371results about How to "Reduced release rate" patented technology

The invention relates to the technical field of the food additive and the microcapsule equipment capable of controlling the release of bioactive substances, in particular to a preparation method of menthol microcapsules. The preparation method uses menthol, wall material, emulsifier, crosslinking agent, pH regulator and water as the raw materials, wherein menthol is used as the core material, chitosan is used as the wall material, monoglyceride and Tween-40 are used as the compound emulsifier, 10% acetic acid is used as the pH regulator. The preparation method comprises the following steps: emusifying the solution under high pressure, adding modified starch to crosslink, finally adopting the spray drying technology to prepare the powdery menthol microcapsule product. The invention aims to provide a menthol microcapsule preparation method with safe and easy technology and low cost, increase the stability and heat resistance of menthol, control the release process and expand the application range.

The invention relates to a coated compound fertilizer, in particular to a totally biodegradable coated compound fertilizer and a preparation method thereof. The coated compound fertilizer consists of a coated layer and a compound fertilizer core. The main body of the coated layer is polylactic acid and/or polybutylene succinate. The coating process adopts fluidized bed spraying-coated technology, and comprises the following steps: dissolving polylactic acid and/or polybutylene succinate in trichloromethane, adding carboxymethylcellulose, urease and/or nitrification inhibitor, organic and/or inorganic conditioner in the solution, spraying and coating the surfaces of the fluidized compound fertilizer granules after uniformly mixing the mixture under the stirring of a stirrer to form the uniform and complete organic polymeric membrane layer. The process has the advantages of easy implementation, and capacity of effectively slowing down the release of the fertilizer nutrient to the outside and the conversion rate of nitrogen in soils, effectively controlling the release and conversion of the fertilizer nutrient in soils, and reducing the pressure on environment caused by the rapid release of nutrient. The coated material can be totally biodegradable, and the degradation products have no secondary pollution to the environment.

The invention discloses a porous inorganic material with insecticidal and mothproof functions and a preparation method thereof. The porous inorganic material with insecticidal and mothproof functions takes porous inorganic material as a carrier, the outer surface of the carrier is grafted with cationization reagent, the inner surface of the duct of the porous inorganic material is grafted with silane coupling agent, and micromolecule mothproof drug is loaded in a pore. The preparation method for the porous inorganic material with insecticidal and mothproof functions comprises the following steps: carrying out covalent modification on the porous inorganic material; grafting a functional group with a cation electric charge on the surface of the porous inorganic material; and loading the micromolecule insecticide into the pore of the porous inorganic material. The porous inorganic material with insecticidal and mothproof functions, which is prepared by using the preparation method disclosed by the invention, has the advantages of excellent insecticidal and mothproof functions, low cost, simple preparation technology and good commercial application prospect and can be used for fields,such as buildings, papermaking, coating, hygiene products and the like.

The invention belongs to the technical field of agricultural films and discloses a multi-layer co-extrusion based biodegradable mulch film and a preparation method thereof. The mulch film adopts a two-layer or three-layer structure, wherein an upper surface layer contains 99wt%-99.9wt% of biodegradable resin A and 0.1wt%-1wt% of auxiliaries; a middle layer is the biodegradable resin A; a lower surface layer contains 70wt%-97wt% of the biodegradable resin A and 3wt%-30wt% of biodegradable herbicide master batches; preparation of the master batches comprises steps as follows: 10wt%-60wt% of herbicide is mixed with 0.5wt%-7wt% of a surfactant A with a hydrophilic-lipophilic balance value being 7-10, and an obtained mixture is subjected to ultrasonic activation; an obtained product is mixed with 25wt%-75wt% of biodegradable resin B and 1wt%-10wt% of a surfactant B with a hydrophilic-lipophilic balance value being 3-6 at a high speed, an obtained mixture is subjected to extrusion pelletization, and the herbicide master batches are obtained. A mass ratio of the surfactant A to the surfactant B is 1:1-1:2.

