bead electromagnetic transfer technique. The system includes a computer and a detection box. The detection box is a sealable lightproof box, and comprises a first motor, a second motor, a membrane rupture device, an electromagnetic stirring rod, a Teflon coating or a disposable plastic jacket, immunomagnetic beads, a sample pool, a temperature control device, a photoelectric conversion device, a bottom reading light path, a waste consumable material recovery area or ultrasonic cleaning equipment, a reagent bin consumable material and a consumable material adapter, a guide rail and an electromagnet. The system provided by the invention is based on a magnetic bead transfer method, simplifies the detection steps, integrates the detection module, avoids a complex liquid path system, saves the detection time while realizing full automation and miniaturization of the immunodetection system, and also lowers the system cost at the same time.

The application discloses a composite battery diaphragm comprising a nonwoven fabric layer and a polyolefin microporous membrane layer which are combined and fixedly connected to form the composite battery diaphragm. According to the composite battery diaphragm disclosed by the application, the non-woven fabric layer serves as a support body and ensures the high-temperature heat resistance of the composite battery diaphragm; and the polyolefin microporous membrane layer ensures the low-temperature close property of the composite battery diaphragm. The excellent air permeability and thermal contraction and a high membrane rupture temperature of the composite battery diaphragm are ensured on the basis of not changing the original characteristics and properties of the polyolefin microporous membrane; the low-temperature close property and the high-temperature heat resistance of the battery diaphragm are effectively coordinated; and the non-woven fabric is low in cost, so that the cost of the production process of the composite battery diaphragm is low.

The invention discloses a preparation method of a multilayer ceramic composite membrane for improving the safety of a secondary battery. The preparation method comprises the following steps of: (1) sufficiently mixing first high molecular weight polyolefin, an antioxidant and low molecular weight organic matters in a double-screw extruder to form a sticky mixture as a core layer; (2) sufficiently mixing second high molecular weight polyolefin, an antioxidant and low molecular weight organic matters and a non-conductive nanometer inorganic ceramic material in another co-rotating double-screw extruder to form a sticky mixture as a surface layer; (3) carrying out coextrusion through three layers of die orifices according to the distribution forms in the step (1) and the step (2) to form three layers of strip-type extrudate, and carrying out two-way stretching on the strip-type extrudate to form a thin membrane; and (4) extracting low molecular weight organic matters in the thin membrane by a solvent, and then carrying out drying as well as thermal processing and shaping to obtain the porous three-layer nanometer ceramic composite membrane. The composite membrane prepared by using the preparation method has the advantages of higher ionic conductivity, favourable wettability with carbonic ester electrolyte, favourable thermal stability and mechanical property and higher membrane rupture temperature.

A lithium ion battery separator consists of a PE micro-porous substrate A and a micro-porous coating B which is located on the substrate A and formed of mixing pre-crosslinked rubber particles and ceramic fine powder composite materials. The separator has characteristics of good compressible elasticity, thermal shutdown, low heat shrinkage, high temperature membrane rupture resistance and so on.

The invention provides a preparation method of a polyester chip for a thick membrane with the thickness of more than 150mum. The preparation method which allows a polyhydroxy organic matter, an anti-bonding agent, a stabilizing agent and a catalyst to be added to one or more of diacids and one or more of dihydric alcohols which are treated as main raw materials is characterized in that: a direct esterification process is adopted, an esterification reaction is carried out for 1-3h under conditions of a temperature of 210-270DEG C and a pressure of 0.1-0.5MPa, and a polycondensation reaction is carried out for 1.5-3h under conditions of a temperature of 250-290DEG C and a pressure of equal to or less than 1KPa, the polyhydroxy organic matter is added when the esterification reaction is ended, and the polyester chip is obtained by granulating and drying after finishing the polycondensation reaction. The polyester chip has a slow crystallization rate, and when the membrane with the thickness of more than 150mum is processed from the polyester chip of the invention, casting chips do not become white and there is no need to add anti-bonding masterbatch chips; present routine production equipment can be adopted to directly produce the thick membrane; and performances of the thick membrane are excellent, and phenomena of large crystallization degree and much membrane rupture, which appear when super-bright polyester chips are used to produce the thick membrane, do not appear in the invention.

