3731 results about "Melamine" patented technology

The invention discloses an environment-friendly organic silicon intumescent fireproof coating for a transformer substation or a converter station as well as a preparation method and application of the environment-friendly organic silicon intumescent fireproof coating. The coating comprises the following raw materials in parts by mass: 30-60 parts of organic silicon resin, 30-45 parts of an intumescent flame retardant, 5-10 parts of modified glass powder, 2-20 parts of an inorganic filler, 2-10 parts of an auxiliary agent and 5-25 parts of a curing agent. The intumescent flame retardant takes a phosphazene compound as a gas source and an acid source; the phosphazene compound is prepared by carrying out nucleophilic substitution reaction on phosphonitrilic chloride trimer and melamine or dicyandiamide; the modified glass powder is prepared by mixing a plurality of glass powder with the melting point of 350-700 DEG C and then modifying by adopting a silane coupling agent. According to the invention, the high-temperature resistance of the organic silicon resin coating is improved through formula design, so that the service life of the steel in a high-temperature scene is prolonged, the performance reliability of fire-fighting equipment of a transformer substation or a converter station is improved, and the purpose of high-temperature resistance is achieved.

The invention relates to an antibacterial PP material and a preparation method thereof, and belongs to the technical field of high polymer materials. The antibacterial PP material is prepared from the following components in parts by weight: 60 to 80 parts of PP resin, 2 to 4 parts of a surfactant, 0.5 to 1.5 parts of a modified antibacterial agent, 0.5 to 1.5 parts of a flame retardant and 0.2 to 0.8 part of an antioxidant, titanium ions in the modified antibacterial agent destroy bacterial cell walls, quaternized intermediate products react with proteins of cell membranes to accelerate bacterial death, and in addition, phenolic hydroxyl groups absorb ultraviolet rays with different wavelengths to inhibit the light aging process; a compact and continuous carbon layer is formed during combustion of the flame retardant and cooperates with phosphorus-oxygen double bonds and melamine, the flame retardant efficiency is improved, aluminum hydroxide coats the surface, hydroxyl is subjected to heat absorption decomposition during combustion, the surface temperature of combustible materials is stabilized, meanwhile, an inert aluminum oxide layer is formed, and the flammability is reduced. The antibacterial PP material prepared by the invention not only has good antibacterial and anti-aging effects, but also has excellent flame retardant property.

The invention relates to the technical field of fibers, and discloses an ultrahigh-moisture-absorption anti-static polyester fiber and a preparation method thereof. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on 1, 2-benzisothiazolin-3-one and methacryloyl chloride to obtain modified benzisothiazolinone; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on phosphonitrilic chloride trimer and allylamine, and then carrying out nucleophilic substitution reaction on the phosphonitrilic chloride trimer and melamine again to obtain modified cyclophosphazene; the preparation method comprises the following steps: mixing gamma-methacryloxypropyltrimethoxysilane with aluminum zinc oxide for reaction, and mixing the obtained modified aluminum zinc oxide with modified benzisothiazolinone and modified cyclophosphazene for copolymerization in the presence of an initiator to obtain a flame-retardant antibacterial additive; mixing the flame-retardant antibacterial additive, calcium carbonate and polyethylene glycol terephthalate, performing melt spinning, and performing acid treatment to obtain modified polyester fibers; dipping the modified polyester fiber in a finishing liquid containing modified chitosan to obtain the ultrahigh-moisture-absorption anti-static polyester fiber.

The present application relates to the technical field of quality inspection, and provides a quality inspection system and method for melamine tableware. An image acquisition module acquires image data of melamine tableware in a production process through an image acquisition strategy; a defect recognition module automatically recognizes and classifies defects in the image data, generates recognition results, and improves the accuracy of detection; a parameter monitoring module monitors and records whether there are abnormalities in production parameters of defective melamine tableware in the production process, and determines the correlation between abnormal production parameters and defect types, which helps to timely discover problems in the production process and take corresponding measures to adjust them; a dynamic adjustment module dynamically adjusts production parameters according to the correlation between abnormal production parameters and defect types, and continuously monitors the production process to optimize the adjustment of production parameters. The automated adjustment method can reduce human intervention and improve the stability and controllability of the production process.

