238 results about "Sodium Hypophosphite Monohydrate" patented technology

The invention discloses a wear-resistant vehicle body film and a preparation method thereof, and relates to the technical field of films. The wear-resistant automobile body film prepared by the invention is prepared from polytetrahydrofuran ether glycol, isophorone diisocyanate, a catalyst, dihydric alcohol quaternary ammonium salt, a functional aid, modified silicon dioxide and a chain extender. The dihydric alcohol quaternary ammonium salt is obtained by reacting N, N '-dihexyl-N, N'-dimethyl propane-1, 3-diamine with monochloroacetone and then condensing with glycerol; the functional additive is obtained by reacting 2-boric acid thiophene-4-methyl acetate with 2, 7-dibromofluorene and then carrying out bromination hydrolysis; the modified silicon dioxide is obtained by reacting pretreated silicon dioxide with melamine and then reacting with sodium hypophosphite. The wear-resistant vehicle body film prepared by the invention has good anti-aging, wear-resistant, antibacterial and flame-retardant properties.

The invention relates to the technical field of polyester, in particular to a flame-retardant and antibacterial dual-function fiber and a preparation method thereof. The flame-retardant antibacterial fiber overcomes the defects that existing fibers are poor in flame retardance and antibacterial property. According to the invention, PET resin, a composite modified auxiliary agent master batch and a composite flexibilizer are used as raw materials, and the bifunctional fiber is prepared through melting and spinning; wherein the composite modified additive master batch is prepared from the following raw materials: PET (Polyethylene Terephthalate) resin, aluminum diethylphosphinate, modified halloysite nanotubes, modified zinc oxide nanowires and zinc borate; the modified halloysite nanotube is prepared from the following raw materials: a halloysite nanotube, KH560 and phosphoric acid; the modified zinc oxide nanowire is prepared from the following raw materials: zinc nitrate hexahydrate, hexamethylenetetramine and sodium hypophosphite. By controlling the dosage of each component and processing technological parameters, the finally prepared difunctional fiber has good flame retardance and good antibacterial property, and is suitable for manufacturing curtains.

The invention discloses an indoor flame-retardant insulated flexible wire and a preparation method thereof, belongs to the technical field of flexible wires, and is used for solving the technical problem that the insulating property and flame-retardant property of an indoor flexible wire in the prior art need to be further improved. The cable comprises a wire layer formed by twisting a plurality of copper wires, an insulating layer and an outer sheath layer, a modified aminating agent taking a siloxane chain segment as a main body is prepared, polyvinyl chloride is aminated and hybridized with a space chain segment of the polyvinyl chloride at the same time, after phosphorus-hydrogen addition and surface modification, the hybridized polyvinyl chloride is obtained, and through sodium hypophosphite and 1, 2, 4-trimethyl-1, 3-pentanediol, the flame retardant is added to the polyvinyl chloride, so that the cable is formed. The preparation method comprises the following steps: carrying out phosphorus-hydrogen addition on 2, 3-dihydroxystyrene to obtain a modified cross-linking agent, forming a spherical structure by the modified cross-linking agent and phosphonitrilic chloride trimer under triethylamine and ultrasonic conditions, carrying out surface modification to obtain flame-retardant microspheres, and carrying out melt extrusion on the modified cross-linking agent and phosphonitrilic chloride trimer as main materials and auxiliary materials of an outer sheath layer to finally prepare the flame-retardant insulated flexible wire.

