2257results about How to "Small particle size" patented technology

The invention provides a nano enzyme as well as a preparation method and application thereof. The preparation method of the nano enzyme comprises the following steps: adding a stabilizer into a preheated solvent, and carrying out ultrasonic treatment; then adding ferric salt and cobalt salt, and adding alkali to adjust the pH value of the solution; then transferring the solution into a reaction kettle for reaction; and after the reaction, washing and separating to obtain the product. The obtained nano-enzyme is appropriate and uniform in particle size and good in dispersity, the enzyme activity is as high as 9.56 U / mg, and the application of the nano-enzyme in immunochromatography detection and plant canker prevention and treatment is widened. When the immunochromatography detection card prepared from the nano enzyme is used for detecting human hemoglobin, the detection limit can reach 0.05 ng / mL and is at least 10 times lower than that of a commercially available kit. When the nano-enzyme suspension is used for preventing and treating the kiwifruit canker, the nano-enzyme suspension with the concentration larger than or equal to 0.1 mg / mL is used, and the plant canker can be well controlled.

The invention relates to small-particle-size spherical hexagonal boron nitride nano-powder and a preparation method thereof. The method comprises the following steps: uniformly mixing boric acid and a nitrogen source, adding borax, uniformly mixing, and treating the obtained mixture at 75-85 DEG C or 250 DEG C for 2-5 hours; the obtained precursor is subjected to ball milling and drying or freeze drying, and then the obtained ball-milled precursor is heated to 900 DEG C in a high-pressure nitrogen atmosphere at the heating rate of 3-5 DEG C / min and subjected to heat treatment for 0.5-3 h; and putting the obtained product into water at 80-90 DEG C, stirring for 5-8 hours, and then performing post-treatment to obtain the small-particle-size spherical hexagonal boron nitride nano-powder. The prepared spherical boron nitride powder has the advantages of small particle size, high specific surface area and high sintering activity or the prepared spherical boron nitride powder has the advantages of small particle size and high crystallinity, and the preparation method is low in energy consumption, green and efficient.

The invention discloses a silicon-carbon composite material as well as a preparation method and application thereof, and relates to the technical field of battery negative electrode materials. The silicon-carbon composite material comprises active substance particles, and the active substance particles comprise a spherical porous carbon skeleton and nanometer silicon particles. The silicon-carbon composite material disclosed by the invention is high in sphericity degree, the poor pressure resistance caused by more edges and corners in the rolling process is avoided, and the problems that a solid electrolyte interface (SEI) film is continuously generated, the capacity is weakened and the circulation becomes poor due to low strength can be improved.

The invention relates to the technical field of battery materials, in particular to a graphite negative electrode material and a preparation method and application thereof. The graphite negative electrode material comprises graphite particles, the average length La of the graphite particles in the alpha-axis direction of microcrystals is larger than or equal to 40 nm, the average thickness Lc of the graphite particles in the c-axis direction of the microcrystals is larger than or equal to 25 nm, and the interlayer spacing d002 ranges from 0.336 nm to 0.338 nm, and the number parameter of the microcrystals contained in each single graphite particle is defined as N = D503 / (La2 * Lc); d50 is the median particle size of the graphite particles, the unit is [mu] m, and the numerical value of N is more than 0 and less than or equal to 0.04. The graphite negative electrode material disclosed by the embodiment of the invention comprises the graphite particles with stable microcrystalline structure, large microcrystalline size and large interlayer spacing, so that the expansion and stress distribution uniformity of the negative electrode material in the circulation process is improved, the diffusion of ions in the graphite particles is facilitated, the consumption of active lithium is reduced, and the service life of the negative electrode material is prolonged. And the dynamic and super-long cycle stability of the graphite negative electrode material is improved.

