1623 results about "Thermal decomposition" patented technology

The invention relates to the technical field of hydrogen preparation, and provides a hydrogen storage device based on a solid hydrogen storage material and a hydrogen production method thereof.The device comprises a fuel tank internally provided with a reaction cavity used for containing an aluminum hydride material and mixed powder; the heater is arranged on the outer side of the fuel tank; the first end of the water recycling assembly is communicated with the reaction cavity, and the second end of the water recycling assembly is communicated with the fuel cell system so as to recycle water generated by the fuel cell system to the reaction cavity; the first end of the hydrogen discharging assembly is communicated with the reaction cavity, and the second end is communicated with a fuel cell system. According to the hydrogen storage device provided by the invention, through the application of the high-specific-energy solid hydrogen storage material aluminum hydride which can be stored at normal pressure and release hydrogen at a relatively low temperature, the thermal decomposition process of the metal hydride in the fuel tank and the coupling reaction process of the metal hydride and water are optimized, and the hydrogen is produced by utilizing the hydrolysis reaction of the aluminum hydride thermal decomposition reactant simple substance aluminum and the water; meanwhile, thermal decomposition of aluminum hydride is promoted through heat released by hydrolysis reaction, hydrogen release is coupled, and effective utilization of heat is achieved.

The invention discloses an environment-friendly high-strength water-stop belt and a preparation method thereof, and relates to the technical field of high-molecular compound composition water-stop belts. The environment-friendly high-strength water-stop belt is prepared from the following components in parts by mass: 100 parts of ethylene propylene diene monomer, 40 to 70 parts of reinforcing filler, 10 to 25 parts of environment-friendly plasticizer, 1 to 5 parts of interface modifier, 1.5 to 3.5 parts of vulcanizing agent, 3 to 8 parts of active agent, 1 to 3 parts of anti-aging agent and 5 to 15 parts of flame retardant. White carbon black and calcium carbonate are adopted as reinforcing filler to replace traditional carbon black, and energy consumption and pollution emission in the production process are remarkably reduced. By optimizing the formula and the preparation process, the tensile strength, the elongation at break, the tearing strength and other mechanical properties of the waterstop are remarkably improved. Aluminum hydroxide is added as a flame retardant, absorbs heat during thermal decomposition and forms a barrier layer, so that oxygen is effectively diluted, and fire spreading is prevented.

The invention discloses a pyrolysis recovery system for cooperative treatment of waste wind power blades by a power station boiler, and belongs to the technical field of solid waste recovery. The system comprises a power station boiler, a pyrolyzing furnace, a mixed flue, a nitrogen air flue and a controller. Oxygen is accurately controlled by mixing flue gas at different temperature levels and mixing nitrogen, and a safe and stable heat source is provided for the pyrolyzing furnace; pyrolysis gas returns to a boiler hearth through an outlet flue to be burnt out, and recyclable fibers and residues are conveyed out through a chain grate stoker; and the controller is linked with each sensor to execute oxygen control, temperature regulation, fiber quality protection and safety interlocking operation. The problems that in pyrolysis of the waste wind power blade, heat source adaptability is poor, oxygen concentration is out of control, fiber quality is poor, the risk is high, and pyrolysis gas is difficult to dispose are solved, and gradient utilization of energy, intrinsically safe operation, high-quality and high-purity recovery of fibers and collaborative treatment of pollutants are achieved.

The invention discloses a lubricant composition and application thereof in processing of a high-weather-resistance PC hollow plate, and relates to the technical field of lubricant compositions. The lubricant composition comprises the following components in parts by mass: 40-60 parts of base oil, 5-15 parts of a weather-resistant stable additive, 3-8 parts of an anti-wear reagent at extreme pressure, 2-6 parts of a dispersing agent, 1-4 parts of an antioxidant, 0.5-2 parts of a coupling agent and 20-30 parts of a solvent. Through the molecular collaborative design of the polar base oil and the solvent, the thermal decomposition tendency in the processing process is remarkably reduced, and a lubricating system is promoted to be upgraded to a low-volatilization and low-pollution green process direction. A weather-resistant additive molecular skeleton with anti-oxidation and anti-ultraviolet characteristics is innovatively constructed, integration of multiple protection mechanisms in material processing and service stages is realized, and dependence on secondary addition of auxiliaries in a traditional process is reduced.

