68results about How to "Does not affect basic performance" patented technology

The invention provides a preparation method of colorful polyurethane emulsion, comprising the following steps of: (1) reacting isocyanate, polyether polyol and polyester polyol to obtain a prepolymer; (2) carrying out chain extension reaction on the prepolymer prepared by the step (1), a colorful micromolecule chain extender, a common micromolecule chain extender and a hydrophilic chain extender; and (3) neutralizing by a salt-forming agent, emulsifying in a dispersing way by adding water, and removing an organic solvent by means of reduced pressure distillation to obtain the colorful hydrophilic polyurethane emulsion. According to the preparation method, the colorful micromolecule chain extender participates in the chain extension reaction, so that the prepared colorful polyurethane emulsion is better in whole performance, wide and adjustable in solid content distribution, and less in residuals of harmful substances in the colorful polyurethane emulsion. The red, yellow and blue three-color polyurethane emulsion can be synthesized by the micromolecule chain extenders with different colors, and the required polyurethane emulsion with the other colors can be obtained due to simple blending.

The invention discloses a radiating structure for a display module of a refrigerator, wherein a hollow cavity is arranged at the periphery of the display module, the hollow cavity is provided with at least two outlets to be communicated with the outside, and the hollow cavity and the two outlets of the hollow cavity locate the display module in a space capable of forming air circulation with the outside. The radiating structure can reduce a series of problems caused by overheat or heat concentration of the display module.

The invention discloses a preparation method of a porous stainless steel film. The preparation method comprises the following steps: firstly, carrying out compression molding on large-grain-size stainless steel powder coated with a low-melting-point metal layer on the surface through a powder compressing machine; secondly, preparing a stainless steel powder film layer on a molded blank body; and finally, sintering to obtain the highly-asymmetrical porous stainless steel film. According to the preparation method provided by the invention, the stainless steel powder surface of the base body for preparation is coated with the low-melting-point metal layer so as to reduce the sintering temperature of stainless steel powder of the base body. Therefore, the base body and the film layer are sintered together; the asymmetrical degree of the prepared porous stainless steel film material is high; the pore diameter distribution of the film layer is narrow; the film layer and the base body are firmly combined; the low-melting-point metal on the surface of the base body powder and the base body powder are alloyed by high temperature sintering; meanwhile, the mechanical intensity of the film material is ensured, and the other metal properties of the porous stainless steel film are improved.

The invention relates to a low-cogging-torque motor stator. The low-cogging-torque motor stator comprises a stator iron core and stator coils, wherein a plurality of stator teeth are distributed at intervals and extended integrally from the inner circumference of the stator iron core; pole shoes are arranged at the tail ends of the stator teeth; a stator groove is formed between the adjacent stator teeth; the stator coils are placed in the stator grooves; one or more than one steps are arranged on two sides of each pole shoe; and the steps are correspondingly matched with the steps on the adjacent pole shoe to form a bend notch. The invention also relates to an assembling method for the low-cogging-torque motor stator. The assembling method comprises the following steps of: laminating stator punching sheets with different pole shoe widths into the stator iron core; correspondingly matching the steps with the steps on the adjacent pole shoe to form the bend notch; and placing the stator coils in the stator grooves so as to finish assembly of the stator. The invention meets the basic performance of a motor and greatly reduces cogging torque.

