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38results about How to "Change dosage" patented technology

Method for adjusting and controlling diameter of silver nanowire through dosage of sodium chloride

The invention relates to a method for adjusting and controlling the diameter of a silver nanowire through the dosage of sodium chloride. The method is realized through the following measures: (1) 0.47 g of silver nitrate, 0.2 mL of water and 1mL of glycerin are mixed and dissolved at the room temperature to be prepared into a solution A; (2) 1-100 mg of sodium chloride, 2.1 g of polyvinylpyrrolidone and 59 mL of glycerin are successively added to a three-neck round-bottomed flask of 250 mL so as to be prepared into a solution B; (3) the solution A is added into the solution B, heat preservation is performed for 15 minutes to 4 hours at the temperature of 160-200 DEG C, centrifugation is performed on the reaction liquid, and lower-layer sediment is cleaned so as to obtain the silver nanowire. The method disclosed by the invention uses a polyalcohol reduction method as a basis, and the diameter of the metal silver nanowire can be conveniently adjusted and controlled by simply changing one parameter, namely the dosage of the sodium chloride; the preparation process is simple, the protection of inert gas is not needed, the reaction conditions are mild, the cost is low, and used chemical medicines are green, environmental friendly and harmfulless, so that the method is suitable for large-scale industrialized production.
Owner:山东利特纳米技术有限公司

Method for preparing silicon dioxide mesoporous spheres with adjustable pore sizes and particle sizes

The invention relates to the technical field of nano-biological materials, in particular to a method for preparing silicon dioxide mesoporous spheres with adjustable pore sizes and particle sizes. In the invention, a sol-gel method is utilized. The method comprises the following steps of: 1, mixing deionized water, ammonia water and absolute ethanol according to a ratio; 2, mixing long-chain organosilane and ethyl orthosilicate according to a ratio; 3, dripping the mixture obtained in the step 2 into the mixture obtained in the step 1, and stirring; 4, performing centrifugal separation, and washing by using ethanol; 5, drying; and 6, burning, and thus obtaining the silicon dioxide mesoporous spheres. The invention has the advantages that: the pore sizes of the silicon dioxide mesoporous spheres in the range of between 2.0 and 4.6nm can be adjusted by adjusting the ratio of water to the absolute ethanol in the step 1; the particle sizes of the silicon dioxide mesoporous spheres in the range of between 80 and 300nm can be adjusted by changing the using amount of a silicon source in the step 2; and the silicon dioxide mesoporous spheres prepared by the method have a narrower distribution range of the pore sizes and the particle sizes, higher biocompatibility and medicine loading and releasing performance, and a wider application prospect in the field of biomedicine.
Owner:EAST CHINA UNIV OF SCI & TECH

Environment-friendly water-based gravure ink and preparation method thereof

The invention relates to an environment-friendly water-based gravure ink and a preparation method thereof. The environment-friendly water-based gravure ink is prepared from the following materials inparts by weight: 30 to 40 parts of water-based polymer, 20 to 30 parts of organic pigment, 0.05 to 0.15 part of defoaming agent, 0.3 to 0.9 part of hydrophobic agent, 0.1 to 0.6 part of leveling agent, 0.1 to 1 part of water-based anti-settling agent, 1 to 2 parts of pH stabilizer, 1 to 2 parts of filler and 10 to 40 parts of deionized water. According to the environment-friendly water-based gravure ink and the preparation method thereof provided by the invention, processed by the advanced formula, the environment-friendly water-based gravure ink has the advantages of good printing effect, high adhesion, non-ignitability, inexplosiveness, non-toxicity and the like, does not impair the health of pressmen, and does not pollute the atmospheric environment, so the environment-friendly water-based gravure ink is a preferred environment-friendly water-based ink; the environment-friendly water-based gravure ink has good stability and heat resistance, and cannot be faded under a harsh environment after a long time, and the use of the filler and the leveling agent improves printing leveling, improves color saturation, and improves the wear resistance of the ink to a certain degree; moreover, the environment-friendly water-based gravure ink has extremely high grinding consistency, the usage of conventional ink is changed, and the cost in use is reduced.
Owner:天津华映蔚蓝科技有限公司

Preparation method, product and application of low-temperature phosphorus-doped carbon nitride loaded high-dispersion palladium hydrogen evolution catalyst

The invention provides a preparation method of a low-temperature phosphorus-doped carbon nitride loaded high-dispersion palladium hydrogen evolution catalyst and a product and application thereof. Thepreparation method of the phosphorus-doped carbon nitride loaded high-dispersion metal Pd particle hydrogen evolution catalyst is relatively simple in synthesis method, low in cost and capable of reacting at a low temperature. According to the invention, phosphorus is doped into a carbon nitride substrate, so that the Schottky barrier of the heterojunction is improved, meanwhile, by means of theaction of lone pair electrons of nitrogen and metal Pd, the dispersity of Pd nano particles is improved to a great extent, and loss of Pd is reduced. By improving the Schottky heterojunction barrier,more free electrons can flow to the Pd nano particles from the phosphorus-doped carbon nitride substrate, so that the electron aggregation of the Pd nano particles is greatly improved. The prepared phosphorus-doped carbon nitride loaded Pd metal nano-catalyst can be used in borane ammonia hydrogen evolution reaction, and the catalyst shows very high catalytic activity under visible light irradiation.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH

Preparation and application of bismuth vanadate hollow nanostructure modified by bismuth quantum dots

