70results about How to "Extended release period" patented technology

There is disclosed a fertilizer composition comprising a water-insoluble slow-release reacted nitrogen fertilizer and an effective amount of a water-soluble, non-aromatic poly(amino acid) of the group poly(aspartic acid), poly(glutamic acid), poly(glycine), poly(lysine) a copolymer of cystein and glutamic acid and a terpolymer of cystein and glutamic acid and aspartic acid, wherein the poly(amino acid) has a molecular size larger than that which can be absorbed by a plant. A method of making and using the fertilizer composition is also disclosed.

The invention discloses a special compound microbial fertilizer for rice. The fertilizer is prepared from the following raw materials in parts by weight: 20-32 parts of a microbial agent, 5-15 parts of charcoal, 20-30 parts of a nitrogen phosphorus potassium fertilizer, 1-5 parts of trace elements, 3-10 parts of nano-titanium dioxide, 5-15 parts of traditional Chinese medicine composition, 12-20 parts of a silicon-calcium-magnesium fertilizer and 2-5 parts of bamboo vinegar. The compound microbial fertilizer is reasonably prepared according to nutritional requirement of rice, can be used for improving the physical and chemical property and granular structure of soil, improving the fertilizer and moisture retaining capabilities of rice, promoting quick growth of the root system of rice, improving the transplanting survival rate of rice, inhibiting growth of weed, plant diseases and insect pests, reducing occurrence of soil-borne diseases to the furthest extent and reducing use of pesticides, is capable of reducing cost, and facilitates sustainable development of economy and society.

The invention relates to a method for preparing biological pesticide spinosad microcapsule preparation, which comprises preparation of urea-formaldehyde prepolymer solution, preparation of spinosad mixture solution and preparation of spinosad microcapsule. The microcapsule preparation technique is simple and convenient, easy to control, stable in reaction, less in auxiliary additive, low in production cost and suitable for industrialized production. The spinosad prepared by the method has high coating efficiency, is not damaged by rainwater or does not have degradation phenomenon after being irradiated by light, has long slow release period, and prolongs the pest control period, thus not only improving the control effect, but also reducing the environmental pollution.

The invention discloses a preparation method of humic acid sustained-release granules coated by Konjac glucomannan. The method comprises the following steps: firstly, putting humic acid granules into a coating machine; secondly, spraying a water solution of Konjac glucomannan, with a mass concentration between 0.1 and 1.0%, into the coating machine while rotating the coating machine, evenly mixing the mixture, and heating and drying the mixture to obtain dry granules, wherein the mass ratio of the humic acid to the water solution of Konjac glucomannan is 100 to between 5 and 30; and finally, adding the dry granules into a Boron cross-linker water solution with a mass concentration between 0.1 and 10.0% for soaking and then filtering, and drying the obtained solid to obtain the humic acid sustained-release granules coated by the Konjac glucomannan. The coating provided by the invention is degradable, and thus the coating can improve rather than have bad influence on the soil properties. Besides, material of the coating can extend the period of sustained release after being cross-linked with boron compounds. Meanwhile, boron contained in the cross-linker is an essential element of boron-containing fertilizers.

The invention discloses a wood-vinegar-containing biological compound fertilizer. The biological compound fertilizer is mainly prepared from the following raw materials in parts by weight: 10-15 parts of microbial inoculant, 20-30 parts of urea, 5-10 parts of diammonium phosphate, 10-20 parts of potassium chloride, 4-8 parts of calcium magnesia phosphate fertilizer, 10-15 parts of biochar, 1-3 parts of nano titanium dioxide, 0.5-1.5 parts of zinc sulfate, 0.2-1 part of copper sulfate and 2-5 parts of wood vinegar. The biological compound fertilizer is capable of enhancing the utilization ratio of the fertilizer, saving the raw materials and increasing the crop yield, and is also capable of supplying comprehensive nutrients required by crop growth, regulating plant growth and development, killing and resisting bacteria, expelling pests, effectively lowering the disease and pest morbidity and reducing the pesticide use.

