203 results about "Brominated Diphenyl Ethers" patented technology

The invention discloses a method for rapidly detecting polybrominated diphenyl ether residue in a sample, particularly in textiles. The method is characterized by comprising the following steps: (1) the sample is crushed, dipped in base solution and ultrasonically extracted in water bath, and solid phase microextraction is employed to concentrate a target compound; and (2) polybrominated diphenyl ether is qualitatively and quantitatively determined by gas chromatography-mass spectrometry after thermal desorption. The method helps effectively solve the problem of matrix effect that fabric fibers have no solvent extraction, obtains a satisfactory result for the analysis of a selected target compound, has the advantages of low organic solvent consumption, rapid extraction speed, less interference from impurities, high sample recovery rate and the like, and can be applicable to rapidly detecting polybrominated diphenyl ether flame retardant residue in textiles.

The invention discloses an inflaming retarding thermoplastic polyurethane elastic body which comprises the following components by weight percentage of: 60-80% of polyester thermoplastic polyurethane, 10-30% of halogen-free fire retardant, 1-10% of inflaming retarding synergist, 1-10% of chain extender, 0.1-2% of antioxidant and less than 5% of non-inflaming-retarding additive. According to the inflaming retarding thermoplastic polyurethane elastic body disclosed by the invention, the good inflaming retarding performance can be achieved and relatively good mechanical performances of previous high tensile strength, cracking elongation at break and the like of a TPU (Thermoplastic Polyurethane) raw material; the inflaming retarding thermoplastic polyurethane elastic body has the advantages of good wear resistance, tearing resistance, hydrolysis resistance and anti-ageing performance; and the inflaming retarding thermoplastic polyurethane elastic body does not contain halogens and heavy metal and particularly does not contain lead, cadmium, mercury, hexavalent chromium heavy metal, as well as poly-brominated diphenyl ether and poly-brominated biphenyls, so that the European Union RoH2.0 instruction requirements are met.

The invention relates to a pretreatment method for purifying dioxin, polychlorinated biphenyl and polybrominated diphenyl ether in extract liquor. Purifying columns which respectively comprise a compound silicagel column, an alkaline aluminium oxide column and a Florisil column are arranged on an extraction module of a full-automatic solid-phase extractor, wherein fillers in each compound silicagel column comprise the following materials from bottom to top in sequence: silica gel, alkaline silica gel, silica gel, acidic silica gel and anhydrous sodium sulfate, and an eluent is normal hexane; fillers in the alkaline aluminium oxide column comprise the following materials from bottom to top in sequence: alkaline aluminium oxide and anhydrous sodium sulfate, and an eluent is mixed liquor of normal hexane and dichloromethane; fillers in the Florisil column comprise the following materials from bottom to top in sequence: Florisil and anhydrous sodium sulfate, the eluent is divided into two types according to the sequence of the steps, the eluent in the first step is the mixed liquor of normal hexane and dichloromethane, and the eluent in the second step is dichloromethane; and among all purifying columns, the eluents are transferred to an online concentrator for evaporation and concentration, and then are transferred to the next purifying column for purifying and treating.

The invention relates to a flame retardant-type waterproof sealing hot-melt pressure-sensitive adhesive. The flame retardant-type waterproof sealing hot-melt pressure-sensitive adhesive comprises butyl rubber 268, brominated butyl rubber, polyisobutene B50, polyisobutene B12, octyl phenolic resin, thermoplastic elastomer SBS (Styrene Butadiene Styrene), mineral oil, deca-brominated diphenyl ether, antimonous oxide, aluminium hydroxide, zinc oxide, an antioxidant 1010 and carbon black. The hot-melt pressure-sensitive adhesive with high flame retardant property is obtained by selecting the resin with very good waterproof sealing property and the rubber system in combination with a flame retardant with the excellent synergistic flame retardant property according to a formula system while the waterproof sealing property and the bonding strength of the hot-melt pressure-sensitive adhesive are ensured. The prepared pressure-sensitive adhesive has very high bonding strength at the temperature of 40-80 DEG C, excellent insulation property, waterproof property, flame retardant property and sealing property and can be used for producing waterproof sealing tapes, wrapping wire and cable insulations, sealing pipelines and the like.