The invention provides a method for connecting AlN (aluminum nitride) ceramics and a SiC/Al composite material respectively plated with a thin-film metal layer on the surface, which belongs to the field of electrical packaging materials and technology. The method is characterized in that the surfaces of the adopted AlN ceramics and SiC/Al composite material are respectively plated with a thin-film metal layer, and the metal layer is made of nickel with a thickness of 1 to 10 mu m; and the adopted solder is a 40Al-40.7Ag-19.3Cu eutectic solder which is required to be used with fluoride soldering flux; the method comprises the following steps: firstly, cleaning the AlN ceramics, the SiC/Al composite material and the solder by using a physical or chemical method; putting the solder between the welding surfaces of the AlN ceramic and the SiC/Al composite material, then adding appropriate fluoride soldering flux; and finally, carrying out heat preservation on the obtained product for 3 to 30 minutes in a protective atmosphere at the temperature of 560 to 600 DEG C. The method provided by the invention has the advantages: at the brazing temperature, the basic properties of base metals are not affected; the solder does not intrude into the base metals so as to affect the properties of the base metals and welded joints; and the welded joints are good in property, the shearing strength of the welded joint reach 110MPa, and the air tightness of the welded joint is 1.0*10-11 Pa m<3>/s.

The invention provides a self-lubricating silicone rubber which is characterized by being prepared from all the following ingredients in parts by weight: 100 parts of methyl vinyl silicone rubber, 20to 50 parts of fumed silica, 1 to 5 parts of hydroxyl silicone oil, 0.1 to 1 part of fluorine mold release agent, 10 to 20 parts of methyl phenyl silicone oil and 2 to 10 parts of magnesium oxide. According to the self-lubricating silicone rubber and a preparation method thereof, raw rubber matching is improved to improve physical performance of the silicone rubber, non-reactive silicone oil is added to reduce surface friction after silica gel vulcanization, the defined amount of MgO is added to improve reverse resistance of silica gel products, and the special fluorine mold release agent ingredient is added to improve demoulding performance and roller banding performance; thus, basic performance of the silicone rubber is not affected, surface friction of the silica gel is reduced, productabrasion is reduced, a dynamic sealing effect of the silica gel is achieved, and service life of products is prolonged.

The invention discloses a vertical cavity surface laser emitter which comprises an active layer, a function assisting layer and a P-type DBR (Distributed Bragg Reflector) layer which are arranged in an overlapped manner, wherein the function assisting layer and the P-type DBR layer form a table surface structure; channels are formed inside the P-type DBR layer; the table surface structure is divided into a plurality of secondary table surface structures by the channels; P-surface electrodes in one-to-one correspondence to the secondary table surface structures are arranged at upper ends of the secondary table surface structures. Therefore, multiple waveguides can be formed by using the channels, carrier distribution and the waveguides can be associated, and furthermore the purposes that single mode output is independently controlled by a single electrode and a small deal of mode output is under hybrid control of multiple electrodes can be achieved. The invention further discloses a manufacturing method of the vertical cavity surface laser emitter. The table surface structure can be directly etched to form the channels, so that a novel mode control way can be achieved; in addition, as all modes are output on one same table surface, the modes can be directly coupled with optical fibers, and a multiplexer is not needed.

The invention discloses an anti-wear anti-seize lubricant for a drilling fluid, and belongs to the field of well drilling. The anti-wear anti-seize lubricant comprises the components: epoxidized (and/or sulfonated) modified vegetable oil, at least two organic boric acid esters with different carbon chains, triethylamine, samarium dialkylphosphorodithiloate, (+)-2,2'-methylenebis[(3aR,8aS)-3a,8a-dihydro-8H-indeno[1,2-d]oxazole, and an emulsifier, wherein the mass ratio of the organic boric acid esters to triethylamine to samarium dialkylphosphorodithiloate is 5 to 5 to 2, the total amount of the three components accounts for 20%-36% of the total mass of the product, and the amount of the emulsifier accounts for 5% of the total mass of the product. The anti-wear anti-seize lubricant for the drilling fluid has stronger anti-wear, anti-friction and high-temperature-resistant performance.

The invention discloses a polylactic acid composite material and a preparation method thereof. The polylactic acid composite material comprises the following active ingredients respectively in parts by weight: 80-120 parts of polylactic acid, 100-200 parts of inorganic fillers, 15-35 parts of ester copolymer, 0.5-10 parts of polyfunctional group coupling agent, and 0.02-2 parts of radical initiator. According to the preparation method provided by the invention, the filling capacity and dispersity of the inorganic fillers, as well as the interface binding force between the inorganic fillers and the polymer, in the polylactic acid composite material can be remarkably improved. The composite material has the advantages of being excellent in properties, low in cost, biodegradable and the like, and the preparation method is simple, and easy for realization of industrial production.