The invention provides gel with a three-dimensional network structure, a preparation method of the gel and a lithium battery, and belongs to the technical field of lithium batteries. The gel provided by the invention comprises the following raw materials: polyethylene glycol dimethacrylate (PEGDMA) and / or a derivative thereof, a fluorine-containing carbonate compound, a cross-linking agent, a lithium salt, a flame retardant and an organic solvent. The PEGDMA and / or the derivative thereof and the fluorine-containing carbonic ester compound generate a three-dimensional network structure under the action of the cross-linking agent, the fluorine-containing carbonic ester compound can improve the interface stability between the gel and the electrode material, reduce the interface side reaction and improve the thermal stability of the gel, and the performance of the electrode material is improved. Meanwhile, the three-dimensional network structure has relatively high porosity and liquid absorption capacity, so that an ion transmission channel is improved, and the ionic conductivity of the gel is further improved. The room-temperature ionic conductivity of the gel with the three-dimensional network structure is larger than or equal to 3 mS / cm, and the thermal decomposition initial temperature is larger than or equal to 250 DEG C.

The present invention addresses the problem of providing a method for producing olefins that can sufficiently remove polyamides from waste plastics. [Solution] The method for producing olefins according to the present invention includes a thermal decomposition step of thermally decomposing a waste plastic raw material containing polyolefins and polyamides to obtain a hydrocarbon stream, a separation step of separating a thermal decomposition product of the polyamides from the hydrocarbon stream that has undergone the thermal decomposition step, and a catalytic cracking step of catalytically cracking the hydrocarbon stream that has undergone the separation step in the presence of a catalyst containing zeolite to obtain olefins.

The invention relates to a composite solid electrolyte and a preparation method and application thereof. The preparation method of the composite solid electrolyte comprises the following steps: S1, mixing an inorganic filler and a fluorine-containing compound, and reacting at 70-90 DEG C under an acidic condition to obtain an inorganic filler wrapped by a fluorinated layer; then adding a fluorine ion complexing agent and a silane coupling agent for reaction to obtain a modified filler; adding a thermal decomposition type cross-linking agent into the polymer, and carrying out melt blending to obtain a cross-linked polymer; s2, uniformly mixing the modified filler, a cross-linked polymer, a lithium salt and a solvent to obtain a plurality of slurries containing the modified filler with different volume concentrations; and molding the slurry to prepare the composite solid electrolyte. According to the method, the fluorinated layer and the siloxane network are constructed step by step, so that the interface impedance is reduced, and efficient dissociation of the lithium salt is promoted; a three-dimensional network structure is combined, so that the tensile strength is improved; the modified filler is further designed in a gradient manner to improve the lithium ion transference number.

The invention discloses a preparation method of modified self-extinguishing insulating oil with flame-retardant and self-repairing functions. Wherein the insulating liquid is mixed oil of mineral oil and palm oil-based modified natural ester, and the inherent high flash point characteristic of the natural ester improves the fireproof safety of the insulating oil. The modified hexagonal boron nitride (h-BN), the magnesium hydroxide nano material and the microcapsule repairing agent are added into the insulating oil, and the h-BN can capture free electrons in the oil, so that the formation and expansion of electric arcs are inhibited, and the breakdown voltage is improved. Magnesium hydroxide is heated to decompose and absorb heat, the fault temperature is reduced, and therefore the arc self-extinguishing effect is achieved. Under the action of a high electric field and a high temperature, the capsule wall of the microcapsule repairing agent is broken, meanwhile, the repairing material is released, a chemical reaction is carried out, and the insulating property of the insulating oil is repaired. The modified insulating oil prepared by the invention has high insulating strength and high flame retardance, and also has a performance self-repairing function, so that the service life of the insulating oil is prolonged.

The invention provides a method and a system for predicting residual compression strength of a carbon fiber composite material after lightning stroke, and belongs to the technical field of electric digital data processing. According to the method, by considering the pyrolysis degree of the lightning stroke CFRP composite material, the non-linear mechanical property parameters related to the pyrolysis degree actually measured based on the test and the thermal and mechanical damage results predicted based on the electric-thermal-mechanical multi-physics field coupling model are calculated; an actually measured nonlinear mechanical property thermal damage factor and a mechanical damage factor caused by impact damage are introduced into a constitutive relation of the CFRP composite material, and a finite element simulation method capable of quantitatively predicting the residual compression strength after lightning stroke is established by virtue of finite element software ABAQUS; the problems that in the prior art, the influence mechanism of lightning stroke damage on the mechanical property of the CFRP composite material is not clear, and a simulation modeling method capable of being directly used for calculating and predicting the residual compression strength after lightning stroke is lacked are solved.