The invention discloses a preparation method of an ultra-thin high-density fiberboard with ultra-low formaldehyde emission, which is characterized by comprising the following steps: peeling wood by using a peeling machine, chipping to obtain wood chips, washing the wood chips with water, cooking in a cooking cylinder, feeding into a defibrator, and adding molten paraffin for treatment to obtain fibers; meanwhile, formaldehyde is taken to be mixed with sodium bentonite, triethylene diamine and polyvinyl alcohol, then urea is added in five times, melamine is added in two times, a reaction is conducted, and melamine modified urea-formaldehyde resin is prepared; taking fibers, applying an adhesive formed by mixing melamine modified urea-formaldehyde resin, nano titanium dioxide and an ammonium chloride curing agent, drying and dehydrating the fibers uniformly mixed with the adhesive, sorting to remove micelles, fiber agglomerates and fiber bundles, and paving and forming to obtain a plate blank; and the plate blank is taken to be subjected to the hot pressing procedure to obtain a plate, and after the plate is cooled, the ultra-thin high-density fiberboard with the advantages of being high in strength, low in formaldehyde emission and the like is obtained after sanding.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a high-strength flame-retardant composite material for pipelines and a preparation method thereof. The high-strength flame-retardant composite material for the pipeline is prepared from the following components in parts by weight: 70 to 80 parts of PA12T, 10 to 15 parts of a toughening agent, 20 to 30 parts of fiber reinforced filler, 8 to 16 parts of melamine polyphosphate, 1 to 6 parts of attapulgite, 2 to 4 parts of graphene, 0 to 3 parts of a coupling agent, 0 to 3 parts of a lubricating agent and 0 to 3 parts of an antioxidant. MPP is an N and P double-element synergistic flame retardant, and the flame retardant effect is better. Through the adsorption effect of the attapulgite, the dispersing performance of the MPP in the PA12T can be improved, and the precipitation phenomenon of the MPP can be prevented. The graphene is used as a common flame-retardant carbon-forming agent, and the lamellar structure of the graphene can play a role in resisting molten drops; and moreover, the graphene and the attapulgite with a rodlike structure interact with each other, so that the dispersion performance of the graphene, the attapulgite and the melamine polyphosphate in the nylon resin is promoted.

The invention relates to a flame-retardant toughening agent for a polypropylene material and a preparation method of the flame-retardant toughening agent, and belongs to the technical field of macromolecular flame-retardant toughening, and the preparation method comprises the following steps: firstly combining an aromatic compound with melamine, and then combining with a flame-retardant material to obtain a flame-retardant compound; the preparation method comprises the following steps: combining itaconic anhydride, a modified toughening agent, octavinyl silsesquioxane and polypropylene through graft copolymerization to obtain grafted polypropylene; combining the flame-retardant compound with grafted polypropylene to obtain a modified flame-retardant toughening agent; and mixing the modified flame-retardant toughening agent with an antioxidant and a lubricant, and carrying out melt blending extrusion to obtain the flame-retardant toughening agent for the polypropylene material. According to the technical scheme, the aromatic compound, the melamine and the flame-retardant material are combined, so that the flame-retardant property of the polypropylene material is effectively improved; the itaconic anhydride, the modified toughening agent and the octavinyl silsesquioxane are combined with the polypropylene, so that the impact toughness and the mechanical property of the polypropylene material are enhanced, and the comprehensive performance of the flame-retardant toughening agent is generally improved.

The invention relates to the technical field of thickening agents, and discloses a preparation method of a high-temperature-resistant thickening agent for fracturing. According to the preparation method disclosed by the invention, acrylamide, sulfobetaine modified acrylamide and pyrrolidone modified naphthyl melamine are polymerized, so that the thickening agent for high-temperature-resistant fracturing is obtained. A triazine ring structure and naphthyl have high stability, the rigidity of a polyacrylamide molecular chain and the hydrophobic association effect between molecules are enhanced, the high temperature resistance and the salt resistance are improved, and due to the conjugation effect formed by two benzene rings in naphthyl, the thermal stability is further enhanced; by introducing vinyl pyrrolidone, hydrolysis of amido in polyacrylamide can be inhibited, and the temperature resistance and salt resistance of the thickening agent are improved; under a high-salt condition, due to weakening and shielding of mutual attraction of salt ions to anionic and cationic groups in the sulfobetaine, polyacrylamide molecules are more stretched, macroscopically, the viscosity is increased or reduced slightly, and the temperature resistance and salt resistance are improved.

