13results about How to "Good sustained release" patented technology

The invention relates to the technical field of agricultural fertilizers, and particularly discloses a magnesium aluminum silicate mineral derived layered magnesium aluminum bimetallic oxide-silicon oxide composite material as well as a preparation method and application of the magnesium aluminum silicate mineral derived layered magnesium aluminum bimetallic oxide-silicon oxide composite material. Magnesium / aluminosilicate minerals are successfully converted into the layered magnesium-aluminum bimetal oxide-silicon oxide composite material with a high specific surface area and a developed pore structure, and the layered magnesium-aluminum bimetal oxide-silicon oxide composite material is combined with nutrients through a simple and convenient fertilizer preparation process to prepare the slow-release fertilizer. The slow-release fertilizer has the advantages of cheap and easily available raw materials, simple and efficient preparation process, stable slow-release performance, soil improvement effect and the like, and provides an efficient and environment-friendly new way for development of the slow-release fertilizer; the method has important significance for promoting sustainable agricultural development and realizing high-value utilization of silicate minerals in the agricultural field.

The invention relates to the technical field of biological medicine materials, and provides a preparation method and application of biological polysaccharide macromolecule polymerization coated PQQ, a polysaccharide macromolecule slow-release skeleton carrier used for coating in the method comprises konjac glucomannan and chitosan, the carrier can form a honeycomb net structure, PQQ can be embedded into the net structure, and the PQQ can be embedded into the honeycomb net structure. The coated PQQ has a slow release function in the intestinal environment, the three-dimensional honeycomb structure can be extended under the intestinal environment condition, the PQQ is slowly released, and more than 90% of the PQQ is released within 8 hours.

According to the silk fibroin hydrogel microneedle manufacturing method and the hydrogel microneedle, a silk fibroin solution and a riboflavin aqueous solution are evenly mixed to obtain a mixed solution, then a hydrogen peroxide solution is added into the mixed solution to be mixed to obtain a precursor solution, then the precursor solution is poured into a light-transmitting microneedle mold, and the silk fibroin hydrogel microneedle is obtained. Placing a microneedle mold containing the precursor solution into a vacuum pump, performing vacuum pumping treatment, taking out the microneedle mold, placing the microneedle mold under ultraviolet irradiation for illumination to form a gel, drying the gel at room temperature, taking out the gel from the microneedle mold, forming a plurality of convex cones on the outer surface of the gel, and performing vacuum pumping treatment on the cones to obtain the composite microneedle. The silk fibroin hydrogel microneedle is obtained. According to the design, the operation requirement is low, the slow release effect is good, the biocompatibility is high, and efficient carrying of treatment medicine is facilitated.

The present application belongs to the technical field of biochar, and particularly relates to a high-activity acidolysis biochar, which is prepared by the following steps: S1, pretreating agricultural and livestock waste; S2, acidolysing the pretreated biomass with dilute acid to obtain acidolysed biomass; S3, placing the acidolysed biomass into a high-temperature furnace to perform carbonization under an oxygen-free condition, and using a step-by-step heating mode to obtain preliminary biochar; and S4, mixing the preliminary biochar with a copolymer solution to prepare the high-activity acidolysis biochar. In the present application, the sodium lignosulfonate-polyglutamic acid copolymer forms a stable connection with the biochar through chemical bonding, the porous surface of the biochar is uniformly covered with the copolymer to form a nanoscale film, the composite has stronger complexing, chelating and ion exchange capacity for heavy metal ions and other cations in the soil, and is helpful to reduce toxic substances in the soil and improve the soil environment.

The invention relates to the technical field of soil amendments, in particular to a modified charcoal composite amendment for improving soil acidification and low organic matter content and a preparation method. The modified charcoal composite modifier for improving soil acidification and low organic matter content is obtained by modifying corn straw particles with 3-(triethoxysilyl) propyl succinic anhydride, loading magnesium chloride and sodium silicate, calcining and sieving. The modifier can effectively improve the pH value, cation exchange capacity and organic matter content of soil, remarkably increase the content of clay particles in the soil, improve the soil structure, enhance the water and fertilizer retention capacity of the soil and improve the nutrient supply efficiency, thereby promoting the growth of crops.

The invention discloses a multi-element carbon-based microbial blended fertilizer for rice quality improvement and yield increase, and relates to the technical field of fertilizers, and the multi-element carbon-based microbial blended fertilizer comprises the following raw materials by weight: 10-20 parts of a multi-element carbon source, 40-50 parts of a compound fertilizer, and 1-1.5 parts of a vermiculite-loaded microbial agent. The vermiculite-loaded microbial agent is prepared from modified vermiculite-loaded nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and growth-promoting bacteria, so that the microbial strains can be slowly released and maintain the activity, and the activity of microbial flora can be durably promoted by combining a multi-element carbon source and a compound fertilizer; the flora activity promotes the release and absorption of multi-element carbon source nutrients, and the fertilizer efficiency of the microbial blended fertilizer is effectively prolonged, so that the rice quality improvement and yield increase are promoted.

The invention relates to a multifunctional medicine release composition as well as a preparation method and application thereof. The multifunctional medicine release composition has a treatment effect on attention deficit and attention disorder of children. The invention also provides a dispersible sustained-release multi-unit pellet system which comprises an active pharmaceutical ingredient and pharmaceutically acceptable auxiliary materials, and the active pharmaceutical ingredient exists in the core pellet. The invention also relates to a method for preparing the sustained-release multi-unit pellet system by adopting a multi-seal coating technology. The dispersible slow-release multi-unit pellet system disclosed by the invention has a good release characteristic.