The invention discloses a preparation method of a chemical composite plating solution based on nano niobium carbide. The preparation method comprises the following steps: step 1, pretreating niobium carbide (NbC) powder; step 2, preparing a chemical plating solution, wherein every 1L of the chemical plating solution contains 30g of nickel chloride, 20g of sodium hypophosphite, 10g of sodium citrate, 5g of glycine, 10g of sodium acetate, 0.3 g of sodium dodecyl benzene sulfonate and 80mg of zinc molybdate; fixing the volume to 1L by using distilled water; 3, measuring the niobium carbide suspension liquid, mixing the niobium carbide suspension liquid with the chemical plating solution, and fixing the volume, so that the content of niobium carbide in the chemical composite plating solution is 0.01-0.3 g / L; adjusting the pH value of the solution to 5.8; according to the method, niobium carbide nanoparticles are added into the chemical composite plating solution, so that the surface of a plated part and metal gold are combined with the particles, and the hardness and wear resistance of a base material are effectively improved; the effect on a 60-80-micron nickel-phosphorus coating in the industry is achieved through the ultrathin chemical composite coating (8-10 microns), so that the corrosion resistance and the wear resistance of the product are enhanced.

The invention relates to the technical field of tire rubber manufacturing, and discloses a tread rubber composition containing modified lignin and a mixing method thereof, and the rubber composition is added with the modified lignin. The modified lignin is water-soluble lignin obtained by modifying lignin by grafting citric acid groups. Citric acid is adopted to modify lignin, a citric acid group is grafted on a lignin group under the catalytic action of sodium hypophosphite to enhance the hydrophilicity of the lignin group, wet mixing is combined, the dispersity of the lignin in rubber is effectively improved, the rolling resistance of the rubber composition is reduced, meanwhile, the added lignin can enhance the strength of a rubber network, and the rolling resistance of the rubber composition is reduced. The tensile property of the rubber is improved.

The invention discloses a salt-spray-corrosion-resistant stainless steel rod and a preparation method thereof, and belongs to the technical field of salt-spray-corrosion-resistant stainless steel. The salt-spray-corrosion-resistant stainless steel rod comprises a stainless steel rod body and a corrosion-resistant layer attached to the outer surface of the stainless steel rod body. The method comprises the following steps: sequentially polishing, deoiling, activating and cleaning a stainless steel rod, then putting the stainless steel rod into a chemical composite plating solution for chemical composite plating, then putting the stainless steel rod into a nitric acid solution for chemical etching, introducing hydrogen and hydrocarbon gas in a high-temperature atmosphere, and then continuously heating and introducing composite hydrogen to obtain the salt-spray-corrosion-resistant stainless steel rod, wherein the chemical composite plating solution comprises the following components: 30-40 g / L of nickel sulfate, 15-35 g / L of sodium hypophosphite, 4-6 g / L of citric acid, 32-36 g / L of boric acid, 16-20 g / L of sodium acetate, 0.03-0.05 g / L of carbon black and 20-35 g / L of tungsten carbide particles; the salt-spray-corrosion-resistant stainless steel rod prepared by the invention is relatively good in corrosion resistance, wear resistance and toughness.

The invention relates to the technical field of catalyst processing, and discloses a high-activity transition metal phosphide electrolyzed water catalyst and a preparation method thereof, and the high-activity transition metal phosphide electrolyzed water catalyst comprises the following components by weight: 1-3 parts of cobalt chloride hexahydrate; 0.5 to 1.5 parts of ruthenium trichloride; 0.5 to 1.5 parts of iridium chloride (III) hydrate; 1-2 parts of copper sulfate pentahydrate; 2 to 4 parts of sodium hypophosphite; 1 to 2 parts of urea; 1 to 2 parts of glucose; 1-2 parts of sodium sulfide nonahydrate; 0.5 to 1 part of crystalline aluminum chloride; 50 to 100 parts of deionized water; and 0.1 to 0.5 part of hexadecyl trimethyl ammonium bromide. By introducing the plasma auxiliary treatment technology, the electronic structure of the catalyst is optimized, the conductivity and stability of the catalyst are improved, and the efficiency and durability of hydrogen production through water electrolysis are enhanced.

