66 results about "Diethyl phosphate" patented technology

The invention discloses a cool breathable fiber and a preparation method thereof, and relates to the field of fibers. When the cool-feeling breathable fiber is prepared, shell powder sequentially reacts with 3-chloropropyltrimethoxysilane, 2, 6-dihydroxy naphthol and 3, 3-diphenyl-2-propyne-1-alcohol, and functionalized shell powder is prepared; the preparation method comprises the following steps: reacting (formylmethyl) diethyl phosphate with (4-pyridyl) acetone, firstly polymerizing with dimethyl terephthalate and ethylene glycol, and then reacting with N-[4-(aminomethyl) phenyl] guanidine to prepare modified polyester; and finally, mixing the modified polyester, the functionalized shell powder and zinc acetate, and spinning to obtain the cool breathable fiber. The cool breathable fiber prepared by the invention has flame-retardant, durable and antibacterial capabilities.

The invention discloses an acid and alkali resistant fiber and a preparation method thereof, and relates to the field of fiber fabrics. When the acid and alkali resistant fiber is prepared, dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, 1, 3-bis (3-hydroxypropyl)-1, 1, 3, 3-tetramethyldisiloxane and diethyl phosphite are polymerized and then react with 4-vinyl benzoyl chloride and 2-mercaptobenzothiazole in sequence, and modified polyester is prepared; the preparation method comprises the following steps: sequentially reacting microcrystalline cellulose with 3-(chloromethyl)-2-hydroxybenzaldehyde, 4-allylthiosemicarbazide and copper chloride to prepare modified cellulose; the modified cellulose and the modified polyester are mixed and subjected to melt spinning, then perfluoroethylene is used for after-finishing, and the acid and alkali resistant fiber is prepared. The acid and alkali resistant fiber prepared by the invention has durable, flame-retardant and antibacterial capabilities.

The invention discloses a method for detecting phosphate impurities, namely diethyl phosphoacetic acid and diethyl phosphate, in afatinib, and establishes a simple and sensitive ion chromatography detection method based on the hydrolysis property of a phosphate compound under an alkaline condition. Sodium hydroxide or potassium hydroxide solution-water is used as a mobile phase for isocratic or gradient elution, and a conductivity detector is used for detection. According to the present invention, the accurate quantification of the impurities in the afatinib is achieved, the detection speed is fast, the cost is low, the operation is simple, and the good specificity, the sensitivity, the precision and the accuracy are provided, such that the product quality of the afatinib maleate bulk drug synthesized by using the diethyl phosphoacetic acid as the starting material and the related preparation can be further ensured.

The invention discloses a tetrazine probe synthon and a preparation method and application thereof.The preparation method comprises the following steps that under the inert atmosphere, diethyl cyanomethylphosphonate, 3-hydroxypropionitrile, 3-mercaptopropionic acid and hydrazine hydrate are mixed and then react at the room temperature, a sodium nitrite solution is added after the reaction is finished, then acid is continuously added till the reaction system reaches acidity, and a tetrazine probe synthon product is obtained; continuously reacting to obtain an intermediate; and dissolving the intermediate in a solvent in an inert atmosphere, adding triethylamine, slowly adding methanesulfonyl chloride, and reacting at room temperature to obtain the tetrazine probe synthon shown in the formula I. The invention further discloses a preparation method of the tetrazine probe synthon. The tetrazine probe synthon provided by the invention can perform series Heck reaction and HWE reaction, so that controllable combination of functional groups on two sides of a tetrazine coupling probe is realized under mild reaction conditions, and the functional groups on two sides are designed according to actual requirements to regulate and control photophysical properties of the probe. A brand new way is provided for developing a high-performance biological orthogonal fluorescent probe.

The invention discloses a benzoxphosphine ligand and a complex and application thereof. The structure of the benzoxphosphine ligand is shown as a formula (I), in the formula (I), R1 is alkyl or aryl substituted oxazolidinyl or imidazoline, R2 is alkyl and / or aryl, and R3 is at least one of fluorine, carbazolyl and 2, 6-dimethoxyphenyl. According to the benzoxphosphine ligand disclosed by the invention, the metal iridium complex can be used as a catalyst to be applied to an asymmetric hydrogenation reaction of alpha-phenyl vinyl diethyl phosphate, and has excellent activity and relatively high enantioselectivity; moreover, the benzoxphosphine ligand disclosed by the invention can be directly synthesized from simple and easily available chiral aldehyde, and the preparation method is simple and easy to operate.