The invention discloses a glufosinate-ammonium production waste gas treatment device and method, and relates to the technical field of waste gas treatment.The glufosinate-ammonium production waste gas treatment device comprises an adsorption mechanism, an air pipeline and a heating decomposition mechanism, and the adsorption mechanism comprises an adsorption disc and a power structure driving the adsorption disc to rotate; the adsorption disc comprises a plurality of annularly distributed adsorption units; the air pipeline wraps one side of the adsorption disc to form an adsorption area, and the adsorption area is used for adsorbing and filtering pollutants in waste gas in the air pipeline; the heating decomposition mechanism wraps the other side of the adsorption disc to form a desorption area, and the desorption area is used for releasing the adsorbed pollutants from the adsorption unit, decomposing the adsorbed pollutants into harmless substances and recovering the activity of the adsorption unit; the adsorption disc is driven by the power structure to continuously rotate, so that the dynamic switching between the adsorption area and the desorption area is realized, and the continuous operation of waste gas treatment is realized. Dynamic switching between the adsorption area and the desorption area is achieved, pollutants are efficiently captured by adsorption particles in the adsorption unit, shutdown is not needed, and the requirement for continuous operation of glufosinate-ammonium production is met.

The invention relates to the field of multifunctional coatings, in particular to a multifunctional coating based on acrylic resin and a production process of the multifunctional coating. Comprising the following raw materials in parts by weight: 40-60 parts of water-based acrylic resin emulsion, 0.3-0.6 part of a defoaming agent, 3-5 parts of modified nano hydroxyapatite, 0.3-0.5 part of a flatting agent, 2-5 parts of a dispersing agent, 1-3 parts of a curing agent, 3-5 parts of modified nano aluminum oxide and 30-50 parts of deionized water. The grafted chloroprene rubber can improve the interfacial compatibility of the nano-hydroxyapatite and a matrix and endows the coating with wear resistance, and after the nano-alumina is grafted with polybenzimidazole, a benzimidazole ring interacts with the matrix to enhance the interfacial compatibility of the nano-alumina and the matrix, so that the nano-alumina forms a high-temperature-resistant structure in the coating, and the wear resistance of the coating is improved. And the aromatic heterocyclic structure of the polybenzimidazole can endow the coating with higher thermal decomposition temperature, so that the coating has high temperature resistance.

According to the monolithic catalyst packed bed process system and the corresponding method for fluidized carbonate reduction based on the monolithic catalyst, by adopting the monolithic catalyst, full contact of a gas phase, a solid phase and a solid phase is guaranteed, the efficiency of carbonate reduction reaction is improved, and the utilization rate of the catalyst is increased. Meanwhile, the problem of separation of a subsequently generated oxide solid product and a catalyst solid is avoided, and continuous operation of the system is realized. According to the present invention, the heating decomposition reaction of the metal carbonate and the hydrogenation reduction reaction of the in-situ carbon dioxide are coupled, and the monolithic catalyst is adopted to perform catalysis so as to obtain the high-value metal oxide and the synthesis gas or methanol product, and compared with the prior art, the process reaction temperature is substantially reduced so as to easily promote energy saving and emission reduction.

The invention discloses a preparation method and application of a bio-based zinc adenine salt environment-friendly PVC heat stabilizer, and belongs to the field of fine chemical synthesis and plastic additive application. The nitrogen-containing organic metal heat stabilizer adenine zinc complex is prepared by taking adenine and zinc acetate as main raw materials through a one-step method. The method is simple and environment-friendly in preparation process, easily available in raw materials and suitable for industrial production. The prepared heat stabilizer zinc adenine is used as a heat stabilizer, can effectively absorb hydrogen chloride generated by PVC thermal decomposition, and can replace allyl chlorine atoms, so that the heat stability of a PVC product is improved, PVC has more excellent heat stability, and the heat stabilizer is expected to replace a traditional commercially available heat stabilizer.

