369 results about "Isocyanuric acid" patented technology

The invention relates to a composite nanodot loaded porous carbon nitride photocatalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: calcining a precursor formed by mixing melamine, cyanuric acid and trithiocyanuric acid to obtain porous carbon nitride, and loading cobalt oxide nanodots and nickel nanodots on the porous carbon nitride in two steps, the composite nanodot loaded porous carbon nitride photocatalyst with excellent visible light catalytic hydrogen production performance is obtained; when the composite nanodot loaded porous carbon nitride photocatalyst obtained by the method is used for photocatalytic hydrogen production, an activity test result shows that the activity of the photocatalyst prepared by the method is improved by 222.5 times compared with that before modification; the preparation method disclosed by the invention has the advantages of high reaction efficiency and good performance of the obtained photocatalyst, and has a wide application prospect.

The invention discloses a high-molecular-weight phosphamide aggregate flame retardant and a preparation method thereof.The method comprises the steps that phosphoryl dichloride compounds and piperazine anhydrous serve as raw materials, an amino-terminated phosphamide polymer is synthesized through a condensation reaction, and the phosphamide polymer flame retardant is obtained. The high-molecular-weight phosphamide aggregate flame retardant is obtained through a ring-opening reaction of amino-terminated groups and epoxy groups between the high-molecular-weight phosphamide aggregate flame retardant and triglycidyl isocyanurate. Compared with an existing small-molecule flame retardant, the flame retardant is higher in thermal stability, better in compatibility with a high polymer material matrix, not prone to migration and capable of achieving synergistic flame retardance due to the fact that the flame retardant contains phosphorus and nitrogen structural units at the same time, and when the prepared flame retardant is added into TPU, PC, EP, PET and other transparent matrixes, the flame retardance is improved. The flame retardant property of the transparent base material can be improved, and meanwhile, good mechanical property and high light transmittance can be kept. In addition, the preparation method disclosed by the invention is simple and easy to control, high in yield, wide in source of required raw materials, easy for industrial production and wide in industrial application prospect.

The invention discloses a preparation method of ulinastatin adsorption resin, and belongs to the technical field of adsorption resin. Comprising the following steps: (1) preparing a water phase: adding pure water, gelatin, cellulose, sodium chloride and lignin into a reaction kettle until the materials are fully dissolved; (2) preparing an oil phase, wherein the oil phase contains divinylbenzene, methyl acrylate, benzoyl peroxide, tert-butyl peroxy-2-ethylhexanoate, triallyl isocyanurate, tripropanol alkyl trimethacrylate and methylbenzene, and the oil phase is uniformly stirred and mixed with the methylbenzene and the trivinylbenzene, the methyl acrylate, the benzoyl peroxide, the tert-butyl peroxy-2-ethylhexanoate, the triallyl isocyanurate, the tripropanol alkyl trimethacrylate and the methylbenzene; (3) suspension polymerization: putting the oil phase into the water phase, and carrying out staged heating reaction; (4) amination reaction; (5) alkylation reaction; and (6) acid-base alcohol treatment. Compared with the existing resin, the resin disclosed by the invention has the characteristics of high adsorption exchange rate, high desorption rate and high desorption concentration on ulinastatin, and the yield of ulinastatin is increased by 1.17 times compared with that of D215 resin.

The invention discloses a surface defect and oxygen doping co-modified pore-rich g-C3N4 nano material as well as preparation and application thereof. The preparation method comprises the following steps: mixing a white viscous melamine-cyanuric acid suspension with an oxalic acid solution to obtain a melamine-cyanuric acid-oxalic acid suspension solution, carrying out hydrothermal treatment to obtain a hydrogen bond connected self-assembled supramolecular aggregate, and finally carrying out thermal polycondensation on the self-assembled supramolecular aggregate and formaldehyde to obtain the surface defect and oxygen doping co-modified porous g-C3N4. The surface defect and oxygen doping co-modified g-C3N4 nano material with different morphologies and physicochemical properties is obtained. The preparation method is simple in process flow, efficient, low in cost and suitable for large-scale production, and the synthesis process meets the green chemical requirement; the obtained nano material has a higher specific surface area and more active sites, and has higher catalytic reaction and adsorption performance on organic pollutants, namely levofloxacin, ciprofloxacin and tetracycline hydrochloride, in a water body.