The invention relates to a waterborne polyurethane emulsion as well as a preparation method and application thereof. The preparation raw materials of the waterborne polyurethane emulsion comprise the following components: an isocyanate monomer, flame-retardant polyether polyol, polydimethylsiloxane, a hydrophilic chain extender and a small molecular alcohol chain extender. The flame-retardant polyether polyol is a polymer formed by [(bis (2-hydroxyethyl) amino) methyl] diethyl phosphate and an epoxy compound. According to the synthesized waterborne polyurethane coating, the synergistic effect of nitrogen, phosphorus and silicon is utilized, flame propagation can be effectively inhibited, the molten drop phenomenon can be remarkably inhibited, and the limit oxygen index and the vertical combustion grade of the material are greatly improved.

The invention provides a polymer fluorescent nano-film, a template-free self-assembly preparation method thereof and application of a nerve poison sensing detection agent, and the polymer fluorescent nano-film is prepared on a gas-liquid interface through dynamic acylhydrazone bond condensation reaction by taking a column [5] arene hydrazide derivative and tetraformyl tetraphenylethylene as film building monomers. The polymer fluorescent nano-film is prepared through template-free self-assembly, the preparation process is simple, the conditions are mild, and the accurate regulation and control of the film thickness can be realized by changing the concentration of the precursor solution or the volume of the solution per unit area. The prepared film has a flat, smooth and defect-free surface, has excellent mechanical properties, shows good toughness and puncture resistance, shows excellent sensing performance on a nerve toxic agent simulant diethyl chlorophosphate, has excellent detection capability on a real nerve toxic agent sarin under the assistance of a solvent, and can be widely applied to the field of neurology and neurology, such as neurology, neurology, neurology, neurology, neurology, neurology, neurology, neurology, neurology, neurology, neurology and neurology. The method is expected to play an important role in the fields of public place safety monitoring and the like, and has a wide application prospect.

The invention relates to the technical field of organic synthesis, and provides a synthesis method of an important organic synthesis intermediate methyl diethyl phosphonate. Comprising the following steps: firstly, adding paraformaldehyde and alkali into a solvent, heating and stirring, and filtering to obtain an intermediate solution; and adding cation exchange resin and the intermediate solution into a reaction flask, dropwise adding diethyl phosphite, carrying out a heat preservation reaction after dropwise adding is completed, filtering to remove the cation exchange resin (which can be recycled for multiple times) after the reaction is completed, and carrying out reduced pressure distillation to remove the solvent and a trace amount of diethyl phosphite residue, so as to obtain the product. The method has the main advantage that paraformaldehyde is used as a methylation reagent and reacts with diethyl phosphite in one step under the action of a catalyst to obtain a target product.

The present invention relates to a pyridine derivative-containing triarylethylene photochromic material and its preparation and application methods. A pyridine ring or its derivative containing a formaldehyde substituent at one end is subjected to a Corey-Funchs reaction to synthesize its dibromosubstituted product; then, the dibromosubstituted product is reacted with an aromatic compound or heterocyclic compound containing a boric acid or pinacol borate group through a Suzuki reaction; or a benzophenone derivative is reacted with a pyridine ring or its derivative containing a diethyl phosphate group through a Wittig reaction to obtain the pyridine derivative-containing triarylethylene photochromic material. The present invention has low-cost raw materials and a simple and easy synthesis process. The prepared photochromic material has the advantages of dual light / proton response, high color purity, a wide color change wavelength range, and long color change durability. This expands the original triarylethylene photochromic material with a single stimulus response to a light / proton dual-responsive photochromic material, and also expands the color change range from orange to red and purple. The material is suitable for multiple fields such as inspection, storage encryption, and biological imaging.