The invention provides a photosensitive resin composition containing an anthracene methyl modified melamine photosensitizer, a photosensitive dry film and application of the photosensitive dry film, the photosensitizer adopts a melamine skeleton to connect three anthracene 9-methyl structures, and through a rigid structure of the melamine skeleton and a methylene bridging (-CH2-An) design of an anthracene group, the photosensitive resin composition has the remarkable advantages that the methylene bridging structure can be used for preparing a photosensitizer, and the photosensitizer can be used as a photosensitizer for photosensitization of the anthracene methyl modified melamine photosensitizer. The breakage of carbon-oxygen bonds on alkoxy caused by p-pi conjugation is avoided, so that the migration of small molecular fragments after initiation is reduced, permeable crystallization to a polyethylene protective film is effectively inhibited, and the risk of short circuit of a line is remarkably reduced; the light quantum yield can be greatly improved by introducing a plurality of light sensing units; the melamine skeleton is used, so that the adhesive force of the initiation system on the metal foil surface can be effectively improved; in addition, the photosensitizer also shows excellent solubility and formula compatibility, and can be widely applied to the photocuring fields of dry films, paints, coatings, printing inks, molding materials and the like.

The invention discloses a halogen-free flame-retardant reinforced PBT (polybutylene terephthalate) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The halogen-free flame-retardant reinforced PBT composition comprises polybutylene terephthalate, a halogen-free flame retardant, a melamine flame-retardant synergist, glass fibers, a phenol amide metal deactivator, a free radical trapping agent and a hydroperoxide trapping agent. According to the halogen-free flame-retardant reinforced PBT composition disclosed by the invention, under the combined action of all the components, the effects of improving the flame retardance, the ignition temperature of a glowing filament and the heat-resistant stability can be achieved, and the halogen-free flame-retardant reinforced PBT composition has relatively high mechanical properties. The flame retardant property of the halogen-free flame-retardant reinforced PBT composition reaches V-0 or above, the tensile strength is 95 Mpa or above, the glowing filament ignition temperature is 800 DEG C or above, and the thermal weight loss T1% temperature is 335 DEG C or above.

The invention discloses a carbon fiber surface treatment process, which belongs to the technical field of organic synthesis, and comprises the following steps: S1, taking melamine, adding into tetrahydrofuran, adding carboxylated carbon fiber and a condensing agent, heating to 50-60 DEG C, stirring for 3-4 hours, washing, and drying to obtain melamine modified carbon fiber; s2, adding nano silicon dioxide into DMF (Dimethyl Formamide), performing ultrasonic treatment, adding a silane coupling agent KH550 and succinic anhydride, stirring for 3-5 hours, washing and drying to obtain modified silicon dioxide; and S3, adding the modified silicon dioxide into DMF, adding the melamine modified carbon fiber and a condensing agent, heating to 90-100 DEG C, stirring for 4-5 hours, washing, and drying to obtain the surface-treated carbon fiber. The silane coupling agent KH550 and butanedioic anhydride are used for carboxylation modification of nano silicon dioxide, melamine is used as a coupling agent, nano silicon dioxide is grafted on carbon fibers, surface defects on the surfaces of the carbon fibers can be filled, and therefore the mechanical performance of the carbon fibers is improved.

The invention relates to the technical field of surface coating materials, in particular to a multifunctional surface coating which comprises the following raw materials: organic silicon modified acrylic resin, an intumescent flame retardant, hollow glass beads, nano titanium dioxide, an auxiliary agent, graphene, silver nanoparticles and flaky zinc powder. The intumescent flame retardant is formed by compounding melamine polyphosphate and pentaerythritol, and the auxiliary agent comprises a dispersing agent, a flatting agent and a plasticizer. By integrating multiple functions of fire prevention, water prevention, heat insulation, self-cleaning and the like into a whole, the complex requirements of different fields of buildings, industry, traffic and the like on material performance can be comprehensively met. In the application of building exterior walls, the fireproof safety, the waterproof sealing performance and the heat insulation performance of buildings can be effectively improved, and energy consumption is reduced; in the aspect of industrial equipment protection, equipment can be protected from being damaged by environmental factors such as high temperature, moisture and corrosion, and the service life of the equipment is prolonged.