The invention discloses a nitrogenous fertilizer coated slow release fertilizer. The nitrogenous fertilizer coated slow release fertilizer consists of a fertilizer core and a fertilizer core external coating. The coating is an amino resin-expanded graphite compound film layer or a composite film layer of the amino resin-expanded graphite compound film layer with a degradable polymer film layer. The degradable polymer is preferably amino resin. The amino resin is urea resin and/or malamine resin. The coating also can be compounded with a sulfur film layer and/or a high permeability resistant organic film layer. The resin-expanded graphite compound film layer can be mixed with high permeability resistant organic substance. The mass fraction of expanded graphite in the resin-expanded graphite compound film layer is preferably within the range of 2 percent to 15 percent. The total thickness of the coating is more than or equal to 40mum; the thickness of the high permeability resistant organic film layer is preferably less than or equal to 20mum; and the thickness of the sulfur film layer is preferably less than or equal to 50mum. A (main) coating layer of the nitrogenous fertilizer coated slow release fertilizer is harmless to the environment and is the nutriment in the fertilizer, and the nitrogenous fertilizer coated slow release fertilizer has low cost and long release period.

The invention relates to a preparation method of a fosthiazate microcapsule suspension. The preparation method comprises the following steps: after mixing urea and formaldehyde, adding distilled water to obtain a stable urea-formaldehyde prepolymer water solution; dissolving fosthiazate in an inorganic solvent, adding an emulsifying agent solution, and stirring to form a stable fosthiazate oil-water emulsion; and adding the urea-formaldehyde prepolymer water solution in the fosthiazate oil-water emulsion, stirring to ensure that urea-formaldehyde prepolymer is dissolved in a dispersion medium of the emulsion, slowly regulating a pH for performing a condensation polymerization, then adding a dispersing agent, and stopping the reaction after a warming reaction, regulating a pH value of a reactant, filtering, centrifuging and drying after cooling to prepare the fosthiazate microcapsule suspension. Compared with the prior art, the preparation method adopting a microcapsule technology has the advantages that an active material coats a macromolecule based material so as to be slowly released, thus the dry utilization efficiency is increased and the drug release period is controlled and prolonged, and the advantages of high efficiency, low toxicity, low residue, environment friendliness, and the like are also realized.

The invention provides a personalized tissue repairing scaffold for bone, cartilage, skin injury and other injury repairing fields. The personalized tissue repairing scaffold is molded by means of a three-dimensional printing technology, and comprises a substrate and a plurality of sustained-release microspheres dispersed in the substrate, wherein each sustained-release microsphere is of a three-layer structure, namely a core layer, an intermediate layer and an outer layer, and growth factor and/or drugs are loaded on the core layer and outer layer of each sustained-release microsphere. According to the characteristics of treatment positions, degradable high-molecular compound hydrogel or degradable high-molecular/inorganic hybrid hydrogel can be further poured into holes of the substrate, and molding is achieved by means of a low-temperature freeze-drying method. The invention further provides a method for preparing the personalized tissue repairing scaffold. The personalized tissue repairing scaffold has excellent biocompatibility and degradability by adopting the sustained-release microspheres with three-layer structures, is used for pulsed sustained release of growth factor and/or drugs to achieve the effect of long-time stable sustained release, and is beneficial to prolonging of sustained-release cycle of growth factors and/or drugs.

The invention discloses a preparation method of degradable sustained-release granules of humic acid. The method comprises the following steps: firstly, putting humid acid granules into a coating machine; secondly, spraying a water solution of guar gum, with a mass concentration between 0.1 and 1.0%, into the coating machine while rotating the coating machine, evenly mixing the mixture, and heating and drying the mixture to obtain dry granules, wherein the mass ratio of the humic acid to the water solution of guar gum is 100 to between 5 and 30; and finally, adding the dry granules into a Boron cross-linker water solution with a mass concentration between 0.1 and 10.0% for soaking and then filtering, and drying the mixture to obtain the degradable sustained-release granules of humic acid. The coating provided by the invention is degradable, and thus the coating can improve rather than have bad influence on the soil properties. Besides, material of the coating can extend the period of sustained release after being cross-linked with boron compounds. Meanwhile, boron contained in the cross-linker is an essential element of boron-containing fertilizers.

