1061results about How to "Adjustable structure" patented technology

The invention discloses a hydroxypolyacrylate emulsion, and a preparation method and an application thereof. The preparation method comprises the following steps: weighing an acrylate monomer and/or a metacrylate monomer, a hydroxyacrylate monomer, an acrylic monomer, an acrylate function monomer and a hydroxy oligomer, uniformly mixing to prepare a monomer mixture, weighing 10-15% of the monomer mixture, and emulsifying by using an emulsifier to prepare a seed pre-emulsion for later use; and adding the emulsifier, sodium bicarbonate and deionized water into a reaction kettle, stirring, rising the temperature of a reaction system, adding an initiator, stabilizing, adding the seed pre-emulsion in a dropwise manner, stabilizing, adding the remaining monomer mixture and the remaining initiator in a dropwise manner, heating, slaking, cooling, neutralizing, carrying out heat insulation, cooling, and discharging to obtain the hydroxypolyacrylate emulsion. A film made by using an aqueous dual-component polyurethane coating prepared from the hydroxypolyacrylate emulsion and an aqueous polyisocyanate curing agent has the advantages of high hardness, high luster and excellent chemical resistance.

A mini-camera with an adjustable structure mainly includes a camera body, a support and at least one limiting element disposed at a connection between the camera body and the support. The limiting element provides the camera body with enough friction for adjusting the viewing angle of a camera lens relative to the support. A user can step-less adjust the view angle of the camera lens of the camera body, the user doesn't need disassemble the camera body or the support, and further the user cannot damage the connection between the camera body and the support for maintaining the outside beauty of the mini-camera.

The invention provides a simple and flexible field calibration and precision measurement method for a spot laser measuring system by analyzing the camera imaging principle, establishing a camera imaging model and introducing the concepts of two structural parameters, namely a basic line distance and a reference angle aiming at the defects of extreme calibration conditions and complicated calibration steps of the traditional spot laser-camera measuring system. In the method, only two standard planar heights H1 and H2 are needed to precisely complete the calibration task of the system structure, and the spot laser-camera measuring system of the algorithm has higher measuring precision so as to meet the requirement of precision measurement. The algorithm makes the spot laser-camera structure adjustable and field calibration of system structural parameters possible; and the flexibility of a laser ranging system is greatly improved and the method has important significance for actual vision measurement.

The invention relates to an application of a porous carbon material with a grading pore structure in a lithium-air cell anode, and is characterized in that the carbon material has mutually communicated grading pore structure distribution which has a mesoporous structure for depositing the discharge products and a macroporous structure suitable for transmission of oxygen and an electrolyte. When the carbon material is taken as a material of the lithium-air cell anode, the space utilization rate of carbon material can be increased at maximum limitation during a charge and discharge process, specific discharge capacity, voltage platform and multiplying power discharge capability of the cell can be effectively increased, so that the energy density and power density of the lithium-air cell can be increased. The porous carbon material has the advantages that the preparation technology is simple, the material source is wide, the grading pore carbon material pore structure enables regulation and control, the regulation and control modes are various, and the doping of metal/metal oxide can be easily and simultaneously realized.

The invention relates to a polydialkene composite rubber of trans-1,4- structure and preparation methods thereof. The composite rubber consists of 10 to 80 mass percent of trans-1,4-polyisoprene and 20 to 90 mass percent of trans-1,4-butadiene-isoprene copolymer, wherein over 90 percent of structural units of all dialkenes in the composite rubber have trans-1,4-structures. The first preparation method comprises the following steps of: homopolymerizing isoprene to obtain trans-1,4-polyisoprene by adopting a Ziegler-Natta catalysis system consisting of MgCl2 supported titanium and organic aluminum compound, and then adding butadiene to synthesize the trans-butadiene-isoprene copolymer. The second preparation method comprises the following steps of: adding mixed monomers of butadiene and isoprene into a polymerization device at the same time, performing copolymerization to obtain the butadiene-isoprene copolymer of the trans-1,4-structure, and continuously polymerizing the isoprene to obtain the trans-1,4-polyisoprene after the butadiene with high polymerization speed is completely consumed. The used polymerization device is a stirring reaction kettle or a screw extruder. The composite rubber has excellent performance such as low rolling resistance, low generated heat, abrasion resistance, particularly fatigue break increment resistance and the like, and is suitable for dynamically used rubber products such as tyres, vibration absorption materials and the like.

