85results about How to "Suitable for mass manufacturing" patented technology

The invention discloses a monatomic catalyst for activating peroxymonosulfate as well as a preparation method and application of the monatomic catalyst. The catalyst comprises a nitrogen and sulfur co-doped Ti3C2Tx nanosheet and an iron monatomic or cobalt monatomic targeted on the nanosheet in an asymmetric coordination structure. The preparation method comprises the following steps: mixing the Ti3C2Tx nanosheet, a precursor containing a nitrogen source and a sulfur source, and soluble metal salt, self-assembling, freeze-drying and pyrolyzing. The monatomic catalyst provided by the invention has excellent conductivity and electronic structure, can form a large amount of reactive oxygen species in a catalytic degradation system on the premise of low addition amount of peroxymonosulfate, and has the advantages of high activation efficiency on peroxymonosulfate, capability of effectively reducing the usage amount of peroxymonosulfate and the like; the peroxymonosulfate can be activated to achieve efficient purification of organic wastewater, the operation cost of the peroxymonosulfate activation technology can be effectively reduced, and meanwhile, the new environmental pollution risk caused by the fact that a large amount of peroxymonosulfate is used can be remarkably reduced.

The invention discloses a preparation method of 1alpha-hydroxyl dinorhydrin, the structural formula of the 1alpha-hydroxyl dinorhydrin is shown as a formula (1), the method comprises the following steps: by taking dinorhydrin shown as a formula (2) as a raw material, preparing the 1alpha-hydroxyl dinorhydrin through five steps of acylation, bromination, debromination, epoxidation / hydrolysis and ring opening, and the reaction formula is as follows: # imgabs0 #. All reactions are carried out under normal pressure, reagents with high toxicity are not used in the reaction process, the reaction yield is high, the total yield of the five-step reaction can reach 48.46%, and the method is suitable for industrial production.

The invention relates to a rare earth AB2 type hydrogen storage alloy and a preparation method and application thereof, the preparation method of the rare earth AB2 type hydrogen storage alloy comprises the following steps: (1) refining a rare earth component and a Cr component and / or a VFe component in a Ti-Zr-Cr-Mn-VFe raw material to obtain an alloy ingot; and (2) after the alloy ingot obtained in the step (1) is subjected to surface treatment, the alloy ingot and remaining components in the Ti-Zr-Cr-Mn-VFe raw materials are subjected to smelting treatment, and the rare earth AB2 type hydrogen storage alloy is obtained. The Cr and / or VFe components and the rare earth elements are refined to improve the purity, and then the refined alloy is used as the raw material for smelting, so that the purposes of reducing the impurity content of the alloy and improving the hydrogen storage performance are achieved.

The invention discloses iridium-cobalt oxide nanoparticles as well as a preparation method and application thereof. The iridium-cobalt oxide nanoparticles comprise a cobaltosic oxide carrier and supported iridium oxide. The preparation method comprises the following steps: 1) preparing an iridium salt-cobalt salt aqueous solution; 2) preparing a reaction solution of a complex containing iridium ammonium salt and cobalt; (3) preparing an iridium hydroxide-cobalt complex compound; and 4) grinding the iridium hydroxide-cobalt complex compound, placing the ground complex compound in an oxygen-containing atmosphere for heat treatment, and then carrying out water washing and drying. The iridium-cobalt oxide nano-particles are low in iridium content, small and uniform in particle size and simple in preparation method, have the advantages of being high in electrochemical activity, good in electrochemical stability and the like when being used as an OER reaction catalyst, and are suitable for large-scale industrial application in the field of hydrogen production through water electrolysis.

