64results about How to "Improve surface hydrophobicity" patented technology

The invention relates to the technical field of wood corrosion prevention and corrosion resistance treatment, in particular to a preparation process of a coating for improving the antibacterial and corrosion-resistant performance of wood. In order to improve the antibacterial and corrosion-resistant capabilities of the prepared coating, a corrosion-resistant antibacterial agent is prepared and added into the raw materials of the coating, and quaternary ammonium salt, guanidyl and other group structures are introduced into the corrosion-resistant antibacterial agent, so that the antibacterial performance on microorganisms such as fungi is realized; the introduction of fluorine can effectively improve the hydrophobicity of a coating of the paint and reduce the influence of water vapor on antibacterial components in the coating, and the introduction of allyl can enable the corrosion-resistant antibacterial agent to react with butyl acrylate and other raw materials under the action of an initiator to achieve the cross-linking ability, so that the loss of the corrosion-resistant antibacterial agent is effectively avoided, and the service life of the coating is prolonged. The antibacterial activity is kept for a long time.

The invention provides an animal bifidobacterium subsp. Lactis HNU329 with uric acid reducing ability and application thereof, the animal bifidobacterium subsp. Lactis HNU329 is preserved in Guangdong Microbiological Culture Collection Center GDMCC, the preservation address is Institute of Microbiology, Guangdong Academy of Sciences, on 5th floor, No. 59, No. 100 Courtyard, Xianlie Middle Road, Guangzhou, the preservation date is April 22, 2024, the preservation number is GDMCC No: 64546, and the preservation number is CGMCC No: 64546. The preparation method comprises the following steps of: classifying and naming Bifidobacteria animata subsp.lactis, and carrying out classification and naming on the Bifidobacteria animata subsp.lactis. The strain has good capacity of degrading nucleoside and purine in vitro, also shows good uric acid reducing capacity and anti-inflammatory capacity in animal model evaluation, and can regulate intestinal flora of mice with hyperuricemia and improve symptoms of hyperuricemia. The traditional Chinese medicine composition has no toxic or side effect, high safety and wide application prospect.

According to the plastic-surface waterproof plywood and the production method thereof, the surface hydrophobicity of the plastic-surface waterproof plywood can be effectively improved, fluorine compounds are not used in raw materials, the super-hydrophobicity of the surface of the plastic-surface waterproof plywood can be effectively improved, and harm of the super-hydrophobic surface to human health can be effectively reduced; the preparation method comprises the following steps: carrying out in-situ growth of SiO2 with good internal interfacial force on the surface of Na-montmorillonite by using a sol-gel method to obtain MMT grafted SiO2, and carrying out modification treatment on MMT grafted SiO2 particles by using octadecyl trimethyl ammonium bromide and octadecyl trimethoxy silane to obtain modified MMT grafted SiO2; modified MMT grafted SiO2 is used as a reinforcing phase, polydimethylsiloxane modified epoxy resin is used as a matrix, and the super-hydrophobic coating is prepared. The hydrophobic MMT grafted SiO2 and the nano SiO2 growing on the surface of the Na-montmorillonite in situ form a synergistic effect, so that the hydrophobic performance is improved.

The invention relates to the technical field of conductive corrosion-resistant coatings for metal bipolar plates of hydrogen fuel cells, and discloses a conductive corrosion-resistant silver-doped titanium nitride coating for a metal bipolar plate as well as preparation and application of the conductive corrosion-resistant silver-doped titanium nitride coating. The conductive corrosion-resistant silver-doped titanium nitride coating for the metal bipolar plate is formed by sequentially stacking a pure Ti transition layer, a silver-doped titanium nitride coating and a pure titanium nitride covering layer. According to the conductive corrosion-resistant silver-doped titanium nitride coating for the metal bipolar plate, silver can be stably and uniformly distributed in the titanium nitride coating, a conductive path is formed, the contact resistance of the coating is reduced, the titanium nitride coating forms a compact structure, the corrosion resistance and the surface hydrophobicity of the titanium nitride coating are enhanced, and the service life of the coating is prolonged. The surface contact resistance can reach 4.18 m omega.cm < 2 >, the corrosion current density can reach 0.59 mu A.cm < 2 >, the corrosion potential can reach 0.08 V, and the water contact angle can reach 106.70 degrees.

