137results about How to "Improve anti-settling performance" patented technology

The invention relates to scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating and a preparation method thereof. The method comprises the following steps of: (1) mixing scaly zinc powder with initial film forming resin according to the weight ratio of components to obtain a component A; (2) mixing a hydrolyzing silicon solution with a modifier by stirring at intermediate speed according to the weight ratio of the components, adding a catalyst for hydrolyzing according to the weight ratio of the components and hydrolyzing to obtain a component B; and (3) mixing the component A and the component B which are prepared in the step (1) and the step (2) according to the component weight ratio of (1-1.5):1 to obtain the scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating. The invention has the advantage of preparing the scaly zinc-based inorganic zinc silicate heavy anti-corrosion coating by mainly adopting domestic scaly zinc powder. Compared with traditional zinc rich primer, the invention can greatly reduce the zinc powder content and coating thickness; the traditional zinc rich primer generates large zinc fog in the coating welding process, and the scaly zinc powder primer generates less zinc fog, reduces damage to construction staffs and is a new generation product of the traditional inorganic and organic zinc rich primer.

The invention relates to a high-stability multi-phase composite electrorheological fluid and a preparation method thereof. The electrorheological fluid comprises the following structure: liquid insulating medium is taken as a base fluid, and dispersion medium is evenly dispersed in the base fluid. The high-stability multi-phase composite electrorheological fluid is characterized in that the dispersion medium is composite particles which take nanometer nickel or copper as cores and titanium dioxide as shell layers and have core-shell structures, the volume concentration of the dispersion medium is between 30 and 40 percent, and the high-stability multi-phase composite electrorheological fluid also comprises 0.05 to 3 weight percent (the total amount of composite particles and a base fluid) of sodium dodecylbenzebesuefonate at the same time. The preparation method thereof comprises the steps of: hydroxylating metal particles first, then coating titanium dioxide on the hydroxylated metal particles, and finally mixing the metal particles with the dodecylbenzebesuefonate and the based fluid evenly to obtain the high-stability multi-phase composite electrorheological fluid. Compared with the prior art, the high-stability multi-phase composite electrorheological fluid has the advantages of simple preparation method, steady performance, and good settling resistance, and the shear strength can be improved to more than 50MPa; and the use of the composite base fluid can ensure that the density of the electrorheological fluid is improved by more than 20 percent, and the stability is greatly improved.

The invention provides a two-component graphene heavy-duty anti-corrosive coating material, which comprises a component A and a component B, wherein the two-component graphene heavy-duty anti-corrosive coating material comprises the following components in percentage by weight based on 100% of the total weight of the component A: 0.2-2wt% of graphene; 10-30wt% of epoxy resin; 20-50wt% of zinc powder; 0.5-3wt% of a dispersant; 0.5-4wt% of an anti-settling agent; 0.2-1wt% of a defoaming agent; 0.2-2 wt% of a silane coupling agent; 0.3-2wt% of a thickener; 10-20wt% of a pigment filler; and 10-20wt% of a first solvent, wherein the zinc powder is a mixture of spherical zinc powder and flaky zinc powder; and the coating material comprises the following components in percentage by weight based on100% of the total weight of the component B: 50-75% of a curing agent; 1-5wt% of a curing accelerator; and 20-50wt% of a second solvent.

The invention discloses a preparation method of organobentonite modified with fatty acid amide. The method includes the following steps that bentonite, an alkyl trimethyl quaternary ammonium salt cationic surfactant with the carbon chain length of 12-16, an octadecyl trimethyl quaternary ammonium salt cationic surfactant, a fatty acid amide nonionic surfactant, ethyl alcohol and deionized water are mixed to form a mixture, then the mixture is subjected to an organizing reaction with primary organic modification or secondary organic modification, and the product is washed, centrifuged, dried and smashed to be prepared into organobentonite. Organobentonite produced with the method has a high colloidization rate in xylene and is good in settling resistance and small in particle size, wherein the colloid rate reaches 99% or above, and the scraper fineness is smaller than or equal to 10 micrometers and is uniform.

The present invention discloses a stable color-changing ink, which includes the following components in parts by weight: 10 to 60 parts of water, 0.1 to 2 parts of a pH regulator, 0.1 to 1 part of a corrosion inhibitor, 0.1 to 3 parts of a dispersant, 0.1 to 3 parts of an emulsion type lubricant, 0.5 to 10 parts of a water soluble resin, 10 to 50 parts of a microcapsule color-changing pigment, and 0.1 to 3 parts of a thickener. The present invention achieves the stability of an ink system and the stability of the writing effect, and can be used in different application fields, involving color-changing gel inks, color-changing watercolor inks, color-changing water-based inks, color-changing medium oil inks, color-changing fountain pen inks, color-changing writing brush inks, color-changing writing brush inks, color-changing inkjet inks, anti-counterfeiting inks, high-temperature disappearing inks, and other application systems.