The invention discloses a high-temperature-resistant film composite sensor and a preparation method thereof. The sensor comprises a YSZ coating, an Al2O3 layer, a SiO2 layer, a functional layer and a composite protection layer which are sequentially arranged on the surface of a metal substrate from bottom to top. The preparation method comprises the following steps: spraying the metal substrate, spraying the YSZ coating, polishing, preparing the Al2O3 layer, carrying out heat treatment, preparing the SiO2 layer and the composite protective layer, and carrying out heat treatment on the composite protective layer. The high-temperature-resistant film composite sensor can stably work for 48 hours under the ultrahigh-temperature condition of 1500 DEG C under the combined action of the films, has the advantages of being high in detection precision, long in service life and the like, and can be used for measuring working parameters of engine blades at high working temperature and high rotating speed at the same time. Meanwhile, the preparation method has the advantages of being simple in process, convenient to operate, low in preparation cost, high in yield and the like, is suitable for large-scale preparation and facilitates industrial application.

The invention provides a preparation method capable of preparing high-purity ZrC powder on a large scale and ZrC powder.The preparation method comprises the steps that firstly, zirconium metal salt, deionized water, organic ligands and absolute ethyl alcohol are subjected to ultrasonic mixing, and a metal salt solution and an organic solution are obtained; pouring the organic solution into the metal salt solution to form a mixed solution, and ultrasonically removing gas in the solution; dropwise adding a small amount of ammonia water into the mixed solution, shaking, performing ultrasonic treatment to enable the solution to be uniform, and standing for a period of time to obtain metal organic gel; centrifugally cleaning the gel, and drying the cleaned gel in a drying oven at a certain temperature to obtain dry gel powder; and finally, putting the dry gel powder into a graphite crucible, and carrying out high-temperature cracking in a vacuum carbon tube furnace to obtain the high-purity ZrC powder. Impurities are prevented from being introduced into a traditional ball milling process, the metal organic gel can achieve uniform combination of metal ions and organic ligand atoms, the ZrC powder is endowed with the excellent characteristics of 50-200 nm nanoscale size, high purity, uniform distribution, spherical morphology and the like, and meanwhile the preparation method is short in period, low in temperature, low in cost, environmentally friendly in raw material and suitable for industrial production. The method is easy to control and suitable for large-scale preparation.

The invention provides a high-durability super-amphiphobic aircraft anti-icing coating and a preparation method thereof.The preparation method comprises the steps that silicon dioxide nanoparticles are loaded on the surfaces of micron attapulgite particles in situ to prepare core-shell structure micro-nano composite particles, and low-surface-energy fluorosilane is added for modification; meanwhile, fluorinated modification is conducted on a waterborne polyurethane adhesive through fluorosilane, the modified micro-nano particles are introduced into the modified polyurethane adhesive, then the surface of semi-cured airplane paint is evenly sprayed with the modified polyurethane adhesive, and the super-amphiphobic anti-icing coating is prepared through curing. The super-double hydrophobic surface prepared by the method shows excellent repellency to liquids (water, rapeseed oil, lubricating oil and hexadecane) with different surface tensions, can delay icing of liquid drops on the surface of a coating for 440 seconds at-15 DEG C, and has excellent comprehensive protection performance of wear resistance, airflow impact resistance, oil stain resistance and acid and alkali corrosion resistance; good super-amphiphobic performance can be kept after mechanical wear and chemical corrosion.

The invention relates to a preparation method of a lead-chalcogenide quantum dot material, simultaneously protects the lead-chalcogenide quantum dot material prepared by adopting the method and application of the material, and belongs to the technical field of compound semiconductor materials. The preparation method specifically comprises the following steps: dissolving lead halide and a chalcogenide precursor in N, N-dimethylformamide; the preparation method comprises the following steps of: adding the lead sulfide into N, N '-dimethylformamide to form a precursor solution A, dissolving oleylamine into toluene to form a precursor solution B, adding the precursor solution A into the precursor solution B, adding ethanol after the reaction is finished, and centrifugally separating to obtain the lead-sulfur group quantum dot with the oleylamine and halogen co-coordinated, the quantum dot can generate the lead-sulfur group quantum dot in which oleic acid and halogen are co-coordinated through ligand exchange. The lead-sulfur group quantum dot material disclosed by the invention has the advantages of simple preparation method and high yield, and has the characteristics of adjustable material wavelength, high luminous efficiency and the like when being used in a luminescent device.

