62results about How to "Reduced release rate" patented technology

The invention relates to the technical field of adhesives, and discloses an antibacterial mildew-proof water-based adhesive and a preparation method thereof. The preparation method of the antibacterial and mildew-proof water-based adhesive comprises the following steps: reacting 2, 2-dimethylolpropionic acid with castor oil to obtain hyperbranched bio-based polyol; modifying the hyperbranched bio-based polyol by using a modifier to obtain modified bio-based polyol; the preparation method comprises the following steps: preparing a waterborne polyurethane dispersion liquid by taking modified bio-based polyol, a hybrid modified BN / MOF composite material and hexamethylene diisocyanate as raw materials and 1, 4-butanediol as a chain extender; the preparation method comprises the following steps: mixing a waterborne polyurethane dispersion liquid, a wetting agent, a defoaming agent, a thickening agent and water to obtain a component A; an aliphatic curing agent is used as a component B; during use, the component A and the component B are mixed and stirred. The antibacterial and mildewproof water-based adhesive disclosed by the invention has excellent adhesion performance, water resistance, self-repairing performance and lasting antibacterial and mildewproof performance.

The invention relates to the technical field of wire and cable manufacturing, in particular to a high-flexibility low-smoke fire-fighting power cable and a preparation method thereof. The cable sequentially comprises a cable core, a shielding layer and an outer sheath layer from inside to outside, the outer sheath layer is prepared from the following preparation raw materials: 60 to 65 parts of methyl vinyl silicone rubber, 12 to 15 parts of ethylene propylene diene monomer, 8 to 10 parts of linear low-density polyethylene, 5 to 6 parts of cross-linking agent, 20 to 22 parts of flame retardant, 6 to 8 parts of reinforced flame-retardant filler, 20 to 25 parts of modified heat-conducting filler, 1.2 to 1.5 parts of coupling agent, 1.3 to 1.5 parts of antioxidant, 3 to 3.5 parts of lubricant, 2 to 2.5 parts of vulcanizing agent and 0.6 to 0.8 part of accelerant. The outer sheath layer of the high-flexibility low-smoke fire-fighting power cable prepared by the invention has excellent mechanical strength, toughness, heat-conducting property, high temperature resistance and flame retardant property, so that the high-flexibility low-smoke fire-fighting power cable has higher reliability and safety in fire-fighting power supply occasions.

The invention belongs to the field of wastewater treatment. The invention provides a manganese-carbon composite controlled-release material as well as a preparation method and application thereof. The manganese-carbon composite controlled-release material comprises the following components: a manganese-rich mineral, a natural plant carbon source, a cementing material, aggregate, an additive and a foaming agent. The manganese-carbon composite controlled-release material disclosed by the invention can regulate and control the carbon release and manganese circulation process by virtue of the interaction between manganese and carbon, so that the electron transfer and mass transfer efficiency is remarkably improved, synergistic denitrification is realized, the overall denitrification efficiency is remarkably improved, and synchronous nitrogen and phosphorus removal and self-adaptive continuous denitrification are realized. The raw materials required for preparing the manganese-carbon composite controlled-release material are environment-friendly and low in price, the preparation process is simple, the preparation cost is low, and the manganese-carbon composite controlled-release material can be applied to filler in a submerged area of an artificial wetland, a biological filter and a biological retention system, and can be widely applied to application scenes such as tail water advanced treatment of a sewage treatment plant, rural agricultural sewage treatment and initial rainwater purification.

The invention belongs to the field of hydrogel preparation, and particularly relates to a preparation method of SA / CS / Ca < 2 + > dual-network hydrogel, an obtained product and application. The sodium alginate / chitosan / calcium ion (SA / CS / Ca < 2 + >) physical cross-linked double-network hydrogel is prepared through a semi-dissolution acidification sol-gel conversion method and an internal gel method, the hardness and chewiness of the hydrogel can be remarkably improved, and the elasticity and cohesiveness of the hydrogel can be improved; freeze-thaw stability research is carried out on the prepared SA / CS / Ca < 2 + > dual-network hydrogel, the influence of freezing temperature, thawing temperature, freezing and thawing cycle times and other conditions on properties such as gel structure, rheology, swelling rate, moisture distribution and the like is explored, and the result shows that when the freezing temperature is-80 DEG C and the thawing temperature is 4 DEG C, the gel subjected to one-time freezing and thawing cycle has good stability. Through detection and analysis, the hardness is relatively high, the elasticity and cohesiveness are also remarkably improved, the elastic modulus (G ') and the viscous modulus (G' ') of the gel are best, the swelling rate is relatively low, the free water content is relatively low, the bound water content is relatively high, and the gel structure is relatively stable.

