32results about How to "Play the role of skeleton support" patented technology

The invention discloses a high-strength polysaccharide aerogel microsphere, and a preparation method of the high-strength polysaccharide aerogel microsphere, which are mainly used in the field of chromatographic separation. According to the preparation method, firstly a difunctional cross-linking agent is used to modify a polysaccharide material, then the polysaccharide material is mixed with a material not modified, and the mixture is emulsified into a sphere, and activated at the later stage to achieve crosslinking in the microsphere. The modified polysaccharide chain forms a covalent cross-linking bond in an aerogel fiber bundle and between the aerogel fiber bundles, so that the mechanical strength of the aerogel microsphere is greatly improved; the polysaccharide chain not modified contains a large quantity of hydroxide radicals so as to be good for the formation of a hydrogen bond in the gelation process and play a role of skeleton supporting, then a macropore network structure formed through aerogel solidification is kept, and the shrinkage and the deformation of the microsphere are effectively avoided. The aerogel microsphere not only has an excellent property of the natural polysaccharide, but also has a remarkable advantage on the skeleton rigidity and operation flow rate, and is therefore an ideal industrial chromatographic separation filler.

Provided is a powder stirring tank with a simple structure and raising the stirring efficiency. The powder stirring tank comprises a stirring tank, a stirring shaft and stirring blades. The stirring shaft is arranged in the center of the stirring tank vertically. The stirring blades are arranged at the lower end of the stirring shaft. Elastic projections are distributed on the inner wall uniformly. A heavy bob is movably arranged on the surface of the stirring tank. The stirring shaft has a hollow holding cavity. A plurality of telescopic elastomers are distributed on the surface of the stirring shaft uniformly. Through holes communicated with the elastomers are arranged in the side wall of the stirring shaft. The upper end of the stirring shaft is communicated with a gas source. The stirring quality is raised greatly, powder is mixed uniformly after stirring, the quality is fine, the structure is simple and usage is convenient.

The invention relates to a heat insulating material used for an aqueduct and a preparation method thereof. The heat insulating material used for the aqueduct is characterized in that the material is made by mixing and stirring dry mixture and water, the mass ratio of the water to the dry mixture is between 1.1:1 and 1.2:1; the dry mixture consists of cement, vitrified hollow beads, sepiolite fiber, siliceous dust, cement-based capillary crystalline material, waste rubber powder, re-dispersible emulsion powder and hydroxypropyl methyl cellulose; and the mass percentage of the raw materials of the dry mixture are: 35 to 54.9 percent of the cement, 35 to 54.9 percent of the vitrified hollow beads, 2 to 8 percent of the sepiolite fiber, 3 to 6 percent of the siliceous dust, 1 to 4 percent of the cement-based capillary crystalline material, 3 to 6 percent of the waste rubber powder, 1 to 5 percent of the re-dispersible emulsion powder and 0.1 to 0.5 percent of the hydroxypropyl methyl cellulose. The heat insulating material has the characteristics of low water absorbing rate, high cohesional strength and compressive strength, good anti-cracking ability and good stability.

The invention provides an atomization assembly for an electronic cigarette, a preparation method of the atomization assembly and an electronic cigarette. The atomization assembly comprises a porous body and a heating material layer; the porous body is used for absorbing aerosol to form a substrate; the heating material layer is combined to at least one part of the surface of the porous body; the heating material layer is formed by a composite material comprising a ceramic material and an electric heating metal material, wherein the ceramic material and the material forming the porous body have at least one same material component. According to the atomization assembly, the heating material layer prepared by compounding the ceramic material and the electric heating metal material is adopted, and the ceramic material plays a role in framework supporting, so that on one hand, the electric heating metal material is prevented from permeating or filling the pore channels of the porous body, and the permeability of the pore channels of the porous body is kept to a certain extent; on the other hand, the form of the heating material layer and the uniform stability of resistance are improved.

The invention relates to a thrombus extraction stent, a thrombus extraction device and a thrombus extraction system. The thrombus extraction stent comprises rigid units and flexible units which are alternately connected. Each rigid unit and each flexible unit are of a tubular structure which can be compressed and expanded in the radial direction. When the same axial force is applied, the flexibleunits are easier to axially compress compared with the rigid units. When the flexible units are axially compressed, the radial sizes of the flexible units are synchronously increased; and the maximumradial size of the axially compressed flexible units can be greater than the radial size of the rigid units. The rigid units are used for supporting, a blood flow channel can be rapidly established when the stent is unfolded, and the pre-dredging function is achieved. When the flexible units are compressed in the axial direction, interval spaces surrounding the rigid units can be formed between the adjacent flexible units, thrombus located in the interval spaces are not cut by the thrombus extraction stent, the integrity of the thrombus is kept, the risk of thrombus disengagement is reduced inthe withdrawing process, the thrombus taking-out success rate is increased, and the thrombus capturing capacity is further improved.

The invention belongs to the technical field of high polymer materials, and particularly relates to a fire-resistant silica gel material and a preparation method thereof. Sodium bicarbonate and gelatin are combined, aluminum sulfate is dissolved in an outer agar layer, and a multi-layer structural body is prepared; further, when the exterior of the functional silk yarn formed by coating is heated, the functional fiber inner layer is dissolved first along with the transfer of the temperature; then, gelatin is mixed with sodium bicarbonate and calcium hydroxide, and agar is slowly dissolved along with continuous rising of the temperature; in the slow dissolution process of the agar, an aluminum sulfate solution and a sodium bicarbonate solution in an agar layer are subjected to a double hydrolysis reaction, and a large amount of carbon dioxide is released; the carbon dioxide enables internal calcium hydroxide to be condensed into calcium carbonate, the calcium carbonate is adsorbed on the surfaces of the fibers, then the hardness of the fibers is enhanced, a framework supporting effect is achieved; meanwhile, impact of the carbon dioxide has a hindering effect on combustion of flames, and therefore, the prepared silica gel material has good flame retardance and fire resistance.