The present invention discloses a high- and low-temperature resistant environmentally friendly water-based polyurethane coating and a preparation method thereof, belonging to the technical field of chemical coatings. The preparation method comprises: reacting isophorone diisocyanate with cyanuric acid at 80-90°C to generate a prepolymer containing a triazine ring cross-linked network; adding hyperbranched polycaprolactone to the prepolymer, and vacuum dehydrating the prepolymer to form a mixed prepolymer; using dimethylolpropionic acid to extend the chain and neutralizing it with triethylamine, adding a coating additive and shearing and emulsifying to obtain a high- and low-temperature resistant environmentally friendly water-based polyurethane coating. Through the synergistic effect of the rigid triazine ring network and the hyperbranched chain segments, the coating has both brittle crack resistance and creep resistance over a wide temperature range; the amphiphilic chain extender ensures emulsion stability and low VOC content.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a hyperbranched flame retardant, a preparation method thereof and flame-retardant epoxy resin. The specific preparation method comprises the following steps: in a solvent system, placing itaconic anhydride and phosphaphenanthrene at 80-110 DEG C, and carrying out an addition reaction to obtain a first intermediate; mixing phosphorus oxychloride and 1, 3, 5-tris (2-ethoxyl) cyanuric acid in a solvent system, and carrying out nucleophilic substitution reaction under the action of an acid-binding agent to obtain a second intermediate; carrying out esterification reaction on the first intermediate and the second intermediate at 80-120 DEG C to obtain a phosphorus-nitrogen intermediate; and under a protective atmosphere, placing the phosphorus-nitrogen intermediate and boric acid at 120-160 DEG C, and carrying out a condensation reaction to obtain the hyperbranched flame retardant. The flame-retardant epoxy resin prepared by using the hyperbranched flame retardant prepared by the invention not only has excellent flame retardant property, but also has the characteristics of high strength and high toughness.

The invention relates to the technical field of high polymer materials and protective coatings, and discloses a single-layer anti-ultraviolet heavy-duty powder coating as well as a preparation method and application thereof. The preparation method of the single-layer anti-ultraviolet heavy anti-corrosion powder coating comprises the following steps: adding carboxyl polyester resin, triglycidyl isocyanurate, modified nano silicon dioxide, modified chitosan, 2-(2H-benzotriazole-2-yl)-4, 6-di-tert-pentylphenol, bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, flaky aluminum powder, zinc phosphate, BYK-3920, 2-hydroxy-1, 2, 4-triazole-2-yl)-1, 3, 4-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5- The preparation method comprises the following steps: stirring and mixing 2, 2-diphenylethanone and gamma-aminopropyltriethoxysilane at room temperature at 300-350rpm for 10-15min to obtain a mixture, extruding the mixture through a double-screw extruder at the extrusion temperature of 110-120 DEG C and the screw rotation speed of 450-500rpm, and grinding to obtain the single-layer anti-ultraviolet heavy-duty anticorrosive powder coating. The single-layer anti-ultraviolet heavy anti-corrosion powder coating can be applied to metal base material protection. The coating prepared by the invention has good ultraviolet resistance and corrosion resistance.

The invention discloses a preparation method and application of an iron carbide nanoparticle modified carbon-based Fe monatomic catalyst, in the preparation process, Fe < 3 + > is complexed with oxalic acid in advance to realize coordination self-assembly and effectively inhibit hydrolysis of Fe < 3 + >, and glucose is used as a carbon-based carrier precursor and a reducing agent to prepare a carbon-based Fe monatomic catalyst. According to the preparation method, the self-assembled iron species are converted into Fe3C nanoparticles at a high temperature, melamine and cyanuric acid are used as N sources to realize N-doped carbon and anchor part of the iron species to form Fe monatomic atoms, and in addition, oxalic acid, melamine and cyanuric acid are easy to decompose at the high temperature to generate small-molecule gas, so that glucose forms a porous carbon structure during high-temperature carbonization, and the porous carbon structure is formed. Finally, Fe3C and Fe monatomic synergistic coexistence hierarchical porous N-doped composite carbon-based catalyst is achieved, the obtained catalyst can efficiently activate peracetic acid and degrade phenol organic pollutants, and the catalyst is simple in preparation process, good in catalytic effect and high in stability and has wide application potential.

