492results about How to "Reduce the interaction force" patented technology

Featured is a medical instrument driver, a robotic apparatus embodying such a medical instrument driver and methods related thereto for inserting a medical instrument into tissue of a mammal (e.g., human). Such medical instruments include medical needles, biopsy needles, trocars, cutters and introducers. Such a medical instrument driver according to the present invention is configured and arranged so that medical instrument is rotated as it is being moved longitudinally for insertion into the tissue such that the medical instrument is spiraling as it pierces and traverses the tissue to the target area.

The invention discloses an organic compound based on heteroaryl amine structure and application thereof to an OLED (Organic Light Emitting Diode). The compound structurally contains heteroaryl and benzo-heteroaryl amine structures at the same time, has relatively shallow LUMO energy stage, relatively high glass transition temperature and molecular thermal stability; the absorption in the visible light field is low; the refractive index is high; after the organic compound is applied to the CPL layer of the OLED device, the light extraction efficiency of the OLED device can be effectively improved.

The invention provides an aluminum oxide based hydrorefining catalyst as well as a preparation method and application thereof. The method comprises the following steps: 1, immersing active metal components into an aluminum oxide carrier, and drying and roasting to obtain an active metal component loaded catalyst; and 2, introducing an organic complexing agent into the active metal component loaded catalyst and drying to obtain the aluminum oxide based hydrorefining catalyst, wherein the aluminum oxide carrier comprises delta-Al2O3 or theta-Al2O3. The aluminum oxide based hydrorefining catalyst provided by the invention can be used for FCC diesel oil so that the yield of the FCC diesel oil is higher than 99%, the content of sulfur is lower than 10ppm, and China 5 standard requirements are met.

The invention relates to a viscosity modifier for high or ultrahigh-strength concrete. The viscosity modifier comprises the following substances in percentage by weight: 2-10% of silica fume, 10-20% of pulverized coal ash, 2-3% of exciting agent and 67-86% of ultrafine powder. The viscosity modifier added into the high or ultrahigh-strength concrete at a ratio of 10-30% can reduce the viscosity of the concrete by 25-60%. By optimizing the particle size distribution of cementitious materials, the bulk density can be increased, the thicknesses of water film layers on the surfaces of particles in a cementitious system can be increased, the adsorption efficiency of a water reducing agent can be improved, the use amount of the water reducing agent can be reduced, and the viscosity of an aqueous solution in concrete can be lowered. Due to the morphology of powder particles and the action of charges on the surfaces of the powder particles, the interaction force of the particles can be reduced, the viscosity of the concrete can be lowered, and the strength of the concrete can not be affected. The viscosity modifier can be also used for a mortar system with low water-cement ratio.

The invention relates to the technical field of organic photoelectric materials, and in particular, relates to an organic compound, an electronic element containing the same and an electronic device.The compound has a structure represented by a chemical formula 1', wherein one of R1, R2, R3 and R4 is a group defined in the specification, and the other three are selected from substituents such asalkyl, halogen and cyano; one of R5, R6, R7 and R8 is a group defined in the specification, the other three are selected from substituents such as alkyl, halogen and cyano, Y and Y1 are respectively and independently a group defined in the specification, and L and L1 are single bonds, aryl, heteroaryl and the like. By using the organic compound in an electronic component, the driving voltage, luminous efficiency, and life of the electronic component are improved.

The invention discloses heteroaryl amine structure based organic compounds and applications thereof. The structure of the organic compounds simultaneously comprises different types of heteroaryl groups and amino groups. The organic compounds have a low LUMO energy level, a high glass transition temperature, and high molecular thermal stability, have low absorption and a high refractive index in the visible light range, and can effectively improve the light emission efficiency of an OLED device, after being applied to the CPL layer of the OLED device.

The invention discloses a preparation method for a composite material of cellulose nanofiber and reinforced polyurethane. The method comprises the following steps: 1) pretreating in a chemical method; 2) unfastening fibers in a mechanical method. According to the invention, chemical treatment and mechanical treatment are adopted to separate the cellulose nanofiber, which has a high length diameter ratio and is used for reinforced polyurethane, from newspaper; the transparent nano composite material with high-intensity is prepared; wood meal and newspaper are adopted as raw materials to prepare cellulose nanofiber through the chemical treatment combined with the mechanical treatment; the diameter range of the cellulose nanofiber is 30-100 nm, and the length diameter ratio is higher than 1000.

