46results about How to "Good uniformity and stability" patented technology

The invention belongs to the technical field of preparation of graphene dispersing liquid and relates to a preparation method of the graphene dispersing liquid. The preparation method includes: dissolving a dispersing agent into a solvent to prepare a dispersing agent solution, adding a graphite raw material into the dispersing agent solution, performing primary high-shearing liquid phase stripping through high shearing force to obtain primarily stripped graphite slurry, applying pressure of 10-400MPa to the primarily stripped graphite slurry, then allowing the primarily stripped graphite slurry to pass a tiny slit and intensely collide with a breaking valve so as to allow the primarily stripped graphite slurry to be stripped by high shearing force and collision force for the second time, and allowing graphene to be evenly dispersed in the solvent to obtain the even graphene dispersing liquid. The preparation method has the advantages that the prepared graphene dispersing liquid is high in quality and good in evenness and stability, and the method is environmentally friendly in production process, capable of reducing environment pollution, simple in production process, easy in large-scale industrial production, high in yield, low in cost and friendly in application environment.

The invention discloses an organic liquid compound fertilizer and a preparation method thereof. The organic liquid compound fertilizer consists of the following components in part by mass: 30 to 40 parts of suspending agent mother liquor and 60 to 70 parts of nitrogen fertilizer, phosphate fertilizer, potassium fertilizer and trace elements, wherein the suspending agent mother liquor comprises 25to 32 parts of waste alcohol, 1 to 2 parts of carboxymethylcellulose sodium, 1 to 2 parts of xanthan gum, 1 to 2 parts of sodium pyrophosphate and 1 to 2 parts of attapulgite. The organic liquid compound fertilizer has the advantages of good stability and homogeneity, capability of simultaneously providing organic nutrients and trace elements for crops, convenient use and low preparation cost.

The invention belongs to the technical field of high-molecular material and discloses a continuous fiber reinforced polypropylene material and a preparation method thereof. The polypropylene material of the present invention comprises the following ingredients, by weight: 10-50 parts of continuous fiber reinforced polypropylene master batch and 50-90 parts of fixed length polypropylene material granule. The continuous fiber reinforced polypropylene master batch comprises the following ingredients, by weight: 40-60 parts of polypropylene, 40-60 parts of continuous fiber, 0.5-5 parts of coupling agent, 0.1-1 part of anti-oxidant, 0.1-1 part of lubricant and 1-10 parts of compatilizer. The fixed length polypropylene material granule comprises the following ingredients, by weight: 100 parts of polypropylene, 0.1-1 part of anti-oxidant and 0.1-1 part of lubricant. The invention also discloses a preparation method of the polypropylene material. The invention has advantages of reasonable design, simple operation, lower cost and easily controlled glass fiber content in a product, and excellent mechanical properties and good heat resistance of the continuous fiber reinforced polypropylene are maintained.

A field emission device, including: a cathode substrate; a carbon nanotube array slice attached on the cathode substrate, the carbon nanotube array slice including a plurality of carbon nanotube segments arranged approximately parallel to each other, the carbon nanotube segments each having a first end and an opposite second end, the first ends thereof terminating at a common plane, and the second ends thereof being electrically connected to the cathode plant. A method for manufacturing the field emission devices based on carbon nanotube array is also provided.

The invention discloses a tin dioxide/porous carbon composite lithium battery negative electrode material and a preparation method. The preparation method comprises the following steps: with fibroin and a high molecular polymer PAMAM as precursors, soaking a fibroin/PAMAM composite material after freeze drying treatment in a stannous sulfate aqueous solution for sufficient adsorption; performing high-temperature calcination to obtain the lithium battery negative electrode material. Sn<2+> and amino groups (mainly tertiary amino groups) in the PAMAM dendrimer can generate an effective complexing action so that the SnO2 nanoparticles are in-situ compounded on the surface of the fibroin/PAMAM; therefore, the yield of tin dioxide/porous carbon compound is higher, the uniform stability is better, and a lithium ion battery negative electrode material with high specific capacity and long cycle life is prepared finally.