The invention relates to the technical field of foaming materials, in particular to a high-damping EVA / EPDM composite foaming material and a preparation method thereof. The high-damping EVA / EPDM composite foam material is prepared from the following raw materials in parts by weight: 150 to 80 parts of ethylene-vinyl acetate copolymer, 20 to 50 parts of ethylene propylene diene monomer, 3 to 5 parts of azodicarbonamide, 1 to 3 parts of dicumyl peroxide, 10 to 12 parts of compound filler, 6 to 10 parts of maleic anhydride grafted ethylene-octylene copolymer, 2 to 4 parts of hydroxyl-terminated polybutadiene and 1 to 4 parts of triallyl isocyanurate, the compound filler is formed by compounding silicon dioxide microspheres, graphene aerogel microspheres and modified barium titanate nanoparticles according to the mass ratio of 1: (1.5-1.7): (1.5-1.8); the high-damping EVA / EPDM composite foam material prepared by the invention not only has better high-damping and low-resilience properties, but also has excellent tensile strength, and the quality of the high-damping EVA / EPDM composite foam material is effectively ensured.

The invention belongs to the technical field of flame-retardant master batches, and particularly relates to a flame-retardant master batch for polypropylene and a preparation method thereof.The preparation method comprises the steps that tris (2-hydroxyethyl) isocyanurate is heated and molten, tetrabutyl titanate and DOPO-DPP are added into the molten tris (2-hydroxyethyl) isocyanurate, the mixture reacts for 3-4 h, melamine and cyanuric acid are added into the molten tris (2-hydroxyethyl) isocyanurate, the mixture reacts for 30 min, cooling and smashing are conducted, and a macromolecular flame retardant TDMC is obtained; the preparation method comprises the following steps: carrying out ester exchange reaction on 2, 4-diphenyl-6-[2-hydroxy-4-(ethoxycarbonyl methoxy) phenyl]-1, 3, 5-triazine and 2, 2, 6, 6-tetramethyl piperidinol to prepare a free radical capturing agent; the polypropylene, the TDMC, the free radical scavenger and the zeolite are put into a high-speed mixer to be stirred and mixed, and then extrusion granulation is performed. The macromolecular flame retardant TDMC is adopted, the molecular weight of the macromolecular flame retardant TDMC is large, the water resistance is good, and the compatibility and damp-heat stability of the flame-retardant master batch in polypropylene are improved.

The invention belongs to the technical field of methyl red azo dye purification, and discloses a methyl red azo dye adsorbent with good adsorption performance on a methyl red azo dye adsorbent, and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a first precursor solution and a second precursor solution; the first precursor solution contains melamine, and the second precursor solution contains cyanuric acid and / or barbituric acid; (2) sequentially adding the first precursor solution and the second precursor solution into biomass carbon powder to form a reaction solution; enabling the supermolecule aggregate to grow in situ and coat the surface of the biomass carbon powder under a stirring condition to form a solid-liquid mixture; removing the solvent in the solid-liquid mixture, and drying to obtain a supramolecular composite precursor; (3) carrying out pressure molding on a mixture of the supramolecular composite precursor, silicate clay mineral and nickel salt to obtain a green body; and (4) carrying out heat treatment on the green body to obtain the methyl red azo dye adsorbent.

The invention belongs to the technical field of catalyst preparation, and relates to yttrium monatomic in-situ co-doped carbon nitride as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing an yttrium-containing carbon nitride precursor from melamine, cyanuric acid, an organic carbon source and yttrium nitrate hexahydrate as raw materials by adopting a precipitation method; s2, performing thermal polymerization reaction on the yttrium-containing carbon nitride precursor under an inert gas condition to obtain a crude product; and S3, ultrasonically dispersing the crude product in a nitric acid solution for etching, and then washing and drying to obtain the yttrium monatomic in-situ co-doped carbon nitride Y-C-C3N4. The yttrium monatomic in-situ co-doped carbon nitride prepared by the method has high catalytic activity and high stability, and the photocatalytic reduction capacity of carbon dioxide is improved.

