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267 results about "Adsorptive membrane" patented technology
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Heavy metal ion adsorbed film and preparation
InactiveCN101254457AImprove stabilityGood regeneration performanceOther chemical processesWater/sewage treatment by sorptionCross-linkPolymer science
The invention relates to a heavy metal ion adsorption film and a production method thereof. The heavy metal ion adsorption film is composed of polyvinyl alcohol and amido polymers at a polyvinyl alcohol / amido polymer ratio of (95:5) to (20:80). The amido polymers are polyvinyl amine, polyallylamine and branched polyethylene. The amido polymers are introduced into the aqueous solution of polyvinyl alcohol and then the resulting mixture undergoes crosslinking reaction with a cross-linking agent to form a three-dimensional polymer network. The method is simple, feasible and free of organic solvents. The introduction of amido groups can efficiently increase the water swellability of polyvinyl alcohol film and simultaneously enhance the adsorbability of the film to heavy metal ions.
Owner:威海金钰环保科技有限公司
Sulfur-containing bis-imidazoline type carbon dioxide corrosion inhibitor and preparation method thereof
InactiveCN102321463AImprove protectionGood water solubilityOrganic chemistryBorehole/well accessoriesCarbon dioxide corrosionActive agent
The invention discloses a sulfur-containing bis-imidazoline type carbon dioxide corrosion inhibitor and a preparation method thereof. The corrosion inhibitor comprises the following components in percentage by weight: 20-50 percent of sulfur-containing bis-imidazoline quaternary ammonium salt, 1-5 percent of nonionic surfactant, 40-70 percent of low molecular alcohol solvent and 5-10 percent of alkynol, wherein a sulfur-containing bis-imidazoline compound has a general formula of a structure which is shown in the specification; the number of carbon atoms in R of the formula is 5 or 8; the nonionic surfactant is fatty alcohol-polyoxyethylene ether or alkylphenol ethoxylate; the low molecular alcohol solvent is methanol, ethanol, isopropanol or ethylene glycol; and the alkynol is propargyl alcohol or hexynol. In the invention, the sulfur-containing bis-imidazoline compound which is generated through dehydration between dicarboxylic acid and polyamine molecule, dehydration reaction in the molecule and further reaction with the sulfur-containing compound is adopted; the molecule contains a plurality of active adsorption centers such as two diazo five-membered heterocyclic rings, a sulfur-containing group and the like; and a formed organic adsorption membrane has better protection effect on carbon steel.
Owner:UNIV OF SCI & TECH BEIJING
Adsorptive membranes for trapping viruses
ActiveUS20080014625A1Release resourcesImprove usabilityMembranesSemi-permeable membranesAdsorptive membraneTrapping
A disposable, virus-trapping membrane, and a corresponding method to remove viruses from solution are described. The membrane includes a disposable, micro-porous filter membrane and a ligand immobilized on the membrane. The ligand irreversibly and selectively binds viruses. The ligand also has a pKa sufficiently high to repel antibodies via electrostatic charge repulsion.
Owner:WISCONSIN ALUMNI RES FOUND
Adsorption membranes, method of producing same and equipment, including the adsorption membranes
ActiveUS20050121385A1Easy to separateSmall sizeSemi-permeable membranesMembranesSilica particleSorbent
The present invention relates to adsorption membranes, comprising microporous polymer membranes into which are incorporated porous silicon dioxide particles modified with hydrocarbon ligands having 2 to 24 carbon atoms as adsorbent particles. Furthermore, the present invention relates to a method of producing the inventive adsorption membranes as well as devices which comprise the inventive adsorption membranes.
