49 results about "Phenyl phosphate" patented technology

The invention relates to a pressure-sensitive adhesive film and a preparation method thereof, and belongs to the technical field of high polymer materials. The pressure-sensitive adhesive film is prepared from the following components in parts by weight: 70 to 95 parts of 2-ethylhexyl acrylate, 5 to 20 parts of methyl methacrylate, 2 to 15 parts of acrylic acid, 0.1 to 2.0 parts of an emulsifier, 30 to 140 parts of deionized water, 0.02 to 1.2 parts of a buffering agent, 0.1 to 10 parts of a high-temperature-resistant modifier, 0.1 to 5 parts of a flame retardant and 0.2 to 1.5 parts of an initiator, the maleimide enhances the intermolecular force and improves the glass transition temperature, the melting point and the heat resistance of the material, the phosphite decomposes hydroperoxide and prevents yellowing, and the carbazole monomer improves the high temperature resistance; phenyl dichlorophosphate and ammonium polyphosphate in the flame retardant form phosphate, air and heat are effectively isolated, phosphorus-oxygen and silicon-oxygen bonds are cooperated, and the flame retardant efficiency is improved. The pressure-sensitive adhesive film prepared by the preparation method disclosed by the invention not only has an excellent permanent adhesion effect, but also has good flame retardance and high-temperature resistance.

The present invention relates to the flame retardant and degradable field, and particularly to a bio-based flame retardant and degradable composition and a preparation method thereof. Wherein, the bio-based flame retardant and degradable composition includes the following raw materials for preparation: PCL resin, PLA resin, modified starch, bio-based flame retardant, compatibilizer, toughening agent, antioxidant, compared with the prior art, the present invention uses the unique rod-shaped nanomaterials of bamboo cellulose microcrystals, and combines surface modification and loading to prepare bamboo cellulose microcrystals loaded with phenyl phospho-taurine (PHPA-PA), forming an efficient flame retardant acid source, and at the same time, by modifying starch, the shortcomings of traditional starch such as high viscosity, strong hydrophilicity, and easy gelatinization are solved, modified starch is used as a carbon source, bamboo cellulose microcrystals loaded with phenyl phospho-taurine (PHPA-PA) are used as an acid source, PCL, PLA resin and other processing aids are compounded, and a bio-based flame retardant and degradable composition is developed, which solves the poor flame retardancy of traditional bio-based materials, and the contradiction between non-renewable and non-degradable flame retardants, and broadens the application field of degradable materials.

The application relates to the technical field of adhesives, and discloses a low-VOC flame-retardant double-faced adhesive for automobile interiors and a preparation method thereof. In the application, tetramethyl ethylene (epoxy propyl ammonium chloride) and bis (4-aminophenyl) -phenyl phosphate are reacted to obtain a cationic flame retardant, which is then added into a water-based acrylic resin emulsion to obtain a flame-retardant water-based acrylic resin adhesive and a flame-retardant double-faced adhesive. The cationic groups in the cationic flame retardant and the sodium carboxylate anions in the water-based acrylic resin form electrostatic force, the crosslinking degree between acrylic resin molecular chains is improved, the cohesion is increased, and the bonding performance and tensile shear strength of the adhesive are improved. The cationic flame retardant contains a triphenyl phosphate flame-retardant structure, has condensed-phase flame-retardant effect, improves the limiting oxygen index and the flame-retardant performance of the adhesive, and has good practical application in adhesives for new energy vehicles, double-faced adhesives and the like.

The invention relates to the technical field of chemistry and chemical engineering technologies, in particular to a steam turbine speed regulating system oil sludge cleaning agent and a preparation method thereof. Comprising phosphate base oil, a surfactant, a dispersing agent and a clearing agent, wherein the phosphate base oil comprises one or three of trimethyl phosphate, di-tert-butyl-phenyl phosphate and tri (xylene) phosphate; the oil sludge cleaning agent can efficiently and rapidly remove oil sludge attached to the speed regulating system, has good compatibility with a sealing material used in the speed regulating system, and solves the problems that cleaning is not thorough, the cost is high, the environment is polluted when operating oil is used, and a conventional cleaning agent cannot be used.