The invention relates to polyimide containing a benzimidazole unit and a preparation method thereof. The polyimide has the following structural formula. The preparation method comprises the following steps of: firstly, performing the reaction on 2,6-disubstituted aniline and aldehyde under the acidic condition to generate a diamine compound 3,3',5,5'-tetra-substituted aromatic diamine; and then, after mixing the synthesized aromatic diamine and a heterocyclic diamine monomer 6-aminophenyl-2-aminobenzimidazole according to a certain ratio, performing the reaction on the mixture and a dianhydride monomer in an organic solvent to obtain the polyimide. The polyimide provided by the invention has excellent solubility property, can be dissolved in conventional solvents such as NMP (N-methyl-2-pyrrolidone) and DMAc (dimethyl acetamide), has excellent heat resistance and mechanical property and has excellent thermal properties of glass-transition temperature of over 410 DEG C, decomposition temperature of over 500 DEG C and the like.

The invention discloses a fluorine-containing functional diamine monomer with a large conjugated structure as well as a synthesis method and an application thereof. The synthesis method comprises the following steps of: firstly allowing di-halogenated fluorine to react with halogenated nitrobenzene, linking halogen atoms with other chemical groups to form a large conjugated system, and finally reducing binitro into diamine; or firstly carrying out a chemical coupling reaction between two active hydrogen atoms in fluorine to form the large conjugated structure, carrying out a Suzuki reaction on the large conjugated structure and two halogen atoms to obtain the diamine, and finally obtaining the novel fluorine-containing functional diamine monomer. By means of the specific structure of the diamine monomer, the polymer obtained by the diamine monomer has the advantage of good solubility, and the diamine monomer and the polymer can also achieve certain photoelectric properties; and the synthesis method has the advantages of simple process and easy purification procedure, thus being applicable to industrial production. The fluorine-containing functional diamine monomer has obvious characteristics of luminescence aggregation and induction, thus the diamine monomer can be used for synthesizing high-performance functional polymers such as polyamide, polyimide, polyamideimide, polyesterimide and the like.

The invention belongs to the technical field of catalytic coal gasification catalysts and provides a high-efficiency catalytic coal gasification catalyst prepared from a low-price halide ion metal salt and application thereof. According to the catalyst, the low-price halide ion metal salt serves as a precursor of the catalyst, a pH value regulator is adopted, active metal components are uniformly loaded on a coal base by virtue of an ion exchange technology, the active components are dispersed at an atomic scale, and corrosion of the halide ions to the reactor material is avoided. The catalyst prepared by the invention is applied to a fixed bed reactor for preparing natural gas by virtue of mild catalytic coal gasification, so that the conversion rate of converting the coal into gaseous products can be effectively improved, the composition of the coal gas can be changed, the content of methane is improved, and the coal utilization rate is greatly improved.

The invention discloses diamine monomer containing diphenylamine-fluorene, a preparation method and the application of same in polyimide preparation and belongs to the technical field of organic compound preparation. The monomer is N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene. A synthetic method comprise the following two steps that 1, under the action of cesium fluoride, 2 amino-9, 9-dimethyl fluorene and p-fluoronitrobenzene are subjected to nucleophilic substitution, and the N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene is obtained; then Pd/C serves as a catalyst and hydrazine hydrate serves as a reducing agent, and the N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene is obtained. According to the application, the N, N-dual (4-aminophenyl)-9, 9-dimethyl fluorene diamine monomer is involved into reaction with various dianhydride, and polyimide is obtained through the preparation. According to the diamine monomer containing the diphenylamine-fluorene, the preparation method and the application of same in polyimide preparation, by means of the structure peculiar to the diamine monomer, obtained polymer has good solubleness, and the unique photoelectric property is achieved; the diamine monomer and the polyimide obtained with the diamine monomer have vast application prospect in such fields as electroluminescence, cavity transmission and electrochromism.

The invention discloses an intelligent magneto-rheological deceleration strip. The intelligent magneto-rheological deceleration strip comprises a deceleration strip, a spring, a connecting shaft I, a connecting shaft II, a working panel, a driven friction plate unit, a drive friction plate unit, an annular magnet, an annular magnet yoke, a wire winding, a magneto-rheological fluid, and a control module; a square elongated slot is opened in a lane speed limit area perpendicular to the length direction of the lane; a rectangular tank filled with the magneto-rheological fluid is placed inside the square elongated slot; the working panel which is provided with strip-type through holes and the drive friction plate unit on the surface thereof is placed inside the rectangular tank; the upper and lower surfaces of the working panel are further respectively fixed with the connecting shaft I and the connecting shaft II; the other end of the connecting shaft I is connected with the deceleration strip; the other end of the connecting shaft II is wrapped with the wire winding and inserted into the annular magnet and the annular magnet yoke inside a circular blind hole at the bottom of the square elongated slot. The intelligent magneto-rheological deceleration strip can automatically adjust the rigidity of the deceleration strip based on the car speed, thereby decelerating a high-speed car, whereas letting a low-speed car pass through comfortably. The intelligent magneto-rheological deceleration strip is simple in structure and good in economical efficiency.