The present invention relates to methods of treating endometriosis or preventing recurrence of endometriosis. In particular, the present invention relates to a method of treating endometriosis and relapse thereof, comprising administering to a woman suffering from endometriosis a pharmaceutical composition comprising an S-alkyl isothiourea derivative, in particular S-ethyl isothiourea diethyl phosphate. The methods and pharmaceutical compositions of the present invention can retain fertility and can be fertilized.

The invention discloses a smoke-suppressing low-toxicity flame-retardant floor board and a preparation method thereof. The method comprises the steps that S1, wood is placed in a mixed solution of imidazole diethyl phosphate and a Lewis acid catalyst, vacuum impregnation and heating and pressurizing impregnation are sequentially conducted, and the wood is drained after impregnation; the wood is sequentially placed in a chitosan solution, a metal salt solution and an alkaline solution to be subjected to pressure dipping, and complexing flame retardant modified wood is obtained after draining and washing; and S2, the complex flame retardant modified wood is soaked in a water-soluble charring agent solution, drained after being pressurized and soaked, washed with water and dried, and the flame retardant modified wood is obtained. The imidazole diethyl phosphate is obtained by carrying out condensation reaction on 1-(3-aminopropyl) imidazole and (formyl methyl) diethyl phosphate in a mass ratio of (0.5-0.7): 1. The problems that a current floor board is poor in flame retardant property durability, high in smoke density and low in carbon residue amount can be effectively solved.

The invention provides a phosphorus-nitrogen synergistic intumescent flame retardant and a preparation method and application thereof, and belongs to the technical field of flame retardants, the preparation method comprises the following steps: step S1, enabling expandable graphite and isocyanate to react in the presence of a catalyst to obtain activated expandable graphite; s2, under the protection of inert gas, 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane and protocatechuic aldehyde are subjected to a Schiff base reaction in a solvent, then diethyl phosphite and zinc chloride are added, a phosphoric acid addition reaction is performed, and a flame-retardant monomer is obtained; s3, adding the activated expandable graphite and a flame-retardant monomer into a solvent, and performing grafting reaction in the presence of a catalyst to obtain the phosphorus-nitrogen synergistic intumescent flame retardant. Through the process design of isocyanate activation of the expandable graphite and flame-retardant monomer grafting, a multi-component synergistic flame-retardant system based on chemical bonding is constructed, so that the flame-retardant property of the composite material is improved, and the flame-retardant durability of the composite material is enhanced.

The application discloses a liquid titanium-based polyester catalyst and a preparation method thereof, and relates to the field of titanium-based catalysts. The catalyst takes titanate as a main raw material and is prepared through modification of an ionic liquid coordination modification; the modified ionic liquid is prepared through quaternary ammonium and ion exchange reactions and is composed of imidazole cations, phosphoric acid groups and bistrifluoromethylsulfonylimide anions. The preparation method comprises the following steps: first, an intermediate chloride is prepared through quaternary ammonium reaction of N-methyl imidazole and 3-chloropropyl phosphoric acid diethyl ester; then, the modified ionic liquid is obtained through ion exchange reaction to replace anions; finally, the modified ionic liquid is subjected to coordination reaction with the titanate to prepare the liquid titanium-based polyester catalyst. The liquid titanium-based polyester catalyst prepared by the application has excellent hydrolysis resistance, catalytic activity and thermal stability performance and is suitable for the industrial production requirements of the polyester.

The application discloses a preparation method and application of a silane passivator containing diethyl phosphate groups. The preparation method comprises the following steps: heating and stirring allyl diethyl phosphate and hydrogen-containing silicone oil under an argon atmosphere; adding hydrogen-containing silicone oil, toluene and a catalyst chloroplatinic acid into the system in sequence, and heating and reacting under the Ar atmosphere; performing reduced pressure distillation until no distillate is evaporated; adding ethyl acetate into the reaction liquid for washing, and then evaporating the ethyl acetate under reduced pressure; finally, washing the reaction liquid for several times, pouring out the organic phase, and then performing reduced pressure distillation until no distillate is evaporated, so that the silane passivator containing diethyl phosphate groups is obtained. The silane passivator is stable in chemical properties and convenient to store. After the passivator is used to passivate perovskite, the ethoxy group of the passivator can endow the passivator with certain electronic transport capacity, and a phosphorus oxygen (P=O) double bond can be combined with uncoordinated lead ions (Pb 2+ ) to coordinate, so that the crystal structure is perfected, non-radiation recombination is inhibited, and the optical properties and stability of the perovskite material are effectively improved.