A packaging article for protectively storing perishable paper products that includes protective materials that protect the packaging article and its contents from any of a number of threats including water damage, fire damage, mold, insects, bacteria, fungi and theft. The packaging article comprises a bottom wall, side walls and a closure that surround and define an interior cavity in which the paper products are stored or transported. Each of the bottom wall, side walls and closure are made from a plurality of layers. Protective materials are applied to one or more of the bottom wall, side walls and closures by either impregnating a paper or cardboard with a suitable chemical, applying a film thereover, spraying a coating thereover or sandwiching the protective material between two adjacent layers. Suitable chemicals that produce the desired properties include, but are not limited to wax, oil, plastic, polybrominated diphenyl ether, polybrominated biphenyl, brominated cyclohydrocarbons, boric acid and hydrogen peroxide. A radio frequency identification tag may also be received within the wall of the packaging article to protect the same against theft.

The invention discloses pretreatment technology for detecting polybrominated diphenyl ethers residue in vegetables and belongs to the technical field of analytical chemistry. The pretreatment technology includes steps: 1, performing ASE extraction on a ground vegetable sample; concentrating extract; 3, loading a sample of the concentrated extract to an activated florisil-acidic silica gel solid-phase extraction purifying column, and using normal hexane for elution; 4, blow-drying eluent, and adding a fixed amount of normal hexane for re-dissolving; 5, performing gas chromatography-electronic capture device (GC-ECD) detection. The pretreatment technology has the advantages of simple operation, high speed and high extraction efficiency. The solid-phase extraction purifying column which is self-prepared is adopted to purify vegetable extract, so that purifying effect is good and cost is low. GC-ECD detection finds that the pretreatment technology is efficient and sensitive and is high in efficiency in extracting the PBDEs in the vegetables, good in purifying effect and suitable for pretreatment of qualitative and quantitative analysis of the PBDEs residue in the vegetables.

The invention discloses an environment-friendly crystalline silicon solar-cell back surface field silver-aluminium paste and a preparation method thereof. The silver-aluminium paste comprises the following components in percentage by weight: 15-35% of silver powder, 30-70% of aluminium powder, 10-15% of organic carrier, 1-5% of adhesive, 3.5-13% of solvent and 0.5-2% of dispersant. The organic carrier is prepared by dissolving 10-30% of ethyl cellulose resin in 70-90% of organic solvent. In the paste, environment-friendly glass powder without harmful substances is used as the adhesive, and an environment-friendly organic reagent is used as a solvent and a diluter; and thus, the prepared silver-aluminium paste does not contain six substances (Pb, Cd, Hg, Cr(VI), polybrominated diphenyl PBB and polybrominated diphenyl ether PBDE) inhibited by European Union RoHS Instruction, completely conforms to the Instruction 2005 / 84 / EC on phthalic ester in European Union RoHS, realizes environment friendliness in deed, and is beneficial to the import and export of solar cells made in China and raw materials of the cells.

The invention discloses nano zero-valent iron prepared by using iron and steel acid-cleaning wastewater and a preparation method and application thereof. The preparation method comprises the following steps: filtering acid-cleaning wastewater without removing iron ions in the iron and steel industry; regulating pH value of filtrate; successively adding ethanol solution and polyvinylpyrrolidone; adding sodium borohydride, absolute ethanol and water to prepare into sodium borohydride solution; stirring under protection of inert gas for reaction; and carrying solid-liquid separation, collecting, washing and drying solid to obtain the nano zero-valent iron. In the invention, addition of polyvinylpyrrolidone is equivalent to the mass of total iron ions in a reaction system; and the mole number of sodium borohydride is as at least three times as that of the iron ions in the total reaction system. The method can effectively convert the iron ions in the acid-cleaning wastewater in the iron and steel industry into the nano zero-valent irons, and the conversion rate reaches up to over 99%; sizes of the nano zero-valent iron particles prepared by the method are between 50-80 nm; and the nano zero-valent iron particles are spherical particles, and have good crystal forms and strong capability of degrading polybrominated diphenyl ethers.