The invention discloses a super-hydrophobic metal organic framework composite material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing an amino-modified ZIF material with polylactic acid with the number-average molecular weight of 1.0 * 105 g / mol to 2.5 * 105 g / mol, and carrying out amidation reaction to obtain the super-hydrophobic metal organic framework composite material. In the invention, the amino-modified ZIF material is modified by polylactic acid, so that the super-hydrophobic metal-organic framework composite material which is low in cost, good in hydrophobicity, good in stability, green and environment-friendly can be prepared, and the super-hydrophobic metal-organic framework composite material can be widely applied to wastewater treatment, air purification and sensor preparation; the method has potential application in the aspects of solving the greenhouse effect, industrial gas adsorption and separation, oil-water separation and the like, and has a good application prospect. The preparation method also has the advantages of simple process, convenience in operation, mild preparation conditions and the like, is suitable for large-scale preparation, and is convenient for industrial application.

The invention provides a preparation method of a rare earth AB2 type hydrogen storage alloy, which comprises the following steps: (1) mixing a raw material A and a first rare earth metal, and sequentially carrying out first smelting and post-treatment to obtain a high-purity A cast ingot; the raw material A comprises sponge Ti and / or sponge Zr; and (2) mixing the source A, the source B and second rare earth metal, and carrying out second smelting to obtain the rare earth AB2 type hydrogen storage alloy, the A source comprises the high-purity A cast ingot in the step (1) and an optional A raw material; the B source comprises a Cr source and / or a Mn source. The rare earth metal and the raw material A are refined through first smelting, the purity of the metal raw material can be effectively improved, the hydrogen storage alloy is prepared through second smelting of the high-purity A cast ingot, the platform pressure of the hydrogen storage alloy is more stable, lag and residue are lower, and the hydrogen absorption and desorption performance is effectively improved.

The invention discloses a method for preparing tobacco sheets by utilizing tobacco-based cellulose nanofibrils, which comprises the following steps of: 1, putting tobacco stem pulp into a conical flask, adding biological enzyme into the tobacco stem pulp for pretreatment, and after the pretreatment is finished, carrying out inactivation treatment and removing residual enzyme liquid in the tobacco stem pulp; 2, pulping the tobacco stem pulp through a PFI pulping machine, and performing high-pressure homogenization treatment to obtain tobacco-based cellulose nanofibrils; 3, wood pulp is selected and compounded with mechanical pulp, lignin rosin sizing agent emulsion, tobacco pulp, PCC and guar gum are added, the tobacco-based cellulose nanofibrils are added into the pulp, sheet making is conducted on a rapid sheet forming device, and the tobacco sheets are obtained. According to the method, the tobacco-based cellulose nanofibrils are efficiently and safely separated from the tobacco stem pulp through a feruloyl esterase / cellulase combined mechanical method for the first time, the tobacco sheets are prepared, and the method has the advantages of being environmentally friendly in product, simple in process, high in production efficiency and the like.

The invention discloses an on-chip intermediate infrared frequency doubling polarization composite device and an implementation method thereof. According to the invention, the tellurene nanosheets are adopted to show huge second harmonic generation efficiency in an ultra-wideband region from near infrared to intermediate infrared; the intensity of the optical second harmonic signal is the strongest only when the polarization direction of the incident light is vertical to the a axis of the tellurene nanosheet, and the optical second harmonic signal is delustring when the incident light is orthogonal, so that the extinction ratio is very high; according to the invention, excellent broadband mid-infrared second harmonic generation response is shown, the problem that high-efficiency frequency multiplication conversion of mid-infrared band light is difficult to carry out in an on-chip integration environment is hopefully solved, and a new way is opened up for the development of an advanced photon technology; on the basis of obvious anisotropy of tellurium ene nanosheet-optical second harmonic signals, the polarization of the emergent optical second harmonic signals can be regulated and controlled, and the tellurium ene nanosheet-optical second harmonic signal modulator has the characteristics of multifunctionality and convenience in integration; the method is very suitable for large-scale manufacturing, and cost is saved.

