1027results about How to "No breakage" patented technology

The invention provides a preparation method of a bonding sheet forming a circuit substrate. The method comprises a step of pretreating a glass fabric by use of a pretreatment glue solution of which the dielectric constant (Dk) is the same with or close to the Dk value of the adopted glass fabric. The invention also provides a bonding sheet and a circuit substrate prepared by the method. The preparation method of the circuit substrate provided by the invention does not need equipment transformation and adjustment, the cost is relatively low, the difference of the dielectric constant of the prepared circuit substrate in the longitudinal direction and latitudinal direction is less, and the problem of signal delay can be effectively solved.

The invention provides a foldable display device which comprises a shell, a middle frame, a display panel and a surface frame. The shell comprises a shell bending device, the middle frame is mounted to the shell, the middle frame comprises a middle frame bending device opposite to the shell bending device, the display panel is mounted to the middle frame and comprises a panel bending area oppositeto the middle frame bending device, the surface frame is mounted to the shell, and the display panel is clamped into an opening. When the display panel is bent, the middle frame bending device and the shell form a cavity, and the panel bending area is bent and then placed into the cavity.

The invention provides a valve body and bonnet connection torsion dispensing assembly machine, belongs to the technical field of valve production devices and solves problems that the existing valve body and bonnet connection assembly machine cannot achieve automatic gluing. The valve body and bonnet connection torsion dispensing assembly machine comprises a worktable and a support fixed on the worktable, wherein a lower die body is arranged on the worktable, an upper die body is arranged right above the lower die body and is fixed on the lower portion of a torsion control mechanism used for controlling rotating of the upper die body, a lifting cylinder is fixedly connected onto the support, a lifting sliding table is fixedly connected at the end of a piston rod of the lifting cylinder, the torsion control mechanism is fixed on the lifting sliding table, and a dispensing mechanism is arranged on the side portion of the lower die body. The valve body and bonnet connection torsion dispensing assembly machine has the advantages of having double functions of valve bonnet screwing and gluing, being high in automation and work efficiency and the like.

The invention relates to a multi-dimensional folded flexible solar battery pack and a manufacturing method thereof and belongs to the field of a solar photovoltaic technology. The technical problems that an interior metal lead in a flexible solar battery pack is easy to break and the like are solved. According to the multi-dimensional folded flexible solar battery pack, flexible solar battery chips are packaged between a front plate and a rear plate through an adhesive film; multiple flexible solar battery chips are in parallel connection through a lead string, so as to form a flexible solar photovoltaic array; an area for folding a battery pack is reserved between adjacent flexible solar battery chips; and an inner slot for storing the lead is arranged in the area for folding. The folding life of the multi-dimensional folded flexible solar battery pack designed by the invention is long; the folding times can reach above 4000 times, without the breaking condition of the metal lead; and the service life of the battery pack is ensured.

The invention relates to TiZrHfNb based high-entropy alloy with nitrogen and oxygen alloyed together and a preparation method thereof. Particularly, the tensile strength and tensile ductility of the alloy are remarkably improved by simultaneously microalloying N and O elements. The preparation method includes the following steps that metal raw materials of Ti, Zr, Hf and Nb are accurately weighed according to the molar ratios after oxide skin is removed; other added elements are accurately weighed according to the molar ratios after oxide skin is removed and the elements are washed with alcohol; the N element is added in the form of nitride, and the O element is added in the form of oxide; and target alloy is smelted in a nonconsumable vacuum arc furnace or cold crucible shower furnace, and the alloy is obtained through vacuum suction casting or casting equipment. The tensile property of the high-entropy alloy is improved remarkably by simultaneously adding the N and O elements, the tensile strength of (TiZrHfNb)97.5(NO)2.5 based high-entropy alloy reaches 1300 MPa, meanwhile, the tensile ductility exceeds 15%, the work-hardening rate is low, and the comprehensive tensile property is excellent.

