21 results about "Perfluorooctane" patented technology

The invention discloses a creatinine detection device, and belongs to the field of in-vitro diagnosis equipment. The creatinine detection device comprises a substrate, a reagent 1 assembly and a reagent 2 assembly, the reagent 1 assembly comprises a flow pad, an enzyme pad and a blood filter membrane, the reagent 2 assembly comprises a start inhibition layer, a separation layer and a color development layer, the reagent 1 assembly and the reagent 2 assembly are stored in a non-contact mode in a normal state, and the reagent 1 assembly and the reagent 2 assembly are in contact to start a reaction during testing; the separation layer contains perfluorooctane sulfonic acid and / or perfluorooctane carboxylic acid. According to the creatinine detection device provided by the invention, interference of endogenous ammonia can be eliminated, the diffusivity of the ammonia is improved, and the detection sensitivity is improved.

The application discloses an anti-oil stain photovoltaic panel self-cleaning paint and a preparation method thereof. The paint comprises the following components in parts by weight: 17-20 parts of hollow nano titanium dioxide, 5-7 parts of sodium perfluorooctane sulfonate, wherein the hollow nano titanium dioxide is hollow anatase nano titanium dioxide formed by removing the silica core after coating the silica on the outer surface of the hollow nano titanium dioxide, and the hollow nano titanium dioxide contains an oil stain degrading agent. The paint has the dual effects of hydrophilicity and oil repellency and oil stain degradation, greatly improves the cleaning effect, reduces the cleaning cost, and also has excellent stability.

This invention provides a set of metabolic biomarkers for assessing perfluorooctane sulfonate (PFOS) exposure levels and their applications, belonging to the field of organic pollutant poisoning detection technology. Utilizing plasma sample metabolomics data and machine learning algorithms, this invention successfully constructs a discriminant model capable of accurately distinguishing between high PFOS exposure (above 20 ng / mL) and low exposure (not exceeding 20 ng / mL). This method is simple to operate, non-invasive, and the sample collection process is quick and easy, making it particularly suitable for large-scale PFOS high exposure risk screening in populations. It eliminates the need for PFOS standards, avoiding potential contamination risks.

A method for degradation of perfluorooctane sulfonate (PFOS), in which a PFOS-containing sample is mixed with a catalyst to give a mixture, and the mixture is subjected to pyrolysis reaction at 300-700° C. under an inert atmosphere in a pyrolysis reactor, where the generated gaseous products are monitored and analyzed in real time through an online pyrolysis-gas chromatograph-mass spectrometer. A system is also provided for performing such method, including a mixing unit, a pyrolysis reactor, a control unit, a gas supply unit and the online pyrolysis gas-chromatography-mass spectrometer.

The present application relates to the technical field of PFOS-containing fire-fighting foam decomposition, and particularly relates to a PFOS-containing fire-fighting foam decomposition device and method, which comprises a magnetization device, a heating furnace and a wet absorption device. The magnetization device is used to reduce the molecular force of perfluorooctane sulfonamide molecules in the PFOS-containing fire-fighting foam through the magnetic field thereof. The heating furnace is connected to the magnetization device and used to perform thermal decomposition treatment on the PFOS-containing fire-fighting foam treated by the magnetization device. The wet absorption device is connected to the exhaust outlet of the heating furnace and used to absorb the perfluorocarbon gas generated by the thermal decomposition of the PFOS-containing fire-fighting foam. The present application can improve the degradation rate and degradation efficiency of PFOS in the PFOS-containing fire-fighting foam, and can also reduce the degradation time and energy consumption.

The invention provides a compound surface treatment coupling agent of a powder inorganic flame retardant, which comprises the following components in parts by mass: 15-30 parts of a modified silane coupling agent, 8-18 parts of a composite anionic surfactant, 3-10 parts of a multifunctional antioxidant stabilizer and 20-40 parts of a high-flash-point carrier solvent. The problem of high-temperature volatilization is solved through synergism of a high-flash-point carrier solvent hydrogenated castor oil and an epoxy-group-modified modified silane coupling agent, and uniform dispersion and complete coating of the flame retardant are realized by using a sodium dodecyl benzene sulfonate / potassium perfluorooctane sulfonate composite anionic surfactant system; the long-acting thermal oxidation stability is improved by virtue of a hindered phenol / phosphite composite antioxidant stabilizer, and meanwhile, the technical problems of processing volatilization, dispersion agglomeration and oxidative degradation are solved.

