71 results about "Urea-formaldehyde" patented technology

The invention belongs to the technical field of concrete, and particularly relates to green high-strength concrete and a preparation method thereof.The preparation method comprises the steps that an organic phase-change material with the phase-change temperature being 0-10 DEG C is taken and packaged with a polymethyl methacrylate shell, and organic microcapsules are prepared; taking an inorganic phase-change material with the phase-change temperature of 50-95 DEG C, and packaging the inorganic phase-change material with a urea-formaldehyde resin shell to prepare an inorganic microcapsule; the organic microcapsules and the inorganic microcapsules are mutually combined to form microcapsule pairs; coating the micro-capsule exterior with a silicon dioxide shell to obtain phase change particles; and mixing the phase change particles into the concrete to obtain the high-strength concrete. The green high-strength concrete disclosed by the invention contains two phase change materials with different phase change temperatures, so that heat can be stored during internal temperature rise, and the temperature rise rate in the concrete is effectively reduced; meanwhile, the low temperature of the outer wall needs to be relieved, the freezing damage influence is relieved, the internal and external temperature difference is reduced, caused thermal stress is reduced, and therefore the cracking risk is reduced.

The invention belongs to the technical field of coating self-repairing, and relates to a preparation method of a modified urea formaldehyde microcapsule containing a drying oil repairing agent. Preparing the microcapsule by using a two-step in-situ polymerization method, wherein the microcapsule mainly comprises a capsule core and a capsule wall. Wherein the capsule core is a dry oil repairing agent, and the capsule wall is urea-formaldehyde resin copolymerized and modified by melamine. According to the microcapsule provided by the invention, the defect that the dry oil core material is easy to leak is overcome through a simple modification process while high repairability endowed by the dry oil capsule core is considered, and the storage life of a microcapsule product coated with the dry oil in an air environment is greatly prolonged.

The invention provides low-viscosity high-wear-resistance vehicle engine oil and a preparation method thereof, and belongs to the technical field of engine oil. According to the preparation method, an ionic liquid group is introduced through a reaction, a nano interlayer compound is constructed by combining surface modification of a metal-ionic liquid complex and silicon dioxide nanoparticles, and a microcapsule structure is formed through coating of a urea-formaldehyde prepolymer; the ionic liquid group provides a low friction coefficient and thermal stability, the silicon dioxide nanoparticles provide physical isolation and wear-resistant protection, and the microcapsules realize controlled release and dynamic repair of the lubricating components; a skeleton polymer is prepared through a reaction of polyamidoamine and epoxy chloropropane so as to provide abundant active sites, and oxidation resistance is improved through a synergistic effect of the skeleton polymer, hindered phenol and calixarene; by combining oleic acid modified nanoparticles, the dispersity and the wear resistance are enhanced, and meanwhile, dynamic protection is provided on a friction interface; the synergistic effect prolongs the service life of the engine oil and improves the high-temperature stability of the engine oil.

The invention discloses a preparation method and application of a polypyrrole-urea resin cross-linked photo-thermal energy storage phase change microcapsule, and aims to solve the problems that an existing photo-thermal conversion material and a phase change energy storage material are compounded, interface bonding between the photo-thermal conversion material and the phase change material is not firm and the like. The preparation method comprises the following steps: 1, pretreating a pyrrole monomer and a phase change material; 2, mixing a phase change material and a pyrrole monomer to prepare an oil phase, and adding the oil phase into the water phase to obtain a water-in-oil emulsion; 3, mixing a ferric chloride solution with the urea formaldehyde prepolymer solution, adjusting the pH value of the system to 3-4, and dropwise adding the mixed solution into the water-in-oil emulsion to obtain a reaction solution; 4, heating and carrying out a cross-linking reaction; 5, blocking and stabilizing; and 6, washing and drying. According to the preparation method disclosed by the invention, simultaneous coating of polypyrrole and urea-formaldehyde resin is realized through a one-step method cooperating with in-situ polymerization, the two polymers form an interpenetrating network structure on an oil-water interface, and the special structure remarkably improves the mechanical strength and thermal stability of the microcapsule.