The invention is suitable for the technical field of solid hydrogen storage, and provides a preparation method and application of a PCN-doped MOF derived nano-porous hydrogen storage composite material. The preparation method comprises the following steps: firstly, synthesizing a cobalt-nickel bimetallic MOF material, and introducing melamine polyphosphate and pentaerythritol ester in the synthesis process; introducing metal vanadium ions to obtain an MOF derivative, and calcining the MOF derivative to obtain the PCN-doped MOF derivative nano-porous hydrogen storage material. And compounding with magnesium hydride to obtain the V-Ni-Co / PCN + MgH2 hydrogen storage composite material. The hydrogen storage capacity of the prepared material reaches 7.0 wt% or above, rapid hydrogen absorption can be started at 40 DEG C, the dehydrogenation starting temperature is reduced to about 150 DEG C, rapid hydrogen absorption / hydrogen desorption is completed within 30 min and 45 min respectively, and excellent hydrogen storage thermal / dynamic performance is shown; after 100 times of hydrogen absorption and desorption cycles, the hydrogen storage capacity retention rate of the material is as high as 97%, and the material shows excellent cycle stability.

The invention relates to the technical field of synthetic leather, in particular to a preparation method of flame-retardant superfine fiber synthetic leather based on a water decrement technology. The method comprises the following steps: dipping pretreatment of PET / PVA sea-island fiber non-woven fabric in a polyvinyl alcohol aqueous solution, synthesis of a modified polyurethane emulsion with fluorine-containing chain modified melamine coated ammonium polyphosphate as a flame-retardant component, multiple padding and water decrement treatment of a composite base material, and sizing finishing by adding a softening agent and an antistatic agent. Through application of fluorine chain modified melamine, dissolution of flame-retardant components in the water decrement process is effectively prevented, meanwhile, the quality of a carbonized layer is improved, and the flame-retardant efficiency is improved. The obtained superfine fiber synthetic leather has excellent flame retardance, good washing resistance and mechanical properties, comfort and high moisture permeability, and is suitable for clothing and special fields with high safety and durability requirements.

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

The invention relates to a covalent organic framework / melamine-based sponge composite material as well as a preparation method and application thereof. The covalent organic framework / melamine-based sponge composite material comprises melamine sponge and a covalent organic framework material, the covalent organic framework material is prepared by reacting an amino monomer with an aldehyde group monomer; the aldehyde group monomer is an aldehyde group monomer containing hydroxyl. The composite material based on the covalent organic framework / melamine sponge combines the excellent hydrophobicity of the covalent organic framework and the high porosity of the melamine sponge, so that the composite material has extremely high adsorption capacity on oil, repels moisture, has an excellent oil-water separation effect and can realize efficient oil-water separation.

The invention provides a halogen-free flame-retardant nylon material as well as a preparation method and application thereof. The halogen-free flame-retardant nylon material comprises the following components in parts by weight: 6-61 parts of polyamide resin A, 8-15 parts of a red phosphorus flame retardant, 1-5 parts of a melamine derivative and 20-50 parts of glass fibers, the polyamide resin A is semi-aromatic polyamide resin, and the melamine derivative comprises a combination of a melamine salt and a melamine condensate. The halogen-free flame-retardant nylon material provided by the invention is excellent in mechanical property and good in flame retardant property, and the ignition temperature of a glowing filament is greater than or equal to 775 DEG C.