The invention discloses a magnesium-based cobalt precipitation agent and a preparation method and application thereof, and relates to the technical field of composite materials. The method comprises the following steps: performing calcination dissociation, enhanced leaching, carbonization separation, efficient pyrolysis, solid-liquid separation, drying and calcination on first magnesium ore to obtain active magnesium oxide; the second magnesium ore is subjected to calcination dissociation, hydration impurity removal, solid-liquid separation and low-temperature calcination, and then high-purity magnesium oxide is obtained; performing series-parallel modification on active magnesium oxide and high-purity magnesium oxide to obtain a magnesium-based cobalt precipitation agent; the mass ratio of the active magnesium oxide to the high-purity magnesium oxide is 1: (2-10), the modifier is quaternary ammonium salt organic powder, and the addition amount of the modifier is 0.02-1% of the total mass of the magnesium oxide. The magnesium-based cobalt precipitation agent prepared through the method is high in activity, has the advantages of being high in efficiency, low in price, low in unit consumption, environmentally friendly and the like in the aspect of nickel and cobalt precipitation through copper-cobalt ore and laterite-nickel ore wet smelting, and can greatly reduce the material cost in the nickel cobalt hydroxide production process.

The invention provides a lithium oxalate lithium supplement agent, a preparation method thereof and a lithium battery, and belongs to the technical field of lithium batteries. The lithium oxalate lithium supplement agent comprises lithium oxalate, a conductive agent and a catalyst, wherein the catalyst is nonmetal doped manganese dioxide. The lithium oxalate, the non-metal doped manganese dioxide and the conductive agent are mixed in water, and then spray drying is performed to obtain the lithium oxalate lithium supplement agent. The nonmetal doped manganese dioxide catalyst has a nano flower cluster shape and can be in close contact with lithium oxalate to form homogeneous microspheres, efficient solid-solid catalysis is promoted, the decomposition voltage of a lithium oxalate lithium supplement agent can be reduced to 4.25 V from 4.8 V, and meanwhile good integrity and wettability are kept.

The invention provides a modified lithium iron manganese phosphate positive electrode material and a preparation method thereof, a positive plate and a lithium ion battery. The modified lithium manganese iron phosphate positive electrode material comprises transition metal element-doped lithium manganese iron phosphate and a silicon hydroxyl-containing carbon coating layer, wherein the surface of the transition metal element-doped lithium manganese iron phosphate is coated with the silicon hydroxyl-containing carbon coating layer. And the transition metal element replaces the position of an iron element in the lithium manganese iron phosphate, so that the ion diffusion coefficient of the lithium manganese iron phosphate and the compaction density of the modified lithium manganese iron phosphate positive electrode material can be improved. The existence of the silicon hydroxyl-containing carbon coating layer is beneficial for improving the electronic conductivity and the structural stability of the lithium manganese iron phosphate positive electrode material, so that the manganese dissolution rate of the lithium manganese iron phosphate positive electrode material in the high-temperature cycle process of the battery is reduced. Therefore, the modified lithium manganese iron phosphate positive electrode material disclosed by the invention has relatively high ion diffusion coefficient, electronic conductivity, compaction density, rate capability, energy density and cycling stability.

The preparation method comprises the following steps: mixing polysaccharide gum with water, carrying out wet ultrafine grinding to obtain an ultrafine polysaccharide gum aqueous solution, and uniformly infiltrating the polysaccharide gum into cellulose or derivatives thereof by adopting high-shear mixing to form micelles; and promoting the micelles to form a honeycomb structure through microwave vacuum drying, and finally spraying ultrapure water atomized by high pressure to the honeycomb micelles and drying to obtain the hydrogel for absorbing grease. The water absorption capacity of the prepared hydrogel reaches 100 times or above, the storage modulus is 1350 Pa or above, grease can be efficiently absorbed, and the hydrogel has wide development prospects in the field of weight-reducing medicine or food.

