9results about How to "Prevent flocculation" patented technology

The invention relates to the field of aluminum nitride materials, and provides a preparation method of high-reliability aluminum nitride applied to an IGBT (Insulated Gate Bipolar Translator), which solves the defects of low bending strength and poor thermal shock resistance of an aluminum nitride substrate in the prior art, and comprises the following preparation steps: (1) pretreating powder; (2) tape casting; (3) discharging glue; (4) sintering; and (5) post-treatment.

This application discloses a ceramic trademark glaze and its preparation method. The trademark glaze comprises 50-60% low-temperature frit; 5-10% zinc oxide; 20-25% zirconium silicate; 8-12% calcined kaolin; 1-2% sodium carboxymethyl cellulose; 0.5-1.0% sodium tripolyphosphate; and 1-5% pigment. The trademark glaze exhibits excellent printing performance, good thixotropic properties, smooth screen printing, and clear line printing without breaks or ink bleeding; it can print clear lines as narrow as 0.3mm. The firing effect is ideal, with pure and vibrant colors and high contrast with the white base glaze; the glaze surface is smooth and even, with no edge curling. It has strong environmental resistance, high hardness after firing, and is resistant to acids and alkalis, maintaining clarity even in harsh outdoor environments for extended periods. The process is widely adaptable, suitable for application to green or unglazed ceramic bodies, and has good compatibility with conventional electrical porcelain firing processes.

The invention provides black paste for labor protection gloves and a preparation method of the black paste, and belongs to the technical field of preparation of labor protection appliances, an anionic surfactant in the black paste has good permeability, and can accelerate the exchange speed of a solvent and water in the black paste and improve the brightness; the added dispersing agent can avoid flocculation of carbon black particles, stability of the color paste is improved, in addition, the amine value of the color paste is low, and the viscosity cannot be affected under the high-temperature condition; the adopted hydroxyl acrylic acid modified polyurethane contains COOH, OH, benzene ring and other pigment affinity groups, has the advantage of high gloss, and also has certain dispersion and viscosity reduction functions. The black paste provided by the invention is wide in raw material source, low in price, simple in production process and low in cost, and the prepared black paste has the characteristics of high blackness, high brightness, high solid content, low viscosity, low odor and good wear resistance, and has good application prospects and popularization values.

The application discloses a preparation method of a high-strength flexible self-supporting hydrophobic electromagnetic shielding film, which comprises the following steps: weighing a certain amount of carbon titanium-aluminum, slowly adding the carbon titanium-aluminum into a lithium fluoride / hydrochloric acid etching solution, magnetically stirring in a water bath at a certain temperature for a period of time, obtaining an etched carbon titanium-aluminum dispersion liquid, carrying out acid pickling on the carbon titanium-aluminum dispersion liquid by using dilute hydrochloric acid, and then washing the carbon titanium-aluminum dispersion liquid until neutral, so as to obtain multi-layer titanium carbide; carrying out ultrasonic treatment on the multi-layer titanium carbide, so as to obtain few-layer titanium carbide; mixing the prepared few-layer titanium carbide and bacterial cellulose with nano-iron oxide respectively; alternately performing vacuum filtration on the mixed solutions of bacterial cellulose / nano-iron oxide and few-layer titanium carbide / nano-iron oxide; and naturally airing the obtained film at room temperature. Finally, methyltrimethoxysilane is deposited on the surface of the film to form a hydrophobic network. The film prepared by the method has the characteristics of good flexibility, high electromagnetic shielding performance and high mechanical strength.

This invention belongs to the field of waterborne anti-corrosion coating manufacturing technology, specifically relating to highly corrosion-resistant waterborne coatings and their preparation methods. This invention uses waterborne epoxy resin emulsion and waterborne acrylic emulsion as resin matrices, improving the film density of the waterborne coating. In the composite anti-rust pigment, surface-modified graphene and calcium-ion-loaded silica particles are grafted with epoxy groups using KH-560, improving the compatibility of the calcium ion-exchange type anti-rust pigment in the resin matrix. Modified mica iron oxide and surface-modified graphene extend the diffusion path of corrosive media through a layered structure. Potassium silicate helps form an inorganic silicate protective layer and seals the micropores of the coating, improving the coating's shielding performance. The calcium ion-exchange type anti-rust pigment generates a silicate passivation film through calcium ion exchange, reducing the rate of further iron dissolution. The waterborne coating of this invention is suitable for anti-corrosion protection of metal substrates in harsh corrosive environments such as marine salt spray and industrial acids and alkalis.