The invention provides a treatment process of a byproduct sodium hypophosphite in a phosphorane preparation process, and aims to efficiently remove impurities and prepare a high-purity hypophosphorous acid product. The process comprises the following steps: carrying out small-volume sampling on reaction mother liquor, introducing carbon dioxide gas, and drawing an acidification curve of pH and conductivity; according to the plateau phase of an acidification curve, the CO2 flow rate and the pH value are controlled, step-by-step selective precipitation of impurities such as PO4 < 3->, HPO4 < 2->, Fe < 3 + >, AsO4 < 3-> and S < 2-> is achieved, and loss of a target component H2PO4 < 2-> is avoided; calcium hydroxide turbid liquid is introduced at a proper time to supplement Ca < 2 + > and promote efficient removal of phosphorus, arsenic and sulfur impurities; and subsequently removing excessive Na < + > and Ca < 2 + > through cation exchange, and concentrating to obtain a hypophosphorous acid product with the purity of more than or equal to 99.5%. The method is accurate in process control, thorough in impurity removal and good in repeatability and industrial adaptability, and the resource utilization efficiency of by-products and the added value of products are remarkably improved.

The invention belongs to the technical field of synthetic ester, and particularly relates to a preparation method of fatty acid pentaerythritol ester base oil, which comprises the following steps: carrying out esterification reaction on pentaerythritol and fatty acid in the presence of a catalyst and a color retention agent, and carrying out post-treatment to obtain the fatty acid pentaerythritol ester base oil, the catalyst comprises at least one of stannous octoate, stannous oxalate, stannous oxide, tetrabutyl titanate, isopropyl titanate and sodium hydrogen sulfate; the color retention agent comprises at least one of sodium hypophosphite, hypophosphorous acid, activated carbon and sodium sulfite. The color retention agent sodium hypophosphite is matched with the specific catalyst such as stannous oxalate, so that the petroleum color number of the produced fatty acid pentaerythritol ester base oil is smaller, and meanwhile, the esterification reaction time is shorter.

The invention relates to the technical field of corrosion prevention of oil field pipes, and particularly discloses electroplating liquid for a high-tungsten-content hydrogen sulfide corrosion resistant sleeve coating and a preparation process of the electroplating liquid. The invention discloses electroplating liquid for a high-tungsten-content hydrogen sulfide corrosion-resistant sleeve coating. The electroplating liquid comprises the following raw materials: 60-90 parts of a composite tungsten source; 40-70 parts of a nickel-cobalt main salt; 35-55 parts of a composite complexing agent; 1-5 parts of carboxylated graphene quantum dots; 1 to 5 parts of an aminated ZIF-8 derived carbon nanocage; 1-5 parts of a rare earth stabilizer; 1-4 parts of sodium hypophosphite; 1-4 parts of sodium citrate; 1-3 parts of a surfactant; 15 to 25 parts of a buffering agent; and 350 to 450 parts of deionized water. According to the single-layer electroplated layer, the interface stress of the multi-layer structure can be eliminated, so that other interface problems such as plating layer cracking caused by underground temperature fluctuation are avoided, it is guaranteed that the thickness of the plating layer reaches the standard, and then it is guaranteed that the plating layer has excellent corrosion resistance.

The invention provides a post-added nanocellulose enhancing auxiliary agent for latex paint coating and a preparation method and a use method thereof, and the preparation method comprises the following steps: mixing, stirring and heating butanetetracarboxylic acid, sodium hypophosphite and a nanocellulose solution to obtain an esterified nanocellulose solution; adding a silane coupling agent solution into the esterified nanocellulose solution to obtain a modified nanocellulose solution; dispersing nano silicon dioxide into absolute ethyl alcohol to obtain silicon dioxide dispersion liquid; adding a silane coupling agent solution into the silicon dioxide dispersion liquid, mixing, stirring and heating for reaction to obtain modified silicon dioxide powder; dispersing the modified silicon dioxide powder into absolute ethyl alcohol to obtain modified silicon dioxide dispersion liquid; adding the compound emulsifier solution into the modified silicon dioxide dispersion liquid, and shearing and emulsifying to obtain modified silicon dioxide emulsion; and adding a compatilizer into the modified nano cellulose solution, dropwise adding the modified silicon dioxide emulsion, and finally adjusting the viscosity.