The invention discloses a flame retardant with a double-layer microcapsule structure, a flame-retardant polyurethane material as well as a preparation method and application of the flame-retardant polyurethane material, and belongs to the technical field of flame retardants. The material is a multifunctional flame retardant with a double-layer core-shell structure, a shell layer is calixarene boric acid resin, a middle shell layer is melamine phthalic anhydride resin, and a core layer is hydroxyapatite modified aluminum hypophosphite. Due to the high cross-linking degree between polymers, the flame retardance of polyurethane is improved, meanwhile, the mechanical property of the polyurethane is improved, and the flame retardance and seawater corrosion resistance of the material are synergistically enhanced through hydroxyapatite dispersed in the core layer. The double-shell layer has excellent hydrophobicity, prevents internal aluminum hypophosphite from being affected with damp and has anti-fouling and self-cleaning effects, and the prepared flame-retardant polyurethane composite material has excellent tensile and flexible characteristics due to a double network of hydrogen bonds and covalent bonds.

The invention discloses a process and equipment for producing special melamine by a gas phase quenching method. The production process comprises the following steps: hot process gas from an outlet of a melamine reactor is in contact with cold process gas in a crystallizer, a generated solid A is discharged from the bottom of the crystallizer, and mixed gas enters a trap for gas-solid separation to obtain a solid B; the solid A is conveyed into a high-pressure collecting device A through high-pressure conveying gas A, it is ensured that the temperature of the high-pressure conveying gas A is higher than 120 DEG C in the conveying process, after gas-solid separation is conducted in the high-pressure collecting device A, the solid A is conveyed into a packaging device A through low-pressure conveying gas A, and it is ensured that the temperature of the solid A at the conveying tail end does not exceed 85 DEG C.

The invention provides a self-repairing hydrated salt phase change microcapsule as well as a preparation method and application thereof, and belongs to the field of phase change materials. The preparation method comprises the following steps: preparing a hydrated salt phase change material and sorbitol into eutectic melt by adopting a melting method; strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica are added into the eutectic melt, and blending is performed to obtain a core material; The preparation method comprises the following steps: adding strontium carbonate, sorbitol grafted nano titanium dioxide, SiO2-coated silicone rubber microspheres, hollow Al2O3 microspheres, tannic acid microcapsules, alpha-zirconium phosphate, melamine polyphosphate, diethyl aluminum hypophosphite, carboxylated multi-walled carbon nanotubes, polydopamine modified boron nitride nanosheets and hydrophilic fumed silica into the eutectic melt; bio-based polyurethane-polyurea is used as a shell material, the core material is coated in the shell to prepare the microcapsule, and the temperature of the coating operation is not higher than the phase change temperature of the hydrated salt phase change material; the surface is coated with a super-hydrophobic coating. According to the invention, a solid filler system is constructed, and a low-temperature preparation process is combined, so that the phase-change microcapsule with high performance, high reliability and high safety is developed.

The invention provides a preparation method of a triazine / heptazine homojunction structure carbon-doped carbon nitride photocatalyst, which comprises the following specific steps: (1) placing mixed powder of melamine and 2, 4, 6-triaminopyrimidine in air, heating to 300-500 DEG C, and calcining for 2-6 hours to form a mixture of carbon-doped melamine and oligomer thereof; (2) placing the mixture obtained in the step (1) in water at 60-70 DEG C, performing ultrasonic dispersion, then slowly cooling to room temperature, oscillating for 12-36 hours, removing moisture through rotary evaporation, and further drying to obtain a solid supramolecular precursor; and (3) fully mixing the solid supramolecular precursor obtained in the step (2) with molten salt, calcining at 500-600 DEG C for 2-6 hours, cooling, fully washing with deionized water, removing mixed salt, separating solid residues, and drying to obtain the triazine / heptazine homojunction structure carbon-doped carbon nitride photocatalyst THCNx-t. The prepared carbon-doped carbon nitride photocatalyst is uniform in homojunction distribution, and has the characteristics of excellent photochemical properties, high photon-generated carrier separation efficiency and excellent photocatalytic benzyl alcohol selective oxidation performance.