The invention discloses a fat-mass film-coated slow-release fertilizer comprising a fertilizer core and a fertilizer core outer capsule. The capsule is an amine resin-montmorillonite composite film or a composite layer of the amine resin-montmorillonite composite film and a degradable polymer film and can be compounded with a sulfur film and/or a high-resistance permeable organic film layer with preferable thickness not more than 20um; high-resistance permeable organic matter can be also mixed in the amine resin-montmorillonite composite film; the mass fraction of the montmorillonite in the high-resistance permeable organic film layer is preferably not more than 50% and optimally 0.5-30%; the total thickness of the capsule is preferably not less than 30um; and the thickness of the sulfur film is preferably 0-50um. The capsule body of the fat-mass film-coated slow-release fertilizer is (basically) harmless to the environment, is a fertilizer constituent and has low cost and long release period.

The invention discloses a biomass charcoal high efficiency controlled release fertilizer, and belongs to the technical field of agriculture. The biomass charcoal high efficiency controlled release fertilizer is composed of, by weight, 70 to 85 parts of biomass charcoal, 10 to 15 parts of a microbial agent, 15 to 25 parts of maize straw particle, 5 to 10 parts of urea, 6 to 12 parts of potassium sulphate, 6 to 12 parts of potassium manganate, 7 to 13 parts of a binder, and 10 to 15 parts of attapulgite. According to a preparation method, biomass charcoal is taken as a packaging material; cost is low; raw material resource is wide; composition is reasonable; no toxic substance is generated; no environmental pollution is caused by the biomass charcoal high efficiency controlled release fertilizer; and the biomass charcoal high efficiency controlled release fertilizer is a safe and healthy controlled-release fertilizer.

The invention relates to the technical field of water culture fertilizer, and specially relates to a preparation method of a water culture fertilizer for hydroponic crops. According to the preparation method, in a coating machine, an alginate water solution is used to carry out a coating treatment, then a crosslinking agent water solution is adopted to carry out a wrapping treatment to prepare dry particles; then an epiboly agent is added to carry out an epiboly treatment; after the alginate water solution reacts with the crosslinking agent water solution and the epiboly agent; the sustained-release period is prolonged, the water culture environment is improved; furthermore, as the sustained-release period is prolonged continuously, the alginate macromolecules are degraded into micromolecules, the fertilizer in the wrapped layer is completely released; after the sodium citrate in fertilizer particles is released, the alginate gel can be dissolved quickly, the alginate gel is decomposed, and the quality of water culture nutrient solution is improved.

The invention relates to wrapped controlled-release fertilizers and particularly relates to a special organic-biomaterial-wrapped controlled-release fertilizer for wheat and a production process thereof. The special organic-biomaterial-wrapped controlled-release fertilizer is prepared from the following raw materials in percentage by weight: 73-75% of fertilizer core, 23-25% of wrapping layer, 1.0-1.5% of binder and 0.5% of seal brightener, wherein the fertilizer core is a special compounded fertilizer which is applied to wheat sowing after corn stalks are returned to field, and the special compounded fertilizer consists of a urea fertilizer, a diammonium phosphate fertilizer, a potassium chloride fertilizer and clay and contains 25-27% of elemental nitrogen, 15-17% of phosphorus pentoxide and 7-9% of potassium oxide; the wrapping layer is a bio-organic material which is formed through uniformly mixing, stacking and composting 70-75% of chicken manure, 20-25% of weathered coal, 4-5% of rice bran or wheat bran and 1-2% of decomposition agent; and the binder is water glass or modified starch.