The invention relates to the technical field of sustained and controlled release fertilizers, in particular to a soil-improving disease-resistant sustained and controlled release fertilizer and a preparation method thereof. The preparation method comprises the following steps: (1) preparation of the nutrient core: weighing an organic fertilizer, an ammonium nitrogen fertilizer, a phosphate fertilizer, a potash fertilizer, a biological regulator, chelated medium trace elements and modified attapulgite, uniformly mixing, and granulating to obtain the nutrient core; (2) covering an organic polymer coating layer: dissolving polylactic acid in a solvent to form a composite solution, spraying the composite solution on the surface of the nutrient core, and drying to obtain an organic polymer coated nutrient core; and (3) covering a mineral coating layer. The outermost layer of the soil-improving disease-resistant controlled-release fertilizer provided by the invention is the mineral coating layer, the mineral coating layer can be gradually disintegrated after being applied to soil, mineral components can improve the physical structure of the soil, regulate the acid-base property of the soil and increase the content of organic matters in the soil after entering the soil, and inorganic and organic nutrients are slowly released into the soil through the organic polymer coating layer; nutrient substances are continuously supplied, and common diseases of the corn are prevented and controlled.

The invention relates to a special soil-improving disease-resistant coated controlled-release fertilizer for wheat and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing a fertilizer particle core; step 2, preparing modified starch inner coating liquid; step 3, forming an inner coating film; and step 4, forming the biochar outer coating film. According to the special soil-improving disease-resistant coated controlled-release fertilizer for wheat, provided by the invention, fertilizer particles are of a multi-layer structure. The inner-layer coating is modified starch and is prepared by cross-linking a seaweed extract and starch, so that the resistance of wheat to a bad environment can be improved; the outer coating is modified biochar, so that the release rate of nutrients can be reduced, and the physicochemical properties and microenvironment of the soil can be improved.

The invention relates to a multifunctional magnesium alloy coating with high biocompatibility and a preparation method and application thereof. Comprising the following steps: (1) carrying out surface treatment on a magnesium alloy substrate; (2) micro-arc oxidation treatment; (3) after preparing a coating solution, carrying out double-sided ultrasonic atomization spraying; and (4) drying, soaking and cleaning. According to the preparation method, a micro-arc oxidation treatment technology and a double-sided ultrasonic atomization spraying technology are combined for the first time, pores and cracks of the MAO coating serve as binding sites, effective loads are provided for the silk fibroin / nano-hydroxyapatite particle coating, the MAO coating and the SF / nHAp coating are fully combined, and the composite coating is prepared. According to the coating, the MAO coating and the SF / nHAp coating are combined for the first time, the defect of rapid degradation when the magnesium alloy serves as an in-vivo implant is effectively overcome, the corrosion resistance of the magnesium alloy is remarkably improved, the release rate of hydrogen after implantation is reduced, and rising of the pH value around the implant is slowed down.

The invention discloses a slow-release temperature-controlled antifouling agent microsphere and a preparation method and application thereof, the method comprises the following steps: (1) mixing sodium alginate, copper pyrithione and a CaCl2 solution for reaction, freeze-drying, grinding and crushing to prepare intermediate product particles; and (2) mixing the intermediate product particles in the step (1) with a chitosan solution for reaction, then adding a glutaraldehyde solution for continuous reaction, and freeze-drying to obtain the antifouling agent microspheres. The sodium alginate and chitosan double-crosslinking preparation method adopted by the invention is novel, a double-layer drug-loading structure is constructed by virtue of the crosslinking effect of sodium alginate and calcium ions and the electrostatic interaction between anions and cations of sodium alginate and chitosan, and the thought is novel.

