19results about How to "Stable structure and performance" patented technology

The invention relates to the technical field of wastewater resourceful treatment, in particular to a functional membrane for recycling precious metals in wastewater and a preparation method of the functional membrane. The specific preparation method comprises the following steps: preparing a polyamide spinning solution, carrying out electrostatic spinning on the spinning solution to form a polyamide fiber net, stably combining hollow mesoporous nano silicon dioxide on the fiber net through carboxymethyl chitosan, and grafting an epoxy silane coupling agent on the surface of the hollow mesoporous nano silicon dioxide to obtain the hollow mesoporous nano silicon dioxide fiber net. Finally, adipic dihydrazide is grafted on the hollow mesoporous nano silicon dioxide through a ring-opening reaction. Organic polyamide is used as a film forming substance, the raw material cost is low, the method is suitable for large-scale industrial production, the recovery rate of precious metal ions is high, and the film body has good mechanical strength and can stably operate for a long time.

The invention discloses a preparation method of an environment-friendly degradable rubber material, and relates to the technical field of rubber material preparation. The environment-friendly degradable rubber material disclosed by the invention is prepared by the following steps: plastifying natural rubber at high temperature, then adding reinforcing filler, palm oil paste, an anti-aging agent and an active agent for first-stage plastifying, and then adding part of rubber softening oil, zinc oxide, a foaming agent, a vulcanizing agent and a xanthate accelerant containing benzothiazole for second-stage rubber mixing; and adding the rest rubber softening oil to carry out third-stage rubber mixing to obtain a rubber material, and finally carrying out thin passing, packaging, standing and two-time vulcanization on the slurry to obtain the rubber material. The environment-friendly degradable rubber material provided by the invention is simple in preparation method, stable in processability, excellent in mechanical strength and rebound resilience, excellent in wear resistance, insulativity, acid and alkali resistance, aging resistance, high and low temperature resistance and waterproofness, and can be applied to the fields of diving suits, tires, wires and cables and the like.

The invention belongs to the technical field of low-melting-point alloys, and provides a low-melting-point gallium-based liquid alloy and a preparation method and application thereof. The preparation raw materials of the gallium-based liquid alloy comprise gallium, indium, tin, zinc, bismuth, antimony, lead and rare earth metal with specific mass content. The rare earth metal comprises one or two of lanthanum, cerium and neodymium. A trace amount of one or two of lanthanum, cerium and neodymium is added into the gallium-based alloy, so that the purity of the alloy can be improved, the viscosity can be reduced, and the surface tension can be adjusted; by adjusting the formula of the alloy, the smelting time is shortened in the alloy smelting process stage, the efficiency is improved, the alloy cost is reduced, the alloy is more uniform macroscopically, the low-temperature stability of the alloy is further improved, and the alloy can be kept in a stable liquid state at the low temperature even 10 DEG C below zero and better meet the special climate requirements.

The invention discloses a SiO2-coated ZnO white dustproof coating prepared based on a step-by-step sol-gel method and a preparation method of the SiO2-coated ZnO white dustproof coating, and belongs to the field of spatial special functional materials. According to the invention, stable performance of the thermal control coating under lunar dust pollution is realized. The preparation method comprises the following steps: introducing SiO2 particles on the surface of zinc oxide through a sol-gel method to construct a micro-level rough surface structure, adding a low-surface-energy modifier into a mixed solution of zinc oxide and silica sol, uniformly mixing, and drying to obtain multi-scale hydrophobic SiO2 (at) ZnO particles. The preparation method comprises the following steps: putting a SiO2 coated ZnO powder material into silica sol prepared in advance, adding a surfactant, uniformly mixing to prepare white slurry, finally covering the slurry on an alloy substrate through a blade coating technology, and curing to form the SiO2 coated ZnO white dustproof coating. The method is applied to the field of deep space exploration and has a very wide application prospect.