The invention discloses a fast decoupled flow calculation method for power systems, which comprises the following steps of: inputting original data and initializing voltage; forming an admittance matrix; forming correction equation coefficient matrixes B' and B'' and performing factor table decomposition; performing P-theta iteration, and correcting a voltage phase angle; performing Q-V iteration, and correcting voltage amplitude; judging whether the iteration is converged; and calculating node power and branch power. The method requires that the P-theta iteration and the Q-V iteration are all converged in the same iteration and the iteration process is finished, so that the algorithm frame is simpler, and the flow is clearer. The sparse matrix technology is not adopted, so the matrix elements are convenient to access and calculate, and the programming is simple; the correction equation coefficient matrixes are stored according to n order, number change of nodes is avoided, and the programming difficulty is reduced; and the calculation amount is reduced through reasonable logic judgment, the calculation speed is obviously improved and the requirement of scientific research can be completely met. The fast decoupled flow calculation method also can process power systems with a plurality of balance nodes.

The invention relates to water-soluble polymer/graphene composite fiber as well as a preparation method and application thereof. The cross section of the fiber is special-shaped, the surface of the fiber is of an orientated micro-fiber-shaped structure, the strength of the fiber is greater than 100 MPa, the elongation at break is greater than 2%, and the conductivity of the fiber is greater than 0.1 S/cm. The preparation method comprises the following steps: preparing a composite spinning liquid, extruding into a coagulating bath for curing, drafting, leading out of the coagulating bath, drying, and coiling, thereby obtaining the water-soluble polymer/graphene composite fiber; and finally reducing by using a chemical or physical method, thereby obtaining the water-soluble polymer/graphene composite fiber. The cross section of the composite fiber provided by the invention is of a special-shaped structure, the surface of the fiber is of a rich groove micro structure, the strength and the toughness of the fiber are greatly improved when being compared with those of pure graphene fiber, and good conductivity is still maintained, so that the water-soluble polymer/graphene composite fiber has a wide application prospect in the fields such as anti-electrostatic and conductive fabrics, electromagnetic wave absorption and shielding fabrics, energy storage devices, sensors and water treatment.

The invention discloses a nanoparticle-containing polypropylene inside-kettle alloy capable of being used for 3D printing, and a preparation method and an application thereof. The nanoparticle-containing polypropylene inside-kettle alloy is obtained by utilizing a catalyst including a nanoparticle carrier-type catalyst and carrying out two-stage polymerization catalysis of propylene and ethylene/alpha-olefin; the alloy is granular in shape, and the particle diameter is 50-1000 [mu]m. Because the nanoparticle-containing polypropylene inside-kettle alloy has small and uniform particle morphology, the alloy can be directly used as a raw material of 3D printing by adding a heat stabilizer, and is especially suitable for 3D printing prepared nanoparticle-containing polypropylene inside-kettle alloy products which have high melt viscosity and are difficult to process and mold.

The invention relates to a preparation method for mesoporous silicon oxide hollow microspheres with magnetic nanoparticles embedded in shell layers. In the invention, the magnetic nanoparticles are prepared by using a coprecipitation method, are subjected to oleic acid surface modification and then are dispersed in normal octane; an oil phase constructed by styrene monomer, cetane, normal octane dispersion of the magnetic nanoparticles, alkoxysilane and a silane coupling agent is mixed with a water phase which dissolves a surfactant; a fine emulsion liquid droplet system is obtained through pre-emulsification and fine emulsification processes; controlling formation of silicon oxide and phase separation of organic and inorganic components in the system to obtain a template with a nested structure during free radial polymerization of the liquid droplets by adding a base catalyst; based on the template, generating a raw material by taking long-chain alkyl silane coupling agent and alkoxysilane as mesoporous silicon oxide; performing one-step ablation to remove an inner core of a polymer and a pore forming agent; or by taking a cationic surfactant as the pore forming agent, removing the pore forming agent and the inner core of the polymer through a solvent dissolving method and obtaining the magnetic/mesoporous silicon oxide hollow composite microspheres. The composite microspheres have large specific surface area and good magnetic operability and can be used for application fields of biomedicine, environment, water treatment and the like.

