64results about How to "Particle stabilization" patented technology

Into calcium hydroxide emulsion of 10-12 wt% concentration and at 20-25 deg.c, compound crystal form controlling agent is added while stirring, and then the mixture is transferred into a bubbling carbonating tower for carbonization for 50-70 min while introducing CO2 gas in the rate of 50-80 1/min. Kg calcium hydroxide and cold water to control the temperature not higher than 60 deg.c until the pH value being reduced to 7-8. Through the one-step carbonization process, cubic calcium carbonate of 80-100 nm size is prepared. The said process is suitable for use in industrial production and has low production cost and high production efficiency, and the product has excellent dispersant characteristic and may be widely used, especially in producing silicon rubber product.

The invention provides a multicolor water-in-water primer-topcoat coating and a preparation method thereof. The coating comprises disperse-phase color matching basic paint, a protection glue solution and continuous-phase colored paint in the weight ratio being (30-40): (30-40): (20-30). According to the multicolor water-in-water primer-topcoat coating, colored primer is not required to be applied in advance, a multicolor continuous coating with a stone-simulating effect can be obtained only through one-time spraying, and the coating is an ideal alternative of decorative stone materials such as marble, granite and the like. The coating is an all water-based product, contains few VOCs (volatile organic compounds), doesn't contain APEO (alkylphenol ethoxylates), is environment-friendly and free of pungent smell and has excellent weather fastness, and the performance of the product meets the requirements of the HG/T4343-201 water-based multicolor building coating standard.

The invention relates to a nanometer calcium carbonate composite concentrated master batch and a preparation method thereof. The concentrated master batch is prepared from 15 to 40 parts of carrier resin, 20 to 80 parts of nanometer calcium carbonate, 1 to 3 parts of a coupling agent, 1 to 3 parts of a dispersing agent and 1.5 to 3.5 parts of a lubricating agent. During preparation, the prepared raw materials are mixed by a high-speed mixing machine and subjected to banburying by an internal mixer sequentially, and then are fed into a single (double) screw extruder by a feeding machine and extruded to prepare the concentrated master batch. The nanometer calcium carbonate composite concentrated master batch prepared by the invention can greatly reduce the product cost and improve the product quality, has high compatibility, can improve the flowability, as well as the dimensional stability and the heat resistance of the product, has an anti-ageing effect, and can effectively improve the rigidity, the toughness, the bending modulus, the surface finish quality and the like of the material.

The invention relates to a preparation method of a hydrogenation catalyst for nitrobenzene and its derivatives. A carbon material is functionally modified with a high-molecular polymer and then loadedwith noble metal. The preparation method of the catalyst comprises the following steps: (1) the carbon material and the high-molecular polymer undergo ultrasonic treatment on in a certain concentration of a salt solution at a certain temperature for 0.5 to 6 hour to obtain a functionalized carbon material; (2) noble metal particles with a certain size distribution are prepared from the salt solution of the noble metal under the action of a protective agent and a reducing agent; (3) the aqueous solution or the organic solution of the obtained noble metal particles undergoes ultrasonic treatment for 10 min and is stirred for 2-12 h and then loaded on the functional group modified carbon material so as to obtain a noble metal-loaded catalyst. The preparation method of the catalyst is simple,effective and green and environmentally-friendly. After reduction by the reducing agent, the uniformly-dispersed noble metal-loaded catalyst with a certain size distribution is obtained. In addition,the catalyst has a broad application prospect in the field of catalysis of nitrobenzene and its derivatives.

The invention discloses activation of brown coal humic acid and a preparation method of slow-release coated organic fertilizer thereof. Oxidation of brown coal is conducted through nitric acid, so that the content of the brown coal humic acid, the number of carboxy group on the surface and the adsorptivity to ammonium ion are improved; biological activation of the brown coal humic acid is conducted through zymin, so that the the brown coal humic acid is degraded into small molecular; by means of ammonium hydroxide, a series of reactions such as condensation, oxidation and degradation are conducted, so that nitridation and dissolution of the brown coal humic acid are conducted; proportioning of the brown coal humic acid after nitridation and dissolution, organic composted fertilizer and inorganic fertilizer are conducted to obtain granules, and the granules are coated by a coating agent made from gelatin, CMC-Na, zeolite powder and soybean oil. According to the method, not only is the slow-release performance of the organic fertilizer improved, but the fertilizer granules are stable, moisture-resistant, easy to transport and of low cost; the use ratio of the brown coal is effectively improved, the brown coal humic acid is degraded into small molecular, the hydrophilia is improved, the fertilizer efficiency is significantly improved, technology is simple, the cost is low, and large-scale production can be conducted.

