21results about How to "Efficient preparation process" patented technology

The invention provides a preparation method of rotaxane mechanical interlocking molecules. According to the preparation method, under the condition of not adding a catalyst, dibenzene-24-crown-8, benzene-21-crown-7, an isocyanate derivative and a rod-shaped compound are subjected to a reaction by adopting a one-pot method to obtain the rotaxane mechanical interlocking molecule. The preparation method not only can reach 100% of atom economy and meet the requirements of green chemistry, but also can reach the yield of 65% or above, and realizes efficient preparation of rotaxane mechanical interlocking molecules.

The present invention relates to the technical field of thermally conductive polyester films, and specifically to a flexible high thermal conductivity graphene-filled polyurethane composite film and a preparation method thereof. Conventional graphene-modified polyurethane thermally conductive films have good horizontal thermal conductivity, but poor vertical thermal conductivity. In view of the above problems, the present invention provides a flexible high thermal conductivity graphene-filled polyurethane composite film, wherein the material system contains graphene, carbon quantum dots and a one-dimensional film-forming agent at the same time, and the graphene, carbon quantum dots and the one-dimensional film-forming agent are interconnected, interspersed and stacked to form a complex three-dimensional network structure, and the filler particles are distributed more evenly and densely in the polyurethane resin matrix, which significantly improves the thermal conductivity of the obtained flexible high thermal conductivity graphene-filled polyurethane composite film.

The invention discloses a CMAS corrosion resistant novel gradient structure thermal barrier coating and a preparation method thereof, and belongs to the technical field of thermal barrier coatings. The novel gradient structure thermal barrier coating comprises a base body, a spraying state NiCrAlY bonding layer, a spraying state 8YSZ ceramic layer, a spraying state LaYbZrCeO7 ceramic layer and a laser glazing LaYbZrCeO7 ceramic layer from bottom to top, the base body is made of nickel base alloy, and 8YSZ is ZrO2 stabilized by Y2O3 with the mass fraction of 8%. The design thought that the laser glazing compact ceramic layer and the spraying state porous ceramic layer are introduced into the thermal barrier coating structure is adopted, the excellent molten CMAS corrosion resistance can be achieved, meanwhile, the low thermal conductivity is achieved, and wide application prospects are achieved in the field of thermal barrier coating materials.

The present invention provides a zirconia aerogel-modified lightweight heat-insulating fiber preform and a preparation method thereof, which belongs to the field of heat-insulating composite materials. The preparation method of the zirconia aerogel-modified lightweight heat-insulating fiber preform comprises the following steps: mixing a zirconium compound, a solvent, a pH regulator, a cross-linking agent, a pore structure control agent and a drying control agent to obtain a zirconium dioxide aerogel precursor solution; immersing the fiber preform in the zirconium dioxide aerogel precursor solution and adding a gel accelerator, and obtaining a zirconia aerogel-modified lightweight heat-insulating fiber preform through gel reaction, solvent replacement, drying and heat treatment. The preparation method of the zirconia aerogel-modified fiber preform provided by the present invention solves the problems of large shrinkage, poor stability, high molding difficulty and high cost in the preparation of traditional ZrO2 aerogels, and is suitable for mass production.

The invention provides rubber for an underground carry-scraper tire, a preparation method of the rubber and the underground carry-scraper tire. The preparation method of the rubber for the underground carry-scraper tire comprises the following steps: S1, mixing a vulcanizing aid, a filler, rubber and a first solvent to obtain a pre-mixture, and continuously introducing the pre-mixture into a reactor for solvent separation to obtain a rubber master batch; s2, after the master batch is internally mixed, protective wax and tear-resistant resin are added for mixing, and first-section master batch is obtained; s3, mixing the primary masterbatch with a first accelerant and a first vulcanizing agent, and performing final mixing to obtain final mixed rubber; and S4, performing vulcanization treatment on the final mixed rubber to obtain vulcanized rubber. The rubber material prepared by the method for continuously preparing the master batch has excellent processability and mechanical property, and the prepared vulcanized rubber has excellent tensile property, tearing property and the like, can adapt to harsh working environments, and is particularly suitable for preparing underground carry-scraper tires.