The invention relates to the technical field of building materials, and provides a sound-insulation fireproof building material and a preparation method thereof. The sound-insulation and fireproof building material is prepared from, by weight, 100 parts of flame-retardant wood fiber, 15-30 parts of adhesive, 5-6 parts of hollow glass beads and 1-3 parts of waterproof agent, a preparation method of the flame-retardant wood fiber comprises the following steps that a flame retardant is dispersed in a solvent, wood fiber is added, mixing and drying are conducted, and the flame-retardant wood fiber is obtained; and the flame retardant comprises a 2, 4-dihydroxy-5-pyrimidine boric acid and / or a phenyl phosphate compound. By means of the technical scheme, the problem that in the prior art, sound-proof and fireproof building materials are poor in flame retardant property is solved.

The invention relates to the technical field of polyurethane flame retardance, and discloses a phosphorus-containing micromolecular chain extender flame-retardant modified polyurethane elastomer, which is prepared by taking a phenyl phosphate diol compound as a micromolecular diol chain extender and participating in a polyurethane polymerization reaction process, so as to obtain the phosphorus-containing micromolecular chain extender flame-retardant modified polyurethane elastomer. The phenyl phosphate diol compound is used as a reactive flame retardant and is added into a molecular chain of the polyurethane elastomer, the mechanical strength and tensile property of the polyurethane elastomer are hardly influenced, and in the high-temperature combustion process, the phenyl phosphate diol compound is heated and decomposed to generate a phosphoric acid derivative which can be used as a dehydrating agent, so that the mechanical strength and tensile property of the polyurethane elastomer are greatly improved. The effect of promoting char formation is achieved, a compact carbon layer is generated on the surface of the elastomer, and the effects of blocking oxygen and inhibiting emission of toxic smoke are achieved.

The invention discloses a light internal partition wall board and a preparation process thereof, and belongs to the technical field of building materials. The light internal partition wall board is prepared from the following main raw material components in parts by mass: 500 to 700 parts of slag washed sand, 1400 to 1600 parts of cement, 40 to 50 parts of flame-retardant light filler, 10 to 24 parts of flame retardant, 15 to 60 parts of air entraining agent, 8 to 24 parts of water reducing agent and 330 to 750 parts of water. Wherein the flame-retardant light filler is obtained by sequentially reacting expanded polystyrene particles with bis (pinacolato) diboron, 4-bromo-3-isopropyl benzoic acid and triisopropyl phenyl phosphate; the water reducing agent is prepared from polyvinyl alcohol; the prepared light internal partition wall board is high in compressive strength, good in fire resistance and light in mass.

The invention discloses a multifunctional heating reaction kettle for isopropyl phenyl phosphate production, and belongs to the technical field of reaction kettles.The multifunctional heating reaction kettle comprises a kettle body, a discharging pipe is arranged in the middle of the lower end of the kettle body, heating pipes are installed on the two sides of the lower end in the kettle body, a kettle cover is arranged at the upper end of the kettle body, and a feeding pipe is arranged on the rear side of the kettle cover; by arranging the stirring assembly, a first motor is started to drive a main rod to rotate clockwise during heating, and the main rod rotates to drive an auxiliary rod to rotate anticlockwise through a first straight gear and a second straight gear; the main rod and the auxiliary rod rotate in opposite directions, isopropyl phenyl phosphate materials in the kettle body are stirred through the stirring plates, convection is formed, meanwhile, the main rod and the auxiliary rod rotate to drive the spiral blades to rotate so that the isopropyl phenyl phosphate materials can flow in the axial direction, the stirring effect on the materials in the kettle body is better through the stirring assembly, and the stirring effect is better. Therefore, the material heating speed is higher, and the working efficiency of the device is improved.