The invention belongs to the technical field of potato cultivation, and discloses an application of a biodegradable weeding mulching film in potato cultivation. The mulching film comprises the following components in percentage by mass: 70-97% of biodegradable resin A and 3-30% of biodegradable herbicide master batches, wherein the biodegradable herbicide master batches are prepared by a method comprising the following steps: mixing 10-60% of a herbicide with 0.5-7% of a surfactant A, and performing ultrasonic activation; and mixing 25-75% of biodegradable resin B and 1-10% of a surfactant B at a high speed, and performing extrusion and granulation, thereby obtaining the herbicide master batches, wherein the mass ratio of the surfactant A (the hydrophilic-lipophilic balance value is 7-10) to the surfactant B (the hydrophilic-lipophilic balance value is 3-6) is (1:1)-(1:2). As the biodegradable weeding mulching film is used in potato cultivation, the problems that weeds can grow out from furrow surfaces and environment pollution can be caused by common plastics can be effectively prevented, and the labor cost can be lowered.

The invention discloses a preparation method of nanoscale temperature-controlled slow-release fragrant microcapsules. The nanoscale temperature-controlled slow-release aromatic microcapsules are prepared with the method comprising steps as follows: a co-melt is formed from a phase change material as a carrier and perfume and is taken as a core material, a polymer is taken as a wall material, and mixing, emulsifying and emulsion polymerization processes are performed. The nanoscale temperature-controlled slow-release fragrant microcapsules have two slow-release mechanisms: firstly, the phase change material is used as the carrier to realize temperature-controlled slow release; secondly, the dense polymer wall material is used. The product is environmentally friendly, non-toxic, high in mechanical strength and good in heat resistance, and can be used for fragrance enhancement and retaining of textiles, daily necessities and buildings.

The invention relates to a carbon release material for purifying groundwater polluted by nitrate nitrogen, which substantially comprises a carbon release agent, an oxygen capture agent, a KH2PO4, trace elements, coarse sand, cement and water, in which the carbon release agent provides carbon for the denitrification degradation process of the microorganism; the oxygen agent is used for capturing and consuming the dissolved oxygen in the groundwater to create an anaerobic environment; the KH2PO4 and the trace elements provide the required nutrient elements for metabolism of the microorganism; the coarse sand is used for promoting permeability of the carbon release material; the cement and the water adhere other components together in the carbon release material. A contrast test of denitrification degradation of nitrate nitrogen in the groundwater proves that the nutrition compound carbon release material in the invention can allow concentration of the dissolved oxygen in the water to decrease from 4.1mg/L to about 0.1mg/L as well as the concentration of the nitrate nitrogen to decrease from 103.4mg/L to 2.5mg/L; the degradation rate is as high as 97.6 percent while the degradation rate of the degradation rate in the contrast text is only up to 50.2 percent.

The invention belongs to the field of a magnetic nano-drug/a genetic carrier, in particular to a temperature-sensitive amphiphilic block copolymer/an iron oxide genetic carrier which has the capacity of controlling and relieving drug, a preparation method thereof and application thereof. Polyethyleneimine and polyoxyethylene-polypropylene oxide-polyoxyethylene amphiphilic block copolymer (Pluronic) are decoratively arranged on the surface of iron oxide super paramagnetic nanometer particles. DNA/RNA and the drugs having groups of negative electricity are loaded by the use of groups of positive electricity that are decoratively arranged on the Pluronic; drug loading and released temperature control can be realized by the temperature sensitivity of Pluronic near the body temperature; the amphiphilicity of Pluronic can used for realizing simultaneous loading of hydrophobic/hydrophilic drugs and improving the penetration capability of a drug carrier; the excellent dispersity of the carrier and the long-acting circulation through the body are realized by the biocompatibility of Pluronic; the super paramagnetism of iron oxide kernel is used for realizing targeting delivery of the drug.

The invention discloses a method for preparing a phase-change-adjustable emulsion gel type fat substitute and application and belongs to the field of grease and food processing. The preparation method comprises the following steps: taking an oil-soluble polysaccharide, an oil-soluble micromolecular gel, a water-soluble macromolecular gel and vegetable oil as raw materials, separately dissolving the oil-soluble polysaccharide, the oil-soluble micromolecular gel and the water-soluble macromolecular gel in a heated oil phase and a heated water phase, mixing and emulsifying an oil solution and a water solution to obtain an emulsion, and carrying out stirring and cooling to gelatinize the emulsion, thereby obtaining the emulsion gel type fat substitute. According to the method and the application, the oil-soluble polysaccharide is introduced into a system to reduce the consumption of the oil-soluble micromolecular gel, and the emulsion gel type fat substitute containing zero trans low-saturated fatty acid is prepared to replace the traditional plastic fat; and the whole oil content of emulsion gel is reduced by adding a water phase gelatinized by the water-soluble macromolecular gel, so that the emulsion gel type fat substitute is applicable to different application scenes.

