77results about How to "Increase structural stability" patented technology

The invention discloses a tissue engineering cartilage and a preparation method thereof. The tissue engineering cartilage is cytoactive, consists of sequentially laminated cell patches including a surface layer, a middle layer, a deep layer and a calcified layer, and takes collagen matrix as a main component; the layers are compounded by collagen and hyaluronic acid, and the bordering integration of various layers of cartilage structures is promoted through hydrostatic culture; and the tissue engineering cartilage is prepared by preparing various layers of cartilage cell patches and assembling multiple structural layers. The prepared tissue engineering cartilage is in a layering arrangement of a natural cartilage, has a very good tissue structure and very good mechanical properties (frictional coefficient is 75-85 percent that of a natural cartilage tissue, and the elastic modulus is 80-90 percent that of the natural cartilage tissue.); the integration between different layers is good; experiments prove that the prepared tissue engineering cartilage can form the tidal line same as that of a normal cartilage tissue and has the same layering structure; and the prepared tissue engineering cartilage is capable of promoting regeneration and function recovery of a cartilage and obviously shortening the cycle of cartilage damage treatment and is applicable to cartilage defect restoration for a load-bearing part of a articular cartilage.

The invention relates to a preparation method of infrared radiation ceramic powder in a spinel-silicate multi-phase composite system. The preparation method comprises the following steps: firstly, various raw materials are taken at a specified ratio, and then the primary processing of milling, mixing, drying and press-molding on the raw materials to form a blocky blank is carried out, and the obtained blocky blank is subjected to heating and heat preservation at the temperature in the range of 800 DEG C to 980 DEG C to form a spinel-type solid solution; then the temperature is continually heated up to 1100 DEG C to 1300 DEG C to heat and preserve heat of the blocky blank to form a silicate mineral, the spinel-type solid solution and the silicate minerals are composited in a multiphase way to form a black sintered body with a multiphase composite structure; and the obtained black sintered body is crushed, ground and sieved, so that the infrared radiation ceramic powder in the spinel-silicate multi-phase composite system can be obtained. The raw materials used in the invention are ordinary raw materials which are extensive in sources, the preparation method is simple and practical, short in production cycle and low in manufacturing cost, can be used in infrared radiation energy-saving coatings, infrared radiant heaters and the like of a high temperature industrial furnace (boiler), and has wide application prospect.

The invention relates to a preparation method of a nano porous copper oxide loaded precious metal catalytic material. The method comprises the steps of preparing ternary precursor alloy by adopting aluminum, copper and precious metal in a smelting way, preparing an alloy ribbon by adopting the alloy in a rapid melt quenching manner, carrying out alloy removal corrosion on the alloy ribbon in a 1% to 20% alkaline solution for 6 to 13 hours, then washing the alloy ribbon by utilizing deionized water and alcohol, drying the cleaned alloy ribbon in a constant-temperature drying box for 4 hours at the temperature of 40 DEG C so as to obtain a nano porous copper oxide loaded precious metal particle compound system, and then burning the system for 1 hour at the temperature of 300 to 900 DEG C to obtain the block-shaped nano porous oxide copper loaded nano precious metal particle catalytic material. The catalytic oxidation performance of the prepared precious metal nano particle loaded oxide copper catalytic material CO is obviously higher than that of the nano porous copper, and the structure stability and the heat stability are still relatively high after the material is thermally treated at the temperature of 750 DEG C.

The invention discloses multiphase composite system infrared radiation ceramic powder applicable to products, such as infrared radiation energy-saving coating, an infrared radiation heater and the like, of a high-temperature industrial kiln (boiler). The multiphase composite system infrared radiation ceramic powder is prepared from the following raw materials in percentage by mass: 20 to 80 percent of spinel type solid melt ceramic powder, 6 to 60 percent of Al2O3, 5 to 56 percent of SiO2, 0 to 10 percent of MgO, 0 to 3 percent of BaO, 0 to 3 percent of CaO and 0 to 6 percent of TiO2, whereinthe spinel type solid melt ceramic powder is prepared from the following raw materials in percentage by mass: 0 to 60 percent of Fe2O3, 0 to 60 percent of MnO2, 0 to 12 percent of CuO, 0 to 10 percent of Co2O3, 0 to 6 percent of Mo2O3, 0 to 6 percent of NiO, 0 to 5 percent of V2O5 and 0 to 5 percent of WO3. The invention also discloses a preparation method of the multiphase composite system infrared radiation ceramic powder. All the raw materials are the common raw materials with wide sources; a spinel-silicate multiphase composite system has a stable structure, excellent infrared radiation property, can adjust the structure and the property of the materials easily by controlling the components, and has a wide application prospect.