The invention belongs to the technical field of polyformaldehyde materials, and particularly relates to a composite material for enhancing the toughness of a polyformaldehyde material and a preparation method of the composite material. Comprising the following components in parts by weight: 100 parts of polyformaldehyde, 10-20 parts of modified polyethylene, 5-15 parts of modified polytetrafluoroethylene, 5-10 parts of a flexibilizer, 8-15 parts of a modified filler, 0.8-1.2 parts of an antioxidant, 1-1.5 parts of a lubricant and 0.1-0.3 part of a light stabilizer. The prepared composite material for enhancing the toughness of the polyformaldehyde material is good in toughness, good in wear resistance and suitable for preparing heavy-load mechanical parts.

The invention discloses an iron runner castable containing pre-synthesized EG-SiC and a preparation method of the iron runner castable, and belongs to the technical field of amorphous refractory castable. The iron runner castable is prepared from the following raw materials in percentage by mass: 10 to 17 weight percent of tabular corundum, 7 to 13 weight percent of composite micro powder, 12 to 25 weight percent of silicon carbide, 1 to 3 weight percent of calcium aluminate cement, 1 to 3 weight percent of spherical asphalt, 0.1 to 0.2 weight percent of explosion-proof fiber, 2 to 5 weight percent of composite additive and the balance of brown aluminum oxide particles, 1 to 3 weight percent of pre-synthesized EG-SiC is additionally added; wherein the pre-synthesized EG-SiC is formed by in-situ growth of nano silicon carbide whiskers between vermicular expanded graphite lamellar structures. The iron runner castable is high in early bonding strength, the slag resistance of the iron runner castable is remarkably improved, the high-temperature mechanical property and the thermal stress damage resistance of the material are improved, and the iron runner castable has important application prospects.

The invention discloses a preparation method of a Ni (Al) micro-nano fiber porous material. The method comprises the following steps: 1, smelting elemental nickel and elemental aluminum, and processing to obtain a precursor material; 2, putting sodium hydroxide or potassium hydroxide solid into deionized water, and uniformly stirring to prepare a fibrosis solution; 3, placing the precursor material in a fibration solution, heating, and carrying out fibration reaction to obtain a Ni (Al) fiber porous pre-sintering body; and 4, sintering and curing the Ni (Al) fiber porous pre-sintering body to obtain the Ni (Al) micro-nano fiber porous material. According to the preparation method, an in-situ dealloying method is combined with an in-situ diffusion sintering fibrosis method, the Ni (Al) micro-nano fiber porous material with the micro-nano scale (the wire diameter is 200 nm-1 mu m) and uniform pore distribution is prepared, the porosity and pore precision of the porous material are improved, more catalyst reaction active sites are brought, and the preparation method is suitable for the fields of hyperfine filtration and catalysts.

The invention provides a separation and recovery method and application of a waste high-nickel ternary battery, and relates to the technical field of lithium ion batteries. Specifically, waste high-nickel ternary battery powder is subjected to a reduction acid leaching reaction in sequence, and a carbonaceous solid phase and a first liquid phase are obtained; the first liquid phase is extracted through a copper extraction agent, and a copper-rich organic phase and a raffinate water phase are obtained; sequentially carrying out alkali precipitation reaction on the raffinate water phase to obtain a hydroxide solid phase and a second liquid phase; wherein the second liquid phase is subjected to an aluminum removal reaction, then carbonate is added, solid-liquid separation is performed to obtain lithium carbonate, the hydroxide solid phase is sequentially subjected to reduction ammonia leaching to obtain a third liquid phase, and extraction separation and reverse extraction are further performed to obtain a nickel sulfate solution. According to the method, lithium carbonate is prepared by adopting front-end lithium extraction, nickel sulfate is prepared by carrying out ammonia leaching extraction on the nickel-cobalt-manganese hydroxide after lithium extraction, the lithium-nickel product with high recovery rate and high purity can be obtained while the method with high efficiency and short process is obtained, and the method has a good application prospect.