Owner:SARTORIUS STEDIM BIOTECH GMBH
Preparation method and application of hydroxypropyl guar gum/nanocellulose cross-linked adsorption film
ActiveCN106345424AGood adsorption/desorption performanceImprove mechanical propertiesSemi-permeable membranesOther chemical processesCross-linkMethyl violet
The invention discloses s preparation method of a hydroxypropyl guar gum / nanocellulose cross-linked adsorption film. The method takes hydroxypropyl guar gum and microcrystalline cellulose as main raw materials, and comprises the steps: thinning the microcrystalline cellulose in a nano grinder and a high-strength ultrasonic wave generator successively to prepare nanocellulose, then respectively dispersing and dissolving the nanocellulose and hydroxypropyl guar gum in maleic acid, then adding maleic anhydride and sodium hypophosphite, stepwise heating to carry out esterification and cross-linking reaction, centrifuging and defoaming the reactant, shaping the reactant in a mold, forming a film by drying, and cleaning and freeze-drying the film to obtain the adsorption film. The film prepared by the method is light yellow and transparent, has good adsorptive capacity on copper ions, zinc ions, led ions, methylene blue and methyl violet, and simultaneously has higher mechanical properties.
Owner:KUNMING UNIV OF SCI & TECH
Phosphorus-free scale and corrosion inhibitor, and preparation technology thereof
InactiveCN107215968AReduce usageGood chelation dispersionSpecific water treatment objectivesScale removal and water softeningToxic materialChemistry
The invention belongs to the technical field of sewage treatment, and especially relates to a phosphorus-free scale and corrosion inhibitor, and a preparation technology thereof. The preparation technology of the phosphorus-free scale and corrosion inhibitor has the advantages of simplicity, no generation of toxic substances, environmental protection and low cost; and the molecular chain of the prepared scale and corrosion inhibitor contains rich ether groups, carboxylate radicals and other active groups, the phosphorus-free scale and corrosion inhibitor and scale forming cations form a stable structure in order to reach the high-efficiency scale and corrosion inhibition purpose, the corrosion inhibitor has the advantages of phosphorus-free, nontoxic, green and environmentally-friendly components, good biodegradability and small use amount, can form an adsorption film on the surface of metal in order to realize the corrosion inhibition effect, has good chelating and dispersing effects on calcium salts in water, and has a distortion effect on crystals to increase the internal stress of the crystals in order to make the crystals easily ruptured.
Owner:太仓市格雷得五金有限公司
Method of making an adsorptive membrane
InactiveUS20060068124A1Improve featuresAvoid cloggingSemi-permeable membranesActivated carbonAdsorptive membrane
A novel method of making an adsorptive membrane that incorporates super activated carbon particles in which the activated carbon particles that are incorporated within the membrane retain their highly adsorptive characteristics. In accordance with one form of the method of the invention, the multiplicity of small pores in the activated carbon particles are uniquely protected from becoming clogged during the process of forming the adsorptive membrane by initially wetting the particles with water prior to intermixing the particles with the hydrocarbon solvent solution of a polyurethane resin from which the membrane is formed.
Owner:WILLIAMS COLE
Foaming agent for lightweight grouting material
InactiveCN102964142AImprove stabilityImprove temperature adaptabilityCeramicwareCelluloseModified carbon
The invention discloses a foaming agent for a light grouting material. The foaming agent comprises the following components, by weight: 5-8 parts of alkylphenol polyoxyethylene, 1-3 parts of sodium alcohol ether sulphate, 2-5 parts of sodium dodecyl sulfate, 3-6 parts of fatty alcohol ammonium sulfate, 1-2 parts of polyacrylamide, 1-2 parts of sodium carboxymethyl cellulose, 2-3 parts of xanthan gum, 0.5-2 parts of modified carbon foam powder and 80-100 parts of water. The foaming agent provided by the invention has high foaming capacity and strong foam stability; and the produced foam has surface adsorption film with high strength, and the foaming agent has advantages of good temperature adaptability, biodegradability, no toxicity or corrosion, low cost and easiness for usage.
Owner:安徽艾柯泡塑股份有限公司
Method of making articles of protective clothing containing adsorptive membranes
InactiveUS20060065353A1High protection levelComfortable to wearChemical protectionHeat protectionActivated carbonAdsorptive membrane
A protective article such as a glove, sock or vest and the method of making same that is easy to don, is comfortable to wear and, at the same time, due to the incorporation of a novel membrane within which the highly adsorptive super-activated carbon particles are embedded, provides substantial protection to the user against exposure from hazardous chemical vapors. A unique feature of the method of the invention for making the protective articles of the invention is the novel step of incorporating highly adsorptive super-activated carbon particles within a thin polyurethane membrane in a manner such that the adsorptive properties of the activated carbon particles remain substantially undiminished.