The invention relates to the technical field of flame-retardant materials, in particular to a halogen-free flame-retardant glass fiber modified polypropylene material and a preparation method thereof. The material comprises the following components in parts by mass: 60-80 parts of polypropylene, 15-30 parts of long glass fiber, 8-15 parts of a halogen-free intumescent flame retardant, 2-5 parts of a synergist, 3-8 parts of a compatilizer, 2-3 parts of an interface modifier, 2-4 parts of a dynamic cross-linking agent and 1-3 parts of a functional additive. According to the halogen-free flame-retardant glass fiber modified polypropylene material and the preparation method thereof, an intumescent halogen-free flame retardant melamine polyphosphate is compounded with organic montmorillonite, nano zinc borate and MXene, so that the flame-retardant efficiency is improved through a synergistic effect, and the release of smoke and toxic gas in a combustion process is inhibited; the halogen-free flame-retardant glass fiber modified polypropylene material has a good flame-retardant effect by introducing the halogen-free flame-retardant glass fiber, and maleic anhydride grafted polypropylene is introduced as a compatilizer to modify the surface of the long glass fiber and enhance the interface bonding force between the long glass fiber and a matrix.

The invention belongs to the field of water ecological restoration, and particularly relates to a riverway water ecological restoration method based on an ecological floating blanket, ecological floating blanket-fish-microorganism is utilized to construct an ecological restoration system to improve a riverway water body, and the ecological floating blanket comprises plants, a carrier, a nylon net, a planting matrix and an inorganic filler; the selected plants are subjected to pollutant degrading bacterium inoculation and tolerance experiment domestication; inorganic filler is hung on the lower part of the ecological floating blanket through a nylon net; the nylon net is subjected to membrane pre-hanging treatment, so that a layer of yellowish-brown biological membrane is formed on the surface of the nylon net; the planting substrate is a combination of multiple of chitosan-potassium alginate coating melamine polyurethane composite foam, biochar, scrap iron and alum sludge ceramsite; the plant provided by the invention is high in tolerance and can efficiently adsorb and degrade pollutants; the planting matrix provided by the invention promotes each other and efficiently adsorbs pollutants; the constructed ecological floating blanket-fish-microorganism ecological planting and breeding technology can promote a receiving river channel to form a food chain system with a healthy water body.

Binder compositions are described that include at least one formaldehyde-containing compound, a cyclic urea-dialdehyde compound, and a polyamine compound. The polyamine compound may be selected from melamine and dicyandiamide. The weight ratio of the at least one formaldehyde-containing compound to the combined weight of the cyclic urea-dialdehyde compound and the polyamine compound may be greater than or about 1:1. As described are binder-containing fiberglass products that include glass fibers and a binder. The binder may include a formaldehyde polymer characterized by crosslinking with a cyclic urea-dialdehyde and a polyamine. The binder-containing fiberglass products have reduced formaldehyde emissions.

The invention belongs to the field of flame-retardant finishing of textiles, and discloses a phytic acid-based flame retardant and a preparation method of a flame-retardant cotton fabric. Natural phytic acid, polyethylene glycol, melamine and metal salt are used as main raw materials, the environment-friendly characteristic of a biomass material is combined, an efficient and environment-friendly flame retardant is prepared, the prepared flame retardant is arranged on a cotton fabric through a traditional impregnation method, and the flame retardance and smoke suppression performance of the arranged cotton fabric are greatly improved. The method not only has a good flame retardant effect, but also avoids potential hazards of a traditional flame retardant to the environment and human health, and has a wide application prospect. The flame-retardant cotton fabric can be widely applied to the fields of household textiles, protective clothing, fire-fighting equipment and the like, and has remarkable economic benefits and social benefits. The invention not only provides an efficient and environment-friendly flame retardant preparation method, but also opens up a new way for application of biomass materials in the field of flame retardance, and has important scientific significance and practical value.

The invention provides nitrogen / sulfur co-doped charcoal loaded nano zero-valent iron as well as a preparation method and application thereof, and relates to the technical field of sewage treatment. The nitrogen / sulfur co-doped biochar loaded nano zero-valent iron is a composite material prepared by taking nitrogen / sulfur co-doped biochar as a carrier material and loading nano zero-valent iron; the nitrogen / sulfur co-doped biochar is prepared from the following raw materials: melamine, diphenyl disulfide and walnut shells. The nitrogen / sulfur co-doped biochar loaded nano zero-valent iron prepared by the invention combines the porous characteristic of biochar and the high reaction activity of nano zero-valent iron, not only has excellent oxidation resistance and corrosion resistance, but also retains good hydrophilicity and magnetism, can efficiently remove antibiotic pollutants in the environment, and has a good application prospect. And actual operation and recycling are facilitated.