The invention discloses a method for simultaneously detecting 21 hydroxyl polybrominated diphenyl ethers (OH-PBDEs) in soil. The method includes the following steps that 1, a soil sample to be detected is extracted with organic solvent, and the organic solvent is selected from normal hexane, acetonitrile, methyl alcohol, dichloromethane, methyl tertiary butyl ether and NaOH-ethyl alcohol; 2, an extracting solution obtained in the step 1 is concentrated and purified; 3, a product in the step 2 is detected through an ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometer and compared with a hydroxyl polybrominated diphenyl ether standard substance in parallel operation to obtain quantitative results. The method has the advantages of being high in detection speed, accurate in result, high in recovery rate, low in detection limit, high in sensitivity and matrix interference resistance and the like.

The invention discloses a chemical elution-plant combined remediation method of polybrominated diphenyl ether and heavy metal compound contaminated soil. Firstly, contaminated soil particles are crushed and screened; then, the soil particles are put in soil multiple ectopic remediation equipment, mixed eluant is added, and a ultrasonic reinforcement and heating treatment mode is adopted to perform the continuous ectopic synergy elution; glyptostrobus pensilis is inoculated in the eluted soil, nutrient source buffer solution being 15-30 mass% of the soil is applied; and the remediation is finished through manual cultivation growth. The method can synchronously and efficiently elute polybrominated diphenyl ether and multiple heavy metals in the soil; and the inoculation of the glyptostrobus pensilis and the addition of external source nutrient substances facilitate deep degradation of the residual polybrominated diphenyl ether after the elution of the soil, and facilitate the recovery of ecological function diversity and stability of polluted soil environmental microorganisms.

The invention discloses bacillus subtilis DB-2 and application thereof for degrading decabromodiphenyl oxide. The bacillus subtilis is preserved in China Center for Type Culture Collection (CCTCC) on 27th November 2009 with the preservation number of CCTCC No:M 209286. The bacillus subtilis has stronger degrading ability and is capable of debrominating decabromodiphenyl oxide to generate free bromonium ions. The bacillus subtilis does not generate high-toxicity secondary pollutants of polybrominated dibenzo-p-dioxins, polybrominated dibenzo-furans, low-brominated diphenyl ether, and the like after being biodegraded, and can be used for treating the pollution of the decabromodiphenyl oxide in the environment, thereby providing a decabromodiphenyl oxide degrading bacterium with low cost and high efficiency and without secondary pollution for treating the decabromodiphenyl oxide in chemical sludge or wastewater.

The invention discloses a manufacturing method and application of a poly brominated diphenyl ethers polluted soil in-situ remediation material. A liquid phase reduction method is adopted, absolute ethyl alcohol is used as a solvent, and polyvinylpyrrolidone is used as a dispersing agent to prepare dispersed-type nanometer Ni / Fe double-metal particles. The method is temperate in reaction condition and low in energy consumption. Meanwhile, the effective method using the dispersed-type nanometer Ni / Fe double-meter particles to remediate poly brominated diphenyl ethers BDE209 polluted soil in an in-situ mode is provided, can treat and remediate soil with different BED209 polluted degrees, and is good in development prospect. The in-situ remediation method is simple in technology and convenient to operate. A user just needs to directly add the product of the manufacturing method and the application of the poly brominated diphenyl ethers polluted soil in-situ remediation material to the polluted soil and turns over the soil at regular intervals, other complex devices and technologies are not needed, and the in-situ remediation method is easy to popularize and use.

The invention discloses efficient degradation bacteria for PBDEs (polybrominated diphenyl ethers) and an application thereof. Aiming at the characteristics of poor biochemical perforamnce, common pollution and diverse types of PBDEs, the invention provides a kind of economical, efficient, broad-spectrum and environment-friendly PBDEs degradation bacteria and an application thereof based on the current situation of PBDEs degradation, primarily the application in degrading PBDEs in wastewater biological treatment and environment biological remediation. The efficient degradation bacteria BFR01 provided by the invention come from the soil polluted by PBDEs, and are obtained by manual enrichment and separation and purification. The strain BFR01 is gram negative bacteria which have relatively small bacterial colony, white non-transparent round shape and non-smooth surface; the thalli can be spherical or ellipsoidal with diameter of 0.5-0.7 mu m; catalase and oxidase are positive, and V-P reaction is negative; and the nitrate can be reduced, and glucose can be oxidized to generate acid. In an aerobic condition, the bacteria not only have relatively strong PBDEs degradation ability, but also can degrade PBDEs at broad spectrum, and can be applied to the PBDEs-containing wastewater biological treatment and environment biological remediation.