This invention provides a high-temperature stable fluorinated carbon oil displacement surfactant and its preparation method, belonging to the field of surfactant technology. This application constructs a triazine fluorinated surfactant: First, 1H,1H,2H,2H-perfluorooctane-1-ol is used in the presence of anhydrous potassium carbonate to generate a fluorinated alkoxy anion, which forms a C-O bond with cyanuric chloride, introducing a fluorinated hydrophobic arm; then, sodium N-methyltaurate is introduced to N-substitute the unsubstituted chlorine position, introducing a sulfonate hydrophilic head group, obtaining an intermediate of a fluorinated hydrophobic arm and a taurine hydrophilic arm; then, oleylamine is used to replace the remaining chlorine position, introducing a long-chain hydrocarbon hydrophobic arm, forming a surfactant mixture with an O-N-N triazine structure consisting of a "fluorinated alkoxy arm-taurine hydrophilic arm-oleylamine hydrocarbon arm"; after solvent removal and addition to an ethylene glycol monobutyl ether / water co-solvent system, a stable oil displacement surfactant that is easy to prepare and use on-site is obtained.

The invention discloses a white peroxidase simulant manganese-based metal organic framework (Mn-MOF) as well as a preparation method and application thereof, and belongs to the technical field of nano materials and detection. The Mn-MOF is prepared by reacting manganese acetate tetrahydrate with 1, 3, 5-benzene tricarboxylic acid in an ethanol-water mixed system, is of a white three-dimensional microsphere structure, and has excellent simulated peroxidase activity. The perfluorooctane sulfonate can catalyze H2O2-mediated TMB chromogenic reaction, and perfluorooctane sulfonate (PFOS) can inhibit the catalytic activity of the perfluorooctane sulfonate (PFOS) through multiple interactions, so that the blue color of the solution becomes light. The change of absorbance is detected by using an ultraviolet spectrophotometer, or a color developing image is converted into an RGB value through a smart phone and an R / B ratio is calculated, so that high-selectivity, visual and rapid detection of the PFOS can be realized. The method does not need complex pretreatment, is simple and convenient to operate and low in cost, has the detection limit as low as 53.3 nM, and is suitable for quantitative analysis of PFOS in a field environment water sample.

The application discloses a kind of MIP / WS2-AC@Cu-MOF-199 modified glassy carbon electrode and its preparation method and electrochemical sensing detection perfluorooctane method, with MIP / WS2-AC@Cu-MOF-199 modified glassy carbon electrode as working electrode, Ag / AgCl electrode as reference electrode, platinum as auxiliary electrode, potassium ferricyanide / potassium ferrocyanide as charged probe molecule, and water PFOA is detected quickly using differential pulse voltammetry.The application will tungsten sulfide-activated carbon (WS2-AC) and Cu-MOF (199) are simply modified by ball milling, to strengthen the conductivity of original Cu-MOF material, to establish a simple and low-cost electrochemical sensing detection method.This method has simple detection, raw material source is extensive, and the method can effectively detect PFOA in a wide range and maintain good sensitivity.The application provides a kind of water perfluorooctane sensing detection method based on electrochemistry using MOF material, and has good application prospect.

The application discloses a kind of radiation-resistant sealing materials for photoetching process and preparation method thereof, belong to high molecular sealing material technical field.The material is made of fluorine rubber raw rubber, 1-iodine perfluorohexane or 1-iodine perfluorooctane, reinforcing filler, bisphenol AF vulcanizing agent and benzyl triphenyl phosphonium chloride accelerator, etc.According to specific weight part, it is made by batch dropwise mixing and gradual temperature two-step vulcanization.The application utilizes perfluoroalkyl iodide under plasma C-I bond preferentially homolysis generates I·, terminates fluorine rubber free radical chain degradation;And through theoretical calculation and ion chromatography verification, ensure that processing process does not decompose, no corrosive iodine ion release in service.The application breaks the application technology prejudice of halogen, solves the defect that conventional fluorine rubber particle releases high, plasma life is short, avoids the problem that perfluoroether rubber is high in cost and difficult to process, the obtained material is low in particle release amount, long in radiation life, small in compression permanent deformation, adapts to 7nm and below node semiconductor equipment sealing demand, easy to scale up.

The application discloses a method for detecting the content of perfluorinated and polyfluorinated compounds in textiles, and specifically comprises the following steps: reagent preparation, sample preparation, extraction of an extraction solution by an extraction device, rotary evaporation, nitrogen blowing, acetonitrile constant volume, filtration, and then obtaining a to-be-detected extraction solution; the to-be-detected extraction solution is detected by gas chromatography-mass spectrometry, so that the content of perfluorinated and polyfluorinated compounds in the to-be-detected sample is obtained. The detection method can realize one-time extraction and simultaneous analysis of 12 kinds of perfluorinated and polyfluorinated compounds including 4 fluorinated telomer alcohols, 3 fluorinated acrylates and 5 perfluorooctane sulfonamide compounds, is suitable for rapid detection of a large number of samples, and has the advantages of rapidness, low cost, high sensitivity, convenient operation, extraction efficiency of more than 95%, suitability for screening of textile complex matrix materials, filling of the deficiency of the existing method in simultaneous extraction of multiple types of PFASs in textiles, and good practicability and popularization value.

