41 results about "Membrane property" patented technology

The present invention provides optical systems and methods for determining a characteristic of a cell, such as cell type, cellular response to a biochemical event, biological state and the like. The methods typically involve using interferometry to observe membrane properties in a cell and then use this information to determine one or more characteristics of a cell. The methods of the invention are useful for applications such as drug screening as well as diagnostic techniques.

The invention relates to a method for preparing a high-hydrophobicity microporous membrane. A polymer and a membrane-making diluent membrane liquid are uniformly mixed and then are coated on a solid template on the surface of a micro structure by virtue of a thermally induced phase separation method under assistance of a solid template; the microporous membrane is prepared by the thermally induced phase separation method; and under the synergistic effect of the template and phase separation, the hydrophobicity of the membrane surface and other membrane properties are improved. The microporous membrane is high in hydrophobicity; a water contact angle is up to 165 degrees at most, and a rolling angle is 3 degrees, so that the ultra-high hydrophobicity is reflected; the permeation performance is high; the nitrogen flux under the 0.1MPa membrane penetration pressure difference is more than or equal to 260 m<3> / (m<2>.h); an aperture distribution range is small; the maximum aperture is less than or equal to 0.5 microns; the mechanical performance is high; the tensile strength is more than or equal to 3.0 MPa; and the breakage elongation is more than or equal to 68 percent.

The present invention relates to a branched and sulphonated multi block copolymer and an electrolyte membrane using the same, more precisely, a branched and sulphonated multi block copolymer composed of the repeating unit represented by formula 1 and a preparation method thereof, a hydrogenated branched and sulphonated multi block copolymer, a branched and sulphonated multi block copolymer electrolyte membrane and a fuel cell to which the branched and sulphonated multi block copolymer electrolyte membrane is applied.The electrolyte membrane of the present invention has high proton conductivity and excellent mechanical properties as well as chemical stability, so it can be effectively used for the production of thin film without the decrease of membrane properties according to the increase of sulfonic acid group since it enables the regulation of the distribution, the location and the number of sulfonic acid group in polymer backbone.

The invention discloses a film water curing technique of multifunctional hyperfiltration film off-line purifier, which is characterized by the following: the pollution in reverse osmosis membrane system is cleared by carrying out the techniques of film positive washing, negative washing and pure water side pressurization washing; the invention can evaluate and test agent and reverse osmosis membrane property by imitating field producing water condition.

The present invention relates to a branched and sulphonated multi block copolymer and an electrolyte membrane using the same, more precisely, a branched and sulphonated multi block copolymer composed of the repeating unit represented by formula 1 and a preparation method thereof, a hydrogenated branched and sulphonated multi block copolymer, a branched and sulphonated multi block copolymer electrolyte membrane and a fuel cell to which the branched and sulphonated multi block copolymer electrolyte membrane is applied. The electrolyte membrane of the present invention has high proton conductivity and excellent mechanical properties as well as chemical stability, so it can be effectively used for the production of thin film without the decrease of membrane properties according to the increase of sulfonic acid group since it enables the regulation of the distribution, the location and the number of sulfonic acid group in polymer backbone.

The present invention provides optical systems and methods for determining a characteristic of a cell, such as cell type, cellular response to a biochemical event, biological state and the like. The methods typically involve using interferometry to observe membrane properties in a cell and then use this information to determine one or more characteristics of a cell. The methods of the invention are useful for applications such as drug screening as well as diagnostic techniques.

The invention discloses a membrane fouling and cleaning method, in particular to a membrane fouling and cleaning method of brine refining process by the membrane method, which is suitable for chlor-alkali industry and salt making industry, and comprises the following specific steps: firstly, carrying out back flushing for clearing filter cakes deposited on the surface of the membrane; secondly, carrying out acid cleaning for clearing calcium carbonate and magnesium hydroxide particle fouling remained after the back flushing; and finally, cleaning by using a membrane cleaning agent for clearing barium sulfate particle fouling which can not be cleared by the acid cleaning. The membrane fouling and cleaning method provided by the invention has the following beneficial effects of easily obtained raw materials and convenient use, can effectively clear membrane fouling, reduce membrane cleaning frequency, improve the stability of a membrane system, reduce energy consumption, can completely and rapidly restore membrane flux loss, speed up the regeneration of the membrane system, has no damage to the membrane and ensures the consistency of membrane properties before and after cleaning.

The invention provides a polymer electrolyte composite film which is superior in membrane properties and membrane strength and can achieve high proton conductivity, and a membrane-electrode assembly and a fuel cell which use the membrane. The polymer electrolyte composite film contains a block copolymer including a hydrophilic block and a hydrophobic block, and a solid acid, and has a microphase separation structure including a hydrophilic domain formed from the hydrophilic block and a hydrophobic domain formed from the hydrophobic block. The solid acid is localized in the hydrophilic domain.