The invention discloses a microbial fuel cell and application thereof in degradation of polybrominated diphenyl ethers. The microbial fuel cell comprises an anode chamber, a cathode chamber, an anode electrode, a cathode electrode, a proton permeation film and an external circuit, wherein an electrochemical active microorganism is in the anode chamber; the anode chamber is also filled with a culture solution, a carbon source and electron donors of the microorganism; cathode reaction liquid is filled in the cathode chamber; bromide flame retardant polluted water body sediment is inoculated in the anode chamber to serve as the electrochemical active microorganism; and polybrominated diphenyl ethers or polybrominated-diphenyl-ethers-containing pollutants are also in the anode chamber. In themicrobial fuel cell, under the action of the microorganism in the bromide flame retardant polluted water body sediment, the polybrominated diphenyl ethers in the cathode solution are degraded into low bromination biphenyl ethers even bromine-free diphenyl ethers, and simultaneously electrical energy is output, so that good effects of environmental pollution treatment and recycling are achieved. The microbial fuel cell can operate steadily in a long time, and has a very good application prospect in the degradation of polybrominated diphenyl ether materials in various types of waste water and polluted water bodies.

The invention discloses a monitoring method of persistent organic pollutants in atmospheric particulates based on a particulate continuous monitor. The monitoring method sequentially comprises the following steps: collection of atmospheric particulate samples with a specific particle size range, acquisition of a filter membrane, analysis of the persistent organic pollutants in the atmospheric particulate samples, and calculation of concentration. The monitoring method is rooted in established automatic air quality monitoring networks at home and abroad, creatively uses the particulate continuous monitor which is used for conventional atmospheric particulate monitoring in the monitoring of the persistent organic pollutants such as dioxins, polychlorinated biphenyls and polybrominated diphenyl ether in the atmospheric particulates, so that the accuracy, stability and continuity of monitoring results are ensured, zero additional sampling cost and zero additional energy consumption are realized, and a new way for the monitoring of the persistent organic pollutants in atmospheric fine particulates such as PM2.5 is opened up.

The invention discloses a RTV anti-pollution flashover coating. The RTV anti-pollution flashover coating is prepared from the following components in parts by mass: 35 to 50 parts of base gum, 1.5 to2 parts of silicone oil, 7 to 11 parts of aluminum hydroxide, 3.5 to 8.5 parts of white carbon black, 1.5 to 2.5 parts of iron oxide red, 1 to 5 parts of deca-brominated diphenyl ether, 30 to 35 partsof diluent, 0.2 to 1 part of catalyst, 1 to 2.5 parts of cross-linking agent and 1.5 to 3.5 parts of coupling agent. The RTV anti-pollution flashover coating disclosed by the invention has good electrical and mechanical properties and long service life, and can provide excellent anti-pollution flashover protection for power transmission and transformation external insulation equipment.

The invention relates to palladium loaded chelate resin and preparation method thereof. Polyacrolein-isoniazide acyl hydrazone chelate resin is taken as a high polymer carrier, the palladium selectivity enrichment performance of the active chelate group is utilized to bond ion onto the high polymer carrier, and the prepared palladium loaded chelate resin can be further reduced in situ to obtain zero valence state chelate resin. The invention has the advantages of simple synthesis step, the prepared palladium loaded chelate resin functional material has chemical stabilization, better interface absorption and catalyst degradation efficiency, is applicable to separation and removal of water body hard-degradation organic pollutant, such as dehalogenation degradation of polybrominated diphenyl ethers (PBDEs) like polyhalogenated hydrocarbon and absorption degradation of azo dyes.