The invention relates to the technical field of environmental monitoring, and discloses a method and a system for detecting perfluorooctane sulfonic acid in water. The method comprises the following steps: exciting a fluorocarbon bond vibration mode of perfluorooctane sulfonate molecules in a water sample to be detected by using laser with a specific wavelength, inducing nonlinear transition of instantaneous refractive indexes of the molecules, and obtaining a preliminary optical response signal sequence; extracting a matrix scattering background light intensity fluctuation range and a peak-valley contrast ratio of the signal sequence, and determining a transition amplitude enhancement threshold; when the threshold value exceeds the background range, capturing an instantaneous transition image and processing the instantaneous transition image to obtain a multi-frame difference signal sequence; extracting sequence characteristic parameters, matching the sequence characteristic parameters with a preset response mode, and determining molecular aggregation state configuration characteristics; and through multi-wavelength spectrum fusion verification, ecological threat assessment and signal enhancement processing, a trace concentration quantitative result is obtained. According to the invention, through laser targeting excitation and multi-dimensional feature fusion, the problems of weak trace detection signal, large interference and poor specificity in a complex matrix are solved, and the detection sensitivity and accuracy are improved.

The application discloses a creatinine detection device and belongs to the field of in-vitro diagnosis equipment. The creatinine detection device comprises a substrate, a reagent 1 component and a reagent 2 component. The reagent 1 component comprises a flow pad, an enzyme pad and a blood filtration membrane. The reagent 2 component comprises a start inhibition layer, a separation layer and a chromogenic layer. The reagent 1 component and the reagent 2 component are stored in a non-contact state in a normal state, and are contacted to start a reaction in the test. The separation layer contains perfluorooctane sulfonic acid and / or perfluorooctane carboxylic acid. The creatinine detection device provided by the application can eliminate the interference of endogenous ammonia, improve the diffusion capacity of ammonia and improve the sensitivity of detection.

The application provides a high-temperature stable fluorocarbon oil displacement surfactant and a preparation method thereof, and belongs to the technical field of surfactants. A triazine fluorine-containing surfactant is constructed. First, 1H, 1H, 2H, 2H-perfluorooctane-1-alcohol is used to generate a fluorine-containing alkoxy anion under the action of anhydrous potassium carbonate, and a C-O bond is formed with cyanuric chloride to introduce a fluorine-containing hydrophobic arm. Then, N-methyl taurine sodium is introduced to perform N-substitution on the unsubstituted chlorine site, and a sulfonate hydrophilic head group is introduced to obtain a fluorine-containing hydrophobic arm and taurine sulfonate hydrophilic arm intermediate. Then, the remaining chlorine site is substituted with oleylamine to introduce a long-chain carbon and hydrogen hydrophobic arm, forming a surfactant mixture with an O-N-N triazine structure composed of a fluorine-containing alkoxy arm-taurine sulfonate hydrophilic arm-oleylamine carbon and hydrogen arm. After solvent removal and the addition of ethylene glycol monobutyl ether / water auxiliary solubilization system, an oil displacement surfactant with stable morphology and convenient on-site preparation and use is prepared.

The application discloses a kind of zirconium-based fluorescent MOF-based water perfluorooctane sulfonic acid rapid screening method, comprising the following steps: S1, zirconium-based fluorescent MOF preparation;S2, perfluorooctane sulfonic acid concentration gradient screening;S3, perfluorooctane sulfonic acid fluorescence kinetics analysis;S4, residual solid powder analysis;S5, water common ion influence analysis;S5-1, high concentration ion influence analysis;S5-2, low concentration ion influence analysis;S6, real water detection.The method of the application uses zirconium-based fluorescent MOF UiO-66-NH2 as sensor, synthesizes UiO-66-NH2 sensor by solvothermal method, and through the method of gradient concentration screening, fluorescence kinetics analysis and residual solid powder analysis of PFOS, from sensing sensitivity, speed and stability, greatly improve the accuracy of UiO-66-NH2 sensor for PFOS screening in water, provide theoretical basis and premise guarantee for the applicability of UiO-66-NH2 sensor in real water.