The invention discloses a lithium iron phosphate carbon nanotube composite material and a preparation method thereof, and belongs to the technical field of battery materials. The polydopamine is used as a carbon source to coat the lithium iron phosphate, so that the direct contact between the lithium iron phosphate and the electrolyte is avoided; meanwhile, the compatibility of the carbon nanotube composite material and the lithium iron phosphate is enhanced due to the strong adhesion, so that the carbon nanotube composite material is favorably adsorbed on the lithium iron phosphate to be sintered; a carbon coating layer formed by polydopamine and the carbon nanotubes are beneficial to permeation of an electrolyte and exposure of surface active sites, and metal ions are introduced into the carbon nanotubes of the carbon nanotube composite material, so that the electrochemical performance of the material is improved, and meanwhile, the carbon nanotubes are supported; the condition that the cyclicity of the material is reduced due to collapse of the carbon nano tube in the reaction process is prevented; cobalt is introduced outside the carbon nano tube, so that the energy density of the battery can be improved, the structures of the carbon nano tube and the positive electrode material can be stabilized, and the degradation of the material is reduced.

The invention relates to the technical field of lithium ion batteries, in particular to a positive electrode active material, a preparation method, a lithium ion battery and electric equipment. The positive electrode active material comprises a modified lithium iron manganese phosphate composite material, the modified lithium iron manganese phosphate composite material comprises a main body material, the main body material comprises a lithium iron phosphate material and a lithium iron manganese phosphate material, and the volume average particle size of the lithium iron phosphate material is greater than that of the lithium iron manganese phosphate material; and the lithium manganese iron phosphate material and the lithium iron phosphate material are partially fused, so that the lithium manganese iron phosphate material grows on the surface of the lithium iron phosphate material in situ. Therefore, the lithium ion battery prepared from the modified lithium manganese iron phosphate composite material not only has better electrochemical performance, but also can reduce the difficulty of production and processing of the lithium ion battery.

The invention discloses an application of a microporous and mesoporous metal organic framework microsphere material in organic dye and heavy metal wastewater. According to the invention, mesoporous spheres formed by self-assembly of a block copolymer are used as objects, and regular and highly dense mesoporous micron-sized particles of a self-assembled amphiphilic block copolymer (PS-b-PAA) in a selective solvent mixture are used as a template; uiO-66-NH2 and ZIF-67 micron-sized microspheres which are formed by mutual growth of metal-organic framework nanocrystals and have two pore diameters of micropores and mesopores at the same time are produced, and larger carrying capacity is obtained, so that adsorption separation is more efficiently realized. The adsorbent is respectively used for dye adsorption and heavy metal ion adsorption, and the adsorption performance and mechanism of the adsorbent are explored. The metal organic framework microspheres with both micropores and mesopores are used as an adsorbent, and a simpler, more convenient and novel method is provided for adsorption.

The invention relates to the technical field of dispersing agents for ceramics, and discloses a preparation method of a dispersing agent for ceramics, and the novel dispersing agent for ceramics is prepared by taking methoxypolyethylene glycol, bromoacetyl bromide, 4-hydroxyphthalic anhydride, 2, 4, 6-diethanolamine amino-1, 3, 5-s-triazine and the like as raw materials. The polyether polyol contains a plurality of carboxyl groups, has strong interaction with the surface of ceramic powder such as aluminum oxide, has a star-shaped multi-arm polyether molecular chain, can well coat the aluminum oxide powder, can effectively inhibit the growth of crystal nucleus particle size of the aluminum oxide powder, reduces the particle size of the aluminum oxide, and avoids agglomeration and sedimentation of the aluminum oxide; the modified aluminum oxide ceramic powder has good activation degree in solvents such as water, ethanol, dichloromethane or N, N-dimethylformamide and the like, is lower in settling volume and shows excellent dispersing performance.

The invention belongs to the technical field of energy and petrochemical engineering catalysts, and particularly discloses a preparation method and application of a copper-zinc-aluminum spinel solid solution catalyst. The Cu-Zn-Al spinel solid solution catalyst is prepared by ball-milling copper, zinc and aluminum precursors and then roasting at 800-1200 DEG C in the air atmosphere, and the preparation method is simple, does not need a large amount of solvent, is less in wastewater and avoids the influence of other impurity ions. The Cu-Zn-Al spinel solid solution catalyst prepared by the invention is used for methanol reforming hydrogen production reaction, the methanol conversion rate is as high as 95.5%, the H2 selectivity in the product is 74.8%, and the CO selectivity is 0.76%, so that the Cu-Zn-Al spinel solid solution catalyst has high activity, high selectivity and good reaction stability.