The invention relates to a Mxene@chitosan@polyurethane foam three-dimensional composite material and a high-sensitivity and high-reliability piezoresistive sensor constructed by using the material, and preparation methods thereof. The structure control of a conductive network and micro-cracks in the sensor and introduction of the structure system of Mxene@chitosan make a polyurethane skeleton firmly and closely coated with a conductive filler, so the stability of long-term recycling is greatly improved; and Mxene nanosheets have a small size, and the number of the micro-cracks produced by thepolyurethane-coated skeleton is high, and the detection under small strain is accurate. The Mxene@CS@PU composite three-dimensional structure with good stress strain can be obtained by optimizing theimpregnation frequency (1 to 5, and preferably 2) of a conductive filler in the preparation process of the sensor and the treatment steps of a technology of centrifugal removal of the Mxene nansheetsnot completely coating the skeleton and the drying temperature in the preparation process.

A surface-coated cutting tool which has excellent chipping resistance and wearing resistance in high-speed cutting processing such as high-speed gear cutting processing, high-speed milling processing,and high-speed drilling processing. The surface-coated cutting tool comprises a tool base, e.g., a cemented carbide base, cermet base, or high-speed tool steel base, and at least a hard coating layerformed on a surface of the tool base and having a multilayer structure composed of a thin layer (A) and a thin layer (B) alternating therewith. The thin layer (A) is constituted of an (Al,Cr,Si)N layer satisfying the empirical formula ¢AlXCrYSiZ!N (wherein 0.2 <= X <= 0.45, 0.4 <= Y <= 0.75, 0.01 <=Z <= 0.2, and X+Y+Z=1 in terms of atomic ratio), and the thin layer (B) is constituted of an (Al,Ti,Si)N layer satisfying the empirical formula ¢AlUTiVSiW!N (wherein 0.05 <= U <= 0.75, 0.15 <= V <= 0.94, 0.01 <= W <= 0.1, and U+V+W=1 in terms of atomic ratio).

The invention relates to the technical field of display, and discloses a cover plate, a preparation method of the cover plate, a display panel and a display device. The bending reliability and deformation recovery reliability of the cover plate are improved. The cover plate comprises a transparent substrate layer and a hardening layer located above the transparent substrate layer, wherein the transparent substrate layer comprises a bent area and a non-bent area; soft hardening materials and rigid hardening materials are alternately arranged on the portion, on the bent area, of the hardening layer; the portion, on the non-bent area, of the hardening layer is provided with a rigid hardening material. In the cover plate, the bent area is provided with the flexible hardening materials so thatthe hardening layer breaking phenomenon cannot occur when the bending radius of the bent area of the cover plate is small, and then the bending reliability of the cover plate can be improved. Meanwhile, the rigid hardening materials of the bent area and the rigid hardening material of the non-bent area are arranged so that the surface hardness of the cover plate can be guaranteed, the cover platecan still restore a flat state after dynamic bending or long-time static bending.

The invention provides a two-phase composite compact ceramic oxygen-permeable film and production method thereof. The invention is characterized in that: a perovskite-type lanthanum manganate-based composite oxide is mixed with a stabilized fluorite-type zirconium dioxide at a volume ratio of 0.6-1.8:1 to obtain a ceramic blank, the ceramic blank is further sintered to obtain a slab-like or a hollow fiber-like self-support compact ceramic oxygen-permeable film or porous support-loaded compact ceramic oxygen-permeable film with a thickness of 0.001-10 mm; the perovskite-type lanthanum manganate-based composite oxide is Ln1-xAx-yMnO3, wherein Ln is La, Pr, Nb, Ce, Gd, Dy, Sm or a mixture thereof, A is Sr or Ca, x is 0.1-0.4, y is 0-0.10; the stabilized fluorite-type zirconium dioxide is RzZr1-zO2, wherein R is Y, Sc, Yb, Er, Gd, Eu, Dy or a mixture thereof, and z is 0.10-0.26. The oxygen-permeable film is stable and kept in high oxygen permeability during long-term storage in the atmosphere of CO2 and H2O; and has the advantages of rich raw material, low price, non-toxicity and harmfulness, and environmental friendliness.