The invention belongs to the technical field of film-coated slow-release fertilizer and in particular relates to film-coated long-acting slow-release nitrogen fertilizer containing organic matters and a preparation method thereof. The invention aims at solving the problems of polyurethane film-coated fertilizer that the cost of production raw materials is high, the adding amount of a polyurethane material in a production process and the film-coating rate are difficult to grasp and land pollution is possibly caused when the fertilizer is used for long time. According to the technical scheme provided by the invention, a polyurethane layer is coated with the organic matters. Under the premisecondition that better slow-release performance and release period, the usage amount of the polyurethane material is effectively reduced, so that the production cost and the production difficulty are reduced; meanwhile, an organic matter layer can also provide organic matter nutrients for soil. The organic matter layer is prepared from raw materials including papermaking black liquid, a binding agent and ammoniated lignite; papermaking waste materials are utilized; the organic matter layer is easy to degrade and has the characteristics of energy saving and environment protection. A product is applicable to farm production and the preparation method is suitable for preparing the film-coated fertilizer.

The invention discloses a pesticide sustained release granule containing thiamethoxam and a preparation method thereof, wherein the pesticide sustained release granule is prepared from the following raw materials in parts by weight: thiamethoxam, anhydrous calcium sulfate, kaolin, other carriers, membrane material and white carbon black, and the membrane material is calculated in parts by mass and comprises the following components: 0.1-15 percent of displacer, 5-60 percent of curing agent, 0.01-5 percent of membrane filter agent, 0.2-5 percent of passivation material, and the balance of cross-linking agent, wherein the structure of displacer is similar with that of the thiamethoxam, and the pesticide sustained release granule is sequentially prepared according to the following steps of mixing, prilling, spraying membrane firstly, spraying membrane secondly, protecting granule, toning, checking and packaging, and the effective constituent of the pesticide sustained release granule is similar with that of the displacer, gradually penetrates outward, and the sustained release period is long, the pesticide effect is stable, the preparation method is simple and the cost is low.

The invention relates to a medicine-loaded coating and a preparation method thereof, in particular to a coating for a thermoplastic degradable fibrous woven stent and a preparation method for the coating. The medicine-loaded coating is a medicine-loaded thin layer which is formed on a plurality of pores and a relatively rough chitosan thin-film layer of the surface of a stent. The method for preparing the degradable medicine-loaded coating comprises the following steps of: (1) coating a chitosan-acetic acid-aqueous solution on the surface of the degradable fibrous woven stent, putting into absolute ethanol, and removing ethanol to form a chitosan coating; (2) coating a medicine-loaded polycaprolactone water dispersion on the chitosan coating, and removing the moisture to form a medicine-loaded polycaprolactone coating; and (3) continuing to coat the medicine-loaded polycaprolactone water dispersion, and adding and adjusting the medicine loading capacity and medicine loading variety. The invention is characterized in that: the method is simple and convenient; and the medicine loading variety, coating thickness and medicine loading capacity are convenient to regulate and control.

The invention relates to the technical field of slow-release fertilizers for cucumber planting, particularly a preparation method of a slow-release fertilizer for cucumber planting. Polyvinyl alcohol, starch and liquid paraffin/glycerol are used as raw materials to prepare a coating slurry which is degradable; and a compact porous structure can be easily formed on the film surface to prevent the moisture from entering the film structure, thereby effectively controlling the slow release of the fertilizer and prolonging the slow-release period of the fertilizer. By controlling the coating slurry preparation process and proportioning, the mechanical properties and degradation rate of the coating slurry are controlled, thereby effectively satisfying the nutrient release demands of the cucumber growth period, and enhancing the cucumber yield. The temperature control treatment after fertilizer spraying is performed, so that the pore size and porosity of the film are controlled, thereby ensuring the cucumber slow-release fertilizer to satisfy the demands of the cucumber growth period, implementing quantitative nutrient release on the cucumbers, enhancing the utilization ratio of the fertilizer and lowering the cucumber planting cost.