The invention discloses an SERS sensor for nucleic acid detection and a preparation and multielement detection method thereof. The sensor is composed of a solid SERS substrate and a nucleic acid probe chain. The nucleic acid probe chain is fixed to the surface of the solid SERS substrate through a gold-sulfur bond, after complementary base pairing with target nucleic acid molecules, sensing detection for nucleic acid is achieved by detecting the SERS signal change of Raman molecules on the probe chain, and exposed loci on the surface of the substrate are sealed through thiol hexyl alcohol. The solid SERS substrate is a silver nanorod array type substrate. The 3' end of the nucleic acid probe chain modifies thiol, the 5' end of the nucleic acid probe chain modifies dye molecules, part of base sequences in the probe chain are complementary to form a hairpin-shaped structure, and part of the base sequences and nucleic acid to be detected can be in complementary pairing. The detection limit of the sensor reaches the fmol level (fM), and joint detection of multiple nucleic acid markers can be achieved. The sensor is easy to prepare, high in detection sensitivity and good in reliability, and has wide application prospects in the fields of early tumor diagnosis and the like.

An apparatus for electroplating one or more surfaces (2,3) on one or more substrates (1), especially solar cells (1a), is described. The apparatus includes an electrochemical coating bath (13), which has a coating tank (12) filled with an electrochemical coating liquid (14). The apparatus also includes a conveying device (15) for transporting the substrate through the coating bath (13), a light source circuit (60) with light sources (64) for irradiating the substrate (1) and an electrolytic cell rectifier circuit (50) for the substrate with anodes (54). The apparatus is characterized by a device for generating synchronous current pulses and light pulses, so that during a time interval between the current pulses the irradiating of the substrate or substrates is interrupted. A process for electrochemical plating of the surface of the substrate or substrates is also described.

The invention discloses a preparation method of a polypyrrole/polyaniline electromagnetic shielding composite material. A nylon fabric is selected as a base fabric, and a compound of polyaniline and polypyrrole is prepared on the surface of the base fabric by in-situ polymerization. The method comprises the following steps: 1) a pyrrole monomer solution is prepared; 2) the base fabric sufficientlyadsorbs the pyrrole monomer; 3) a pyrrole-aniline solution is prepared; 4) the base fabric sufficiently adsorbs the aniline monomer; 5) an oxidant-dopant solution is prepared; 6) polypyrrole and polyaniline are generated on the surface polymerization of the base fabric by polymerization; and 7) the obtained fabric is cleaned and aired to obtain the polypyrrole/polyaniline electromagnetic shielding composite material. A result of test of the material shows that the material has an electromagnetic shielding effect, and also has excellent mechanical properties, excellent electrical conductivityand excellent comprehensive performances.

The invention provides a display substrate, a preparation method thereof and a display device, belonging to the technical field of displays. The display substrate comprises a display region, a periphery region and a baffle wall, wherein the display region is surrounded by the periphery region, and sealing gum is arranged at the periphery region; the baffle wall is arranged at the position at the corner of the sealing gum, is close to the display region and is of an integrated structure. According to the display substrate provided by the invention, compared with obstacles which are synchronously formed by partitions and consist of multiple baffling pillars in the prior art, the baffle wall which is of an integrated structure is taken as a baffle, the stability and the uniformity of the height and the width of the baffle wall are relatively good, furthermore, the pollution caused by aspirates of the sealing gum to the display region of the display substrate can be relatively prevented, meanwhile, the sealing gum cannot overflow from the position of the baffle wall, and the light leakage of the sealing gum from the corner of the sealing glue can be effectively prevented.

The invention discloses a graphene conductive thin film used for a touch screen. The graphene conductive thin film is prepared from the following raw materials in parts by weight: 110-120 parts of polytetrafluoroethylene, 10-13 parts of conductive graphite solution, 20-30 parts of acrylamide, 0.1-0.2 parts of ethylene thiourea, 0.7-1 parts of sodium persulfate, 1-2 parts of glyceryl tristearate, 0.7-1 parts of trimethylolpropane, 1-2 parts of calcium stearate, and 0.6-1 parts of 8-hydroxyquinoline. The thin film is high in conductivity, uniform stability and quality, without causing the phenomena of bubble forming and the like when the thin film is used on the touch screen.

The invention discloses a method for preparing a standard substance for detecting the residual amount of ketones in the paper for cigarettes. The method comprises the steps of removing the moisture in glyceryl triacetate as a solvent, respectively weighing and uniformly mixing the relevant acetic esters in glyceryl triacetate according to the concentration of the required standard substance, and preparing into a standard substance of a ketone mixed solution; sealing the standard substance of the mixed solution into a headspace bottle under the nitrogen protection; detecting the uniformity and the stability of the standard substance of the ketone mixed solution, and using a single ketone certified reference material to perform constant value for the obtained standard substance of the mixed solution. The standard substance for detecting the residual amount of acetic esters in the paper for cigarettes provided by the invention uses the standard substance of the glyceryl triacetate as a solvent, so that the detection working efficiency is improved and the detection of the residual amount of ketones in the paper for cigarettes is accurate.