The invention discloses polyurethane resin with a super-hydrophobic surface and a preparation method of the polyurethane resin, and belongs to the technical field of modified polyurethane materials. According to the invention, 2, 2 '-diallyl bisphenol A and a fluorine-containing thiol monomer react to introduce a fluorine-containing carbon chain, and then fluorinated modified 2, 2'-diallyl bisphenol A and tetramethoxysilane are used for treating nano zinc oxide, so that the content of active oxygen groups is reduced, a siloxane network structure is formed, the action with water molecules is reduced, and the hydrophobicity is improved. Secondly, the 2, 2 '-diallyl bisphenol A reacts with amino propyl isobutyl POSS to generate a benzoxazine structure, the POSS structure is introduced, the nano-size effect of the benzoxazine structure fills limited movement between molecular chains, a cage-shaped structure serves as a cross-linking point, the mechanical property is improved, and hydrophobicity is achieved. When polyurethane is prepared, 3, 3-bis (hydroxymethyl) azetidine and a benzoxazine structure are subjected to ring opening crosslinking, bonding, dispersity and stability of fluorinated modified nanoparticles and a matrix are enhanced, a complex network structure is formed, the surface roughness is increased, the water contact area is reduced, and super-hydrophobicity is achieved.

The invention discloses low-VOC (volatile organic compound) formula waterborne polyurethane industrial paint and a preparation method thereof, and relates to the field of paint. The waterborne polyurethane industrial paint with the low VOC formula is prepared from a waterborne polyurethane emulsion, fluoride-based nanoparticles, aliphatic isocyanate, a self-repairing polymer, carbon nanotubes, silane quaternary ammonium salt, a photosensitive curing agent, indium tin oxide, polydimethylsiloxane, zinc pyrithione, polyether siloxane and ammonium tripolyphosphate. According to the waterborne polyurethane industrial paint, the waterborne polyurethane emulsion, the self-repairing polymer, the carbon nanotubes, the indium tin oxide, the aliphatic isocyanate, the polyether siloxane and the like are combined, and the waterborne polyurethane industrial paint is low in VOC, excellent in wear resistance, weather resistance, static resistance and self-repairing performance, environmentally friendly, safe, wide in application prospect and suitable for popularization and application. And lasting protection and attractive effects can be provided for the industrial environment, and meanwhile the convenience of operation and maintenance is improved.

The invention discloses an activation method of silicon malachite minerals and a flotation method of high-alkalinity copper oxide ore or copper cobalt oxide ore, and belongs to the technical field of ore dressing. According to the method, crystalline phase transformation and site reconstruction are carried out on the surface of the silicon malachite, so that the surface of the silicon malachite is activated to enhance the flotation separation effect of the silicon malachite, and the problem that the silicon malachite is difficult to float and recover due to high surface hydrophilicity is solved. The method for activating the silicon malachite can also be used for flotation of complex high-alkalinity copper oxide (or copper-cobalt) ore, the high-alkalinity copper oxide (or copper-cobalt) ore is treated through the positive and negative combined flotation process, and the purposes that the recovery rate of copper and cobalt in the high-alkalinity copper oxide (or copper-cobalt) ore is larger than 90%, and the removal rate of calcium and magnesium is larger than 70% can be achieved. Compared with an existing copper oxide (copper-cobalt ore) flotation process, the method has the advantages of being simple in process, high in adaptability, small in toxicity, low in cost, high in economic benefit and easy to industrially popularize and apply.