Blades mounted on a circumferential outer surface of a hub of an axial flow fan do not deform even when rotated at high speed, thus promoting structural stability. The direction of the sweeping angle of each blade alternately changes between the blade root and tip. A chord length between the blade leading and trailing edges gradually decreases from the blade root to an intermediate portion of the blade, and the chord length gradually increases from a predetermined position on the intermediate portion of the blade to the blade tip.

The invention belongs to the technical field of lithium ion battery cathode materials, and specifically relates to a preparation method of a lithium ion battery high-nickel cathode material. An oxidizing agent is added into precursor alkaline slurry prepared through a coprecipitation method for precursor pre-oxidation, then the pre-oxidized precursor is converted into a polycrystalline mixture byadjusting a drying process, and then the polycrystalline mixture and a lithium source are mixed in air or a low-oxygen-concentration mixed atmosphere to be sintered at a time to obtain a target product. According to the preparation method disclosed by the invention, alkali liquor can be recycled to realize precursor pre-oxidation, the sintering time and temperature are shortened, the residual alkali value is reduced, and the crystallinity of the material is improved. In the calcining process, oxygen demand is low, safety is good, and the method is more suitable for industrial large-scale production.

The invention provides a positive plate and a lithium ion battery. The positive plate comprises a positive current collector and a positive diaphragm, wherein the positive diaphragm is arranged on thepositive current collector and comprises a first positive material layer and a second positive material layer, the first positive electrode material layer is arranged on the positive electrode current collector and comprises a first positive electrode active material, the first positive electrode active material is a ternary positive electrode material, the second positive electrode material layer is arranged on the first positive electrode material layer and comprises a second positive electrode active material, the second positive electrode active material is selected from one or more of olivine type lithium-containing phosphate and spinel type lithium manganate, the total reversible capacity of the first positive electrode active material per unit area of the positive electrode diaphragm is a, the total reversible capacity of the second positive electrode active material per unit area of the positive electrode diaphragm is b, and that a / b is not smaller than 1 and is not greater than 30 is satisfied. The positive plate is advantaged in that high-temperature cycle performance and safety performance of the lithium ion battery can be improved, and the lithium ion battery is ensured to have relatively high energy density.

The invention discloses a titanium dioxide / nanosilver / cocoon fiber magnetic porous composite material and a preparation method thereof. The preparation method comprises the following steps: modifying salix psammophila cellulose by using polydopamine; carrying out freeze-drying treatment by using liquid nitrogen to obtain the magnetic porous composite material; immersing the magnetic porous composite material into a mixed solution with a silver-ammonia solution and titanium dioxide nanotubes for reacting for 60-300 minutes, taking the magnetic porous composite material out of the mixed solution, then repeatedly washing the magnetic porous composite material with deionized water, and carrying out vacuum drying to obtain the magnetic porous composite material. According to the magnetic porous composite material, salix psammophila and cocoon fibers are used as base materials, so that raw materials are abundant and the cost is low; then magnetic nano ferroferric oxide, nanosilver and titanium dioxide nanotubes are effectively and synergistically self-assembled to obtain a porous nanocomposite material; the porous nanocomposite material has important application values in the fields such as adsorption materials, photocatalysis, biological materials and medical materials and the like.