The invention belongs to the field of soft magnetic functional materials, and particularly relates to a low-loss high-superposition Fe-Si-Al magnetic powder core and a preparation method thereof, and the preparation method comprises the following steps: preparing a coating agent, passivating coated powder, bonding and lubricating, and pressing and annealing. According to the method, based on the hydrolysis characteristic of metasilicic acid and the hydrolysis promotion effect of the alkaline catalyst, nano-porous silicon dioxide is prepared as a coating agent, meanwhile, the etching effect of alkaline matter on silicon dioxide can effectively increase the specific surface area of the nano-porous silicon dioxide, and the bonding strength of the nano-porous silicon dioxide and iron-silicon-aluminum powder is improved; the vacuum calcination treatment not only removes residual reagents, but also promotes sufficient thermal decomposition of metasilicic acid into silicon dioxide for in-situ coating, and stabilizes the lattice structure of the metasilicic acid. The coating layer of the low-loss high-superposition Fe-Si-Al magnetic powder core is firm in combination, thin and uniform in thickness and stable and compact in structure, the hysteresis loss of the Fe-Si-Al magnetic powder core can be effectively reduced, the direct-current bias performance is improved, and rising of eddy-current loss is avoided.

The invention discloses a production process of high-purity lithium oxide, and relates to the technical field of lithium oxide preparation. The production process of the high-purity lithium oxide comprises the following steps: mixing lithium hydroxide and hydrogen peroxide with the mass concentration of 90-99%, and carrying out peroxidation reaction to obtain a mixture containing lithium peroxide and lithium hydroxide; carrying out solid-liquid separation on the mixture containing the lithium peroxide and the lithium hydroxide to obtain a supernatant containing the lithium hydroxide and a solid containing the lithium peroxide; and carrying out drying treatment on the supernatant containing the lithium hydroxide to obtain the recycled lithium hydroxide, and carrying out thermal decomposition on the solid containing lithium peroxide in an inert gas protective atmosphere to obtain the high-purity lithium oxide powder. According to the technical scheme, the high-purity lithium oxide is prepared by adopting a process of peroxidizing lithium hydroxide into lithium peroxide and then carrying out thermal decomposition, the powder can be obtained without grinding, and the method has the advantages of high production efficiency, low energy consumption and high raw material utilization rate.

The invention provides an antibacterial ceramic glaze sintering process optimization and intelligent temperature control method and system. According to the method, the molecular vibration characteristics of the antibacterial agent at different temperatures are dynamically obtained, and a thermal decomposition dynamic fingerprint database is constructed according to the attenuation law of the molecular vibration characteristics; meanwhile, a three-dimensional temperature field of the glaze layer is reconstructed based on a coupling relation between sound wave propagation parameters and glaze thermal expansion. And carrying out transfer learning on the fingerprint database and historical process data, predicting a glaze thermal stability attenuation parameter, and calculating a temperature gradient and molecular chain fracture compensation coefficient. And fusing the temperature field and the attenuation parameter, and dynamically regulating and controlling the sintering temperature curve and preserving heat by combining the compensation coefficient. The adjusted parameters generate closed-loop feedback by verifying the matching degree of the glaze microstructure and the antibacterial indexes, the compensation coefficient is corrected, and it is ensured that the antibacterial performance of the glaze is stabilized within the process allowance. The temperature control precision and the antibacterial performance stability of antibacterial ceramic glaze sintering are improved.

The invention discloses a preparation method of a high-purity ultra-clean hydroxylamine aqueous solution. A four-stage purification process comprises the following steps: 1) low-temperature chelation-ceramic membrane metal removal; 2) molecular sieve membrane rectification decomposition prevention; 3) pulse electrodialysis reversal deep desalination; and 4) gradient filtration terminal refining. According to the preparation method of the high-purity ultra-clean hydroxylamine aqueous solution, a low-temperature molecular sieve membrane rectification technology is adopted, hydroxylamine liquid-phase thermal decomposition is avoided through a vapor phase separation mechanism, and the decomposition rate is reduced to 1t from 15% of a traditional process; the method comprises the following steps of: removing metal through chelation-electrodialysis synergistically, ensuring that Fe and Cu ion residues are less than or equal to 0.05 ppb through a thiosemicarbazide-bipolar membrane system, ensuring the nitrogen environment in the whole process, ensuring that the dissolved oxygen is less than or equal to 5ppb, replacing liquid phase distillation with molecular sieve membrane vapor phase separation, solving hydroxylamine liquid phase thermal decomposition, and breaking through the trace metal removal limit by combining thiosemicarbazide-bipolar membrane synergistically removing impurities. And then through nanoscale terminal filtration, the metal / particle control reaches ppb-level limit which is superior to the SEMI standard, and double spanning of quality and cost is realized.