The invention relates to the technical field of fertilizer production and industrial solid waste resource utilization, and particularly discloses a method for producing a urea formaldehyde polyglutamic acid compound fertilizer from phosphorus and potassium mixed acid raffinate. According to the method, phosphorus-potassium mixed acid slurry, polyglutamic acid and urea formaldehyde are used as main raw materials, and the preparation method comprises the steps of raw material reaction and mixed acid preparation, multi-stage neutralization and functional agent mixing, slow-release nitrogen source mixing, returned material pretreatment and granulation, screening and wrapping, process waste heat recovery and the like. The product disclosed by the invention can be applied as a special compound fertilizer with nutrient slow release and biological stimulation functions, and has the advantages of balanced nutrients, high utilization rate and capability of improving soil. Besides, according to the preparation method, high-valued resource utilization of the phosphorus-potassium mixed acid raffinate is achieved, and through ammoniation pretreatment of returned materials and systematic recovery of reaction waste heat, the preparation method has the advantages that the raw material cost is reduced, the product performance is improved, and the production energy consumption is reduced.

The application relates to a composite film material, a urea-formaldehyde product and a preparation method thereof, and a toilet bowl. The composite film material comprises a modified film material, the modified film material comprises a reinforcing cloth and a PVB matrix coated on the surface of the reinforcing cloth and filled in the reinforcing cloth, the total thickness of the modified film material is 0.1mm-2mm, the modified film material is provided with a plurality of through holes arranged in the thickness direction, and the diameter of each through hole is 1mm-5mm; the grammage of the reinforcing cloth is 10g / m 2 ~120g / m 2 ; the material for preparing the PVB matrix comprises PVB 85-92 parts and a plasticizer 8-15 parts in mass fraction, the total mass fraction of the PVB and the plasticizer is 100 parts, and the viscosity of a 10% PVB ethanol solution at 20 DEG C is 30s-120s. The composite film material has high hardness and high impact resistance, is applied in the urea-formaldehyde product, and is favorable for improving the impact resistance of the urea-formaldehyde product.

The application discloses a kind of high activity catalyst and utilize the catalyst in aqueous phase 5-hydroxymethylfurfural one-step hydrogenation preparation 2,5-tetrahydrofuran dimethyl alcohol method.The catalyst described in the application directly introduces nickel salt into furfuryl alcohol urea formaldehyde resin, then the obtained resin is calcined under hydrogen atmosphere to obtain metallic nickel-based catalyst, because the catalyst has excellent affinity with HMF, HMF can be selectively prepared THFDM under relatively mild reaction conditions in aqueous phase, and the yield of THFDM is up to 93%.The catalyst preparation process of the application is simple, the hydrogenation reaction condition is mild, the yield of THFDM is high, and HMF crude product aqueous solution can be used as substrate, and it has good industrial application prospect.In addition, HMF has good water solubility, considering the principles of green and sustainable chemistry, water is used as reaction medium, compared with expensive organic solvent, the post-processing cost can be greatly reduced.

The invention belongs to the technical field of melamine modified urea-formaldehyde rubber powder, and particularly relates to ENF-grade melamine modified urea-formaldehyde rubber powder as well as a preparation method and application thereof. The ENF-grade melamine modified urea-formaldehyde rubber powder is prepared from the following components in parts by weight: 50 to 60 parts of urea, 90 to 110 parts of a formaldehyde solution, 10 to 15 parts of melamine, 0.2 to 0.5 part of hyperbranched polyglycerol and 10 to 20 parts of a cellulose porous material. The specific hyperbranched polyglycerol and cellulose porous material are adopted, under the specific preparation method, the melamine modified urea-formaldehyde glue powder with the low free formaldehyde content can be obtained, the formaldehyde emission of the prepared plywood is smaller than 0.025 mg / m, the ENF-level requirement is met, and meanwhile the plywood has the excellent bonding strength and water resistance.

