55 results about "Sodium tartrate" patented technology

The invention discloses an environment-friendly electrolyte for anodic oxidation of titanium and titanium alloy workpieces and an electrolytic coloring method. The electrolyte comprises 8-12 parts of lactic acid, 5-10 parts of sodium tartrate, 2-5 parts of sodium bicarbonate and the balance of deionized water. The electrolytic coloring method comprises the steps of pretreatment, anodic oxidation coloring and aftertreatment. The pretreatment comprises alkali washing oil removal, water washing and laser treatment; and an electrolyte mixed by 8-12 parts of lactic acid, 5-10 parts of sodium tartrate, 2-5 parts of sodium bicarbonate and the balance of deionized water is used for anodic oxidation coloring. The post-treatment comprises sealing treatment and drying. According to the technical scheme, the technical problems that the anodic oxidation coloring technology is completely free of fluorine, low in toxicity and safe to operate, and the oxidation waste liquid is free of pollution and easy to treat can be solved, existing pretreatment steps can be simplified, and meanwhile uniform coloring is achieved.

The invention provides a secondary battery and an electronic device, the secondary battery comprises a positive pole piece and a negative pole piece, the positive pole piece comprises a positive pole material layer, the positive pole material layer comprises a positive pole active material, and the positive pole active material comprises a manganese-containing material; the manganese-containing material comprises at least one of lithium manganate, lithium iron manganese phosphate, a lithium-rich manganese-based material or nickel cobalt lithium manganate. The negative pole piece comprises a first additive, the first additive comprises at least one of carboxylate, sulfonate or a metal organic framework compound, carboxylate comprises at least one of lithium oxalate, sodium citrate, sodium maleate or sodium tartrate, sulfonate comprises at least one of sodium benzenesulfonate, sodium dodecyl benzene sulfonate or sodium methanesulfonate, and metal organic framework compound comprises at least one of lithium oxalate, sodium citrate, sodium maleate or sodium tartrate. The metal organic framework compound is prepared from at least one of Zn (C4H7N2) 2, C48H28O32Zr6 or C14H16N2O8Mg2. The invention further discloses a preparation method of the metal organic framework compound. The secondary battery meets the characteristics, and the cycle performance of the secondary battery can be improved.

The invention relates to the technical field of aluminum alloys, in particular to a high-strength wear-resistant aluminum alloy material and a preparation process thereof. Aluminum alloy raw materials are subjected to smelting, casting, high-temperature heat preservation, extrusion forming and stretching forming, and the aluminum alloy plate is obtained. And the surface of the aluminum alloy plate is subjected to thermal diffusion treatment, and the high-strength aluminum alloy plate is obtained. And then modified chitosan, paraffin, a vanillin solution, a sodium tartrate solution and the like are added to prepare the microcapsule corrosion inhibitor. The preparation method comprises the following steps: mixing isophorone diisocyanate, hydroxypropyl polydimethylsiloxane, a microcapsule corrosion inhibitor and dibutyltin dilaurate to obtain an organic silicon modified polyurethane resin prepolymer, and adding various assistants to obtain the high-performance coating. And the surface of the high-strength aluminum alloy plate is coated with the high-performance coating, and a finished product is obtained after drying.

The invention belongs to the technical field of hydrogen production electrolytic cells, and particularly relates to a preparation method of an electrode for a hydrogen production electrolytic cell, and the preparation method at least comprises the following steps: providing a base material; forming a first catalyst layer on the substrate; and forming a second catalyst layer on the first catalyst layer, when the second catalyst layer is formed, a stabilizer is added into the electrochemical liquid medicine, and the stabilizer comprises one or a combination of more of sodium citrate, potassium citrate, sodium gluconate, disodium ethylene diamine tetraacetate and sodium tartrate. By means of the preparation method of the electrode for the hydrogen production electrolytic cell, the stability of the catalyst on the base material can be improved, exertion of the activity of the catalyst is not affected, then the performance of the water electrolysis hydrogen production electrode is improved, the preparation cost can be reduced, and the preparation process can be simplified.