The invention discloses a preparation method of a polymer carbon nitride / tin sulfide (PCN (at) SnS2) heterojunction photoanode, which comprises the following steps of: constructing the PCN (at) SnS2 heterojunction photoanode in situ on a conductive substrate (FTO) by combining an electrochemical deposition method and a chemical vapor deposition method, adding anhydrous stannous chloride into ethanol for dissolving, spin-coating stannous ions on the surface of the conductive substrate, and oxidizing in an air atmosphere; the preparation method comprises the following steps: adding stannous sulfate and sodium citrate into deionized water, and stirring for dissolving; the prepared conductive substrate is used as a working electrode, and a tin film is deposited on the surface of the conductive substrate by adopting a three-electrode system; dicyandiamide, cyanuric acid and potassium thiocyanate are ground and mixed evenly and then put into a porcelain boat, and the conductive substrate deposited with the tin film is placed on the surface of the precursor and wrapped with aluminum foil; placing the porcelain boat in a tubular furnace, reacting in a nitrogen atmosphere, and cooling to room temperature to form PCN-coated SnS2 on the surface of the FTO. The method improves the problems of insufficient light absorption range and high electron-hole recombination rate of the polymer carbon nitride material, and has the advantages of simplicity, controllability and the like.

The invention relates to a high-performance flame-retardant nylon 6 and a preparation method thereof. The high-performance flame-retardant nylon 6 comprises caprolactam, cyanuric acid, cyanuric acid, a caprolactam hydrolysis ring-opening polymerization initiator, a polymer structure regulator, an impact modifier, and a flame-retardant dispersant. During the caprolactam hydrolysis ring-opening polymerization process, melamine and cyanuric acid are added as two raw materials to participate in the chemical reaction of nylon 6 molding and are connected to the molecular chain of nylon 6. A polymer regulator and an anti-modification impact agent are further added to prepare high-performance flame-retardant nylon 6 with UL94V-0 flame retardancy, better impact strength, excellent tensile properties, and lower cost in a one-step process.

The present invention relates to a polymer composition comprising: a) an ethylene-based copolymer; b) > = 0.1 wt% and < = 5.0 wt%, preferably > = 0.1 wt% and < = 1.0 wt%, of a crosslinking agent; c) > = 0.05 wt% and < = 5.0 wt%, preferably > = 0.05 wt% and < = 0.5 wt%, of a coupling agent, preferably a silane coupling agent; d) more than or equal to 0.05 wt% and less than or equal to 5.0 wt%, preferably more than or equal to 0.05 wt% and less than or equal to 1.0 wt% of an auxiliary agent, preferably an auxiliary agent containing a phosphate moiety, an isocyanurate moiety or a cyanurate moiety; wherein all wt% are based on the total weight of the polymer composition; and wherein the ethylene-based copolymer has a vinyl unsaturation content of > = 6.0 / 105 carbon atoms, preferably > = 7.0 / 105 carbon atoms, preferably > = 12.0 / 105 carbon atoms, more preferably > = 12.0 and < = 20.0 / 105 carbon atoms, even more preferably > = 12.0 and < = 15.0 / 105 carbon atoms, when determined according to ASTMD6248-98 (2012). Such a polymer composition allows a desirably long initial stage in curing, thereby allowing flexibility in thermoplastic molding, desirably short curing period, thereby reducing the cycle in the production of packaged solar cell modules while also achieving high degree of crosslinking of the packaging material.

The application discloses oligomerization degree carbon nitride nanosheet containing partial supramolecular chains and a preparation method and application of photocatalytic decomposition of water to simultaneously produce hydrogen and oxygen, and the preparation method comprises the following steps: adding melamine and cyanuric acid into a solvent, stirring after ultrasonic treatment, and drying to obtain supramolecular precursor powder; and calcining the supramolecular precursor powder to obtain oligomerization degree carbon nitride containing partial supramolecular chains. The application retains partial supramolecular oxygen-containing structures to optimize adsorption and dissociation of oligomerization degree carbon nitride nanosheet and water molecules at a reaction liquid interface, realizes high H and OH enrichment of a local environment, and promotes performance improvement of photocatalytic complete decomposition of water.