The invention belongs to the technical field of fertilizer production and relates to biological semi-organic fertilizer containing amino acid and a making method thereof. Urea, monoammonium phosphate, potassium sulphate and bentonite are matched reasonably, amino acid mother liquor granules are adopted to form granulation master batch, aminated humic acid, medium trace element compositions, decomposed coal and amino acid mother liquor are blended to form a coating sizing agent used for primary coating of the granulation master batch, then a dusting powder agent is formed by microorganism bacterial liquid and calcium carbonate powder, a coating agent is formed by white oil, molasses and a mixture, and secondary coating is conducted in a coating machine to generate the biological semi-organic fertilizer containing amino acid. The biological semi-organic fertilizer containing amino acid has the efficiency of humic acid, amino acid, biological agents and the like and also has a slow-releasing function, effective constituents can be released slowly and orderly, fertilizer efficiency is remarkable, and production organization is facilitated.

The invention provides a calcium alginate-graphene oxide nanofiber and a preparation method and a drug-carrying calcium alginate-graphene oxide nanofiber and relates to the technical field of nanofibers. The preparation method of the calcium alginate-graphene oxide nanofiber comprises the following step: carrying out microfluidics spinning on a mixed solution of calcium alginate and graphene oxideand a calcium chloride solution, thereby obtaining the calcium alginate-graphene oxide nanofiber. The technical problem that a sudden drug release phenomenon is caused as a conventional calcium alginate nanofiber is good in hygroscopicity and low in mechanical strength is alleviated. By adopting the preparation method provided by the invention, the graphene oxide is put into raw materials, so that the calcium alginate-graphene oxide nanofiber has hydrogen bond interactions with oxygen-containing groups on a graphene oxide sheet and hydroxyl in calcium alginate molecules, the hydrogen bond function of the calcium alginate and water molecules is weakened, the swelling velocity of the calcium alginate is reduced, and the sudden drug release phenomenon can be prevented.

The invention relates to paper for daily use with a mosquito repellent function. The paper for daily use comprises a paper substrate and a mosquito repellent, wherein the mosquito repellent is taken as a capsule core material and is attached on the surface of the paper substrate and/or doped in the paper substrate in the form of microcapsule particles. In comparison with the prior art, through coating the mosquito repellent to the microcapsule particles and attaching the mosquito repellent on the surface and/or interior of the paper substrate, the volatilization speed of the mosquito repellent can be stopped or reduced by a microcapsule wall, so that invalidation of the mosquito repellent function of the paper for daily use due to too quick volatilization of the mosquito repellent can be avoided, thus the paper for daily use, provided by the invention, has a long-acting mosquito repellent function. The invention further relates to a production method of the paper for daily use.

Production of solid medicaments (A) containing vardenafil hydrochoride (I) in the form of the trihydrate involves using (I) of any water content in the production of (A) and converting (I) into the trihydrate form at an intermediate processing stage or in the final product. An independent claim is included for the medicaments (A) (specifically in coated tablet form) obtained by the process. - ACTIVITY : Vasotropic. - MECHANISM OF ACTION : None given in the source material.

The present invention relates to an encapsulated solid acid, which comprises a capsule core and a capsule wall, wherein the material of the capsule core is nitric acid powder. According to the present invention, the encapsulated solid acid adopted as the additive of a fracturing acidizing liquid can effectively delay the acid release rate; the fracturing acidizing liquid prepared from the encapsulated solid acid can effectively solve the problems of short action time, low acid liquid corrosion efficiency, poor construction effect, difficult filtration loss control, short acid corrosion crack and the like caused by the too rapid acid liquid reaction during the acid fracturing process; and the encapsulated solid acid further has the efficient plugging relieving ability, the solid particles have the temporary plugging and filtration loss reducing functions, and the site construction is simple.