299results about How to "High solid content" patented technology

The invention relates to a preparation method of a high-precision gel injection pressureless sintering silicon carbide ceramic water jet cutter sand pipe, which comprises the following steps: pouring premixed liquid into a mold, and curing to obtain a green body; the inner mold is taken out of the cured blank, then the outer mold and the blank are put into a polyethylene glycol solution to be dried, the blank shrinks when being dried in the polyethylene glycol solution, and demolding is completed; drying the demolded green body on drying equipment, and carrying out vacuum heating to obtain a dried green body; and carrying out pressureless sintering on the dried blank to obtain the silicon carbide ceramic water jet cutter sand pipe. The premixed liquid comprises a monomer, a cross-linking agent, a dispersing agent, a defoaming agent, modified silicon carbide powder, a sintering aid and tetramethylammonium hydroxide, and the modified silicon carbide powder comprises graphene composite silicon carbide and modified carbon nanotubes. The water jet cutter sand pipe has the effect of improving the product quality of the prepared water jet cutter sand pipe.

The invention discloses a hydroxylation modified ceramic particle, a photocuring ceramic slurry and a preparation method thereof.The preparation method of the hydroxylation modified ceramic particle comprises the following steps that after ceramic powder is flatly laid, plasma working gas is introduced into the ceramic powder, a plasma power source is started to generate plasma, the ceramic powder is treated for set time, and the photocuring ceramic slurry is obtained; and uniformly spreading the ceramic powder again, and continuously treating for a set time to obtain the hydroxylation modified ceramic particles. The method for modifying the ceramic particles based on DBD plasma hydroxylation is simple in process, low in cost and easy to regulate and control, the hydroxylation degree of the ceramic particles can be achieved only by adjusting discharge voltage, frequency, treatment time and ventilation flow, no solvent is involved in the hydroxylation modification process of the ceramic particles, almost no waste is generated, and the method is suitable for industrial production. And original ceramic particles are not polluted.

The invention provides a hyperbranched polysiloxane coating corrosion inhibitor and a preparation method thereof, a hyperbranched polysiloxane epoxy anticorrosive paint and a preparation method and application thereof. The hyperbranched polysiloxane coating corrosion inhibitor is prepared by catalytic reaction of p-dimethylaminobenzaldehyde and small molecular silane in an alcoholic solution. The coating comprises 30-50 parts of epoxy resin, 20-35 parts of a hyperbranched polysiloxane coating corrosion inhibitor, 5-10 parts of an active diluent, 2-2.5 parts of a silane coupling agent, 15-30 parts of filler, 1.5-2.5 parts of an auxiliary agent and 15-20 parts of a curing agent. Compared with the prior art, an imine group in hyperbranched polysiloxane and a metal substrate form a stable complex, the stable complex is adsorbed on the metal surface to form a protective film, the erosion rate of a corrosive medium to the metal substrate is effectively reduced, the corrosion resistance of a coating is improved, meanwhile, the coating prepared by adopting the reactive diluent is high in solid content and good in corrosion resistance, and the service life of the coating is prolonged. VOC emission in the paint film curing process is low.

The invention relates to the field of phenolic resin adhesives, and particularly discloses a preparation method of a phenolic resin adhesive for a bamboo oriented strand board, which comprises the following steps: (1) phenol activation: adding phenol and a basic catalyst aqueous solution into a reaction kettle, and activating to form an intermediate state of phenate negative ions; (2) addition stage: adding a high-concentration formaldehyde reactant into the reaction kettle, and carrying out heat preservation reaction to generate hydroxymethyl phenol; (3) heating and replenishing: heating to 80 + / -2 DEG C, keeping the temperature, replenishing the formaldehyde aqueous solution into the reaction kettle, and keeping the temperature for 20-25 minutes; (4) polycondensation stage: adding a basic catalyst aqueous solution, heating to 90 + / -2 DEG C, and carrying out heat preservation reaction; and (5) terminating the reaction: after the heat preservation reaction, detecting the viscosity, cooling, and discharging to obtain the adhesive. The phenolic resin with the solid content of 60% or above can be prepared, the adhesive has excellent bonding performance, and the prepared shaving board is excellent in mechanical strength.