The invention provides the nano-liposome for embedding the cod bone peptide calcium chelate, so that the digestion stability of the cod bone peptide calcium chelate is enhanced, targeted release of Ca < 2 + > in small intestines is facilitated, and the bioavailability of the cod bone peptide calcium chelate is further improved. The amino acid sequence of the cod bone calcium chelating active peptide is SSGPGGERGPp. The nano-liposome disclosed by the invention can ensure the structural integrity in the stomach to protect the cod bone peptide calcium chelate from being damaged, and can release the peptide calcium chelate in the intestinal digestion process, so that the digestion stability of the cod bone peptide calcium chelate is improved, and the targeted delivery of the cod bone peptide calcium chelate is realized.

The invention provides a method for preparing battery-grade lithium iron manganese phosphate from lithium iron phosphate lithium extraction slag and application of the battery-grade lithium iron manganese phosphate. The preparation method comprises the following steps: carrying out acid leaching on the ferrophosphorus slag to obtain a leaching solution and leaching slag; adding a manganese salt and an iron salt into the leachate to supplement manganese and iron, and then mixing with a precipitant solution and a complexing agent solution to carry out coprecipitation reaction to obtain a ferromanganese phosphate precursor; carrying out hydrothermal reaction on the ferromanganese phosphate precursor and a lithium source to obtain a lithium ferromanganese phosphate precursor; and sintering the lithium manganese iron phosphate precursor to obtain the battery grade lithium manganese iron phosphate, wherein acid adopted in the acid leaching process comprises phosphoric acid. According to the preparation method provided by the invention, the recovery rate of phosphorus and iron in the waste residues can reach 96% or above, the obtained lithium manganese iron phosphate material is high in purity, small in particle size and uniform in distribution, and the electrical property can reach the level of battery-grade lithium manganese iron phosphate; in addition, the preparation method is short in technological process, high in production efficiency and suitable for large-scale production.

The invention relates to the technical field of batteries, in particular to a porous carbon material, a silicon-carbon composite material and application of the porous carbon material and the silicon-carbon composite material. According to the porous carbon material, the micropore rate phi, the pore volume Pv and the compressive strength Cs meet the relational expression that (Cs * phi) / Pv is larger than or equal to 550 and smaller than or equal to 1050, and the micropore rate phi gt; and the compressive strength Cs is 600 to 850 MPa. The porous carbon material provided by the invention has high microporosity, and the microporosity phi, the pore volume Pv and the compressive strength Cs of the porous carbon material meet the relation that (Cs.phi) / Pv is more than or equal to 550 and less than or equal to 1050, so that the particle size of silicon particles can be effectively reduced, the absolute expansion of silicon in a carbon matrix is reduced, and the first effect and the cycling stability of the silicon-carbon composite material are improved.

The invention provides high-dispersity superfine copper powder and a preparation method thereof, and belongs to the technical field of metal materials. The preparation method comprises the following steps: mixing a copper-containing solution, an alkali-containing solution and a reducing agent solution, and reacting to obtain a cuprous oxide precursor; and mixing the cuprous oxide precursor solution, the dispersing agent solution and the reducing agent solution, and reacting to obtain the superfine copper powder. According to the method, a traditional one-step liquid phase synthesis method for the superfine copper powder is abandoned, a two-step method is creatively adopted for preparing the superfine copper powder, and the contradiction between the size of copper particles and the technological capacity is solved. According to the preparation method, the copper particles with smaller sizes can be prepared on the premise that high unit volume productivity is kept, and the prepared copper particles are smooth in surface and uniform in size.