The invention relates to the field of building materials and the field of water conservancy construction, in particular to various clay, weathered granite soil and hoggin soil. Soil at construction sites of artificial lakes, artificial canals and irrigation channels is used as main materials, special macromolecular coagulant, limestone or gravel sandy soil are mixed with Portland cement, and compression molding equipment is used for once forming of seepage-proofing bricks. The main materials include, by weight, 0.02 part of coagulant, 0.2 part of glass fiber chopped strands (biological straws), 70-80 parts of soil, 5-6 parts of cement and 10-15 parts of gravels (weathered granite soil). In terms of performance, the seepage-proofing bricks made by the method have sufficient compressive strength and shear resistance and can meet the normal artificial water conservancy seepage proofing requirements; in terms of process, operation is simple and easy and soil is taken in situ; and in terms of cost, the cost is at least 50% lower than that of cement mortar seepage proofing, soil needed to be removed at the construction sites is treated, construction cost is reduced, and construction cycle is shortened.

The invention relates to a preparation method for realizing the micro-encapsulation of a core material by an acoustic surface wave atomizer in the technical field of micro-encapsulation. The preparation method comprises the following steps: obtaining resonant frequency of the acoustic surface wave atomizer through formula I; placing a core material emulsion on the acoustic surface wave device, staring a pump to operate, charging hot water from a hot water inlet and discharging the hot water from a hot water outlet, starting the acoustic surface wave atomizer to work, producing atomized particles of the core material emulsion, and moving the particles in an internal tube toward the direction where the pump is positioned; and introducing the atomized particles of the core material emulsion into a flocculant, carrying out reaction, and completing the micro-encapsulation process. The method is used for atomizing the core material emulsion through the acoustic surface wave atomizer and forming a great number of core material emulsion particles once. The method can also obtain microcapsules with various particle sizes by changing the resonant frequency of the SAW atomizer; the minimal particle size of the microcapsules produced by the method reaches 50 mu m; and the method greatly improves the speed of producing the core material emulsion particles and the efficiency of producing the microcapsules.

An optical composition is provided, comprising: —a polysilsesquioxane comprising repeating units of the formula [R—SiO_1.5], wherein each R independently is hydrogen or a C₁-C₁₂ alkyl, aryl, alkene, arylene, alkenyl or alkoxy; —a polysiloxane, optionally substituted; and —particles dispersed in said polysiloxane. The polysilsesquioxane is able to disperse the particles in the polysiloxane, thus providing an optical composition comprising stably dispersed particles. The particles may be utilized to tune the refractive index or another optical property of the composition. Due to the low organics content, the composition has reduced risk of yellowing. The invention also relates to a bonding layer comprising an optical composition, an optical system comprising an optical composition, a method for preparing an optical composition and an optical system, respectively, and the use of a polysilsesquioxane for dispersing particles in a polysiloxane material.

The invention discloses an enzyme-linked immunosorbent assay (ELISA) detection kit for detecting ractopamine as well as a preparation method and the application of the detection kit. The detection kit is characterized in that Fe3O4@beta-CD is taken as a capture probe, and a compound of colloidal platinum particles and polymerase chelate PV is taken as a signal probe; the preparation method of the detection kit comprises the steps of preparing Fe3O4-NH2; preparing the capture probe Fe3O4@beta-CD; preparing PtNPs; preparing a PtNPs/ PV signal label; and preparing an immune complex. The application comprises the following steps: feeding 50mu L of liquid A and 50mu L of liquid B of diaminobenzidine (DAB) into the obtained immune complex; carrying out light-avoiding incubation for 15-30 minutes; measuring the absorbance of the obtained DAB developed product by a microplate reader; drawing a standard curve according to the relation between corresponding light absorption values and concentrations of the ractopamine; and determining the concentration of the ractopamine in a sample to be tested according to the standard curve. The detection kit has the advantages of being high in sensitivity, selectivity and accuracy as well as rapid in detection speed.

The invention discloses a preparation method of an epinastine hydrochloride fine granule. According to the preparation method, a composite flavoring agent is prepared from aspartame, sucralose, and glycyrrhizic acid monoammonium S at a mass ratio of 8:1:1, a sweet filler is taken as an assistant agent, and synergistic effect is achieved via adding an appropriate amount of an essence, so that the bitter taste of epinastine hydrochloride is covered effectively, and patient drug compliance is improved. According to the preparation method, problems that epinastine hydrochloride fine granule particle size distribution range is relatively wide, and much particle fine powder is generated are solved effectively via controlling on parameters such as adhesive aqueous solution concentration, fluidized bed temperature, and drying time, and stable and uniform granules are obtained. The auxiliary materials of the preparation method are cheap and easily available; preparation is simple; no special equipment is needed; production cycle is short; cost is low; and the preparation method is suitable for industrialized production.