The invention relates to the technical field of organic fertilizers, and discloses a preparation method of a water-retaining slow-release bio-organic fertilizer, which is characterized in that water-retaining material powder is prepared from nano silicon dioxide, gamma-methacryloxypropyltrimethoxysilane, acrylic acid, attapulgite and the like as raw materials. The preparation method comprises the following steps: blending furfural residues and pig manure biogas residues into a mixed matrix according to a certain proportion, adding a microbial decomposition bacterium agent, nitrogen-fixing bacteria, phosphate solubilizing bacteria and the like into the mixed matrix, fermenting, crushing, drying and sieving to obtain bio-organic fertilizer particles. The water-retaining slow-release bio-organic fertilizer is obtained by taking the bentonite as an inner core carrier, taking a bentonite slow-release material as an inner coating film and taking water-retaining material powder as an outer coating film through a rotary drum coating process, and the prepared bio-organic fertilizer has relatively good water-retaining performance and slow-release performance.

The invention relates to the technical field of animal feed, in particular to pet food easy to digest and absorb and a preparation process thereof. The preparation process comprises the following steps: preparing a chitin nanofiber suspension; preparing a modified pork liver protein solution; preparing a digestion-aiding additive; the pet food easy to digest and absorb is prepared. Maleic anhydride is grafted on pork liver protein, so that the solubility of the pork liver protein in water is improved, the pork liver protein is easier to disperse, the pork liver protein is rich in high-quality protein, for pets, the excessive high-quality protein is not easy to absorb, but overnutrition occurs, and after the pork liver protein is grafted with maleic anhydride, the surface property of the protein is changed, so that the pet nutrition is improved. The modified pork liver protein solution is added, the biological absorptivity can be better improved, the content of protein in the modified pork liver protein solution can be reduced due to introduction of maleic anhydride, the content of protein in the prepared pet food is within the range capable of being absorbed by pets, and the prepared pet food is easy to digest and absorb.

The invention discloses a fertilizing method for effectively preventing a large amount of phosphorus nutrients in a phosphate fertilizer from being fixed by soil. The fertilizing method comprises the following steps: (1) selecting a forest land; (2) investigating soil environment types; (3) selecting types of phosphate fertilizers; (4) crushing and sieving a phosphate fertilizer; (5) packaging and producing the bag-controlled slow-release phosphate fertilizer; (6) digging fertilization pits; (7) preparing a coconut coir organic fertilizer mixture; (8) applying a bottom-layer coconut coir organic fertilizer mixture; (9) applying a bag-controlled slow-release phosphate fertilizer; (10) applying a coco coir organic fertilizer mixture on the top layer; and (11) covering with soil. By deeply digging holes and respectively applying upper and lower layers of coconut coir organic fertilizer mixtures to surround the bag-controlled slow-release phosphate fertilizer, the phosphate fertilizer is not in direct contact with soil, phosphorus nutrients are prevented from being fixed by reaction of some chemical elements in the soil, and meanwhile, the phosphorus nutrients are controlled to be continuously released for a long time through slow degradation and rotting of the packaging material, so that the slow-release effect of the bag-controlled slow-release phosphate fertilizer is improved. The release rate of phosphorus nutrients is obviously lower than that of a common compound fertilizer, and the released phosphorus nutrients are just absorbed by forest trees. The efficient utilization of phosphorus nutrients is realized.

The invention discloses a preparation method of a high-entropy Prussian blue analogue material CuCoNiCrMn-PBA (Prussian blue analogue) and a preparation method of the high-entropy Prussian blue analogue material. The preparation method comprises the following steps: dissolving a copper salt, a cobalt salt, a nickel salt, a chromium salt, a manganese salt and sodium citrate in deionized water, dropwise adding the solution and a sodium ferrocyanide salt solution into the deionized water at the same time, carrying out a co-precipitation reaction, adding ascorbic acid after co-precipitation is finished, stirring, and carrying out an Ostwald ripening process to obtain the high-entropy Prussian blue analogue material. When the material is used as a sodium ion battery positive electrode active material, the material has relatively high specific discharge capacity, relatively good cycling stability and excellent rate capability. The high-entropy Mn-based Prussian blue analogue material with multiple elements coordinated with N atoms is synthesized, the Jahn-Teller effect of the Mn element is inhibited while the capacity is provided by multiple transition metal elements, the framework structure is wide and stable, and the method has the advantages of being easy to operate, high in safety, high in yield and the like.

