41 results about "Perfluorooctane" patented technology

The invention belongs to the technical field of polymer composite materials, and particularly relates to a high-strength corrosion-resistant ABS composite flame-retardant material and a preparation method thereof. The ABS composite flame retardant material is prepared from the following raw materials in parts by weight: 60 to 75 parts of acrylonitrile-butadiene-styrene, 10 to 15 parts of glass fiber, 0.5 to 1 part of gamma-aminopropyltriethoxysilane, 8 to 12 parts of phosphorus-nitrogen flame retardant, 1 to 3 parts of nano aluminum oxide, 0.5 to 1 part of potassium perfluorooctane sulfonate, 1 to 3 parts of epoxy modified graphene oxide and 5 to 8 parts of modified nano montmorillonite. Through the synergistic effect of the epoxy silane modified graphene oxide and the long-chain alkylsilane modified nano montmorillonite, the mechanical property, the corrosion resistance and the flame retardant effect of an ABS matrix are remarkably enhanced. The modified material maintains toughness under high strength, effectively avoids embrittlement, and shows excellent impact resistance and environmental protection property.

The invention discloses an electrolyte composition, application thereof and a lithium ion battery. The electrolyte composition comprises a first electrolyte and a second electrolyte, the first electrolyte comprises a base solution, vinylene carbonate, methylene methanedisulfonate, ammonium perfluorooctane sulfonate and 1, 3, 6-hexane trinitrile, and the second electrolyte comprises a base solution, vinylene carbonate and fluoroethylene carbonate, the basic solution is a mixed solvent in which lithium salt is dissolved, and the mixed solvent comprises at least two of ethylene carbonate, propylene carbonate and diethyl carbonate. The electrolyte composition can be applied to preparation of a lithium ion battery for supplementing lithium. The invention also discloses a lithium ion battery comprising the electrolyte composition, a positive pole piece containing a lithium supplement agent, a negative pole piece containing a lithium supplement agent and a diaphragm. According to the electrolyte composition, the lithium supplement agent can play a better lithium supplement role, the 45 DEG C cycle performance of the lithium supplement battery is obviously improved, and the 45 DEG C cycle capacity is kept at 94% or above.

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 invention belongs to the technical field of fire extinguishing agents, and particularly relates to an environment-friendly foam fire extinguishing agent based on a hydrocarbon / organic silicon compound system and a preparation method of the environment-friendly foam fire extinguishing agent. The fire extinguishing agent comprises the following components in percentage by mass: 4%-8% of dodecyl glycoside APG0810, 7%-10% of cocamidopropyl betaine CAB, 3%-5% of an organosilicon surfactant Dow Corning OFX-5211, 0.2%-0.5% of nano boron nitride, 0.2%-0.4% of xanthan gum, 1%-4% of a cosolvent, 3%-10% of an antifreeze agent and the balance of water. The total amount of the dodecyl glycoside APG0810 and the cocamidopropyl betaine is not less than 13%. The environment-friendly foam extinguishing agent does not contain perfluorooctane sulfonate and perfluorooctanoic acid which are difficult to degrade, has good stability, and is simple in preparation process, low in preparation cost and suitable for extinguishing B-type oil liquid fire disasters.

The invention discloses a method for evaluating the environmental risk of perfluorooctane sulfonic acid by using euglena gracilis, and belongs to the field of environmental pollutant biological monitoring and ecotoxicology evaluation. The method comprises the following steps: detecting the photosynthetic activity and the movement ability of Euglena gracilis exposed to perfluorooctane sulfonic acid with environmental concentration and the organelle distribution condition of the perfluorooctane sulfonic acid in euglena gracilis cells in situ; the photosynthetic activity comprises in-situ monitoring of chlorophyll fluorescence parameters and maximum non-photochemical quenching coefficient of euglena gracilis, and quantitative analysis of chloroplast pigment content; the movement ability comprises horizontal light-driving movement speed and vertical light-driving movement speed measurement of the euglena gracilis and flagellum shedding rate calculation. The method breaks through the limitation of a traditional single autotrophic mode, reveals a regulation and control mechanism of nutritional conditions on toxic effects, provides a scientific basis for water environment safety monitoring and optimization, and has the advantages of being convenient to operate and low in cost.