The invention discloses a flame-retardant polyester modified urea-formaldehyde adhesive as well as a preparation method and application thereof, and belongs to the technical field of wood processing and artificial board adhesives. The preparation method comprises the following steps: mixing glycerol and maleic anhydride, and carrying out first heating reaction to obtain a polyester prepolymer; mixing the polyester prepolymer and glycerin, and carrying out a second heating reaction to obtain functionalized hyperbranched polyester; dissolving the functionalized hyperbranched polyester in acetonitrile, then adding phenylphosphoryl dichloride for reaction, heating and stirring for reaction, and removing the solvent and byproducts after the reaction is finished to obtain hyperbranched flame-retardant polyester; and uniformly mixing the hyperbranched flame-retardant polyester aqueous solution, urea-formaldehyde resin and water to obtain the modified urea-formaldehyde adhesive. Through an innovative strategy of'structural design-chemical bonding ', the long-standing core contradiction that'flame retardance-performance' is difficult to consider in urea resin flame-retardant modification is successfully solved, an efficient and durable flame-retardant modification solution with excellent comprehensive performance is provided, and the industrial application value is significant.

This invention discloses a supported anti-sulfurization reducing agent and its preparation method, relating to the technical field of rubber additives. A supported anti-sulfurization reducing agent includes an adhesive layer and an inner capsule. The adhesive layer is formed by blending a carrier rubber and a fatty acid salt. The inner capsule includes a core material and an inner capsule wall. The core material is the anti-sulfurization reducing agent, while the inner capsule wall is formed by reacting and curing an amino-modified liquid isoprene rubber and a urea-formaldehyde prepolymer. This application, by using microencapsulation, prepares an anti-sulfurization reducing agent with a double-layered supported structure. This not only effectively improves the problems of poor compatibility and difficult dispersion of pure anti-sulfurization reducing agents in rubber compounds, but also effectively protects the active ingredients, which is beneficial for improving the actual utilization rate of the anti-sulfurization reducing agent, reducing the amount of anti-sulfurization reducing agent added, and thus reducing the production cost of rubber products.

This invention relates to the field of adhesive technology and discloses an anti-aging phenolic resin-based urea-formaldehyde adhesive and its preparation method. The adhesive is composed of 95-100 parts phenol, 120-160 parts 37% formaldehyde solution, 80-110 parts urea, 3-4.5 parts modifier, 1.5-1.8 parts curing agent, and 1.8-2.2 parts anti-aging agent. The preparation method includes four steps: preparation of phenolic resin prepolymer, preparation of urea-formaldehyde resin prepolymer, composite modification, and post-treatment. This invention, through the synergistic effect of composite modification and anti-aging agent, solves the defects of traditional urea-formaldehyde adhesives, such as high formaldehyde release, poor anti-aging performance, and insufficient water resistance, while possessing excellent environmental friendliness, adhesion, and durability, making it suitable for fields such as the production of engineered wood products.

The application discloses a urea-formaldehyde composite material and a preparation method and application thereof, wherein the urea-formaldehyde composite material comprises urea-formaldehyde particles and a toughening agent, and the toughening agent is an acetal polymer. The urea-formaldehyde composite material can realize anti-cracking of urea-formaldehyde products without changing ceramic texture and high hardness of urea-formaldehyde material, and the preparation process of the urea-formaldehyde composite material is simple and easy to carry out large-scale production.

The invention relates to the technical field of epoxy resin adhesives, and discloses a waterproof epoxy resin-based urea-formaldehyde adhesive and a preparation method thereof, and the waterproof epoxy resin-based urea-formaldehyde adhesive comprises the following components by weight: 50-60 parts of urea-formaldehyde resin, 15-20 parts of bisphenol A epoxy resin, 1-1.5 parts of a filler, 1-1.5 parts of a waterproof agent, 1-1.2 parts of an auxiliary agent, and 2-3 parts of diethylenetriamine. According to the waterproof agent, 4-nitrodichlorophenyl phosphate and perfluorohexyl ethyl alcohol serve as raw materials, fluorine-containing groups are introduced through two-step reaction, fluorine-containing chain segments have extremely high hydrophobicity, a surface hydrophobic layer can be formed after the urea-formaldehyde glue is cured, water molecule permeation is hindered, good waterproof performance is achieved, meanwhile, the urea-formaldehyde glue has good flame retardance, and the waterproof performance is good. And the self-repairing effect is achieved.