Owner:WILLIAMS COLE
Adsorption membranes, method of producing same and equipment, including the adsorption membranes
ActiveUS7311832B2Easy to separateSmall sizeLaboratory glasswaresSedimentation separationSorbentPolymer
Owner:PROPGUARD +1
Heavy metal ion adsorption film and preparation method thereof
InactiveCN105817204ASmall adsorption capacityHigh adsorption capacityOther chemical processesWater contaminantsSolventMetal
The invention relates to a heavy metal ion adsorption film and a preparation method thereof. The adsorption film is composed of a metal organic frame material, 2-mercapto benzimidazole, a modifier, a stabilizer, a solvent A and a solvent B. The 2-mercapto benzimidazole is fixedly carried on the metal organic frame material and is used for enhancing the adsorption capacity of the adsorption film for the heavy metal ion.
Owner:NINGBO XIAYUAN TECH
Porous adsorption film and preparation method thereof
InactiveCN104549176AGood effectImprove adsorption capacityOther chemical processesAlkali metal oxides/hydroxidesPolyethylene glycolEthylic acid
The invention discloses a porous adsorption film and belongs to the field of macromolecules. The porous adsorption film is prepared from chitosan sol, a beta-cyclodextrin polymer, polyethylene glycol-20000, a silane coupling agent and titanium dioxide colloid according to a certain ratio, wherein the beta-cyclodextrin polymer is formed by crossly linking beta-cyclodextrin and sodium citrate; the chitosan sol is formed by adding chitosan into acetic acid and stirring; and the titanium dioxide colloid is prepared from tetrabutyl titanate, absolute ethyl alcohol, distilled water and glacial acetic acid. The porous film can adsorb heavy metal ions and also can adsorb organic matters. The invention further discloses a preparation method of the porous adsorption film.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Membrane electrode material, preparation method and application of membrane electrode material adsorption-electrochemical lithium method to extract lithium
ActiveCN111647746AEfficient separationIncrease capacityMaterial nanotechnologyMembranesCarbon coatingAdsorptive membrane
Owner:BEIJING UNIV OF CHEM TECH
Benzimidazoline corrosion inhibitor prepared from refined swill-cooked dirty oil
The invention relates to the technical field of metal corrosion inhibition and particularly discloses a benzimidazoline corrosion inhibitor prepared from refined swill-cooked dirty oil, of which the chemical formula is as shown in the description, wherein R=C(16-20) saturated alkyl or unsaturated alkyl; and R1=H, CH3 and C6H5. The corrosion inhibitor is obtained in the way that saturated alkyl and unsaturated alkyl or phenyl, of different chain lengths, are added into benzimidazole molecules, so that the hydrophobicity of a protective film is improved while the density of pi electron cloud, capable of being coordinated with metals, in the molecules is increased, accordingly, the metal corrosion rate is greatly reduced, and the metal anticorrosiveness is increased. The corrosion inhibitor is an oil-soluble product, can be used for corrosion protection of oil field pipelines and industrial pickling, can form a compact and firm adsorption film on a metal surface, reduces the metal corrosion rate and achieves the purpose of metal corrosion protection.
Owner:GUANGDONG UNIV OF TECH
Basement membrane, composition containing humic acid, preparing method and application of composition, and product
ActiveCN105778550AEasy to prepareControllable structureGas treatmentOther chemical processesLactobacillus plantarumHumic acid
The invention discloses a basement membrane, a composition containing humic acid, a preparing method and application of the composition, and a product.The composition containing humic acid is prepared in the first way or the second way.According to the first way, medicinal material straw, lactobacillus plantarum and saccharomycetes are mixed and subjected to heterologous synthesis and solid-liquid separation to obtain the composition.According to the second way, spray-drying is conducted on the composition obtained through the first way at 40-60 DEG C to generate powder.The preparing method of the composition is simple, and the prepared product has a structure easy to control and stable functions.The application range of humic acid is widened, and a haze resistant, an adsorption film, a packaging film, an anti-fungi agricultural film and a basement membrane are prepared.The haze resistant can resist haze.The adsorption film can be used for automobile exhaust adsorption and has high adsorption capacity.The packaging film has a high bacteriostasis rate.The anti-fungi agricultural film has good comprehensive performances and is degradable so as to be beneficial to environment protection.The basement membrane has an adsorption property, a water retention property and properties of fertilizer and pesticide, and is wide in application range.
