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100results about How to "Improves strength and hardness" patented technology

Polyurethane composite material having shape memory function sponge, and preparation and using method thereof

The invention belongs to the technical field of polyurethane, and relates to a polyurethane composite material having a shape memory function sponge, and a preparation and using method thereof. The composite material comprises a component A, a component B and a component C, wherein the component A comprises polyether polyol and polymer polyol, a foam stabilizer and a foaming agent, and the component B comprises polyether polyol, isocyanate, a hardening agent and a polyether opening agent. The shape memory sponge can generate memory deformation along with temperature sensing and pressure, and has the advantages of moderate rebound speed, no obstructing and shrinkage, large physical mechanical strength, certain support strength and the like. By a mouse pad manufactured by the polyurethane composite material having the shape memory sponge, on one hand, the hardness and strength of the traditional memory sponge is improved, and the mouse pad has a certain support function for wrists; and on the other hand, the memory sponge has a temperature sensing effect and a shape memory function, so that the memory sponge can generate zero-pressure support for each part of the wrist, promote blood circulation for each part of the wrist, and relieve fatigue.
Owner:SHANDONG INOV POLYURETHANE

Organic and inorganic hybridization nanometer super-hydrophobic fiber membrane and preparing method thereof

The invention relates to an organic and inorganic hybridization nanometer super-hydrophobic fiber membrane and a preparing method thereof. The super-hydrophobic fiber membrane is a polystyrene/polyacrylonitrile nanometer fiber membrane comprising silicon dioxide particles modified by epoxy modified polysiloxane. The preparing method comprises the steps that under the indoor temperature conditions, the polystyrene (PS) is added into solvent to be stirred and dissolved, the silicon dioxide composite nanometer particles modified by epoxy modified polysiloxane are added into the mixture to be stirred to obtain a PS spinning solution; under the indoor temperature conditions, the polyacrylonitrile (PAN) is dissolved in the solvent to be stirred and dissolved, and the silicon dioxide composite nanometer particles modified by epoxy modified polysiloxane are added into the mixture to be stirred to obtain a PAN spinning solution; double-sprayer electrostatic spinning and drying are carried out, and then the organic and inorganic hybridization nanometer super-hydrophobic fiber membrane is obtained. According to the organic and inorganic hybridization nanometer super-hydrophobic fiber membrane and the preparing method, the strength of the hydrophobic fiber can be improved to a certain degree, the hydrophobic performance can be superior without modifying the surface through fluorochemicals and other low surface potential energy substances, and the problems that an existing super-hydrophobic fiber is complex in preparing process and low in strength are solved.
Owner:DONGHUA UNIV

High-toughness 3D printing paraffin forming material and preparation method thereof

The invention discloses a high-toughness 3D printing paraffin forming material. The high-toughness 3D printing paraffin forming material is prepared from components of raw materials in percentage by mass as follows: 30%-50% of paraffin, 2%-5% of bee wax, 5%-10% of epoxy resin, 2%-3% of a curing agent, 2%-20% of a viscosity modifier, 20%-30% of a toughening polymer, 6%-25% of a high-hardness polymer, 2%-4% of a filling material, 0.1%-0.3% of dyes and 2%-4% of a phase transferring agent. The bee wax is added to physically modify a paraffin support material, and the impact toughness of the paraffin support material is effectively improved; meanwhile, epoxy resin and the corresponding curing agent are added, and the adding quantity of the epoxy resin and the adding quantity of the corresponding curing agent are adjusted, so that the bonding strength of the paraffin support material and a 3D printing product interface is moderate while the hardness and the strength of the paraffin support material are improved and the shrinkage is reduced, and the paraffin support material is easy to peel off, doesn't deform and doesn't affect the support function on the 3D printing product in the printing process when removed in the later period. The toughening polymer and the high-hardness polymer are added to the paraffin support material, the needle penetration of the material can be effectively reduced, the toughness of the material is improved, and the high-toughness 3D printing paraffin forming material has excellent overall properties.
Owner:佛山市晗宇科技有限公司

Artificial hip joint with nano and porous structure on surface and preparation method thereof