The invention provides a preparation method and application of an ilmenite collecting agent, and the ilmenite collecting agent comprises, by mass concentration, 4%-12% of higher fatty acid, 15%-30% of a complexing agent, 5%-7.5% of sodium hydroxide, 1%-3% of a surfactant and 47.5%-75% of water. Wherein the higher fatty acid is modified oleic acid or a mixture of oleic acid and modified oleic acid; the modified oleic acid is 9-hydroxy octadecenoic acid or 10-hydroxy octadecenoic acid. The modified oleic acid is prepared from concentrated sulfuric acid, oleic acid and a sodium hydroxide solution. And the freezing point of the collecting agent is increased through the modified oleic acid, and the low-temperature resistance is improved. And when the pH is 2.5, the recovery rate of titanium dioxide reaches 60% or above after the collecting agent is added, and the acid resistance of the collecting agent is improved. The surfactant can stabilize foam, wet the mineral surface and reduce the mineral surface tension. The complexing agent can provide high selectivity and collecting capacity, and the technical problem that titanium concentrate and gangue minerals are difficult to efficiently separate through a conventional flotation reagent is solved. The preparation method is simple and easy for large-scale production.

The invention provides an EPDM (Ethylene-Propylene-Diene Monomer) rubber material and a preparation method and application thereof, and relates to the technical field of rubber materials. The EPDM rubber material is prepared from the following raw materials in parts by mass: 100 to 200 parts of raw EPDM rubber, 50 to 80 parts of composite modified white carbon black, 8 to 15 parts of a plasticizer, 0.5 to 2.0 parts of an anti-aging agent, 1.0 to 3.0 parts of a dispersing agent, 3.0 to 7.0 parts of a vulcanizing agent and 0.5 to 3.0 parts of an assistant cross-linking agent. The EPDM rubber material provided by the invention has good compatibility in a mixed solution of a refrigerant and refrigerating machine oil, has excellent mechanical properties, and can be applied to EPDM rubber products of an automobile air conditioning refrigeration system.

The invention discloses a hydrophobic wear-resistant high-light-transmittance film and a preparation method thereof. The hydrophobic wear-resistant high-light-transmittance film comprises a supporting layer and a functional layer which are stacked, the supporting layer comprises at least one of polycarbonate, polyether sulfone, thermoplastic polyurethane and a cycloolefin polymer; the functional layer comprises polyethylene glycol terephthalate and nano oligomeric silsesquioxane; the content of the nano oligomeric silsesquioxane accounts for 1%-5% of the total mass of the functional layer, and the nano oligomeric silsesquioxane comprises at least one of trisilanol isooctyl-POSS, trisilanol phenyl-POSS, octaphenyl-POSS and dodecaphenyl-POSS; the hydrophobic wear-resistant high-light-transmittance film is prepared through multi-layer co-extrusion, the light transmittance is 80% or above, and the water contact angle is larger than 100 degrees. The hydrophobic wear-resistant high-transparency film has excellent wear resistance, hydrophobicity, self-cleaning property and high transparency, and is especially suitable for the fields of consumer electronics, optical equipment, building materials, automobile industry and the like.

The invention belongs to the technical field of adsorption materials, and provides a preparation method of micro / narrow mesoporous high-hydrophobicity biochar, which comprises the following steps: (1) cleaning coco coir with deionized water, drying, crushing and sieving to obtain particles with the particle size of 0.425 mm; mixing the particles in the step (1) with phosphoric acid in a mass ratio of 1: 3, stirring for 0.5 hour, putting the obtained mixture into a drying oven, and drying at 110 DEG C for 2 hours; (2) pushing the dried mixture into a heating zone of a tubular furnace under the condition that the flow rate of carbon dioxide is 100 ml / min, and keeping the temperature at 800 DEG C for 2 hours to obtain biochar BC; and (3) adding the BC in the step (2) into 0.25 wt% of an aqueous solution of methyltrimethoxysilane, oscillating at 25 DEG C for 12 hours, filtering, and carrying out vacuum drying on the obtained slurry at 120 DEG C for 24 hours to obtain the micro-narrow mesoporous high-hydrophobicity biochar. The waste coco coir is used as the raw material, the process is simple, the cost is low, the recovery efficiency is high (can reach 84.36%), and the method has a good application prospect.