The present invention discloses an organic salt capable of inhibiting side reactions such as dendrites and corrosion as an aqueous zinc ion battery electrolyte, wherein the aqueous zinc ion battery electrolyte comprises a zinc salt, deionized water and an organic salt additive; the zinc salt is zinc sulfate; and the organic salt additive is sodium tartrate or sodium citrate. The organic salt additive provided by the present invention can be adsorbed on the surface of zinc in the electrolyte, improve the interface environment between the zinc negative electrode and the electrolyte, and destroy the original solvation shell of the zinc ion, thereby inhibiting the occurrence of side reactions such as dendrites and corrosion, and ultimately extending the service life of the aqueous zinc ion battery and improving the cycle stability. In addition, the additive provided by the present invention has a wide range of sources and low cost, and the preparation method is green and environmentally friendly.

The present invention belongs to the field of pharmaceutical preparations, and particularly relates to a butorphanol tartrate injection and a preparation method thereof. Each milliliter of the butorphanol tartrate injection comprises: 2 mg of butorphanol tartrate, 0.18 - 2.2 mg of tartaric acid, 2.9 - 3.32 mg of sodium tartrate, 0.01 - 0.5 mg of antioxidant, 6.4 mg of sodium chloride and water for injection, and the pH is 3.0 - 5.0. The butorphanol tartrate injection prepared by the present invention solves the influence of light on the product quality through the synergistic effect of tartaric acid and a specific antioxidant, has good light stability, and at the same time avoids the influence of the leaching of metal ions in the brown glass bottle on the product quality during long-term storage of the product, significantly improves the stability of the product, and thus ensures the effectiveness and safety of the product.

The present invention belongs to the technical field of scale and corrosion inhibition treatment for industrial circulating cooling water, and relates to a phosphorus-free composite scale and corrosion inhibitor for circulating water, its preparation method, and application. The composite scale and corrosion inhibitor comprises the following components by weight: 26-33% disodium cocoamphodipropionate, 8-10% sodium tartrate, 1-2% sodium thioglycolate, 0.1-0.2% concentrated hydrochloric acid, and 54.8-64.9% deionized water. The composite scale and corrosion inhibitor provided by the present invention not only has high scale inhibition performance, but also exhibits excellent corrosion inhibition performance in various circulating cooling water systems, exhibits broad-spectrum stability, and its key components are highly efficient and environmentally friendly, making it particularly suitable for use in industrial circulating cooling water systems.

This invention proposes a sperm staining kit based on a sequential staining strategy of tail pre-staining – rapid differentiation – enhanced nuclear staining. A gentle fixation with 4% paraformaldehyde and acetate buffer preserves the complete nucleic acid of the sperm head and the protein structure of the tail. The addition of PVP K30 and Tween-20 effectively inhibits non-specific adsorption and reduces staining background interference. Brilliant Green SF combined with sodium tartrate is used for specific staining of the sperm tail, followed by rapid differentiation to wash away non-specific staining. Nuclear staining is performed using toluidine blue O combined with sodium chloride and sodium tetraborate hydrate, specifically binding to DNA and enhancing color development stability, resulting in a blue sperm head and a light green tail with clear color contrast. This invention produces a clean staining background, accurately distinguishing the morphology of the sperm head, acrosome, and tail, significantly improving the accuracy of microscopic identification of abnormal sperm such as large-headed, small-headed, curled-tailed, broken-tailed, and short-tailed sperm. It is suitable for detecting sperm morphology and abnormality rates in breeding males.

A process for producing a nitrogen-doped peony-shaped molybdenum oxide, comprising the following steps: (1) adding a regulator to a molybdenum-containing solution for reacting, concentrating and thermally treating to obtain a peony-shaped molybdenum oxide; and (2) dissolving the peony-shaped molybdenum oxide in a conditioning agent and adding an amine source for standing, centrifuging, washing, and heat-treating, thereby obtaining the nitrogen-doped peony-shaped molybdenum oxide; wherein the regulator is at least one of the following: nitric acid, ammonium nitrate, sodium persulfate, ammonium persulfate, concentrated sulfuric acid, H2O2, ozone, sodium hypochlorite, wherein in step (2), the conditioning agent is at least one of the following: sodium acetate, ammonium acetate, sodium formate, diaminoethane, sodium oxalate, ammonium benzoate, sodium phenylacetate, sodium propionate, sodium tartrate, sodium citrate, ammonium citrate; and wherein in step (2) the amine source is at least one of the following: aniline, dimethylamine, trimethylamine, benzylamine, phenethylamine, ethylamine, diethylamine, propylamine, phenylenediamine, xylylenediamine, amphetamine.