The invention discloses a nanometer titanium dioxide material uniform in particle size distribution. The nanometer titanium dioxide material is prepared through the following steps of step 1, adding titanic acid dinbutyl phthalate to anhydrous ethanol, adding polyvinylpyrrolidone, performing sealing ultrasonic dispersion for 10-30min, and performing cooling so as to obtain titanic acid dinbutyl phthalate fluid dispersion; step 2, adding hydroxypropylcelliloxe to the titanic acid dinbutyl phthalate fluid dispersion, performing slow stirring until the hydroxypropylcelliloxe completely dissolves,and then performing sealing ultrasound treatment for 20-50min, so as to obtain the titanic acid dinbutyl phthalate fluid dispersion with a double dispersing system; step 3, slowly adding distilled water to the titanic acid dinbutyl phthalate fluid dispersion with the double dispersing system, performing uniform stirring, performing sealing heating supersonic reaction for 2-5h, performing ultrasound evaporation reaction for 2-4h, and performing filtering while the processed titanic acid dinbutyl phthalate fluid dispersion is hot, so as to obtain sediment; and step 4, adding the sediment to methanol reaction liquid, performing micro electrolytic reaction for 3-5h, performing filtering and washing, and then performing drying so as to obtain the nanometer titanium dioxide material uniform inparticle size distribution. Through adoption of the nanometer titanium dioxide material disclosed by the invention, the problem that a conventional technical technology is complicated is solved; and the prepared titanium dioxide has good photocatalytic activity, and is uniform in particle size distribution and good in structural stability.

The invention discloses a composite-photocatalyst-supported silicon material preparation method, which specifically comprises: (1) pre-treating raw materials; (2) loading a titanium dioxide carrier; (3) preparing an inner layer solution; (4) preparing an outer layer solution; (5) carrying out primary impregnation; and (6) carrying out secondary impregnation. According to the present invention, the silicon material is subjected to the heat treatment by adding the strong alkali solution, such that the controllability is strong, and the too low surface energy of the silicon material is easily increased; by using the Ti3+ in-situ assisted reduction method, the noble metal nanoparticles are uniformly distributed on the carrier titanium dioxide surface, such that the loading distribution is uniform, the interface binding is solid, and the photo-oxidation reaction is efficiently and selectively performed; the microwave radiation treatment is performed in the inner solution, such that the conditions are mild, the reaction rate is rapid, and the yield is high; and the carbon atoms of the graphene adopt the sp2 hybridization linkage, such that the good adsorption ability to pollutants is provided, the obtained silicon material loads the graphene, the high structural stability and the thermal stability are provided, and the adsorption capacity of the material under the mild condition is effectively improved.

The invention provides a lithium metal battery, and relates to the field of batteries. The lithium metal battery comprises a positive electrode, a negative electrode, an isolating membrane arranged between the positive electrode and the negative electrode, and electrolyte infiltrating the isolating membrane. The negative electrode comprises a negative electrode current collector and a lithium-aluminum alloy layer compounded on the surface of at least one side of the negative electrode current collector; and the electrolyte comprises an electrolyte and a solvent, the solvent contains a film-forming agent, and the film-forming agent is FEC and / or DFEC. According to the lithium metal battery, the problems of poor cycle performance and poor safety performance of the existing lithium metal battery can be solved, so that the lithium metal battery with good cycle performance and good safety performance is provided.

The invention relates to the technical field of monitoring equipment, and discloses a smart home monitoring device which comprises a shell, wherein a hydraulic telescopic rod is movably sleeved with the shell, a camera is fixedly installed on the bottom surface of the hydraulic telescopic rod, and the outer surface of the hydraulic telescopic rod is fixedly sleeved with a first gear. In the sSmarthome monitoring device, as the camera mounted at the bottom end of the hydraulic telescopic rod rotates,; when dust needs to be cleaned up, the hydraulic telescopic rod acts to drive the camera to move upwards when dust needs to be cleaned up,; the movable rod upwards drives the pressing plate to extrude the pressure oil; , and the pressure oil enters the a sealing pipe through the oil pipe; thea bottom surface of the camera rotates to move relative to the cambered cleaning block, so that dust on the surface of the camera is cleaned, the cleaning speed is high, the situation that a worker climbs a ladder to achieve cleaning is avoidedprevented, falling during cleaning is avoidedprevented, the cleaning safety is improved, manual operation is reduced, and the cleaning effect is good.

A semiconductor structure is provided. The semiconductor structure includes a first substrate, a second substrate opposite to the first substrate, a plurality of spacers disposed between the first substrate and the second substrate, and an adhesive material bonded with the first substrate and the second substrate within the two adjacent spacers. The invention also provides a method for fabricating the semiconductor structure.