The invention provides an asphalt reclaiming agent, and belongs to the technical field of road engineering. The asphalt reclaiming agent, provided by the invention, is prepared from the following components in parts by weight: 30 to 50 parts of light base oil, 20 to 30 parts of a plasticizer, 20 to 30 parts of a stable balance agent and 5 to 10 parts of a penetrant. In the asphalt reclaiming agentprovided by the invention, the light base oil is rich in aromatic hydrocarbon, and is strong in asphaltene dissolution ability; the plasticizer can be inserted between polymer molecular chains, an interaction force between the asphalt molecular chains is weakened, and the movement ability of the asphalt molecular chains is increased, so that the low-temperature ductility of aged asphalt is increased; the balance of a reclaimed asphalt colloid system is ensured by the stable balance agent; an osmotic effect of the reclaiming agent is increased by the penetrant, the reclaiming agent is enabledto be fused with the aged asphalt on the surface of aggregated rock in a blending process, and the reclaiming performance of the asphalt reclaiming agent can be increased.

The invention discloses a regeneration method for a deactivated hydrodesulfurization catalyst. The method includes: (1) using an acid solution to clean a sieved deactivated hydrodesulfurization catalyst, and then performing drying treatment; (2) preparing a mixed solution containing ammonium gluconate and a metal additive, conducting saturated impregnation on the material obtain in step (1), and then performing drying, with the metal additive being one or more of Na, K, Mg, Ca, Cu and Zn elements; (3) firstly roasting the material dried in step (2) at a constant temperature of 260-320DEG C for 3-5h, with the O2 content of the roasting atmosphere being less than wt%; and then carrying out constant temperature roasting at 380-450DEG C for 4-7h, with the O2 content of the roasting atmosphere being higher than 20wt%. The method can improve the activity and selectivity of a regenerated FCC gasoline selective hydrodesulfurization catalyst.

The invention relates to an organic second-order non-linear optical chromophore with a D-Pi-A structure and decorated by a tree-like group, and a synthesizing method and applications thereof. The chromophore of the invention introduces a thiophene ring conjugated Pi electronbridge having stronger electrical transmission capacity and containing branched chains and a tricyano pyrroline receptor having strong electron-withdrawing property; the receptor end is introduced into the tree-like decorative group, the one-order hyperpolarizability of chromophore molecules is greatly improved; the solubility and the film forming ability of the chromophore in polymer is improved, the interaction force among the molecules is reduced. The second-order non-linear optical chromophore with the following structure is doped with polymers, such as amorphous polycarbonate or polymethylmethacrylate and the like according to the mass ratio of 1:10; the electro-optical coefficient of the obtained polarized polymeric materials achieves 217pm/V; in addition, the donor and receptor of the chromophore can be introduced into a crosslinkable group, thus improving oriented stability of the chromophore in polymer, and satisfying the requirements of devices.

The invention provides a polycarbonate heat-conducting composite material and a preparation method thereof. The composite material comprises components in parts by weight as follows: 100 parts of polycarbonate, 40-70 parts of heat-conducting masterbatch, 10-30 parts of glass fibers, 0.2-0.8 parts of a main antioxidant, 0.3-1.2 parts of an auxiliary antioxidant and 0.5-2.0 parts of a lubricant, wherein the heat-conducting masterbatch comprises components in parts by weight as follows: 30 parts of porous polycarbonate powder, 10-20 parts of carbon black, 5-20 parts of graphene, 5-10 parts of carbon nano-tubes and 5-15 parts of a compatilizer. The preparation method comprises steps as follows: A, preparation of the heat-conducting masterbatch; B, machining of the heat-conducting composite material: the polycarbonate, the heat-conducting masterbatch obtained in Step A, the main antioxidant, the auxiliary antioxidant and the lubricant are mixed in a high-speed mixer, the glass fibers are laterally fed through accurate calibration and extruded by a twin-screw extruder for granulation, and the polycarbonate heat-conducting composite material with higher heat conductivity is prepared.

The invention provides an organic compound, an organic electroluminescent device and an electronic device. The chemical structure of the organic compound comprises an adamantane spirofluorene ring anda dibenzo five-membered ring, and the organic compound has an excellent energy transfer function, can be used as a luminescent layer material in an electroluminescent device, improves the efficiencyof the organic electroluminescent device and prolongs the service life of the organic electroluminescent device.

This invention discloses a method for preparing ordered L10 alloy thin film. The order-disorder transition of the thin film is realized by laser annealing. The laser is CO2 laser, Ar+ laser, Nd: YAG laser or excimer laser. The power intensity of the laser applied on the surface of the alloy thin film is 10-100 W/mm2. The alloy thin film is placed on a platform that can be adjusted in three dimensions and can move freely, and the scanning rate of rapid scanning is 1-10 mm/s. By this method, the alloy thin film can maintain small grain sizes and decrease interaction forces among grains while forming fct ordered structure. Compared with traditional thermal annealing method, the method has simple process, and is suitable for industrial production of ordered L10 alloy thin film.