The invention discloses an oil-stain-resistant photovoltaic panel self-cleaning coating and a preparation method thereof, the oil-stain-resistant photovoltaic panel self-cleaning coating comprises the following components in parts by weight: 17-20 parts of hollow nano titanium dioxide and 5-7 parts of sodium perfluorooctane sulfonate, and the hollow nano titanium dioxide is prepared by coating the outer surface of silicon dioxide with the hollow nano titanium dioxide and then coating the hollow nano titanium dioxide with the sodium perfluorooctane sulfonate. And removing hollow anatase nano titanium dioxide formed by the silicon dioxide core, wherein the hollow nano titanium dioxide contains an oil stain degradation agent. The coating disclosed by the invention has double effects of hydrophilicity, oleophobicity and oil stain degradation, the cleaning effect is greatly improved, the cleaning cost is reduced, and excellent stability is also shown.

The invention discloses a two-component polyurethane heat-conducting structural adhesive and a preparation method thereof, and relates to the technical field of polyurethane heat-conducting structural adhesives. The coating comprises a component A and a component B, the component A is prepared from the following components in parts by mass: 40 to 50 parts of modified polycarbonate polyol, 30 to 40 parts of modified polyether polyol, 15 to 25 parts of modified aluminum oxide filler and 1 to 3 parts of silane coupling agent; the modified polycarbonate polyol is obtained by adding 2-sulfonic terephthalic acid and a first catalyst into polycarbonate polyol; the modified polyether polyol is obtained by adding 3-phenylpropionic acid p-nitrophenyl ester and a second catalyst into polyether polyol; the modified aluminum oxide filler is obtained by adding an aluminum oxide filler into potassium perfluorooctane sulfonate; the component B is prepared from the following components in parts by mass: 20 to 30 parts of diphenylmethane diisocyanate, 40 to 50 parts of modified polycarbonate polyol, 1 to 3 parts of a dewatering agent and 20 to 30 parts of modified aluminum oxide filler. The two-component polyurethane heat-conducting structural adhesive prepared by the invention has better flexibility and impact resistance, and the stability of the two-component polyurethane heat-conducting structural adhesive 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.

The invention discloses application of glucoraphanin to preparation of a product for reducing biological accumulation of perfluorooctane sulfonate, and belongs to the technical field of biological medicine. The occurrence probability of the high PFOS level in the body of a participant frequently eating broccoli is confirmed to be remarkably reduced through population epidemiological experiments, and then the PFOS level in the body of the participant is confirmed to be remarkably reduced after glucoraphanin intervention through clinical RCT random control experiments. The glucoraphanin-intervened serum has the advantages that the glucoraphanin-intervened serum is used as a main body, the metabolic change of steroid, ceramide and bile acid in the glucoraphanin-intervened serum is confirmed to be closely related to the reduction of the PFOS level through lipidomics analysis, and finally, the glucoraphanin is confirmed to be capable of effectively reducing the PFOS in-vivo accumulation and improving the liver injury caused by the PFOS through animal experiments and an AI reverse targeting technology; and the glucoraphanin and the in-vivo metabolite sulforaphane thereof have relatively strong binding capacity with a liver-specific PXR receptor, so that a good technical foundation is laid for research and development of drugs for treating diseases related to PFOS accumulation.

The invention belongs to the technical field of ultrasonic imaging agents, and particularly relates to an ultrasonic contrast agent with low side effects, a preparation method and application. The ultrasonic contrast agent with low side effect provided by the invention is prepared from perfluorooctane, phospholipid, cholesterol, 0 cocamidopropyl amine oxide and dithiothreitol. Experimental data show that after being injected with the ultrasonic contrast agent, rats do not die and basically do not have toxic or side effect symptoms, after anatomy, visceral organs do not have obvious pathological changes, and the acute toxicity of the ultrasonic contrast agent is low.