InactiveCN109453759AEnhanced photocatalytic reduction of CO <sub>2</sub> AbilityImprove conversion rateGas treatmentDispersed particle separationPhotocatalytic reactionSynthesis methods
The invention discloses a preparation method of a novel photocatalyst applied to photocatalytic reduction of CO2. The method mainly comprises building a hollow cake-shaped Bi4V2O11 nanostructure and growing Bi quantum dots on the surface of Bi4V2O11 in situ. The preparation method comprises the following steps: synthetizing the hollow cake-shaped Bi4V2O11 nanostructure by using a solvothermal method; and carrying out hydrothermal reaction on the prepared Bi4V2O11 and a reducer to obtain a Bi4V2O11(Bi/Bi4V2O11) composite nanostructure modified by the Bi quantum dots. The composite nanostructurehas larger specific surface area and can provide more active sites for photocatalytic reaction; meanwhile, the Bi quantum dots have quantum confinement effect and can directly reduce CO2 effectively.According to the Bi/Bi4V2O11 composite photocatalyst, a synergistic effect of Bi4V2O11 and Bi is utilized, so that the photoresponse range is expanded and the separation efficiency of photo-induced electron-hole pairs is improved; meanwhile, direct reaction between the Bi quantum dots and CO2 is used for improving conversion rate of the photocatalytic reduction of CO2; in addition, the compositematerial is simple in synthesis method and has broad prospects in the field of photocatalytic materials.
Owner:CENT SOUTH UNIV

Steamed stuffed bun processing equipment

The invention discloses steamed stuffed bun processing equipment, and relates to the technical field of food processing equipment. The steamed stuffed bun processing equipment comprises a dough kneading mechanism, a dough conveying mechanism, a wrapper pressing mechanism, a forming platform, a stuffing conveying mechanism, a forming mechanism and a leading-out mechanism, wherein a dough inlet is formed in the upper part of one end of the dough kneading mechanism; a strip forming unit in the dough conveying mechanism is longitudinally arranged, and the top end of the strip forming unit is communicated with the tail end of the dough kneading mechanism; a dough kneading unit is arranged on the bottom end of the strip forming unit; a conveyor belt is transversely arranged, the start end of the conveyor belt is arranged under the strip forming unit, and the forming platform is arranged on the tail end of the conveyor belt; the wrapper pressing mechanism is arranged above the forming platform; the stuffing conveying mechanism is arranged above the wrapper pressing mechanism; a stuffing conveying pipe of the stuffing conveying mechanism is arranged in the wrapper pressing mechanism in a stretching way; the forming mechanism is arranged on the forming platform and is used for enabling prepared steam stuffed bun wrappers and prepared stuffing to form steam stuffed buns; the leading-out mechanism is used for leading the steam stuffed buns out the forming platform. A preparation method of handmade steamed stuffed buns is simulated, the steamed stuffed buns having the same taste of the handmade steamed stuffed buns can be prepared, the operation is simple, and the use is convenient.
Owner:五河县纬立农业科技有限公司

Injectable colored gel pad for gastrointestinal mucosa delamination and application thereof.

The invention relates to the field of biomedical engineering, and discloses an injectable colored gel pad for gastrointestinal mucosa delamination and application thereof. A fibroin solution, a chitosan solution or a gelatin solution is firstly injected into the submucosa of the digestive tract; and then, a genipin solution containing disodium glycerophosphate is injected into the submucosa of thedigestive tract; and a gel pad is formed in the submucosa of the digestive tract after a cross-linking reaction occurs, and is used for separating a pathological mucosal layer from a muscle layer tofacilitate the dissection of the pathological mucosal layer. The forming time of the gel pad is controlled by controlling the dosage of the genipin and the disodium glycerophosphate in the genipin solution. The injectable colored gel pad for gastrointestinal mucosa delamination has the advantages that used materials are all liquid materials with low cytotoxicity and high biocompatibility; the formed gel pad is dark blue, so that pathological tissues can be clearly marked, and the submucosal dissection operation is more convenient and safer; a good clinical use effect is achieved; and the injectable colored gel pad is worthy of clinical popularization.
Owner:NANTONG UNIVERSITY

A kind of emulsion of dimer acid modified epoxy acrylic resin and preparation method thereof

The invention belongs to the technical field of modified epoxy resin and emulsion preparation, and discloses dimeric dibasic acid modified acrylated epoxy resin emulsion, a preparation method of the emulsion and application of the emulsion to the field of paint. The emulsion is Pickering emulsion obtained through the preparation by using dimeric dibasic acid and acrylic acid for modifying the epoxy resin by a phase inversion technology. The preparation method comprises the following steps of mixing epoxy resin, dimeric dibasic acid and catalysts; performing heating stirring reaction to obtain dimeric dibasic acid modified epoxy resin; mixing the dimeric dibasic acid modified epoxy resin with acrylic acid, catalysts and polymerization inhibitors; performing heating reaction to obtain acrylic acid modified hybrid resin; adding diluting agents, MA-POSS and co-emulsifiers; under the stirring and heating condition, dripping water till the phase inversion; obtaining water-based modified resin emulsion. The modified resin with good mechanical property is obtained; the stability of the emulsion can be improved by changing the consumption of MA-POSS; the consumption of conventional emulsifiers is reduced; the influence of the conventional emulsifiers on the product performance is greatly improved.
Owner:GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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