The invention relates to the technical field of piezoelectric material preparation, and discloses stacked high-voltage-resistant piezoelectric ceramic and a manufacturing method thereof. The stack type high-voltage-resistant piezoelectric ceramic comprises an insulating sheet, a piezoelectric ceramic sheet, an electrode, an electric lead and an insulating layer. The piezoelectric ceramic pieces are stacked between the two insulating pieces, and the positive electrode faces and the negative electrode faces of every two adjacent piezoelectric ceramic pieces are arranged in opposite directions. The electrodes include a positive electrode and a negative electrode. The electrode plates are connected in series through the connecting beams. The electrodes and the piezoelectric ceramic pieces are alternately stacked and bonded. And the two electric leads are respectively connected with the positive electrode and the negative electrode. The insulating layer wraps the insulating sheets, the piezoelectric ceramic sheets and the electrodes and fills the arc-shaped cavities connected with the cross beams. The invention has the advantages of same volume, low electrostatic capacity, better dynamic performance under the condition of preloading force and high voltage resistance, so that the invention can be normally used in special environments such as high voltage, high humidity and the like. The manufacturing process is simple, the efficiency is high, and the product has the characteristics of stability and high pressure resistance.

The invention relates to the technical field of battery materials, in particular to rich-pore iron phosphate, lithium iron phosphate and a preparation method thereof.The preparation method of the rich-pore iron phosphate comprises the following steps that 1, a phosphorus source, an oxidizing agent and an iron source are mixed for a reaction, and slurry a is obtained; (2) filtering and separating the slurry a to obtain a filter cake b; (3) pulping the filter cake b, adding phosphoric acid to enable the molar ratio of Fe to P in the slurry to be 0.96-0.99, adjusting the pH value of the system to be 1.0-1.5, and crystallizing to obtain slurry c; and (4) filtering the slurry c, washing the slurry, drying, and calcining to obtain the product. By controlling the process conditions of the iron phosphate, the iron phosphate with abundant pores and high specific surface area is obtained, and the lithium iron phosphate positive electrode material with excellent and stable low-temperature performance is prepared by taking the pore-rich iron phosphate as a raw material through a carbon thermal reduction method.

The invention provides a catalyst for synthesizing 1, 4-cyclohexanedimethanol as well as a preparation method and application thereof, and the preparation method comprises the following steps: dissolving soluble zinc salt, calcium salt, copper salt, nickel salt, magnesium salt and assistant salt in deionized water to obtain a mixed solution; adding a certain amount of alkaline precipitant into the mixed solution, adding silicide after a certain time, and heating in an oil bath at 80-140 DEG C for 1-8 hours to obtain a first sticky material; and centrifuging the first sticky material, washing, drying, roasting at 300-800 DEG C for 4-8 hours to obtain the catalyst, and sequentially tabletting, crushing and screening the catalyst. According to the catalyst prepared by a novel deposition method, on the basis of ensuring excellent and stable performance of the catalyst, better catalytic performance can be obtained at lower pressure and temperature, and the cost and danger of industrial production are reduced.

The invention discloses a slip ring electric signal transmission device based on a robot mechanical arm motor driving rotating shaft, which comprises a female plate (MH01) and a male plate (GH01) which are coaxially arranged, concentric copper rings with the same number and specification are respectively mounted on opposite surfaces of the female plate (MH01) and the male plate (GH01), two opposite copper rings form a group, each group of copper rings are in contact through a metal probe (TZ01), and the metal probe (TZ01) is in contact with the female plate (MH01) and the male plate (GH01). Each group of copper rings is used for transmitting one kind of electric signals. According to the device, by optimizing the connecting structure between the mechanical arm rotating shaft and the sliding ring, efficient and stable electric signal transmission is achieved, the abnormal problem in traditional signal transmission is avoided, the signal transmission quality is improved, and accurate control over a robot system is ensured.