The invention relates to a preparation method of a plastic bone grafting material and the plastic bone grafting material.The preparation method comprises the following steps that a, phenyl phosphate lithium salt is dissolved in a phosphoric acid buffer salt solution to obtain a mixed solution, and Ge MA is dissolved in the mixed solution to obtain a Ge MA gel solution; b, bone meal and the Ge MA gel solution are subjected to a cross-linking effect, so that the bone meal and the Ge MA gel solution are fully mixed, then light source irradiation is conducted, the bone meal hydrogel bone grafting material is obtained, and the particle size of the bone meal is 0.25-0.5 mm. According to the preparation method of the plastic bone grafting material, provided by the invention, the bone meal and the Ge MA gel solution are subjected to cross-linking and then subjected to light source irradiation, so that the bone meal and the hydrogel are uniformly mixed, the compatibility of an organic phase and a bone meal particle interface is good, and the prepared plastic bone grafting material is relatively high in plasticity and good in osteoinductivity; and the cell adhesion rate is high.

The invention discloses a flame-retardant synergist, a preparation method thereof and a flame-retardant polypropylene composite.The preparation method of the flame-retardant synergist comprises the steps that soluble nickel salt, phenylphosphonic acid, hexamethylenetetramine and polyvinylpyrrolidone are taken and added into a reaction solvent, stirring is conducted for 0.5-2 h, and a mixed solution is obtained; the mixed solution is subjected to a reaction for 12-24 h at the temperature of 150-200 DEG C, and a lamellar nickel phenyl phosphate material, namely the flame retardant synergist, is prepared. The lamellar nickel phenyl phosphate material prepared in the invention can be used as a flame retardant synergist to be added into a polypropylene system, can reinforce the polypropylene material, and also can cooperate with a flame retardant to significantly improve the flame retardant property of the polypropylene material.

Electrolyte formulations for lithium-ion batteries are disclosed that enable high-voltage operation, improved cycle life, reduced impedance, and enhanced safety. The formulations comprise an aprotic organic solvent, a lithium salt, and an epoxide functionalized organic compound, and may further include additives such as organosulfur compounds, alkyl nitriles, fluorinated aliphatic esters, cyclic carbonates, partially fluorinated phenyl phosphate esters, and fluorinated cyclic phosphazenes. These components synergistically stabilize the cathode electrolyte interface (CEI), mitigate oxidative decomposition at elevated voltages, and impart flame-retardant properties. Electrochemical energy storage devices incorporating these formulations exhibit superior performance under high-voltage and high-temperature conditions, making them suitable for applications such as electric vehicles, aerospace systems, and grid storage.

The invention relates to the field of synthesis of hyperbranched polymers, and discloses a synthesis method of a flame-retardant hyperbranched polymer with a side group grafted with a P-N group, and the synthesis method comprises the following steps: dissolving phenyl dichlorophosphate and triethylamine in tetrahydrofuran, dropwise adding hydroxyethyl acrylate dissolved in tetrahydrofuran, carrying out a stirring reaction for 3 h, dropwise adding N, N-dimethylethanolamine dissolved in tetrahydrofuran, carrying out a stirring reaction for 2 h, and carrying out a reaction for 3 h; stirring and reacting for 3h; raising the temperature to 20 DEG C, continuously reacting for 10 hours, and ending the reaction; filtering the product in the previous step, extracting and separating liquid, and carrying out reduced pressure distillation to remove the solvent to obtain yellow viscous liquid DPHP; the preparation method comprises the following steps: dissolving DPHP and a catalyst Pd-diimine in dichloromethane, carrying out shading reaction for 24 hours under the ethylene pressure of 0.1 Mpa, and removing excessive solvent to obtain a product HBPE (at) PDPHP; then, the HBPE-coated PDPHP is added into a PI matrix, and through vertical combustion and limit oxygen index tests, it is found that the flame retardant effect of the PI composite material added with 10% of HBPE-coated PDPHP reaches the V-0 level. The preparation method is mild in preparation condition and environment-friendly, can be used as an additive to be added into engineering plastics for modification, and has the advantages of harmlessness, smoke suppression, environment friendliness and the like.