The invention discloses a mollusk attractant as well as a preparation method and application thereof in snail prevention and control, and belongs to the technical field of biopesticides, temperature-responsive microcrystalline cellulose particles are used as a main component of a coating premix, and an attractant base material containing active components, essence, amino acid, molasses and flour is coated, so that the mollusk attractant is obtained. The attractant has temperature responsiveness and can meet the field temperature of snails in spring and autumn high-incidence periods in agricultural production, the essence and the molasses are main components with an inducing function, snails can be better trapped, and the snails are not prone to loss due to the influence of the complex environment in a farmland; the temperature-responsive microcrystalline cellulose particles disclosed by the invention have amphipathy, the hydrophilicity can realize rapid spreading of the attractant in a farmland, and the hydrophobicity can realize that the attractant is not easily washed by water flow and rainwater in the farmland, so that the service life of the attractant is prolonged.

The application discloses a kind of biological nano preparations for heavy oil exploitation and preparation method thereof, it is related to oil exploitation technical field, and biological nano preparations for heavy oil exploitation is composed of the following mass percentage components: composite microbial fermentation liquor: 25~45%;Bio-surfactant: 6~12%;Nano metal oxide: 0.1~1.0%;Organic solvent: 10~20%;Slow-release carrier material: 2~8%;Stabilizer: 0.5~2%;The balance is water;Wherein, the composite microbial fermentation liquor is fermented by pseudomonas aeruginosa, bacillus subtilis and clostridium anaerobic bacillus under co-cultivation condition.The metabolic product of composite bacteria species used in the application contains a large amount of bio-surfactant, which can effectively reduce the oil-water interfacial tension to 10-3mN / m order of magnitude.Nano metal oxide produces local high temperature through quantum size effect, and promotes thick oil molecular chain to break.

The application discloses a coated controlled-release fertilizer based on magnetic response intervention nutrient precise control release and a preparation method thereof, and belongs to the technical field of controlled-release fertilizers.The coated controlled-release fertilizer is prepared by using a magnetic response type biological base coating material as a film material, and the magnetic response type biological base coating material raw material comprises, by weight, 30-40 parts of vegetable oil polyol, 15-25 parts of a curing agent, 1-5 parts of a covalent network crosslinking agent, 2-6 parts of a hydrophobic crosslinking agent and 5-20 parts of a magnetic substance.The application can artificially control the film shell pores to realize precise release of nutrients, greatly improve the nutrient utilization rate, and meanwhile, after the nutrient release is completed, the film shell remaining in the soil can be recycled by physical magnetic attraction, which is efficient and environmentally friendly.The application realizes magnetic response precise control of nutrient release by hydrophobic modification, crosslinking degree enhancement technology and introduction of magnetic substances, can artificially intervene in dynamic matching of crop fertilizer requirement rules with the help of an external magnetic field, realizes efficient recycling of the film shell, and eliminates soil plastic residue pollution from the source.

The application belongs to the field of biomedical materials and biomedical engineering technology, and discloses a natural hydrogel nanoparticle with mecobalamin sustained release and a preparation method and application thereof. The preparation method is as follows: calcium carbonate nanoparticles are dispersed in water, loaded with mecobalamin to obtain drug-loaded nanoparticles; boric acid is modified on silk fibroin to obtain boric acid-modified silk fibroin; purified peach gum is reacted with sodium periodate under light-proof conditions to obtain aldehyde-modified peach gum; the drug-loaded nanoparticle suspension is mixed with the aldehyde-modified peach gum, and then the boric acid-modified silk fibroin is added to obtain the natural hydrogel nanoparticle with mecobalamin sustained release. The hydrogel has excellent biocompatibility, drug sustained release, self-repair and other functions, and can be applied to nerve injury repair.

The invention belongs to the technical field of water body in-situ remediation, and relates to a method for improving the self-cleaning capacity of a water body by utilizing sustained-release particles. According to the method, slow-release particles wrapped by dialysis bags are added into a water body, the release rate of a carbon source is controlled, and the nitrogen and phosphorus removal capacity of native microorganisms is activated. Compared with the prior art, the slow-release particles are wrapped by the dialysis bag, so that microorganisms are prevented from being attached to the particles, the carbon source release rate is controlled, and the microbial community structure is directionally induced; and the method has the remarkable advantages of simplicity, continuous and stable effect, no secondary pollution, environment friendliness and the like.

