3303 results about "Phosphate" patented technology

The invention relates to the technical field of intelligent control, in particular to a monopotassium phosphate intelligent control method and system.The method comprises the following steps that rhizosphere phosphorus and potassium concentration changes are obtained, whether the rhizosphere phosphorus and potassium concentration changes are in a critical rate interval or not is judged, an effective absorption time period identifier is generated, and an organ amplification ratio is analyzed to judge a cooperation period; and extracting a stalk concentration ratio, comparing the stalk concentration ratio with a reference interval to generate an application inhibition identifier, fusing information to judge a fertilization window, adjusting the concentration according to the root hair amplification and the water consumption rate, and generating a control instruction set. According to the method, the effective time period of phosphorus and potassium nutrient absorption of the crops is determined through crop rhizosphere phosphorus and potassium ion concentration difference calculation and average treatment, the objective interval of crop nutrient absorption rate indexes is defined, blind fertilization is avoided, the pertinence and accuracy of nutrient absorption and utilization of the crops are enhanced, the excessive application state of nutrient elements is dynamically identified, and the crop quality is improved. The risk of excessive nutrients caused by nutrient enrichment of crops is prevented, and resource waste and environmental burden are effectively reduced.

The invention relates to a modified chrome corundum ramming material and a preparation and construction process thereof, and belongs to the technical field of chrome corundum ramming materials. The ramming material comprises a material A, a material B and a material C, wherein the material A comprises chrome corundum aggregate, titanium dioxide coated aluminum oxide microspheres, calcium sulfide dehydrate and silicon carbide porous microspheres; the material B comprises chromium oxide-zirconium oxide composite nano powder, sodium thiosulfate pentahydrate, tricalcium phosphate and hexagonal boron nitride flaky crystals; and the material C comprises an aluminum dihydrogen phosphate-magnesium hydroxide compound, a calcium fluoride-aluminum oxide co-melt and a silane coupling agent. The preparation process comprises the steps of pretreatment of all the components, preparation of composite powder and layered preparation. The construction process comprises the steps of pretreatment, wet-process mixing, layered ramming, negative-pressure permeation, medium-temperature reaction, spraying curing, integral firing and the like. Generation of hexavalent chromium can be effectively inhibited, the thermal shock resistance, the mechanical strength and the heat-conducting property of the material are remarkably improved, and the material has the advantages of being good in environment friendliness, long in service life, excellent in construction performance and the like.

The invention discloses a potassium fulvate chelated macroelement water-soluble fertilizer with stress resistance and growth promotion functions, and relates to the technical field of water-soluble fertilizers, the potassium fulvate chelated macroelement water-soluble fertilizer comprises the following raw materials by weight: 167-210 parts of mineral source potassium fulvate, 450-460 parts of potassium nitrate, 300-310 parts of urea, 150-160 parts of potassium dihydrogen phosphate, 30-40 parts of potassium sulfate, 15-25 parts of EDTA-disodium, and 5-15 parts of citric acid. 0.5 to 1.5 parts of brassinolide and 4 to 6 parts of polyaspartic acid; according to the potassium fulvate chelated macroelement water-soluble fertilizer with the stress-resistant and growth-promoting functions, through chelation cooperation of potassium fulvate and nitrogen, phosphorus and potassium, the solubility of the chelated phosphorus element in water is increased, and the chelated phosphorus element can be more uniformly distributed in soil; by adopting an EDTA-disodium and citric acid composite chelating system, volatilization and loss of nitrogen elements are reduced, the problem of precipitation of calcium, magnesium and phosphorus is solved, and the soil conditioner is suitable for hard water areas and especially has outstanding performance in saline-alkali soil and arid areas.

The invention discloses a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. The flame-retardant ABS composition provided by the invention comprises the following components in parts by mass: 50-80 parts of ABS resin; 8 to 12 parts of styrene-acrylonitrile copolymer; 3 to 5 parts of styrene-acrylonitrile-maleic anhydride terpolymer; 2 to 6 parts of a fluorine-containing maleimide copolymer; 5 to 15 parts of graphite nanosheet modified high rubber powder; 12 to 18 parts of brominated flame retardant; 3-7 parts of a phosphorus-based flame retardant; 0.1-1 part of a processing aid; the phosphorus-based flame retardant is prepared from the following components in parts by mass: 80 to 95 parts of diethyl phosphinate; 0.3 to 3 parts of ethyl butyl phosphinate; 0.1 to 2 parts of ethyl phosphonate; and 5 to 20 parts of melamine polyphosphate. The flame-retardant ABS composition prepared by the invention is good in flame retardant property, good in welding strength and low in cost.