The invention relates to the technical field of biology, in particular to a method for stably improving the titer of horse radish peroxidase labeled streptavidin. According to the method provided by the invention, streptavidin with different histidine label lengths is designed, and then the streptavidin is coupled with horse radish peroxidase oxidized by sodium periodate, so that high-titer horse radish peroxidase labeled streptavidin can be obtained. The invention also discloses application of the enzyme-labeled conjugate in a magnetic particle platform streptavidin-biotin system, and experimental results prove that the method provided by the invention can be used for stably preparing the enzyme conjugate with high titer and low background, and is widely applied in the streptavidin-biotin system.

The invention discloses high-flexibility modified silicate as well as a preparation method and application thereof, and belongs to the technical field of coating industry. The high-flexibility modified silicate is prepared by reacting a polyamine polymer, epoxy silane and silicate and then carrying out surface hydrophobic modification through alkylsilane; wherein the epoxy group in the epoxy silane is connected with the amino group in the polyamine polymer through reaction, the silicon hydroxyl group in the epoxy silane is connected with the silicon hydroxyl group in the silicate through reaction, and the alkyl silane and the hydroxyl group on the surface of the silicate particle are subjected to hydrolytic condensation; the polyamine polymer is a primary amine or secondary amine polymer; the epoxy group silane is alkoxy group silane containing a glycidyl ether structure; and the alkyl silane is trialkoxy silane. The modified silicate is applied to a water-based inorganic coating, so that the flexibility and the stability of the inorganic silicate coating are improved, and the problem of poor compatibility of the inorganic silicate coating and a polymer emulsion is solved.

This invention discloses a method for preparing a novel ultra-high voltage high-performance composite insulating material, belonging to the field of composite insulating material preparation technology. The technical solution includes the following steps: S1, preparing a modified epoxy-silicone rubber composite resin matrix: 40-50 parts by weight of bisphenol A type epoxy resin (E-51) are placed in a reaction vessel, heated to 60-70℃, and continuously stirred at a stirring rate of 300-500 r / min. 10-15 parts by weight of terminal hydroxyl polysiloxane (molecular weight 5000-10000) are added, and the temperature is kept constant for 1.5-2 hours; subsequently, the system temperature is lowered to 40-50℃. The beneficial effects of this invention are: by setting up a resin matrix system of "terminated hydroxyl polysiloxane modified epoxy resin + nano-alumina / boron nitride composite reinforcement," the problem of imbalance between high voltage resistance and aging resistance in existing materials is solved. It exhibits significantly improved dielectric strength, greatly reduced dielectric loss, and excellent high and low temperature cycling performance, meeting the long-life operation requirements of ultra-high voltage equipment.

The invention provides a positive pole piece, a preparation method thereof and a battery. The positive pole piece comprises a positive current collector and a positive active material layer arranged on the positive current collector, the positive active material layer comprises at least one coating, the coating comprises a binder, and the binder comprises a first binding material and / or a second binding material; wherein the at least one coating comprises a first binding material, the first binding material having a hydrophobic group. According to the present invention, the first binding material having the hydrophobic group is adopted as the binder in the coating of the positive electrode plate, such that the surface hydrophobicity of the binder can be significantly improved, such that the overall hydrophobic performance of the positive electrode plate can be improved so as to effectively prolong the cycle life of the battery.

The utility model discloses a PVC (polyvinyl chloride) film with a thermal shrinkage function, which comprises a PVC base film, a printing layer, an adhesive layer, a protective layer and a polytetrafluoroethylene coating, and the PVC base film, the printing layer, the adhesive layer, the protective layer and the polytetrafluoroethylene coating are sequentially stacked; the PVC base film is a thermal shrinkage film; the printing layer is an ink layer with a certain color, shape and pattern; the adhesive is used for adhering the protective layer to one side of the PVC base film; the PVC base film is provided with a plurality of flow guide grooves, and the flow guide grooves are formed in the surface of the PVC base film in parallel. According to the PVC film with the heat shrinkage function, the surface hydrophobic performance of the PVC film is improved through the arrangement of the polytetrafluoroethylene coating, and meanwhile, the water removal function of the PVC film is further improved through the arrangement of the plurality of flow guide grooves.