The invention discloses a method for planting lawn in saline-alkali soil and relates to the fields of the saline-alkali soil control and planting technology. The method comprises the steps of: 1, soil arrangement; 2, establishment of a drainage canal; 3, straw application; 4, sand covering on a surface; 5, selection of grass seeds; 6, planting technology; 7, fertilizer application according to formulas; and 8, cultivation management. In the method, the bare surface of the saline-alkali soil can be covered effectively in short time, the water evaporation of the ground is reduced, and the saltness of the surface soil is reduced; the saline-alkali soil can be utilized comprehensively in a large area, and the vegetation structure of the saline-alkali soil can be adjusted; and the vegetation cover area of the saline-alkali soil is enlarged, and the ecological environment is protected and improved.

A multifunctional symergistic for chemical fertilizer is prepared from trace elements, insecticide, action-elongating agent, bacterial agent, plant growth promoter and plant growth regulator through proportional mixing. Its advantage is high multifunctional effect.

The invention discloses a phosphono-group-containing water reducing agent and a preparation method thereof. The phosphono-group-containing water reducing agent is in a comb-like structure, wherein the main chain has an acid anhydride group, carboxylate group or amido group; the main chain does not provide the initial water reducing capacity, but releases adsorption groups after being hydrolyzed under alkaline conditions in the later period, thereby enhancing the slump retaining capacity; side chains comprise pure polyether side chains and polyether side chains with an adsorption group at the terminal; the pure polyether side chains provide steric hindrance; and the adsorption groups comprise phosphono groups and phosphorous acid groups, and have multiple and centralized adsorption sites, thereby providing the initial adsorption capacity and dispersion capacity of the water reducing agent. The main adsorption groups in the phosphono-group-containing water reducing agent are phosphono groups; and carboxylates or acid anhydrides in the water reducing agent structure can continuously release new carboxyl adsorption groups through the reaction of water under alkaline conditions in the later adsorption period, thereby achieving better slump retaining properties.

The present invention discloses a light-weight coated printed paper and its making method. It includes the following steps: using bleached sulfate needle wood (pulp (BKP). Italia poplar alkaline hydrogen peroxide hot-ground mechanical wood pulp (APMP), bleached sulfate reed pulp (BKP) or commercial bleached hard wood pulp; respectively beating, proportioning and making them into mixed pulp; adding auxiliary material to obtain material for making paper and making paper. Said invention adopts the advanced making process of AKD neutral sizing, internal coating and calendering by using soft roll, so that said printing paper has good surface strength, bulkness and air permeability, and is suitable for implementing various colour printing.

A process for brewing fruit wine, fruit vinegar and fruit brandy includes such steps as fermenting fruit juice to obtain dry, semi-dry, or sweet fruit wine, distilling the fermented wine substrate to prepare fruit brandy, and using the distilled dregs and squeezed fruit dregs to prepare fruit vinegar. Its advantages are high utilization rate of fruit, low cost, and less pollution.

The invention relates to a method of improving a yarn surface structure in a positive holding rotation mode and belongs to the technical field of textile processing. According to the method, a front central positioning yarn guide hook, a holding rotation type yarn hairiness reducing device and a rear central positioning yarn guide hook are arranged on the operation path of each yarn in sequence, wherein each yarn enters the holding rotation type yarn hairiness reducing device through the front central positioning yarn guide hook; the trunk of the yarn enters the center of a yarn channel and keeps a tensioning straightening state, the surface hairiness of the yarn is subjected to a negative pressure air draft effect, the hairiness is absorbed on the outer surface of a conical housing and synchronously rotates along with the conical housing, and meanwhile, at the inlet of the yarn channel, the hairiness continues tightly winding the operating yarn trunk, and the smooth densifying treatment is realized on the yarn surface structure. The method is wide in applicable range and can be used for processing various yarns; the holding rotation type yarn hairiness reducing device is reasonable in structure and convenient to operate.