The present invention discloses a polyurea-ceramic composite coating for the leading edge of a wind turbine blade and a preparation method thereof. The coating comprises aspartic acid ester polyurea and ceramics. The ceramics have good strength and hardness, and can improve the hardness and toughness of the coating as a whole, and improve the overall anti-rainwater erosion performance of the coating. Specifically, the polyaspartic acid ester polyurea is made of polyetheramine, diisocyanate, polyaspartic acid ester resin and isocyanate as raw materials, and the polyetheramine is a hydrophilic monomer, so that the system has good hydrophilicity, which is conducive to forming a water film on the leading edge surface of the wind turbine blade, and effectively buffering the impact of raindrops on the leading edge of the wind turbine blade.

The invention provides positive conductive paste, a positive plate and a lithium ion battery. The positive electrode conductive paste comprises a solid and a solvent, and the positive electrode conductive paste comprises the following components in percentage by mass of the solid: 0.02%-0.05% of a single-walled carbon nanotube, 0.3%-0.7% of a carbon black conductive agent, 0.1%-0.5% of a softening agent, 0.1%-0.5% of a dispersing and anti-cracking integrated auxiliary agent, 96%-98% of a positive electrode active material and 1%-2.25% of a binder. By adding the single-walled carbon nanotubes, the conductivity and mechanical properties of the positive electrode conductive paste are improved. And the softening agent improves the rheological property of the positive electrode conductive paste and enhances the flexibility of the pole piece at the same time. And the dispersing and anti-cracking integrated auxiliary agent effectively disperses positive electrode active material particles and prevents coating and baking cracking. The high solid content achieved under the cooperative work of the three is beneficial to solving the problems of brittle failure, low coating rate, easy cracking of the pole piece and the like of the thick pole piece.

The present invention relates to an improved process for producing a product comprising a protein of interest (TP) capable of crystallizing under salt soluble conditions by crystallization of said TP. The present invention uses at least two different TP-containing protein feeds, which are mixed to produce a supersaturated protein solution in which TP crystallizes. One of the protein feeds must have a pH at least plus 0.1 to the pH (pHMCY, TP) providing the maximum crystallization yield of the TP, and one of the protein feeds must have a pH at most minus 0.1 to the pHMCY, TP.

The invention provides nitrogen-doped carbon-coated lithium manganese iron phosphate as well as a preparation method and application thereof, and relates to the technical field of lithium ion batteries. Specifically, a solution containing a phosphorus source, a lithium source, an iron source and a manganese source is mixed and ground to obtain a first material; a dispersing agent is added into the first material, mixing and grinding are conducted, a second material is obtained, and the dispersing agent comprises at least one of chitosan, polyvinylpyrrolidone or polyethyleneimine; and sequentially carrying out spray drying, sintering and crushing on the second material to obtain the lithium iron manganese phosphate positive electrode material. By adopting a specific type of organic dispersing agent and introducing through a specific technological process, grain agglomeration can be effectively avoided, and the conductivity and carbon coating stability of the lithium manganese iron phosphate material are improved, so that the electrochemical performance of the positive electrode material is effectively improved; meanwhile, the preparation method is simple and easy to implement, and has a prospect of batch application.

The invention provides a dispersing agent composition for dispersing a lithium iron phosphate precursor, a lithium iron phosphate positive electrode material and a secondary battery. The dispersing agent composition comprises a first dispersing agent and a second dispersing agent; the first dispersing agent is selected from any one or a combination of at least two of sulfonate, sulfate, organic ammonium salt, polyoxyethylene ether, cross-linked modified polyoxyethylene, phosphate and derivatives thereof, alkoxy polyethylene glycol silane, polyhydroxy alcohol or high fructose corn syrup; the second dispersing agent is selected from any one or a combination of at least two of polyoxyalkylene ether and a derivative thereof, polyether modified polysiloxane, unsaturated carboxylate and a derivative thereof, quaternary ammonium salt, alkyl sulfonate, alkyl sulfonate, polyethylene glycol and a derivative thereof or polyamino amide. The dispersant composition provided by the invention not only can significantly improve the solid content of the lithium iron phosphate precursor, but also can reduce the water consumption in the preparation process of lithium iron phosphate.