The invention discloses a high-performance magnetorheological fluid which comprises the following components in percentage by weight: 50-80% of mixed carbonyl iron powder, 10-40% of carrier liquid, 0.5-2% of surfactant, 0.5-2% of thixotropic agent, 0.5-2% of antioxidant, 0.5-2% of solid lubricant and 0.5-2% of dispersant. Compared with the prior art, by adding a small amount of nano carbonyl iron powder into micron carbonyl iron powder, the invention can obviously improve the sedimentation stability of the magnetorheological fluid and can improve the shear yield stress of the magnetorheological fluid under a magnetic field. After standing for 1 year, the magnetorheological fluid can still show favorable sedimentation resistance and aggregation resistance. The magnetorheological fluid disclosed by the invention can be widely used in the fields of aerospace, machinery, intelligent vibration damping of vehicles or civil building structures.

The invention provides a novel anti-settling magnetorheological fluid damper. The novel anti-setting magnetorheological fluid damper comprises a shell and a piston arranged in the shell. The shell isfilled with magnetorheological fluid. Annular excitation coils are embedded into the inner and outer surfaces of the piston. An annular permanent magnet embedded into the piston is arranged on the inner side of each excitation coil. The periphery of the piston is sleeved with a magnetic conducting ring. The magnetic conducting ring is connected with the piston through a connecting rod. The magnetic conducting ring is in clearance fit with the inner wall of the shell. The damper not only can realize variable-damping semi-active control to meet the working condition application, but also can fully utilize the maximum magnetic field area originally acting in the piston shell, a traditional magnetic conductive closed-loop magnetic circuit is changed so that the damper can act on the magnetorheological fluid, the anti-settling property of the magnetorheological fluid is enhanced, and the magnetic energy heating of a cylinder barrel is reduced. By the adoption of the embedded permanent magnet design, it is ensured that the damper also has the magnetic field output under the non-current condition, the anti-settling purpose is realized through the action of a magnetic field, the service life of the damper is prolonged, and longer stability performance is maintained; and meanwhile, the embedding of permanent magnets can also make the damper perform bidirectional adjustment of magnetization and demagnetization.

An electrorheologic liquid of calcium titanate is prepared through preparing anhydrous calcium titanate micron-particles (or nanoparticles), and mixing with dimethyl silica oil. Its advantages are strong electrorheologic effect, high shear strength and structure stability, low current density and no pollution and corrosion.

A preparation method for electrorheological fluid of core-shell particle/compound base fluid belongs to the materials science and engineering technical field. The preparation method is characterized in that nickel nano-particles are pretreated by sodium hydroxide water solution so that particles are separated; the separated particles are added with tetrabutyl titanate alcohol solution so that particles are separated; the separated particles are added with mixed liquor containing organic polar molecule, deionized water and alcohol so that particles are separated and dried in the 100-120 DEG C; the dried particles are repeatedly coated for 1-2 times, thus the core-shell particles which take the nickel as the core and titanium dioxide and organic polar molecule as clad. And then the core-shell particles are added into the mixed liquor of fluorosilicon oil and dimethylsilicone fluid to prepare the electrorheological fluid. The preparation method has the effect and benefit that the electrorheological fluid obviously increases the effect of the electrorheological fluid of core-shell particle which takes the metal as the core and improves the resistance to settling thereof.

The invention relates to the technical field of dispersion liquid, in particular to a preparation method of a graphene dispersion liquid. The method includes the steps of: A. taking natural flake graphite, employing chemical redox process to prepare a graphene oxide suspension, and conducting ultrasonic treatment, washing, reduction and drying treatment to obtain graphene powder; B. mixing a solvent with the graphene powder till uniform, then conducting ultrasonic cleaning treatment, and then performing homogenizing treatment; C. adding a dispersant and a surfactant, conducting mixing to uniform, then performing ultrasonic cleaning treatment, carrying out centrifugal treatment, removing large graphene particles, and taking the supernatant, thus obtaining the graphene dispersion liquid. Thegraphene dispersion liquid obtained by the preparation method provided by the invention has good dispersibility and anti-settling performance, and also the chemical composition and physical morphology are not destructed. Therefore, the graphene dispersion liquid obtained according to the invention retains the original properties of graphene, has stronger applicability, and can be widely used forlubrication, thermal conductive composite materials and other fields.