Owner:黑龙江臻旸生物科技有限公司 +1
Hybrid adsorptive membrane reactor
ActiveUS20070053811A1Improve production yieldHigh purityMembranesSemi-permeable membranesAdsorptive membraneChemical reaction
A hybrid adsorbent-membrane reactor in which the chemical reaction, membrane separation, and product adsorption are coupled. Also disclosed are a dual-reactor apparatus and a process using the reactor or the apparatus.
Owner:MEDIA & PROCESS TECH +2
Frequency measuring device and odor sensor and electronic equipment which are provided with the frequency measuring device
ActiveUS8917078B2Inhibition effectReduce in quantityAnalysing fluids using sonic/ultrasonic/infrasonic wavesFrequency analysisControl circuitFrequency regulation
A frequency measuring device according to an embodiment of the invention includes a first resonator provided with a first adsorption film, a second resonator provided with a second adsorption film, a first oscillation circuit which is connected to the first resonator and is provided with a first frequency regulator that can regulate the frequency of a first oscillation signal and output the first oscillation signal, a second oscillation circuit which is connected to the second resonator and is provided with a second frequency regulator that can regulate the frequency of a second oscillation signal and output the second oscillation signal, a measuring circuit which can measure the frequencies of the first oscillation signal and the second oscillation signal, and a control circuit which can control the first frequency regulator and the second frequency regulator.
Owner:SEIKO EPSON CORP
Membrane electrode material, its preparation method and application in lithium extraction by adsorption-electrochemical coupling technology
This invention provides a membrane electrode material and its preparation method, as well as the application of the material into lithium extraction by adsorption-electrochemical coupling method. The membrane electrode material is described as MnO@C. The preparation steps are as follows: LiMn2O4 is firstly obtained by calcining lithium carbonate and manganese carbonate, which is then dispersed in hydrochloric acid solution. After stirring and separating, the solid products are dried to obtain λ-MnO2. The λMnO2 is added to the raw material of Mn-MOF-74, and then the Mn-MOF-74 coated λ-MnO2 can be obtained by hydrothermal reaction. By further calcining Mn-MOF-74 coated λ-MnO2 in nitrogen atmosphere, the membrane capacitor / electrode material can be obtained as MnO@C. The material is fabricated into an adsorption film electrode plate and assembled into an adsorption-electrochemical coupling lithium extraction device. The pure lithium solution can be obtained in the recovery pool through the combined lithium extraction and lithium recovery process. In this invention, the thickness of the carbon coating layer in the electrode material is adjustable. Adsorption-electrochemical coupling technology takes the advantages of both adsorption and electrochemical lithium intercalation, which can extract and recover lithium resources with high capacity. Thus, this invention not only achieves high-efficiency separation of lithium resources, but also opens up a new way for the extraction of lithium resources.
Owner:BEIJING UNIV OF CHEM TECH
Electrostatic dust collection adsorption film and production method thereof
InactiveCN105017677AExtended service lifeSave the trouble of frequent replacementPolymer sciencePolyethylene terephthalate glycol
The invention discloses an electrostatic dust collection adsorption film and a production method thereof. The film is mainly produced from, by weight, 8-25 parts of negative oxygen ion powder, 23-40 parts of polyvinyl chloride, 14-35 parts of polyethylene glycol terephthalate, 12-34 parts of active carbon nanoparticles, 14-33 parts of polycarbonate, 6-27 parts of dimethyl ammonium formate, 5-36 parts of methyl acrylate, 12-22 parts of polyacrylamide and 25-40 parts of polyethylene glycol. Compared with films in the prior art, the electrostatic dust collection adsorption film produced in the invention has the advantages of long service life, omission of the frequent replacement trouble, no obstruction to devices, and no consumption of excess energy in the dust collection process.