The invention relates to the technical field of nano material preparation, and provides a molybdenum powder preparation method and molybdenum powder.The molybdenum powder preparation method comprises the steps that original molybdenum trioxide is subjected to thermal shock treatment, and treated molybdenum trioxide is obtained; the defect of the treated molybdenum trioxide is higher than that of the original molybdenum trioxide; adding the treated molybdenum trioxide and a water-soluble carbon source into a solvent, and carrying out ultrasonic dispersion and ball milling treatment to obtain mixed slurry; dehydrating and drying the mixed slurry to obtain precursor powder of organic carbon coated molybdenum trioxide; performing inert atmosphere reduction treatment on the precursor powder to obtain molybdenum dioxide; carrying out gas reduction deoxidation treatment on the molybdenum dioxide to obtain molybdenum powder; and the particle size of the molybdenum powder is nanoscale. The method disclosed by the invention can be used for preparing the nano molybdenum powder with narrow particle size distribution.

The invention relates to the technical field of heat treatment of neodymium-iron-boron permanent magnet materials, in particular to a uniform heat treatment process of a neodymium-iron-boron permanent magnet material. The invention discloses a uniform heat treatment process for a neodymium iron boron permanent magnet material. The uniform heat treatment process comprises the following steps: preparing fluorinated carbon nanotubes; preparing permanent magnet powder containing the fluorinated carbon nanotubes; ultrasonic preheating of the permanent magnet powder; and performing uniform heat treatment on the permanent magnet. In the tempering heat treatment process of the sintered magnetic block, the tempering furnace is filled with the plasmas with good heat conductivity, the magnetic field generated by the magnetic block is offset through the magnetic field generation device, the influence of the magnetic field on distribution of the plasmas is prevented, and therefore the plasmas are evenly distributed in the tempering furnace; and when part of the heating burners are started to carry out low-temperature tempering treatment on the magnetic block, heat can be uniformly distributed in the tempering furnace through plasmas, so that the magnetic block is uniformly heated, and the coercivity of the neodymium iron boron permanent magnet material is better improved.

The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a platinum-carbon catalyst with an adjustable size, which comprises the following steps: uniformly stirring and mixing an ethylene glycol solution containing H2O and an ethylene glycol solution containing potassium chloroplatinate, heating and reacting under the protection of inert gas, and cooling to room temperature after the reaction is completed; and adding a carbon carrier material into the reaction liquid, uniformly stirring, washing with water, and drying to obtain the platinum-carbon catalyst. In the invention, the polarity, viscosity and dielectric constant of an ethylene glycol solution can be changed by adding water into ethylene glycol, and the change of the properties can influence the reduction kinetics of metal ions and the nucleation growth process of particles. Therefore, under the action of the ethylene glycol reducing agent, the effect of regulating and controlling the particle size of the metal particles can be achieved only by relying on water, the method has the advantages of being simple and green and has wide application prospects, and the prepared platinum-carbon metal nano-catalyst is clean and free of pollution.

The invention belongs to the field of food processing, particularly relates to a carotenoid oil suspension and a preparation method thereof, and more particularly relates to a high-content and low-viscosity carotenoid oil suspension and a preparation method thereof. A dispersion medium of the carotenoid oil suspension provided by the invention comprises an oily substance, and the carotenoid oil suspension contains two parts of carotenoid particles shown as (i) and (ii): (i) carotenoid particles with Dv (90) greater than or equal to 0.01 mu m and less than or equal to 0.5 mu m; (ii) carotenoid particles having a Dv (90) of 3 [mu] m or more and 20 [mu] m or less; the mass ratio of the (i) part to the (ii) part is 1: (1-5). According to the invention, the particle size distribution of carotenoid particles is controlled by utilizing a homogenizing process, so that the requirement of low viscosity of the oil suspension can be met, and meanwhile, high content of effective components can be kept.