The invention discloses a poured salt core for casting and a preparation method thereof. The poured salt core is composed of edible salt, a reinforcing agent, a binding agent, an assistant and a filling agent; the reinforcing agent is one kind of or multiple kinds of aluminum oxide, mullite, short asbestos wool and glass fibers; the binding agent is one kind or multiple kinds of kaolin, calcium carbonate and glass water; the assistant is one kind or multiple kinds of potassium chloride and sodium fluorosilicate; the filling agent is sodium carbonate; the salt core is non-toxic, odorless and free of harmful impurities, mineral salt is taken as the main raw material, the reinforcing agent, the binding agent, the assistant and the filling agent are additionally added, after high-temperature melting is carried out at the temperature of more than 800 DEG C, and the molten mixture is poured into a required mold so that the salt core with the required shape can be prepared. The poured salt core is uniform, good in stability, easy to demould, the preparation process of the common salt core is simplified, and compared with a common salt core, the density, the hardness and the tensile strength and the like are improved by more than one time; and according to the formula, the salt core is prepared by a complexity inner cavity pouring filling method for the first time in the world, and theblank is filled in the world.

The invention belongs to the technical field of functional drink preparation and particularly relates to freshly pressed milk beverage containing fructo-oligose-anthocyanin and a preparation method of the freshly pressed milk beverage. The freshly squeezed milk beverage is prepared from the following components in parts by weight: 30-50 parts of ultra-fine cold pressed peanut meal powder, 30-50 parts of rock candy, 70-90 parts of fructo-oligose, 10-20 parts of maltose, 0.1-0.5 part of salt, 0.08-0.16 part of citric acid and 50-80 parts of black chokeberry juice, and a soluble soybean polysaccharide which is 0.2-0.5% of total weight is added. Through adding the ultra-fine cold pressed peanut meal powder to the black chokeberry juice, the ingredients, such as revertose contained in cells, multiple amino acids, metal elements, unsaturated fatty acid and isoflavone are fully exposed and dissolved into the black chokeberry juice due to cell lysis of a peanut powder sample, and through addition of 10% fructo-oligose, the stability of the anthocyanin in black chokeberry juice drink is greatly improved.

The invention relates to the technical field of preparations, in particular to a soft capsule and a preparation method thereof. The soft capsule comprises contents and a capsule shell, wherein the contents comprise an effective active ingredient, glycerin and a solvent. Glycerin in a specific ratio is added to the contents of the soft capsule, the elasticity and the hardness of the soft capsule shell can be effectively maintained, and the controllability purpose is achieved.

The invention provides a method for rapidly detecting macroscopic indexes of asphalt based on near infrared spectrum technology. The method comprises the steps of step 1, detecting the absorbance of aplurality of asphalt samples in different batches of the same variety at test wave number of 600-4000 cm-1, enabling the organic groups to be qualitatively analyzed according to the positions of wavepeaks in the infrared spectrogram, performing quantitative analysis on the organic groups according to the absorbance, and establishing an infrared spectrum database of the asphalt samples; step 2, testing macroscopic indexes of the asphalt samples in the step 1, establishing a macroscopic index database of the asphalt samples; step 3, establishing a quantitative relation model of the asphalt sample infrared spectrum database and the macroscopic index database; step 4, detecting the absorbance of the to-be-detected asphalt samples with the test wave number of 600-4000cm-1 to form an infraredspectrogram of the asphalts to be detected; and step 5, substituting the to-be-detected asphalt infrared spectrogram formed in the step 4 into the infrared spectrum and macroscopic index quantitativerelation model established in the step 3, and calculating macroscopic indexes of the asphalt samples to be detected.

The invention discloses anti-leakage waterborne epoxy coating which is prepared from the following raw materials in parts by weight: 0.8 to 1 of fatty acid diethanol amide, 0.1 to 0.2 of nonyl phenol,1 to 2 of oleic acid polyoxyethylene ester, 2 to 3 of calcium ricinoleate, 0.7 to 1 of naphthenic soap, 1 to 2 of zinc dialkyl dithiophosphate, 4 to 6 of magnesium silicate, 6 to 8 of hydroxyethyl cellulose, 4 to 7 of polyethylene glycol adipate and 100 to 120 of epoxy resin E51. The coating disclosed by the invention has the advantages of good uniform stability, strong leakage resistance and excellent comprehensive performance.