The invention discloses a preparation method of a phosphate radical intercalation NiCoFe-LDH catalyst and application of the phosphate radical intercalation NiCoFe-LDH catalyst in hydrogen production through water electrolysis, and belongs to the technical field of hydrogen production through electrolysis. The method comprises the following steps: carrying out electrochemical adsorption and electrochemical oxidation treatment on a NiCoFe-LDH material in a phosphating solution, so as to obtain the phosphate radical intercalation NiCoFe-LDH catalyst. The phosphating solution is a sodium hypophosphite monohydrate solution. According to the preparation method, phosphate radicals are successfully introduced between LDH material layers in a manner of taking the phosphate radicals as a precursor for the first time and an electrochemical oxidation manner, so that the phosphate radical intercalation nickel-cobalt-iron-based hydrotalcite with a nanosheet structure is prepared; the material is stable in structure and low in overpotential in the water electrolysis hydrogen production process, stable operation can be conducted for 400 h when the current density is 400 mA. Cm <-2 >, and the potential retention rate reaches 95% or above; the preparation method is simple, the used reagents are low in cost and rich in source, and the catalyst is suitable for macroscopic preparation and has popularization and application prospects.

The invention belongs to the technical field of aluminum hypophosphite preparation, and particularly relates to a method for targeted optimization of the particle size of an aluminum hypophosphite flame retardant by using a crystal modifier, and the method comprises the following steps: S1, adding sodium hypophosphite into deionized water, and dissolving to prepare a 1.5 mol / L sodium hypophosphite solution; s2, aluminum sulfate octadecahydrate is added into deionized water to be dissolved, and a 0.3 mol / L aluminum sulfate solution is prepared; and S3, mixing the sodium hypophosphite solution and the aluminum sulfate solution, then adding an aqueous solution of an acid regulator, controlling the pH value of the solution through the acid regulator, then adding a crystal modifier, oscillating and uniformly mixing, then putting into a drying oven for reaction, and after the reaction is finished, centrifuging and washing to obtain an aluminum hypophosphite product.

The invention relates to an enzyme-mimic CeO2-based multi-active-site catalyst, a preparation method and application thereof, an electrolytic tank and a battery. CeO2 nanorods are synthesized through hydrothermal and high-temperature pyrolysis methods, and then metal ions are anchored to the surfaces of the CeO2 nanorods through strong interaction of carriers; metal nanoclusters and nanoparticles with specific sizes are synthesized, and then chemical vapor deposition reaction is performed through sodium hypophosphite, so that the bionic nano-enzyme electrocatalyst with multiple active sites is obtained. The multi-active-site catalytic material provided by the invention has high selectivity of ammonia production from nitrate radicals, ammonia production efficiency and Faraday efficiency when being used as a cathode. When the RuO2 is used as an anode, in an alkaline water electrolysis reaction, when the current density is 50 mA / cm < 2 >, the overpotential is 288 mV, which is far better than that of commercial RuO2. Based on excellent oxidation and reduction performance, the zinc nitrate battery has high power density, high ammonia yield and good charge-discharge cycle stability, and nitrate removal, ammonia production and power supply can be achieved at the same time.

The invention provides a copper-containing plating solution and a method for plating copper on the surface of graphene, and belongs to the technical field of chemical plating. The copper-containing plating solution provided by the invention comprises copper sulfate pentahydrate, hypophosphite, glyoxylic acid, ethylenediamine tetraacetic acid tetrasodium salt, sodium citrate and deionized water. The glyoxylic acid in the copper-containing plating solution can quickly provide electrons in the initial reaction stage, so that copper ions are quickly nucleated; hypophosphite can continuously reduce copper ions in the plating solution into copper atoms, and continuous growth of a copper layer is achieved; tetrasodium ethylene diamine tetraacetate and copper ions can form a complex with high stability, and the copper ions are slowly released; sodium citrate is used as an auxiliary complexing agent, so that the discharge potential can be adjusted, and the deposition process of copper ions is further optimized, so that compact coating of a to-be-plated copper matrix is realized, and the copper plating effect is effectively improved. Results of the embodiment show that the copper-containing plating solution provided by the invention can form a compactly coated copper layer on the surface of graphene.