The invention belongs to the field of macromolecules, and discloses a water-lubricated composite material, a preparation method and a bearing.The water-lubricated composite material is characterized in that composite paraffin microcapsules with micro-protrusion structures are prepared from raw materials such as nano-cellulose whiskers, sodium chloride, paraffin and melamine, and the composite paraffin microcapsules and carbon fibers are jointly added into ultra-high molecular weight polyethylene, so that the water-lubricated composite material is prepared. The water-lubricated composite material is prepared from the composite paraffin microcapsules, the composite paraffin microcapsules with the micro-bulge structures can be uniformly distributed in the water-lubricated composite material and slowly release a lubricant after being abraded, and in addition, the composite paraffin microcapsules are matched with the carbon fibers added into the composite paraffin microcapsules, so that the water-lubricated composite material can be prepared by the composite paraffin microcapsules under the support of the carbon fibers. The excellent performance is brought to the water-lubricated composite material, so that the water-lubricated composite material provided by the invention has low friction coefficient and wear resistance.

The invention relates to the technical field of high polymer materials, in particular to a resin composite material with flame-retardant and insulating properties and a preparation method thereof. The problems that in the prior art, a resin composite material is poor in flame retardance and insufficient in insulating property are solved. The preparation method comprises the following steps: modifying epoxy resin with maleic anhydride and carboxyl modified nitrile rubber to obtain modified epoxy resin; a modified flame-retardant system is obtained by processing the carbon nanotube loaded melamine polyphosphate, the triphenyl phosphate and the magnesium hydroxide; the preparation method comprises the following steps: mixing modified epoxy resin and a modified flame-retardant system, adding modified nano silicon dioxide through a supercritical fluid technology and ultrasonic dispersion, and performing staged curing through a curing agent to obtain a resin composite material; the flame retardant property of the composite material is improved through the synergistic effect of the flame retardant and loading of the carbon nanotubes; and through the synergistic effect of the modified nano silicon dioxide and the carbon nanotubes, the insulating property of the composite material is improved.

The invention is suitable for the technical field of flame retardance of high polymer materials, and provides a core-shell structure graphite phase carbon nitride derivative and a preparation method thereof.The derivative is prepared by the steps that a precursor containing phosphorus and boron elements is mixed with melamine, and phosphorus / boron co-doped graphite phase carbon nitride is prepared through a high-temperature thermal polymerization reaction; and then assembling the phytic acid copper on the surface of the graphite-phase carbon nitride in an in-situ growth manner by adopting an aqueous solution self-assembly method to construct a derivative with a core-shell structure. The invention provides the graphite phase carbon nitride derivative with the core-shell structure, which is green, environment-friendly, efficient and flame-retardant and simple and convenient in process, and the preparation method of the graphite phase carbon nitride derivative, and the graphite phase carbon nitride derivative has wide application prospect and industrialization value.

The invention belongs to the technical field of insulating flame-retardant adhesive tapes, and particularly relates to an insulating flame-retardant adhesive tape and a preparation method thereof. According to the invention, phytic acid reacts with 3-amino-5-methylpyrazole, triaminopyrimidine and polyether amine-2000 to prepare a flame-retardant auxiliary agent, and the flame-retardant auxiliary agent is compounded with magnesium hydroxide, zinc borate and melamine to prepare a modified flame retardant which can generate an expansive carbon layer during combustion to block heat and isolate oxygen so as to achieve a flame-retardant effect; an aluminum oxide layer generated on the artificial diamond micro-powder is used as an insulating heat-conducting aid, so that the insulativity, wear resistance and corrosion resistance of the insulating flame-retardant adhesive tape are improved, the adhesive tape can be assisted in uniform heat conduction, and combustion caused by over-high local temperature is prevented; epoxy resin is used for wrapping the uniformly dispersed insulating heat-conducting auxiliary agent, and anisyl and boron nitride ceramic powder are cured to prepare an insulating material, so that the dielectric breakdown performance of the adhesive tape is enhanced. The insulating flame-retardant adhesive tape prepared by the invention is excellent in insulativity and flame retardance and free of halogen flame retardants, and the production process is environment-friendly.