The invention discloses oxidized sodium alginate / polyvinyl alcohol fluorescent hydrogel capable of rapidly gelling as well as a preparation method and application of the oxidized sodium alginate / polyvinyl alcohol fluorescent hydrogel, and belongs to the technical field of hydrogel preparation. The preparation method provided by the invention comprises the following steps: adding sodium periodate into a sodium alginate aqueous solution for oxidation, dialyzing and drying to obtain oxidized sodium alginate; dissolving oxidized sodium alginate in water, adding aminophenylboronic acid and an activating agent, and reacting to obtain a phenylboronic acid-based oxidized sodium alginate solution; and mixing the phenylboronic acid-based oxidized sodium alginate solution with the polyvinyl alcohol solution, and stirring for 8-20 seconds to obtain the water treatment agent. The preparation method disclosed by the invention is simple and convenient, very rapid in gel forming, low in equipment cost and suitable for large-scale preparation; the prepared hydrogel is excellent in swelling property, and emits blue light under ultraviolet irradiation; meanwhile, the property is stable, the pH response and active oxygen response characteristics are achieved, self-healing can be achieved, and good application prospects are achieved in the fields of tissue repair and fluorescent falsification prevention.

The present invention specifically relates to a nano boron carbide / copper composite material and a preparation method thereof. The preparation method mainly comprises the following steps: (1) uniformly mixing high-purity copper powder and micron boron carbide powder; (2) performing additive manufacturing on the mixed powder using selective laser melting technology to form a nano boron carbide / copper composite material; (3) performing hot isostatic pressing densification treatment on the nano boron carbide / copper composite material. The present invention utilizes laser to excite micron boron carbide to melt, and the melted droplets are further refined and reduced by the Marangoni convection of the copper molten pool, and finally realize the uniform dispersion of nano-level boron carbide particles in the copper matrix. The obtained nano boron carbide / copper composite material has good composite effect, high strength and toughness, high conductivity and high thermal stability, and has broad application prospects.

This invention relates to a copper oxide material, its preparation method, and its application. The preparation method includes: mixing an inorganic base, a dispersant stabilizer, and a copper salt in water to form a raw material solution; carrying out a precipitation reaction; washing and drying the precipitated product to obtain the copper oxide material; the pH value of the raw material solution is 13.10-14; the copper salt includes copper acetate. This invention also provides the copper oxide material obtained by the above preparation method and its application in the electrocatalytic reduction of carbon dioxide. The preparation method is simple and controllable, and the prepared copper oxide material exhibits high electrocatalytic carbon dioxide reduction performance.

The invention discloses a simple preparation method of carbon-anchored high-dispersion cobalt nano-particles and a method for removing antibiotics by activating peroxymonosulfate through the carbon-anchored high-dispersion cobalt nano-particles. According to the preparation method, green, environment-friendly and considerable-cost sodium alginate is selected as a raw material, after the sodium alginate and cobalt ions are subjected to cross-linking curing, a round granular cobalt alginate aerogel precursor with the uniform size is prepared through cold drying, and the round granular cobalt alginate aerogel precursor is subjected to high-temperature calcination to synthesize the carbon-anchored high-dispersion cobalt nanoparticle composite material. By activating peroxymonosulfate, efficient degradation of antibiotics in wastewater can be realized. The material is simple in preparation method and excellent in catalytic performance, can degrade antibiotics in wastewater under a wide pH condition, and shows relatively high stability and circularity. The invention provides a green and low-cost method for preparing the heterogeneous peroxymonosulfate advanced oxidation catalyst, and the catalyst can be widely used for removing antibiotics and has very high application value.