The invention relates to the technical field of lithium ion batteries, in particular to an in-situ dispersed lithium ion battery positive electrode slurry and a preparation method thereof.The preparation method comprises the steps that firstly, a binder and a solvent are fully dissolved to form a glue solution, polyacrylic acid and a sodium source are introduced to be dissolved for in-situ dispersion to obtain a dispersion stock solution, then a dispersing agent B is added, stirring is conducted, and the in-situ dispersed lithium ion battery positive electrode slurry is obtained; the preparation method comprises the following steps: adding a dispersing agent into a reaction kettle, carrying out hydrothermal reaction at a certain temperature for a certain time to obtain a dispersion final solution, adding a conductive agent and an active material into the dispersion final solution, carrying out high-speed granulation stirring, adding a solvent after stirring, adjusting to a proper slurry viscosity, defoaming, and screening to finally prepare the highly dispersed lithium ion battery positive electrode slurry. According to the lithium ion battery positive electrode slurry prepared by the method, the dispersity and stability of the slurry can be greatly improved, the uniformity of the interior of a pole piece is realized, the conductivity of the pole piece is improved, the internal resistance of the battery is reduced, the excellent rate capability and cycle performance of the battery are further realized, and the discharge capability of the battery in a low-temperature environment is improved.

The invention belongs to the technical field of ceramic materials, and particularly discloses whisker toughened zirconium oxide-aluminum oxide composite ceramic and an additive manufacturing method thereof, the composite ceramic comprises the following components by mass: 94 parts of zirconium oxide toughened aluminum oxide ceramic and 5 parts of silicon carbide whisker; the zirconium oxide toughened aluminum oxide ceramic is prepared from the following components in parts by mass: 76 parts of aluminum oxide and 24 parts of zirconium oxide, and 3mol% of yttrium oxide is added into the zirconium oxide. According to the whisker toughened zirconium oxide-aluminum oxide composite ceramic and the additive manufacturing method thereof, the preparation method has unique design of components and process, and the preparation of a high-density and high-performance ceramic-based composite material part based on a fused deposition modeling technology is successfully realized. Further, the prepared silicon carbide whisker toughened zirconium oxide-aluminum oxide-based composite ceramic has relatively high density and excellent obdurability.

The invention belongs to the technical field of photocatalytic materials, and provides a foamed ceramic-based catalyst as well as a preparation method and application thereof. The method comprises the following steps: S1, sequentially carrying out surface alkali treatment, surfactant modification and surface grafting modification on an organic foam template to obtain a modified foam template; s2, preparing a plurality of ceramic slurry with different solid contents, wherein the ceramic slurry comprises the following components: a binder, a rheological agent, a dispersant, a plasticizer, a zirconium oxide stabilizer, zirconium oxide, manganese dioxide, titanium dioxide, silicon dioxide and a solvent; s3, according to the slurry hanging sequence of the solid contents from high to low, ceramic slurry with different gradient solid contents is sequentially coated and hung on the surface of the modified foam template, drying and sintering are conducted, and the foamed ceramic-based catalyst is obtained. According to the invention, the surface of the organic foam template is modified, the components of the ceramic slurry are reasonably designed, and the ceramic slurry with gradient solid content is adopted for multiple times of slurry hanging, so that the porosity and compression strength of the foamed ceramic-based catalyst are simultaneously improved.