The invention relates to preparation of a polar-molecule type electro-rheological fluid, in particular to polar carbonyl (C=O) containing dielectric particles prepared by an oxalate co-precipitation method. The size of the particles is between 5 and 5000 nm. The carbonyl containing dielectric particles are taken as a disperse phase, and insulating hydrophobic liquid of which the electrical conductivity is lower than 10 S/m and the dielectric constant is lower than 10 is taken as a dispersion medium. The electro-rheological fluid prepared by the method has the advantages of high shear/yield stress (static yield stress is about 100 kPa), small leakage current, good settling resistance and the like.

The invention relates to a modified titanium-calcium oxyoxalate electrorheological fluid, which is a suspending liquid prepared by taking modified titanium-calcium oxyoxalate with size of nanometer to micron as a disperse phase and uniformly dispersing the modified titanium-calcium oxyoxalate in silicon oil, and is characterized in that: in the process of preparing titanium-calcium oxyoxalate by a coprecipitation method, surfactants with different contents and different types are added to obtain modified titanium-calcium oxyoxalate powder with nano-scale and micron-scale distribution, therefore, not only are the appearance of the powder and the wettability of the powder and silicon oil changed, but also the yield stress of the electrorheological fluid is improved, which can reach up to 155 KPa under 5KV/mm direct-current field, the electrorheological effect is strong, and the zero-field viscosity of the electrorheological fluid is low, thus leading to high electrorheological efficiency, low cost, simple preparation process and short cycle.

The invention discloses a spiral ground pile for a construction site. The spiral ground pile for the construction site includes a ground pile, a positioning ring is further welded to an outer ring ofthe ground pile, a spiral guide groove surrounding the periphery of the outer ring is formed below the positioning ring located on the ground pile, the top of the ground pile is of an open-ended hollow cavity structure, the internal cavity of the ground pile is connected with a push column in a threaded mode, the lower part of the push column is tapered, the lower part of the push column is symmetrically provided with a plurality of T-shaped inserting columns vertically penetrating through the ground pile and inserting into a soil layer, a reset spring is arranged between the T-shaped inserting columns and the inner wall of the ground pile, bull eye ball roll balls in contact with the side wall of the lower part of the push column are arranged at one end of the lower part, near he push column, of the T-shaped inserting columns, a bearing is coaxially connected to the ground pile located above the positioning ring, and a plurality of extensible and adjustable inclined struts are hingedto a bearing outer ring. According to the spiral ground pile for the construction site, the structure is simple and novel, and load performance, stability, and settlement resistance and drawing resistance performance are good.

The invention discloses a preparation process of epoxy mica iron coating. The preparation process comprises the following steps: (1) preparing mica iron oxide powder: adding a mica iron oxide raw material into a ball mill, and grinding the mica iron oxide raw material to obtain mica iron oxide powder; (2) modifying the mica iron oxide powder: regulating the temperature of a high stirrer to 130 DEG C, preheating the high stirrer for 20 minutes, then, adding the mica iron oxide powder into the high stirrer to stir for 10 minutes, raising the temperature of the mica iron oxide powder to 80-100 DEG C, and stopping stirring, adding stearic acid of which the amount accounts for 0.4-1.5% of the weight of the mica iron oxide powder, stirring the stearic acid and reacting the stearic acid for 20 minutes; cooling to obtain the modified mica iron oxide powder; and (3) adding epoxy resin, a diluent, a dispersing agent, a flexibilizer, silicon dioxide, talcum powder, titanium dioxide and a curing agent into a stirrer to stir for 30 minutes with rotation speed of 1000r/min, adding the modified mica iron oxide powder, keeping the rotation speed unchanged and further stirring for 40-50 minutes. According to the preparation process for the epoxy mica iron oxide coating, the mica iron oxide is modified by taking stearic acid as a modifier, so that the dispersing and anti-settling performances are greatly improved; the prepared epoxy mica iron oxide coating is good in stability and long in quality guarantee period.

The invention discloses a water-permeable sidewalk surface course pavement structure and pavement method. Baffle bars which are mutually parallel and perpendicular to the road axis are fixed on a water-permeable or/and water draining roadbed surface course in a two-two spaced mode; multiple grid bars parallel to the baffle bars are arranged on the portion, between every two baffle bars, of the roadbed surface course at intervals; multiple sidewalk surface course paving blocks of which the bottom faces are attached to the roadbed surface course in a contact mode and the specifications are the same are paved between every two adjacent grid bars; elastic wedge blocks are wedged between every two adjacent surface course paving blocks clamping one grid bar. By means of the surface course pavement structure, the anti-settling capacity of a sidewalk can be improved, the situation that a water-permeable road surface is paved with drainage bricks made of an impermeable material can be achieved, the compression resistance and fracture resistance of the road surface paving blocks can be greatly improved, and the maintenance cost of the sidewalk can be reduced; the surface course paving blocks do not need to be cemented with concrete, and any surface course paving block can be taken out of the road surface for replacing when the surface course paving block is damaged; therefore, dismounting, mounting and maintaining of a sidewalk pavement are very convenient, the road surface does not need to be broken and dismounted, and a roadbed cannot be damaged.