The invention discloses a flame-retardant gel polymer electrolyte and a preparation method and application thereof, and belongs to the technical field of supercapacitors. The method comprises the following steps: adding iodine diethyl methyl phosphate and 1, 3-propane sultone into an organic solvent containing 1, 3-dioxolane, and uniformly mixing to obtain a mixed solution; adding lithium salt into the mixed solution to obtain a precursor solution; and dropwise adding the precursor solution on the surface of an electrode to assemble a supercapacitor, and heating to form the flame-retardant gel polymer electrolyte on the surface of the electrode in situ. According to the flame-retardant gel polymer electrolyte prepared by the method, the flame-retardant characteristic of the electrolyte can be remarkably improved, the combustion risk is fundamentally eradicated, a good solid-liquid mixed interface can be formed with an electrode, and high ionic conductivity and low interface impedance are guaranteed.

This invention discloses a method for detecting genotoxic impurities in fosfomycin calcium. The method involves preparing a test solution and a reference solution using hydrochloric acid as a solvent, and then detecting the test solution and reference solution using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS / MS) to obtain the content of genotoxic impurities in fosfomycin calcium. The genotoxic impurities are: 1,2-epoxypropyl diethyl phosphate, (2-propenyl)-diethyl phosphate, allyl diethyl phosphate, and propyl diethyl phosphate. This invention develops an analytical method capable of simultaneously detecting four diethyl phosphonate genotoxic impurities in fosfomycin calcium. This method exhibits good specificity, injection precision, linear range, limit of quantitation, limit of detection, accuracy, repeatability, intermediate precision, and robustness. It can be used for the detection and monitoring of diethyl phosphonate impurities in fosfomycin calcium raw materials, ensuring product quality and improving the safety of clinical medication.

This invention discloses an antibacterial air filter material and its preparation method, relating to the field of filter material technology. In preparing the antibacterial air filter material, terephthalaldehyde is reacted sequentially with 2-aminobenzimidazole and diethyl phosphite to obtain a phosphorus-nitrogen composite flame retardant; silica is reacted sequentially with γ-glycidyl etheroxypropyltrimethoxysilane and 1-hydroxymethyl-5,5-dimethylhydantoin to obtain modified silica; the modified silica is chlorinated with sodium hypochlorite to obtain haloaminated silica; 70-80 parts of polyacrylonitrile, 5-6 parts of the phosphorus-nitrogen composite flame retardant, and 3-4 parts of haloaminated silica are formulated into a spinning solution, and electrospinned to obtain a polyacrylonitrile fiber membrane; the polyacrylonitrile fiber membrane is reacted sequentially with ethylenediamine and curcumin to obtain the antibacterial air filter material. The antibacterial air filter material prepared by this invention has the advantages of both antibacterial and flame retardant properties.

The invention relates to the field of sodium ion batteries, and discloses an electrolyte for a sodium ion battery and a preparation method thereof, the electrolyte for the sodium ion battery comprises a sodium salt, an organic solvent and a composite additive; the composite additive is formed by mixing fluoroethylene carbonate and a modified additive according to the mass ratio of (1-3): 1; the modified additive is prepared by the following steps: reacting 2-cyano-6-hydroxybenzothiazole with liquid bromine to generate 2-cyano-6-hydroxy-5-bromobenzothiazole, then carrying out substitution reaction on phenolic hydroxyl group in the 2-cyano-6-hydroxy-5-bromobenzothiazole and diethyl chlorophosphate, and then under the catalysis of bis (triphenylphosphine) palladium dichloride and cuprous iodide, carrying out substitution reaction on the phenolic hydroxyl group in the 2-cyano-6-hydroxy-5-bromobenzothiazole and diethyl chlorophosphate to obtain the modified additive. According to the invention, the electrolyte with a good flame retardant effect is prepared by adding the modified additive, and the sodium-ion battery is endowed with good capacity performance and cycle performance by carrying out a coupling reaction on the prepared 2-cyano-6-diethyl phosphate 5-bromobenzothiazole and trimethylsilylacetylene.