The invention belongs to the technical field of inorganic powder material modification, and discloses an aluminum hydroxide powder modification treatment method which comprises the following steps: step 1, plasma pretreatment, step 2, in-situ coordination reaction, step 3, nano-composite coating and step 4, post-treatment. The performance of aluminum hydroxide is remarkably improved through a plasma pretreatment-in-situ coordination-nano coating synergistic process, specifically, surface hydroxyl groups are reduced by 45% through plasma treatment, and a contact angle is larger than or equal to 120 degrees, the thermal decomposition temperature is increased by 55 DEG C, and LOI is increased to 31.8% by combining Al-O-P bonding and a SiO-GQDs composite coating layer. According to the process, the energy consumption of the pulse plasma is reduced by 40%, the cost of the spray drying coating process is reduced by 60%, and the GQDs are derived from the graphite waste, so that resource circulation is realized; and the material is non-toxic, has no stripping on a cold-hot cycle interface, meets the green flame-retardant standard, and provides an efficient solution for sustainable development of inorganic fillers.

The invention discloses a method for preparing tantalum carbide powder by carburization based on a double-effect synergistic effect of molten salt activation and catalytic decomposition, which comprises the following steps: mixing molten salt powder A and tantalum powder to obtain mixed powder, heating the mixed powder to 600-1200 DEG C for activating treatment to obtain activated tantalum powder, separately placing molten salt powder B and the activated tantalum powder in a heating furnace, heating the heating furnace to 100-200 DEG C, heating the heating furnace to 100-200 DEG C, and heating the heating furnace to 100-200 DEG C to obtain the tantalum carbide powder. The heating furnace is heated to enable the molten salt powder B to be converted into molten salt, then carbon source gas firstly flows through the molten salt to form active gas, the active gas makes contact with the activated tantalum powder to react, and the tantalum carbide powder is obtained. On one hand, the tantalum powder is subjected to surface activation treatment through the molten salt, and the reaction activity of the tantalum powder is improved; the molten salt medium assists in organic gas decomposition, the thermal decomposition efficiency of the organic gas is improved, the production energy consumption is effectively reduced under the cooperation of the molten salt auxiliary gas decomposition and the molten salt activation tantalum powder process, and the product purity and uniformity are improved.

The invention provides a synthesis method of bio-based poly (ethylene 2, 5-furandicarboxylate) (poly (ethylene 2, 5-furandicarboxylate) for short) and performance application of the bio-based poly (ethylene 2, 5-furandicarboxylate). According to the method, 2, 5-furandicarboxylic acid (FDCA) derived from renewable resources and ethylene glycol (EG) are used as main raw materials, and the high-molecular-weight PEF is prepared through microwave-assisted esterification-polycondensation reaction under the action of a metal catalyst. The prepared PEF has excellent thermal mechanical property and gas barrier property, the glass transition temperature is about 58.6 DEG C, the melting temperature is about 187.4 DEG C, and the thermal decomposition 18% weight loss temperature exceeds 400 DEG C. The PEF material can be biologically degraded under the industrial composting condition, and the degradation speed is higher compared with that of traditional petroleum-based PET polyester. The PEF provided by the invention is suitable for the fields of food packaging films, beverage bottles and fiber materials, has the advantages of biodegradability, heat resistance stability and high barrier property, can partially replace polyethylene glycol terephthalate (PET) and other petrochemical plastics, and meets the requirements of sustainable development.

The present invention provides a fire extinguishing sheet suitable for productivity, mass production, and large-scale production, wherein the fire extinguishing sheet can be used in places, facilities, structures, etc., where a fire may occur, and has an initial fire extinguishing function. The fire extinguishing sheet according to the present invention contains a fire extinguishing agent that when a predetermined temperature is reached, thermally decomposes to generate a fire extinguishing component.