The invention discloses an environment-friendly flame-resistant ABS resin, which comprises the following components by weight percentage: 72 percent to 84 percent of ABS resin granules, 15 percent to 22 percent of PDSPB expanding type flame retardant, 0.7 percent to 4.5 percent of montmorillonite, 0.1 percent to 0.5 percent of anti-oxidant agent, 0.1 percent to 0.5 percent of anti-dripping agent and 0.1 percent to 0.5 percent of lubricant. The flame-resistant ABS resin does not contain harmful substances of lead, mercury, cadmium, hexavalent chrome, polybrominated biphenyls, polybrominated diphenyl ethers and the like, and meets the requirements of RoHS instruction about innocuity and environmental protection. The montmorillonite / PDSPB synergistic flame-resistant ABS resin not only can guarantee the flame-resistant performance, but also can keep good mechanical performance, can completely or partially replace the flame-resistant ABS resin of the traditional halogenated flame retardant and has wide market prospect.

The invention discloses a method for degrading polybrominated diphenyl ether by combining surfactant solubilization and UV technology, which belongs to the technical field of environment-friendly halogenated aryl hydrocarbon organic pollutant treatment. The method adopts the technical proposal that surfactant solubilization of 2,2',4,4',5-pentabromated diphenyl ether is improved in a hydrophobic environment provided by nonionic surfactant micelle (Brij 35 or Brij 38) under the conditions of normal temperature and pressure, water bath and ultrasonic sound; and the 2,2',4,4',5-pentabromated diphenyl ether which is dissolved in a surfactant solution is subjected to UV advanced treatment at normal temperature and pressure and then subjected to stepwise debromination reaction or intermolecular elimination and annulation reaction to generate intermediate products, namely PBDEs from monobromo to tetrabromo and polybrominated dibenzofuran (PBDFs) from monobromo to tetrabromo. The whole technology has short time consumption and high efficiency, and the method can selectively degrade target pollutant without damaging a surfactant, provides convenience for recycling of the surfactant, and has good application prospect in the aspect of remediation of soil polluted by the PBDEs in electronic waste recycling sites.

The invention discloses Achromobacter xylosoxidans GYP4, and application of the same to degradation of brominated fire retardants, belonging to the field of biological treatment technologies for environmental pollutants. The Achromobacter xylosoxidans GYP4 is preserved in China Center for Type Culture Collection on March 9th, 2017, with an accession number of CCTCC No. M2017104. After a strain of Achromobacter xylosoxidans GYP4 is subjected to shake cultivation under the conditions of a pH value of 3.0 to 7.0, a temperature of 25 to 35 DEG C and a shaking speed of 150 r / min for 4 days, the strain can degrade 80% or more of 2,2',4,4'-tetrabromodiphenyl ether with an initial concentration of 1 mg / L. The strain of Achromobacter xylosoxidans GYP4 is applicable to bioremediation of water bodies and soil contaminated by polybrominated diphenyl ethers.

The invention discloses a remediation method of soil polluted by polybrominated diphenyl ethers. The method is composed of three parts of pretreatment, sequencing batch repair and drying, and used for performing innocent treatment on polluted soil. According to the remediation method disclosed by the invention, a sequencing batch polluted soil remediation device is integrated with the functions of pollutant enrichment, degradation and so on; in the meantime, compared with other methods, the method has the advantages in a plurality of aspects such as simple operation, convenience in mounting, low economic cost and environmental friendliness; therefore, the method is applicable to engineering application, and has a good application prospect in the remediation aspect of soil polluted by the polybrominated diphenyl ethers in an electronic waste recovery yard and the like.

The invention discloses a method for preparing environment-friendly electrode silver paste for a semiconductor capacitor. The electrode silver paste is used for screen printing and is prepared from superfine silver powder, environment-friendly glass powder, an organic carrier and a solvent. The method has the following beneficial effects: the environment-friendly electrode silver paste prepared by the method is mainly applied to the semiconductor capacitor, is coated on the surface of a dielectric substrate of the semiconductor capacitor through screen printing and then is sintered into an electrode; the electrode silver paste is an important material for the semiconductor capacitor and has the characteristics of low loss, high capacitance, strong adhesion and welding resistance; and the silver paste prepared by the method absolutely meets the environmental requirements (free of Pb, Cd, Hg, Cr(VI), poly brominated biphenyl (PBB) and poly brominated diphenyl ether (PBDE) and conforming to the directive 2005 / 84 / EC of European union RoHS on phthalates) of European union RoHS (restriction of hazardous substances) and is an ideal substitute for the non-environment-friendly silver paste which is commonly used at present.