The present invention relates to a process for the continuous flow preparation of a mixture of isomers of hexa-1,3-dien-1-yl-diethylphosphate mainly composed of the (E,Z) isomer and essentially free of the (E,E) isomer.

This invention belongs to the field of inorganic nanoparticle technology, and discloses a silicon-phosphorus-containing inorganic nanoparticle, its preparation method, and its application. The silicon-phosphorus-containing inorganic nanoparticle is prepared from inorganic nanoparticles, a phosphorus-containing compound, and a silane coupling agent. The inorganic nanoparticles are selected from at least one of nano-ZrO2, nano-CaCO3, nano-SiO2, and nano-TiO2. The phosphorus-containing compound is selected from at least one of dimethyl phosphite, diethyl phosphite, and diphenyl phosphite. The silane coupling agent is selected from γ-glycidoxypropyltrimethoxysilane and / or γ-glycidoxypropyltriethoxysilane. The silicon-phosphorus-containing inorganic nanoparticles of this invention, due to surface modification, have significant steric hindrance, are not prone to aggregation, and can be well dispersed in a matrix. The inorganic nanoparticles contain silicon and phosphorus, and have a certain flame-retardant effect.

The invention relates to the technical field of research, development and manufacturing of functional films, and discloses an eleven-layer co-extruded film, a preparation process and application in aviation cables, and the preparation process specifically comprises the following steps: by taking heptamethyl hydrogen-containing POSS, diallylamine, diethyl phosphite and 10-undecenal as raw materials, carrying out hydrosilylation, Kabachnik-Fields and alkenyl epoxidation reaction to obtain the eleven-layer co-extruded film. The preparation method comprises the following steps: synthesizing a halogen-free reaction type phosphorus-POSS-nitrogen synergistic flame retardant, and carrying out covalent bond interaction on the halogen-free reaction type phosphorus-POSS-nitrogen synergistic flame retardant and amino-terminated functional groups in PA6 resin and PA66 resin through an epoxy-amino ring-opening reaction to prepare flame-retardant PA master batches; the flame-retardant PA master batch is used as a raw material of the eleven-layer co-extrusion film, and an eleven-layer co-extrusion blow molding process is adopted to prepare the eleven-layer co-extrusion film. The flame retardant property of the eleven-layer co-extrusion film is remarkably improved, and meanwhile, the beneficial technical effect of remarkably enhancing the high-temperature resistance of the eleven-layer co-extrusion film is achieved.

The invention provides a preparation method and a preparation device of a phosphine aldehyde intermediate and glufosinate-ammonium. The preparation method comprises the following steps: mixing acrolein with an auxiliary agent, freezing at low temperature, settling and layering to obtain pretreated acrolein, mixing the pretreated acrolein with acetic acid to obtain a first mixed solution, mixing the first mixed solution with diethyl methylphosphite, performing condensation reaction to obtain acetal, and hydrolyzing the acetal to obtain the phosphine aldehyde intermediate. According to the method, acrolein is pretreated in a low-temperature freezing mode, side reactions can be effectively inhibited, and the product yield is increased. Furthermore, a circulation condensation reaction mode is adopted, the reaction heat is effectively diluted through circulation of a large amount of materials, the condensation reaction temperature is stabilized, and the reaction yield is increased. Experimental results show that according to the method provided by the invention, the yield of phosphine aldehyde is increased to 96%, and the yield of glufosinate-ammonium is increased to 88%.

