13results about How to "Moderate pore size" patented technology

The invention belongs to the field of pesticide and chemical fertilizers, and particularly discloses a granular slow-release water-soluble fertilizer and a preparation method thereof.The granular slow-release water-soluble fertilizer is prepared from, by weight, 2-5 parts of a slow-release material and 60-70 parts of an element water-soluble fertilizer; wherein the element water-soluble fertilizer comprises liquid ammonia, phosphorus pentoxide, sulfuric acid, zinc sulfate, potassium sulfate, ammonium nitrate phosphorus and monoammonium phosphate; the sustained-release material comprises lignin and PLA, and the granular sustained-release water-soluble fertilizer is high in quick-acting property, less in permeation loss and long in drug release time.

The invention relates to the technical field of separation and purification, in particular to a preparation method of a high-purity scandium oxide adsorbent with a mesoporous silicon-based shell, and aims to solve the technical problems in the prior art. According to the silicon-based adsorbent, the preparation method of the silicon-based adsorbent and the application of the silicon-based adsorbent to adsorption of associated impurities of scandium in rare earth ore liquid, the silicon-based adsorbent containing aluminum is large in scandium ion adsorption capacity and good in selectivity and has good application prospects in the aspect of a rare earth purification process. In order to solve the technical problem, the scheme provided by the invention is as follows: the adsorbent takes amorphous mesoporous silica as a skeleton, and organic functional group solvent mixing treatment is performed after the amorphous mesoporous silica is synthesized, so that resin groups are uniformly distributed on the surface of the skeleton and in the skeleton.

The invention discloses an iron-doped molybdenum oxide synergistically enhanced polycaprolactone breast patch and a preparation method thereof.The preparation method comprises the following steps that ferric chloride hexahydrate serves as an iron source, ammonium molybdate tetrahydrate serves as a molybdenum source, and Fe-MoOv nano-enzyme rich in oxygen vacancies is prepared through a simple one-step solvothermal method; then, the Fe-MoOv nano enzyme and polycaprolactone (PCL) powder are dispersed in ethyl alcohol, and PCL / Fe-MoOv composite powder is obtained through ultrasonic mixing, centrifugal drying and grinding; finally, the composite powder is prepared into the PCL / Fe-MoOv breast patch through a selective laser sintering technology, the obtained PCL / Fe-MoOv breast patch aims at providing necessary mechanical support for a prosthesis implanted in the breast reconstruction process after a breast cancer operation and effectively inhibiting tumor recurrence, and the PCL / Fe-MoOv breast patch has the excellent photo-thermal performance and can be used for preparing the breast patch. The PCL / Fe-MoOv breast patch disclosed by the invention realizes combined treatment of a photothermal therapy and a chemodynamic therapy, has a remarkable anti-tumor effect, and has a wide application prospect in the field of breast cancer treatment.

The present application belongs to the technical field of anti-corrosion coatings, and particularly relates to a process for preparing an anti-corrosion coating for a sulfuric acid contact. After the sulfuric acid contact is subjected to chemical oxidation treatment, a modified powder A prepared by 2-methylimidazole and zinc nitrate hexahydrate and a powder B prepared by acrylic acid and azobisisobutyronitrile are compounded to obtain a sulfuric acid contact anti-corrosion coating slurry, which is sprayed onto the surface of the sulfuric acid contact and then cured to obtain an anti-corrosion coating. In order to solve the problem that the sulfuric acid contact coating in the prior art has poor corrosion resistance and is easily ineffective at high temperatures, the present application provides a process for preparing an anti-corrosion coating for a sulfuric acid contact, and the obtained sulfuric acid contact coating has strong corrosion resistance and long service life, and the reliability of the contact can still be guaranteed in a high-temperature and high-concentration reaction environment.