The application belongs to the technical field of pharmaceutical preparations, and particularly relates to an indocyanine green preparation and a preparation method and application thereof. The preparation is a liquid preparation or a freeze-dried preparation, raw materials for preparing the preparation include indocyanine green, phospholipid, cholesterol, a freeze-drying protective agent, water and a pH regulator, the pH regulator is selected from one or more of sodium citrate, potassium citrate, sodium tartrate, sodium acetate, sodium lactate and sodium succinate, and the pH of the preparation is adjusted to 6.0-8.5. By means of a specific organic acid salt buffer system and a specific preparation process (the freeze-drying protective agent is added before lipid film deposition), the application can specifically inhibit the growth of impurities with RRT 0.7 and RRT 0.3, respectively, and significantly improve the chemical stability of the preparation. Meanwhile, the preparation can realize accurate positioning of sentinel lymph nodes and second and third lymph nodes, and can be used for preparing a lymph tracer. The application effectively solves the technical problems of rapid impurity growth, poor stability and inaccurate multi-stage lymph positioning of the existing ICG preparation.

The present application proposes an electrolyte plasma polishing liquid for magnesium alloy and a polishing method thereof. The polishing liquid comprises: 20-30 g / L potassium sulfate; 5-10 g / L hydrogen fluoride ammonia; 10-20 g / L dodecylbenzene sulfonic acid; 5-10 g / L Tween 20; 15-30 g / L potassium sodium tartrate, 5-15 g / L aminoacetic acid, and the solvent is water. After sodium tartrate and aminoacetic acid are compounded, potassium sodium tartrate can form a stable complex with magnesium metal, and aminoacetic acid can effectively control the complexation speed. The surfactants Tween 20 and dodecylbenzene sulfonic acid are compounded, both of which are acidic, which is conducive to the production of a mixed gas layer. The molecules of the two surfactants are easily electrostatically adsorbed / repelled through chemical bonds to produce a synergistic effect, which effectively improves the gloss and flatness of the magnesium alloy metal surface. The polishing process is carried out at two different voltages. The low voltage avoids oxidation from occurring too quickly to form rough spots, which is conducive to the formation of a stable gas layer.

The invention relates to the field of electrocatalyst catalytic energy conversion, and particularly discloses an oxygen-vacancy-enriched chromium ion doped nickel phosphate nanoflower as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving nickel nitrate hexahydrate, chromic nitrate nonahydrate, urea, sodium tartrate and polyethylene glycol into water, and then carrying out heating reaction; s2, mixing the chromium ion doped nickel hydroxide nanoflowers prepared in the step S1 with sodium hypophosphite, uniformly dispersing the mixture in water, and then performing freeze drying and sealed calcination; and S3, carrying out plasma reaction on the chromium ion doped nickel phosphate nanoflower prepared in the step S2 under the condition of introducing inert discharge gas to obtain the oxygen vacancy-enriched chromium ion doped nickel phosphate nanoflower. The oxygen-vacancy-rich chromium ion doped nickel phosphate nanoflower has relatively high conductivity and surface activity, and can reduce overpotential, promote the kinetic process of water decomposition reaction, reduce energy loss and improve the efficiency of hydrogen production by electrolysis of water.

The invention relates to the technical field of batteries, in particular to a battery monomer, a preparation method of a secondary battery, an electrolyte and an electric device. Each single battery comprises a positive pole piece, a negative pole piece and an electrolyte, at least partial structures of the positive pole piece and the negative pole piece are located in the electrolyte, the electrolyte comprises a metal ion complexing agent, and the metal ion complexing agent comprises an organic complexing agent and / or an inorganic complexing agent; the organic complexing agent comprises at least one of phenanthroline, a crown ether compound, oxalic acid, citric acid, tartaric acid, ethylenediamine tetraacetic acid and deferoxamine; and / or the inorganic complexing agent comprises at least one of sodium oxalate, sodium citrate, sodium tartrate and sodium ethylene diamine tetracetate. The metal ion complexing agent in the electrolyte can be combined with impurity metal ions in the electrolyte to form a stable complex, so that the risk that the impurity metal ions are separated out into dendritic metal foreign matters at an anode to pierce a diaphragm to cause self-discharge of the battery is reduced.