The invention discloses low-metal-corrosion flame-retardant plywood and a preparation method thereof. The plywood comprises a base material which is formed by sequentially and alternately overlapping modified veneers and resin layers; a preparation method of the modified veneer comprises the following steps that the veneer is sequentially placed in a 0.05 mol / L to 0.2 mol / L amino silane coupling agent solution and a 0.06 mol / L to 0.3 mol / L allyl salicylaldehyde solution to be subjected to pressure dipping; then the veneer is placed in a comonomer solution, an initiator is added, the temperature is raised, a free radical copolymerization reaction is carried out, and the composite material is obtained, and comonomers comprise diethyl allyl phosphate and a vinyl nitrogen-containing heterocyclic ring; the concentration of the diethyl allyl phosphate in the comonomer solution is 0.1 mol / L to 0.5 mol / L, and the concentration of the vinyl nitrogen-containing heterocyclic ring in the comonomer solution is 0.05 mol / L to 0.3 mol / L. According to the invention, the problems of low anchoring force between the flame retardant and the plate, easy dissolution loss in a humid and hot environment, poor flame-retardant persistence and serious metal corrosion in the current dipping flame-retardant treatment process of the plate can be solved.

The application discloses a kind of high-temperature-resistant flame-retardant fluororubber composite material for switchgear and a preparation method thereof, and relates to the technical field of fluororubber.The application uses gamma ray co-irradiation method to graft polyvinyl fluoride with diethyl allyl phosphate, and reacts with high methyl vinyl silicone rubber under the action of triallyl phosphate to form a dense three-dimensional hybrid network, increase the phonon scattering resistance to reduce the heat conduction efficiency, and the phosphorus component and the silicon rubber combustion product synergistically form a gas-solid dual flame-retardant barrier.The application grafts talc powder with vinyltriethoxysilane and modifies it by radiation and polymerization with diethyl vinylphosphonate to obtain a lamellar filler, delays heat transfer, and induces the directional formation of carbon layer to form a "lamellar-glass-carbon" composite barrier layer.The surface modification increases the specific surface area, improves the efficiency of free radical capture, and the hybrid crosslinking point formed by graft copolymerization and the matrix network form a double phonon scattering barrier.The high-temperature-resistant flame-retardant fluororubber composite material for switchgear prepared by the application has the effects of high-temperature resistance and flame retardance.

The application discloses a self-repairing magnetic lubricating composition and a preparation method thereof, and relates to the technical field of lubricating oil.The application prepares imidazole ionic liquid containing a double bond in a side chain by subjecting diethyl allylphosphonate and 1-(3-aminopropyl)imidazole to a quaternary amination reaction, and then subjecting the imidazole ionic liquid to reaction with 3-mercapto propionic acid to form ionic liquid containing amino and carboxyl; the ionic liquid can form an amide crosslinking between adjacent molecules in high-temperature friction, the ionic liquid monomer is converted into a polymer network, cracks or pits are filled, and the self-repairing function is realized; then mesoporous ferroferric oxide is selected as a magnetic response component, the ionic liquid containing amino and carboxyl is pre-adsorbed, a magnetic field is applied, the magnetic response component is induced to be directionally enriched to a contact area of a friction pair and a micro-damage site, the ionic liquid is released at a fixed point, and through compounding of the magnetic response component and a polar anchoring monomer, the oil film stability is improved by using the synergistic effect of magnetic induction and polar adsorption.

The application relates to the field of sodium ion batteries, and discloses an electrolyte for a sodium ion battery and a preparation method thereof. The electrolyte for the sodium ion battery comprises a sodium salt, an organic solvent and a composite additive. The composite additive is formed by mixing fluorinated ethylene carbonate and a modified additive at a mass ratio of 1-3:1. The modified additive is prepared by the following steps: 2-cyano-6-hydroxybenzothiazole is reacted with liquid bromine to generate 2-cyano-6-hydroxy-5-bromobenzothiazole, then a substitution reaction is performed on the phenolic hydroxyl group in the 2-cyano-6-hydroxy-5-bromobenzothiazole and diethyl chlorophosphate, and then, under the catalysis of bis-triphenylphosphine palladium dichloride and cuprous iodide, a coupling reaction is performed on the prepared 2-cyano-6-diethyl phosphate-5-bromobenzothiazole and trimethylsilylethine to generate the modified additive. The electrolyte with good flame-retardant effect is prepared by adding the modified additive, and the sodium ion battery has good capacity performance and cycle performance.