The invention relates to the technical field of nylon, and discloses a high-strength and high-modulus nylon fiber and a preparation method thereof.The high-strength and high-modulus nylon fiber is obtained by melt extrusion, melt spinning, winding, drafting and heat setting of nylon resin and a polyamide phosphate flame retardant according to the proportion of 100 g: (1-8) g. The polyamide phosphate flame retardant contains a large number of bis-spiro phenyl phosphate flame-retardant structures and has excellent flame-retardant performance, magnesium hydroxide, aluminum hydroxide, montmorillonite and other inorganic flame retardants do not need to be added, the molecular main chain of the flame retardant contains amido bonds, the end position of the flame retardant also contains a large number of amido bonds, strong hydrogen bond interaction is formed between the flame retardant and nylon, and therefore the flame retardant performance is improved. A proper amount of flame retardant is added, so that a certain reinforcing effect is achieved on the nylon fiber, the breaking strength and the initial modulus are obviously improved, and the practical application of the nylon fiber in the aspects of fireproof suits, refractory materials and the like is expanded.

The present invention relates to the technical field of adhesives, and discloses an epoxy resin adhesive containing a high molecular weight flame retardant and a preparation method thereof. The epoxy resin adhesive is made of 80-100 parts of epoxy resin, 1-3 parts of high molecular weight flame retardant, 2-4 parts of inorganic filler, and 5-15 parts of curing agent. The high molecular weight flame retardant is prepared by reacting a phenyl phosphate derivative containing bis-epoxy substituents in its structure with a bis-terminal amino siloxane compound. By adding the high molecular weight flame retardant as a modifier to the epoxy resin and utilizing the active hydroxyl groups in its structure, it can participate in the curing of the epoxy resin, thereby introducing the high molecular weight flame retardant into the epoxy resin structure. By virtue of the rich nitrogen-phosphorus-silicon flame retardant elements and Si-O structure contained in the high molecular weight flame retardant structure, the prepared epoxy resin adhesive can have good flame retardancy and high temperature resistance.

The present application relates to the technical field of hydraulic oil, and discloses a fire-retardant hydraulic oil, wherein the hydraulic oil comprises base oil, antioxidant, copper corrosion inhibitor, rust inhibitor, antifoaming agent, demulsifier and hydrolysis inhibitor; wherein the base oil is selected from at least one of mixture A, mixture B and mixture C; wherein the mixture A is selected from a compound as shown in general formula (I): wherein X is selected from any one of, and the mixture B and the mixture C both comprise (4-tert-butylphenyl) diphenyl phosphate, bis(4-tert-butylphenyl) phenyl phosphate, tris(4-tert-butylphenyl) phosphate and triphenyl phosphate. The hydraulic oil has excellent antioxidant, corrosion / rust resistance, emulsion resistance, hydrolysis resistance, antifoaming performance and accelerated aging resistance, slows down the deterioration speed of triaryl phosphate fire-retardant hydraulic oil, and prolongs the service life of the fire-retardant oil.

To provide an analytical method of isopropylated phenylphosphate with high reliability.SOLUTION: An analytical method of isopropylated phenylphosphate includes the steps of: thermally extracting a specimen; obtaining mass spectrum of one or more compounds contained in the specimen by analyzing the thermally extracted specimen by gas chromatograph mass analysis method; and determining whether or not fragment ion or / and parent ion that is specific mass-to-charge ratio (m / z) are contained in mass spectrum.SELECTED DRAWING: Figure 1

The invention relates to the technical field of silk-screen printing ink, in particular to a silk-screen printing process of an aluminum veneer. Comprising the following steps: preparing a composite chain extender; preparing a modified waterborne polyurethane emulsion; and carrying out a silk-screen printing process on the aluminum veneer. The ethylene carbonate, the hexamethylenediamine and the phenyl phosphate are compounded to prepare the chain extender, the ethylene carbonate and the phenyl phosphate can react with the hexamethylenediamine, bifunctional groups perform synergistic chain extension, and the phenyl phosphate is connected to a chain extender molecule through a chemical bond. The migration and precipitation of small molecules sheared during the reaction of ethylene carbonate and hexamethylenediamine are avoided, so that the molecular chain length and the crosslinking degree are improved, the hardness of the silk-screen printing ink prepared from the polypropylene oxide glycol and epoxidized soybean oil blended waterborne polyurethane emulsion is improved, and meanwhile, the hardness of the silk-screen printing ink is ensured not to be attenuated during long-term use.