The invention discloses a detection pretreatment method for an amide herbicide in an environmental water body, and belongs to the technical field of pesticide residue analys.The method comprises the steps that the environmental water body containing the amide herbicide is centrifuged, and supernate is obtained; adding sodium tartrate and ascorbic acid into the supernate, and carrying out vortex mixing to obtain a mixed solution; the pH value of the mixed solution is measured, and if the pH value is not in the range of 6.5-7.5, the pH value of the mixed solution is adjusted to 6.5-7.5; filtering the mixed solution with the pH value of 6.5-7.5 to obtain a filtrate; cooling the filtrate to 60 DEG C below zero to 80 DEG C below zero, and pre-freezing; freeze-drying the pre-frozen filtrate, wherein the vacuum degree is kept to be less than or equal to 10Pa in the freeze-drying process; dissolving the freeze-dried sample by using acetonitrile or normal hexane, and standing; filtering the sample after standing for the second time for subsequent detection; according to the pretreatment method, the recovery rate of the sample is improved, and the variable coefficient of a test result is reduced.

The application discloses a phosphorus-free scale and corrosion inhibitor easy to be biodegraded and a preparation method thereof, and belongs to the technical field of water treatment. The phosphorus-free scale and corrosion inhibitor comprises the following components in parts by weight: 360-400 parts of water, 30-40 parts of modified polyepoxysuccinic acid, 20-30 parts of a composite adsorption corrosion inhibitor, 20-25 parts of hydrolyzed polymaleic anhydride, 8-15 parts of sodium gluconate, 4-6 parts of alanine, 2-5 parts of sodium alginate and 1-3 parts of sodium carboxymethyl cellulose. The composite adsorption corrosion inhibitor is formed by a complex of plant polyphenol and hydroxypropyl-beta-cyclodextrin, and then is reacted with sodium tartrate, sodium citrate and polyaspartic acid to obtain the composite adsorption corrosion inhibitor. The modified polyepoxysuccinic acid is obtained by modifying epoxysuccinic acid with urea, N-hydroxymaleimide and citraconimide. The phosphorus-free scale and corrosion inhibitor prepared by the application is easy to be biodegraded and has good scale and corrosion inhibition performance.

The invention relates to the technical field of fine chemical engineering, in particular to a method for green production of D-tartaric acid by a double-compartment bipolar membrane process, which comprises the following steps: preparing a raw material sodium tartrate solution generated by hydrolysis of a sodium epoxysuccinate solution through a strain into a raw material solution with the mass concentration of 7-8.5%, and carrying out electrodialysis on the raw material solution through a double-compartment bipolar membrane electrodialysis device to obtain D-tartaric acid. Directional ion migration is realized under the action of direct current; sodium ions enter an alkali side through a positive membrane and are combined with hydroxyl ions generated by dissociation of a bipolar membrane to generate a sodium hydroxide solution with the mass concentration of 3-4%; hydrogen ions enter an acid side through the bipolar membrane and are combined with tartrate ions to generate a D-tartaric acid solution, and a D-tartaric acid finished product is obtained through subsequent concentration and drying; through the mode, one-step conversion from sodium tartrate to D-tartaric acid is realized, the cost is reduced, and the yield is improved.

This invention relates to the field of functional textile materials technology, specifically disclosing a nonwoven fabric with both flame-retardant and anti-aging properties and its preparation method. A functional filler is filled into the porous structure of the nonwoven fabric; the functional filler is a magnesium-aluminum double hydroxide with a flower-like structure, and its surface is loaded with nanoparticles of tin-doped cerium dioxide. A high specific surface area magnesium-aluminum double hydroxide is prepared by a hydrothermal method using urea and sodium tartrate in synergistic regulation; further, tin-doped cerium dioxide nanoparticles are grown in situ on its surface by a hydrothermal method, forming a unique "flower-particle" composite structure. The layered magnesium-aluminum double hydroxide exhibits excellent flame-retardant and smoke-suppressing effects, while the tin-doped cerium dioxide efficiently absorbs ultraviolet light, significantly improving anti-aging properties. The synergy of these two components endows the nonwoven fabric with excellent and long-lasting flame-retardant and UV-aging-resistant properties, making it suitable for high-end applications such as special protection, outdoor sunshade, and construction.