The invention discloses screening and application of a polybrominated diphenyl ethers (PBDEs) degrading bacterium, and belongs to the technical field of biological treatment of environmental pollutants. The PBDEs degrading bacterium comes from soil contaminated by PBDEs and is obtained through artificial enrichment, separation and purification. The strain is a stenotrophomonas pavanii strain WZN-1 and is preserved in the China General Microbiological Culture Collection Center, the preservation date is August 30, 2016, and the preservation serial number is CGMCC No.12918. The WZN-1 strain is a Gram-negative bacterium, is faint yellow and presents a milk white and non-transparent circular bacterial colony with the surface raised; in a scanning electron microscope, the bacterium is in a rod shape, and the diameter is (0.5-0.7) micrometer*(1-2) micrometer. In a liquid culture medium, the strain has the good degrading capability on both decabromodiphenyl ether (BDE 209) and tetrabromodiphenyl ether (BDE 47).

The invention provides a high overload ablation resistant EPDM (Ethylene-Propylene-Diene Monomer) elastic heat insulation material which is prepared from 100 of EPDM, 15 to 20 of aromatic polyamide organic fiber, 5 to 12 of inorganic fiber, 12 to 25 of a silicon dioxide strengthening agent, 3 to 5 of zinc oxide, 5 to 15 of a petroleum based softener, 5 to 20 of an ammonium salt flame retardant, 10 to 30 of deca-brominated diphenyl ether, 5 to 15 of antimonous oxide and 2 to 4 of a peroxide vulcanizing agent, wherein the aromatic polyamide organic fiber is aramid fiber or heterocyclic aramid fiber; the inorganic fiber is asbestos fiber or ceramic fiber; the petroleum based softener is one of liquid paraffin and naphthenic oil. The high overload ablation resistant EPDM elastic heat insulation material is excellent in overload ablation resistance and relatively high in mechanical property and processing property, is applicable to the requirement of a high overload engine for the erosion resistance of an inner heat insulation material; therefore, effective heat insulation is guaranteed, the thickness of a heat insulation layer can be reduced, and the packing factor of the engine is increased.

The invention belongs to the technical field of environmental pollution waste treatment and novel material preparation and particularly relates to a method for preparing a photocatalyst with visible light response by mechanochemical treatment on polybrominated diphenyl ether solid waste. The method comprises the following steps: mixing polybrominated diphenyl ether solid waste with a debromination reagent under conditions of normal temperature and normal pressure, putting the mixture in a planetary high-energy ball mill reactor so that efficient degradation and debromination of polybrominated diphenyl ether can be realized through a mechanochemical reaction and the bromine element can be recycled at the same time, thus preparing the novel photocatalyst with visible light response. The method provided by the invention has the following advantages that the technological process is simple, the reaction conditions are mild (normal temperature and normal pressure), the target pollutants are completely decomposed, the finally generated product is a bromine-containing catalyst with visible light response; no excessive ball milling reagent is added and no secondary pollution is caused in the process, thereby meeting the conception of environmentally-friendly chemistry.

The invention discloses a mining polyethylene tubing combination made from masterbatch with antistatic and flame-resistant functions. According to 100 weight parts, the mining polyethylene tubing combination comprises the followings: firstly, the polyethylene which occupies 81 weight parts to 92 weight parts, the high density polyethylene is ethylene homopolymer, the polymerization degree of the high density polyethylene is 8800 to 9000, the number-average molecular weight is 80000 to 90000, and the weight-average molecular weight is 300000 to 320000; secondly, the masterbatch with antistatic and flame-resistant functions occupies 9 weight parts to 20 weight parts. The masterbatch with antistatic and flame-resistant functions is composed of: firstly, 20 weight parts to 35 weight parts of high density polyethylene; secondly, 9 weight parts to 20 weight parts of conductive carbon black; thirdly, 4 weight parts to 7 weight parts of deca-brominated diphenyl ether; fourthly, 1 weight parts to 4 weight parts of antimony trioxide; fifthly, 0.5 weight parts to 1 weight part of one-phenyl two-isooctyl phosphite; sixthly, 40 weight parts to 60 weight parts of calcium carbonate. The mining polyethylene tubing combination solves the problems of antistatic and flame-resistant performances of the polyethylene tubing, and the compatibility performance between the masterbatch and the polyvinyl resin is improved.