The invention discloses an ultrasonic molecular probe. The ultrasonic molecular probe comprises a targeted contrast agent and siRNA of fibronectin, wherein the targeted contrast agent and the siRNA are connected through G0-C14; the targeted contrast agent comprises gas vesicles covalently linked with annular polypeptide, and the annular polypeptide targets an atherosclerotic plaque region. The cyclic polypeptide can be combined with the outer structural domain B of fibronectin with high specificity, and the atherosclerotic plaque extracellular matrix is rich in the outer structural domain B of the fibronectin, so that enough targeted ultrasonic contrast agent can be quickly combined in the plaque region to generate strong signal enhancement in ultrasonic imaging, and on the basis, the targeted ultrasonic contrast agent can be quickly combined with the plaque region to generate strong signal enhancement in ultrasonic imaging. The ultrasonic molecular probe releases siRNA for atherosclerotic plaque treatment, and atherosclerotic plaque diagnosis and treatment integration is achieved. The invention further discloses a preparation method of the ultrasonic molecular probe and application of the ultrasonic molecular probe in preparation of atherosclerotic plaque diagnostic agents, drugs and drug delivery agents.

The invention discloses a preparation method of a prefabricated autoclaved aerated concrete slab made of a solid-waste-based sulfur-aluminum-iron binding material. The preparation method comprises the following steps: preparing dry substances of the material; carrying out solid waste pretreatment by a mechanical ball milling method; adding ardealite, aluminum ash, coal gangue, fly ash, steel slag and carbide slag at the moment; calcining and directionally mineralizing after pretreatment; secondarily grinding the intermediate material; adding the secondarily ground intermediate material, cement, aluminum powder and water, and foaming; after the slurry is thickened, multi-frequency vibration is carried out in the pouring process; after pouring is completed, multi-temperature curing is conducted; after curing is completed, the highly-doped solid waste-based functional prefabricated autoclaved aerated concrete slab product is obtained. According to the autoclaved aerated concrete slab, dependence on natural resources is effectively reduced, meanwhile, carbon dioxide emission in the production process is reduced, and meanwhile, the compressive strength and the breaking strength of the autoclaved aerated concrete slab are improved; the service life of the material is prolonged; the preparation process is simplified, and the production difficulty and cost are reduced.

The invention relates to the technical field of composite boards, and discloses a scratch-resistant PE composite board and a preparation method thereof. The PE composite board is prepared by taking high-molecular-weight polyethylene, low-density polyethylene and medium-density polyethylene as main raw materials, adding functional aids such as a reinforcing filler, a modified polyurethane elastomer and molybdenum disulfide, and carrying out processes such as banburying, hot press molding and cold press molding. Due to the addition of the reinforcing filler, the mechanical property and the surface hardness of the matrix are improved, and the scratch resistance is further improved; the modified polyurethane elastomer is introduced into the matrix as a toughening component, so that not only is the toughness of the matrix improved, but also the scratch resistance of the matrix is improved; due to introduction of molybdenum disulfide, the unique layered structure of molybdenum disulfide can be utilized, the friction coefficient of the matrix is reduced, and then the scratch resistance of the matrix is improved.

The invention belongs to the technical field of new materials, and discloses a method for preparing indium cerium oxide powder based on an electrochemical method, which comprises the following steps: by taking indium cerium alloy as an anode and an inert electrode as a cathode, carrying out electrolytic reaction in an alkaline electrolyte to generate an indium cerium hydroxide precipitate; the hydroxide precipitate is pyrolyzed after being washed, and indium cerium oxide powder is generated. According to the method, an electrolytic method is adopted for preparing mud of indium cerium hydroxide, the grain size of the mud is very small, in the precipitation reaction, the indium cerium hydroxide is evenly mixed, then pyrolysis is conducted, and the indium cerium oxide powder with good uniformity can be obtained. Meanwhile, the invention further provides the cerium indium oxide powder, the target material and the transparent conductive oxide film which are prepared on the basis of the method.