The invention provides a Prussian blue positive electrode material and a preparation method thereof, a positive electrode plate, a sodium ion battery and electric equipment, and relates to the technical field of new energy. According to the preparation method of the Prussian blue positive electrode material provided by the invention, the Prussian blue material with high crystallinity, low crystal water and few defects is prepared by using a disodium tartrate one-step method, the method is simple, and the cost is low. The first solution and the second solution are alkalescent and are rich in a large amount of tartrate ions, the tartrate ions are rich in-OH, so that the first solution and the second solution can be used as strong complexing agents, each single tartrate ion can be complexed with a single transition metal ion to form a transition metal-tartrate complex, the release rate of transition metal is obviously reduced, and the transition metal-tartrate complex can be used for preparing the transition metal-tartrate complex. And by virtue of slow combination, the crystal can grow more sufficiently, so that the content of the ferrocyanide and the content of crystal water are reduced.

The present invention provides a ready-to-use mesoporous mineralized silk fibroin microsphere and a preparation method and application thereof. SilMA hydrogel microspheres are prepared by a photocrosslinking oil / water emulsification method, and then dry mesoporous mineralized SilMA microspheres (mSilMA for short) are prepared by combining biomimetic mineralization with a critical point drying method. Silk fibroin materials that are not easily degraded and have good biocompatibility are selected as carriers to solve the problems of easy loss and inability to retain BMP-2 for a long time; biomimetic mineralization forms a calcium phosphate coating to achieve efficient loading and controlled release of BMP-2; critical point drying forms a mesoporous structure, which is conducive to drug loading and release. mSilMA is applied to BMP-2 loading and controlled release, with high protein loading efficiency and long-term low-volume sustained release. The present invention has simple ingredients, mild preparation conditions, and is easy to obtain, providing a new approach for bone defect repair and has broad clinical application prospects.

This invention relates to the field of flame retardant preparation technology, and more particularly to a method for preparing an environmentally friendly and highly efficient flame-retardant polyolefin cable sheath material. The invention uses compounds containing primary amino and amide bonds and compounds containing phenyl and phosphoryl chloride groups as raw materials. The reaction is carried out at room temperature for 0.5-1 h, then heated to 45 °C for 3-4 h, and then to 65 °C for 5-6 h. Through a condensation reaction, a phosphoramide macromolecular flame retardant containing phenyl and amide bonds is obtained, with a yield as high as 80.5-95.6%. This flame retardant is added to polyolefin cable sheath material at a mass ratio of 25%, then compounded and extruded to obtain a halogen-free flame-retardant polyolefin cable sheath material. The flame retardant molecule prepared by this invention simultaneously contains phosphorus and nitrogen flame-retardant elements and amide bonds forming a char skeleton. During combustion, it can exert a phosphorus-nitrogen synergistic flame-retardant effect and promote the catalytic char formation of the matrix, which can significantly reduce the heat and toxic gas release of polyolefin cable sheath material during combustion, thereby providing protection for the lives of people in fire scenes.

A marine ship antifouling coating, including the following components in parts by weight: 40-60 parts of low surface energy fluorine-silicon modified epoxy resin; 10-30 parts of amino-modified nano titanium dioxide; 5-10 parts of amino-modified nano silicon dioxide; 5-15 parts of quaternary ammonium salt polymer capsules; 5-10 parts of organotin polymer microspheres; 1-5 parts of thiol-terminated hyperbranched macromolecules, low surface energy perfluoroalkyl and polysiloxane structures are introduced into the fluorine-silicon modified epoxy resin matrix, significantly reducing the coating surface energy, making it have excellent hydrophobicity and oleophobicity, and inhibiting the adhesion of marine pollutants. The introduction of amino-modified nano TiO2 and amino-modified SiO2 particles not only further reduces the surface energy, but also forms a micro-nano dual structure similar to the surface of a lotus leaf, blocking the contact between pollutants and the coating, and producing a physical antifouling effect; quaternary ammonium salt polymer capsules and organotin polymer microspheres can controllably release antibacterial agents and algaecides, respectively.