The invention provides a cyanuric acid-containing halamine / quaternary ammonium salt copolymerization modified antibacterial material and application, and relates to the technical field of antibacterial materials. 1-allyl-s-triazine-2. 4.6-triketone potassium salt is synthesized from the cyanuric acid-containing halamine / quaternary ammonium salt copolymerization modified antibacterial material through nucleophilic substitution; the preparation method comprises the following steps: grafting a chlorinated halamine / quaternary ammonium salt copolymer to 3-chloropropyltrimethoxysilane pretreated natural fiber, copolymerizing the modified fiber and dimethyl ethyl methacrylate through continuous steps, reacting in ethanol with alkyl bromide, and substituting in a disinfectant to obtain the chlorinated halamine / quaternary ammonium salt copolymer modified material. The cyanuric acid-containing halamine / quaternary ammonium salt copolymerization modified antibacterial material prepared by the invention can quickly and efficiently kill escherichia coli and staphylococcus aureus, and has good recovery and regeneration capacity, ultraviolet radiation resistance and self-cleaning capacity.

The invention discloses a chlorine-nitrogen co-coordinated monatomic zirconium adsorbent and application thereof in selective defluorination of high-salinity wastewater, and belongs to the technical field of fluorine-containing wastewater treatment. The preparation method comprises the following steps: self-assembling melamine and cyanuric acid to obtain supramolecules, ball-milling the supramolecules and zirconium chloride, and pyrolyzing twice to obtain the chlorine-nitrogen co-coordinated monatomic zirconium adsorbent. According to the adsorbent, strong electrostatic repulsion is applied to oxygen-containing acid radicals through electronegative nitrogen ligands, and strong coordination is applied to fluorine ions through electropositive zirconium atoms, so that selective capture of low-concentration fluorine ions in high-salinity wastewater is realized. Compared with a traditional adsorbent, the prepared adsorbent has the advantages of being high in fluorine removal capacity, high in salt tolerance and the like, can overcome the defects that a conventional chemical precipitation method, a coagulation method and a flocculation method are large in agent dosage, high in hazardous waste yield, high in treatment cost and the like, and has a wide application prospect.

The application relates to a preparation method and application of a hard carbon negative electrode material, and comprises the following steps: 1) dissolving an epoxy resin derivative and an amine catalyst in an organic solvent to obtain a mixture, ultrasonically dispersing alkali-activated biomass powder in the mixture, and performing reaction by increasing temperature to obtain modified biomass powder; the epoxy resin derivative comprises phenolic epoxy resin and isocyanuric acid triglycidyl ester; 2) carbonizing the modified biomass powder. The reaction in step 1) is used for reinforcing the easily-oxidized and weakly-connected structure on the alkali-activated biomass powder, so that the modified biomass powder with enhanced crosslinking degree and a complex three-dimensional crosslinking structure is obtained; and the modified biomass powder is carbonized in step 2). The hard carbon negative electrode material obtained by the method makes the battery have excellent cycle stability.

The invention discloses a cyanuric acid wastewater resource utilization treatment method, and relates to the technical field of organic wastewater treatment.The cyanuric acid wastewater resource utilization treatment method is characterized by comprising the steps that the pH value and salt concentration of cyanuric acid-containing wastewater are adjusted, a precipitation reaction is performed at normal temperature till solid-liquid separation is performed, clear liquid and sodium cyanurate filter residues are obtained, and the sodium cyanurate filter residues are recycled; and carrying out suction filtration treatment on the clear liquid by using special resin to obtain suction filtration produced water, and treating the special resin subjected to suction filtration treatment by using regenerated liquid flow to obtain regenerated waste liquid and recycling the regenerated waste liquid. The method has the effects that sodium cyanurate is efficiently recycled, and a high-salt matrix is synchronously constructed to directly meet the requirements of ionic membrane raw materials; the special resin is high in adsorption capacity and regeneration efficiency, and regenerated waste liquid is recycled; the total nitrogen removal rate and the TOC removal rate are high after deep treatment of the electro-catalysis process, and the energy consumption is remarkably reduced compared with that of a traditional process; the resource utilization treatment method is free of secondary pollution, and the treatment cost is remarkably reduced compared with that of a traditional process.

The application discloses a nitrogen-doped carbon-coated three-metal catalyst and a preparation method and application thereof, and belongs to the field of catalyst preparation and application. The method adopts sucrose, melamine and metal salt as low-cost raw materials, and forms an alkaline environment with the assistance of sodium hydroxide. In the environment, melamine is hydrolyzed into cyanuric acid, which is complexed with sucrose metal ions to form a stable supramolecular aggregate precursor containing metal, and then realizes effective encapsulation of the metal in a high-temperature pyrolysis process. The synergistic effect of the three metal elements Co, Ni and Zn significantly improves the performance of the catalyst, so that CoNiZnO@NC-600 not only exhibits high conversion rate (98.4%) and selectivity (99%) in the reaction of hydrogenation conversion of furfural to furfuryl alcohol, but also has excellent cycle stability, thereby providing a new efficient method for the hydrogenation conversion of biomass-derived compounds.