The invention relates to the field of building boards and in particular relates to a novel composite board and a preparation method thereof. The novel composite board comprises a bottom board and a panel layer which is stuck on the bottom board, wherein the bottom board comprises the following raw materials in parts by weight: 90-110 parts of PVC particles, 40-60 parts of calcium carbonate powder, 3-6 parts of a stabilizer, 1.0-1.4 parts of a foaming agent, 6-8 parts of a foaming regulator, 0.3-0.5 part of polyethylene wax, 0.3-0.4 part of internal lubricant, 0.2-0.4 part of oxidized polyethylene wax, 4-6 parts of chlorinated polyethylene, 0.5-1.5 parts of an internal lubricant additive and 9-11 parts of wood powder. The novel composite board has the good waterproof and damp-proof effects and solves the problem that common boards in the prior art are soaked by water so as to seriously deform. The novel composite board also has the recycling characteristic and solves the technical problem that a large amount of wood needs to be consumed in wooded boards in the prior art.

The invention discloses a preparation method of a graphene-rubber composite. The method comprises the following steps: dispersing graphene in a dispersing agent to prepare a dispersion solution; adding latex into the dispersion solution to obtain a mixture; and drying the mixture. Mechanical mixing and ultrasonic agitation are utilized to prepare the graphene-latex mixture. The prepared high-adsorptivity graphene-rubber composite has communicating three-dimensional channels inside, thereby reducing the graphene interlaminar interaction force, and reducing the phenomenon of interlaminar superposition; and thus, the graphene is uniformly dispersed in the rubber without easily aggregating, and the graphene structure can not be destroyed, thereby maintaining the properties of the graphene material. The graphene-rubber composite has very high oil absorption number, and has the property of adsorbing heavy metal ions and organic pollutants in a water phase.

The invention discloses a crown ether modified polyimide hybrid membrane and a preparation method thereof. The preparation method comprises the following steps: under the conditions of the humidity lower than 50%, room temperature and mechanical stirring, in an atmosphere of nitrogen, dissolving crown ether and aromatic diamine into a polarity organic solvent until the crown ether and the aromatic diamine are completely dissolved, continuing to stir to obtain a crown ether/diamine inclusion compound solution, adding aromatic dianhydride to the crown ether/diamine inclusion compound solution, after adding the aromatic dianhydride, continuing stirring to obtain a crown ether modified polyamide acid solution, uniformly smearing the crown ether modified polyamide acid solution on a clean glass sheet, eliminating bubbles, raising the temperature according to the setup program, after treatment, cooling the glass sheet to the room temperature, stripping off the membrane, drying and obtaining the crown ether modified polyimide hybrid membrane. In the invention, the crown ether molecules sleeve the polyamide acid chains to form necklace type supramolecular structures; the polyimide molecular chains are extended to be three-dimensional from two-dimensional type, so that the flexibility of the molecular chains is reduced, and the rigidity is promoted.

The invention discloses a low-viscosity and easy-pumping ultrahigh performance concrete and a preparation method thereof. The concrete comprises, by mass, 300-500 parts of cement, 100-200 parts of silica fume, 300-600 parts of an admixture, 400-800 parts of sands, 300-700 parts of crushed stones, 80-240 parts of fibers, 5-30 parts of a thixotropic enhancer, 15-30 parts of a water reducer, 0.1-0.3part of an antifoaming agent and 140-180 parts of water. The low-viscosity and easy-pumping ultrahigh performance concrete of the invention has a high fluidity and a low viscosity, the pumping resistance is only 0.015-0.025 MPa/m, and the compressive strength after 28 d standard curing is 180 MPa or above. In addition, the low-viscosity and easy-pumping ultrahigh performance concrete of the present invention has a typical low cement content, so the shrinkage of the ultrahigh performance concrete is significantly reduced, the use amount of the cement is significantly reduced, and the environmental pollution is reduced.

The invention provides polyimide film. The polyimide film is prepared by subjecting a polyamide acid solution compound to casting and imidization stretching, and the polyamide acid solution compound is mainly prepared by mixing the following components in parts by weight: 100-150 parts of polyamide acid resin, 5-20 parts of a plasticizer, 0.5-10 parts of a slipping agent and 50-125 parts of heat-conducting slurry. The prepared polyimide film is high in heat-conducting performance, excellent in mechanical performance, and easy in machine shaping and industrial production, and has wide application prospects in the aspect of interface heat-conducting insulating materials. The invention further provides a preparation method of the polyimide film; the preparation method has the advantages of short technology process, simple operation, low cost, environment friendliness, and suitability for large-scale production.