The utility model relates to the technical field of urea formaldehyde compound fertilizer production, and discloses a urea formaldehyde preparation system, which comprises a reaction tank and an intermediate tank, the reaction tank is communicated with a water inlet pipe, an air inlet pipe, a feed inlet and a liquid outlet pipe; a first conveying pump is arranged on the liquid outlet pipe; the other end of the liquid outlet pipe is communicated with a middle tank, the middle tank is communicated with a discharging pipe, a second conveying pump is arranged on the discharging pipe, a plurality of spray heads are arranged at the other end of the discharging pipe, and the spray heads extend into a secondary dryer or a granulator. According to the scheme, urea and formaldehyde react to form the urea formaldehyde solution, and then the urea formaldehyde solution is sprayed on the surface of the compound fertilizer to form the urea formaldehyde slow-release compound fertilizer, so that the coating uniformity of urea formaldehyde on the surface of the compound fertilizer is effectively improved, and the slow-release uniformity of the urea formaldehyde compound fertilizer is improved.

The invention discloses a modified montmorillonite-based lubricant and a preparation method thereof, and belongs to the technical field of lubricants, oleic acid and diethylenetriamine are cyclized and quaternized to prepare an oleic acid-based imidazoline quaternary ammonium salt corrosion inhibitor, the oleic acid-based imidazoline quaternary ammonium salt corrosion inhibitor is used for organic modification of nano montmorillonite, a silane coupling agent is further adopted for silanization treatment, and the modified montmorillonite-based lubricant is prepared. The preparation method comprises the following steps: preparing silane modified corrosion-inhibition montmorillonite, carrying out in-situ polymerization coating by taking a urea-formaldehyde prepolymer as a wall material to form montmorillonite modified corrosion-inhibition microcapsules, and carrying out copolymerization on acrylic acid, N, N-bis (2-hydroxyethyl) aminomethylene diethyl phosphonate and trifluoromethacrylate to obtain the modified polyacrylate dispersant with heat-resistant and dispersion-stable functions. The microcapsule, a dispersing agent, dibasic acid ester oil, PAO base oil and an antioxidant are compounded in proportion to form the modified montmorillonite-based lubricant.

The present invention relates to the technical field of slow / controlled-release chemical fertilizers, in particular to an integrated preparation process and application method for a urea-formaldehyde-based multi-nutrient biodegradable polymeric slow / controlled-release liquid fertilizer and granular fertilizer. The preparation method comprises the following steps: first, preparing a hydroxymethyl urea solution, then adding a portion of the obtained hydroxymethyl urea solution into a reactor for preparing a liquid fertilizer, and finally obtaining a polymer slow / controlled-release liquid fertilizer; feeding the remaining portion of the obtained hydroxymethyl urea solution into an integrated reaction-extrusion machine, generating a urea-formaldehyde polymer by means of polycondensation reactive extrusion in a double-screw reactive extruder of a reaction unit of the integrated reaction-extrusion machine, and finally obtaining a polymeric slow / controlled-release granular fertilizer. The present invention allows for the simultaneous production of a urea-formaldehyde-based multi-nutrient biodegradable polymeric slow / controlled-release liquid fertilizer in two different forms, namely, a liquid form and a solid, granular form, using a single set of equipment, and the process is simple and environmental-friendly.

