26results about How to "Accelerated dissipation" patented technology

The invention relates to the technical field of polymer composite material preparation, in particular to a super-tough core-shell stereocomplex polylactic acid-based composite material and a preparation method thereof. The super-tough core-shell stereocomplex polylactic acid-based composite material is prepared from the following raw materials in parts by mass: 70 to 100 parts of polylactic acid and 0 to 30 parts of the modified elastomer in claim 4, and the dosage of the modified elastomer is not 0; the modified elastomer is prepared by melting and blending stereocomplex polylactic acid powder and a functional elastomer copolymer; the stereocomplex polylactic acid powder is prepared by reactive melt blending of PLLA and PDLA in an equal mass ratio or an equal molar ratio. The prepared super-tough core-shell stereocomplex polylactic acid-based composite material has excellent tensile strength and impact resistance, can be applied to the field of engineering plastics such as automobile parts, electronic and electric appliance shells, household products, catering tableware and the like, and has remarkable environmental protection benefits and industrial popularization value.

The invention relates to a cleaning agent used after SiC substrate grinding and a preparation method thereof, and relates to the field of semiconductor cleaning agents, and the cleaning agent is prepared from the following raw materials by mass: 4-8% of an anionic surfactant, 2-6% of a nonionic surfactant, 2-6% of a cleaning auxiliary agent, 8-12% of sodium hydroxide, 2-4% of a bio-based modified antistatic agent, and the balance of water. The preparation method comprises the following steps: heating water, adding sodium hydroxide, stirring, adding the cleaning aid, stirring, adding the premixed anionic surfactant and nonionic surfactant, stirring, adding the bio-based modified antistatic agent, stirring, cooling, and filtering to obtain the cleaning agent for grinding the SiC substrate. The cleaning agent has a good cleaning effect, can effectively remove impurities after grinding, and meets the requirement of the semiconductor industry for high-quality cleaning of SiC wafers.

The application discloses a concrete prefabricated column reinforcing anti-misplacement structure and a mounting method thereof, and relates to the technical field of building structure reinforcement, which comprises a plurality of prefabricated columns, reinforcing members connected with the prefabricated columns, and connecting members arranged between the prefabricated columns and the reinforcing members. The application comprises four steps: S1, preparing vertical prefabricated columns and horizontal prefabricated columns, and placing the vertical prefabricated columns and the horizontal prefabricated columns to predetermined positions to ensure the verticality and the horizontality; S2, mounting vertical connecting members and horizontal connecting members to the vertical prefabricated columns and the horizontal prefabricated columns to ensure the connection with longitudinal reinforcement and horizontal reinforcement; S3, connecting reinforcing bodies with the vertical connecting members and the horizontal connecting members; and S4, arranging first reinforcing plates and second reinforcing plates on surfaces of the vertical connecting members and the horizontal connecting members respectively, and tightening steel ropes to complete the mounting. The multiple connections among the structures can significantly improve the stability and the bearing capacity of the concrete prefabricated columns, and reduce the damage caused by external factors such as earthquakes and wind loads.

This utility model discloses a novel indwelling needle patch for preventing phlebitis, comprising a patch body, an adhesion component on one side of the patch body, and a limiting component on another side of the patch body; the adhesion component includes a groove on the top of the patch body, within which a preventive layer is disposed, the preventive layer being used at least to prevent phlebitis; an adhesion structure and a fixing structure, the adhesion structure being disposed on both sides of the patch body, the adhesion structure being used at least to ensure that the patch body adheres to the patient's skin, and the fixing structure being disposed on both sides of the adhesion structure. This utility model, through its adhesion component, can prevent phlebitis through the preventive layer while ensuring a better fit between the patch body and the indwelling needle, thereby preventing insufficient fit between the patch body and the indwelling needle, which could increase the risk of infection at the puncture site, thus increasing the practicality of the indwelling needle patch.