The utility model belongs to the sole technical field provides the perspiration and moisture absorption antibacterial composite sole, include: sole body, the sole body includes the slow shock antibacterial layer, slow shock antibacterial layer one side is connected with the sweat absorption layer, the sweat absorption layer is connected with the perspiration layer far from slow shock antibacterial layer one side, the perspiration layer is connected with the antiskid waterproof layer far from sweat absorption layer one side, slow shock antibacterial layer contacts foot, slow shock antibacterial layer is used for providing slow shock and antibacterial, the sweat absorption layer is used for absorbing the perspiration of foot, the perspiration layer is used for promoting the evaporation of perspiration and air circulation, the antiskid waterproof layer is contacted with ground, the antiskid waterproof layer is used for providing antiskid, the utility model discloses through the scientific collocation and reasonable layout of four different function materials, not only has promoted the wearing comfort, still has shown the remarkable superiority in foot health protection, environmental adaptability and safety etc.

The invention relates to the technical field of agricultural product processing, in particular to a preparation method of prinsepia utilis royle tea, which comprises the steps of prinsepia utilis royle bud harvesting, primary inspection, cleaning, baking, reinspection, fragrance extraction, fumigation and redrying. The preparation method comprises the following steps: harvesting, primarily inspecting and cleaning to ensure the purity of the raw materials, then baking flower buds, spreading for cooling, primarily drying and retaining aroma, after reinspection, heating, stir-frying, enhancing aroma, spreading for cooling again, then loading into a Chinese toon big steamer for fumigating to further improve the aroma and flavor, and finally, rebaking, ensuring thorough drying and spreading for cooling to obtain the prinsepia utilis royle tea. Therefore, purity and no pollution of the raw materials are guaranteed, drying and aroma enhancing processes are optimized, aroma and flavor of the tea leaves are improved, natural characteristics of the tea leaves are kept, consistency and stability of products are improved, and quality of the prinsepia utilis royle tea is improved.

The invention provides a method for regulating and controlling the surface appearance of a hollow fiber membrane by changing the composition of a gel bath, which comprises the following steps: (a) respectively spraying a membrane casting solution and a core solution from an outer cavity and an inner cavity of a spinning nozzle at the same time to form a hollow molded product with an inner surface and an outer surface; (b) passing the hollow molded article through a section of air path; and (c) immersing the product in the step (b) into a gel bath for split-phase curing and forming to form a green film, the gel bath is an aqueous solution containing a first organic matter or inorganic salt, the temperature of the gel bath is 30-80 DEG C, the mass concentration of the organic matter in the aqueous solution is 5-50%, and the concentration of the inorganic salt in the aqueous solution is 5-30 g / L. By changing the components and concentration of the gel bath, the mass transfer velocity of the solvent and the non-solvent is controlled, and then the phase splitting process is changed, so that the hollow fiber membrane which is high in surface porosity, moderate in pore size, narrow in pore size distribution and excellent in performance is obtained.

The invention discloses a method for preparing a ceramic water permeable brick through extrusion molding by taking waste porcelain as a raw material and a product prepared by the method. Waste porcelain particles, Longyan kaolin, ulexite and straw powder are taken as raw materials, and a peptizing lubricating solution is prepared from a sodium tripolyphosphate aqueous solution and a sodium silicate aqueous solution; through grain composition and kaolin peptization, plasticity and slippage effects are provided for the pug, and through extrusion molding, drying and calcination, the high-permeability ceramic water permeable brick is obtained. According to the invention, the ceramic water-permeable brick with excellent performance can be obtained through extrusion molding by taking the waste ceramic as the raw material without adding an organic plasticizer and a lubricant, the production efficiency of the ceramic water-permeable brick is improved, and the preparation cost of the water-permeable brick product is reduced, so that high-added-value recycling of the ceramic solid waste is realized.

The invention provides a high-performance zinc-iodine battery diaphragm as well as a modification process and application thereof. The modification process comprises the following steps: reacting 2, 4, 6-tri (4-aminophenyl) triazine and 4, 4 ', 4' '-(1, 3, 5-triazine-2, 4, 6-triyl) tribenzaldehyde with pyruvic acid in a solvent, quickly freezing at a low temperature, circularly degassing, reacting at a high temperature to obtain a yellow precipitate, and washing and drying the precipitate to obtain the covalent organic framework material. And applying the covalent organic framework material and graphene to the glass fiber diaphragm through a suction filtration method to obtain the zinc-iodine battery diaphragm. The zinc-iodine battery diaphragm prepared by the invention has excellent hydrophilicity and proper aperture, and can promote rapid transmission of Zn < 2 + >; and a small pore channel can effectively hinder shuttling of the polyiodide. Besides, carboxylic acid groups rich in the diaphragm can form a chemically stable interface on the surface of the diaphragm, the ion permeation speed is reduced, the conductivity of the diaphragm is improved, and an unexpected reaction between iodide ions and zinc ions is effectively prevented, so that the cycle life of the battery is prolonged, and the safety of the battery is improved.