The invention belongs to the field of composite materials, and relates to a preparation method of a polyvinylidene fluoride (PVDF) porous coordination composite ultrafiltration membrane material. The preparation method is characterized in that transition metal ions are immobilized on a PVDF membrane by using molecules with double amino groups, and the in-situ growth of porous coordination polymers (PCPs) in an organic ligand solution is realized. The preparation method provided by the invention has the advantages that a new method for preparing the PVDF / PCPs composite ultrafiltration membrane material by a one-pot method is developed; PVDF and the PCPs are connected through chemical bonds, and the high-stable ultrafiltration membrane material is formed; by adjusting the types and content of organic ligands and metal source ions in a precursor solution, reaction conditions, and the like, the pore structure, growth amount, and the like of the PCPs can be effectively controlled, thereby achieving the directional regulation and control of membrane properties; the PVDF / PCPs ultrafiltration membrane material prepared by the method integrates porosity and hydrophilicity, the anti-fouling ability of an ultrafiltration membrane is improved, and the service life is prolonged.

Mesoporous membranes have shown promising separation performance with a potential to lower the energy consumption, leading to a dramatic cost reduction. Recently, an extensive effort has been made on the design of membranes which brought a significant progress toward the synthesis of well-defined porous morphologies, most of which synthesized by surfactant-template methodology. Currently, the most well-designed state-of-the-art membranes using this technique are made from metals, polymers, carbon, silica, etc. In the present invention, we demonstrate mesoporous calcium-silicate particles having superior separation capacity and optimal permeability, thereby leading to reduced energy consumption for selective separation of gases / liquids and / or the combination thereof. We explore various methods to improve the calcium-silicate membranes properties by tuning pore density during the synthesis / aging process, while favoring the formation of uniformly distributed nanopores. Lowering particle density by controlling calcium to silicon ratio along with optimizing the surface area are essential in achieving our objective.

A method for in situ monitoring of a membrane of a membrane separation system comprises measuring a complex impedance of the membrane at a plurality of frequencies to provide an indication of the electrical conduction and electrical polarization properties of the membrane. The membrane based separation system for removing or reducing the concentration of materials carried in a fluid including a separation membrane has a first pair of electrodes separated by the membrane and arranged for measurement of the complex impedance of the membrane at a plurality of frequencies to provide the indication of the membrane properties. There may also be a second pair of electrodes separated by the membrane for injecting the stimulus current such that the injecting and monitoring functions are separated.

The invention relates to a preparation method of a strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration dry membrane, which comprises the steps of: carrying out heat treatment on the existing strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration wet membrane; then soaking the treated wet membrane into membrane drying treatment fluid; and finally drying the polyether sulfone tubular ultrafiltration wet membrane to obtain the tubular ultrafiltration dry membrane which is stable in membrane properties, resists strong acid and strong base, and is high in mechanical strength and good in water permeability. The tubular ultrafiltration dry membrane is simple and feasible in preparation method and can be continuously produced; and the produced membrane product can be stored in a dry state, and is convenient for pouring of a membrane component and convenient to store and transport.

A contactor configured for use in a dehumidification system is provided including a plurality of contact modules. Each contact module has a porous membrane that defines an internal space through which a hygroscopic material flows. A membrane property of the porous membrane of at least one contact module is substantially different than the other membranes of the plurality of contact modules.

Exemplary embodiments of a methodology, procedure, system, method and computer-accessible medium can be provided to obtain particular information relating to at least one transport property of a material containing at least one membrane, and to determine, e.g., a permeability of the membrane of the material and / or a surface area of the membrane of the material, as a function of, e.g., the obtained particular information.

The invention discloses preparation of modified micropore spheres on the basis of a ZIF-8 type metal-organic framework material and a preparation method for preparing a novel polyphenylene sulfone solvent-resistant nanofiltration membrane by applying the modified micropore spheres. The method comprises the steps that ZIF-8 nanoparticles grow inside macropore spheres and on the surfaces of the macropore spheres, and the modified micropore spheres are obtained; the modified novel micropore spheres are added to a polyphenylene sulfone membrane casting solution, and the novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing the modified micropore spheres is prepared through an immersion-phase conversion method. The reparation method of the novel polyphenylene sulfone solvent-resistant nanofiltration membrane containing the modified micropore spheres has the advantages that nano-scaled porous structures of the modified micropore spheres are utilized for improving the pore structure of the polyphenylene sulfone membrane, large-size solute molecules in the organic solution are effectively intercepted, and fluid channels, facilitating solvent permeation, in the membrane are increased; when the addition ratio of the modified micropore spheres is 1.0 wt%, the membrane property is the best, and the permeation flux and interception rate can be increased simultaneously.