Owner:SUZHOU YOUJUN ENVIRONMENTAL SCI & TECH
Anti-flash-rust agent for water-based paint and preparation method thereof
ActiveCN111876006AOvercoming toxicityOvercome environmental problemsAnti-corrosive paintsPolyurea/polyurethane coatingsAdsorptive membranePhosphate
The invention discloses an anti-flash-rust agent for water-based paint and a preparation method of the anti-flash-rust agent. The anti-flash-rust agent is formed by compounding imidazoline ionic liquid, triazole ionic liquid, quaternary ammonium salt ionic liquid, organic phosphate, alkynol and deionized water according to the mass ratio of 20-60 : 20-60 : 20-60 : 4-25 : 4-25 : 1000. According tothe method, a uniform and compact adsorption film is easily formed on the metal surface, electrochemical corrosion on the metal surface is effectively prevented, and the effect of inhibiting corrosionis achieved. The anti-flash-rust agent is applied to the water-based paint, the anti-flash-rust performance is good, the use amount is small, and it can be guaranteed that rust spots do not appear onthe metal surface only by adding 0.7 to 1.2 wt% of the anti-flash-rust agent.
Owner:HUAQIAO UNIVERSITY
Composite adsorption film, preparation method and application of composite adsorption film
InactiveCN105664879AAdjustable adsorptionAdjustable mechanical strengthOther chemical processesWater contaminantsPolymer scienceMeth-
The invention provides a composite adsorption film for removing fluorine in water.The composite adsorption film is prepared from, by mass, layered magnesium-aluminum composite hydroxide, a high-molecular polymer and an organic solvent.The high-molecular polymer is preferably one of polyether sulfone, polysulfone and polyvinylidene fluoride.The organic solvent is one of N,N-dimethylacetamide, N,N-dimethylformamide and N-methyl pyrrolidone.The layered magnesium-aluminum composite hydroxide is firmly inlaid in a high-molecular basement membrane, and is not prone to fall off.The composite adsorption film is applied to high-fluorine water treatment, the fluorine content can be reduced to 1 mg / L or below, and the national hygienic standard for drinking water is met.The preparation process is simple, the composite adsorption film can be machined into a film device according to needs, and industrial application can be achieved.
Owner:OCEAN UNIV OF CHINA
Adsorption film material containing traditional Chinese medicine and preparation method thereof
InactiveCN1634608AIncrease loading capacityStrong killing of pathogenic microorganismsBiocideAbsorbent padsFilm materialMembrane configuration
The invention relates to an antibiotic and antivirus sanitary protecting material and its preparating method, in particular to a Chinese medicine contained absorptive membrane material and its preparing method. The material is composed of membrane material and Chinese medicine active part extractive absorbed on the membrane material. It is prepared by fiber membrane absorbing and carrying method. The material has a considerable strong pathogenic microbe killing function and favorable mechanical property.
Owner:LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Systems and methods for quantitative analyte transfer
InactiveUS20100032296A1Raise transfer toReduces blow throughSludge treatmentLayered productsNitrocelluloseQuantitative assay
Systems and methods for enhancing quantitative transfer of analytes to an adsorptive substrate are provided. A preferred embodiment provides an improved transfer system and method that reduces “blow through” of low molecular weight analytes and increases the adsorption of low molecular weight, for example proteins of about 30 kDa or less compared to conventional transfer techniques. It has been discovered that using a secondary porous backing membrane in conjunction with an adsorptive membrane such as nitrocellulose or polvinylidene fluoride increases the efficiency of analyte interaction with the adsorption membrane compared to transfers techniques using the adsorption membrane without the secondary backing membrane. This improvement of quantitative analyte transfer efficiency facilitates a wider range of detection processes, such as direct analysis by MALDI mass spectrometry than in earlier applications of the process without the secondary backing membrane.