The invention relates to the field of synthesis of hyperbranched polymers, and discloses a method for synthesizing a multifunctional hyperbranched copolymer through a one-pot method, which comprises the following steps: (a) dissolving phenyl dichlorophosphate and triethylamine in dichloromethane to form a blended solution; (b) dropwise adding hydroxyethyl acrylate dissolved in dichloromethane, stirring and reacting for 3 hours, then dropwise adding diethylamine dissolved in dichloromethane, and stirring and reacting for 3 hours; (c) heating to 20 DEG C, continuously reacting for 10 hours, and ending the reaction; (d) filtering the product in the step (c), extracting and separating liquid, and carrying out reduced pressure distillation to remove the solvent, so as to obtain brown viscous liquid AEPA; (e) dissolving the product in the step (d) and a catalyst Pd-diimine in dichloromethane, carrying out shading reaction for 24 hours under the ethylene pressure of 0.1 Mpa, and then removing excessive solvent to obtain HBPE and PAEEPA; according to the present invention, by adding the 10% HBPE coated PAEEPA into the PI matrix, the vertical combustion and limit oxygen index test results show that the flame retardation effect of the PI composite material added with the 10% HBPE coated PAEEPA can achieve the V-0 level, the flame retardation performance of the polymer is effectively improved, and the processing difficulty is reduced;

The invention discloses an antistatic high-barrier polymer film and its application in semiconductor packaging, and relates to the technical field of polymer materials. When preparing the antistatic high-barrier polymer film, the present invention first oxidizes and polymerizes 3,4-ethylenedioxythiophene and 3-thiophene methanol and deposits them on nano-montmorillonite to obtain modified nano-montmorillonite; phenyl dichlorophosphate is reacted with glycidol to obtain epoxidized phenyl phosphate; epoxidized phenyl phosphate is reacted with carbon dioxide to obtain functionalized cyclic carbonate; functionalized cyclic carbonate is reacted with 1,6-hexamethylenediamine to obtain polyurethane; polyurethane, modified nano-montmorillonite, and blocked isocyanate crosslinking agent are calendered to obtain an antistatic high-barrier polymer film. The antistatic high-barrier polymer film prepared by the present invention has excellent antistatic, high-barrier, flame-retardant and mechanical properties.

The invention relates to a low-density flame-retardant silane modified sealant and a preparation method thereof, and belongs to the technical field of high polymer materials. The sealant comprises the following components: an alkoxy-terminated silyl-organic phosphorus-silicon hybrid polyurethane prepolymer with a specific structure, a bis (triethoxysilylpropyl) phenyl phosphate reactive flame-retardant plasticizer, a flame-retardant filler, hollow glass beads, fumed silica, dipentaerythritol and the like. According to the invention, a phosphorus-based flame-retardant unit is embedded into a polymer main chain to realize intrinsic flame retardance, a terminal alkoxy silicon group of a reactive plasticizer is utilized to realize functional persistent bonding, and a composite filler system is constructed to realize synergistic interaction. The prepared sealant has a high flame-retardant grade, excellent mechanical properties, elastic recovery rate and long-term durability while the density is remarkably reduced, and the technical problems that a traditional flame-retardant sealant is large in density and poor in performance are solved.

The application discloses a phosphate ester fire-resistant oil composition with isomer directional regulation and a preparation method thereof, and particularly relates to the technical field of hydraulic oil, which comprises a directional regulation type tri (dimethylphenyl) phosphate ester, a directional regulation type tertiary butyl phenyl phosphate ester, a chlorine capturing agent, a composite antioxidant, an antifoaming agent and a metal deactivator. The product has an ultralow chlorine content, excellent antifoaming property and air release property, and the comprehensive performance meets the requirements of the electro-hydraulic regulating system of a power plant steam turbine, through isomer directional screening and para-substitution regulation, combined with catalyst-free esterification and complex chlorine capturing.