The utility model belongs to the technical field of glass conductive display, and provides conductive glass and a display device.The conductive glass comprises a glass substrate, an ITO layer and a hydrophobic layer, the ITO layer is arranged on the glass substrate, the hydrophobic layer is arranged on the side, back to the glass substrate, of the ITO layer, and the hydrophobic layer at least has the waterproof characteristic and the organic solvent resisting characteristic. The utility model aims to solve the technical problem that the surface of conductive glass is easy to mildew in the prior art.

The invention discloses a preparation method of solar photo-thermal glass, and relates to the field of photo-thermal glass. When the solar photo-thermal glass is prepared, nano tin antimony oxide and dopamine react to obtain modified nano tin antimony oxide; the preparation method comprises the following steps: enabling 1, 4-butanediol, double-end hydroxyl polysiloxane, 3-amino propyl triethoxy silane and isophorone diisocyanate to react, so as to obtain modified waterborne polyurethane; uniformly mixing silicon dioxide, aluminum oxide, lithium oxide, zirconium dioxide, titanium dioxide and antimony trioxide, melting and annealing to obtain a glass substrate; the mixed emulsion is sprayed on a glass substrate, and then the glass substrate is soaked in a perfluorohexyl ethylene solution to obtain the solar photo-thermal glass. The prepared solar photo-thermal glass has excellent self-cleaning, self-repairing, impact resistance and aging resistance.

The invention relates to the technical field of organic polymer material modification and composite coating preservation, in particular to a natural antibacterial coating preservation material as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing an amphiphilic antibacterial chitosan derivative into a solvent A to obtain a water phase; adding essential oil into the water phase, homogenizing, and carrying out ultrasonic emulsification to obtain a Pickering emulsion; dissolving a film-forming material in a dispersing agent, and adding a plasticizer to obtain a film-forming base solution; and mixing the Pickering emulsion, the film-forming base solution and water, adding nano reinforced particles and a binder, homogenizing, and degassing to obtain the natural antibacterial coating fresh-keeping material. The antibacterial material is grafted in a natural polymer material chitosan molecular structure, meanwhile, the organic polymer material and the plant essential oil are compounded, the natural antibacterial coating fresh-keeping material with multiple antibacterial functions is constructed, the natural antibacterial coating fresh-keeping material is used for postharvest fresh keeping of tropical fruits, and the fresh-keeping effect is good.

The utility model discloses an aluminum honeycomb core composite board which comprises a composite board body, the composite board body is formed by combining an outer layer, a fireproof coating, a structure reinforcing layer, a first core layer, a first fireproof layer, a second fireproof layer, an inner layer, a waterproof layer, a second core layer and a bottom layer, the fireproof coating is fixedly connected to the lower surface of the outer layer, and the structure reinforcing layer is fixedly connected to the lower surface of the inner layer. Through the components, the composite board body is provided with multiple layers of fireproof and waterproof layers, ceramic treatment can be carried out at high temperature, a hard fireproof barrier is formed, double high temperature resistance can be achieved, flames and heat are prevented from permeating inwards, heat radiation can be reflected, and fire spreading can be delayed; the surface hydrophobicity of the composite board body can be high, the composite board body is resistant to rainwater corrosion, and the composite board body can still keep stable when exposed outdoors or in a humid environment for a long time.

The application provides an animal Bifidobacterium lactis HNU329 with the ability of reducing uric acid and an application thereof, the animal Bifidobacterium lactis HNU329 has been preserved in the Guangdong Microbial Culture Collection Center (GDMCC), the preservation address is the 5th floor of the 59th building of the courtyard, No. 100, Jiefang Road, Guangzhou, the preservation date is April 22, 2024, the preservation number is GDMCC No: 64546, and the classification and naming are Bifidobacterium animalis subsp. Lactis. The strain has good degradation abilities of nucleosides and purines in vitro, also shows good uric acid reducing ability and anti-inflammatory ability in animal model evaluation, and can regulate the intestinal flora of hyperuricemia mice and improve the symptoms of hyperuricemia. The strain is non-toxic and has no side effects, is safe, and has a wide application prospect.