The invention provides a flame-retardant antistatic nylon fiber with a skin-core structure and a preparation method of the flame-retardant antistatic nylon fiber, and belongs to the technical field of nylon fibers. The flame-retardant antistatic nylon fiber comprises an antistatic nylon skin layer and a flame-retardant nylon core layer, the outer surface of the flame-retardant nylon core layer is coated with the antistatic nylon skin layer, the antistatic nylon skin layer comprises a nylon 6 matrix and an antistatic agent, and the antistatic agent is aniline modified zirconium phosphate; wherein the aniline modified zirconium phosphate is obtained by carrying out in-situ polymerization on aniline monomers between stripped zirconium phosphate layers. The flame-retardant antistatic nylon fiber is obtained through sheath-core composite melt spinning. According to the invention, the antistatic agent and the flame retardant are efficiently and stably introduced into the nylon matrix, and the synergistic effect of the antistatic agent and the flame retardant is realized, so that the fiber has better spinnability and mechanical property, and meanwhile, the long-term effect and durability of the function are ensured.

This invention discloses a carbide-reinforced high-entropy alloy wear-resistant and corrosion-resistant coating, its preparation method, and its application, belonging to the field of materials surface engineering technology. The preparation method of the carbide-reinforced high-entropy alloy wear-resistant and corrosion-resistant coating includes the following steps: fixing a high-entropy alloy cathode target and a carbide cathode target on a DC target and an RF target respectively, and performing magnetron sputtering co-deposition on the substrate surface to obtain the carbide-reinforced high-entropy alloy wear-resistant and corrosion-resistant coating. This invention utilizes magnetron sputtering technology to prepare wear-resistant and corrosion-resistant high-entropy alloy composite coatings reinforced with three carbides—WC, Cr3C2, and TiC—on the surfaces of different substrate materials. The high strength and high hardness of the three carbides not only improve the mechanical properties of the composite coating, but also enable the WC, Cr3C2, and TiC carbide-reinforced wear-resistant and corrosion-resistant coatings to possess microhardnesses as high as 8.58 GPa, 7.38 GPa, and 7.15 GPa, respectively.

The utility model relates to the technical field of electric appliances, and provides an arc extinguish chamber structure. Comprising a first shell and a second shell which are oppositely arranged, and a split combination part which jointly form a hollow arc extinguishing cavity, the plurality of arc extinguishing grid layers are alternately arranged in the arc extinguishing cavity to form a continuously turning arc path so as to prolong the arc moving distance, and are connected through the inclined grid arms; the arc guide assembly includes a first guide at the bottom of the housing and a second guide between the first guide and the inclined grid arm. The first guiding piece generates directional airflow under the effect of arc heat energy, and the arc is driven to move, be segmented and be extinguished along a steering path. According to the utility model, a continuous steering arc path is constructed through the split type shell and the multilayer grids, and the arc is driven to move and divide by combining the directional airflow generated by the arc guide assembly, so that the arc extinguishing efficiency and the working reliability of the arc extinguish chamber are improved.

This invention provides a lithium aluminum silicon glass-ceramic composite material synergistically reinforced with pre-oxidized cubic boron nitride and carbon fiber, and its preparation method. LAS powder and pre-oxidized cubic boron nitride powder are mixed uniformly, and then an aqueous dispersion containing a dispersant is added. The mixture is ball-milled to obtain a slurry, which is then uniformly coated onto carbon fiber cloth. After thorough impregnation, the slurry is dried to obtain a prepreg. Multiple layers of prepreg are stacked in the same direction to obtain a laminate, which is sintered under vacuum or an inert atmosphere. After cooling, a Cf / LAS composite material is obtained. By designing a special particle structure of "boron oxide-coated cBN core," a tight bond between the reinforcing phase and the matrix is ​​achieved, and the overall interface system of the composite material is precisely controlled, ultimately obtaining excellent comprehensive properties of high strength, high toughness, high hardness, and low wear rate.