The invention discloses a composite cleaning agent for a screw of an injection molding machine as well as a preparation method and application of the composite cleaning agent, and relates to the field of cleaning agents. The water-based adhesive comprises the following components: 15-25% of azodicarbonamide, 8-12% of a water-soluble azo initiator, 8-12% of a fluorinated surfactant, 3-7% of triethanolamine oleate, 3-7% of diphenylmethane diisocyanate, 12-18% of sodium tartrate, 12-18% of sodium carbonate and the balance of alkaline ionized water. According to the composite injection molding machine screw cleaning agent and the preparation method and application thereof, stubborn residues such as pigment and carbon black can be rapidly removed through multiple synergistic effects, and the cleaning time can be shortened to 5-20 minutes; the consumption of resin for cleaning is greatly reduced, and tests show that the resin cleaning cost can be saved by up to 85% and the time cost can be saved by 80%.

The invention relates to the technical field of food processing, in particular to functional storage-resistant lightly-milled milled rice with embryo and a production method of the functional storage-resistant lightly-milled milled rice with embryo. The polishing agent comprises milled rice with embryo and a polishing solution. The method comprises the following steps: pretreating brown rice to obtain lightly ground milled rice with embryo; chitosan, maltodextrin, spring dextrin, citric acid, lysozyme, sodium tartrate, table salt, propolis and ascorbic acid are weighed and mixed to form an aqueous solution, and a polishing solution is obtained; coating and polishing the lightly-ground milled rice with embryo by using a polishing solution, cooling to room temperature, and packaging and storing. According to the method, the milled rice with embryo is coated and polished by using the polishing solution, so that functional components contained in the milled rice with embryo can be preserved, the shelf life of the product is prolonged to 10-24 months, the operation is convenient, the equipment is simple, the cost is low, the loss of nutritional components of the milled rice with embryo is less, the taste is good, and the product is clean, safe, pollution-free and free of side effects on a human body in the production process.

The present invention discloses an acidic degreasing agent and a preparation method thereof, relating to the technical field of PCB electroplating. The acidic degreasing agent of the present invention comprises the following components in percentage by weight: 4-6% of organic acid; 1-2% of inorganic acid; 0.5-1% of penetrant; 0.5-1% of copper ion polymerization inhibitor; 0.2-0.7% of adsorption and desorption agent; the balance is water; the organic acid is at least one of sulfamic acid and citric acid; the copper ion polymerization inhibitor is at least one of sodium tartrate, sodium gluconate and succinic acid. The acidic degreasing agent of the present invention can effectively remove the dust and grease marks on the copper surface, and while ensuring the cleaning effect of the copper surface, it can effectively slow down the etching of the copper surface, does not form a copper surface composite film, and has no influence on subsequent electroplating. At the same time, it can also well solve the problem of step gradient occurring in pattern electroplating, so that the flatness, adhesion and corrosion resistance of the electroplated layer are not easily affected.

The embodiment of the invention discloses a carbon felt electrode loaded with a copper sulfide / graphdiyne composite catalyst as well as a preparation method and application of the carbon felt electrode. The method comprises the following steps: preparing an electroplating solution containing copper sulfate, sodium citrate, sodium tartrate and lauryl sodium sulfate: electroplating in the electroplating solution by taking a pre-oxidized carbon felt as a cathode and a copper sheet as an anode; washing with deionized water to be neutral, and drying to obtain a copper modified carbon felt material; preparing a diethyl ether solution containing a hexaacetylene benzene monomer, and then adding pyridine; soaking the modified carbon felt material in the diethyl ether solution, washing and drying to obtain a copper modified carbon felt material on which graphdiyne grows; preparing a thiourea-containing ethylene glycol solution, soaking the copper modified carbon felt material on which graphdiyne grows in the ethylene glycol solution, and carrying out heat preservation at a preset temperature for a preset time; and washing and drying to obtain the required carbon felt electrode. The limitation of a traditional carbon felt electrode in the aspects of catalytic activity, conductivity and stability is effectively overcome, and the comprehensive performance of the electrode is improved.