The invention discloses a preparation method of plant-based polyester fibers, and relates to the technical field of high polymer materials. When the plant-based polyester fiber is prepared, firstly, phosphorus-modified dopamine is synthesized by taking dopamine hydrochloride and sodium hypophosphite as raw materials; carrying out copolymerization on the phosphorus-modified dopamine, terephthalic acid, ricinoleic acid and 1, 3-propylene glycol to prepare modified plant-based polyester; the preparation method comprises the following steps: synthesizing 2-bornyl-4, 6-dichloro-1, 3, 5-triazine from aminated carbon nanotubes, further synthesizing 2-bornyl-4, 6-dichloro-1, 3, 5-triazine from L-borneol and 2, 4, 6-trichloro-1, 3, 5-triazine, reacting the 2-bornyl-4, 6-dichloro-1, 3, 5-triazine with the aminated carbon nanotubes, and modifying with allylamine to obtain modified carbon nanotubes; finally, the modified plant-based polyester, the modified carbon nanotubes and auxiliaries are subjected to blending extrusion, melt spinning and treatment through copper nitrate and ascorbic acid, and the plant-based polyester fiber is prepared. The plant-based polyester fiber prepared by the invention has excellent antibacterial property, flame retardant property and mechanical property.

The application belongs to the technical field of nylon industrial yarn, and particularly relates to a nylon industrial yarn for airbag and a preparation method thereof. The preparation method of the nylon industrial yarn is as follows: taking nylon 66 salt and benzotriazole-phosphate derivative as raw materials, under the action of sodium hypophosphite, polycondensation is carried out to obtain modified nylon 66 chip, and then the nylon industrial yarn is prepared through melt spinning; the nylon industrial yarn is prepared by one-step direct polymerization, which can effectively avoid the problem of the decline of the comprehensive performance of the finished product nylon 66 caused by the flame-retardant modification, and the preparation process is simple and convenient for production; the prepared nylon industrial yarn has good strength, aging resistance and flame retardance, and has great market application value in the field of automobile airbag.

The application discloses a P and O co-doped FeNiRuOx nano catalyst and a preparation method and application thereof, relates to the technical field of electrocatalytic materials, and the catalyst takes Fe, Ni and Ru as metal active centers, reconstructs a surface electronic structure through P and O double anion co-doping, and forms a polygonal nano structure, wherein the mass fraction ranges of Fe, Ni, Ru and P are 5.0-6.0%, 75-78%, 11-12% and 6.5-7.0% respectively. The preparation method comprises the following steps: taking iron acetylacetone, nickel acetylacetone and ruthenium chloride trihydrate as metal sources, synthesizing a precursor through a solvothermal reaction, and realizing P and O co-doping through a sodium hypophosphite assisted solid-phase phosphorization process, and the preparation process is mild. The synthesized catalyst has unique structural advantages, the formed polygonal nano structure has a large specific surface area and rich grain boundary defects, more active sites are exposed, and convenient channels are provided for the mass transfer of reactants and products. The synergistic effect among the polymetals further enhances the catalytic performance.

The application prepares an NP co-doped graphite nanosheet electrocatalyst, and has the advantages of simple and efficient preparation method, easy operation, low cost and practical application significance. The application takes cheap graphite powder as raw material, takes melamine and sodium hypophosphite as nitrogen source and phosphorus source respectively, and prepares the NP co-doped graphite nanosheet in a tube furnace through a high-temperature gas phase method. The NP co-doped graphite nanosheet is activated by electrochemistry to generate adjacent quinone structures with basic OER activity and further oxidize P-containing functional groups to obtain more phosphoric acid functional groups with HER activity, and the NP co-doped graphite nanosheet exhibits excellent electrocatalytic performance. The overpotential of the basic OER is only 314 mV, and the overpotential of the acidic HER is only-69.4 mV.