The invention belongs to the technical field of anti-corrosion coatings, and particularly relates to a preparation process of an anti-corrosion coating of a sulfuric acid contact piece. The method comprises the following steps: carrying out chemical oxidation treatment on a sulfuric acid contact element, compounding modified powder A prepared from 2-methylimidazole and zinc nitrate hexahydrate and powder B prepared from acrylic acid and azodiisobutyronitrile to obtain sulfuric acid contact element anti-corrosion coating slurry, spraying the slurry to the surface of the sulfuric acid contact element, and curing to obtain the anti-corrosion coating. In order to solve the problems that in the prior art, a sulfuric acid contact piece coating is poor in corrosion resistance and prone to failure at high temperature, the invention provides the preparation technology of the sulfuric acid contact piece anti-corrosion coating, the obtained sulfuric acid contact piece coating is high in corrosion resistance and long in service life, and the reliability of a contact piece can still be guaranteed in a high-temperature and high-concentration reaction environment.

The invention discloses a nitrogen-doped cobalt disulfide porous carbon nanotube as well as a preparation method and application thereof, and belongs to the technical field of sodium ion batteries. Porous carbon nanotube packaging metal ions are prepared through electrostatic spinning, pore structures are generated on the surface and inside of carbon fibers through nitrogen-doped heat treatment, and the nitrogen-doped cobalt disulfide porous carbon nanotubes are obtained through vulcanization treatment. The porous structure can buffer the volume change caused by the reaction of the metal sulfide and sodium ions, the strong conductivity of the carbon fiber provides an effective electron transmission path for electron transfer, the metal sulfide improves the electrochemical performance, the porous structure of the material provides more active sites, and the sodium storage performance of the battery is improved. Therefore, the invention provides the sodium ion battery negative electrode material with high stability and high conductivity.

The invention provides a guided tissue regeneration membrane as well as a preparation method and application thereof. The guided tissue regeneration membrane is formed by interweaving and stacking cellosilk and has a porous structure; wherein the guided tissue regeneration membrane is derived from a fiber raw material, and the fiber raw material comprises a synthetic high polymer material and a natural high polymer material; the synthetic high polymer material comprises a non-elastomer material and an elastomer material; the non-elastomer material is a polyester compound. The guided tissue regeneration membrane disclosed by the invention does not swell under the condition that some tissue liquid or other liquid is more and exists for a long time (such as oral saliva); the material has a porous structure, is appropriate in pore size, can prevent fibroblasts, epithelial cells and other peripheral tissues with high migration speed from entering a bone defect area, and has a good physical barrier effect.

The utility model discloses a resin tooth particle cleaning device which comprises a haemostatic forceps body, a lock catch is arranged on the haemostatic forceps body, a tooth bin is fixedly arranged at the end of a first forceps rod of the haemostatic forceps body, a bin cover is fixedly arranged at the end of a second forceps rod of the haemostatic forceps body, and through holes are evenly and densely distributed in the wall of the tooth bin and the bin cover. The novel hemostatic forceps are reasonable in structural design, a plurality of resin tooth particles are placed through the tooth cabin, hot air flow penetrates through the through holes densely distributed in the tooth cabin wall and the cabin cover to clean the resin tooth particles in the tooth cabin, the hole diameter is proper, the hot air flow is guaranteed to pass through, meanwhile, leakage of the resin tooth particles is avoided, a lock catch on the hemostatic forceps body is not easy to open, and the hemostatic forceps are convenient to use. Therefore, the tooth cabin and the cabin cover are prevented from being opened, falling of resin tooth particles is avoided, operation is convenient, and cleaning efficiency is improved.