The present invention is directed to a microfabricated RF capacitor. The capacitor includes two signal wirebond pads configured for being connected to an electrical current source. The capacitor further includes two backbone structures which are connected to the wirebond pads and receive electrical current from the electrical current source via the wirebond pads, each backbone structure including a first backbone portion and a second backbone portion. The capacitor further includes a plurality of protrusions which are connected to the backbone portions of the backbone structures. The protrusions are spaced apart from each other and parallel to each other. Further, the protrusions are configured for distributing current received by the backbone structures and for promoting structural stability of the capacitor. The capacitor further includes a ground wall structure which may be configured for receiving ground current from a ground current source.

There is described a bus connector with at least two cable connections for bus lines, with the cable connections being provided in each case for electrical connection to a bus signal line and a bus screen line of a cable, with a screen connector of the cable connection being provided for electrical contacting of the bus screen connection of the cable to the elements screening the bus connector. The screen connector is embodied as a flat screening of the cable connections and contact elements are arranged in the area of the contacting of the bus screen lines which are intended for automatic contacting of the bus screen lines with the elements of the bus connector screening it when clamped on during installation of the housing.

The invention relates to an electromagnetic system of a clapper type magnetic latching relay for solving the problem that the existing electromagnetic system of the magnetic latching relay is unsteadyin structure, unreliable in operation and difficult to adjust magnetic attraction force. The electromagnetic system of the clapper type magnetic latching relay comprises an electromagnetic part and ayoke component; the yoke component comprises a yoke; a pressure spring is arranged outside the vertical part of the yoke; a magnetic conduction block is arranged at the inner side; a rectangular holeis arranged on the vertical part of the yoke; furthermore, both the pressure spring and the magnetic conduction block are connected with the yoke; magnetic steel is arranged between the vertical partof the yoke and the magnetic conduction block; the electromagnetic part comprises a coil; an iron core is arranged in the coil in a penetrating manner; furthermore, the upper end of the iron core extends to be above the coil; the vertical part of the yoke is positioned at one side of the coil; the horizontal part of the yoke is connected with the iron core; an armature is arranged at one side ofthe yoke away from the coil; the straight part of the armature is connected with the upper end of the iron core; and a push card square hole is on the bended part of the armature. The electromagneticsystem of the clapper type magnetic latching relay has the advantages of being simple and steady in structure, reliable in operation, easy to adjust the magnetic attraction force and the like.

The present invention provides porous ceramic materials having good resistance to heat, acid and base, comprising three or more oxides selected from an oxide of silicon (SiO), an oxide of aluminum (AlO), an oxide of a transition metal, MxOy, [wherein M represents a 4B, 5B or 6B-group transition metal which can be selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W or Ce, x represents an integer of 1 to 3, and y represents an integer of 1 to 3] and its preparation. By applying ceramic materials prepared according to the present invention that are structurally, thermally and chemically stable to a porous honeycomb support for the purification of exhaust gas or to a filter (DPF, Diesel Particulate Filter) for the purification of diesel engine exhaust gas, it is possible to prevent or remarkably reduce any structural destruction caused by corrosive gas, which results from employing a cordierite material as a structural support.

The invention provides a mulch plastic film recovery device to keep the mulch plastic film intact when removing, and relates to the technical field of mulch plastic film recovery. The device includesa main support, the top of the main support is movably connected with two material collecting supports, the top of each material collecting support is movably connected with a material collecting mechanism, the lower part of each material collecting mechanism is movably connected with a material blocking frame, the middle part of the main support is movably connected with a traction frame, main plough frames are movably connected at the opposite sides of the two material collecting supports, and the bottom of each main plough frame is connected with a secondary plough frame. According to the device, the main support can provide support for all the structures on the main support and maintain their position stability, and structural stability between the structures can be increased when in use, the main plough frames and the secondary plough frames can provide support for soil-turning ploughs, the heights of soil-turning ploughs can be conveniently adjusted through screw connections between the main plough frames and the secondary plough frames, and the soil originally covered on both sides of the mulch plastic film can be turned over through the soil-turning ploughs in the working process.