The invention discloses perfluoroether rubber as well as a preparation method and application thereof. The perfluoroether rubber has an A1-B1-A2-B2 block structure, and the block A1, the block B1, the block A2 and the block B2 are respectively and independently obtained by polymerizing tetrafluoroethylene and perfluoroalkyl vinyl ether; the molar percentage content of the perfluoroalkyl vinyl ether in the block B1 or the block B2 is higher than the molar percentage content of the perfluoroalkyl vinyl ether in the block A1 and is also higher than the molar percentage content of the perfluoroalkyl vinyl ether in the block A2; the molar percentage content of the perfluoroalkyl vinyl ether in the block B2 is higher than the molar percentage content of the perfluoroalkyl vinyl ether in the block B1. The perfluoroether rubber provided by the invention has an A1-B1-A2-B2 four-block structure, realizes progressive transition of rigidity-flexibility-rigidity-super-flexibility, reduces compression set, prolongs the service life of a plasma environment, has high thermal decomposition temperature, and can be used for a long time at 300 DEG C or above.

The present invention relates to the technical field of the preparation of electrocatalysts, and in particular relates to a bismuth-copper bimetallic composite catalyst, and a preparation method therefor and the use thereof. The catalyst comprises ultra-small copper nanoclusters and bismuth nanosheets, wherein the bismuth nanosheets are of a polycrystalline structure, and the copper nanoclusters are highly dispersed on the bismuth nanosheets; and the number of copper atoms in each copper nanocluster is less than 10. In the present invention, highly-dispersed ultra-small copper nanoclusters are loaded on bismuth nanosheets by means of the thermal decomposition of a metal complex and a subsequent in-situ electroreduction method, the electronic state of bismuth atoms is adjusted, and therefore the carbon dioxide activating capacity of the bismuth-copper bimetallic compound is improved, thereby achieving high-selectivity and high-activity preparation of a formate by means of the electrocatalytic reduction of carbon dioxide, and providing a new path for the efficient conversion of carbon dioxide. The bismuth-copper bimetallic composite catalyst provided by the present invention achieves both a formate selectivity of more than 90% and an ultrahigh activity under conditions of 1.2 A cm-2.

The invention discloses a system and a method for rapidly screening illegal additives of health care products based on multispectral imaging, relates to the technical field of health care product detection, and aims to solve the problem of low detection accuracy caused by the fact that an embedding structure hinders spectral signal penetration in the prior art. The system comprises an embedding material characteristic analysis module, a targeted crushing parameter calculation module, a microcapsule crushing execution module, a multispectral imaging module and an illegal additive identification module, the embedding material characteristic analysis module is used for acquiring characteristic parameters of an embedding material in the microcapsule embedding type health care product, and the characteristic parameters comprise hardness, thickness, elastic modulus, thermal decomposition temperature, Poisson's ratio and thermal expansion coefficient of the embedding material; and the targeted fragmentation parameter calculation module is used for receiving the characteristic parameters and calculating the characteristic parameters through a multi-dimensional algorithm to obtain targeted fragmentation parameters. The method has the advantage that illegal additives in health care products can be quickly and accurately screened.

The invention discloses a method for preparing a g-C3N4 loaded Fe and Mn bimetallic catalyst with high efficiency and low cost, and belongs to the technical field of catalysts. Manganese ferrite is adopted as a bimetal source, a melamine one-step calcination method is combined, synthesis of g-C3N4 and loading of Fe and Mn are synchronously achieved, manganese ferrite is decomposed into FeOx and MnOx nanoparticles in the calcination process, the FeOx and MnOx nanoparticles and nitrogen sites of g-C3N4 form strong coordinate bonds, metal atomic-scale dispersion can be achieved, and metal ion migration is inhibited; through the bimetallic synergistic effect of Fe and Mn, the oxidation-reduction capacity of the catalyst can be remarkably improved; through the unique thermal decomposition characteristic, the bimetallic synergistic effect and the strong chemical bonding of the manganese ferrite and g-C3N4, the efficient exposure of active sites, the remarkable improvement of the oxidation reduction capacity and the effective inhibition of metal dissolution are realized, and the preparation method also has the advantages of high efficiency, low cost and small secondary pollution risk.

The invention relates to the technical field of polypropylene composite materials, and discloses a high-strength antibacterial polypropylene composite material and a preparation method thereof, the polypropylene composite material comprises 60-90 parts by weight of polypropylene, 10-40 parts by weight of nylon 6, 2-8 parts by weight of maleic anhydride grafted polypropylene, 0.5-2 parts by weight of an arginine antibacterial agent and the like. The arginine antibacterial agent has good compatibility with polypropylene and nylon 6, is uniformly dispersed in the composite material, has little influence on the mechanical properties of the material, and can maintain very high tensile strength and impact strength. A side chain of the arginine antibacterial agent contains a large number of guanidyl antibacterial groups, and the arginine antibacterial agent is good in heat resistance, not prone to thermal decomposition, uniformly dispersed in a composite material matrix and capable of effectively killing staphylococcus aureus and escherichia coli, so that the composite material has very high antibacterial performance.