The invention discloses an anti-fog automobile lamp and relates to the technical field of automobile lamps, an automobile lamp shell and an external shell form a double-layer shell structure design, the automobile lamp shell and an automobile lamp body are protected, external damage is reduced, and therefore the service life of equipment is prolonged; the plastic plate is of an inclined structure, the plastic plate can be attached to the inner wall of the external shell conveniently when the automobile lamp shell is placed in the external shell, so that the redundant space between the shells is reduced, the stability of the automobile lamp shell in the external shell is improved, when the automobile lamp shell enters the external shell, extrusion butt joint is carried out on a plate face groove through the fixing assembly, and the automobile lamp shell is prevented from being damaged. The side, close to the connecting end, of the outer portion of the double-layer lampshade is of a straight face design, the other side of the outer portion of the double-layer lampshade is of a micro-curved-surface structure design, the curved-surface side of the double-layer lampshade faces the outside, and the effect of actively breaking water drop film forming is achieved through the curved-surface structure.

The application discloses a rail corrugation suppression device and a mounting method, and belongs to the technical field of rail transit. The rail corrugation suppression device comprises a suppression mechanism, the suppression mechanism is symmetrically arranged on both sides of the rail waist of a rail, the bottom of the rail is provided with a fixing mechanism for fixing the suppression mechanism on the rail, an energy consumption box is arranged on the fixing mechanism, and the energy consumption box is located directly below the rail. The suppression mechanism comprises a plurality of box bodies arranged in a linear array, a plurality of first suppression layers and second suppression layers are arranged in the box bodies, and the first suppression layers and the second suppression layers are arranged at intervals. The rail corrugation suppression device and the mounting method can solve the problem that the existing rail corrugation suppression device has poor damping effect on rail vibration and noise.

This invention relates to a triangular prism-type tuned mass damper suitable for large-span cantilever structures, comprising a triangular prism box (1), a particle damping unit (4) disposed within the triangular prism box (1), and a steel mass block (3). A high-damping spring (2) is located below the triangular prism box (1). The particle damping unit (4) includes a particle damping chamber (5), three different sized particle balls, and a foamed rubber pad (9). When the structural vibration amplitude is small, the particle balls dissipate energy by compressing the foamed rubber pad and rolling; when the structural vibration amplitude is large, the particle balls dissipate energy by colliding and compressing the foamed rubber. Compared with the prior art, this invention achieves a phased energy dissipation mechanism while solving the problems of narrow vibration reduction bandwidth, large motion stroke, and noise generated by particle collisions in traditional mass tuned dampers.

The invention relates to the technical field of PET polyester, and discloses an environment-friendly high-thermal-conductivity polyester material and a preparation process thereof.The polyester material comprises, by weight, 100 parts of polyethylene glycol terephthalate, 10-40 parts of hexagonal boron nitride and 0.5-2.5 parts of sodium polyethyleneimine urea carboxylate; polyethyleneimine ureido sodium carboxylate contains a large amount of active amine activity and sodium carboxylate groups, surface modification of boron nitride is effectively achieved, dispersity of boron nitride can be improved, compatibility with PET is better, the polyester material can keep good mechanical property and tensile strength, and the heat conductivity coefficient and heat conduction and heat dissipation performance of the material are improved. Meanwhile, the surface water contact angle of the polyester material is reduced, and the antistatic performance of the polyester material is improved.

This invention provides an antistatic fabric based on modified acrylic fiber and its preparation process, belonging to the field of textile fabric technology. The process includes the following steps: first, preparing modified acrylic fiber and organosilicon quaternary ammonium salt modified CNW; then, mixing and stirring the modified acrylic fiber, DMF, and organosilicon quaternary ammonium salt modified CNW to obtain a spinning solution; mixing anhydrous ethanol and organosilicon quaternary ammonium salt modified CNW, and ultrasonically treating to obtain a dispersion; in a conjugate electrospinning device, feeding the spinning solution and dispersion into two sets of needles respectively, and electrospinning the spinning solution to form nanofibers under the action of a high-voltage electric field; feeding cotton yarn into the electric field region, causing the nanofibers to spirally wind around the surface of the cotton yarn and form a coating shell; and electrostatically spraying the dispersion to deposit the organosilicon quaternary ammonium salt modified CNW onto the surface of the coating shell; collecting and winding to obtain a fiber core-spun yarn, and weaving the fiber core-spun yarn to obtain the antistatic fabric. This invention can improve the antistatic performance of the fabric while also possessing certain antibacterial properties.