The inventiondiscloseslean ceramic powder size for direct-forming 3D ceramic printing. The lean ceramic powder size is prepared from lean ceramic powder, a composite thixotropic agent, a dispersing agent, a thickening agent, a levelling agent and deionized water in a mass ratio being (65-75):(0.2-0.6):(0.9-1.3):(2.0-5.0):(0.5-1.5):(15-30); the lean ceramic powder is one or combination of Al2O3, ZrO2, SiC and Si3N4. The invention further discloses a preparation method and an application of the lean ceramic powder size. The lean ceramic powder size has high solid content and high shear thinning performance, is suitable for preparation of 3D printing ceramic devices with direction forming process and can be gradually dried and cured in a 3D printing process at the room temperature, and accordingly, a set structure is obtained without collapse, the printing precision is high, and the requirement for 3D printing direct-forming can be well met.

The invention provides a low-temperature phase-change thermal storage microcapsule as well as a preparation method and an application thereof. The microcapsule has a core-shell structure and belongs to low temperature thermal storage materials. The preparation method includes the following steps: by taking the n-octadecane as a thermal storage medium, dispersing the n-octadecane into the water solution, and adding an emulgator to emulsify to obtain an emulsion; by taking phenyl trimethoxysilane as a polymeric monomer, with the help of the O / W miroemulsion template effect, hydrolytically polymerizing the phenyl trimethoxysilane on the surface of the n-octadecane micro droplets to obtain the silicon dioxide, and then finishing the cladding and self-assembling process; and finally, washing and drying to obtain the microcapsule. The method disclosed by the invention has the characteristics of being simple in process and easy to control. The microcapsule disclosed by the invention has an integral spherical shape, a smaller particle size and good uniformity; and the microcapsule also has a higher thermal storage density, which can be applied in the fields of temperature self-operating fabrics, wall filling materials, solar energy development and utilization and industrial waste heat recovery.

The invention discloses an automatic gluing and plate arranging machine, and relates to the technical field of wood-working machining. The automatic gluing and plate arranging machine comprises a lath pushing device and a plate arranging device. The lath pushing device comprises a lath supporting frame, the lath supporting frame is provided with a plurality of conveying rollers and a plurality of conveying chains, and pushing plates are arranged on the conveying chains. A pressing plate support is arranged above the discharging position of the lath supporting frame and provided with a plurality of gear racks in meshing connection with gears. The upper end of one gear rack is connected with a pressing plate power cylinder, and the lower ends of the gear racks are connected with supporting plates. A plurality of pressing plates are arranged at the bottoms of the supporting plates, and a guide plate inclined downwards is arranged at the bottom of each pressing plate. The plate arranging device comprises a plate arranging table and a plurality of conveying belts arranged on the plate arranging table at intervals. Compared with the prior art, laths are conveyed to the conveying belts by the conveying chains; all the laths conveyed to the conveying belts are moved and turned by 90 degrees by the guide plates at the bottoms of the pressing plates and cannot be damaged; plate blocking and shutdown are avoided; and the plate arranging speed is greatly improved.

The invention relates to a modularized wire pavement head for automatically paving a composite material and a method. A six-axial robot-based platform design is used for paving a composite material member. The modularized wire pavement head is mainly characterized in that the wire pavement head is based on a completely modularized design, and comprises a wire coil mounting module (C), a gasket paper collecting module (D), a tension detection module (B), a tow steering module (A), a shearing, clamping and tow-reconveying module (E), a heater (F), a compression roller and the like. The modularized wire pavement head has the capability of simultaneously paving 8 bundles of composite material presoaking yarns; each tow is independently controlled; shearing of the tows and reconveying after shearing can be independently carried out; on the basis of rapid-exchange structure design, mounting and dismantling of the wire pavement head and mounting and exchanging of the tows can be conveniently carried out; on the basis of bared yarn duct design, cleaning of the wire pavement head can be conveniently carried out; and the widths of the used composite material presoaking yarns are 3.17mm, 6.35mm and 12.7mm.