A method for integrally preparing urea-formaldehyde (UF)-based multi-nutrient biodegradable polymeric slow-release (SR) liquid and granular fertilizers is provided. A hydroxymethylurea solution is prepared, and a part of the hydroxymethylurea solution is added to a reactor for reaction to obtain the UF-based multi-nutrient biodegradable polymeric SR liquid fertilizer. The rest of the hydroxymethylurea solution is fed into a reaction-extrusion integrated machine for reactive extrusion to obtain a UF polymer through the polycondensation reaction, which is extruded, dried and granulated to obtain the UF-based multi-nutrient biodegradable polymeric SR granular fertilizer. A method for applying such liquid and granular fertilizers is also provided.

The present invention discloses a hydrophobic microporous urea-formaldehyde foam material and a preparation method thereof, which belong to the field of polymer chemical modification. The preparation of the above-mentioned urea-formaldehyde foam material includes the following raw materials: urea-formaldehyde resin modified by amphiphilic macromolecules, a foaming agent and a curing agent, the amphiphilic macromolecules including a hydrophilic end and a hydrophobic end, the hydrophilic end is used for reaction connection with the urea-formaldehyde resin, and the hydrophobic end is used for reaction connection with the foaming agent. The present invention connects the amphiphilic macromolecule bond to the urea-formaldehyde molecular network, so that it self-assembles in the urea-formaldehyde water-based system to form a micro-nano assembly structure with rich morphology; adjusts the affinity of the foaming agent and the hydrophobic chain segments in the assembly structure, induces the foaming agent to be dispersed in the hydrophobic chain segment aggregates of the assembly, and simultaneously regulates the foaming and curing process, restricts the nucleation and growth of the foam cells and fixes them inside or around the hydrophobic chain segment aggregates of the micro-nano assembly, exerts the strong hydrophobic coating effect of the hydrophobic chain segments on the bubble wall, gives the urea-formaldehyde foam a long-lasting hydrophobic function, and realizes the construction of a microporous structure.

The process comprises the following steps: S1, adding urea and a formaldehyde solution into a reaction kettle according to a molar ratio of 1: (1.8-2.2), then adding sodium hydroxide to adjust the pH value to 7.0, and carrying out a stirring reaction to generate a hydroxymethyl urea solution; adding sulfuric acid into the hydroxymethyl urea solution, adjusting the pH value to 4.5, and continuously stirring for reaction to obtain a urea formaldehyde solution; s2, weighing casein, glutamic acid, asparaginic acid and water in proportion, and uniformly mixing to obtain a synergistic solution; s3, weighing urea, monoammonium phosphate, potassium chloride, modified charcoal, polyethylene glycol and sodium carboxymethyl cellulose, and uniformly mixing to obtain a solid mixture; s4, putting the solid mixture into a rotary drum granulator, respectively spraying a urea formaldehyde solution and a synergist into a solid mixture bed through a granulation spray head, synchronously spraying liquid ammonia and sulfuric acid through a special spray head, and enabling the liquid ammonia and the sulfuric acid to generate a neutralization reaction on the surface of the solid mixture to obtain a compound fertilizer precursor; and S5, drying the compound fertilizer precursor to obtain the compound fertilizer.

The invention discloses a microcapsule based on vibration-induced emission and a preparation method and application thereof.The microcapsule comprises a core material and a capsule wall wrapping the outer surface of the core material, the core material comprises a dihydrodibenzophenazine derivative and a core material solvent, and the capsule wall is of a double-layer structure and comprises a polyurethane inner capsule wall and a polyurea formaldehyde outer capsule wall. According to the present invention, the dihydrodibenzophenazine derivative having the vibration-induced emission characteristic is adopted as the fluorescent dye, and the microcapsule release technology is combined so as to achieve the mechanochromic function; the microcapsule is doped in a polymer matrix, when the polymer is subjected to external force, the embedded microcapsule is broken, the fluorescence color is changed from red to blue, and the deformation of the polymer can be monitored in real time.

The application discloses a kind of composite toughening material, article and its preparation method, the composite toughening material is made of shell material and core material wrapped in the shell material;Wherein, the composite toughening material has excellent toughening effect, has good adhesion and compatibility to existing material, for example, urea-formaldehyde, realizes cover plate product crack resistance without changing the ceramic texture and high hardness of urea-formaldehyde material quality, and the composite toughening material production process is simple, easy to mass production and marketization.