The present invention discloses a high IPT halogen-free flame retardant reinforced PBT composite material and its preparation method and application. The composite material comprises the following components by mass percentage: 46.2-66.3% PBT resin, 5-8% halogen-free flame retardant, 5-8% silicon-based flame retardant toughening agent, 20-40% glass fiber, 0.3-0.5% antioxidant, and 0.3-0.5% lubricant. The composite material provided by the present invention has excellent resistance to inclined surface leakage tracking, can pass the IPT test up to 2KV, and has good impact performance (the simply supported beam unnotched impact can reach 55KJ / m 2 ) and flame retardant properties (flame retardant grade reaches 0.8mm V‑0 level), and can be used to prepare high-voltage energy storage connectors and / or photovoltaic connectors in new energy materials.

The invention belongs to the technical field of concrete, and discloses application of thermosetting plastic in preparation of hydrophobic concrete and a product. The hydrophobic concrete product is prepared from the following ingredients in parts by mass: 10 to 60 parts of thermosetting plastic powder, 20 to 30 parts of cement, 5 to 50 parts of quartz sand, 5 to 10 parts of fly ash and 25 to 35 parts of polyacrylamide-containing aqueous solution. The concentration of the polyacrylamide is 0 to 8000 ppm. According to the concrete product provided by the invention, the hydrophobic property of the concrete product is improved, the water absorption rate is reduced, the mechanical strength of cement is not greatly reduced, solid waste resources are effectively utilized, and the concrete product has a wide application prospect.

The invention discloses a preparation method of a super-hydrophobic microporous separation membrane, which comprises the following steps: introducing nanoparticles into a membrane casting solution system to form a multielement membrane casting solution system consisting of polymer / solvent / additive / nanoparticles, and preparing the separation membrane through a non-solvent induced phase separation process. The nanoparticles are particles subjected to hydrophobic modification by using perfluoro and polyfluoroalkyl compounds, and have through pore structures and rich hydroxyl groups on the surfaces. A hydrophobic fluorine-containing long chain modified on the surface of a hydrophobic / hydrophilic pore channel particle obviously enhances the compatibility and dispersity of the hydrophobic / hydrophilic pore channel particle in a PVDF casting membrane solution, and richer hydrophilic hydroxyl groups on the surface of the uniformly distributed particle promote the exchange of a water phase and a polymer-rich phase during phase separation; the through pore channel structure can also be used as a mass transfer channel of water coagulating bath during phase inversion and water vapor during membrane distillation, through the interaction, the membrane pore diameter is increased, the porosity is improved, meanwhile, polymer crystallization is induced to form a rough spherical particle structure, and a super-hydrophobic surface is constructed.

The invention relates to a drug coating capable of controllably releasing nitric oxide in vivo and in situ, a drug stent as well as a preparation method and application of the drug coating. The drug coating comprises a middle layer, a polymer layer and a drug layer, wherein the polymer layer is located between the middle layer and the medicine layer, the middle layer contains poly-p-xylylene, and the polymer layer contains a net-shaped copolymer capable of controllably releasing nitric oxide in a near-infrared light response mode. According to the invention, the reticular copolymer layer is subjected to in-situ polymerization on the surface of the middle layer through ultraviolet light initiation, and the polymer layer has a nitric oxide controllable release function with near-infrared light response and can be stably loaded on the surface of the middle layer, so that the phenomenon of nitric oxide burst release or coating shedding loss is avoided. According to the method, a stress concentration area of the stent is subjected to patterned etching by using fluorine-containing gas, and fluorine ions are introduced to increase the surface hydrophobicity of the material, so that the binding force of the drug coating of the stent is further improved.