The application discloses a composition for full-component utilization of white kidney beans and a preparation method and application thereof, and the composition is prepared by separating and extracting white kidney beans to obtain alpha-amylase inhibitors (alpha-AI), and the alpha-AI is double-embedded by using self-source wall materials, so that the inhibitory activity is improved to more than 10000 U / g, all components in the composition are derived from the white kidney beans, the utilization rate of raw materials is improved to 95%, full extraction and efficient utilization of the white kidney beans are realized. In addition, the combination of the self-source wall materials and the double-embedded structure improves the stability of the composition, so that the composition still has an activity of more than 85% at 90 DEG C, and can adapt to various processing environments. The composition further adds dietary fibers, is suitable for adjusting postprandial blood glucose level, can be mixed with rice flour or other auxiliary materials to prepare food with a low glycemic index (GI), and is suitable for low GI food development, weight management, intestinal improvement and the like.

The invention relates to an artificial island and a sinking method and a floating method thereof, the artificial island comprises a caisson module, and the caisson module comprises a box body provided with a containing cavity; the vertical pile is connected with the bottom of the box body; the liquid passing assembly communicates with the containing cavity and is configured to enable the box body and the vertical pile to sink when liquid is injected into the containing cavity, so that the vertical pile is inserted into the seabed; and when the liquid in the accommodating cavity is discharged, the box body and the vertical pile float upwards. And the caisson modules can be subjected to unified modular construction on the land, so that the construction period on the sea is shortened. A tugboat is adopted to transfer the caisson module to a preset sea area, the liquid passing assembly can inject liquid into the containing cavity, the box body containing water drives the vertical pile to sink till the vertical pile is inserted into the seabed, and floating of the caisson module can be avoided through the acting force between the vertical pile and the seabed. The box body has certain structural strength, the stability of the worker island foundation is guaranteed, the space in the containing cavity is filled with water, a large amount of earth and stone does not need to be used for filling a preset sea area, and the offshore engineering amount is reduced.

The application discloses a high-temperature gradient structure thermal barrier coating and a preparation method thereof, and belongs to the technical field of thermal barrier coatings.The high-temperature gradient structure thermal barrier coating comprises, from bottom to top, a substrate, a bonding layer, an 8YSZ layer and a rare earth zirconate layer.The bonding layer is made of NiCrAlY alloy; the 8YSZ layer is ZrO2 stabilized by 8% mass fraction of Y2O3; and the chemical composition of the rare earth zirconate layer is LaYbZrCeO7.The application introduces the rare earth doping and double-layer structure design idea into the structure of the thermal barrier coating, so that low thermal conductivity, high thermal expansion coefficient and excellent thermal cycle life can be obtained, and the application has a wide application prospect in the field of thermal barrier coating materials.

The invention discloses a preparation method and application of graded lignin high-stability anion dispersed rosin size, and the preparation method comprises the following steps: step 1, weighing a lignin raw material, mixing with an ethanol solution, and continuously stirring at room temperature; performing vacuum filtration to obtain a lignin solution dissolved in ethanol; carrying out rotary evaporation on the solution to recover ethanol, drying the residual solid, and grinding to obtain the low-molecular-weight lignin L95; and 2, fully mixing low-molecular-weight lignin L95 and rosin in absolute ethyl alcohol, magnetically stirring the solution, carrying out rotary evaporation to recover absolute ethyl alcohol, and drying residues in a drying oven to obtain the graded lignin high-stability anion dispersed rosin size. The lignin anion dispersed rosin size with high stability and high sizing performance is prepared, rosin in the sizing agent ensures good hydrophobicity of the sizing agent, the preparation process is efficient, reaction conditions are mild and controllable, and the lignin anion dispersed rosin size has wide application prospects.