The invention relates to a multifunctional coated cotton fabric and a preparation method thereof, and belongs to the technical field of functional fabrics. The preparation method comprises the following steps: S1, dissolving pentaerythritol phytate, citric acid and sodium hypophosphite in water to obtain pentaerythritol phytate finishing liquid; carrying out rolling and baking treatment on the cotton fabric by adopting the pentaerythritol phytate finishing liquid to obtain a primarily finished cotton fabric; s2, dissolving chitosan, citric acid and sodium hypophosphite in water to obtain a chitosan finishing solution; carrying out rolling and baking treatment on the primarily finished cotton fabric by adopting chitosan finishing liquid to obtain a secondarily finished cotton fabric; and S3, repeating the operations of S1 to S2 for several times to obtain the multifunctional coated cotton fabric. Phosphate radicals of pentaerythritol phytate serve as an acid source, amino groups of chitosan serve as an air source, sugar rings of chitosan, a polyol structure of pentaerythritol phytate and a carboxyl structure of citric acid serve as carbon sources, and the flame retardant property of the coated cotton fabric is remarkably improved through an intumescent flame retardant mechanism.

The invention relates to an N-FeP / IF-coated Au material and a preparation method and application thereof.The preparation method comprises the steps that foam iron IF is placed in surface treatment liquid to be subjected to surface treatment, and foam iron subjected to surface treatment is obtained; the method comprises the following steps: putting foam iron which is cut into round sheets and is subjected to surface treatment into a porcelain boat, putting the porcelain boat into a tubular furnace filled with protective gas, putting a porcelain boat filled with sodium hypophosphite in the tubular furnace according to the ventilation direction of the protective gas and the ventilation upstream direction, heating the tubular furnace to enable the foam iron to be subjected to phosphating reaction, and then cleaning and drying a product, so as to obtain a phosphating product. The foam iron loaded with iron phosphide is obtained and marked as FeP / IF; under the mixed atmosphere of ammonia gas and inert gas, nitrogen doping is conducted on FeP / IF, and foam iron loaded with nitrogen-doped iron phosphide is obtained and marked as N-FeP / IF; in a magnetron sputtering vacuum bin, gold is used as a target material, N-FeP / IF is used as a substrate, gold deposition is carried out on the substrate, and nitrogen-doped iron phosphide foam iron with gold deposition is obtained and is recorded as N-FeP / IF at Au.

The application discloses a kind of synthesis methods of high-purity electronic grade sodium hypophosphite, dilute phosphine gas is passed into to the mixed solution of sodium hypochlorite and sodium hydroxide that has been pre-cooled with sufficient stirring, and sodium hydroxide is added to carry out reaction;After reaction is completed, filtration, concentration, crystallization, separation are carried out, and the obtained product is purified by resin to obtain high-purity electronic grade sodium hypophosphite product.Compared with the traditional "yellow phosphorus-lime-soda" oxidation-reduction method for preparing industrial grade product and then preparing high-purity electronic grade sodium hypophosphite, the product purification difficulty of the application is low, by using 7N grade ultra-high purity phosphine without any metal impurities, the problem that arsenic, silicon, germanium, nickel, chromium and other metal impurities cannot be completely removed by traditional process can be effectively solved.In addition, the application also has the advantages of effectively solving the problem of three wastes, high recycling rate of by-products, high economy and the like.

The invention discloses a phosphorus-doped composite photo-anode catalyst for regulating and controlling a Co3O4 / Fe2O3 electronic structure as well as a preparation method and application of the phosphorus-doped composite photo-anode catalyst, and belongs to the technical field of hydrogen production by photoelectrochemical decomposition of water. The preparation method comprises the following steps that a Fe2O3 photo-anode is immersed in a ZIF-67 precursor solution, ZIF-67 is deposited in situ, and then a Co3O4 / Fe2O3 p-n heterojunction is obtained through calcination; and finally, carrying out annealing treatment by taking sodium hypophosphite as a phosphorus source in an inert atmosphere to realize phosphorus doping of Co3O4. According to the invention, the Co3O4 / Fe2O3 p-n heterojunction photoanode derived from ZIF-67 is prepared, and the electronic structure of Co3O4 is further modulated through P doping. Wherein an embedded electric field generated by the Co3O4 / Fe2O3 p-n heterojunction effectively promotes the rapid transfer of interface charges; p doping further adjusts the electronic structure of Co3O4, so that the energy barrier of the oxygen evolution reaction (OER) rate determination step is reduced, and the OER kinetics is accelerated; the synergistic effect of p-n heterojunction and electronic structure modulation significantly improves the water oxidation activity of Fe2O3.