The invention discloses a high-resilience and hydrophobic aromatic polyamide aerogel fiber as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out surface modification treatment on aromatic polyamide aerogel fibers by using a hydrophobic modifier to prepare modified aromatic polyamide aerogel fibers; the modified aromatic polyamide aerogel fiber is subjected to annealing treatment, and the high-resilience and hydrophobic aromatic polyamide aerogel fiber is prepared. The prepared high-resilience and hydrophobic aromatic polyamide aerogel fiber has excellent resilience, and the fiber can be recovered by 100% after deformation such as compression, bending and folding; according to the aromatic polyamide aerogel fiber, the surface hydrophobicity can be realized while the rebound resilience is realized, the aromatic polyamide aerogel fiber makes up the blank in the aromatic polyamide aerogel fiber research, and the practical application of the aromatic polyamide aerogel fiber in the fields of intelligent fabrics, wearable equipment, heat insulation and heat preservation, fiber flocculus and the like is promoted.

The present invention belongs to the technical field of deep processing of peanuts, and specifically relates to a method and application thereof for simultaneously improving the starch hydrolysis rate and protein quality in hot-pressed peanut meal. The specific method is that the peanut meal is pretreated first: water is added after ultrafine grinding, the pH is adjusted to 2, and constant temperature extraction is performed; after extraction, the pH is adjusted to 6, high temperature α-amylase is added, constant temperature oscillation is performed for enzymolysis, the pH is adjusted to 4.2-4.7, the enzyme is inactivated, and centrifugation is performed; protein extraction: water is added to the precipitate after centrifugation, the pH is adjusted to 8-10, and the precipitate is obtained by centrifugation; the precipitate is repeatedly extracted once, the supernatant is combined and the pH value is adjusted, and the precipitate is collected by centrifugation again; it is washed with deionized water, the pH is adjusted to 7.0-7.2, and the peanut meal protein is dried to obtain. The method of the present invention combines pretreatment with enzyme treatment technology; on the one hand, it can improve the degree of starch hydrolysis and increase the content of reducing sugars; on the other hand, the protein purity, emulsification, emulsification stability and the content of amino acids of peanut meal protein are improved; and the added value of the product is greatly improved.

The application provides an edible active coating for preventing dry consumption under an ultralow temperature condition and a preparation method, and belongs to the technical field of active packaging. The application combines double-layer coatings, inhibits free radical oxidation generated by freezing through an inner antioxidant, and effectively locks water and blocks external oxygen permeation through the synergistic effect of an outer high-barrier structure, thereby significantly improving the freezing preservation effect of food, and the raw materials are natural and safe, the preparation method is reasonable, and the application has good practical application value. The application solves the problems of poor effects of edible freezing protection coatings suitable for extremely cold environments in the prior art.

The utility model discloses a kind of color coating decorative aluminium profile, it is related to aluminium profile technical field, including aluminium profile assembly, aluminium profile assembly includes middle part support cylinder and reinforcing frame, the outside of middle part support cylinder is fixedly connected with first reinforcing rib, in the utility model, external load is first acted on reinforcing frame, pass through compression strip and is transferred to compression frame, and concentrated stress is dispersed as annular stress, support strip and connecting frame and support frame cooperate and resist the shear deformation of frame, radial load is obliquely conducted to middle part support cylinder through second reinforcing rib, utilize the torsional advantage of its cylindrical structure and disperse radial force, first reinforcing rib auxiliary converts radial force into annular tension, avoid middle part support cylinder partial compression instability, reinforcing pipe is installed in filling cavity, filling cavity is filled with anti-vibration material, improve axial compression resistance, form three-dimensional stress system, realize the layered transmission and dispersion of force.

This application provides a method for flotation separation of chalcopyrite and pyrite, relating to the field of mineral flotation. The method involves mixing and flotation of the minerals to be processed, including chalcopyrite and pyrite, with a chalcopyrite collector to obtain chalcopyrite concentrate and pyrite tailings. The general structural formula of the chalcopyrite collector is: [Formula omitted]. This chalcopyrite collector utilizes the high selective affinity of its propyne ester group for copper-active sites on the chalcopyrite surface and its inertness to iron sites on the pyrite surface, achieving precise identification and collection of chalcopyrite from the molecular structure of the reagent, significantly improving the grade and recovery rate of the copper concentrate. The R group is a hydrophobic group facing the pulp, significantly enhancing the surface hydrophobicity of the chalcopyrite particles, thereby enabling them to adhere to flotation bubbles and float.