The invention discloses a bio-based polyurethane flame-retardant protective material and application thereof in safety helmets, and belongs to the technical field of safety helmet materials.The bio-based polyurethane flame-retardant protective material is prepared from, by weight, 95-110 parts of modified bio-based PN flame-retardant polyester diol, 10-20 parts of a chain extender, 0.8-1.5 parts of a surfactant and 2-6 parts of a water foaming agent, 60 to 90 parts of diisocyanate, 0.1 to 0.5 part of an organic tin catalyst and 0.2 to 0.5 part of an organic amine catalyst; the modified bio-based PN flame-retardant polyester diol is prepared by grafting PN flame-retardant components including melamine, diethyl phenyl phosphate and benzotriazole to a biological matrix castor oil; the bio-based polyurethane flame-retardant protective material provided by the invention has excellent flame retardancy and impact resistance, and can be used in the preparation of safety helmets.

The invention discloses a pressure-reducing and injection-increasing blocking remover for a carbon dioxide oil-displacing injection well and a preparation method of the pressure-reducing and injection-increasing blocking remover. The blocking remover comprises the following components in percentage by weight: 3.0%-10.0% of alkylphenol polyoxyethylene ether, 1.0%-3.0% of sodium alkyl naphthalene sulfonate, 2.0%-3.0% of isopropyl phenyl phosphate, 1.0%-10.0% of polyether amine, 1.0%-5.0% of carboxylate-sulfonate-nonionic terpolymer, 3.0%-5.0% of low molecular weight sulfonated polystyrene, 1.0%-2.0% of pentanedione, 0.1%-2.0% of hydroxyethyl cellulose and the balance of water. 2.0%-6.0% of sorbitan fatty acid ester polyoxyethylene ether and the balance of water. The blocking remover disclosed by the invention has better asphaltene dissolving and dispersing performance, inorganic scale inhibition performance and lower corrosivity, and can be used for improving the recovery ratio of a carbon dioxide flooding injection well.

The invention relates to the technical field of adhesives, and discloses a low-VOC flame-retardant double faced adhesive tape for automotive trim and a preparation method thereof.The preparation method comprises the steps that tetramethyl ethylene bis (epoxypropyl ammonium chloride) and bis (4-aminophenyl)-phenyl phosphate react to obtain a cationic flame retardant, then the cationic flame retardant is added into water-based acrylic resin emulsion, and the water-based acrylic resin emulsion is added into the cationic flame retardant to obtain the low-VOC flame-retardant double faced adhesive tape for automotive trim. The flame-retardant water-based acrylic resin adhesive and the flame-retardant double-faced adhesive tape are obtained. Cationic groups in the cationic flame retardant and sodium carboxylate anions in the water-based acrylic resin form electrostatic acting force, so that the crosslinking degree between molecular chains of the acrylic resin is improved, the cohesion is increased, and the adhesive property and the tensile shear strength of the adhesive are favorably improved. The cationic flame retardant contains a triphenyl phosphate flame retardant structure, has a condensed phase flame retardant effect, improves the limit oxygen index and flame retardant property of the adhesive, and has good practical application in the aspects of adhesives for new energy automobiles, double faced adhesive tapes and the like.

The invention discloses a PBT (polybutylene terephthalate) material for secondary coating of an optical communication micro cable and a preparation method of the PBT material. The PBT material is prepared from the following components in percentage by weight: 98.5-99.6% of PBT resin; 0.2%-0.8% of a crystallizing agent, wherein the crystallizing agent is an organic acid salt or nano clay or an inorganic mineral; 0.2%-0.7% of a lubricant; the crystallizing agent is one or more of sodium benzoate or sodium phenyl phosphate or sodium stearate or talcum powder or organic modified montmorillonite. According to the preparation method of the PBT material, the crystallization nucleus is added at a low-temperature stage, so that the crystallization efficiency of the PBT resin is improved from 60% to 90% or above, the performance of the material is improved, rapid shaping of the material in micro-cable high-speed extrusion production is ensured due to the high crystallization speed, and the problems that a thin-wall pipe is difficult to form and easy to deform are solved; the adding amount of the crystallizing agent is strictly controlled, and the excess length of the optical fiber is accurately controlled within 0.02%-0.04%.