The invention discloses modified transformer oil and a preparation method thereof, the transformer oil is composed of insulating oil and fluoride, and the volume of the fluoride accounts for 1-5% of the volume of the modified transformer oil; the fluoride is one or a mixture of two of perfluorooctane and perfluorooctane. According to the invention, 1%-5% by volume of fluoride is added into the mineral insulating oil, so that the flash point and the ignition point can be remarkably improved, high breakdown voltage and excellent insulating property can be maintained, and the anti-explosion safety of the transformer oil is greatly enhanced; the method is simple in process and low in cost, existing transformer equipment does not need to be transformed, the defect that traditional mineral oil is inflammable and explosive is overcome, and an efficient and reliable solution is provided for safe operation of power equipment.

The invention relates to the technical field of separation membranes, and discloses a cationic nano titanium dioxide modified nanofiltration membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: blending polyether sulfone, polyethylene glycol, nano titanium dioxide and N, N-dimethylformamide to form a membrane casting solution, forming an ultrafiltration base membrane through a water coagulating bath, and then sequentially carrying out full infiltration and heat treatment in a piperazine-containing water phase and a TMC-containing organic phase to obtain the modified nanofiltration membrane. And finally, soaking in a water solution of Na < + >, Mg < 2 + > and Fe < 3 + > cations, and drying to obtain the target nanofiltration membrane. The nanofiltration membrane prepared by the invention is wide in application scene, and is suitable for efficiently removing typical PFOS (perfluorooctane sulfonate) in a concentration range (10-1000 mu g / L) from a near-neutral actual water source; non-toxic and cheap cations (Na < + > / Mg < 2 + > / Fe < 3 + >) are used, so that secondary pollution is avoided, and meanwhile, the membrane has high rejection rate and high flux; long-chain PFAS resistance specificity: a membrane structure (MWCO matching + high negative electricity + bridging) is customized aiming at molecular size, charge and hydrophobicity of PFOS (C8), and is superior to most studies focusing short-chain PFAS.

The application provides an anti-icing coating and a preparation method and application thereof, and belongs to the technical field of anti-icing coatings. The anti-icing coating is optimized, the synergistic effect of (4-perfluorooctylphenyl) triethoxysilane, hexafluorobutyl methacrylate and hexamethylene diisocyanate is utilized, the water contact angle of the anti-icing coating can be greatly improved, the hydrophobic property is improved, and good anti-icing effect is achieved; the micron-nanometer concave-convex structure is formed on the surface of the coating layer formed by the anti-icing coating by adding nanoscale hydrophobic particles, the self-cleaning effect of imitation lotus leaf is realized, the adhesion of water droplets, water mist and dirt on the surface is effectively prevented, and the occurrence of icing phenomenon is further prevented.

The invention discloses reinforced universal type degreased powder and a preparation process thereof, the reinforced universal type degreased powder comprises a basic carrier material and a functional component material, the basic carrier material comprises anhydrous sodium sulfate and sodium bicarbonate, and the functional component material comprises a surface active material, an enzymolysis degreasing material, an alkaline slow-release material, an oxidation carbon deposition treatment material and an auxiliary additive, the surface active material is prepared from rhamnolipid, APG (alkyl polyglucoside), PFBS (perfluorooctane sulfonate), polyether modified trisiloxane, cocamidopropyl betaine and polyoxyethylene lauryl ether. The whole degreasing powder can achieve targeted cracking of the pain point that stubborn oil stains are difficult to decompose, raw materials for sensitive characteristics of aluminum alloy / titanium alloy are optimized, and the degreasing powder which is thorough in stubborn oil stain degreasing, free of damage to sensitive materials, stable in long-term storage, environmentally friendly and compliant is achieved; through the preparation process of double-enzyme coating, silicon-based cooperation and double-cavity isolation, an efficient, safe and stable brand-new solution is provided for degreasing of the metal precision component.

The invention belongs to the technical field of detection and analysis, and particularly relates to a colloidal gold test strip and kit for quantitatively detecting perfluorooctane sulfonic acid (FPOS) in water and a use method of the colloidal gold test strip and kit. The colloidal gold test strip and the kit based on the special monoclonal antibody are innovatively researched and developed, the monoclonal antibody has a unique gene sequence, and the detection sensitivity of PFOS is remarkably improved. When the test strip is used, a sample to be detected only needs to be dropwise added on the sample pad of the test strip, the sample moves towards the water absorption pad under the capillary action, and the sample interacts with a colloidal gold marker when flowing through the colloidal gold pad. Compared with traditional instrument detection, the colloidal gold immunochromatography technology does not need professional operation and complex equipment, the detection process is simple, convenient and rapid, high sensitivity is kept, the content detection of PFOS in water can be rapidly completed on site, and the method is suitable for large-scale popularization and application. And an efficient and practical new scheme is provided for public health emergency event monitoring, pollutant environment risk assessment and management, food safety supervision and enterprise self-inspection.