The invention provides a safety over-charge prevention cover board for a ternary lithium battery, which comprises a cover board main body, a bottom insulation board, and a positive terminal and a negative terminal which are respectively and fixedly arranged at the upper end face of the cover board main body. The positive terminal is conducted with the cover board main body; an insulating mat is arranged between the negative terminal and the cover board main body; the bottom end face of the negative terminal is connected with a temperature sensor for sensing an internal temperature of the lithium battery; a liquid conducting medium is arranged at the bottom of the temperature sensor; and when the internal temperature of the battery is excessively high, the liquid conducting medium is expanded to ascend to the top end of the battery, so that the negative terminal is conducted with the cover board main body to form an external short circuit. When an over-charge temperature of the battery is risen, the liquid conducting medium is expanded to change the temperature sensor into a conductor, so that the negative terminal is conducted with the cover board to form the external short circuit, thereby preventing thermal runaway in the over-charge process and ensuring over-charge safety of the battery.

The invention discloses thermoplastic vulcanized rubber based on polylactic acid, and a preparation method thereof. The rubber comprises the raw materials of, by weight, 50-90 parts of ethylene-vinyl acetate rubber, 10-50 parts of polylactic acid, 0.1-3 parts of peroxide, 0.1-5 parts of a free radical stabilizing agent, 0.05-1 part of an antioxidant, 0.1-3 parts of an anti-aging agent, and 1-20 parts of a plasticizer. With the preparation method provided by the invention, the obtained thermoplastic vulcanized rubber has the characteristics of high biomass content, high strength, high elongation rate, good resilience, partial biodegradability, excellent thermoplasticity, and the like. The preparation method is simple, and industrialization can be easily realized.

The invention discloses a preparation method of an environment-friendly cigarette adhesive. The preparation method comprises the following steps: mixing water, a pH buffer agent, polyvinyl alcohol and an emulsifying agent, heating the mixture to 88-92 DEG C until polyvinyl alcohol is completely dissolved, and cooling to 58-62 DEG C; adding one tenth of vinyl monomer mixture and one half of a plasticizer, mixing, heating the mixture to 73-77 DEG C, adding an initiator equal to one third of the initiator after 0.5-1.0 hour, and preserving the temperature for reaction; dropwise adding the remnant vinyl monomer mixture within 4-6 hours after an emulsion emits blue ray, replenishing one third of the initiator when one half of the vinyl monomer mixture is dropwise added, adding the remnant initiator after the vinyl monomer mixture is dropwise added, heating to 88-92 DEG C, and further reacting for 30-60 minutes; continuously stirring to naturally cool to 60-70 DEG C, adding the remnant plasticizer, uniformly mixing, and carrying out vacuumizing for 10-20 minutes; cooling to the room temperature, so as to obtain a component I; mixing the component I with ethylene-vinyl acetate polymers, so as to obtain the environment-friendly cigarette adhesive.

An embodiment of the invention discloses a preparation method of a lithium battery diaphragm. The method comprises the steps of adding 10-15 parts by mass of poly(vinylidene fluoride-chlorotrifluoroethylene) and 2-7 parts by mass of lactic acid into 50-80 parts by mass of an organic solvent, and carrying out stirring and dissolving; adding 0.5-5 parts by mass of an initiator and 2-10 parts of a hydrogenation reducing agent, and then carrying out stirring and reacting; adding a reaction mixture into an alkaline aqueous solution, carrying out stirring and precipitating, and carrying out filtering, washing and drying precipitates to obtain poly(vinylidene fluoride-chlorotrifluoroethylene-lactic acid) copolymer resin; and preparing the lithium battery diaphragm from the poly(vinylidene fluoride-chlorotrifluoroethylene-lactic acid) copolymer resin. The lithium battery diaphragm is prepared from the poly(vinylidene fluoride-chlorotrifluoroethylene-lactic acid) copolymer resin, so that the lithium battery diaphragm has the characteristics of being degradable, resistant to electrolyte corrosion and high in tensile strength.