The invention discloses a master batch with a food fresh-keeping function. The master batch comprises the following components: 40-80 parts of PE resin; 5 to 30 parts of a nano composite antibacterial agent; 0.1 to 5 parts of a surfactant; 2-10 parts of a polyolefin elastomer; 5-25 parts of an organic gas adsorption material; 5-20 parts of a microporous modified atmosphere material; 1-25 parts of an antifogging agent; 0.1 to 10 parts of a lubricant; 0.1-5 parts of a dispersant; 0.1 to 1 part of an antioxidant; 0.1 to 3 parts of absolute ethyl alcohol; and 80 to 300 parts of ultrapure water. The master batch with the food fresh-keeping function has a broad-spectrum antibacterial effect, can reduce the rotting rate, the weight loss rate and the loss rate of fruits and vegetables in the production circulation link, adsorbs organic gas generated by respiration of the fruits and the vegetables, spontaneously adjusts the gas concentration content, and prolongs the fresh-keeping time and the shelf life of the fruits and the vegetables.

The invention relates to the technical field of defoaming agents, and discloses a modified organic silicon defoaming agent and a preparation method thereof.The modified organic silicon defoaming agent takes hydrogen-containing silicone oil as a base material, polyether modified carboxymethyl cellulose and modified white carbon black are used for modifying the base material to obtain the modified organic silicon defoaming agent, and after the white carbon black is modified, the modified organic silicon defoaming agent is prepared. According to the present invention, the polyether modified organic silicon is uniformly and stably distributed in the system so as to improve the defoaming efficiency, the carboxymethyl cellulose has characteristics of excellent thickening property, excellent film forming property and excellent stability, can improve the consistency of the organic silicon defoaming agent, can help to form the stable film layer, can easily adhere and disperse the active component of the defoaming agent, and can improve the defoaming effect; the surface property of the modified organic silicon is improved, the modified organic silicon has better hydrophilicity and wettability, the structural stability of the silicone oil is improved, all the components have a synergistic effect, and the prepared modified organic silicon has excellent defoaming and foam inhibiting effects, meanwhile, the dispersity is good, the heat resistance and stability are improved, and the application range is wide.

The invention discloses an aquaculture denitrification microcapsule as well as a preparation method and application thereof, and relates to the technical field of aquaculture and biology. The lactobacillus casei provided by the invention can secrete acid metabolites, and the acid metabolites can inhibit pathogenic vibrio, so that the occurrence of diseases in aquaculture can be reduced. Lactobacillus casei has the efficacy of efficiently degrading ammonia nitrogen and nitrite nitrogen in the aquaculture environment, and can continuously realize efficient cleaning of the aquaculture environment. In addition, the invention also provides a denitrification microcapsule which creates a more favorable microenvironment for the efficient denitrification strain, so that the repeated denitrification performance is more stably exerted, and the denitrification microcapsule can be repeatedly utilized.

The invention relates to a silk fibroin emulsion containing oryzanol and application of the silk fibroin emulsion, and belongs to the technical field of nano-emulsions. The silk fibroin emulsion disclosed by the invention is prepared from the following components in parts by mass: 575 to 635 parts of water, 350 to 400 parts of camellia oil, 12 to 15 parts of silk fibroin and 3 to 10 parts of oryzanol. The particle size of the silk fibroin emulsion is within 320.74 nm. According to the invention, proper addition of oryzanol can reduce the particle size of the emulsion and improve the stability of the silk fibroin emulsion, so that the application value of the silk fibroin emulsion is improved, the performance is improved after the emulsion is added into many cosmetics, and a wider space is opened up for the application of the silk fibroin emulsion.

The invention relates to the technical field of raw material crushing, in particular to a raw material crushing device for preparing a fruit preservative. Comprising a base which is provided with a driving module; the outer cylinder is rotationally connected to the base, and a lining plate layer is fixedly connected to the inner side of the outer cylinder; the multiple fixing shells are fixedly connected to the outer cylinder and fixedly connected with the lining plate layer, the fixing shells are slidably connected with baffles, the baffles are in ball joint with spline rods, and the spline rods are in threaded connection with spiral sleeves; the sliding piece is fixedly connected to the spiral sleeve; and the limiting ring is fixedly connected to the base and is in sliding connection with the sliding piece. By changing the moving distance of the baffle and increasing the contact area of the baffle and a mixture, the probability that materials collide with a crushing medium is increased, the material crushing force is increased, the reduction of the particle size of the materials is accelerated, and the effect of controlling the particle size of the crushed materials is achieved.