The invention discloses a resource utilization method by using biological power plant waste, and relates to the technical field of biological power plant waste utilization. The biological power plantwaste is processed into a soil improvement agent, wherein the soil improvement agent comprises the following components in parts by weight: 15-25 parts of animal manure, 10-15 parts of straw, 3-4 parts of zeolite, 5-6 parts of bentonite, and 2-3 parts of vermiculite, the pH value being adjusted to 6.0-6.5. The method has the following advantages: through mutual cooperation of the animal waste, theplant straw, the bentonite, the zeolite and the vermiculite system, the toxic action of heavy metals can be effectively inhibited, the effectiveness of trace elements in soil is improved, the nutritional environment of crop roots is improved, the soil structure and the water retention property are effectively improved, and the continuity of the soil improvement effect of the soil conditioner is guaranteed.

The invention discloses a laboratory bacterium immobilization method. The method solves the problem that the existing method has a low embedding amount of bacteria, causes poor bacterium immobilized particle stability and utilizes a continuous reaction system difficult to be operated for a long time. The method comprises 1, culturing bacteria to obtain a bacterium liquid, 2, centrifuging the bacterium liquid to obtain immobilized bacteria, 3, dispersing the bacteria through physiological saline, adding a polyvinyl alcohol solution into the dispersion liquid and carrying out mixing to obtain a PVA-bacterium mixed solution, 4, carrying out immobilization through a bacterium immobilization reactor to obtain bacterium immobilized particles, and 5, putting the bacterium immobilized particles into ice water and carrying out standing. The method significantly improves the bacterium embedding amount of the immobilized particles to 15 to 20 g/L, can be well molded, is not broken and does not produce bonding. The immobilized particles have good stability. When the bacterium immobilized particles are used in a continuous fermentation system, the system is stable for at least 2 months. The method is used for bacterium immobilization.

The invention discloses a viscoelastic surfactant type sand-carrying fluid which is prepared by the following steps: reacting xanthan gum with a hydrophobic cation bond etherification reagent, and forming a reversible network structure from the modified xanthan gum through electrostatic interaction and hydrophobic association, thereby greatly enhancing the apparent viscosity and the grid structureof the modified xanthan gum; synthesizing a betaine ampholytic surfactant by taking a rosin derivative as a raw material, and carrying out combined copolymerization on the betaine ampholytic surfactant, acrylamide, acrylic acid and N, N-diallyl oleamide to obtain a modified surfactant; using the silane coupling agent for grafting positively charged amino on the surface of the porous ceramic, using succinic anhydride for ring opening to convert the amino into negatively charged carboxyl, and the rock and the propping agent are negatively charged and are subjected to electrostatic repulsion sothat the modified propping agent mixture is better dispersed in the sand-carrying fluid, and the fracturing effect is greatly improved. Reaction conditions are mild, raw materials are cheap, a synthetic route is simple, and sand carrying capacity, salt resistance, temperature resistance and shearing resistance are greatly improved.

The invention discloses a high-internal-phase switching emulsion with stable particles, a preparation method, application and a particle recovery method. The high-internal-phase switching emulsion with stable particles comprises a dynamic covalent bond surfactant, an oil phase, particles and alkali liquor, wherein the particles and the dynamic covalent bond surfactant generate an electrostatic repulsion effect. The dynamic covalent bond surfactant, the particles and the alkali liquor form an aqueous phase, the proportion of the aqueous phase is 18-25 wt%, the proportion of the oil phase is 75-82 wt%, and the pH value of the high internal phase switch emulsion with the stable particles is larger than or equal to 12. The stable-particle high-internal-phase switch emulsion has good stability, can realize rapid demulsification when the pH value is adjusted to be less than or equal to 4.5, and is beneficial to particle recovery.

The invention discloses a novel external pressure circulatory assist. The external pressure circulatory assist comprises shank airbags, thigh airbags and hip airbags. The airbags are communicated withan air storage tank and an air compressor through solenoid valves, the air storage tank is communicated with an electric pressure regulating valve and a muffler, the airbags are further communicatedwith a negative pressure tank through solenoid valves, and the negative pressure tank is communicated with the air compressor. The external pressure circulatory assist has the advantages of being highin stability and long in service life.

The invention relates to a method for preparing a solid particle emulsifier by compounding a random copolymer with a homopolymer. The method comprises the following steps: 1, synthesizing an amphiphilic random copolymer; 2, synthesizing a hydrophobic homopolymer; and 3, respectively adding the amphiphilic random copolymer and the hydrophobic homopolymer into a cosolvent, adding a precipitation agent to self-assemble in order to form micelles with uniform size, and freezing the micelles in a large amount of deionized water. The particles of the assembled micelles prepared in the invention are stable, and have small particle size of 30-200[mu]m. The micelles have a good emulsifying effect as a particle emulsifier.

An electrically heated planar cathode for use in miniature x-ray tubes may be spiral design laser cut from a thin tantalum alloy ribbon foil (with grain stabilizing features). Bare ribbon is mounted to an aluminum nitride substrate in a manner that is puts the ribbon in minimal tension before it is machined into the spiral pattern. The spiral pattern can be optimized for electrical, thermal, and emission characteristics.