Owner:PROTEIN FOREST
Electroplating CBN grinding wheel for efficient and precise gear profile grinding and manufacturing method of electroplating CBN grinding wheel for efficient and precise gear profile grinding
ActiveCN103878705AImprove mass distributionIncrease limit speedBonded abrasive wheelsIsosceles trapezoidAdsorptive membrane
The invention relates to an electroplating CBN grinding wheel for efficient and precise gear profile grinding. The electroplating CBN grinding wheel comprises a dish-shaped base body and a material grinding area at the edge of the dish-shaped base body, the mass of the material grinding area is 4%-15% of the total mass of the base body, the cross-section of a material grinding layer on the material grinding area is in an isosceles trapezoid shape, and the upper bottom and the two lateral edges are chamfered. A manufacturing method of the electroplating CBN grinding wheel includes the steps of firstly machining the base body of the grinding wheel, and then sequentially conducting negative and positive pole alternative electrochemistry oil removing, clamp and electrostatic adsorption film insulation assembling, negative and positive pole alternative electrolytic treatment, ballistic method preplating, grinding material assembling, thickening and grinding wheel electroplating on the base body of the grinding wheel. The using linear velocity of the electroplating CBN grinding wheel can achieve 250 m / s, and the grinding feeding amount achieves 4 m / min-10 m / min and is much higher than that of a common grinding wheel. The roughness Ra can achieve 0.4 micrometers, the surface quality requirement of a workpiece can be met, and gear efficient and precise gear profile grinding can be successfully achieved.
Owner:ZHENGZHOU RES INST FOR ABRASIVES & GRINDING CO LTD
Lubricant for drilling fluid and preparation method thereof
The invention discloses lubricant for drilling fluid and a preparation method thereof. The method comprises the steps as follows: firstly adding 70 to 90 parts of solid graphite into a crusher, ensuring that the solid graphite is machined into 200 mesh graphite fine powder, then shifting the graphite fine powder into a container with a stirrer, stirring and adding 10 to 30 parts of nonyl phenol ether into the container, ensuring that the nonyl phenol ether and the graphite fine powder are sufficiently mixed, and finally performing weighing and packaging through a packaging machine. After being added into drilling fluid, the lubricant can form a layer of firm adsorption film on surfaces of a drill, a drilling tool and other tools, can greatly reduce the wear of the drilling toll during the drilling process, does not has fluorescence, and does not interfere geological logging.
Owner:河南海洋化工科技股份有限公司
Method for passively monitoring antibiotic content in aquaculture water body in situ
PendingCN110702802AStable structureHigh porosityComponent separationPreparing sample for investigationAdsorptive membraneMicrobiology
The invention discloses a method for passively monitoring antibiotic content in an aquaculture water body in situ. XDA-1 resin is used as an adsorption membrane material and agarose gel is used as a diffusion membrane material. An obtained adsorption membrane, a diffusion membrane, and a round polyether sulfone filtering membrane are assembled as a DGT apparatus, and the apparatus is used to adsorb antibiotics in the aquaculture water body and monitor a concentration of the antibiotics. A XDA-1 resin material has a stable structure, high porosity, a large specific surface area, and a large adsorption capacity, has a good adsorption effect on the antibiotics in the aquaculture water body, requires a short time, has an accurate monitoring result, compensates for shortcomings of discontinuityand a relatively large error in concentration monitoring of an instantaneous active sampling method, is applicable to monitoring of low-concentration antibiotics in an aquaculture water body with anactual ambient temperature of 15 DEG C to 25 DEG C on the spot, may be widely promoted, and solves problems such as a long consumed time, a complex process, and high costs in a conventional method formonitoring an antibiotic concentration in the aquaculture water body.