The invention provides a composite diaphragm for lithium batteries. The composite diaphragm is in a three-layer structure, two side surface layers are high-strength polypropylene microporous membranes, and a core layer is a low-melting-point self-turn-off polyethylene microporous membrane. The high-strength polypropylene microporous membranes are made from polypropylene resin, wherein the molecular weight is 300000-1000000, a molecular weight distribution index Mw/Mn is 4-8, isotacticity is larger than 96%, and the melt flow rate is 1.3-3.3. The low-melting-point self-turn-off polyethylene microporous membrane is made from high-density polyethylene, wherein the molecular weight is 100000-300000, a molecular weight distribution index Mw/Mn is 4-8, and the melt flow rate is 0.2-0.8. The composite diaphragm for the lithium batteries is low in pore closing temperature, high in membrane rupture temperature, wide in self-turn-off safety window, great in mechanical performance, high in puncture strength, high in safety in lithium ion battery production and utilization processes, appropriate in microporous diameter size, uniform in distribution and high in connectivity, the batteries are low in internal resistance, and improvement of operating efficiency of the batteries is benefited.

The invention discloses a method for fast and physically distinguishing the quality of mature ova of hucho taimen and relates to a physical evaluation method for the quality of the ova of hucho taimen. The method aims to solve the technical problems that in the existing multiplicative process of hucho taimen, the mature ova are evaluated by operators through intuitionistic senses from experience, the ova of hucho taimen cannot be evaluated at the early stage fast and accurately, consequently, the fertility rate and the hatchability decrease, and the membrane rupture offspring seed malformation rate and the floating offspring seed death rate increase. According to the method, the pubescent female parent fishes of hucho taimen are narcotized, the mature ova are extruded to a spawning basin containing an ovum buffer cleaning solution for trout from the abdominal cavities of the fish bodies, the average weight of the fish ova and the dispersion coefficient of the average weight, the average diameter of the fish ova and the dispersion coefficient of the average diameter and the average distribution density of fat droplets of the fish ova are measured, judgment is made on the basis of the physically-measured values to divide the fish ova into the superior grade, the medium grade and the inferior grade, the judgment can be completed in 1.5h, and the method has the advantage of being capable of being used for distinguishing the quality of the ova conveniently at the early stage. The method can be used in the field of aquaculture of hucho taimen.

The invention provides a photo-initiation cross-linked polymer isolating membrane and a preparation method thereof. The isolating membrane comprises high molecular weight polyethylene, an antioxidant,an assistant crosslinker and a photoinitiator which are crosslinked polymerized, wherein the average molecular weight of the high molecular weight polyethylene is 10.0X10<4> to 1000X10<4>, and the density is 0.940 to 0.976g/cm<3>; by taking the weight of the high molecular weight polyethylene as 100 parts, the weight of the antioxidant is 0.1 to 10, the weight of the assistant crosslinker is 0.1to 10, and the weight of the photoinitiator is 0.1 to 10; the photo-initiation cross-linked polymer isolating membrane is formed in a photo-initiation cross-linked manner. The thickness of the isolating membrane is 5 to 30 micrometers, a micropore diameter is 0.01 to 0.1 micrometer, the porosity is 30 to 60 percent, the difference of obturator temperature and membrane rupture temperature is 30 to60 DEG C, and the minimum hot-shrinkage rate is 0.5 percent, so that compared with the prior art, the photo-initiation cross-linked polymer isolating membrane has the advantages that the difference ofobturator temperature and membrane rupture temperature and the hot-shrinkage rate are obviously increased, moreover, the photo-initiation cross-linked polymer isolating membrane has good strength, average pore diameter and pore diameter distribution.

The invention discloses an obstetric membrane rupture and amniotic fluid drainage combined device. The device comprises a collecting box, wherein the upper surface of the collecting box is communicated with the bottom end of a water inlet tube, the top end of the water inlet tube extends into a connecting tube and is fixedly connected with the lower surface of a first gasket, the top end of the connecting tube is communicated with the bottom end of a liquid guiding tube, and the outer surface of the water inlet tube is fixedly connected with a fixing sleeve. The obstetric membrane rupture andamniotic fluid drainage combined device has the advantages that through the mutual cooperation of the connecting tube, an internal thread, an external thread, a first through hole, a second through hole, the fixing sleeve, the first gasket, a second gasket and a limiting block, the liquid guiding tube drives the internal thread to rotate through the connecting tube, an air bag and a liquid guidingtube body are fixedly installed by setting the internal thread and the external thread, and after the liquid guiding tube is used, disassembly is performed through the internal thread and the external thread to clean the liquid guiding tube and the collecting box, so that it is avoided that bacteria remaining in the liquid guiding tube cannot be cleaned away, thereby improving the convenience ofa cleaning process of the liquid guiding tube.