The invention relates to the technical field of polyurethane compositions, in particular to a chlorotrifluoropropene-based high-temperature-resistant polyurethane composition and a preparation process thereof, and the chlorotrifluoropropene-based high-temperature-resistant polyurethane composition comprises the following raw materials: hydroxylated chlorotrifluoropropene, modified hexamethylene diisocyanate tripolymer, phthalic anhydride polyester polyol, nano silicon carbide whiskers and polyimide microspheres. A fluorine element is introduced into hydroxylated chlorotrifluoropropene, so that the thermal decomposition temperature of the material is remarkably increased, and thermal movement and oxidative degradation of a molecular chain at high temperature are inhibited; meanwhile, a rigid benzene ring structure of bisphenol A dihydroxyethyl ether improves the regularity of a molecular chain and reduces high-temperature softening deformation. The modified hexamethylene diisocyanate tripolymer forms a stable siloxane cross-linked network, so that the thermal stability of the material is further enhanced; in addition, an isocyanate group reacts with hydroxyl to generate a high-density carbamate crosslinking point, so that the regularity of a hard segment is enhanced, and the thermal stability of the material is improved.

The invention discloses a preparation method of a smokeless flame-retardant fire blanket, and relates to the field of fire-fighting facilities, and the smokeless flame-retardant fire blanket is formed by compounding a surface layer, a middle layer and an inner layer; the preparation method of the smokeless flame-retardant fire blanket comprises the following steps: S1, preparing the surface layer: mixing the high-temperature-resistant silicone rubber with the solvent, the curing agent, the filler and the auxiliary agent, and uniformly stirring to form a silicone rubber coating solution; the high-temperature-resistant silicone rubber coating and the glass fibers are used as base materials, the inner layer is the macromolecular fire extinguishing material coating and has excellent fire extinguishing, heat insulating and high-temperature-resistant performance, the product is coated with multiple organic high-temperature-resistant silicone rubber, so that the organic high-temperature-resistant silicone rubber is tightly attached to the surfaces of the glass fibers, and a high-strength composite protective layer is formed; and a special polymer fire extinguishing material coating is further applied, and when exposed to open fire, the functional coating can quickly generate thermal decomposition reaction, release non-combustible gas and effectively reduce local oxygen concentration, so that the flame-retardant and fire-extinguishing effects are realized.

The invention relates to the technical field of polyvinyl chloride, and discloses an anti-aging heat-resistant PVC plastic, a hyperbranched polyamide-lanthanum complex polymer contains a heat-resistant triazine ring and a rigid triphenylbenzene structure, the initial decomposition temperature of polyvinyl chloride can be increased, the triazine ring and the high-carbon-content triphenylbenzene structure form a triazine carbon-forming agent, and the aging resistance of polyvinyl chloride is improved. The mass residual rate of the polyvinyl chloride is obviously improved, and the heat resistance of the polyvinyl chloride is enhanced. The hyperbranched polyamide-lanthanum complex polymer has a lanthanum complex structure with high lanthanum content, and can react with hydrogen chloride generated by thermal decomposition of polyvinyl chloride, so that the polyvinyl chloride is prevented from being degraded by the hydrogen chloride, and the aging resistance of the polyvinyl chloride is improved.

The invention relates to the technical field of separation and purification, in particular to a purification method of eugenol, which comprises the following steps: (a) dissolving crude eugenol in an ethanol aqueous solution to prepare a solution with eugenol mass concentration of 20-30%; (b) adding a composite protective agent into the solution, uniformly stirring and standing to obtain a mixed solution, the composite protective agent comprising modified chitosan, sodium ascorbate and nano-silica; (c) carrying out reduced pressure evaporation on the mixed solution, and recovering the solvent to obtain a concentrated solution; (d) adding the concentrated solution into a glycine aqueous solution with the mass concentration of 1-2%, uniformly stirring and standing; and (e) carrying out segmented temperature control rectification on the concentrated solution treated in the step (d), and collecting a target fraction to obtain the high-purity eugenol. By introducing a novel protective agent system and a staged temperature control rectification technology, the occurrence rate of thermal decomposition and oxidation reaction is remarkably reduced, and the product purity and the production efficiency are improved.