The invention discloses a phosphorus-nitrogen-containing polymer coated high-nickel ternary positive electrode material and a preparation method thereof, and the method comprises the following steps: mixing a high-nickel ternary positive electrode material, dimethoxyphosphoryl methacrylate, isocyanuric acid tris (2-acryloyloxyethyl) ester, a free radical initiator and an organic solvent, and reacting while stirring under certain reaction conditions; after the reaction is completed, filtering to obtain a filter cake, washing twice with an organic solvent, and collecting a product; and drying the product in a vacuum drying oven until the quality is unchanged to obtain a final product. The coating amount of the phosphorus-nitrogen-containing polymer is less than or equal to 1.05%. Flame-retardant phosphorus and nitrogen elements are introduced into a coating layer of the prepared positive electrode material, so that the positive electrode material can be protected to slow down thermal decomposition, the positive electrode material and an electrolyte are isolated, and oxygen released by decomposition of the positive electrode material is inhibited from reacting with the electrolyte to release heat.

The application discloses a kind of low-noise water disaster resistant asphalt mixture and preparation method thereof, it is related to bitumen technical field.The mixture is composed of modified basalt porous ceramic hybrid aggregate and self-repairing gel modified asphalt material composite;Among them, modified basalt porous ceramic hybrid aggregate is crushed after basalt ore, by the synergistic effect of foaming agent, cosolvent, in the vacuum gradient sintering, carbon dioxide is inhaled to optimize pore structure, then by pickling, plasma activation and polyurethane impregnation strengthen mixed aggregate and filler are prepared;Self-repairing gel modified asphalt is three (2-mercaptoethyl) cyanuric acid ester as precursor, by thiol-epoxy click chemistry reaction to form crosslinked gel network, then with matrix asphalt composite;The scheme is through the acoustic wave dissipation of porous ceramic, hydrophobic interface and the dynamic self-repairing synergistic effect of gel network, significantly improve the water disaster resistance and noise reduction performance of mixture.

The invention belongs to the technical field of photocatalysts, and particularly relates to copper-doped graphite phase carbon nitride and a preparation method thereof.The preparation method comprises the following steps that A, cyanuric acid is dissolved in water, and a cyanuric acid solution is obtained after stirring; dissolving a chelating agent and copper salt in water, and stirring to obtain a copper source solution; the preparation method comprises the following steps: dissolving melamine in water, and stirring to obtain a melamine solution; b, adding the cyanuric acid solution into the copper source solution, and stirring to obtain a cyanuric acid-copper precursor solution; adding a melamine solution into the cyanuric acid-copper precursor solution, and stirring to obtain a self-assembled supramolecular precursor solution; c, sequentially centrifuging, washing and drying the self-assembled supramolecular precursor solution to obtain a self-assembled supramolecular precursor; and D, carrying out flash evaporation treatment on the self-assembled supramolecular precursor to obtain the copper-doped graphite phase carbon nitride. According to the copper-doped graphite phase carbon nitride and the preparation method thereof, the photocatalytic performance and the photocatalytic stability of the copper-doped graphite phase carbon nitride can be improved.

The utility model relates to tail gas purification technical field especially is a cyanuric acid synthetic reaction tail gas purification device, including the box, be provided with filter equipment on the box and be used for tail gas filtration, filter equipment includes: installation component, including the frame fixed in the inside of box, the front of upper and lower both ends of frame all is seted up and is inserted to install the composite catalytic filter core in the inside of frame, fixed component, including the fixed frame of installation in the inside front of frame, the inside intermediate rotation of fixed frame is installed with gear, the both ends of fixed frame inside left and right are all fixed with guide rod, the sliding installation of sleeve of guide rod is equipped with rack, the fixed plug rod is equipped with on the rack, the other end of plug rod is fixed with the bolt and is matched with the jack, the spring of sleeve installation is equipped with on guide rod, the front end fixed of gear has the knob, through fixed component and fix the composite catalytic filter core in installation component, significantly shorten the composite catalytic filter core replacement time, improve equipment operation efficiency.