The utility model discloses a temperature-controllable wet brake forced cooling system, which relates to the technical field of wet brakes and comprises a forced cooling oil tank, a front axle synchronous diverter valve and a rear axle synchronous diverter valve. A system safety overflow valve is installed at the output end of the forced cooling system gear pump, a radiator assembly is arranged at the output end of the system safety overflow valve, a rear brake is installed at the output end of the radiator assembly, and the front and rear axle synchronous diverter valve is arranged at one end of the rear brake. According to the temperature-controllable wet brake forced cooling system, oil in the forced cooling oil tank can be shunted to enter the interiors of the oil backward brake and the front axle brake through the design of the front and rear axle synchronous diverter valve, so that a friction plate I and a friction plate II are prevented from being burnt out due to friction heating; therefore, the braking efficiency of the rear brake and the front axle brake is ensured, and the safety of the vehicle in use is further ensured.

The invention relates to the technical field of battery materials, and discloses an iridium and praseodymium doped ternary precursor, a positive electrode material, a preparation method of the positive electrode material, a positive electrode and a battery. The iridium and praseodymium doped ternary precursor comprises an inner core and a coating layer, the inner core is formed by nickel-cobalt-manganese hydroxide doped with iridium, and the coating layer is formed by nickel-cobalt-manganese hydroxide doped with praseodymium; the chemical formula of the iridium and praseodymium doped ternary precursor is NixCoyMn1-x-y (OH) 2 [Ir] m [Pr] n, wherein x is greater than or equal to 0.34 and less than or equal to 0.9, y is greater than or equal to 0.05 and less than or equal to 0.33, and 1-x-y is greater than or equal to 0.05 and less than or equal to 0.33. The preparation method comprises the following steps: coprecipitating nickel ions, cobalt ions, manganese ions and iridium ions to obtain an inner core; and then nickel ions, cobalt ions, manganese ions and praseodymium ions are co-precipitated on the surface of the inner core to form a coating layer. The precursor provided by the invention has relatively good electrochemical performance.

This application relates to the field of material sealing technology, and particularly to a high-performance insulating ceramic sealing method for neutron tubes. The method includes: sequentially performing organic solvent ultrasonic cleaning and argon plasma etching activation treatment on the sealing surface of a cylindrical high-purity alumina ceramic part, followed by magnetron sputtering deposition of a titanium transition layer to obtain a ceramic part with a titanium transition layer; acid washing to remove the oxide layer from the sealing surface of a Kovar alloy cylindrical flange, followed by cleaning and drying to obtain a metal sealing part; preparing an active brazing filler metal sheet; sequentially assembling the sheet to form a pre-assembled assembly; placing the pre-assembled assembly in a vacuum brazing furnace, applying axial preload to complete the sealing, followed by controlled cooling to form a sealing part with an airtight brazed joint; and annealing to obtain the finished sealing assembly. This method solves the problems of low dielectric strength, large differences in thermal expansion coefficients, and difficulty in controlling interface quality in existing technologies.

The present invention discloses an integrated prefabricated component for the leading edge of a wind turbine blade and a preparation method thereof, wherein the integrated prefabricated component for the leading edge of the blade comprises an integrated prefabricated pressure surface front edge UD main body section, a leading edge connecting plate main body section and a flanged flange section, wherein the flanged flange effectively prevents the leading edge prefabricated component from sliding downward due to gravity, thereby ensuring the structural accuracy of the blade production. Furthermore, the use of the integrated prefabricated component for the leading edge of the blade reduces the number of times of glue spraying during the production process of the wind turbine blade, thereby ensuring the stability of the structural performance of the leading edge of the wind turbine blade; the integrated prefabricated component for the leading edge of the blade can also reduce the step wrinkles at the splicing position of the leading edge connecting plate mold, thereby ensuring the gap between the leading edge connecting plate and the suction surface shell; in addition, during the production process of the wind turbine blade, the integrated prefabricated component for the leading edge of the blade can also reduce the number of layers of fiber cloth laid by workers, thereby improving the efficiency of shell laying and shortening the production cycle of the blade.