InactiveCN101496749AImproves strength and hardnessReduce stress shieldingJoint implantsFemoral headsCotyloid CavityHuman organism
The invention relates to an artificial hip joint with surface nanometer and porous structure in the technical field of medical appliance and a preparation method thereof. In the artificial hip joint, the part of a femoral head handle or/and acetabulum combined with human organism has a scale of surface layer grains of between 1 and 500nm, and has an evenly distributed porous structure; and the artificial hip joint has a gradient nanometer structure from the surface inwards, the scale of the grains gradually increase along with increase of distance with the surface, until a scale of a conventional untreated state is achieved, and the thickness of the gradient nanometer layer is between 1 and 500 mu m. The preparation method comprises the following steps that: the artificial hip joint obtains the nanometer gradient structure layer by surface high-energy treatment technology; and then, the nanometer gradient structure layer is subjected to acid treatment so as to obtain a porous structure on the surface, thereby obtaining the artificial hip joint. The artificial hip joint and the method not only can effectively reduce stress shield effect of an implant body and a bone, but also can improve interface combination of the prosthesis and the bone, effectively improve the loosened implanted prosthesis, and have excellent application in the field of biomedicine.
Owner:SHANGHAI JIAO TONG UNIV

Multielement-enhanced heat-resistant corrosion-resistant magnesium alloy and manufacturing method thereof

ActiveCN107083508AImprove room temperature and high temperature mechanical propertiesImproves strength and hardnessRare-earth elementCorrosion resistant
The invention discloses a multielement-enhanced heat-resistant corrosion-resistant magnesium alloy and a manufacturing method of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy. The ingredients of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy comprise pure magnesium ingots, pure zinc ingots, Mg-Gd alloy, Mg-Y alloy, Mg-Nd alloy, Mg-Ca alloy, Mg-Zr alloy and nanometer-scale NdN particles. The elements in the raw materials comprise, by mass, 3.5-5.0% of Gd, 1.0%-3.0% of Y, 0.5%-0.8% of Nd, 0.8%-1.5% of Zn, 0.3%-0.8% of Ca, 0.3%-0.6% of Zr, 0.5%-1.5% of nanometer-scale NdN particles and the balance Mg. The sequence of the mass percentage contents of the three rare earth elements of the Gd, the Y and the Nd from large to small is Gd>Y>Nd, and the mass percentage of the total addition amount of the three rare earth elements of the Gd, the Y and the Nd does not exceed 10%. The particle size of the nanometer-scale NdN particles is 80-150 nm. The steps of pretreatment and cladding of the NdN particles, preheating of the ingredients, smelting, refining, doping, pouring, sectioned solution treatment and artificial aging treatment are sequentially conducted, and then the fine, dispersive nanometer-precipitated-phase microscopic-structure heat-resistant corrosion-resistant magnesium alloy product is obtained. By the adoption of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy and the manufacturing method of the multielement-enhanced heat-resistant corrosion-resistant magnesium alloy, the manufacturing cost is low, and the heat resistance and corrosion resistance of the magnesium alloy are excellent.
Owner:YANGZHOU FENG MING METAL PROD +1

Smelting preparation method for anti-yielding aluminum alloy section bar

The invention discloses a smelting preparation method for anti-yielding aluminum alloy section bar. The smelting preparation method comprises the following operation steps: preparing aluminum alloy melt, wherein the aluminum alloy melt is prepared from the following materials in parts by weight: 55-65 parts of 3003 aluminum ingots, 32-42 parts of waste aluminum products, 5-10 parts of boron carbide and 5-10 parts of nanometer quartz sand powder, and the fineness of the boron carbide is 5 microns to 8 microns; adding the materials to a smelting furnace; scattering a layer of covering agent to the surface of the melt to cover the melt when the furnace materials are heated up to be softened and collapsed, wherein the covering agent comprises the following components in parts by weight: 10-20 parts of CaO, 10-25 parts of Al2O3, 35-45 parts of SiO2, 12-30 parts of C and 12-23 parts of coal ashes. According to the smelting preparation method disclosed by the invention, the waste aluminum materials are added to the material ingredients for facilitating the stabilizing of the performances of the aluminum section bar and reducing the possibility that the quality of the aluminum section bar is affected by undetected materials during the smelting process of the melt. The ingredients are further optimized and the hardness and strength of the aluminum alloy are increased, so that the comprehensive performances of the aluminum alloy section bar are improved; and the chromizing treatment is carried out on the surface of the aluminum alloy section bar, so that the corrosion resistance of the oxide film on the surface of the aluminum alloy section bar and the binding force of the aluminum alloy section bar and the coating are improved.
Owner:江苏兴甬铝业科技有限公司