The invention relates to the technical field of fertilizers, and particularly discloses a method for increasing the utilization rate of a fertilizer by adding a synergist and a product. The method for increasing the utilization rate of the fertilizer by adding the synergist comprises the following steps: adding chondroitin sulfate into deionized water, adjusting the pH value of a system to 3-4, adding potassium permanganate, stirring for 1-4 hours, and adjusting the pH value of the system to 6-6.5 to obtain a prefabricated material a; adding polysuccinimide and lysine into N, N-dimethylformamide, stirring until a precipitate is completely separated out, collecting the precipitate, adding a nitrogen fertilizer, a phosphate fertilizer and a potash fertilizer into the precipitate, stirring for 10-30 minutes, spraying the prefabricated material a into the precipitate in a stirring state, continuously stirring for 1-2 hours, and performing vacuum drying to obtain a prefabricated material b; and stirring the prefabricated material b, a nitrification inhibitor, bentonite, zeolite powder, sodium alginate and compound trace elements for 1-2 hours, spraying a calcium chloride solution, granulating and drying.

The application belongs to the technical field of high polymer materials, and provides a persistent slow-release aromatic master particle and a preparation method thereof. The application obtains essence powder by mixing and aging aromatic substances and a slow-release agent; the essence powder, dry carrier resin, dry dispersing agent, plasticizer and compounded antioxidant are mixed, and low-temperature extrusion, cooling and granulation are sequentially performed to obtain the persistent slow-release aromatic master particle. The method adopts the slow-release agent to physically adsorb and anchor the liquid aromatic substances, and forms stable essence powder; during melt blending, the essence powder is wrapped by the carrier resin and fixed in the polymer network, and the release of the essence is delayed through the physical barrier effect, and the fragrance retention time is significantly prolonged. Meanwhile, the method adopts the low-temperature extrusion process to greatly reduce the heat loss and metamorphic risk of the aromatic substances in the processing process, ensures the purity of the fragrance type and the high retention rate of the effective components, and the obtained aromatic master particle has good processing adaptability, long-acting slow-release performance and safety.

The present invention relates to the field of animal feed technology, and in particular to a pet food that is easily digestible and absorbable and a preparation process thereof. The preparation process comprises the following steps: preparing a chitin nanofiber suspension; preparing a modified pig liver protein solution; preparing a digestive aid additive; and preparing a pet food that is easily digestible and absorbable. The present invention improves the solubility of pig liver protein in water and makes it easier to disperse by grafting maleic anhydride onto pig liver protein. Pig liver protein is rich in high-quality protein. For pets, excessive high-quality protein is not easy to absorb, but will result in overnutrition. After pig liver protein is grafted with maleic anhydride, the surface properties of the protein are changed, which can better improve the absorption rate of organisms. In addition, the introduction of maleic anhydride can reduce the protein content in the modified pig liver protein solution, so that the protein content in the prepared pet food is within the range that the pet can absorb, and the prepared pet food is easy to digest and absorb.

This invention discloses a pH-responsive MOF nanocomposite chromium-free tanning agent, its preparation method, and its application, belonging to the technical field of chromium-free tanning agents for leather. The method disclosed in this invention involves forming a ligand with a borate ester module through the dehydration condensation of 4-carboxyphenylboronic acid and tartaric acid, and then binding zirconium to the ligand via a solvothermal method to form a MOF tanning agent. Subsequently, zirconium tartrate is loaded onto the MOF, enabling controlled release of zirconium tartrate through a pH-responsive switch in the ligand. This improves the problem of uneven tanning caused by the rapid and strong binding of zirconium ions to collagen fibers, resulting in tanned leather with a shrinkage temperature exceeding 80 °C, thereby effectively improving the quality of zirconium-tanned leather products.