The invention provides a hydrogel microsphere containing ellagic acid and a preparation method thereof. The hydrogel microsphere containing the ellagic acid is characterized by comprising a core material and a wall material, wherein the wall material wraps the core material; the core material contains ellagic acid, a humectant, an antioxidant and a preservative; and the wall material is hydrogel formed by crosslinking sodium alginate and calcium chloride. The hydrogel microsphere containing the ellagic acid obtained by the invention is applied on the face to reduce melanin deposition in a large area, and has the effects of whitening and moisturizing skins.

The invention discloses a cellulose diacetate composite material with a semi-interpenetrating network structure and a preparation method thereof.The preparation method is characterized in that after cellulose diacetate and epoxy resin are mixed, epoxy resin dispersed in the mixture is cured, and the semi-interpenetrating network structure is formed; the composite material is prepared from, by mass, 100 parts of cellulose diacetate, 5-50 parts of epoxy resin, 5-20 parts of camphor, 100 parts of acetone and 2-20 parts of a curing agent.The tensile strength and breaking elongation of the cellulose diacetate composite material are remarkably improved.Use of plasticizer is avoided, harm of the plasticizer to human bodies and the environment is greatly reduced, high temperature during melting is also avoided, and energy consumption is reduced.The preparation method is simple, industrialization is easy, and the preparation method can be widely used in glass frames, toys for children, table tennis balls, thin films, 3D printing consumables, automobiles, household appliance consumables and other plastic products for daily use.

The invention belongs to the technical field of silica gel, and more specifically relates to a self-lubricating silicone rubber, and a preparation method thereof. The self-lubricating silicone rubbercomprises following components, by weight, 100 parts of methyl vinyl silicone rubber, 10 to 30 parts of fumed silica, 1 to 5 parts of vinyl hydroxy silicone oil, 0.10 to 0.15 part of zinc stearate, 10to 30 parts of diphenyl silicone oil, and 2 to 10 parts of calcium oxide. According to the preparation method, rubber physical performance is improved through improvement of rubber ratio; non-reactive silicone oil is added to reduce silica gel surface frictional force after sulfuration; an appropriate amount of calcium oxide is added to improve the stability of silica gel products; special zinc stearate component is added to improve moulding demoulding performance and roller adhesion performance, so that silica gel surface friction force is reduced without influencing silica gel basic performance, product wearing is reduced, silica gel dynamic sealing effect is achieved, and product service life is prolonged.

The invention belongs to the technical field of corrosion prevention of ocean self-repairing coatings and particularly relates to an ocean pressure alternating sensitive supramolecular microsphere anda synthesis method of the microsphere. The ocean pressure alternating sensitive supramolecular microsphere is prepared by wrapping a supramolecular nano mesoporous silicon dioxide sphere with a corrosion inhibitor and grafting and modifying the surface with cyclodextrin. The synthesized nano supramolecular microsphere has characteristics of a nanomaterial, is used as functional filling to prepareanti-corrosive paint, does not influence basic performance of the paint, and has an important application value. The pressure sensitive supramolecular microsphere has the characteristics of good stability, pressure sensitivity characteristic, good fusion with the paint and the like. The microsphere is environment-friendly and pollution-free in a use process. The microsphere is applicable to anti-corrosive coating filling of engineering and equipment such as ocean engineering, ships, deep-ocean engineering and underwater vehicles. The microsphere has the advantages of environmental friendliness, good controllability and easiness in operation and is easy in industrial production.