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 invention provides a method and system for predicting the annual discharge amount of perfluorooctane sulfonate in tail water of sewage and a medium, and the method comprises the following steps: obtaining basic data which comprises the monitored concentration of perfluorooctane sulfonate in tail water of urban resident sewage treatment plants and daily sewage treatment capacity data of the urban resident sewage treatment plants; calculating the annual discharge amount of perfluorooctane sulfonate in the tail water of the urban sewage treatment plant based on the basic data; performing multivariate correlation fitting on the basis of the annual discharge amount of the perfluorooctane sulfonate in the tail water of the urban sewage treatment plant and the target parameters to obtain a fitting relationship; and obtaining prediction data of the target parameters, and predicting the annual discharge amount of the perfluorooctane sulfonate in the tail water of the urban sewage treatment plant by combining the fitting relationship. According to the method and system for predicting the annual discharge amount of the perfluorooctane sulfonate in the sewage tail water and the medium, optimization suggestions can be intelligently provided for environmental management and control measures of all cities under the condition of ensuring that the concentration of the perfluorooctane sulfonate in the tail water reaches the standard, so that the environmental restoration efficiency is improved.

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.

The present invention belongs to the field of environmental and food pollution detection, and relates to a trimodal detection method for perfluorooctane sulfonic acid based on cobalt-doped carbon dot nanozymes. The present invention uses citric acid and ethylenediamine as synthetic raw materials, and synthesizes a blue fluorescent nanozyme with peroxidase activity in one step by a one-pot hydrothermal method. After washing, centrifugation, freeze-drying, and finally dissolving in deionized water, a cobalt-doped carbon dot fluorescent nanozyme with peroxidase activity is obtained. The cobalt-doped carbon dot fluorescent nanozyme synthesized by this method has good water solubility, extremely small nanometer size and excellent blue fluorescence performance, and its peroxidase activity can be used to establish a method for rapid simultaneous determination of PFOS by fluorescence, colorimetry and photothermal trimodality, with a detection limit as low as 0.028μmol / L.

The present invention discloses a cobalt and fluorine single-atom co-doped carbon nanotube material prepared by microwave radiation and its application. The material is prepared by the following method: Step 1: uniformly mixing carbon nanotubes and cobalt chloride to obtain a mixture; adding perfluorooctane to the mixture; and ultrasonically treating the mixture to uniformly disperse the mixture in the perfluorooctane to obtain a uniformly dispersed solution; Step 2: treating the uniformly dispersed solution obtained in Step 1 with microwave radiation to obtain a precursor material; and Step 3: washing the precursor material obtained in Step 2 and drying it to obtain a cobalt and fluorine single-atom co-doped carbon nanotube material. The material prepared by this method has high cobalt and fluorine doping rates, is relatively easy to effectively dope with cobalt single atoms, and exhibits excellent electrochemical properties.

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 relates to a wear-resistant and corrosion-resistant PVC (polyvinyl chloride) plastic and a preparation process thereof, and belongs to the technical field of plastic preparation, the PVC plastic comprises the following raw materials: polyvinyl chloride resin, hexagonal boron nitride, isopropyl tri (dioctyl pyrophosphate acyloxy) titanate, liquid nitrile rubber, perfluorooctane, di-n-octyl phthalate, 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1, 3, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 1, 3, the plastic is prepared from 1, 2-diisononyl terephthalate, polyethylene wax and zinc stearate. The hexagonal boron nitride, the isopropyl tri (dioctyl pyrophosphate acyloxy) titanate and the liquid nitrile rubber are added into the raw materials, so that the prepared PVC finished product has excellent corrosion resistance; by adding perfluorooctane, perfluorooctane with lower surface energy and better lubricity is grafted on the surface of a polyvinyl chloride resin molecular chain, so that the surface resistance of a finished product is reduced, and the flexibility is improved; meanwhile, di-n-octyl phthalate is added, so that the surface friction coefficient of the finished product is reduced, abrasion is reduced, and the finished product has excellent abrasion resistance.