The utility model provides a hub motor direct-drive electric bicycle driving assembly which comprises an outer frame, a motor body is arranged in the outer frame, a supporting rod is fixedly connected to the outer side of the outer frame, a protection frame is fixedly connected to the supporting rod, a plurality of heat dissipation pipes are fixedly connected to the outer side of the outer frame, and the heat dissipation pipes are fixedly connected to the outer side of the outer frame. And the end part of the radiating pipe is fixedly connected with an expansion pipe which is vertically arranged and is wide at the lower part and narrow at the upper part. Compared with the prior art, the heat dissipation device has the advantages that by arranging the heat dissipation pipe, the expansion pipe, the supporting net and other structures, when the motor body drives the electric bicycle to move, external airflow drives the impeller to rotate, the impeller disturbs air flow at the position of the expansion pipe, hot air in the outer frame is promoted to flow outwards, and then heat dissipation of the motor body can be achieved. When external water enters the expansion pipe, the floating ball moves upwards under the action of buoyancy to plug the expansion pipe, and the external water is prevented from entering the outer frame. Heat of the motor body can be dissipated outwards along with movement of the electric bicycle, and long-term use of the motor body is facilitated.

The utility model discloses a kind of composite defoaming devices of reaction kettle, including the circulation pump cooperation with reaction kettle, spray pipe, folding leaf demulsifier and agitator, spray pipe, folding leaf demulsifier and agitator are located in reaction kettle, circulation pump is communicated with spray pipe and the discharge pipe of reaction kettle respectively by pipeline;Agitator is concentric double-shaft agitator, to the outer shaft of concentric double-shaft agitator is equipped with coupling sleeve, and upper layer stirring paddle is equipped on coupling sleeve, to the inner shaft of concentric double-shaft agitator is equipped with lower layer stirring paddle.The utility model is combined by coaxial bidirectional stirring, folding leaf demulsifier and reaction kettle internal circulation spray mode, reach the purpose of eliminating foam in reaction kettle, simultaneously, it is helpful to the dispersion and mixing of material in reaction kettle, improve material reaction efficiency.

This invention discloses an antistatic and flame-retardant functional masterbatch and its preparation method, relating to the field of plastics technology. The antistatic and flame-retardant functional masterbatch prepared by this invention includes a self-made antistatic agent, a composite flame retardant, polypropylene, filler, surface modifier, lubricant, dispersant, antioxidant, and toughening agent. The self-made antistatic agent is prepared by reacting a network-crosslinked isocyanate with double-terminated carboxyl polyethylene glycol, followed by crosslinking with copolymerized polyamic acid. This not only achieves long-lasting antistatic properties but also forms a crosslinked structure in the masterbatch during co-extrusion with the composite flame retardant, synergistically enhancing flame-retardant performance. The composite flame retardant includes benzylamine-modified melamine and sulfonyl diamine-modified melamine, giving the masterbatch excellent flame-retardant properties.

The utility model discloses a side cover subassembly for the both sides of motorcycle seat cushion, including fixed plate, side plate, butt joint plate, clamping groove, butt joint subassembly and diversion subassembly, the fixed plate is connected and locked at the both sides of motorcycle seat cushion, side plate is connected to fixed plate one side, butt joint plate is fixed at side plate one end. The motorcycle side cover has the advantages that the side cover is divided into two sections of independent modules, the fixing plate and the side plate, rapid fixing and separation are achieved through the butt joint assembly, tedious operation of traditional repeated screwing of screws is avoided, when a motorcycle needs to be overhauled, only the side plate provided with the butt joint assembly needs to be disassembled, a maintenance area can be exposed, and the maintenance efficiency is improved. According to the technical scheme, disassembly of unnecessary parts is reduced, the operation time is shortened, in the disassembly and assembly process, the linkage lead screw is in threaded linkage through rotation of the adjusting cylinder, then the abutting plate is driven to deflect through the sliding groove and the protruding block, the rapid locking and unlocking separation effect between the side plate and the fixing plate is achieved, and the device is simple, efficient and practical.