The utility model relates to an RJ45 socket connector, which is provided with an insulating main body, a first terminal module and a second terminal module, the first terminal module is assembled on the insulating main body and is provided with a contact part and a first splicing part, and the contact part is in an inclined posture in a plugging cavity of the insulating main body; and the second terminal module is assembled on the insulating main body and provides a welding part and a second splicing part, the welding part extends out of the insulating main body, and the second splicing part is in contact conduction with the first splicing part, so that the first terminal module and the second terminal module are electrically connected together. The terminals are sectionally modularized, assembled on the insulating main body and then connected together in a conducting manner, so that the automatic production is facilitated, the assembling structure and quality are ensured, the disassembly, assembly and maintenance are facilitated, the forming size and the structure of the terminals are stable, the second terminal module can be selectively assembled, the production requirements of an SMT (Surface Mount Technology) or a DIP (Double In-line Package) process are met, and the production efficiency is improved. The connector has interchangeability and standardization, manufacturing and implementation of the connector are greatly improved, and stock overstock of accessory production is reduced.

The invention relates to an intelligent temperature-adjusting, antibacterial and deodorant multifunctional graphene-based PCM microcapsule fabric as well as a processing method and application thereof. A microcapsule and regenerated keratin powder are embedded in a pretreated wool fabric by polyurethane, wherein the microcapsule takes a phase change material (PCM) and graphene as core materials and takes epoxy resin as a shell material. Belongs to the technical field of functional textile processing methods. According to the invention, the polyurethane embedded graphene-based PCM microcapsule, regenerated keratin powder and anti-mite finishing agent coated fabric is adopted, so that the properties of intelligent temperature regulation, antibiosis, deodorization and the like are realized, the temperature and humidity of the fabric can be intelligently regulated according to the change of the surrounding environment, the comfort requirement of a human body is met, and the fabric can be applied to the fields of bedding articles, automobile linings, medical bandages and the like.

The present invention discloses an organic white coating material with ultraviolet radiation resistance and low solar spectrum absorption rate and a preparation method thereof, which belongs to the field of spacecraft thermal control materials. The present invention aims to solve the problem of poor performance stability of existing thermal control coatings under ultraviolet radiation. The method of the present invention is to use ALD technology to modify the surface of ZnO powder to prepare Y2O3@ZnO, CeO2@ZnO, La2O3@ZnO powder materials, and then mix the rare earth oxide modified powder material (Y2O3@ZnO, CeO2@ZnO or La2O3@ZnO powder material) with an organic binder to form a white slurry, and finally spray the white slurry on an alloy substrate by spraying technology, and after drying, the white coating is obtained. The white coating of the present invention has a low solar absorption ratio and a high emissivity, and has stable structural performance and excellent mechanical properties under extreme conditions (pressure, temperature, and radiation). It is suitable for the actual mission environment of spacecraft and can be used in deep space exploration and other fields.

The present application provides a method for manufacturing a bendable paper hookah pipe and a device thereof. The device of the present application is equipped with a roller and a central support shaft. The roller includes at least one rolling wheel. The outer surface of the rolling wheel has a plurality of protruding annular embossings. The central support shaft has a plurality of annular convex grooves that can match the annular embossings. The central support shaft penetrates into the center of a paper spiral tube located at an operating position so that the tube wall of the paper spiral tube is between the central support shaft and the rolling wheel. The roller and the central support shaft can be moved to one or more predetermined positions along a direction parallel to the axis of the paper spiral tube. The rolling wheel and the central support shaft are used to roll the tube wall of a paper spiral tube to form a accordion tube structure by cooperative operation. Then, the paper spiral tube that has been rolled into the accordion tube structure is extruded in the axial direction thereof to form a bendable paper hookah pipe.

The invention discloses a high-permeability flexible gas sealing material and a preparation method thereof, and belongs to the technical field of sealing material preparation. The high-permeability flexible gas sealing material is composed of the following components in parts by weight: 20-30 parts of lime, 10-12 parts of magnesium oxide, 18-22 parts of polyester compounds, 20-28 parts of composite resins, 2-5 parts of stabilizers, and 1-4 parts of silane coupling agents, wherein the polyester compound is prepared from 2-methyl-2-propyl-1,3-propylene glycol, 2,4-dihydroxy-3,3-dimethylbutyric acid and acrylic acid, and the composite resin is prepared from 1,1,1-tri-p-hydroxyphenylethane, 5-norbornene-2-methylamine and 2,3-dihydrofuran. The gas sealing material prepared by the method has excellent stability, corrosion resistance and flexibility.