The invention discloses a diffusion source, a preparation method of the diffusion source and a processing method of a neodymium-iron-boron magnet. The diffusion source comprises aluminum or aluminum alloy foil, wherein rare earth element-containing particles, non-rare earth metal oxide and non-rare earth metal are attached to the upper surface and the lower surface of the aluminum or aluminum alloy foil respectively; the rare earth elements in the rare earth element-containing particles are selected from one or more of terbium, dysprosium, praseodymium and neodymium; the rare earth element-containing particles are selected from one or more of rare earth hydride particles, rare earth fluoride particles and rare earth metal particles; the non-rare earth metal oxide is selected from one or more of aluminum oxide and magnesium oxide; the non-rare earth elements in the non-rare earth metals are selected from one or more of copper, aluminum, magnesium, iron, zirconium, niobium and gallium. The diffusion source can reduce the use amount of rare earth elements and effectively improve the coercive force of the neodymium-iron-boron magnet.

The invention provides high-reliability photovoltaic OBB dispensing glue and a preparation method thereof. The high-reliability photovoltaic OBB dispensing glue specifically comprises glue consisting of 2D resin modified acrylate resin, an anti-yellowing acrylate monomer and a photoinitiator. 2D resin modified hydroxyethyl acrylate is added into the glue, so that the adhesive force, the water resistance and the chemical resistance of the glue are effectively improved; by introducing the yellowing-resistant acrylate monomer, the yellowing resistance and the comprehensive performance of the glue are enhanced; meanwhile, due to the optimal proportion of the photoinitiator, the curing rate of the glue is remarkably increased. The prepared photovoltaic OBB dispensing glue has the characteristics of high solid content, high stability, good weather resistance, excellent mechanical properties and the like, is particularly suitable for packaging application of photovoltaic modules, can keep excellent properties in a harsh environment, and meets environmental protection requirements.

The invention discloses a high-thermal-conductivity ceramic material and an additive manufacturing method thereof. The method comprises the following steps: ball-milling and mixing aluminum nitride, a sintering aid, a first wetting dispersant and an organic solvent, and then drying and sieving to obtain modified aluminum nitride powder; carrying out vacuum ball-milling mixing on the photocuring prepolymer and a photocuring monomer to obtain a photocuring premixed solution; under a dark condition, carrying out vacuum ball-milling mixing on the modified aluminum nitride powder, the photocuring premixed liquid, a second wetting dispersant, a plasticizer and a photoinitiator to obtain photocuring ceramic slurry; carrying out layer-by-layer printing and curing by adopting photocuring ceramic slurry to obtain an aluminum nitride ceramic green body; and sequentially cracking, degreasing and sintering the aluminum nitride ceramic green body to obtain the high-thermal-conductivity ceramic material. The prepared aluminum nitride ceramic body is strong in interlayer bonding, high in solid content and high in precision, and the heat conductivity of the sintered aluminum nitride ceramic body is higher than 200W / m.K. The method provided by the invention has simple process steps.

The present invention relates to a method for improving the drying quality and functional factors of fruits and vegetables by low-temperature freeze-thaw combined with integrated immersion freeze-drying, and belongs to the technical field of fruit and vegetable drying processing. The method uses fruits and vegetables with solid content less than 12% as raw materials, adopts a cyclic low-temperature freeze-thaw method to complete the freeze-thaw link of the material in a frozen state, selects small molecule peptides, functional oligosaccharides, and soluble dietary fiber as sugar substitutes to increase the solid content and functional factors, and adopts a fruit and vegetable raw water collection system to recover the water and flavor and pigment substances removed during the vacuum freeze-drying process. At the same time, the loss of nutrients is avoided by atomizing and spraying the impregnation liquid, and the pre-drying, vacuum impregnation, freezing, and post-drying processes are completed in one device. The patented method greatly improves the processing efficiency of dried fruit and vegetable products, reduces the loss of nutrients during the processing process, realizes the comprehensive utilization of fruit and vegetable raw water and flavor pigments, and enriches a variety of nutritional functional factors.