The application belongs to the technical field of anticorrosive coating, and particularly discloses a self-warning and self-repairing coating based on microcapsules, and a preparation method and application thereof. The components are as follows: 10-13 parts of bisphenol A diglycidyl ether, 6-9 parts of a diluent, 7-9 parts of a curing agent, and 1 part of TH@PU / UF microcapsules; wherein the TH@PU / UF microcapsules comprise a core material and a shell layer coated on the surface of the core material; the core material comprises tetraphenyl ethane and hexamethylene diisocyanate, and the shell layer is a polyurethane / urea-formaldehyde shell layer. The coating can obtain a self-warning and self-repairing coating by being coated as a primer and then being coated with a topcoat. When the coating is damaged, the core material is released, thereby playing a self-repairing role and a self-warning role of the coating. In addition, the coating also has excellent corrosion resistance in a deep-sea environment, thereby solving the problem of rapid decline of the protective performance of the coating caused by deep-sea factors.

This invention relates to the field of resin preparation technology, and particularly to a method for preparing a water-soluble etherified phenol-urea-formaldehyde mixed resin, comprising the following steps: S1, adding an alkaline catalyst, formaldehyde, urea, and molten phenol to a reaction vessel for reaction, stirring and heating to 40-50°C for 4-5 hours; S2, adding an organic acid to the reaction system in step S1 under stirring to adjust the pH value to 4.9-5.4; S3, adding urea and thiourea to the reaction vessel and reacting at a reaction temperature of 45°C for 60 minutes; S4, adding an alcohol compound to the reaction vessel, raising the reaction temperature to 50°C and reacting for 60 minutes; S5, adding an alkaline solution to the reaction system obtained in step S4 to adjust its pH value to 6.5-6.8, and then stirring at 50°C to obtain the water-soluble etherified phenol-urea-formaldehyde mixed resin. The water-soluble etherified phenol-urea-formaldehyde mixed resin material prepared by this method has good water solubility and low viscosity, which can improve the profile control and water shut-off effect in oil fields.

The present application relates to the technical field of coated abrasive, and particularly relates to a preparation process of sharp ceramic abrasive cloth for louver disc. The technical points are as follows: S1, pretreatment of the base body; S2, unwinding treatment of the base body; S3, continuous roll coating of the base body surface with a bottom glue layer; S4, sand implantation on the bottom glue layer and pre-drying; S5, continuous roll coating of the bottom glue layer with a glue layer and drying; S6, solidification after hot winding; S7, kneading and humidification treatment; S8, continuous roll coating of the base body with a functional coating and drying; S9, normal temperature winding; S10, inspection and winding separation; wherein, the pretreatment of the base body is to immerse the base material in a urea-formaldehyde-phenol-formaldehyde-polyvinyl alcohol-latex-coupling agent modified water solution resin, and then heat to 150-250 DEG C for drying and solidification, and then directly cool to below 90 DEG C. The abrasive cloth provided by the present application has higher grinding efficiency and sharper grinding, and the manufacturing process of the abrasive cloth is stable and reliable.

The utility model discloses a kind of urea formaldehyde resin storage tanks with low aldehyde emission structure, it is related to urea formaldehyde resin storage technical field, including tank body and discharge mechanism, the top of tank body is fixedly connected with discharge mechanism, and discharge mechanism includes the ventilation pipeline fixedly connected in the position of tank body outer surface, the outer surface of ventilation pipeline is provided with ventilation valve, and the top of ventilation pipeline is fixedly connected with adsorption tower, the inside of adsorption tower is provided with activated carbon adsorption layer, and the top of activated carbon adsorption layer is fixedly connected with molecular sieve composite adsorption layer, ventilation pipeline is stainless steel material, strong corrosion resistance, its outer surface is connected ventilation valve through flange.The urea formaldehyde resin storage tank with low aldehyde emission structure compared with existing ordinary urea formaldehyde resin storage tank, prolongs pipeline life, stabilizes tank pressure, improves waste gas purification and environmental protection, reduces cost, and enhances coating adhesion, reduces corrosion rate, guarantees resin purity, reduces cleaning and leakage risk.