The invention discloses an ultra-high molecular polyethylene/poly (4-methyl-1-amylene) blended microporous membrane prepared with a thermally induced phase separation method and a preparation method thereof. The ultra-high molecular polyethylene/poly-4-methyl-1-amylene blended microporous membrane is prepared from the following components in parts by weight: 100 parts of ultra-high molecular polyethylene, 1 to 20 parts of poly (4-mehtyl-1-amylene), 0.1 to 5 parts of an antioxidant and 0.01 to 2 parts of an antioxidant aid. The molecular weight Mw of the ultra-high molecular polyethylene is 0.5*10<6> to 3*10<6>. The microporous membrane has the advantages that the poly (4-methyl-1-amylene) is high in melting point, high in vicat softening point, excellent in mechanical property, low in degree of crystallinity and high in gas permeability, so that the compound microporous membrane maintains excellent performance of TPX. Compared with the implementation of other modification methods, the equipment requirement is simple, and production can be carried out directly by needing slight improvement of original UHMWPE microporous membrane production equipment. The microporous membrane is a membrane with the thickness of 5 to 40 microns, the average pore size is 25 to 100 nanometers, the hot-shrinkage rate at the temperature of 130 DEG C is not more than 4.0, the tensile modulus is greater than 160 MPa, and the membrane rupture temperature is greater than 200 DEG C. The invention also discloses a preparation method of the microporous membrane.

The present invention proposes a production process of porcine blood globulin, comprising the following steps: a, collection; b, primary centrifugation; c, crushing; d, enzymatic hydrolysis; e, secondary centrifugation; f, enzyme inactivation; g, concentration; h , freeze-drying. Use the freeze-thaw method to promote the rupture of the hydrophobic bond structure of the cell membrane of the blood cell (blood cell), enhance its hydrophilicity, and the intracellular water forms ice crystals to burst the blood cell, achieving the effect of breaking the blood cell. In the subsequent enzymatic hydrolysis step, it can speed up the enzymatic hydrolysis Speed, improve the efficiency of enzymatic hydrolysis, reduce product loss.

The invention provides a high efficiency diaphragm material of a lithium ion battery and a preparation method of the diaphragm material. The diaphragm material is prepared from acrylate resin, polyolefine and a fluor membrane material. The preparation method comprises the following steps: firstly, performing co-mixing, fusion, extrusion and stretching membrane blowing on the acrylate resin, the polyolefine and the fluor membrane material, so as to obtain a basal membrane, wherein the fusion and co-extrusion temperature is 230 to 270 DEG C; secondly, performing plasma treatment on a material obtained in the first step in an air environment, so as to obtain the diaphragm material. Compared with the prior art, the diaphragm material has the advantages that the membrane rupture temperature can be effectively increased, the diaphragm cell closing temperature can be effectively reduced, a diaphragm can effectively improve the wettability of electrolyte, and in the battery application, the transmitting capacity of lithium ions in the battery between a positive electrode and a negative electrode can be effectively improved, and the battery capacity can be improved.

The present invention provides a buffalo embryo freezing method in combination with laser membrane rupture. The method comprises: culturing an in vitro fertilized buffalo embryo to be an expanded blastocyst; using a laser membrane rupture instrument to drill a blastocyst cavity; discharging blastocyst fluid; and then using freezing liquid to perform vitrification freezing. According to the present invention, discharging the blastocyst fluid before freezing can make the cryoprotectant enter an embryo more quickly, reduce the possibility of ice crystal forming in a cell, and thereby avoiding embryo damage to a large extent, and improving a freezing survival rate of the embryo. On the other hand, due to partial breaking of a zona pellucida before freezing, so that after thawing cultivation, the zona pellucida is easier to be hatched in a revived blastocyst cavity, and thereby facilitating embryo implantation of the embryo after transplanting, and improving a transplant pregnancy rate.