The invention discloses an end face pumping Q-switched laser based on a doping concentration gradient crystal. The end face pumping Q-switched laser is characterized in that the doping concentration of a laser working substance is exponentially increased along a light transmission direction, a pumping light incident plane, namely a pumping end face, is a low-concentration end, and a non-pumping light incident plane is a high-low-concentration end; the laser working substance is an Nd <3+>-doped crystal; a laser resonant cavity is an L-shaped folding cavity, and the folding angle is 90 degrees; and the curvature radius of a plano-convex total reflection mirror and the curvature radius of an output cavity mirror are designed according to the thermal focal length value of the thermal lens effect of the laser working substance and the structure of the laser resonant cavity. According to the invention, the distribution of pumping light and heat in the laser working substance is more uniform, the thermal lens effect is reduced, the laser output power is improved, the uniformity and stability are better, the laser conversion efficiency is improved, and the beam quality of the output laser is improved.

The invention discloses an environment-friendly epoxy aqueous paint, and a preparation method thereof. The environment-friendly epoxy aqueous paint is composed of, by weight, 130 to 200 parts of aqueous epoxy emulsion, 1 to 2 parts of sodium myrastate, 2 to 3 parts of diisocyanate, 30 to 40 parts of methanol, and 30 to 40 parts of tetrabutyl titanate. According to the preparation method, tetrabutyl titanate is taken as a precursor, a sol obtained through hydrolysis is mixed with the aqueous epoxy emulsion, quaternization is carried out under the action of methanol, and the antibacterial performance and yellowing resistance of obtained finished product paint are improved. The coating film of the environment-friendly epoxy aqueous paint is high in uniform stability, and finished product quality is high.

The invention provides an electrostatic spraying system of brazing flux. The electrostatic spraying system comprises a feeding area used for conveying to-be-sprayed products. The output end of the feeding area is connected with an electrostatic powder spraying chamber. The electrostatic powder spraying chamber comprises at least two storage boxes located at the top. Each storage box is connected with a feed device. The output end of each feed device is connected with a mixing box. The output end of each mixing box is connected with a quantitative feeding device. The electrostatic powder spraying chamber further comprises an electrostatic generator enabling brazing flux powder to be electrified and spray guns used for spraying. The output end of the electrostatic powder spraying chamber isconnected with a discharging area. Uniformity and stability of spraying are good.

The invention discloses formaldehyde-removing adsorption coating for an interior wall. The formaldehyde-removing adsorption coating is prepared from the following raw materials in parts by weight: 90to 100 parts of diatomite, 20 to 30 parts of modified silicone acrylic emulsion, 1 to 2 parts of ricinoleic acid, 0.4 to 1 part of 2-thiolbenzimidazole, 1 to 2 parts of sodium lauryl sulfate, 0.7 to 1part of sorbitan monooleate, 1 to 2 parts of calcium propionate and 2 to 3 parts of oleic acid polyoxyethylene ester. According to the formaldehyde-removing adsorption coating for the interior wall,the diatomite and the silicone acrylic emulsion have very good dispersion compatibility and a coating film has good uniform stability and high adsorption performance; the formaldehyde-removing adsorption coating is especially suitable for being used as interior wall coating and has a very good promotion effect on air purification and formaldehyde adsorption.

A hydraulic fertilizer pushing mechanism with dual-layer baseplates belongs to the field of fertilization tools. The mechanism solves the problems that an existing fertilizer pushing mechanism is lowin stability and uniformity during fertilizer pushing. The mechanism comprises a traction frame base, a traction frame, a large hydraulic oil cylinder, a lower fertilizer pushing plate, a driving support, a small hydraulic oil cylinder and an upper fertilizer pushing plate, wherein the traction frame is installed on the traction frame base, a cylinder body part of the large hydraulic oil cylinderis connected to the traction frame, an output end of the large hydraulic oil cylinder is connected to the lower fertilizer pushing plate, a the driving support is installed on the lower fertilizer pushing plate, a cylinder body part of the small hydraulic oil cylinder is connected to the driving support, and an output end of the small hydraulic oil cylinder is connected to the upper fertilizer pushing plate. The mechanism is driven in a hydraulic and graded manner by the dual-layer baseplates, so that the problem that fertilizer conveying is difficult when a fertilizer box is too high or too long in limited space can be solved.