The invention discloses a good-stability long-action-period modified-Chinese-chestnut-protein-coated slow-release fertilizer. The fertilizer is made from the following raw materials, by weight part, 33-36 of cottonseed cake, 7-8 of potassium dihydrogen phosphate, 12-14 of fermented glutinous rice, 3-4 of ferrous chloride, 2-3 of tamarind seed polysaccharide gum, 1.4-1.5 of microcrystalline wax, 78-80 of fresh Chinese chestnuts, 18-20 of fruits of ficus pumila, 1.9-2.1 of a glutamine transaminase preparation and a proper amount of water. Through spraying for two times, the uniformity of coating films of fertilizer particles is greatly improved, so that stability of the fertilizer particles is improved and a slow-release period of the fertilizer in soil is prolonged. The fertilizer itself contains a large number of organic matters and readily-available inorganic nutrients, and can improve the nutrient construction and physical and chemical properties of the soil during a slow-release stage. The fertilization potential of the soil is improved, and crops are prompted to grow fast.

The invention discloses an aqueous medium air conditioning device, and a humidifier or a cooling fan provided with the aqueous medium air conditioning device. The aqueous medium air conditioning device comprises a device used for releasing antibacterial sterilization materials into water or generating the antibacterial sterilization materials, and a device used for realizing contact of water with air; water containing the antibacterial sterilization materials is contacted with air in the device used for realizing contact of water with air. Water in the device used for realizing contact of water with air can be supplied continuously. According to the aqueous medium air conditioning device, water containing the antibacterial sterilization materials is used for sterilizing air, compared with the prior art, sterilization effect lasts long, significant modification on a whole structure is not needed, introduction of a complex structure is not needed, cost is lower, practicality is higher, and the aqueous medium air conditioning device is suitable to be used in humidifiers and cooling fans.

The invention belongs to the field of biological medicine and chemical industry, and particularly relates to a synthesis method of degradable block copolymer hydrogel. The degradable block copolymer hydrogel is obtained by copolymerization of epsilon-caprolactone and polyethylene glycol as raw materials, and the synthesis method comprises the specific steps: weighing epsilon-caprolactone and polyethylene glycol, respectively carrying out water removal pretreatment on the epsilon-caprolactone and the polyethylene glycol by using a molecular sieve, adding the epsilon-caprolactone and the polyethylene glycol into a reactor, adding a catalyst, and reacting for 2-6 hours at the temperature of 100-150 DEG C under the protection of nitrogen to obtain a PCL-PEG-PCL block copolymer crude product; and dissolving, precipitating and drying the crude product to obtain the PCL-PEG-PCL degradable block copolymer hydrogel. The hydrogel has biocompatibility and degradability, the gel phase transition temperature (LCST) is within the human body temperature range, the used raw materials are easy to obtain and low in price, and the synthesis method is simple and easy to implement.

The present invention discloses a slow-release biological organic fertilizer, which is characterized by comprising the following raw materials by weight: 20-30% of Perilla Frutescens seed, 6-10% of hemp seed, 5-10% of fly ash, 15-25% of an organic matter, 10-15% of a high barrier property organic matter, 10-20% of an amino resin-expanded graphite complex, 5-10% of a degradable polymer, 5-8% of a silicate mineral, and 10-20% of humic acid. According to the present invention, the silicate mineral, the biological fertilizer and other components are integrated, such that characteristics of rich nutrition variety, strong crop specificity, stable physical and chemical indicators, excellent interaction, efficiency, fast-acting property, long-acting property, no toxicity, and wide application are provided; the amino resin-expanded graphite complex is adopted as the film forming substance, such that the release period of the fertilizer is increased, and the fertilizer efficiency of the fertilizer of the present invention is equal to or higher than the fertilizer efficiency of the fertilizer in the prior art; and the plant diseases and the insect pests of the crops are reduced, the stress resistance is enhanced, the film body is the fertilizer material, and no harm is produced to the environment.