7results about How to "Good slow release" patented technology

The present application relates to a novel long-acting solid coated slow-release acid and a preparation method. The solid coated slow-release acid has a core-shell structure, the shell layer comprises a polymer, and the core comprises an acid former; the acid former is at least one selected from chlorinated aromatic hydrocarbons, chlorinated acid esters and acid chlorides, and the polymer is at least one selected from polyesters, poly(meth)acrylates, epoxy resins, polyolefins, polyacrylonitriles, polyimides, polyvinyl alcohols. The solid coated slow-release acid has the advantages of small environmental pollution, long acid release time, excellent deep penetration performance, high acid generating efficiency, easy storage and transportation, good slow-release performance and simple preparation.

This invention discloses a method for preparing a multifunctional slow-release fertilizer. First, a porous carrier is prepared by co-precipitation and calcination of iron tailings acid leaching solution and aluminum salts. Nutrient solution is loaded onto the carrier, dried, and granulated to obtain fertilizer particles. A bio-based composite coating precursor solution is prepared by mixing nanocellulose whiskers, sodium alginate, polyacrylic acid, and fumed silica, and a calcium chloride-chitosan solution is used as a crosslinking agent to obtain fertilizer particles. Finally, fluidized bed coating technology is used to sequentially spray the coating precursor solution and crosslinking agent solution onto the surface of the fertilizer particles. After two coating processes and drying, a multifunctional slow-release fertilizer is obtained. This invention combines the preparation of an industrial solid waste resource utilization carrier, the construction of a bio-based composite coating, and a rhizosphere-responsive slow-release design to prepare a multifunctional slow-release fertilizer. This fertilizer not only has low preparation cost but is also rich in nutrients, has good slow-release performance, and excellent mechanical stability.

The application belongs to the technical field of fertilizers, and particularly relates to a humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate and a preparation method thereof. The humic acid organic-inorganic compound fertilizer comprises the following raw materials in parts by weight: 22-30 parts of biogas residue, 35-55 parts of humic acid, 8-13 parts of fine columnar algae powder, 5-8 parts of urea, 12-17 parts of ammonium sulfate, 12-15 parts of superphosphoric acid calcium, 15-20 parts of potassium sulfate and 10-15 parts of slow release coating suspension. Test results show that the humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate prepared by the application can reduce the nitrogen and phosphorus release rates of the humic acid inorganic compound fertilizer, has better slow release effect, significantly promotes the plant height, stem diameter and root length of soybeans and corn, has obvious growth promotion effect, and has wide application prospect.

The utility model discloses a medical dressing with medicine loading groove, medical dressing includes polyurethane film and antiseized layer, be equipped with a plurality of medicine loading groove on the polyurethane film, be equipped with hydrogel layer in the medicine loading groove, fill in the medicine of hydrogel layer, one side of the antiseized layer with polyurethane film is equipped with medicine loading groove and is close -fitted. The utility model discloses medical dressing is equipped with medicine loading groove on polyurethane film, fills hydrogel layer in medicine loading groove inner chamber, and the medicine is loaded in hydrogel, can promote the slow -release capacity of medical dressing. The medicine is distributed on the slow -release skeleton, and the slow -release skeleton is prepared through three -dimensional micro -nanometer printing, and the inner chamber is hollow, and the shape of slow -release skeleton is customized according to the shape of medicine loading groove, makes the quantity of slow -release skeleton in medicine loading groove maximization, forms medicine -skeleton load structure, can accommodate more medicine in medicine loading groove to good slow -release effect.

This invention provides a drug-loaded halloysite material, its preparation method, and its application. The drug-loaded halloysite material is prepared from halloysite, a drug, and an encapsulation material. Halloysite has good loading and sustained-release effects on drugs such as ciprofloxacin, diclofenac sodium, and nicotinic acid. Encapsulation with the encapsulation material further delays the release of the drug, resulting in slow release in the intestine and stomach, achieving targeted and controlled release. In addition, its preparation method is simple and can achieve rapid encapsulation, further avoiding drug loss during the encapsulation process. It can be used in the biomedical field, especially in the application of sustained-release drugs and intestinal targeted drug delivery, showing good application prospects.

This invention discloses a slow-release granule formulation of sodium alginate-biochar loaded with thiamethoxam, its preparation method, and its application. The slow-release granule uses biochar as the adsorbent carrier to adsorb thiamethoxam and sodium alginate as the encapsulating material, which is then cross-linked and solidified by dripping calcium chloride solution. The mass ratio of biochar to thiamethoxam is (10~30):1, the mass-to-volume ratio of sodium alginate to water is 1.5~2.0 g:100 mL, and the concentration of the calcium chloride solution is 1.5%~3.0%. The prepared slow-release granule has a cumulative release time of over 90 hours in distilled water, with no obvious burst release phenomenon. Pot experiments show that it maintains a continuous control effect on eggplant thrips for 7 days after application, which is superior to conventional spraying treatment. This invention has a simple preparation process, is environmentally friendly, and has excellent slow-release performance, making it suitable for green control of agricultural pests.