The invention discloses a fixed type toughened glass crushing escape apparatus which is fixed on a base on toughened glass and is provided with a through hole which is perpendicular to the surface ofthe toughened glass; a hard impact rod with a pointed end is arranged in the through hole; the tail end of the impact rod, which is far away from the surface of the toughened glass, is connected witha strike cap; a resetting mechanism is arranged between the base and the strike cap; and a protective sleeve is arranged outside the cylinder of the base. The invention provides the fixed escape apparatus which can quickly crush the toughened glass without finding in the process of escape, thereby greatly shortening the escape time; because a beating mode is adopted and the impact rod is perpendicular to the surface of the toughened glass, the impact force required for crushing the toughened glass is effectively reduced, the slipping phenomenon in the process of use is avoided, and the successratio of crushing the toughened glass by weak people in the process of escape is ensured; and the design of the protective sleeve can effectively avoid the deadweight loss caused by wrongly beating.The fixed toughened glass crushing escape apparatus is suitable for quick escape by crushing the toughened glass under the emergency condition.

A method for lost foam casting of a bimetal bi-solution composite crusher hammer head comprises arranging a hammer handle downwards and a working face upwards in a pattern assembly composed of patterns and formed by a main runner, an ingate, an overflow groove and a runner in connection, the overflow groove being of a hammer handle material, the upper port plane of the gate being the casting boundary of the hammer handle material, and the upper part being the down gate and the main runner of a hammer head material; smelting the hammer head material and the hammer handle material in two furnaces respectively, taking out the hammer head material from the furnace when the hammer head material reaches 1,450 DEG C and taking out the hammer handle material from the furnace when the hammer handle material reaches 1,550 DEG C; casting molten steel to the hammer handle material at 1,450 DEG C, and blocking the molten steel flowing out from the overflow groove by use of refractory clay outside a casting frame, and then casting molten steel to the hammer head material at 1,350 DEG C until reaching the top of the sprue; and cutting the gating-feeder when the casting is solidified and cooled to obtain the bimetal composite hammer. The inventive method is simple in process and stable in quality and has the production efficiency doubled.

The invention discloses an easy-to-use electric safety grounding wire rack. The first bracket and the second bracket are fixed by a cross bar, and the first bracket is also movably connected to one end of a bobbin through a bearing seat, and the bobbin The left and right relative positions of the left and right are respectively sleeved with a first line retaining plate and a second line retaining plate, the bobbin is movably connected with the second support through a bearing seat arranged on the second support, and a turntable is fixed on the right end of the bobbin , and the edge of the turntable is movably connected to the handle through the bearing seat, the side wall of the second bracket is also fixed with a spring seat, and the spring seat is fixedly connected with the locking spring, and the second wire retaining plate is evenly opened with A locking hole suitable for the locking spring, the winding shaft is evenly wound with a grounding wire, and the other end of the grounding wire is fixedly connected to the clip, and the clip is sleeved on the fixing tube, and one end of the fixing tube Also secured with a ground spike. The ground wire frame has a simple structure and is more convenient to use.

The invention relates to a novel biologically degradable macromolecular external securing material for medical purposes, wherein the essential component of the material is polylactic acid, or can be added poly gamma-caprolactone, inorganic mineral substance (such as calcium carbonate, titanium white, talcum powder, barium sulfate, montmorillonite), silicon alky coupling agent or coloring agent. The invention also discloses its preparation process.