The invention pertains to a brake pad for a bicycle or a motorbike disc brake assembly comprising: a backing plate (1) having a front surface (2) and a rear surface (3), a friction pad (4) disposed on the front surface (2) or the rear surface (3) of the backing plate (1), and a backing plate extension (5) formed in one piece with or adjacently attached to the backing plate (1), wherein at least a part of the backing plate (1) and / or the backing plate extension (5) is coated with a graphene coating (17).

This invention belongs to the field of mineral flotation technology, specifically relating to a forced slurry conditioning-eddy current mineralization-static separation mineral flotation system and method. It includes a slurry conditioning cylinder, a separation chamber, and a mineralization cylinder connected in sequence. The slurry conditioning cylinder contains a slurry conditioning pipeline; the separation chamber contains raw ore processing pipelines and middlings processing pipelines; and the mineralization cylinder contains an eddy current mineralization pipeline. The slurry conditioning pipeline, raw ore processing pipeline, eddy current mineralization pipeline, and middlings processing pipeline are connected sequentially. After minerals and flotation reagents are conditioned in the slurry conditioning cylinder to obtain raw ore slurry, it passes through the separation chamber to obtain middlings ore slurry, which then enters the eddy current mineralization pipeline. The middlings ore slurry returns to the separation chamber and enters the middlings processing pipeline for flotation separation. Finally, concentrate is collected at the top of the separation chamber. The mineral flow path designed in this invention enables efficient collisions between minerals of different particle sizes and slurry conditioning reagents, as well as between minerals and air bubbles, achieving effective flotation recovery.

This utility model discloses a biomimetic noise reduction panel, comprising a sound-absorbing layer with a porous micro-nano structure disposed in the middle, and damping layers disposed on both sides of the sound-absorbing layer. Both damping layers are disposed on a mesh-like support plate. The edges of the support plate are encapsulated by four connecting blocks to form a square plate. The opposing connecting blocks on both sides form a set of connecting units. Two connecting blocks in a connecting unit are spliced ​​together by plug-in components to expand the size of the biomimetic noise reduction panel. The plug-in components are detachable. The sound-absorbing layer contains a porous micro-nano structure, structurally mimicking the scales of a lepidopteran insect wing. In terms of noise reduction performance, this noise reduction panel can stably cover a wide frequency range of 20Hz to 5kHz, with a noise reduction rate between 20.1% and 39.8%. Compared with the average noise reduction rate of 14.6% of traditional materials, its performance is improved by more than 50%, especially achieving a breakthrough in overcoming the industry challenge of low-frequency noise blocking.

The application relates to an anti-impact racket surface coating and a preparation method thereof, and belongs to the technical field of coatings; a multifunctional polyurethane chain extender is designed, rigid benzimidazole structures and flexible sulfide structures in the structure of the polyurethane chain extender help to enhance the tensile strength of the polyurethane, and energy dissipation after impact is accelerated, chain extension and strengthening effects of rigidity and toughness are realized; moreover, the reactivity of alcohol hydroxyl groups and amino structures in the chain extender structure of the application and isocyanate groups is quite different, the reaction of alcohol hydroxyl groups and amino groups will be carried out in steps in the chain extension reaction, the amino groups preferentially react to anchor molecular chains, and the hydroxyl groups are hysteresis reaction, which is beneficial to the formation of ordered hard segment microzones, the microphase separation degree in the system is enhanced, and the impact resistance is significantly improved.