The invention discloses a through type and differential pressure combined dual-redundancy pressure sensor and a preparation method thereof, the sensor comprises a differential pressure type pressure-sensitive chip and a through type pressure-sensitive chip which are sequentially stacked from bottom to top, and a bonding layer is arranged between the differential pressure type pressure-sensitive chip and the through type pressure-sensitive chip. The preparation method comprises the following steps: preparing the differential pressure type pressure-sensitive chip and the through type pressure-sensitive chip, and respectively bonding the differential pressure type pressure-sensitive chip and the through type pressure-sensitive chip with the bonding layer to form a sandwich structure to finish preparation. The sensor can realize dual-redundancy measurement of a single pressure point under the cooperative use of the through-type pressure-sensitive chip and the differential pressure-type pressure-sensitive chip, has the advantages of high sensitivity, quick response, good stability and the like, is a novel pressure sensor with excellent performance and convenience in use, and can reduce the number and the size of the pressure sensor by the preparation method, so that the production cost is reduced. The method has the advantages of being simple in process, convenient to operate, low in cost, high in yield and the like, is suitable for large-scale preparation, and facilitates industrial application.

The application relates to a wood-based special material constructed by curled fibers and a preparation method and application thereof, and belongs to the technical field of aerogel materials. The application aims to solve the problems of large brittleness, poor thermal-mechanical stability and single function of existing ceramic aerogels in extreme environments. The wood-based special material constructed by curled fibers is composed of a three-component network of silicon carbide nanoparticles, carbon nanotubes and cellulose nanosheets; the cellulose nanosheets form a micro-coil structure, the silicon carbide nanoparticles are loaded on the surface of the cellulose nanosheets, the carbon nanotubes are interwoven between the cellulose nanosheets and the silicon carbide nanoparticles, and the three components jointly construct a three-dimensional network with a cross-scale hierarchical porous structure. The application relates to the application of the wood-based special material constructed by curled fibers in aerospace thermal protection, electromagnetic shielding, heat insulation, flame-retardant materials or deep space exploration equipment. The application does not need supercritical drying or high-temperature sintering, has low energy consumption and is suitable for large-scale preparation.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a compound clobetasol propionate derivative and a preparation method thereof. The compound clobetasol propionate derivative has a structure as shown in a general formula (I). The clobetasol propionate derivative is prepared by carrying out esterification reaction on 11-site hydroxyl of clobetasol propionate and acid, the reaction condition is simple, the yield is higher, the clobetasol propionate derivative is easy to separate and purify, and the fat solubility of the clobetasol propionate subjected to structure optimization is improved. The invention provides possibility for subsequent activity test, and provides a novel method for structural modification of the compound. Hectogram-level preparation can be conveniently realized in a laboratory, and the method is suitable for large-scale production. # imgabs0 #

The invention discloses an adamantyl phosphine ligand with a cinchona alkali framework, a silver catalyst containing the ligand and application, the ligand has a structure as shown in a formula (I) or a tautomer, an enantiomer and a diastereoisomer of the ligand: # imgabs0 #, in the formula (I), R1 is ethyl or vinyl; and a substituent R2 is a methoxy group or a hydrogen atom. The novel catalyst composed of the adamantyl phosphine ligand with the cinchona alkali skeleton and the silver salt can efficiently catalyze the asymmetric [3 + 2] cycloaddition reaction of aromatic aldehyde and isocyano acetate, and the corresponding chiral oxazoline intermediate is obtained with high stereoselectivity and high yield; the technology can be applied to asymmetric synthesis of florfenicol intermediates and chloramphenicol intermediates, has the advantages of short synthesis route, high yield, good stereoselectivity and the like, and has good economic and social benefits.

This invention discloses a lithium mica granule insulating brick and its preparation method. The lithium mica granule insulating brick is made from the following raw materials by weight percentage: 40%–80% lithium mica granules and 20%–60% cement. The lithium mica granules are prepared from lithium mica through granulation, calcination, and leaching. In this invention, the lithium mica granules have characteristics such as low density, high porosity, low thermal conductivity, and high strength. When compounded with cement, they form a lithium mica granule insulating brick that is lightweight, has high compressive strength, and excellent thermal insulation performance. The lithium mica granules used can be used directly without the need for pretreatment such as grinding and drying. The preparation process is simpler, more convenient, and has lower energy consumption, making it suitable for large-scale production and facilitating the industrial application of lithium mica granule insulating bricks. Furthermore, the large quantity of lithium mica granules used enables large-scale resource utilization of lithium mica and effectively solves the environmental problems associated with lithium mica granules.