The invention provides a phosphate tailing solid-liquid separation filter aid and application. The filter aid is prepared from the following components in percentage by weight: 10 to 15 percent of water-soluble carbon nanotubes, 20 to 25 percent of maleic anhydride grafted ethylene glycol copolymer, 1 to 2 percent of nano titanium dioxide, 10 to 15 percent of C20-22 alcohol polyoxyethylene ether, 20 to 30 percent of cationic polyacrylamide, 5 to 10 percent of carboxymethyl cellulose, 2 to 5 percent of modified sodium silicate and 1 to 2 percent of nonylphenol polyoxyethylene ether. The filter aid disclosed by the invention is prepared into an aqueous solution with the concentration of 0.1-0.3%, and 50-110g / t of tailing dry basis is added in the flotation tailing thickening process, so that the concentration of thick ore pulp reaches more than 60%; before dense ore pulp is filtered, 50-100g / t of a filter aid of a tailing dry basis is added to act with the dense ore pulp, and then filter pressing work is performed, so that the flotation tailing solid-liquid separation effect is effectively improved, the single cycle time of filter pressing is shortened, the water content and viscosity of a filter cake are reduced, discharging is convenient, meanwhile, the service cycle of filter cloth can be prolonged, and the cleaning difficulty can be lowered; the method has important economic and environment-friendly significance.

The invention discloses a preparation method of a carbon source precursor for lithium iron phosphate. The preparation method comprises the following steps: firstly, carrying out auto-polymerization on glucose, fructose or cane sugar to obtain a polysaccharide aqueous solution, then adding ammonium citrate to adjust the pH value to 4-6, and finally adding vitamin C to obtain a macromolecular polysaccharide precursor; the precursor prepared by the invention can uniformly coat the surface of lithium iron phosphate in an airflow drying process, so that a uniform and compact carbon coating layer is obtained, and a lithium iron phosphate positive electrode with higher conductivity and higher compaction density can be obtained; the 1C charge-discharge capacity is improved by more than 7mAh / g, and the trailing phenomenon is also improved.

The invention discloses a protection liquid for green light cutting and a preparation method and application thereof.The protection liquid is prepared from, by mass, 20-40 parts of water-soluble resin, 0.25-0.5 part of a green light absorbent and 50-100 parts of a solvent; wherein the water-soluble resin comprises water-soluble polyester and sodium polystyrene sulfonate; the green light absorbent comprises allura red and lac acid. The water-soluble resin is not easy to etch, the etching selection ratio is high, and the etching depth required by the base material can be met under the condition that the loss of the protective film layer is minimum; the relatively high solubility of sodium polystyrenesulfonate is beneficial to improving the solid content of the resin, improving the thickness of a film layer and improving the stability of the protection liquid; besides, the green light absorbent adopts the combination of allura red and lac acid, so that the solution stability and the light stability of the green light absorbent can be ensured, the addition amount of the absorbent is increased, and the absorbance is improved.

The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a lithium-rich manganese-based positive electrode precursor material, a preparation method thereof, a positive electrode material and a battery. The lithium-rich manganese-based positive electrode precursor material comprises an inner core and a shell layer on the surface of the inner core, the inner core is formed by staggered arrangement of sheet-shaped primary particles, the shell layer is formed by radial arrangement of plate-shaped primary particles perpendicular to the surface of the inner core along a diametral plane, so that a loose-inside and tight-outside structure is formed, and the precursor material of the structure is good in stability and good in stability. And the lithium-rich manganese-based positive electrode material prepared from the lithium-rich manganese-based positive electrode material also has good cycling stability. The lithium-rich manganese-based positive electrode precursor material is prepared through a two-step coprecipitation method, and the preparation method is simple and controllable.