The making process of soluble salt core for extrusion casting includes the following steps: mixing roasted marketable table salt in 70-85 wt%, high aluminum bauxite in 7-16 wt%, water glass in 6-10 wt% and water in 2-5 wt% successively and fully and letting stand for over 5 min; applying the mixture into metal mold with required complicated inner cavity shape and pressing in press for densifying, blowing CO2 gas and demolding; and stoving the soluble salt core at 150 deg.c or over for over 2 hr. The soluble salt core can bear the high pressure and high temperature of extrusion casting and can obtain casting with high size precision and high surface smoothness. After the casting is set in water, the soluble salt core will dissolve and disintegrate well. The soluble salt core has less making steps, low production cost, and less corrosion to equipment.

The present invention relates to an ink-jet printing electric conduction ink capable of being subjected to room temperature sintering, and applications thereof. According to the present invention, silver nanoparticles with polyvinylpyrrolidone wrapped on the surface, a polymer resin, a solvent, a surfactant, a preservative, an antifoaming agent and a humectant are uniformly mixed to obtain the ink-jet printing electric conduction ink; the ink-jet printing electric conduction ink can be printed on a printed circuit board so as to prepare the pattern of an electric conduction trace, a treatment liquid is coated on the printed circuit board having the electric conduction trace pattern, and the electric conduction trace pattern printed through the ink-jet printing electric conduction ink is subjected to chemical sintering through the treatment liquid at a room temperature so as to obtain the electric conduction trace having good electric conduction property; and the ink-jet printing electric conduction ink has characteristics of low cost, excellent printing suitability and excellent durability, and can be matched with the room temperature sintering method of the present invention so as to make the printed electric conduction pattern achieve the good electric conduction property at the room temperature.

The invention relates to an underground gasification well cementing method and a well structure. The method comprises the following steps: descending a well-cementing sleeve into a well, stopping descending the well-cementing sleeve until the bottom end of the well-cementing sleeve enters into a coal seam for a set depth, and connecting the well-cementing sleeve with the well wall of the well, wherein the well-cementing sleeve at least comprises a flexible sleeve, the bottom end of the telescopic flexible sleeve forms a bottom end of the well-cementing sleeve, and the length of the telescopic flexible sleeve is greater than or equal to the sum of the maximum height of a water diversion fissure zone above the coal seam and the set depth. The well structure comprises a well which is communicated with the coal seam from the ground and the well-cementing sleeve, wherein the well-cementing sleeve is connected with the well wall of the well; the well-cementing sleeve comprises the telescopic flexible sleeve, the bottom end of the telescopic flexible sleeve is positioned at the set depth of the coal seam, and the length of the telescopic flexible sleeve is greater than or equal to the sum of the maximum height of the water diversion fissure zone above the coal seam and the set depth. The method and the well structure are capable of preventing well-cementing sleeve breakage caused by fissure of stratum above the coal seam in each direction.

A wire having excellent operability while ensuring flexibility at the distal end, and having improved bonding strength between a first wire part and a second wire part. It has a wire main body including a linear first wire part arranged on the distal side and a linear second wire part arranged on the proximal side of the first wire part. A coil having X-ray contrast properties is preferably provided on the outer periphery of the distal end portion of the first guide wire portion. The base end portion of the first guide wire part preferably has a constant outer diameter everywhere along its length direction, and the front end part of the second guide wire part preferably has a tapered part whose outer diameter gradually increases from the front end to the base end direction. constitute. Preferably, the outer diameter of the proximal end of the first wire guide part and the outer diameter of the distal end of the second guide wire part are the same. The outer diameters of the two guide wire parts are joined by welding on the same end surface, and a metal covering layer is preferably formed on the outer periphery of the joint part to relax the outer peripheral surface of the base end part of the first guide wire part and the outer peripheral surface of the taper part. Angle difference between.