The invention discloses a nickel pre-plating additive suitable for a high area and an electroplating method. The invention discloses a cleaning agent, which comprises the following five main functional additives: 10-20 wt% of a surfactant, 10-20 wt% of a brightening agent, 4-8 wt% of a leveling agent, 10-15 wt% of a softening agent, 8-12 wt% of a surface cleaning agent, 1-3 wt% of a wetting agent and the balance of five main functional additives. Wherein the brightener mainly comprises one or a mixture of more of pyridinium propyl sulfobetaine (PPS), a sodium allysulfonate aqueous solution (ALS), trichloroacetaldehyde hydrate (TCA), 1, 4-butynediol (BOZ), pyridinium hydroxy propyl sulfobetaine (PPS-OH) and butynediol ethyl oxide (BEO). The leveling machine mainly comprises one or a mixture of more of pyridinium sulfobetaine (PPS), propargyl alcohol ethyl oxide (PME), propargyl alcohol propoxy compound (PAP), butynediol propoxy compound (BMP), N, N-diethyl propargyl amine formate (PABS) and pyridinium hydroxy propyl sulfobetaine (PPS-OH). The softening agent mainly comprises one or a mixture of more of a sodium allysulfonate aqueous solution (ALS), sodium allysulfonate (SAS), N, N-diethyl propynylamine (DEP) and propinyl-3-sulfopropyl ether sodium salt (POPS). The surface cleaning agent mainly comprises one or a mixture of more of sodium gluconate, sodium benzoate, sodium salicylate, sodium acetate, sodium hypophosphite and 2, 5-dimethyl-3-hexyne-2, 5-diol (HD-M). The wetting agent mainly comprises one or a mixture of more of 2-ethylhexyl sodium sulfate (TC-EHS), sodium dihexyl sulfosuccinate and sodium mono (2-ethylhexyl) sulfate. The corresponding substances are classified according to the characteristics of the additive, and the dispersing capacity of the plating solution is remarkably enhanced by utilizing mutual synergism and combined action of different substances and matching with the formula of the Watt plating solution. Meanwhile, matching is carried out according to the characteristics of the nickel pre-plated steel strip, and the nickel pre-plated steel strip has the advantages of being suitable for a high-current-density interval, adjustable in coating glossiness, good in coating ductility, good in compactness, few in pinhole, few in blue point and the like.

The invention discloses a material for electrocatalytic SOR assisted electrolysis of seawater for hydrogen production and a preparation method and system thereof, and belongs to the field of electrocatalytic hydrogen evolution, the method comprises the following steps: S1, dissolving Ni (NO3) 2.6 H2O, Co (NO3) 2.6 H2O, CO (NH2) 2 and NH4F in deionized water, and carrying out ultrasonic treatment until powder is completely dissolved; s2, transferring the obtained solution and foamed nickel into a high-pressure reaction kettle, and putting the high-pressure reaction kettle into a drying oven for heating reaction; s3, after the solution is naturally cooled, the obtained electrode is washed with deionized water and then placed in a vacuum oven to be dried, and the obtained electrode is recorded as CoNi / NF; s4, placing the prepared CoNi / NF and sodium hypophosphite on different side surfaces in a porcelain crucible; then, putting the porcelain crucible into a tubular furnace, enabling one side containing the sodium hypophosphite to face an argon inlet of the tubular furnace, heating the tubular furnace from room temperature to 350 DEG C in an argon atmosphere, and preserving heat; the material CoNiP / NF for hydrogen production through seawater electrolysis assisted by electro-catalysis SOR is obtained, and the problems of low catalytic activity, poor stability and toxic sulfide recovery in the prior art are solved.