The present application relates to a kind of I type photosensitizer based on squarylium and its preparation method and application, belong to the preparation of chemical material and biomedical nanomaterial technical field.The I type photosensitizer provided by the present application, its molecular structure is with tetraphenyl ethylene substituted indoline derivative as donor, with square acid as acceptor.The rotor structure of tetraphenyl ethylene can effectively avoid the close π-π stacking between molecules.The I type photosensitizer of the present application has the advantages of high molar absorption coefficient, good light stability and low biological toxicity, and also shows the efficient I type active oxygen (·OH) generation capacity and photo-thermal conversion capacity (54.2%), therefore it can be used for photodynamic / photothermal combined antitumor and antibacterial treatment.In photodynamic / photothermal combined treatment, after using laser irradiation, the I type photosensitizer can simultaneously generate a large amount of active oxygen (·OH) and heat, which can efficiently kill tumor cells and bacteria.

This application provides a lens structure for accelerating the dissipation of water mist, including a lens barrel with a lens groove, and a first lens and a second lens sequentially disposed at the front end of the lens groove. By pre-screening a screen-printed ink layer on the second lens and leaving an exhaust gap on the screen-printed ink layer, a first cavity formed between the first lens and the second lens can communicate with the inside of the lens. When mist is generated in the first cavity, the air in the first cavity exchanges with the air inside the lens, which accelerates the dissipation of mist and the air circulation. The temperature difference between the two cavities will decrease rapidly, thereby promoting the dissipation of mist.

This invention relates to the field of rice breeding equipment, specifically to an intelligent rice germination device, comprising a constant temperature chamber, a controller, several placement seats, and several germination trays. The device is characterized by several lifting seats, each corresponding to a placement seat, fixedly connected to the inner wall of the constant temperature chamber. Each lifting seat has a lifting component fixedly connected to its bottom end, and the output end of each lifting component is rotatably connected to a turning component for agitating the rice in the germination trays. The lifting components adjust the distance between the turning components and the bottom wall of the corresponding germination tray. Both the lifting components and the turning components are electrically connected to the controller. This invention allows for flexible adjustment of the working height of the turning components based on the thickness of the seed stack, utilizing the lifting components. Simultaneously, the turning components automatically agitate the rice seeds stacked in the germination trays, breaking up the seed pile, quickly dissipating the accumulated heat in the core, and reducing manual labor intensity.

This utility model relates to the field of electrochemical purification metallurgical technology and discloses a high-purity titanium ground discharge position structure, including a bracket and an acid tank. The bracket has four steel columns at its four corners, and an octagonal channel in the center. The acid tank is placed inside the bracket, directly below the channel. Several guide sliders are centrally symmetrically arranged along the octagonal outline of the channel on the bracket. The steel columns are divided into two symmetrical groups according to their installation positions, with X-shaped tie rods between each group of columns. A working area is provided between the bottom of the bracket and the corresponding steel columns on both sides of the acid tank. In this utility model, the bracket is independent of the electrolytic purification platform and is set on the ground via the steel columns. This reduces the occupancy of the suspended electrolytic purification platform while allowing the bracket to be open around its perimeter. The open perimeter facilitates acid mist dissipation and increases operator safety and ease of operation.

The invention discloses a variable damping hydraulic torsion damper suitable for a hybrid power vehicle, and belongs to the technical field of mechanical vibration control. The shell is connected with a driving side, a spring mounting window and an oil duct are arranged on a driving disc cover, the hub is connected with a driven side, an internal spline is arranged on a central shaft of a driven disc hub, so that the central shaft is connected with a power output shaft, a spring mounting window and a limiting bump are arranged on the central shaft, and a closed annular cavity oil duct is formed between the disc cover and the disc hub. A floating damping ring is arranged between every two adjacent limiting protruding blocks, the cavity is filled with viscous fluid damping media, and a throttling valve of a one-way valve structure is arranged in the annular cavity to control throttling output. Damping springs are installed in windows of the disc cover and the disc hub, and spring guide rods are placed on the two sides of the damping springs to form a damping device. The disc cover and the disc hub are sealed through a framework oil seal. The invention particularly discloses a high-elasticity vibration damper with a spring-mass system and a separately arranged hydraulic vibration damping system.