15results about How to "Reduced release rate" patented technology

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.

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.

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.

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.

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 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.

This invention relates to the field of organic materials technology, specifically to a metal-organic framework (MOF), its preparation method, and its applications. The MOF is a CuBaTi MOF; wherein the MOF has a layered and porous structure; the CuBaTi MOF is modified with a surfactant; and the CuBaTi MOF is composited with mineral components. This MOF can effectively inhibit bacteria and adsorb ethylene. When made into an antibacterial film, it can not only preserve and inhibit bacteria in fruits and vegetables, delaying ripening and spoilage, but also possesses good mechanical properties. Furthermore, the preparation method of this MOF is simple, convenient, low-cost, and environmentally friendly, showing broad application prospects.

The present application relates to a kind of multi-effect herbaceous plant composite soothing repair composition and its preparation method, belong to the cosmetic technical field.The present application is by mixing glacial low deuterium water and superoxide dismutase to obtain A component, add D component (specific proportion nicotinamide mononucleotide (NMN) and modified hyaluronic acid microsphere) by the special interaction of the two with low deuterium water, form "triple synergistic carrier system", significantly improve the penetration and stability of active substance;B component is to mix hydroxyl asiaticoside and humectant.Meanwhile, the composite extract prepared by mixing the extract of radix stephaniae tetrandrae, the extract of gentiana and the extract of piper methysticum is C component, after mixing with A, B, D each component, low deuterium water can well carry the active ingredient in plant extract, hydroxyl asiaticoside and humectant in B component are mixed, can give full play to the moisturizing effect.The composition obtained after mixing A, B, C, D component has excellent soothing repair effect.

The invention discloses a polyvinylpyrrolidone grafted poly (dimethylaminoethyl methacrylate) chitosan nanofiber as well as a preparation method and application of the polyvinylpyrrolidone grafted poly (dimethylaminoethyl methacrylate) chitosan nanofiber. The preparation method comprises the following steps: modifying PVP and PDMAEMA on chitosan through an atom transfer radical polymerization method, dissolving in an acetic acid solution, and performing high-voltage electrostatic spinning; completely soaking the obtained nanofibers in a foaming solution, cleaning the foamed nanofibers after stabilization, then carrying out bubble removal treatment, freezing and freeze-drying to obtain porous nanofibers; and dissolving musk ketone in absolute ethyl alcohol, soaking the porous nanofiber in the musk ketone solution, and after the absolute ethyl alcohol is completely volatilized, obtaining the product. The invention provides an intelligent nanofiber dressing capable of actively sensing and responding to diabetes wound microenvironment change (pH). The dressing can realize on-demand release of drugs, synergistically manage wound exudate, remarkably improve blood circulation and antibacterial effects, and promote healing of diabetic wounds.

This invention relates to the field of food sauce technology, and more particularly to a wasabi and mushroom sauce and its preparation method. The wasabi and mushroom sauce is prepared from the following raw materials in parts by weight: 80-120 parts wasabi granules, 5-20 parts wasabi oil granules, 150-300 parts diced mushrooms, 30-60 parts edible oil, 10-30 parts sweetener, 8-12 parts edible salt, 4-10 parts thickener, and an appropriate amount of water. This invention combines wasabi granules with highly stable wasabi oil granules. The wasabi oil granules are obtained by solidifying a Pickering emulsion stabilized with sodium octenyl succinate starch / microcrystalline cellulose and hydrogenated palm oil, exhibiting excellent protection and sustained-release effects against isothiocyanates, etc. The added diced mushrooms enrich the chewy texture. The wasabi and mushroom sauce maintains a high ITC content after storage, with a long-lasting flavor and rich taste, combining the aroma of real wasabi, the umami of mushrooms, and a full-bodied chewy texture.

The application relates to a silver-coated copper particle, a preparation method thereof and application of the silver-coated copper particle in sintering paste, and belongs to the field of sintering materials. The application solves the problem of high sintering temperature of high-temperature solder in the prior art. The silver-coated copper particle is prepared by a multi-step chemical synthesis method, that is, silver-coated copper particle suspension is prepared first, and then a silver complex solution, a second chelating agent solution and a complexing agent solution are used to realize gradient structure evolution of the silver layer from compact to porous by controlling the release and reduction rate difference of silver ions, the surface of the silver-coated copper particle has a multi-stage pore structure, the contact resistance between particles can be effectively reduced, the sintering starting temperature can be effectively reduced, the poor oxidation performance of copper particles is solved, the silver consumption is reduced, the manufacturing cost is reduced, the ion migration path length and the electromigration life are increased, the silver-coated copper particle prepared by the application greatly meets the requirements of the electronic packaging field for new welding materials, and has remarkable social and economic benefits.

The application discloses a wide-temperature-range high-water-retention CO inhibiting fire extinguishing gel as well as a preparation and application thereof, and adopts beta-cyclodextrin to pre-adsorb halloysite nanotubes, then adds sodium carboxymethyl cellulose to perform interface coating, so as to obtain an interface-regulated halloysite nanotube dispersion liquid; soluble silver salt is added to introduce Ag + coordination / adsorption sites; the obtained dispersion liquid is mixed with a chitosan solution, then phytic acid is added, and a three-dimensional network structure is formed through electrostatic cross-linking and hydrogen bond cross-linking. The application solves the problem that the halloysite nanotubes are prone to aggregation through a sequential interface regulation strategy, utilizes the multi-point cross-linking of phytic acid and the phosphorus-based inhibition to construct a gel skeleton, and Ag + coordination / adsorption sites and a multi-scale limited structure are cooperated to achieve the adsorption and release delay of CO. The gel has wide-temperature-range thermal stability, high water-retention capacity and excellent CO inhibition performance, the preparation process is mild, and is suitable for various fire extinguishing scenes of coal mines.