The application relates to the technical field of ceramic substrates, and discloses high-surface-finish alumina multilayer ceramic substrates and a preparation method thereof. The high-surface-finish alumina multilayer ceramic substrate comprises the following components by weight: 80-90 parts of alumina, 4-6 parts of a sintering aid, 3-4 parts of a dispersing aid, 6-8 parts of a binder and 75-85 parts of a solvent; the dispersing aid comprises triethyl phosphate, fumed silica and a phenyl phosphate compound. The above technical scheme solves the problem of poor surface finish of alumina multilayer ceramic substrates in the related art.

The present invention constructs a method for a three-enzyme cascade-triggered fluorescence immunosensing platform by sequentially integrating ALP, TYR, and HRP. This platform relies on the fact that HRP and H2O2 can promote the rapid in-situ fluorescence reaction of dopamine and 1,5-naphthalenediol to produce a strong yellow fluorescent compound (AFC). The molecular formula (C 18 H 15 NO4) and structure of the synthesized AFC were determined by nuclear magnetic resonance mass spectrometry characterization, and based on the fact that ALP can induce the hydrolysis of p-aminophenylethyl phenyl phosphate (PAPP) to produce the intermediate tyramine, and TYR can catalyze the production of DA, which in turn activates HRP, a three-enzyme fluorescence immune system was constructed. The high-sensitivity detection of cardiac troponin I was achieved using this system. This advanced signal transduction scheme can provide a new method for studying multi-enzyme cascade systems and constructing multifunctional biosensors.

The present invention relates to the technical field of polyurethanes, and discloses a preparation method of an antibacterial modified thermoplastic polyurethane elastomer. In the present invention, 1-hydroxymethyl-5,5-dimethylhydantoin and N-(2-hydroxyethyl)ethylenediamine are used as raw materials, and through reaction, intermediate 1 is prepared. Then, it is reacted with monocyanamide to obtain intermediate 2. The hydroxyl group contained in intermediate 2 is used for substitution reaction with phenylphosphonic dichloride to obtain intermediate 3. Intermediate 3 is chlorinated by sodium hypochlorite to obtain a guanidine-containing haloamine phenyl phosphate. Montmorillonite and the guanidine-containing haloamine phenyl phosphate are added to the thermoplastic polyurethane elastomer, mixed evenly, extruded and granulated, and compression molded to obtain the antibacterial modified thermoplastic polyurethane elastomer. The thermoplastic polyurethane elastomer prepared by the present invention has excellent antibacterial performance and flame retardant performance.

This invention discloses a bio-based polyurethane flame-retardant protective material and its application in safety helmets, belonging to the technical field of safety helmet materials. The bio-based polyurethane flame-retardant protective material of this invention comprises the following components by weight: 95-110 parts of modified bio-based PN flame-retardant polyester diol, 10-20 parts of chain extender, 0.8-1.5 parts of surfactant, 2-6 parts of water-based foaming agent, 60-90 parts of diisocyanate, 0.1-0.5 parts of organotin catalyst, and 0.2-0.5 parts of organic amine catalyst. The modified bio-based PN flame-retardant polyester diol is obtained by grafting PN flame-retardant components melamine, diethyl phenyl phosphate, and benzotriazole onto a bio-based castor oil matrix. The bio-based polyurethane flame-retardant protective material provided by this invention has excellent flame-retardant properties and impact resistance, and can be used in the manufacture of safety helmets.

The invention discloses a high-strength full-biodegradable agricultural mulching film and a preparation method thereof, and relates to the field of agricultural mulching films. When the high-strength full-biodegradable agricultural mulching film is prepared, corn starch hydroxyl is oxidized and then reacts with dopamine hydrochloride, and modified corn starch is prepared; the preparation method comprises the following steps: polymerizing urea and formaldehyde, blocking by using 4-vinyl phenyl phosphate monoethyl ester, reacting with modified corn starch, preparing a film, and performing surface treatment by using sodium iminodiacetate monohydrate, thereby obtaining the high-strength full-biodegradable agricultural mulching film. The high-strength full-biodegradable agricultural mulching film prepared by the invention has the effects of photo-thermal conversion, adsorption of heavy metal ions in soil and degradation to produce fertilizers.