The invention relates to the technical field of soil conditioning, in particular to a soil nutrition conditioning agent for crop planting and a preparation method thereof, and the soil nutrition conditioning agent is prepared from the following raw materials in parts by weight: 20-40 parts of organic fermentation liquor, 1-3 parts of sodium glutamate, 30-50 parts of adsorptive filler, 10-15 parts of water-absorbent resin and 10-15 parts of adhesive; the preparation raw materials also comprise at least one of 0.01 to 2 parts by weight of indolebutyric acid, 0.01 to 2 parts by weight of naphthylacetic acid and 0.001 to 0.5 part by weight of S-abscisic acid; the adhesive is formed by mixing polylactic acid, sulfonated modified lignin, polyvinyl alcohol and a silane coupling agent according to the weight ratio of (10-15): (5-8): (3-5): (0.5-2); the soil nutrient regulator is prepared by matching a plurality of preparation raw materials and adopting a specific method, is safe and pollution-free, can improve the comprehensive properties of fertility enhancement, air permeability, water retention, pest and disease resistance and the like of soil, and promotes the growth and development of crops.

The present application relates to the technical field of functional fiber preparation, and specifically discloses a lavender and valerian modified plant-based fiber and a preparation method thereof. The modified plant-based fiber is prepared by the following method: lavender and valerian are washed, dried, and then crushed to obtain plant powder, and the plant powder is used as a raw material for extraction treatment to obtain a plant extract; nanographene sheets are added to a silane coupling agent hydrolyzate, and the plant extract is added for ultrasonic dispersion treatment, and then a sodium alginate coating liquid is added and fully stirred and mixed, and then dried and solidified to obtain a functional filler; a cellulose solution, a functional filler, epoxy soybean oil and a stearate are blended and wet-spun to obtain the fiber; the modified plant-based fiber prepared by the above preparation method can significantly improve the health care performance and antibacterial and anti-inflammatory performance of the fiber while ensuring excellent mechanical properties and thermal stability, and increase the moisture absorption and air permeability of the fiber.

This invention discloses a gradient corrosion metal release layer for flexible brain-computer interface electrode devices and its preparation method. The release layer consists of a silicon substrate, a release layer, and an electrode layer. The release layer is made of magnesium-based or iron-based alloy with gradient porosity in the thickness direction. The outer porous alloy layer has a porosity of 40%-70% and a pore size of 20-50 μm; the middle dense alloy layer has a porosity of 30%-50% and a pore size of 10-30 μm; the inner gradient transition layer has a porosity of 10%-30% and a thickness of 5 μm; the support layer is polylactic acid-glycolic acid copolymer (PLGA), and the electrode layer is prepared on the support layer; the buffer layer is a polyvinyl alcohol-chitosan composite hydrogel. This invention allows for controllable degradation and precise separation of the electrode 1-30 days after implantation. The release layer gradually fails in body fluids (such as cerebrospinal fluid) through electrochemical corrosion, significantly reducing mechanical damage to brain tissue during implantation, and the residual metal ion concentration is below the safety threshold.

The invention relates to biological glue and a biological wood and grass health board applying the biological glue, and relates to the technical field of biological glue, the biological glue comprises the following components by mass: 40-60 parts of composite polyol, 15-30 parts of hexamethylene diisocyanate, 5-15 parts of herbal microcapsules, 10-20 parts of organosilicon modified epoxy resin, 3-8 parts of a chain extender, 0.01-0.02 part of a catalyst, and 1-5 parts of an emulsifier. The biological glue prepared in the invention has good bonding performance, can effectively improve the bonding strength and antibacterial performance of the biological wood and grass health board, reduces the release amount of formaldehyde, and meets the requirements of users for high-quality functional products.

The present application relates to a kind of lime flavor aroma nanocapsule and its preparation method and application.The nanocapsule is with chitosan as wall material, with lime-flavored lime essential oil as core material, with sodium tripolyphosphate as crosslinking agent, and is prepared by ion gel method.The preparation method includes the following steps: chitosan, 1% acetic acid solution, lime essential oil are mixed in turn and stirred uniformly;Sodium tripolyphosphate is added to the mixed solution, and the suspension containing chitosan nanocapsule is obtained by stirring;Chitosan nanocapsule is collected by centrifugation, and finally lime-flavored aroma nanocapsule is obtained after freeze-drying.Compared with prior art, the present application solves the problem that lime-flavored aroma is easy to volatilize, oxidize or isomerize, thereby causing the product flavor intensity to decrease and the quality to deteriorate, and provides an effective steady-state technology for improving the flavor stability of lime-flavored and other fruit-flavored beverages.