The application discloses a kind of iron monatomic catalysts with controllable sulfur content and coordination mode and its preparation method and application, nitrogen-allyl thiourea and thiocyanic acid are respectively used as sulfur-containing organic ligand and sulfur-containing supramolecular precursor, chelate with iron ion, and use the hydrogen bond interaction between melamine and cyanuric acid, complete supramolecular self-assembly process;And high-temperature pyrolysis is carried out under argon atmosphere, and iron monatomic catalysts with controllable sulfur content and coordination mode can be prepared.The application also includes the application of iron monatomic catalysts with controllable sulfur content and coordination mode in removing organic pollutants such as p-chlorophenol and antibiotics in water.Iron monatomic catalysts with controllable sulfur content and coordination mode can improve the activation efficiency of persulfate, the content and selectivity of active oxygen species generated, and achieve efficient degradation of p-chlorophenol under different anion-cation, humic acid and pH conditions, while having good recycling performance.

The invention provides a preparation method of a melamine cyanuric acid coated phosphorus flame retardant and application of the flame retardant in flame-retardant waterborne polyurethane artificial leather. According to the preparation method, melamine cyanuric acid is coated on the surface of phosphorus flame retardant powder in an in-situ polymerization manner, and an ethanol-free solvent is used as a reaction medium in the reaction process, so that the preparation method has the advantages of environment friendliness, safety and high yield and conversion rate; and the phosphorus-based flame retardant coated with the melamine cyanuric acid has a synergistic effect on the flame retardant property.

The invention provides a low-platinum catalyst, a preparation method and application of the low-platinum catalyst in water electrolysis hydrogen production. Dispersing melamine and cyanuric acid in a certain proportion in absolute ethyl alcohol, adding the transition metal precursor solution, continuously stirring, heating, continuously reacting, cleaning, filtering, drying and grinding to obtain first solid powder; the first solid powder is placed in inert gas for carbonization treatment, and second solid powder is obtained; and dispersing the second solid powder in deionized water dissolved with a noble metal precursor, stirring for reaction, cleaning, filtering and drying to obtain the low-platinum catalyst. And the content of Pt in the catalyst is 0.1-10 wt%. The prepared low-platinum catalyst has excellent hydrogen evolution performance, the usage amount of precious metal can be effectively reduced, and the utilization efficiency of the precious metal is improved; the preparation method is simple in preparation procedure and relatively low in cost, can realize batch preparation, and has excellent market value and economic value.

The invention relates to the technical field of composite materials, and discloses a composition and a preparation method and application thereof, the composition comprises resin, conductive carbon black, a first antioxidant, a second antioxidant and a cross-linking agent; wherein the mass content of metal elements in the conductive carbon black is not more than 10 ppm; wherein the first antioxidant is 2, 4, 6-tri (3 ', 5'-di-tert-butyl-4 '-hydroxybenzyl) mesitylene and / or 1, 3, 5-tri (3, 5-di-tert-butyl-4'-hydroxybenzyl) isocyanuric acid, and the second antioxidant is 2, 4, 6-tri (3 ', 5'-di-tert-butyl-4 '-hydroxybenzyl) mesitylene. Wherein the second antioxidant is bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate and / or pentaerythritol tetra (3-lauryl thiopropionate), and the second antioxidant is a mixture of the first antioxidant and the second antioxidant. As a semiconductive shielding material, the composition provided by the invention not only has excellent insulation yellowing resistance, but also has excellent mechanical property and conductivity, and ensures better application of the material in preparation of power cables.

The invention discloses an electronic-grade cyanate ester prepolymer as well as a preparation method and application thereof. The preparation method comprises the following steps: in a protective atmosphere, melting a cyanate ester monomer at 140-160 DEG C, adding a catalyst, continuously stirring and reacting for 6-10 hours, cooling to 110-120 DEG C, or cooling to 60-75 DEG C, and adding a low-boiling-point solvent to prepare an electronic-grade cyanate ester prepolymer; wherein the catalyst comprises polyhydroxy alkyl melamine and / or polyhydroxy alkyl cyanuric acid. The cyanate ester prepolymer with excellent performance can be prepared under mild conditions, and the cyanate ester prepolymer has wide application prospects in the fields of electronic packaging substrates, copper-clad plates and aerospace.