The present invention relates to the field of textile chemicals and high-performance fiber technology, and specifically to a polyacrylonitrile spinning solution, a preparation method thereof, and an application thereof. The preparation method of the polyacrylonitrile spinning solution comprises the following steps: (1) mixing a polyacrylonitrile resin with a first sodium thiocyanate aqueous solution at a temperature of 10 to 25°C, and dispersing and beating at a temperature of 15 to 25°C to form a slurry mixture; (2) mixing the slurry mixture with a second sodium thiocyanate aqueous solution at a temperature of 100 to 140°C, and then high-speed shearing at a temperature of 80 to 90°C to obtain a polyacrylonitrile spinning solution; the polyacrylonitrile resin has a number average particle size of 2 to 9 um, a particle size distribution index of 1.5 to 2.8, and a sedimentation value of 3.0 to 4.2. According to the preparation method of the present invention, the slurry viscosity in the preparation process of the polyacrylonitrile spinning solution is low, the fluidity is good, and it can be used for continuous production, and the prepared polyacrylonitrile spinning solution has a high solid content, a low viscosity, and good extrusion uniformity and stability.

The invention relates to a coating composition with anti-electrostatic discharge protection and a preparation method thereof, and relates to a coating system for anti-electrostatic discharge protection, especially a floor coating system, comprising the coating composition.

The invention relates to a polyamic acid solution, a preparation method thereof and a raw material composition for preparing the polyamic acid solution. The polyamide acid solution which has high solid content and low dynamic viscosity, is convenient for subsequent material processing, is easy to store and has high stability can be prepared by using a specific auxiliary agent through a simple means. The invention relates to a preparation method of a polyamide acid solution, which comprises the step of adding a combination of pectin and dimethyl adipate as an auxiliary agent in the reaction process of aromatic dianhydride and diamine.

The invention discloses continuous semi-solid pulping equipment and process. The continuous semi-solid pulping equipment comprises a forming mechanism; the conveying mechanism is mounted at the bottom of the forming mechanism; the melting mechanism is mounted at the top of the forming mechanism; the gas injection mechanism is mounted on the surface of the forming mechanism; and the air inlet end of the air exhaust mechanism communicates with the top of the forming mechanism. The invention aims to solve the technical problems that in the using process of existing semi-solid pulping equipment, gas injection is not uniform easily, slurry nucleation is not uniform due to the fact that gas injection is not uniform, the size of a crystal nucleus is not uniform, and finally liquidity difference is caused.

The invention relates to a method for preparing pressureless sintered silicon carbide ceramics through gel injection molding, and relates to the technical field of ceramics, the method comprises the following steps: adding an organic phase into water, stirring and dissolving to obtain an organic phase solution, adding a cross-linking agent, a dispersing agent, a defoaming agent and a suspending agent into the organic phase solution, and stirring to obtain a premixed solution; adding the powder into the premixed liquid, and stirring to obtain slurry; carrying out ball milling treatment on the slurry, carrying out defoaming treatment after ball milling, and carrying out vibration treatment during defoaming, so as to obtain defoamed slurry; adding a catalyst and an initiator into the defoamed slurry, stirring, pouring into a mold, forming to obtain a green body, drying the green body according to a drying system to obtain a dried green body, and performing pressureless sintering on the dried green body to obtain a silicon carbide ceramic product. The silicon carbide ceramic has the effects of improving the density, hardness and drying performance of the silicon carbide ceramic, the strength of a green body can be effectively improved, and the phenomena of cracking and deformation are reduced.

A catalytic cracking aid for improving the octane number of gasoline and a preparation method thereof. The catalytic cracking aid is composed of MFI structure molecular sieve, clay, pseudo-boehmite, phosphorus compound, binder, modified metal compound, etc. The catalytic cracking aid for improving the octane number of gasoline is obtained by the following preparation method: the MFI structure molecular sieve is pre-treated with alkali; before the pseudo-boehmite is acidified, the molecular sieve is added; after the acidified colloid is homogenized, it is directly spray-dried, roasted, and washed with water to obtain the catalytic cracking aid for improving the octane number of gasoline. The catalytic cracking aid disclosed in the present invention has a simple preparation process, a high solid content of the colloid slurry, and can be used in the catalytic cracking process to effectively improve the octane number of gasoline, with a small increase in liquefied gas and an increased propylene yield.