The present invention provides an iron phosphide negative electrode material and a preparation method thereof and a lithium battery, relating to the technical field of lithium ion batteries. Specifically, the preparation method comprises the following steps: (1) mixing an iron source, a nitrogen source and a solvent, and preparing a nano-sized N-FeP2 precursor by a solvent thermal reaction; (2) subjecting the N-FeP2 precursor and sodium hypophosphite to a gas-cured phosphating reaction to prepare nano-sized N-FeP2; (3) drying a solution containing a carbon source and the N-FeP2, heating the dried product in a protective gas atmosphere for pre-carbonization and carbonization reaction, and cooling to obtain the iron phosphide negative electrode material N-C@FeP2. The method of the present invention improves the volume expansion and fragmentation of the material through material nano-sizing, nitrogen doping and surface carbon coating, reduces resistance, and effectively improves the electrochemical performance of the product.

The invention provides a fully degradable nanocellulose composite liquid mulching film and a preparation method thereof, and the preparation method comprises the following steps: adding hexadecyl trimethoxysilane into a nanocellulose solution, mixing and heating to obtain a hydrophobically modified cellulose solution; adding citric acid and sodium hypophosphite into the starch solution, mixing and heating for esterification reaction to obtain an esterification product, and adding deionized water after the esterification product is cooled to room temperature to obtain a product solution; mixing and stirring a gelatin solution and a dopamine solution to obtain a modified gelatin solution modified by polydopamine; mixing the modified gelatin solution with the product solution to obtain composite gel; mixing, shearing and emulsifying the modified cellulose solution, the composite gel, an emulsifier, a plasticizer and a water-retaining agent to obtain a composite emulsion; alkali liquor is dropped into the composite emulsion to adjust the pH value, then a cross-linking agent is added, and the composite liquid mulching film is obtained after mixing and heating.

This application relates to the technical field of cement mortar admixtures, and specifically discloses an early-strength and shrinkage-reducing polycarboxylate water reducer and a preparation method thereof. An early-strength and shrinkage-reducing polycarboxylate water reducer includes a base material, Material A, and Material B. The base material includes water, methallyl polyoxyethylene ether, 2-acrylamide-2-methylpropanesulfonic acid, sodium hypophosphite, and an initiator; Material A includes water, sodium formaldehyde sulfoxylate, and a regulator; Material B includes water, acrylic acid, and a shrinkage-reducing monomer. The regulator is obtained by esterifying maleic anhydride and mercaptoethanol in a molar ratio of 1:(1-1.05) to obtain an esterification product, and diluting the esterification product; the preparation method is as follows: S1. Weighing; S2. Reacting. The early-strength and shrinkage-reducing polycarboxylate water reducer of this application can be used as an admixture for cement mortar, ensuring the strength of the cement mortar while improving the shrinkage problem of the cement mortar.

The invention discloses high molecular weight polyacrylamide with a multi-branched chain structure, which is prepared from the following components in parts by weight: 90 to 120 parts of acrylamide, 20 to 25 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 to 8 parts of urea, 0.01 part of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 0.02 part of pentaerythritol triacrylate, 0.03 to 0.035 part of sodium hypophosphite, 0.015 to 0.018 part of initiator V-50 and 0.055 part of redox initiator. And 375 to 380 parts of deionized water. The invention also provides a preparation method of the high molecular weight polyacrylamide. Polyacrylamide has a controllable branched structure, pentaerythritol triacrylate and sodium hypophosphite are combined, the branching process is regulated and controlled through a chain transfer reaction, a branching point is efficiently introduced, meanwhile, gel generated by excessive crosslinking is accurately avoided, all components in the formula have a synergistic effect, urea promotes dissolution, EDTA-2Na eliminates metal ion interference, and the performance of the adhesive is improved. The polymerization condition is mild, and the product performance batch stability is high.