The invention discloses a polarization maintaining optical fiber beat length measuring apparatus, which comprises an optical path system, a force application device and a data acquisition and processing system. The optical path system containing a light source, a crystal polarizer, a focusing lens and a crystal polarization analyzer has the function of providing linearly polarized light for measurement; the force application device which adopts a travel mechanism with a high-precision bidirectional step motor, a clamp mechanism with protective measures, and a force application mechanism with a micrometer has the function of fixing a polarization maintaining optical fiber to be measured, applying a due radial pressure along the length direction of the polarization maintaining optical fiber to be measured in a mobile mode to enable the output optical power which has passed through the polarization maintaining optical fiber to be measured to have a periodical variation; the data acquisition and processing system picks up the optical power outputted by the measured optical fiber through an optical power meter and obtains the average beat length of the measured polarization maintaining optical fiber and the optical power variation curve with the acquisition time after a computer carries out corresponding processing and computation of the output of the optical power meter. The polarization maintaining optical fiber beat length measuring apparatus has the advantages of simple structure, convenient operation and high measurement precision.

The invention discloses thermosensitive ceramic powder, a NTC thermosensitive chip, a temperature sensor and a preparation method. The ceramic powder disclosed by the invention is prepared from the following components in percentage by weight: 18-38% of manganese dioxide powder, 12-20% of cobalt oxide powder, 4-14% of iron oxide powder, 21-41% of nickel oxide powder and 2-10% of rare earth oxide powder. The temperature sensor disclosed by the invention has the advantages of perfect softness, bending resistance, vibration resistance, wear resistance, corrosion resistance and the like, and is adapted to quite harsh environment of oil stain, EMI, mechanical pressure and the like in a motor; the temperature sensor is required to work stably for a long time in bad conditions.

The invention provides an electromagnetic wave protection film capable of being repeatedly pasted and used. In the electromagnetic wave protection film, a surface of a base material is provided with one insulated flexible bonding layer. A surface of the insulated flexible bonding layer is provided with at least one metal layer. A metal layer surface is provided with one pressure-sensitive-type conducting resin layer. A surface of the pressure-sensitive-type conducting resin layer is provided with a protection film. Compared to a tedious heating lamination post curing technology, by using the film of the invention, only a portion which needs the electromagnetic wave protection film is pressed, a processing application technology is simple, and more laminated machines, baking ovens and other equipment are not needed; redundant personnel setting and complicated operation steps are not needed, a tolerable error rate is high, and energy losses and a possibility of generating danger in a subsequent operation can be effectively reduced; and more importantly, after actual positioning and pasting are wrong, repeated positioning usage can be stripped so that a waste edition which is generated because pasting is wrong is not generated. The protection film can be widely applied to portions of a mobile phone, a camera, a medical apparatus, a laptop and the like, such as a FPC soft board, PCB hard board and the like, wherein the portions needs electromagnetic protection.

The invention discloses laminated glass, comprising an upper super-white coated glass layer, SGP (SentryGlas Plus) film and a lower super-white coated glass layer. The invention also discloses a preparation method of the laminated glass, comprising the steps of providing a raw sheet, cutting, polishing edge, washing, tempering, coating, washing, laminating, pressing primarily, vacuumizing, heatingand pressurizing in a high-pressure kettle, holding the temperature and pressure in the high-pressure kettle, lowering the temperature and pressure in the high-pressure kettle, removing from the kettle, trimming and dressing, finishing, packaging, and allowing the finished glass to leave a factory. The heating mode is modified to a mode with a heating tube and a convection fan, so that heating uniformity of glass is improved, glass heating efficiency is improved, SGP laminated glass has better visible light transmittance and strength, production time of the SGP laminated glass is shortened, and energy consumption is lowered.