The invention relates to the technical field of preparation of lithium ion battery electrode materials, and particularly discloses a preparation method of a doped Li4Ti5O12 anode material. According to the method, a Li source, nano-silica and glucose in certain material ratio are added to a ball mill and subjected to ball-milling with absolute ethyl alcohol as a medium, then a product is subjected to spray-drying and calcined under the condition of inert atmosphere, and a product is subjected to ball-milling and sieving to obtain the doped Li4Ti5O12 anode material. The doped Li4Ti5O12 anode material shows excellent electrochemical performance when applied to a lithium ion battery anode material. The preparation process is simple, and the prepared anode material has high reversible capacity, high-rate cycle performance and excellent rate charge and discharge performance.

The invention provides a method for producing a graphite-enhanced-metal-based compound material preform through in-situ solidification of silica aerogel. The method for producing the graphite-enhanced-metal-based compound material preform through in-situ solidification of the silica aerogel comprises the steps of stirring graphite subjected to alkali wash and acid wash, tetraethyl orthosilicate, isopropyl alcohol, N,N-dimethylformamide, deionized water, hydrochloric acid and ammonium hydroxide evenly to obtain slurry; injecting the slurry into a mould, and conducting demoulding on the mould after congelation to obtain a preform; and heating and sintering the preform to obtain the porous preform. The method for producing the graphite-enhanced-metal-based compound material preform through in-situ solidification of the silica aerogel is short in production cycle and low in energy consumption, and the graphite preform which is high in mechanical strength and even in pore distribution and capable of being subjected to near net-shape forming can be produced.

The invention discloses castable and particularly relates to castable for a blast furnace slag spout. The castable for the blast furnace slag spout is prepared by mixing raw materials in parts by weight as follows: 31-33 parts of corundum slag with the particle size ranging from 5 mm to 10 mm, 45-55 parts of corundum slag with the particle size ranging from 2 mm to 5 mm, 15-28 parts of corundum slag with the particle size ranging from 0.045 mm to 2 mm, 10-15 parts of corundum slag with the particle size smaller than 0.045 mm, 4-6 parts of aluminum oxide, 2-4 parts of silicon carbide, 4-5 parts of heat-resistant steel fibers and 0.05-0.15 parts of a water reducing agent. The castable for the blast furnace slag spout is low in cost and long in service life.

The invention discloses a combined multifunctional accessory of a grouting sleeve for steel bar connection and a combined use method. The combined multifunctional accessory comprises a rubber plug, a middle column body part and a rubber column which are connected in a combined mode. A metal lining is arranged in the end, close to the middle cylinder part, of the rubber plug, and a plurality of buckles are arranged on the exposed part of the metal lining and arranged in the first end of the middle cylinder part in a clamped and sleeved mode. A boss is arranged at the end, close to the middle column body part, of the rubber column and connected into the second end of the middle column body part through threads. The end where the rubber column is located is sleeved with a positioning screw rod with a pressing check ring, the positioning screw rod penetrates through the rubber column and the boss and extends into the middle column body part, and the exposed part of the positioning screw rod is detachably sleeved with a gasket and a locking nut. The rubber plug can be replaced at any time in the splitting structure, and is convenient to mount and easy to split.

The invention relates to a special filler applied to metal smelting. The filler is prepared by mixing and molding pulverized coal and metal mineral powder and removing moisture and volatile components through anaerobic pyrolysis, is a molded material consisting of fixed carbon, ash and metal mineral powder, can be used for smelting coke in a traditional smelting process, and plays a role of a strong reducing agent and a skeleton support.

The invention discloses a porous spherical carbon adsorption material with blood compatibility, and belongs to the technical field of material preparation. The porous spherical carbon adsorption material is composite carbon spheres; the composite carbon spheres are formed by self-assembling single-layer or multi-layer hollow carbon microspheres under the action of a binder. The multi-level pore structure is as follows: a first-level pore structure is micron-level radial pore channels leading to the interior of the spheres from the surfaces of the composite carbon spheres; the second-level pore structure is submicron-level pore structures connecting the macropore channels in the composite carbon spheres; the pore walls of the first-level pore structure and the second-level pore structure are formed by compounding the hollow carbon microspheres and the binder; the third-level pore structure is a nano-scale pore structure of the hollow carbon microspheres forming the composite carbon spheres. The porous spherical carbon adsorption material has good adsorption performance on various adsorption substances, especially has unique and excellent adsorption performance on medium and macromolecular toxins, has good blood compatibility, and has good application prospects in the adsorption fields of blood purification, water treatment and the like.

The invention discloses a solar heat reflective thermal insulation coating and a preparation method thereof. The coating comprises the following components: an adhesive, hollow glass beads, a wetting dispersant, a defoaming agent, an antifreeze agent, a coalescing agent, a thickening agent, a pH regulator, a pigment filler and water. The modified xanthan gum treated by the alternating copolymer of 1-octadecene and maleic anhydride is adopted to modify the silicon dioxide aerogel, so that the compatibility between the silicon dioxide aerogel and the acrylic emulsion is improved, the heat-insulating property and the stain resistance of the coating are improved, and the coating can be used as a reflective heat-insulating coating for building exterior walls, and can be used as a reflective heat-insulating coating for building exterior walls. And energy conservation of buildings can be realized.