The present invention relates to the technical field of plant nutrition fertilizers, and discloses a fertilizer capable of promoting the growth of underground tubers of crops and a preparation method thereof, comprising a coating material and a core fertilizer, wherein the coating material comprises a resin coating material and a bio-based coating material, wherein the resin coating material comprises a starch coating liquid and a curing agent, and the bio-based coating material comprises soybean oil polyol, polyether polyol, trihydromethylpropane, polylactic acid polyol, oleic acid, benzoic acid and microcrystalline wax. The present invention provides the required nutrition in the early stage of planting to promote root growth, and releases a large amount of required nutrients in the tuber formation and tuber expansion stage one month later, promoting cell division and cell expansion. The fertilizer of the present invention has good slow-release and controlled-release properties, high fertilizer utilization rate, low energy consumption and environmental protection, and can significantly increase the yield of root crops.

The present invention relates to a solid longhorn beetle attractant core and a preparation method thereof. The attractant core comprises an attractant and a carrier made of sawdust, wherein the attractant is adsorbed in the carrier; the attractant comprises borneol acetate, nonanal and ethanol, and the weight ratio of borneol acetate, nonanal and ethanol is (1-100): (10-50): (10-50). The preparation method comprises: configuration of attractant stock solution, configuration of attractant reserve solution, carrier preparation and attractant adsorption. The present invention optimizes the attractant formula, has a good attracting effect on longhorn beetles, is conducive to sawdust adsorption and sustained release, and prolongs its effective period. By adsorbing the attractant through a solid carrier, it can be more convenient to install, transport and store, is not prone to problems such as penetration and breakage, and is less likely to cause flammable hazards. Moreover, the carrier is made of sawdust, is easy to obtain, has low cost, and is waste-utilized, which effectively solves the problem of sawdust treatment. In addition, the present invention has a simple process and is easy to prepare.

The present invention provides a preparation method of colored slow-release scent beads, and its products and applications. The preparation method comprises the following steps: mixing an inorganic material, an ionic surfactant and water, stirring, filtering and drying to obtain a first material; mixing the first material, a thickener, a pigment, an auxiliary agent and water to obtain a suspension; dropping the suspension into a calcium salt solution, placing it, and obtaining a second material; washing and calcining the second material in sequence to obtain visualized particles; mixing the visualized particles with essence and / or spices to obtain the colored slow-release scent beads. The colored slow-release scent beads provided by the present invention have good appearance, high particle size and uniformity, low breakage rate, high product quality, high biological safety, and good fragrance effect.

The application discloses a method for removing titanium impurities in phosphoric acid solution, which comprises the following steps: extracting the phosphoric acid solution containing titanium impurities by using an organic solvent, and collecting the organic phase; mixing the organic phase with the phosphoric acid solution, adding an oxidant and hydrofluoric acid, and mixing uniformly to obtain a mixed solution; adding an ammonium fluoride solution dropwise into the mixed solution to react, and obtaining a reaction solution; washing, clarifying and separating the phases of the reaction solution, and back-extracting the organic phase to obtain the phosphoric acid solution from which the titanium impurities are removed; the removal method is characterized in that: firstly, trace H2O2 is used to convert titanium into active peroxotitanium species; secondly, the initiation effect of NH4F is used to activate the activity of fluoride ions; finally, HF is used as a main fluorine source to form a stable fluorotitanium complex and migrate to the acid phase, and low-titanium purified phosphoric acid is obtained after separation, so that the removal of titanium impurities is realized.

The invention discloses a moisturizing and skin brightening black tea and rose jelly film and a preparation process thereof.The moisturizing and skin brightening black tea and rose jelly film is prepared from, by weight, 5-10 parts of water, 3-5 parts of butanediol, 3-5 parts of 2, 3-butanediol, 3-5 parts of propylene glycol, 3-5 parts of arginine, 3-5 parts of 1, 2-hexanediol and 3-5 parts of p-hydroxyacetophenone. A plurality of components are compounded, so that the wet and effective effects are achieved; the skin is repaired, free radicals are removed, water is replenished, and the skin is brightened; the refreshing curry shape is more beneficial to slow release and full absorption of active ingredients, four rose shapes including rose water, rose petals and rose extracts are fused, deep yellowing, oxidation resistance and skin color brightening are achieved, and staying-up muscles are necessary; the black tea rose jelly film is suitable for dry and rough skin, dry and fine skin and other water-deficient skin; the skin is dark yellow, dull and matt, and needs to be whitened and brightened; the skin aging is prevented, and the adaptability is high.

This invention belongs to the field of medical patch technology. It discloses a reusable patch comprising, from bottom to top, a non-woven fabric layer, a PU film adhesive layer, a core, a leak-proof pad, a cover cotton, and a release film. The outer surface of the PU film is coated with a composite adhesive layer for durable adhesion. The core, made of a special matrix, traditional Chinese medicine powder, oil, and excipients, is adhered to the center of the PU film through this composite adhesive layer. A leak-proof pad, preferably with an annular leak-proof ring, is provided between the core and the PU film to effectively prevent side leakage of the core components. The cover cotton covers the core to absorb trace amounts of exudate. This invention, through the synergistic design of the silicone gel composite adhesive layer and the leak-proof structure, ensures good sustained-release of the medication and comfortable application while enabling the patch to be repeatedly peeled and reapplied. This solves the problems of traditional single-use patches being prone to leakage and contamination, making it economical, practical, and providing a superior user experience.