The invention discloses an examination method for rationality of the variability of continuously reinforced concrete. The examination method can examine the tensile strength, elastic modulus and drying shrinkage strain linear expansion coefficient of the concrete and rationality of the variability of a friction resistance coefficient of a surface layer and a base layer and can control the number of dense cracks, so the method can control the number of thrusts and ensures that a continuously reinforced concrete pavement has no serious thrust damage in the designed life, thereby ensuring the service life and driving comfortableness of the pavement. After the method examines the tensile strength, elastic modulus and drying shrinkage strain linear expansion coefficient of the concrete and rationality of the variability of the friction resistance coefficient of the surface layer and the base layer, designing of the material composition of concrete can be optimized according to requirements of variability, so the service life of the pavement can be improved in the aspect of materials. The examination method is simple in thinking and is short in examination time and convenient to use after programmed into a computer program.

The invention discloses application and a method for temporarily reinforcing cultural relics in an excavation site by one type of reinforcing material. The reinforcing material is selected one or more of 4-tert-butylcyclohexanol, coumarin and ethyl maltol. The reinforcing method comprises the following steps: heating and melting or dissolving one or the mixture of more than two of 4-tert-butylcyclohexanol, coumarin and ethyl maltol into an organic solvent to obtain a reinforcing solution; covering the cultural relics to be reinforced with fiber textiles, and pouring or brushing the prepared reinforcing solution on the fiber textiles or directly brushing the reinforcing solution on the excavated cultural relics; and naturally volatilizing the organic solvent in the reinforcing solution, and cooling and condensing to temporarily reinforce the cultural relics. The reinforcing material is safe and toxin-free and has low price, and can be in direct contact with a human body; and compared with newly-developed menthol and a derivative reinforcing material thereof, the harsh environments including high heat and the like can be met, and the problems that the melting point of menthol is low, the volatilization is too fast and the like are solved.

The invention relates to a transdermal iontophoresis administration apparatus and an administration method based on metallic porous micro needle arrays. In the apparatus, a first metallic porous micro needle array is connected with an anode of a medical physiological electrode through welding, a second metallic porous micro needle array is connected with a cathode of the medical physiological electrode through welding, and the first metallic porous micro needle array is not connected with the second metallic porous micro needle array. The anode and cathode of the medical physiological electrode are correspondingly connected with a controllable pulse power supply. The micro needle arrays penetrate skin and damage cuticle tissue structure, holes of the micro needle arrays provide administration channels for liquid medicaments, and two ends of the micro needle arrays are powered up. Medicine can permeate into a human body under the effects of electric fields and electroosmotic flow.

The invention discloses a shell-crosslinked polymeric micelles by using metal nanoparticles as a crosslinking agent and a preparation method thereof. The shell-crosslinked polymeric micelles by using metal nanoparticles as a crosslinking agent consist of polymer micelles and the metal nanoparticles coated on the shells of the polymer micelles. The method for preparing the shell-crosslinked polymeric micelles comprises the following steps: performing functionalized modification on the tail end of an amphiphilic polymer so as to form a functional group capable of reacting with the metal nanoparticles; self-assembling the amphiphilic polymer containing the reactive functional group to form polymeric micelles, and positioning the reactive functional group on the shell surfaces of the polymeric micelles; adding the metal nanoparticles and chemically combining the metal nanoparticles with the reactive functional group so as to form the polymeric micelles crosslinked by the metal nanoparticles. The obtained polymeric micelles have excellent biocompatibility, anti-dilution stability and bio-responsibility, and have wide application prospect in gene and medicament delivery, biosensor and other fields.

The invention discloses a preparation method of motor iron cores. The preparation method mainly comprises the steps that 1, a soft magnetic metal strip is laminated and fixed; 2, lamination is cut by lasers to obtain strip slices; 3, the strip slices are stacked to a certain thickness, and atmosphere annealing is conducted; 4, the strip slices are immersed into a bonding agent for curing, and paint spraying is conducted. The preparation method has the advantages the motor iron cores are prepared through laser cutting, the machining precision is high, no rough edge exists, small internal stress is generated, and the motor iron cores in complex shapes can be machined. By preparing the motor iron cores through the laser method, the production technology can be simplified, the machining speed is increased, the cost is reduced, and the method has a wide application prospect in the field of high-speed motor manufacturing.