A silver-graphene composite coating and a preparation method and application thereof belong to the technical field of electrical materials, and overcome the defects of high contact resistance, poor corrosion resistance, heat dissipation and wear resistance in the prior art. The silver-graphene composite coating of the present invention comprises a first nanosilver layer, a silver-graphene layer and a second nanosilver layer sequentially arranged on a substrate. The thermal conductivity of the silver-graphene composite coating provided by the present invention is ≥330W / m·K; the hardness is ≥80HV; the surface contact resistance is <20μΩ; the dynamic friction coefficient of the coating is ≤0.25; the environmental corrosion resistance of the coating satisfies the anti-sulfur test in 1% Na2S solution within 5h without discoloration, and the anti-sulfur test in 5% Na2S solution is 1h without discoloration.

The invention belongs to the technical field of material preparation, and relates to a polyarylene ether nitrile wear-resistant dielectric composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, synthesizing poly (arylene ether nitrile) matrix resin with a phthalonitrile-terminated biphenyl structure by adopting a nucleophilic substitution reaction, and secondly, introducing a copper phthalocyanine modification layer on the surface of a molybdenum disulfide nanosheet by utilizing a chemical grafting method, so as to prepare the novel functional nanofiller. The cyano group of copper phthalocyanine in the functionalized nanofiller not only can improve the compatibility between the molybdenum disulfide nanosheet and the polyarylene ether nitrile matrix, but also can be chemically crosslinked with the cyano group of the matrix resin, and then the cyano group and the cyano group are combined through a film casting method and then subjected to a solid-phase chemical reaction to prepare the composite material. The molybdenum disulfide nanosheets have the effects of improving the wear resistance and the dielectric constant, and the finally prepared composite material has the advantages of high glass transition temperature, high dielectric constant, excellent wear resistance, low friction coefficient, good processability, simple and efficient preparation process, and suitableness for large-scale production and application.

The invention provides a preparation method of nano elemental iron in simulated lunar soil, and belongs to the field of celestial body simulation materials. The preparation method of the nano elemental iron in the simulated lunar soil comprises the following steps: taking iron-containing mineral powder, heating to the highest temperature at the heating rate of more than or equal to 600 DEG C / s in a vacuum environment, and immediately cooling; the highest temperature is 2000-3500 DEG C, and the cooling rate is greater than or equal to 50 DEG C / s. The preparation process provided by the invention is simple and efficient, large-scale production can be realized, the preparation process reproduces the formation process of the nano elemental iron in the real lunar soil to a certain extent, and the prepared nano elemental iron has similar morphology and size with the nano elemental iron in the real lunar soil. By changing the temperature system, such as the highest heating temperature and the heating rate, the nano-micro structure, such as the size of the nano elemental iron, can be regulated and controlled.

The invention discloses a preparation method of perovskite nanocrystals, irradiation-resistant perovskite vulcanized silicone rubber and a preparation method of the irradiation-resistant perovskite vulcanized silicone rubber, and belongs to the technical field of organic silicon materials. The preparation method of the perovskite nanocrystal comprises the following steps: (1) adding AX and BX2 into a solvent A, and fully dissolving to obtain a mixed solution; (2) ligands are added into the mixed solution, ultrasonic treatment is carried out until the ligands are fully dissolved, a uniform precursor solution is obtained, and the ligands are lewis acid and amino silane; (3) adding the precursor solution into a solvent B, and stirring for reaction; and (4) carrying out centrifugal treatment on the product obtained in the step (3), wherein the obtained precipitate is the ABX3 perovskite nanocrystal. The prepared perovskite nanocrystalline can improve the radiation resistance and aging resistance of vulcanized silicone rubber, can be widely applied to the fields of aerospace, nuclear industry, chemistry and chemical engineering, medical protection and the like, and has good social benefits and economic benefits.