The invention discloses a composite sensing electrode and a preparation method and application thereof. The electrode comprises a basic electrode, an Al / Co-MOFs / rGO layer and a bifunctional monomer molecularly imprinted polymer film, wherein the Al / Co-MOFs / rGO layer and the bifunctional monomer molecularly imprinted polymer film cover the surface of the basic electrode. The preparation method comprises the following steps: preparing an Al / Co-MOFs / rGO suspension liquid, dripping the suspension liquid on the surface of an electrode, drying the electrode, placing the electrode in a solution containing o-phenylenediamine, dopamine and template molecules, carrying out an electropolymerization reaction, and demolding to obtain the electrode. The composite sensing electrode provided by the invention has the advantages of multiple binding sites, uniform dispersion, good conductivity, good structural stability, strong specific recognition capability and the like, can realize rapid and accurate detection of perfluorinated and polyfluoroalkyl substances, can effectively reduce false positive records existing in the detection process, and can be widely applied to detection of perfluorinated and polyfluoroalkyl substances. The method has the advantages of short detection period, high detection sensitivity, high accuracy and the like, and is high in use value and good in application prospect in the fields of environment monitoring, food safety, water quality condition diagnosis and the like.

The present invention discloses a birnessite / fulvic acid composite adsorbent and a preparation method and application thereof. The preparation method comprises: respectively mixing potassium permanganate and sodium salt with water to form a mixed solution, mixing manganese chloride and fulvic acid with water to form a mixed solution, mixing the two mixed solutions, stirring, and obtaining the birnessite / fulvic acid composite adsorbent. The composite adsorbent prepared by the present invention has the advantages of large specific surface area, multiple adsorption sites, large adsorption capacity, good stability, and green environmental protection. It is a new heavy metal ion adsorbent with low cost and excellent performance, which can be widely used for adsorbing heavy metal ions in water bodies, has good adsorption effect and high adsorption efficiency, has high use value and good application prospects, and has very important practical significance for realizing the effective treatment of heavy metal polluted wastewater. The preparation method of the present invention also has the advantages of simple process, controllable process, continuous production, etc., is suitable for large-scale preparation, and is convenient for industrial application.

The invention discloses a preparation method of a lignin rosin sizing agent, the method comprising the following steps: dissolving lignin and rosin in anhydrous ethanol, stirring and drying to obtain a lignin rosin sizing agent powder, that is, obtaining a lignin rosin sizing agent; wherein the mass ratio of rosin to lignin is 1:0.25-4. The method of the invention pioneered the exploration of the synergistic hydrophobic effect of green renewable lignin and rosin, and applied it to the field of liquid packaging paperboard. The method of the invention solves the problems of complex preparation process and low paper strength of the existing rosin sizing agent.

The invention discloses a bicyclo [2.1. 1] hexene compound and preparation and application thereof.The bicyclo [2.1. 1] hexene compound is obtained by taking bicyclo [1.1. 1] butanone and phosphate as starting raw materials and taking a tetrahydrofuran solution of potassium tert-butoxide as alkali through reflux and reaction at the temperature of 80 DEG C. The prepared compound has certain transpeptidase inhibitory activity, and can be used as a novel compound for inhibiting transpeptidase. The infection and diffusion of the staphylococcus aureus can be effectively inhibited.