The invention discloses a raw material of the calibration product, which includes a buffer, a chelating agent, a surfactant, a stabilizer and a preservative, wherein the chelating agent is any one or more of diethylenetriamine pentaacetic acid pentasodium, hydroxyethylethylenediaminetriacetic acid trisodium salt, sodium tartrate and calcium citrate. The calibration product of the invention has good stability, can be stored for a long time, does not have the matrix effect of the calibration product prepared by EDTA and the IMA reagent that has been on the market during calibration, and the detection result is more accurate, and has broad application prospects and huge market value.

The invention discloses an alkali polishing additive for silicon wafers. The alkali polishing additive comprises organic amine, a complexing dispersant, inorganic salt and a surfactant. The organic amine is one or more of dichloroaniline, diethanol amine and dimethylamine, and the organic amine is 1-5 parts. The complexing dispersant is one or more of sodium benzoate, sodium alginate and sodium citrate, and the complexing dispersant is 3-8 parts. The inorganic salt is one or more of sodium sulfate, lauryl sodium sulfate, sodium pyrosulfate and sodium tartrate, and the inorganic salt is 1-5 parts. The surfactant is one or more of dodecyl dimethyl betaine, sodium alkyl naphthalene sulfonate and alkyl glycoside, and the amount of the surfactant is 5-8 parts; the additive also comprises deionized water; according to the silicon wafer alkali polishing additive, the organic amine is added, the back polishing effect of the same tower footing is obtained under the condition of low weight loss, the battery efficiency is improved, meanwhile, the additive synthesis device can stir and dissolve all the raw materials evenly, and the alkali polishing additive is obtained.

The present invention relates to a powder mixture for the preparation of a granulate comprising as constituent at least a filler or at least an active ingredient or both and as granulation aid potassium sodium tartrate tetrahydrate (PST). Optionally constituents of the powder mixture to be granulated are binders, disintegrants and further customary auxiliaries. It was an object of the present invention to provide a powder mixture which can be granulated without adding a liquid but where the water for the granulation is released in-situ from PST. An additional drying step is not required.

The processing method of the diamond powder comprises the following steps: cleaning the diamond powder; carrying out surface sensitization treatment and activation treatment on the diamond powder; the diamond powder is subjected to chemical electroplating, and a nickel layer is plated on the surface of the diamond powder; wherein electroplating liquid in chemical electroplating comprises nickel sulfate, sodium hypophosphite, sodium tartrate, ammonium chloride and ammonium bifluoride. According to the method, damaged diamond powder can be repaired, burrs on the surface of the diamond powder are passivated, scratches are repaired, and therefore the use efficiency of the diamond powder is improved, and the service life of the diamond powder is prolonged.

The invention provides nicotinazinyl aniline salt compound powder and a preparation method thereof, and is characterized in that the nicotinazinyl aniline salt compound powder comprises the following components in parts by weight: 50-80 parts of nicotinazinyl aniline salt compound microspheres, 3.8-6.0 parts of L-tartaric acid, 4-5 parts of sodium tartrate, 0.2-1 part of decyl glucoside, 0.2-1 part of sodium citrate, 0.2-1 part of ascorbic acid, 1-3 parts of ammonium sulfate and 1-3 parts of sodium chloride; the nicotinoyl aniline salt composite microspheres are prepared by a method comprising the following steps: S1, weighing tea saponin powder, sodium isethionate and deionized water, mixing, and uniformly mixing under an ultrasonic condition to form a first mixed solution; s2, weighing metacrylic acid ester, N, N-methylene bisacrylamide, polyethylene glycol, dibenzoyl peroxide and toluene, mixing in a beaker, and stirring uniformly to form a second mixed solution; s3, weighing nicotinoyl aniline salt, mixing the nicotinoyl aniline salt with deionized water, and uniformly stirring to form a nicotinoyl aniline salt solution; and S4, heating the first mixed solution to 45-50 DEG C, dropwise adding the second mixed solution under a stirring condition, carrying out a stirring reaction for 0.5 h, dropwise adding the nicotinoyl aniline salt solution, continuously carrying out heat preservation for 1-2 h, and carrying out pressure reduction to remove the solvent so as to obtain the nicotinoyl aniline salt / polyacrylate / tea saponin microspheres, namely the nicotinoyl aniline salt composite microspheres.