Disclosed is a method of irradiating a composition having water and hydrogen-terminated nanodiamonds with light that generates water-solvated electrons from the nanodiamonds. The method can be used to degrade fluoroalkyl compounds such as perfluorooctane sulfonate.

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 invention discloses a polymer antifouling coating as well as a preparation method and application thereof. The method comprises the steps of surface cleaning, preparation of a monomer solution, addition of a cross-linking agent and a photoinitiator, degassing treatment, spraying, ultraviolet irradiation, leaching, surface modification, drying and the like. According to the preparation method, ethylene glycol diacrylate (EGDA) and 2, 2-dimethoxy-2-phenylacetylbenzophenone (DMPAP) are used as a cross-linking agent and a photoinitiator, and trifluoroethanol (TFE) and perfluorooctane (PFO) are combined as solvents, so that a polymer coating with excellent antifouling performance can be prepared. After the coating is subjected to plasma treatment and chemical modification, the adhesive force and the antifouling effect can be remarkably improved, and the coating is suitable for steel plate protection in the marine environment. The application of the novel polymer antifouling coating is not limited to improvement of the antifouling performance of marine facilities, but also can be expanded to a plurality of high-tech fields such as medical health, environmental monitoring, energy production and military defense.

The invention discloses a method for continuously producing trans-dichloroethylene by using a two-phase solvent system, which comprises the following steps: contacting perfluoro-n-octane dissolved with chlorine with acetonitrile dissolved with acetylene, controlling the reaction temperature at 60-90 DEG C, and irradiating by using ultraviolet light with the wavelength of 200-400nm to initiate free radical addition reaction, so that the chlorine reacts with acetylene to generate trans-1, 3-dichloroethylene. 2, 2-dichloroethylene; the method has the advantages of simple process, mild reaction conditions, recyclable reaction solvent, high product selectivity and reaction controllability, and safe and efficient experimental operation process; the selectivity of a target product is effectively improved.

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 invention discloses a bifunctional monomer synergistic molecularly imprinted electrochemical sensor and a preparation method and application thereof, the preparation method comprises the following steps: polishing a glassy carbon electrode, and cleaning for later use after polishing; the method comprises the following steps: preparing an electrochemical polymerization solution of o-phenylenediamine (o-PD), 3, 4-diaminotoluene (3, 4-DAT) and perfluorooctane sulfonate, and taking a mixed solvent of a 0.1 M acetate buffer solution and methanol as a solvent; taking the pretreated glassy carbon electrode as a working electrode, putting a three-electrode system into an electrochemical polymerization solution, and performing electrochemical polymerization on molecularly imprinted poly-o-phenylenediamine and 3, 4-diaminotoluene by using a cyclic voltammetry to obtain a modified electrode; and cleaning the modified electrode to obtain the electrode. The electrochemical sensor has high sensitivity, excellent reproducibility, good stability and good recovery rate, and can rapidly detect perfluorooctane sulfonate in the environment with high sensitivity.

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 invention discloses a pipeline and a method for degrading PFOS (Perfluorooctane Sulfonate) by utilizing mechanical energy of water flow. The PFOS degradation pipeline comprises a pipeline main body and a composite piezoelectric layer loaded on the inner wall of the pipeline main body. The composite piezoelectric layer is formed by doping a semiconductor nano piezoelectric material in a piezoelectric matrix material; the semiconductor nano piezoelectric material is driven by water flow mechanical energy to generate redox active species by using water; the piezoelectric base material has selective adsorbability, so that low-concentration PFOS in water is enriched on the surface of the material. According to the invention, abundant water flow mechanical energy in a pipeline is utilized to drive piezoelectric catalysis, the catalytic activity of the material is regulated and controlled through double piezoelectric coupling and an interface effect, an in-situ, low-energy-consumption and defluorination degradation method for PFOS in water is constructed, additional energy input and additional medicaments are not needed, the development direction of a water treatment technology is met, and the energy-saving characteristic is distinct.