The invention belongs to the technical field of precision casting, and discloses light-cured silicon-based ceramic core slurry for investment casting as well as a preparation method and application of the light-cured silicon-based ceramic core slurry. The silicon-based ceramic core slurry is prepared from the following components in parts by weight: 70-85 parts of ceramic powder, 10-25 parts of photosensitive resin, 2-5 parts of a photoinitiator, 1-5 parts of a dispersing agent, 0.2-1.2 parts of an anti-settling agent and 0.01-0.2 part of a light absorber, wherein the total weight of the silicon-based ceramic core slurry is 100 parts; the ceramic powder is prepared from fused quartz powder, aluminum oxide ceramic powder and zirconium silicate ceramic powder according to the weight ratio of (50-90): (5-15): (2-10). The slurry is stable in flowing and settling performance, can be used for additive manufacturing and photocuring integrated forming of a silicon-based ceramic core with high strength, high precision, low sintering shrinkage rate and high porosity, and is of great significance for batch production of complex ceramic cores for the investment casting industry.

This invention discloses a retractable multi-material 3D printing head, which includes an extrusion structure, a first feeding structure, a second feeding structure, and a third feeding structure. By connecting the three feeding structures with one extrusion structure, the extrusion retraction problem in 3D printing of multiple materials is solved. The extrusion structure has three meshing screws, resulting in high mixing efficiency during slurry mixing. Simultaneously, each of the three feeding structures has a screw, allowing for better control of the amount of high-viscosity material added to the extrusion structure. Furthermore, the three screws inside the extrusion structure are specially designed irregular-shaped screws. While achieving conventional mixing, they not only better control the material extrusion amount but also work together with the screws in the feeding structures to achieve slurry retraction when printing high-viscosity materials, improving the forming effect and allowing for a wider solid content range in the formed ceramic slurry.

The present invention belongs to the technical field of functional sand materials, and specifically relates to an environmentally friendly antibacterial colored sand and a preparation method thereof. The colored sand comprises the following components by weight: 100-120 parts of quartz sand; 1-2 parts of pigment; 5-10 parts of modified polyacrylate emulsion; 3-5 parts of antibacterial agent; 1-2 parts of auxiliary agent; the present invention uses modified polyacrylate emulsion as a binder to achieve a good dyeing effect on quartz sand, and obtains colored sand with good mechanical stability, water resistance, acid resistance, alkali resistance and aging resistance. At the same time, the modified polyacrylate and the antibacterial agent can also synergistically enhance the antibacterial performance of the colored sand. The obtained colored sand has excellent antibacterial performance, and no non-volatile organic solvent is used in the preparation process of the colored sand, which has the advantages of being green and environmentally friendly.

The invention discloses a water-based single-component coating as well as a preparation method and application thereof, and belongs to the technical field of coatings. The water-based single-component coating provided by the invention is prepared from the following raw materials in parts by mass: 30 to 70 parts of water-based emulsion, 1 to 10 parts of cross-linking agent, 0.5 to 5 parts of dispersing agent, 1 to 20 parts of functional additive, 10 to 50 parts of pigment and filler, 0.001 to 1 part of functional pigment and 2 to 20 parts of water, the water-based emulsion comprises at least one of a water-based acrylic emulsion, a water-based polyurethane modified acrylic emulsion or a water-based polyurethane emulsion; the cross-linking agent is selected from a zirconium cross-linking agent which does not contain ammonium or amine; the dispersing agent comprises an acrylic polymer dispersing agent, a modified acrylic polymer dispersing agent or a combination of the acrylic polymer dispersing agent and the modified acrylic polymer dispersing agent. According to the invention, the zirconium cross-linking agent which does not contain ammonium or amine is adopted, can react with tannic acid permeated from wood or woodware, and can also react with residual carboxyl in a water-based emulsion system to form good cross-linking property, so that the sealing property of a paint film is greatly improved, and the problem of yellowing of the paint film is solved.