Owner:SHANGHAI OCEAN UNIV
Preparation method of soluble inorganic phosphorus and arsenic adsorption membrane
InactiveCN107930608AExtended sampling timeLarge adsorption capacityOther chemical processesSolubilityGlass sheet
The invention discloses a preparation method of a soluble inorganic phosphorus and arsenic adsorption membrane. According to the preparation method of the adsorption membrane, cerium oxide nanoparticles are dispersed in an acrylamide solution, and acrylamide polymerization reaction is carried out to fix the nanoparticles uniformly in polyacrylamide gel. The preparation steps include: dispersing cerium oxide nanoparticles into the acrylamide solution, adding ammonium persulfate and tetramethylethylenediamine, mixing the substances evenly, then injecting the mixture into a two-glass plate gap clamping a U-shaped sheet, conducting horizontal placement at room temperature for 30min, then opening the glass plates and taking out a gel membrane, soaking the gel membrane in deionized water for 24hto remove unreacted reagent, cutting the gel membrane to a circle with a diameter of 2.5cm to make the adsorption membrane. The preparation method of the adsorption membrane provided by the inventionhas the characteristics of simple operation and good repeatability. The adsorption membrane has large adsorption capacity and good selectivity on soluble inorganic phosphorus and arsenic, can be preserved for a long time in a solution, and has broad application prospect in the fields of analytical chemistry and environmental analysis.
Owner:DALIAN UNIV OF TECH
Adsorption membranes, method of producing same and equipment, including the adsorption membranes
ActiveUS7223342B2Easy to separateSmall sizeSolid sorbent liquid separationLaboratory glasswaresSilica particleSorbent
Owner:SARTORIUS STEDIM BIOTECH GMBH
DGT adsorption film, preparation method and method for monitoring perfluoro and polyfluoro compounds based on DGT technology
InactiveCN111659358AThe accuracy of monitoring accuracy is reducedReduced monitoring accuracyComponent separationOther chemical processesAdsorptive membraneOrganic chemistry
The invention belongs to the field of compound monitoring, and discloses a DGT adsorption film, a preparation method and a method for monitoring perfluorinated and polyfluorinated compounds based on aDGT technology. The method comprises the following steps: (1) mixing agar powder, activated WAX resin particles and pure water according to a certain mass ratio, uniformly shaking, and heating untilthe mixture is boiled to be transparent so as to obtain an agarose solution of WAX resin; and (2) preparing an adsorption film by utilizing the agarose solution of the WAX resin, wherein the adsorption film contains WAX resin, and WAX resin particles are uniformly distributed in a film matrix. The perfluoro and polyfluoro compounds are monitored by using a DGT device containing a WAX adsorption film, the adsorption film is eluted by using an eluent to obtain an eluent after the monitoring is finished, and the concentrations of the perfluoro and polyfluoro compounds in the eluent are measured.The method can realize accurate monitoring of perfluoro and polyfluoro compounds, does not need to collect a large number of samples, and significantly reduces the monitoring cost.
Owner:NANJING UNIV
Flexible electrostatic adsorption end effector
InactiveCN106272499AGuaranteed stabilityEnsure safetyGripping headsAdsorptive membraneStructural engineering
The invention discloses a flexible electrostatic adsorption end effector, which comprises a limit and guide cylinder, a lifting plate and at least two electrostatic adsorption diaphragms, wherein the lifting plate is in sliding fit with the inner part of the limit and guide cylinder in a way that the lifting plate can be driven to move up and down, and the electrostatic adsorption diaphragms are arranged along the circumference of the lifting plate; when the lifting plate slides upward along the limit and guide cylinder, the electrostatic adsorption diaphragms retract into the limit and guide cylinder, and wrap and cling to an object; when a workpiece needs to be clamped, the lifting plate is driven to move upward along the inner part of the limit and guide cylinder, so that the electrostatic adsorption diaphragms are driven to retract into the limit and guide cylinder, consequently, the electrostatic adsorption diaphragms can wrap the object to be adsorbed, and each electrostatic adsorption film is then electrified and generates static electricity, and thereby clings to the surface of the object to grab the object. The flexible electrostatic adsorption end effector is easy to implement and simple to operate, moreover, the plurality of electrostatic adsorption films arranged along the circumference of the lifting plate can effectively adsorb and clamp the object to be adsorbed, and thereby the stability and safety of operation are guaranteed.
Owner:CHONGQING UNIV
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