The invention relates to electrorheological fluid of high-dielectric constant CaCu3Ti4O12 hybrid-modified particles and a preparation method thereof. A disperse phase of the electrorheological fluid is hybrid-modified CaCu3Ti4O12 partials with the dielectric constant of more than 10,000, and base fluid is chlorinated paraffin-doped and hydroxyl polar group-modified silicone oil compound base fluid. The preparation method comprises the following steps of: preparing the base fluid, namely mixing according to a ratio of 5 to 20 v percent of chlorinated paraffin, 40 to 80 v percent of chlorinatedsilicon oil and 10 to 50 v percent of dimethyl silicon oil; preparing the CaCu3Ti4O12 partials by using a sol-gel method; performing hybrid modification on the prepared CaCu3Ti4O12 partials to obtainthe CaCu3Ti4O12 compound partials, and adding the compound particles into the base fluid to obtain electrorheological fluid of which the compound particle volume concentration is 10 to 50 percent. Inthe invention, the sol-gel method and the controllable molecular synthesis technology are adopted, so that the constitution and the structure of the particles are optimized, and the electrorheological particles with high shear strength and active base fluid with high electrorheological strength are obtained; and the prepared electrorheological fluid has high shear strength and high comprehensive performance.

The invention relates to the technical field of ink processing, and particularly relates to a light-fast and oxidation-resistant ink composition for a writing pen. The ink composition is prepared fromthe following components: a coloring agent, a bright pigment, water-soluble resin, thermoplastic polyurethane resin, dextran, fucoidan, polycarbodiimide, an organic solvent, a stabilizer, a corrosioninhibitor, a lubricant, a preservative and water, wherein the organic solvent is a mixture formed by compounding propylene glycol, diethylene glycol and isopropanol according to a mass ratio of 1 to1 to 5; the lubricant is glycerol or polyether modified silicone oil; and the preservative is a mixture of mannan and propyl p-hydroxybenzoate according to an equal mass ratio. The ink composition hasthe advantages of being good in writing performance, high in stability, outstanding light-fast and oxidation-resistant performance and little possibility of color fading.

The invention relates to kaolin/TiO2 nanotube composite particle electrorheological fluid materials, compared with the conventional materials, the prepared electrorheological liquid discontinuous phase material has unique structure and a shape similar to cactus, wherein the porcelain clay is used as the base stock, the TiO2 nanotube is distributed onto the surface of the porcelain clay. The structure can be applied for improving the dielectric property and electrical conductance of the material.

The invention relates to a water-based polishing solution, and belongs to the field of polishing. The invention discloses a water-based polishing solution. The water-based polishing solution is composed of a magnetorheological fluid and a grinding material, the magnetorheological fluid is composed of, by mass, 30-80% of water, 3-8% of a thixotropic agent, 0-5% of a dispersing agent, 0-5% of a wetting agent and 20-70% of carbonyl iron powder, and the mass ratio of the grinding material to the magnetorheological fluid is (1-2):10. The invention provides a water-based polishing agent. The polishing agent is composed of the magnetorheological fluid base solution and the grinding material, the thixotropic agent used by the magnetorheological fluid is provided by a method, the SiO2 nanoparticlethixotropic agent prepared by the method provided by the invention takes magnetic SiO2 nanoparticles with a core-shell structure as a main raw material, the thixotropic agent has certain magnetism, and the corresponding magnetism is relatively weak due to relatively small magnetic core.

The invention belongs to the field of thermal insulation coatings and in particular relates to a waterproof crack-resistant external wall thermal insulation coating and a preparation method thereof. The waterproof crack-resistant external wall thermal insulation coating is prepared from the following components: 30-60 parts of film-forming resin emulsion, 20-30 parts of hollow glass beads, 5-10 parts of expanded perlite, 5-8 parts of sepiolite powder, 6-8 parts of talcum powder, 5-10 parts of mica powder, 6-8 parts of kaolin, 15-20 parts of titanium dioxide, 5-10 parts of wood fibers, 4-6 parts of foamed fibers, 10-30 parts of sodium silicate, 3-5 parts of organosilicone, 1-2 parts of methylcellulose, 2-4 parts of coalescing agents, 1-2 parts of an antifoaming agent and a proper amount of water. The coating disclosed by the invention is good in thermal insulation effect and high in bonding strength and has water resistance and crack resistance, and a waterproof layer and a protective layer are not needed.