The invention provides a method for preparing a low-pressure high-selectivity nanofiltration membrane. According to the method, a small amount of amantadine is put into an oil-phase solution, the amantadine joins in an interface polymerization process in a mode of reacting with a part of acyl chloride groups in trimesoyl chloride in advance, and thus the amantadine is successfully introduced intopolyamide. Due to the amantadine which is uniformly dispersed into a polyamide layer and is of a special cage structure, the free volume of a polymer chain can be increased; in addition, as the amantadine selectively passes through magnesium ions and sodium ions, the cross-linking structure of the generated polyamide and corresponding membrane properties are remarkably affected, and the membrane has wide application prospects in fields such as industrial wastewater zero omission and organic small molecule grade concentration.

The invention relates to a preparation method of a strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration dry membrane, which comprises the steps of: carrying out heat treatment on the existing strong-acid-resistant strong-base-resistant polyether sulfone tubular ultrafiltration wet membrane; then soaking the treated wet membrane into membrane drying treatment fluid; and finally drying the polyether sulfone tubular ultrafiltration wet membrane to obtain the tubular ultrafiltration dry membrane which is stable in membrane properties, resists strong acid and strong base, and is high in mechanical strength and good in water permeability. The tubular ultrafiltration dry membrane is simple and feasible in preparation method and can be continuously produced; and the produced membrane product can be stored in a dry state, and is convenient for pouring of a membrane component and convenient to store and transport.

A branched multiblock polybenzimidazole-benzamide copolymer, specifically, one consisting of a repeating unit represented by Formula 1, and a method for preparing the same; an electrolyte membrane using the branched multiblock copolymer, a consistent electrolyte paste / gel and a method for preparing the same; a membrane-electrode assembly (MEA) using the electrolyte membrane and the consistent electrolyte paste / gel and a method for preparing the same; and a fuel cell prepared from the membrane-electrode assembly. The electrolyte membrane according to the present invention has high hydrogen ion conductivity over a wide temperature range, and excellent physical properties such as mechanical properties, chemical resistance and thermal stability. Deterioration of the membrane properties is effectively controlled by phosphoric acid doping and high hydrogen ion conductivity is realized even with a low phosphoric acid doping level. This consistent electrolyte paste / gel may be useful in improving the operating performance of a fuel cell by coating the electrolyte uniformly.

The invention relates to a method for improving a sizing adhesive formula by means of ammonium dihydrogen phosphate and a silane coupling agent, and belongs to the field of textile processing. The method comprises the step of adding the ammonium dihydrogen phosphate and the silane coupling agent to the sizing adhesive formula containing phosphate ester starch, acrylic ester and water, wherein the mass of the phosphate ester starch is 3%-5% of the total mass of the sizing adhesive formula, the mass of the acrylic ester is 3%-5% of the total mass of the sizing adhesive formula, the mass of the ammonium dihydrogen phosphate is 0.1%-1% of the total mass of the sizing adhesive formula, and the mass of the silane coupling agent is 0.1%-2% of the total mass of the sizing adhesive formula. Due to the fact that the ammonium dihydrogen phosphate and the silane coupling agent are added into an adhesive, containing the phosphate ester starch and solid acrylic ester, for mixed sizing, the permeability of the adhesive for mixed sizing and the coating property of the adhesive for yarn surface sizing can be significantly improved, and the sizing membrane property is enhanced.

Mesoporous membranes have shown promising separation performance with a potential to lower the energy consumption, leading to a dramatic cost reduction. Recently, an extensive effort has been made on the design of membranes which brought a significant progress toward the synthesis of well-defined porous morphologies, most of which synthesized by surfactant-template methodology. Currently, the most well-designed state-of-the-art membranes using this technique are made from metals, polymers, carbon, silica, etc. In the present invention, we demonstrate mesoporous calcium-silicate particles having superior separation capacity and optimal permeability, thereby leading to reduced energy consumption for selective separation of gases / liquids and / or the combination thereof. We explore various methods to improve the calcium-silicate membranes properties by tuning pore density during the synthesis / aging process, while favoring the formation of uniformly distributed nanopores. Lowering particle density by controlling calcium to silicon ratio along with optimizing the surface area are essential in achieving our objective.

The invention features methods for regulating vascular properties by controlling the membrane properties of endothelial cells using optogenetics and light. The invention features methods to transport therapeutics across the vascular barrier into tissues such as the brain and the lung, with high spatial and temporal precision, and for controlling vascular properties such as vascular tone, arterial diameter, and vascular growth.