The invention provides a rubber vulcanizing aid, a preparation method and application thereof. The rubber vulcanization aid is prepared from the following components in parts by weight: 60 to 80 parts of urea formaldehyde-ammonium sulfite compound, 3 to 8 parts of aminopropyl silane, 10 to 30 parts of carrier and 0.5 to 1 part of antioxidant, the rubber vulcanizing aid provided by the invention is stable in structure and resistant to high temperature, the aid is ensured to be still effective in rubber processing and vulcanizing processes, and high thermal stability is provided by covalent grafting; the molecular weight is large, the structural rigidity and mobility are reduced, and the appearance and physical property consistency of the product are improved; a plurality of active ammonium sulfite sites are uniformly distributed, multi-point activation is provided, and the vulcanization rate is increased; the stable covalent network structure can form a microcosmic uniformly dispersed auxiliary phase, is more beneficial to a rubber cross-linked network, reduces stress concentration points, has positive effects on aging resistance, heat resistance and oxidation resistance, and enhances the physical properties of rubber.

The present invention relates to lignocellulosic nanofibres (LNFC) or biopolymeric reinforcing nanoadditive as a mechanical reinforcement of low-molar-ratio phenol formaldehyde (PF) and urea formaldehyde (UF) thermosetting adhesives, wherein the use of natural nanocompounds based on lignin and cellulose makes the nanoadditive or nanofibre a "green" or environmentally friendly additive, said additive being useful in the production of wood-based composites. The LNFCs are made by means of a process that does not involve chemical additives and which is based on thermomechanical wood pulp, using microshredding and high-pressure microfluidsation. The present natural nanoadditive or natural reinforcement fibre is intended for the industry of manufacturing plywood, medium density fibreboard (MDF) and particleboard.

The present application relates to carbon capture and storage technology field, especially to a kind of modified resin carbon dioxide capture agent and its preparation method and regeneration method, comprising the following weight parts of raw materials: urea formaldehyde resin 2-10 parts, cysteine 0.5-2 parts, chitosan 1-5 parts, gelatin 5-15 parts, titanium dioxide 0.5-2 parts and N-hydroxyethyl piperazine 4-8 parts.The modified resin carbon dioxide capture agent obtained by careful design of raw material combination and interaction, its internal abundant active site and pore structure significantly improve its carbon dioxide adsorption capacity;At the same time, it not only has good anti-UV aging ability, but also can catalyze the decomposition of NO X Reduce its damage to resin, so that the resin can maintain good performance stability during long-term use;Finally, the interaction of various components in the resin makes the modified resin form a strong anti-interference structure, and this structure can make the modified resin still maintain good capture performance in complex environment.

The invention discloses a compound fertilizer for preventing and treating asparagus stem blight and a preparation method thereof, and belongs to the technical field of agriculture. The compound fertilizer for preventing and treating asparagus stem blight is prepared from the following raw materials in parts by mass: 220 to 240 parts of chicken manure, 80 to 90 parts of rice straw, 5 to 7 parts of urea, 2.5 to 4 parts of urea formaldehyde, 10 to 12 parts of plant ash, 0.5 to 2 parts of potassium chloride, 8 to 10 parts of calcium superphosphate, 0.1 to 0.4 part of sodium molybdate, 0.1 to 0.5 part of diethyl aminoethyl hexanoate and 5 to 8 parts of biomass charcoal. According to the designed preparation scheme of the compound fertilizer for preventing and treating the asparagus stem blight, the yield and quality of asparagus can be improved, the asparagus stem blight can be effectively prevented and treated, and drug resistance is not prone to being generated. Moreover, the fertilizer scheme is lower in production cost, green, pollution-free and longer in fertilizer efficiency, can reduce the topdressing frequency when being used for topdressing of asparagus, and has a very good application prospect.