The invention belongs to the technical field of lithium iron phosphate batteries, and particularly relates to a lithium iron phosphate precursor slurry additive and carbon-coated lithium iron phosphate. The main component polycondensate A is rich in amino groups, hydroxyl groups, benzene rings and other functional groups capable of forming strong intermolecular force with lithium iron phosphate, and can be adsorbed on the surfaces of lithium iron phosphate particles during slurry grinding, at the moment, polyether side chains rich in the polycondensate A form a hydrated protective layer, flocculent precipitation between two lithium iron phosphate particles is prevented, and the lithium iron phosphate particles are prevented from being separated from each other. Therefore, uniform particle size distribution of the lithium iron phosphate is ensured, and the viscosity of the slurry is greatly reduced; the compound component ether amine polymer B can also be strongly adsorbed on the surface of the lithium iron phosphate to assist the main component polycondensate A in reducing the viscosity of the slurry; meanwhile, the compound C is an organic salt, so that the electrostatic repulsion on the surface of the lithium iron phosphate can be enhanced, and outstanding effects on reducing the viscosity of the slurry and shortening the grinding time are achieved.

This invention, entitled "A Camellia Seed Oil Microcapsule Emulsion and Its Preparation Method and Application," belongs to the field of cosmetic technology. The technical problem it aims to solve is the deficiency in existing technologies where camellia seed oil is prone to rancidity, leading to reduced stability and bioavailability of formulations. This invention provides a camellia seed oil microcapsule emulsion system that can slow down the rancidity process, thus achieving a transition from oil-soluble to water-soluble camellia seed oil. The key technical solution is a camellia seed oil microcapsule emulsion, the raw materials of which consist of camellia seed oil, sodium caseinate, chitosan hydrochloride, PE9010, and a solvent.

The application discloses a high-strength phosphogypsum roadbed material and a preparation method thereof, and relates to the technical field of roadbed materials.The method first carries out ultrasonic-assisted chelation purification on phosphogypsum, and then generates a magnesium-aluminum layered double hydroxide coating layer on the surface of the phosphogypsum through in-situ reaction, so as to realize deep passivation and stabilization of impurities.Meanwhile, graphene oxide-polymer nanohybrid reinforcing liquid is prepared, and basalt fibers are subjected to mild acid etching activation.Finally, modified phosphogypsum, slag powder, cement, activated fibers and nanohybrid reinforcing liquid and other components are mixed, stirred, pressed and formed according to a specific process and are maintained.The method remarkably improves the strength and structural stability of the phosphogypsum matrix through multi-step collaborative modification, and realizes high-value resource utilization of the phosphogypsum in roadbed engineering.

The invention belongs to the technical field of liquid fertilizers, and discloses an organic water-soluble fertilizer containing humic acid and fulvic acid as well as a preparation method and application of the organic water-soluble fertilizer. The organic water-soluble fertilizer comprises a composite humic acid matrix, urea, monoammonium phosphate, potassium nitrate, polyglutamic acid, triphenylsilanol, nano silicon, a composite microbial inoculant and disodium ethylene diamine tetraacetate by weight, wherein the composite humic acid matrix is prepared by mixing hydrothermal synergistic conversion humic acid and biochemical fulvic acid according to a ratio of (2-4): 1; the preparation method comprises the following steps: dissolving the basic components, chelating and synergistic, compounding and curing, and treating a finished product, wherein the curing temperature is controlled to be 35-40 DEG C in the compounding and curing stage. Short-term adjustment and long-term stability of soil pH can be considered, the flocculation resistance of a system and the survival rate of the microbial inoculum are improved, and when the microbial inoculum is applied to tomato and grape planting, obstacle soil conditions can be improved, crop growth indexes, stress resistance, yield and fruit quality can be improved, and the microbial inoculum is suitable for drought, saline-alkali and continuous cropping obstacle scenes.