The invention relates to a polyolefin composition for preparing a millipore membrane. The polyolefin composition contains a propylene-butene-1 random copolymer and diatomite which are co-mixed, wherein the weight ratio of the propylene-butene-1 random copolymer to the diatomite is 30:70 to 80:20. The content of butylene-1 in the propylene-butylene-1 random copolymer is 1-6 mol%, and preferably is 3-6 mol%; the butylene-1 relative dispersity determined according to a nuclear magnetic resonance method is more than 98.5%, and preferably is more than 99.0%; the particle size of the diatomite is in a range of 0.1-20 [mu]m. The preparation method comprises carrying out melt co-mixing of the components comprising the propylene-butene-1 random copolymer and the diatomite according to the amount to obtain the polyolefin composition. The polyolefin composition is used for preparing the millipore membrane, and can significantly improve the membrane-drawing speed under conditions without membrane rupture and of ensuring the porosity and the pore size.

The invention relates to a membrane rupture apparatus for visual obstetrical department. The membrane rupture apparatus comprises a membrane rupture tube, a membrane rupture tool, an observer and a light source, wherein the membrane rupture tube is a hollow round tube of a transparent structure; one end of the membrane rupture tube is a connecting end and the other end of the membrane rupture tube is a membrane rupture end; the membrane rupture end is of a semi-arc structure, and a membrane rupture opening is formed in the center of the membrane rupture end; the sidewall, close to the connecting end, of the membrane rupture tube is provided with an inlet/outlet from which the membrane rupture tool can move in and out; the observer is of a transverse L-shaped hollow structure which is provided with openings at two ends; a reflector, which is used for conducting observation, is arranged in the observer; a controller, which is used for controlling a light source switch and a power supply, is arranged on a right-angle part of the back side of the reflector; the connecting end of the membrane rupture tube is connected to a connecting port of the observer in a detachable mode; and the membrane rupture tool is an operating rod which is provided with a membrane rupture knife or a membrane rupture needle. With the application of the membrane rupture apparatus disclosed by the invention, the position situation of a fetal membrane can be observed, so that a membrane rupture efficiency is improved, and a fetus is protected from being hurt due to blind piercing and inserting.

The invention relates to a light gas gun launcher which includes a launch tube; a launch component, a gas storage component and a gas supply component, the launch component includes a launch cavity, a first gas guiding channel and a second gas guiding channel, the launch cavity is used for setting a projectile, the first gas guiding channel is communicated with the launch cavity, and evenly guides a gas to the side wall of the projectile, the second gas guiding channel is communicated with the launch cavity, and guides the gas to the end wall of the projectile, the launch cavity is connected with the launch tube, the gas storage component is communicated with the first gas guiding channel, the gas supply component comprises a first pipe and a second pipe, the first pipe is communicated with the first gas guiding channel, the second pipe is communicated with the second gas guiding channel, and the first pipe and the second pipe are respectively connected with a gas source. The light gas gun launcher has the advantages of simple structure and clear principle, the controllability of an electromagnetic valve type launch system and the high efficiency of a membrane rupture launch system are combined, and compared with the prior art, the light gas gun launcher has a great breakthrough in launching pressure, result errors are smaller, and working efficiency is higher.

The invention relates to a preparation method of a self-healing polymeric water-treatment membrane and belongs to the field of functional polymeric membrane materials. After ultrasonic mixing of a dispersion and a membrane casting solution, the mixture is cast into a flat sheet membrane or spun into a hollow fiber membrane through a phase separation method so as to obtain the self-healing polymeric water-treatment membrane. According to the healing mechanism of the self-healing water-treatment membrane, an isocyanate-terminated healing agent is contacted with water for crosslinking and then the healing material and the membrane material are rapidly combined so as to eliminate cracks generated under external force. During the water treatment process of the self-healing water-treatment membrane, the treatment will not be interrupted because of rupture of the membrane; however, under the water flow action, the membrane will rapidly react with the healing agent so as to rapidly heal the membrane ruptures.

The invention discloses a method for purifying superoxide dismutase (SOD) from tilapia mossambica blood. The method comprises the following steps of: diluting the collected clean tilapia mossambica blood red cell with double distilled water, carrying out membrane rupture treatment by using ultrasonic accessory cells; successively adding absolute ethyl alcohol and chloroform sediment protein, centrifuging, collecting supernate and removing an organic solvent with a pressure blowing concentrator; heating the collected supernate at 60 DEG C, centrifuging and collecting the supernate; rapidly purifying a liquid chromatogram system control by using multifunction protein; and purifying the SOD liquid obtained in the step with anion exchange to obtain high-purity SOD liquid. The purification method is short in time consumption and simple in operating unit and is suitable for industrial production. By the method, the problem of environmental pollution caused by tilapia mossambica blood discharge can be solved, and the additional value of enterprises can be remarkably increased.