The invention relates to an environmentally friendly flame retarding styrene based resin in a polymer material technical field. The environmentally friendly flame retarding styrene based resin is prepared by the high-speed mixing of styrene based resin, main flame retardant, auxiliary flame retardant, toughening agent, antioxidant and stabilizer, twin-screw extrusion, hot cutting and air cooling. The color of the environmentally friendly flame retarding styrene based resin can be chosen arbitrarily, has good fluidity and stability, can be widely applied to injecting and extruding processing, and can enable users to change for using under the manufacturing condition of present materials or by small regulation without complicated and lengthy regulation for a new technology; and solves limitation problems like an European Union RoHS instruction, and provides an excellent material which can be suitable for a larger market for a majority of plastic product manufacturers. The environmentally friendly flame retarding styrene based resin of the invention realizes a UL90 VO grade of flame retardant only under the situation of slightly decreasing resin mechanical performance, and cost is only kept at a level of using polybrominated biphenyl or polybrominated diphenyl ether products.

The invention relates to a modification of the conductive polymer with positive temperature coefficient. The modification of the conductive polymer with positive temperature coefficient is characterized in that the basic composition adopts the weight percentage of polyethylene with high density and or low density which occupies 30 percent to 60 percent, the weight percentage of ethylene propylene diene monomer which occupies 10 percent to 30 percent, the weight percentage of electric carbon black which occupies 10 percent to 25 percent, the weight percentage of deca-brominated diphenyl ether which occupies 10 percent to 20 percent and the weight percentage of plastic stabilizer which occupies 5 percent to 10 percent. Because the ethylene propylene diene monomer is added into the polyolefin base material, under the precondition that PTC characteristic is not changed, the toughness of the polymer is enhanced, the crack is not generated in the low-temperature bending test (20 DEG C minus, 4 hours), the cold resistant performance is improved, no crack is generated under normal operation in the cold area with the temperature higher than 10 DEG C minus, the PTC characteristic is stable, and the power and the resistance are not obviously decreased.

The invention relates to an anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer, belonging to the technical field of high molecular materials. The elastomer comprises the following components in percentage by weight: 60-80% of thermoplastic polyurethane, 1-10% of reaction type anti-aging chain extender, 10-30% of halogen-free flame retardant, 1-10% of flame retardant synergist, 0.1-2% of antioxidant and 0-5% of non-flame retardant additive, wherein the thermoplastic polyurethane refers to one or two of polyether type thermoplastic polyurethane and polyester type thermoplastic polyurethane; and the reaction type anti-aging chain extender refers to one type or more types of epoxy resin. In the invention, through reasonable arrangement of the elastomer components, the resistance to high temperature and high humidity, hydrolysis and aging as well as the flame retardant dripping resistance of the halogen-free flame retardant thermoplastic polyurethane elastomer are improved; and the anti-aging halogen-free flame retardant thermoplastic polyurethane elastomer does not contain halogen or heavy metals particularly like lead, mercury, cadmium and hexavalent chromium or poly-brominated diphenyl ethers or poly-brominated biphenyls.

The invention relates to a bioslurry repair method for poly brominated diphenyl ethers polluted soil, and special equipment, and belongs to the technical field of environment protection. The bioslurry repair method is characterized by comprising the following steps of (1) adding the poly brominated diphenyl ethers polluted soil and water mixedly into a bioreactor, adding inorganic salt nutrients and microelements and inoculating fungi and bacteria during reaction, wherein an inoculation amount is 5%-15%, and a rotation speed of stirring paddles of the reactor is controlled at 110-150 rpm when a temperature is 25-30 DEG C and an aeration rate is 0.002-0.008 m<3> / s; and (2) firstly determining a brominated number polluted by poly brominated diphenyl ethers in the polluted soil, then regulating the inoculating ratio of the fungi to bacteria to increase a degradation effect and shorten a degradation time. The above bioslurry repair method for the poly brominated diphenyl ethers polluted soil is simple to operate, has strong capacity for removing poly brominated diphenyl ethers, and has a good repairing effect.