The invention discloses a phenylboronic acid functionalized Ti3C2Tx magnetic composite material and a preparation method and application thereof. The phenylboronic acid functionalized Ti3C2Tx magnetic composite material is prepared by modifying Ti3C2Tx with a multi-layer structure into amino Ti3C2Tx, namely Ti3C2Tx-NH2, then synthesizing Ti3C2Tx-CTFs-NH2 through further hyperbranched reaction of melamine and cyanuric chloride, and carrying out covalent crosslinking on 4-formyl phenylboronic acid through acetal to synthesize boric acid functionalized Ti3C2Tx, namely Ti3C2Tx-BA; and finally dispersing Fe3O4 nano particles in the surface and interlayer structure of Ti3C2Tx-BA to prepare the phenylboronic acid functionalized Ti3C2Tx magnetic composite material, namely Fe3O4@Ti3C2Tx-BA. The phenylboronic acid functionalized Ti3C2Tx magnetic composite material has the advantages of high adsorption capacity, good selectivity, stable structure, simple and convenient synthesis method, low preparation cost, strong regeneration capability, strong anti-interference capability, short extraction time and the like. The preparation method has the advantages of rapidness, high efficiency, low cost, environmental friendliness, reusability and the like.

The invention discloses a total element vector propulsion system which comprises a propulsion device for supplying thrust, a variable-structure mechanism for controlling the thrust direction and thrust application point of the propulsion device, and a carrier for fixing the variable-structure mechanism, wherein the variable-structure mechanism comprises a rotating mechanism for controlling the thrust direction of the propulsion device and a swing mechanism for controlling the thrust application point of the propulsion device; and the rotating mechanism and the swing mechanism are in synchronous linkage. According to the invention, the thrust direction, thrust size and thrust application point of the propulsion device are simultaneously controlled through the variable-structure mechanism, so as to realize all-round control of the thrust of the propulsion device; and particularly, the swing action and rotating action of the propulsion device can be simultaneously controlled through the variable-structure mechanism, so as to form a planetary gear train motion mode. The total element vector propulsion system has the advantages of flexible control, good structure stability and wide range of application.

The invention relates to an environment-friendly and energy-saving building construction supporting frame. The environment-friendly and energy-saving building construction supporting frame comprises a supporting base, a connecting column, a lifting device and a jacking device, the connecting column is arranged on the supporting base, the upper end of the connecting column is connected with the lower end of the lifting device, and the jacking device is arranged at the upper end of the lifting device. The environment-friendly and energy-saving building construction supporting frame can solve the problems that an existing building construction supporting frame is mainly composed of a supporting base and a supporting rod in a sleeving mode, a supported object is supported by lifting the supporting rod in the supporting process, then the side wall of the supporting rod abuts against and is locked through a locking connecting piece, the position between the supporting rod and the supporting base is completely located through the locking connecting piece, when sliding occurs between the locking connecting piece and the supporting rod due to unstable supporting, it often means that the supporting rod loses the supporting function, the supported object may collapse, an existing supporting frame is relatively fixed in structure and cannot be disassembled, transportation needs to be carried out in a large-piece state during transportation.

The invention relates to the technical field of buildings, and discloses a large-span silo roof construction platform. The large-span silo roof construction platform comprises bottom columns, middle columns, top columns, bailey trusses, connecting parts, a base plate and a formwork scaffold; and all the structures are independently prefabricated and spliced and installed on a construction site to form an integral structure. According to the large-span silo roof construction platform, the roof high-altitude operation platform is installed in a segmented mode and fast and convenient to erect, construction cost consumption can be effectively reduced, construction operation convenience is improved, the bottom columns, the middle columns and the top columns are used for supporting the bailey frames together with silo walls, stress of the silo walls is shared, the construction platform is high in structural stability, the multiple rows of bailey frames are arranged, the self weight of a single row of bailey frames is small, so that hoisting and mounting are convenient, connection among all structures is stable and reliable, the safety is good, the construction platform can adapt to various large-span structures and high-altitude construction, and the application range is wide. The invention further provides an erecting method of the large-span silo roof construction platform. The erecting method has the advantages of being high in erecting efficiency, good in safety and the like.

There is described a bus connector with at least two cable connections for bus lines, with the cable connections being provided in each case for electrical connection to a bus signal line and a bus screen line of a cable, with a screen connector of the cable connection being provided for electrical contacting of the bus screen connection of the cable to the elements screening the bus connector. The screen connector is embodied as a flat screening of the cable connections and contact elements are arranged in the area of the contacting of the bus screen lines which are intended for automatic contacting of the bus screen lines with the elements of the bus connector screening it when clamped on during installation of the housing.