The invention belongs to the field of asphalt pavements, and particularly relates to a noise reduction asphalt pavement structure which comprises a semi-open graded modified asphalt mixture upper surface layer with the void ratio of 7%-10%. And SMA-10 is arranged on the upper layer of the semi-open graded modified asphalt mixture. In the pavement structure provided by the invention, the upper surface layer is the SMA-10 semi-open graded modified asphalt mixture with the porosity of 7-10%, certain open pores are reserved on the surface of the surface layer, and most closed pores are formed in the surface layer. Compared with a porous asphalt pavement with the void ratio of about 20%, dust and other impurities of a surface layer adopting 7-10% of the semi-open graded modified asphalt mixture are not prone to entering the asphalt mixture, pores of the asphalt mixture are not prone to being blocked, the noise reduction effect is lasting compared with a conventional porous asphalt pavement structure, and the structural performance is stable.

The application discloses the technical field of flexible electronic functional materials, and discloses a photocurable ionic hydrogel and a preparation method and application thereof. The photocurable ionic hydrogel is composed of the following components in parts by mass: 15-25 parts of a polymer monomer, 0.05-0.5 parts of a chemical crosslinking agent, 0.1-0.5 parts of a photoinitiator, 40-60 parts of a water / glycerol binary solvent, 10-30 parts of an ionic conductive component, 2.5-10 parts of inorganic nano-filler and 1-5 parts of an organic macrocyclic molecule. The photocurable ionic hydrogel, the preparation method and the application thereof can effectively solve the technical bottleneck that the traditional ionic gel is difficult to consider the conductivity, the mechanical property, the curing efficiency and the stability.

The application discloses a kind of composite PP-R pipe materials and preparation method and application thereof, it is related to PP-R pipe material technical field, the composite PP-R pipe material, including by inside to outside sequentially connected PP-R inner layer, impact resistance oxygen barrier layer and PP-R outer layer, the impact resistance oxygen barrier layer includes parylene, polyglycolic acid, compatibilizer.The composite PP-R pipe material adds impact resistance oxygen barrier layer as middle layer in it, the material of the impact resistance oxygen barrier layer uses the cooperation of parylene and polyglycolic acid (PGA), with excellent mechanical properties and gas barrier property, and can keep structural performance stable under low temperature environment below-10 DEG C, can be applied in PP-R pipe material system to improve its low temperature brittleness, improve low temperature impact resistance.

The invention relates to the technical field of aircraft cushion pads, and discloses a foamed rubber low-altitude aircraft cushion pad which comprises a cushion pad body. The cushion pad body is designed to be of a gradient density structure, the cushion pad body comprises functional layers which are compounded into a whole from top to bottom in a co-vulcanization mode, and the functional layers comprise an impact layer which is a high-density foaming rubber layer; the transition layer is a medium-high density foamed rubber layer; the buffer layer is a low-density high-resilience foaming rubber layer; through the synergistic effect of the gradient density structure and the macroscopic cavity, efficient absorption and step-by-step dissipation of impact energy are achieved, and the low-density high-resilience layer ensures excellent permanent deformation resistance. A co-vulcanization process and a specific material system endow the product with an integrated stable structure and fatigue resistance, the defects that a traditional cushion pad is prone to collapse, aging and cracking are fundamentally overcome, the reliability of the buffering performance is remarkably improved, and the service life of the buffering performance is remarkably prolonged.

The utility model relates to communication vibrator equipment technical field especially a kind of mesh octogram ultra-wideband vibrator, it includes support, set up the radiation metal plate and feed piece of octogram structure.The radiation metal plate includes four radiation sheets.The area enclosed by four radiation sheets is coaxially arranged with support.The vertex of two adjacent radiation sheets is provided with concave point, and the vertex of other two adjacent radiation sheets is provided with protruding convex point, and feed piece is coupled and connected in two concave points, two convex points.Feed piece is electrically connected by feed hole, cable core hole and cable core, feed column on it.Radiation metal plate on support is set into diamond type plane structure, so that vibrator can work in the frequency range of 680-960MHz VSWR≤1.4, can realize the antenna of more uniform beam width within horizontal plane 3dB width, can realize wideband and ultra-wideband in low frequency band, and compatibility is stronger.