The invention belongs to the technical field of waste resources, provides a mine filling material and a preparation method thereof, and solves the problem of large-area accumulation of red mud. The product comprises the following raw materials in parts by mass: 100-130 parts of red mud, 20-30 parts of acidic wastewater, 10-15 parts of cement, 20-40 parts of building waste, 2-5 parts of cellulose ether, 1-3 parts of sodium silicate, 20-25 parts of modified straw and 70-80 parts of water. Red mud is used as a main material, acidic wastewater is adopted for excitation, and the strength of the filling material is improved. The building waste is used as the aggregate, so that the mechanical property of the filling material can be improved while the cost is reduced, and the waste material is fully utilized. The cellulose ether added in the filling material can improve the initial fluidity of the filling material, and is convenient for the material to fully fill a target space. By using sodium silicate, the anti-scouring property and durability of the filling material can be improved, so that the compressive strength of the material is improved.

The invention discloses a preparation method and application of surface glue starch with a three-dimensional interpenetrating interlayer structure, and the preparation method is characterized by comprising the following steps: step 1, weighing sodium bentonite, calcium bentonite and kaolin, putting into a conical flask, adding distilled water, sealing, carrying out ultrasonic treatment, and naming as Na-BX, Ca-BX and Kao-X; and 2, adding corn starch into the solution obtained in the step 1, preparing a starch slurry, stirring in a constant-temperature water bath kettle, transferring alpha-amylase, adding into the starch slurry, stirring in the constant-temperature water bath kettle, heating while stirring, and preserving heat to obtain the surface sizing starch. According to the method, no chemical product is added in the preparation process, the safety is guaranteed, meanwhile, the environment-friendly concept of greenness, low carbon and sustainability is considered, and the sizing performance of the prepared surface sizing starch is better than that of original starch.

The invention provides a solvent-free zinc powder amorphous alloy anticorrosive paint and a preparation method thereof.The solvent-free zinc powder amorphous alloy anticorrosive paint is composed of a component A and a component B. The component A is prepared from, by mass, 30-35 parts of epoxy resin, 4-9 parts of reactive diluent, 18-25 parts of zinc powder and 9-15 parts of micron sheet amorphous alloy. 4-9 parts of pigment and filler, and 2-3 parts of an auxiliary agent; and the component B is prepared from the following raw materials in parts by mass: 14-19 parts of a curing agent and 1-2 parts of an adhesion promoter. The solvent-free zinc powder amorphous alloy anticorrosive paint provided by the invention has better salt spray resistance, adhesive force, hardness and wear resistance, avoids the use of a large amount of organic solvents, and is simple in preparation process, green and environment-friendly in production and construction and suitable for large-scale popularization and application.

The invention discloses a lignin-based chemical crosslinking polyvinyl alcohol composite membrane and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method provided by the invention comprises the following steps: dissolving lignin and succinic anhydride in a solvent, and reacting in the presence of a catalyst to obtain a succinic anhydride esterified lignin solution; and adding polyvinyl alcohol into the succinic anhydride esterified lignin solution, reacting, and drying to form a film. The preparation method is simple, low in cost and suitable for large-scale preparation; the obtained lignin-based chemically-crosslinked polyvinyl alcohol composite film can still keep the elongation at break of 200% or above in a high-humidity environment with the RH of 90%, has good rebound resilience after being soaked, has the rebound rate of 90% or above and even as high as 100%, is suitable for a working environment which is in a high-humidity environment for a long time and has a high strain requirement on materials, and has good degradation performance at the same time.

This invention belongs to the field of chemical production technology, specifically disclosing a method for preparing high-purity silica, comprising the following steps: S1, grinding: crushing and grinding minerals or waste containing silica or silicates; S2, leaching: mixing with a leaching agent in a certain proportion to carry out a leaching reaction, followed by solid-liquid separation to obtain a fluoride ion complex solution containing fluorosilicic acid; S3, extraction: separating fluorosilicic acid from fluoride ion complex impurities using an extraction method to obtain a high-purity fluorosilicic acid or fluorosilicate solution; S4, pH adjustment: performing a metathesis reaction by adjusting the pH, followed by solid-liquid separation to obtain solid silica and soluble fluorides; S5, obtaining high-purity silica. This invention, employing the above-mentioned method for preparing high-purity silica, is applicable to most silicon-containing raw materials, effectively reducing the impurity content in silicon slag, and preparing high-purity silica with a purity of up to 99.99%.