Thermochromic glass

InactiveCN107718777AImprove light absorption capacityImproves strength and hardnessSynthetic resin layered productsGlass/slag layered productsProtective glassesSilver sulfide
The invention discloses thermochromic glass. The thermochromic glass comprises anti-scratching film layers, protective glass layers, a thermochromic layer, arc-shaped rims, filling grooves, adhesion layers and shading gratings, wherein the thermochromic layer is designed in a center layer of the thermochromic glass, the protective glass layers are adhered to the upper and lower surfaces of the thermochromic layer, the anti-scratching film layers are adhered to the outer end surfaces of the protective glass layers, and the arc-shaped rims are designed at the outer ends of the left and right sides of the thermochromic glass and are filled with the adhesion layers. The thermochromic layer of the thermochromic glass is prepared by the steps of adding a small amount of silver sulfide into sodium aluminum borate glass as a photosensitizer, adding a trace amount of copper and cadmium ions as a sensitizer, preparing glass through fusion, carrying out thermal treatment at a proper amount to accumulate silver sulfide into particles; and the thermochromic layer is capable of effectively absorbing thermal radiation or long wave light, and light transmitting the thermochromic layer under burning sun becomes soft, shady and cool, so that the light blocking and absorbing capacities of glass are enhanced, and the hardness and the strength are enhanced.
Owner:安徽光为智能科技有限公司

Aluminum alloy used for casting pot and manufacturing method of aluminum alloy

The invention discloses an aluminum alloy used for casting a pot and a preparing method of the aluminum alloy. The aluminum alloy is formed by smelting an aluminum alloy base body and an additive. The additive is composed of iron powder, magnesium oxide powder, rare earth fluoride, nano-zinc powder, potassium permanganate, rutile powder, sodium fluosilicate, modified silicon dioxide, bentonite and sodium carbonate. The modified silicon dioxide is formed by adding acetic acid into a deionized water solution of tetraethyl orthosilicate for hydrolysis. Due to the fact that the substance including the iron powder, the magnesium oxide powder, the nano-zinc powder and the like is added into the aluminum alloy base body, the potassium permanganate is decomposed to generate oxygen and manganese dioxide at a high temperature, the generated manganese dioxide can be arranged in the aluminum alloy base body in a filling manner to enhance wear resistance of the base body, furthermore, the iron powder in the aluminum alloy can be oxidized, and therefore iron oxide, magnesium oxide and aluminum oxide can be combined at the high temperature to generate wild phases similar to iron-aluminum spinel and magnesia-aluminum spinel; and the wild phases are dispersed and distributed in a whole system, and therefore the melting point, strength and wear resistance of the final aluminum alloy are improved.
Owner:PINGDINGSHAN MEIYI METAL PROD

Molding pipe split-flow mold

The invention relates to a molding pipe split-flow mold which comprises a tail mold sleeve, a front mold sleeve, a transition support fixedly arranged between the tail mold sleeve and the front mold sleeve in a connecting mode, a mouth mold fixedly connected with a front end portion of the front mold sleeve, a split-flow support with a rear tail portion provided with a cone structure, and a core mold fixedly connected with a front end portion of the split-flow support. The split-flow support is contained in an inner cavity of the tail mold sleeve, an inner cavity of the transition support and an inner cavity of the front mold sleeve. The core mold is located in the mouth mold and coaxially arranged with the mouth mold. A flow pass used for passing of molten state materials is formed together between the outer wall face of the split-flow support and the inner wall face of the tail mold sleeve, the transition support and the front mold sleeve, and between the outer wall face of the core mold and the inner wall face of the mouth mold. At least one boss arching toward the flow pass is formed on the outer wall face of the core mold or the inner wall face of the mouth mold along the circumferential direction. The flow pass form a throat part with a decrescent cross section on the boss position. The molding pipe split-flow mold can improve density of molten materials in the flow pass, and enables intensity of molded plastic molding pipe products to be improved; and at the same time, utilization rate of a mold is also improved.
Owner:SUZHOU JWELL MACHINERY

Casting die based on 3D printing and preparation method thereof

The invention provides a casting die based on 3D printing. The casting die based on 3D printing comprises a component I and a component II obtained through 3D printing. A cavity of the component I and a cavity of the component II are each filled with a resin fiber layer, a fiber layer and a foaming layer from outside to inside in sequence. A preparation method of the casting die comprises the steps of (1) modeling: segmenting a model into a plurality of components connected through dovetail grooves; (2) using a 3D printer to conduct printing to obtain a plurality of components of a hollow structure; (3) machining a filling port in the plane of each component; (4) filling up a cavity of each component with a mixture of slow dry resin and reinforce fiber; (5) adding glass fiber into the cavity of each component; (6) injecting a foam material into the cavity of each component; (7) connecting the components through the dovetail grooves; and (8) filling up gaps of the dovetail grooves with A/B glue, conducting coating of epoxy resin and then conducting grinding and polishing. The casting die based on 3D printing and the preparation method thereof have the advantages that the precision is high, the preparation cycle is short, the weight is low, the die strength is high, and the production cost is low.
Owner:柳州智云科技有限公司