The invention discloses a rapid cyanogenic glycoside detection kit and a detection method, and belongs to the technical field of agricultural product detection. The kit comprises an enzymolysis reaction reagent and a hydrocyanic acid detection reagent, the enzymatic hydrolysis reaction reagent is prepared from beta-glucosidase, 1-ethyl-3-methylimidazole diethyl phosphate salt and rhamnolipid, and the enzymatic hydrolysis reaction reagent is prepared from beta-glucosidase, 1-ethyl-3-methylimidazole diethyl phosphate salt and rhamnolipid; the hydrocyanic acid detection reagent comprises a picric acid test strip, tartaric acid and a saturated sodium carbonate solution. The detection method comprises the following steps: adding an enzymolysis reaction reagent into a sample to be detected, hydrolyzing cyanogenic glycoside into cyanide, and adding tartaric acid to convert into volatile hydrocyanic acid; a picric acid test strip wetted by a saturated sodium carbonate solution is used for adsorption, and hydrocyanic acid and sodium picrate on the test strip act to generate sodium isocyanurate; and observing the color change of the test strip for qualitative and / or quantitative detection. The detection kit provided by the invention is convenient and rapid, has a short detection period, and is convenient for timely detection in links of agricultural product production, processing, storage, sales and the like.

The application belongs to the field of organic synthesis, and particularly relates to a synthesis method of TMS protected alkyne. An alkyl amide derivative shown in formula 1 and N,N-dimethylformamide shown in formula 2 are mixed with an organic solvent (tetrahydrofuran) in the presence of a strong base (lithium bis(trimethylsilyl)amide) and an activating agent (diethyl chlorophosphate), and a reaction is performed to synthesize TMS protected alkyne shown in formula 3. The raw materials used in the application are common chemicals on the market. The application has a wide range of applications, and not only can common TMS protected alkyne compounds be synthesized, but also a series of TMS protected alkyne derivatives can be synthesized according to the need of adjusting the reaction substrate. This provides certain support for the research in the fields of medicine, material science and the like.

The invention discloses a preparation method of a low-VOC (volatile organic compound) polyurethane structural adhesive, and relates to the technical field of adhesives. The low-VOC polyurethane structural adhesive prepared by the invention comprises a component A and a component B, wherein the component A is prepared from castor oil, polyester glycol, a dimethyl alcohol composite flame retardant, modified aluminum oxide and a catalyst; the component B is prepared from an isocyanate terminated prepolymer, polymethylene polyphenyl polyisocyanate and a water removal agent; the dimethyl alcohol composite flame retardant is prepared by carrying out a reaction on 5-(aminomethyl)-2-furfuryl alcohol, 5-hydroxymethylfurfural and diethyl phosphite; the modified aluminum oxide is prepared by sequentially reacting aluminum oxide with aminopropyltriethoxysilane, triglycidyl isocyanurate and 4-(2H-benzo [D] [1, 2, 3] triazole-2-yl) benzene-1, 3-diol, and the modified aluminum oxide is prepared by sequentially reacting aluminum oxide with aminopropyltriethoxysilane, triglycidyl isocyanurate and 4-(2H-benzo [D] [1, 2, 3] triazole-2-yl) benzene-1, 3-diol. The low-VOC polyurethane structural adhesive prepared by the invention has the advantages of flame retardance, heat conduction and ultraviolet aging resistance.

The invention discloses a biochar material for recycling rare and precious metals from waste solar cells and a preparation method of the biochar material, and relates to the technical field of biochar materials. When the biochar material for recycling the rare and precious metals from the waste solar cells is prepared, firstly, biomass raw materials are dried, smashed, carbonized and carboxylated, and then biochar is prepared; growing a metal organic framework on the surface of the biochar in situ to prepare metal organic framework modified biochar; enabling the metal organic framework modified biochar to react with paraformaldehyde and diethyl phosphite to prepare phosphating modified biochar; reacting the phosphatized modified biochar with 3-bromopropylene to obtain modified biochar; and coating the surface of the modified biochar with an ion imprinting layer to prepare the biochar material for recycling rare and noble metals from waste solar cells. The biochar material for recycling rare and precious metals from waste solar cells prepared by the invention has the advantages of selective ion adsorption, high adsorption capacity and recyclability.