The invention provides a preparation method of a reverse osmosis membrane, which comprises the following steps: preparing a 0.1-10 wt% polyfunctional aromatic amine solution, and stirring uniformly to obtain a water phase solution; preparing a 0.01-10 wt% polyfunctional acyl chloride organic phase solution to obtain an oil phase solution; fixing an ultrafiltration membrane with a support layer to a rotary bearing, and starting the rotating shaft to drive the ultrafiltration membrane to move; sequentially spraying the water phase solution and oil phase solution onto the ultrafiltration membrane surface by a film coating device, and waiting until the organic solvents on the membrane surface are completely volatilized; and sending the dry film of which the organic solvents are completely volatilized into an 80-100 DEG C blast drying oven, and drying until the organic phase solvents are volatilized, thereby obtaining the reverse osmosis membrane. The preparation method obviously lowers the recovery cost of waste liquor on the premise of stabilizing the membrane properties.

A branched multiblock polybenzimidazole-benzamide copolymer, specifically, one consisting of a repeating unit represented by Formula 1, and a method for preparing the same; an electrolyte membrane using the branched multiblock copolymer, a consistent electrolyte paste / gel and a method for preparing the same; a membrane-electrode assembly (MEA) using the electrolyte membrane and the consistent electrolyte paste / gel and a method for preparing the same; and a fuel cell prepared from the membrane-electrode assembly. The electrolyte membrane according to the present invention has high hydrogen ion conductivity over a wide temperature range, and excellent physical properties such as mechanical properties, chemical resistance and thermal stability. Deterioration of the membrane properties is effectively controlled by phosphoric acid doping and high hydrogen ion conductivity is realized even with a low phosphoric acid doping level. This consistent electrolyte paste / gel may be useful in improving the operating performance of a fuel cell by coating the electrolyte uniformly.

The invention relates to a method for improving a sizing adhesive formula by means of ammonium dihydrogen phosphate, and belongs to the field of textile processing. The method comprises the step of adding the ammonium dihydrogen phosphate to the sizing adhesive formula containing phosphate ester starch, acrylic ester and water, wherein the mass of the phosphate ester starch is 3%-5% of the total mass of the phosphate ester starch, the acrylic ester, the ammonium dihydrogen phosphate and the water, the mass of the acrylic ester is 3%-5% of the total mass of the phosphate ester starch, the acrylic ester, the ammonium dihydrogen phosphate and the water, and the mass of the ammonium dihydrogen phosphate is 0.1%-1% of the total mass of the phosphate ester starch, the acrylic ester, the ammonium dihydrogen phosphate and the water. The permeability of mixed sizing agents and the coating property of an adhesive for yarn surface sizing can be significantly improved, and therefore the sizing membrane property and the sizing effect are enhanced.

The invention discloses a multiphase separation method, device and application thereof. The device involved in the present invention includes a porous membrane and a liquid composite membrane composed of a functional liquid, which is sealed in the device by a sealing material and a clamping device. One side of the device is provided with at least two channel openings; the other side is provided with at least one Channel port; the first channel port is connected to the first input channel, the second channel port is connected to the first output channel, and the third channel port is connected to the second output channel; between the first input channel and the first output channel and between the liquid composite film and the second channel A connection channel is provided between the two output channels. During the specific implementation of the device of the present invention, based on the action mechanism of the liquid composite membrane, the change of the surface tension of the functional liquid caused by external stimuli and the Marangoni flow are used to change the properties of the transported material through the membrane, and the multi-phase substance is regulated in combination with the liquid composite membrane The difference in properties makes the two-phase substances flow out from different output channels.

The invention discloses a method for producing polyurethane coated pigment microcapsules for foam dyeing and belongs to the technical field of macromolecular textile chemistry. According to the method disclosed by the invention, the polyurethane coated pigment microcapsules with shells containing CO2 gas cavities are synthesized; the polyurethane coated pigment microcapsules are uniformly coated on the surface of a cotton textile by utilizing a foam coating method, so that pigment and the cotton textile are endowed with high-fastness color performance. By adopting the foam coating method, the consumption of energy sources and the emission of wastewater can be reduced. The pigment is covered by a membrane property of polyurethane macromolecule, so that the color stability of the pigment is improved; the shells of the microcapsules contain the CO2 gas cavities so that a certain warm-keeping property is given to the textiles.

The invention discloses a film water curing technique of multifunctional hyperfiltration film off-line purifier, which is characterized by the following: the pollution in reverse osmosis membrane system is cleared by carrying out the techniques of film positive washing, negative washing and pure water side pressurization washing; the invention can evaluate and test agent and reverse osmosis membrane property by imitating field producing water condition.