The invention belongs to the technical field of electrolytic copper foil preparation, and discloses a low-chromium washing-free anti-oxidation liquid for an electrolytic copper foil, a preparation method of the low-chromium washing-free anti-oxidation liquid and a washing-free anti-oxidation process. The anti-oxidation liquid comprises the following components: chromium sulfate, ammonium molybdate, gamma-aminopropyltriethoxysilane, phytic acid, nano silicon dioxide, sodium tartrate, citric acid, a pH value regulator and water. According to the invention, the synergistic ratio of chromium sulfate, ammonium molybdate and gamma-aminopropyltriethoxysilane is limited, and nano silicon dioxide is introduced to enhance the compactness of the film layer, so that the chromium content is remarkably reduced, and meanwhile, efficient anti-oxidation protection under a washing-free condition is realized. The matched stepped hot air drying process further avoids the problem of copper foil warping caused by traditional high-temperature drying, and a more environment-friendly and more reliable surface treatment solution is provided for the electrolytic copper foil for the lithium ion battery.

The invention discloses a preparation method of a powdery nano-composite thermoelectric material, which comprises the following steps: (1) putting graphene oxide into deionized water according to a ratio, and carrying out ultrasonic treatment until liquid is in a uniform and transparent state; (2) sequentially adding sodium tartrate, TeO2, KOH and Bi (NO3) 3.5 H2O into the uniform and transparent liquid; (3) adding KBH4 into the solution obtained in the step (2), and then carrying out stirring reaction; (4) transferring the stirred solution obtained in the step (3) into a hydrothermal reaction kettle; (5) after the hydrothermal reaction kettle is naturally cooled to room temperature, taking out a product in the hydrothermal reaction kettle, and washing the product with deionized water until supernate is neutral; then washing the product with absolute ethyl alcohol at least twice; (6) a mixture of the product obtained in the step (5) and absolute ethyl alcohol is put into a centrifugal tube, then the centrifugal tube is put into a high-speed centrifugal machine to be centrifuged, and (7) the centrifuged product is subjected to vacuum drying, and the powdery nano-composite thermoelectric material is obtained after drying is completed. The invention provides a preparation method of a powdery nano composite thermoelectric material, which has the advantages of simple steps, convenience in operation and low cost, and can obtain a thermoelectric material with stable performance and high efficiency.

The invention discloses a method for preparing high-conductivity and high-strength copper-plated carbon fiber: 1) ablation, cleaning and drying of polyacrylonitrile-based carbon fiber to obtain surface-oxidized carbon fiber; 2) copper sulfate, sodium citrate, sodium tartrate, sodium dodecyl sulfate and water are mixed to prepare electroplating solution; 3) the surface-oxidized carbon fiber is used as a cathode and a copper sheet is used as an anode, electroplating is performed in the electroplating solution, and the surface is cleaned to neutrality with deionized water, and dried in a vacuum oven to obtain copper-plated carbon fiber; 4) the copper-plated carbon fiber is annealed and cooled under nitrogen protection. The invention performs surface ablation and oxidation treatment on the carbon fiber, so that the surface of the carbon fiber has a suitable roughness, improves the interface bonding force between the coating and the carbon fiber, and the annealing treatment solves the problems of poor coating quality, many defects and easy peeling when copper is used. After annealing, the coating is dense and uniform, the resistivity and porosity are reduced, the stress concentration points are reduced, and the mechanical properties are improved.

The invention discloses a preparation method of petal-shaped ferromagnetic metal particles, which is characterized in that growing magnetic metal particles generate anisotropy based on an external magnetic field, and anisotropic petal-shaped ferromagnetic metal particles are prepared by a hydrothermal synthesis method. Weighing cobalt chloride hexahydrate and sodium tartrate, and adding deionized water for dissolving; adding a hydrazine hydrate solution with the concentration of more than 80wt%, and uniformly stirring; dropwise adding a sodium hydroxide solution in a stirring state; putting the prepared solution into a reaction kettle, and adding magnetons; then, raising the temperature of the reaction kettle to 100-200 DEG C, reacting for 4-16 hours, and cooling to room temperature; centrifugally separating and drying to obtain a product. The magnetocrystalline anisotropy of the magnetic metal particles is utilized to break through the Snoek constant, high-frequency microwave absorption is achieved, and the performance requirements of high-frequency application materials can be met.