Preparing method and application of laser cladding precipitation-hardening stainless steel wear-resisting anti-corrosion coating

The invention discloses a preparing method and application of a laser cladding precipitation-hardening stainless steel wear-resisting anti-corrosion coating. A basis material is 1Cr15Ni4Mo3N precipitation-hardening stainless steel and comprises, by weight percentage, 0.11%-0.16% of C, 0.5%-1.0% of Mn, 2.3%-2.8% of Mo, 4.0%-5.0% of Ni, 14.0%-15.5% of Cr, 0.05%-0.10% of N, not larger than 0.7% of Si, not larger than 0.02% of S, not larger than 0.03% of P and the balance Fe; and a cladding layer material comprises, by weight percentage, 10.65%-12.50% of C, 2.36%-2.77% of Mo, 4.08%-4.79% of Ni, 11.18%-13.12% of Cr, 1.96%-6.02% of N, 0.23%-0.37% of Al, 0.16%-0.25% of Si, not larger than 0.05% of S, not larger than 0.05% of P and the balance Fe. A synchronous powder feeding manner is adopted for feeding cladding layer powder to the positions below laser beams through a powder feeder to be melted, the cladding layer powder solidifies on the base surface to form a cladding layer, and the laser cladding precipitation-hardening stainless steel wear-resisting anti-corrosion coating is used for rotor hubs of large business machines, air battle machines and helicopters in the field of spaceflight, aviation and ocean and is used for fasteners and force bearing parts with high wear resistant and corrosion resistant requirements.
Owner:国营芜湖机械厂

High-strength high-corrosion-resistance anti-microbial stainless steel and preparation method thereof

The invention discloses high-strength high-corrosion-resistance anti-microbial stainless steel and a preparation method of the high-strength high-corrosion-resistance anti-microbial stainless steel. The stainless steel has high performance, particularly high antibacterial property, high safety, ultra-high strength, high corrosion resistance, high wear resistance and good toughness. Compared with existing stainless steel for cutters, the high-strength high-corrosion-resistance anti-microbial stainless steel has the advantages of high hardness, high corrosion resistance, good antibacterial property and the like. Compared with steel for existing cutters, the content of carbon and chromium is adjusted in components, the silver element and the rare earth element are added, so that the materialhas high hardness and sharpness besides corrosion resistance and antibacterial property, the requirements of consumers can be met, and the grade of the cutters is improved. The steel has the high hardness of 56.0-60.0HRC, high pitting corrosion resistance and salt fog resistance. The steel is applicable to tools such as kitchen knives, scissors and the like, and can also be applied public facilities, household appliances and medical appliances.
Owner:SHANGHAI UNIV

Multi-component concrete surface reinforcing agent and reinforcing method thereof

The invention provides a multi-component concrete surface reinforcing agent and a construction method thereof. The reinforcing agent is prepared from a component A, a component B and a component C. The component A comprises, in parts by weight, 10-15 parts of sodium alginate, 0.5-3 parts of fluorocarbon surfactant, 1-3 parts of nano silicon dioxide and water supplementing to 100 parts; the component B comprises, in parts by weight, 1 to 5 parts of fluorocarbon surfactant, 10 to 20 parts of soluble silicate, 10 to 15 parts of soluble fluosilicate, 0.1 to 2 parts of water reducing agent and water supplementing to 100 parts; and the component C comprises, in parts by weight, 5-10 parts of soluble calcium salt, 0.5-3 parts of a fluorocarbon surfactant and water supplementing to 100 parts. Sodium alginate permeates into the deep layer in the concrete and reacts with Ca<2+> to generate an insoluble gel system to block pores in the deep layer of the surface; soluble silicate and fluosilicatepermeate and react with Ca<2+> to generate gel of a cross-linked structure, pores in the surface layer of the surface are blocked, concrete is compacted fundamentally through cooperation of two timesof blocking, invasion of water, oil and other corrosive substances is effectively inhibited, and the durability of the concrete can be greatly improved.
Owner:北京建中新材科技有限公司
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