The invention provides a self-balancing flexible photovoltaic panel bracket comprising two symmetrically-arranged columns, a flexible suspension cable, a stabilizing cable and a tripod. Each column isprovided with a rigid rod, rollers are fixedly mounted at the two ends of each rigid rod, the flexible suspension cable is annular and is arranged on the rigid rod by means of the rollers in a sleeving manner, the two ends of the stabilizing cable are fixed to the top ends of the two columns, and the three top ends of the tripod are fixed to the stabilizing cable and the flexible suspension cable. The self-balancing flexible photovoltaic panel bracket adopts a single-frame flexible photovoltaic bracket supporting system, the course amount of a steel structure is reduced, the engineering costis reduced, and better economic benefits are achieved.

The invention discloses a preparation method of a water-soluble antibacterial quaternized chitosan / Ag nano composite microsphere. The method comprises the following steps: carrying out surface amino functionalization modification on Ag nano particles, and carrying out ultrasonic treatment to prepare a uniform Ag nano particle dispersion liquid; adjusting the mass ratio of 2,3-epoxypropyl trimethyl ammonium chloride to chitosan to obtain quaternized chitosan; dissolving a non-polar emulsifier solution, hydrophilic metal salt and quaternized chitosan in the amino-modified Ag nanoparticle aqueous dispersion liquid, and pre-emulsifying to obtain a crude emulsion; and after ice-bath ultrasonic treatment, dropwise adding a cross-linking agent, and reacting under the protection of nitrogen to prepare the water-soluble antibacterial quaternized chitosan / Ag nano composite microspheres. According to the quaternized chitosan / Ag nano composite microspheres and the preparation method thereof disclosed by the invention, a Schiff base structure is formed by reacting aldehyde groups with quaternized chitosan molecules and amino groups on the amino-modified Ag nanoparticles, so that the quaternized chitosan / Ag nano composite microspheres with good colloidal stability and excellent antibacterial performance is prepared.

A preparation method of antibacterial quaternized chitosan / Ag hybrid nano-hydrogel, said method comprising the following steps: (1) carrying out amino modification of Ag nanoparticles to obtain amino-modified Ag nanoparticles water Dispersion liquid; (2) chitosan is modified with 2,3-epoxypropyltrimethylammonium chloride to obtain quaternized chitosan; (3) emulsifier is dissolved in non-polar solvent to obtain Nonpolar emulsifier solution; (4) hydrophilic metal salt and quaternized chitosan are dissolved in the Ag nanoparticle aqueous dispersion liquid of amino modification, obtain dispersion A; Then dispersion A is added to nonpolar (5) directly drop the cross-linking agent to the reverse mini-emulsion, and react to prepare the quaternized chitosan / Ag hetero The nano hydrogel is purified and then dispersed in water to obtain its aqueous dispersion. The prepared hybrid nano-hydrogel has the advantages of good dispersibility, controllable particle size, good colloidal stability, and broad-spectrum antibacterial properties.

A preparation method of antibacterial quaternized chitosan / Ag hybrid nano-hydrogel comprises the following steps: (1) carrying out amino modification on Ag nano-particles to obtain an aqueous dispersion of the amino-modified Ag nano-particles; (2) modifying chitosan by using 2, 3-epoxypropyl trimethyl ammonium chloride, so as to obtain quaternized chitosan; (3) dissolving an emulsifier in a non-polar solvent to obtain a non-polar emulsifier solution; (4) dissolving a hydrophilic metal salt and quaternized chitosan in the amino-modified Ag nano-particle aqueous dispersion to obtain a dispersion A, adding the dispersion liquid A into a non-polar emulsifier solution, stirring and pre-emulsifying to obtain a crude emulsion, and performing ultrasonic treatment to prepare a reversed-phase miniemulsion; and (5) directly dropwise adding a cross-linking agent into the reversed-phase miniemulsion, reacting to prepare the quaternized chitosan / Ag hybrid nano-hydrogel, purifying, and dispersing in water to prepare the aqueous dispersion of the quaternized chitosan / Ag hybrid nano-hydrogel. The prepared hybrid nano-hydrogel has the advantages of good dispersity, controllable particle size, good colloidal stability, broad-spectrum antibacterial property and the like.