The invention belongs to the field of preparing a nanometer material, and particularly relates to a method for preparing nanometer porous copper. In the invention, the nanometer porous copper is prepared by the method combining the rapid solidification, the blow-casting and the dealloying. The method comprises the following steps: firstly, heating pure Mg and Cu are to a molten state, and casting the molten Mg and Cu into a cast ingot; secondly, melting the cast ingot to the molten state again, and utilizing inert gas to quickly blow out an alloy liquid, so that the molten metal is quickly solidified on a copper roller rotating at a high speed, and an alloy ribbon is prepared, or utilizing the inert gas to quickly blow the alloy liquid in a copper die, so that an alloy plate or alloy rod is prepared; and finally, performing dealloying treatment in acid solution. The method has the advantages of simple process, high efficiency and the suitability for mass industrialized production. The method can also control the structure and size of the nanometer porous cooper according to compositions of the master alloy and types of the etchant solution.

The invention discloses a pyrrole aromatic diamine containing a phthalic nitrile structure and a preparation method thereof. 2-bromoacetophenone is taken as a raw material to prepare 4-(2,5-bi(4-aminophenyl)-pyrryl) phthalonitrile by reaction of four steps, namely condensation, closed loop, nitration and reduction. The aromatic diamine disclosed by the invention is high in purity, and stable at room temperature, and is an important monomer component for preparing a plurality of polyimides, and an application of the polyimides in the fields such as a high-performance fiber, organic luminescent materials, a functional coating, a special adhesive and the like is expanded.

A front-opening, adjustable bra having an elastic base band having free ends, an inside end portion adjacent one of said free ends and an outside end portion adjacent to other of said free ends, a back flap disposed between said free ends, and a pair of front flaps disposed between said free ends and said back flap, each flap having a breast covering flap. The inside end portion having an outwardly extending latch-engaging structure and a set of at least two spaced latching structures, and the outside end portion having an inwardly extending latch-engaging structure and at least two inwardly spaced extending latch structures. The latch-engaging structures engage a selected one of the respective latching structures to set the size of the bra. The latch-engaging structures and the latch structures can be reversed on the bra. A slide having three loops for receiving shoulder straps of a bra is also described.

The invention provides a method and a device for optimizing a webpage in network equipment. The method comprises the steps of: obtaining first webpage information to be treated; analyzing various information units included in the first webpage information to determine the class to which each information unit belongs; and based on a first preset rule, by combining with the classes of the information units, realizing the purpose of converting the first webpage information into second webpage information used for providing for the user equipment. Compared with the prior art, the invention has the advantages of: being capable of remarkably displaying the contents concerned by a user to reduce the searching time of the user, being capable of shielding the advertisement contents and the contents which are not concerned by the user to bring better webpage browsing experience, being capable of removing the redundant contents in the webpage and reducing the loading time of the webpage, and being capable of regulating the webpage structure and quickening the composing speed of the webpage.

The preparation method of magnetic nano particle with bio-compatibility includes the following steps: heating and decomposing metal organic iron compound in high boiling point polar solvent in the presence of bio-compatibility molecule, precipitating and separating so as to obtain said magnetic nano particles with bio-compatibility. By adopting bio-compatibity molecules containing double-functional group (for example double-functional group polyglycol and its derivative, etc.) to make modification the magnetic nano particles whose surface has different functional groups can be obtained. By adopting different iron materials the nano particles with different types of Fe, gamma-Fe2O3 and Fe3O4 can be obtained.

The invention discloses a cyclic N-heterocyclic bis-carbene metal complex linked by ether and a method for preparing the same. The method comprises the steps of: adding imidazole or benzimidazolium salt linked by the ether and a metallic compound into a reactor according to the mol ratio of 0.5 to 3-2 to 5mol, under the protection of inert gas; and reacting for 12 to 24 hours at a temperature of between 0 and 100 DEG C, after dissolving the mixture by a dewatered high-purity organic solvent; filtering and naturally volatilizing the reacted mixture and solvent to produce a carbene metal complex. The cyclic N-heterocyclic bis-carbene metal complex linked by the ether, which is prepared with the method, is mainly used for preparing fluorescent materials.