The invention discloses a method for preparing a carbon monoxide oxidation catalyst by using red mud and tungsten-molybdenum smelting slag, which comprises the following steps of: uniformly stirring and mixing the red mud and the tungsten-molybdenum smelting slag at a high speed, mixing with inorganic strong acid, and performing ultrasonic-assisted stirring to obtain acid leaching slag; the acid leaching residues are subjected to low-temperature plasma activating treatment and then microwave activating treatment, and microwave activated plasma residues are obtained; weighing tricalcium phosphate and microwave activated plasma slag, and uniformly stirring to obtain phosphorus-calcium doped activated slag; weighing an ammonium sulfide solution and the phosphorus-calcium doped activated slag, uniformly stirring, transferring the obtained sulfur-phosphorus-calcium doped activated slag into a hydrothermal reaction kettle, carrying out hydrothermal reaction, carrying out compression molding on the obtained hydrothermal composite material, and carrying out pyrolysis carbonization treatment in an inert gas atmosphere to obtain the phosphorus-calcium doped activated slag. The obtained pyrolysis composite material is soaked with a silane coupling agent solution and then roasted again, and the carbon monoxide oxidation catalyst is obtained. The catalyst prepared by the invention can realize efficient oxidation photocatalysis of carbon monoxide under the conditions of normal temperature and normal pressure.

The invention discloses a comb-type polyphosphate polymeric dispersant and a preparation method thereof, the dispersant is prepared by preparing a phosphate monomer from acrylate and phosphorus pentoxide, then copolymerizing the phosphate monomer with phenyl alkene or alkyl alkene, and finally adding alkali liquor for neutralization. A phosphate-polyether bifunctional side chain is introduced to a main chain, a phosphate group provides electrostatic repulsion, and a polyether group enhances steric hindrance, so that the dispersing agent can meet the requirements of strong adsorption and long-range stability at the same time, and a more durable and effective stabilizing effect is provided for a dispersion system.

The invention belongs to the technical field of electrode foil formation treatment, and particularly relates to an electrode foil and a preparation method thereof and an aluminum electrolytic capacitor, the preparation method of the electrode foil comprises the steps of performing multi-stage formation treatment on a corrosion foil, the number of stages of the formation treatment is at least two, and the formation treatment at least comprises first-stage formation and second-stage formation, first heat treatment is carried out after the second-stage formation; a formation liquid used in the second-stage formation is a mixed solution containing adipate and monopotassium phosphate. According to the preparation method provided by the invention, the formation liquid used in secondary formation is the mixed solution containing adipate and monopotassium phosphate, the limitation of traditional single formation liquid is broken through, and synchronous optimization of the structure, hydration resistance and electrochemical performance of the aluminum oxide film is realized through multi-stage formation, mixed solution synergy and the synergistic effect of formation and heat treatment; meanwhile, production cost is reduced, and environmental load is relieved.

The invention discloses application of iron ruthenium nano-enzyme in preparation of nucleic acid detection products, and belongs to the technical field of biological detection and nano-materials. The RIN has stable peroxidase-like (POD) activity, and can catalyze a chromogenic reaction between 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) and hydrogen peroxide (H2O2). The catalytic activity of the nano-enzyme can be selectively inhibited by pyrophosphate (PPi) generated in a nucleic acid amplification reaction, so that visual colorimetric analysis on whether target nucleic acid exists or not is realized. In combination with a polymerase chain reaction (PCR) system, the invention constructs a new nucleic acid detection strategy which does not need fluorescence labeling, is simple and convenient to operate and has high sensitivity. Through verification, the system can be widely applied to rapid on-site screening and visual interpretation of related nucleic acid of drug-resistant pathogens (such as ESKAPE flora) and the like, and has a good application prospect.

The invention relates to the technical field of biochemical engineering, in particular to a method for preparing chiral alpha-trifluoromethyl alcohol by using imine reductase AtRedAm, trifluoromethyl ketone is reduced into corresponding chiral trifluoromethyl alcohol at an excellent conversion rate by using the imine reductase AtRedAm, and enantioselectivity is high. The reaction depends on an NADPH (Nicotinamide Adenine Dinucleotide Phosphate) coenzyme circulation system, 10% dimethyl sulfoxide is used as a reaction cosolvent, the reaction is carried out in a 100mM (pH = 7.5) phosphate buffer solution for 16 hours, the highest molar conversion rate reaches 99%, and the highest optical purity reaches 95%.

The invention relates to the technical field of refractory materials, in particular to a waste magnesia-calcium brick-containing refractory material and a preparation method thereof, and the waste magnesia-calcium brick-containing refractory material comprises the following components: composite aggregate, calcium aluminate cement, urea resin-aluminum dihydrogen phosphate, active alpha-Al2O3 micro powder, silica micro powder and sodium tripolyphosphate. In the room-temperature spraying maintenance and low-temperature working stage, hydration of free CaO in the waste magnesia-calcium bricks and erosion of OH <-> are prevented through the hydrophobic effect of fluorinated polyphosphazene and modified zirconium oxide sol, and the compatibility and wettability of the composite aggregate and cement paste are improved through carboxylic acid groups of carboxyethyl silanetriol and polyethylene glycol monomethyl ether. According to the present invention, with the temperature rising, the aluminum dihydrogen phosphate forms the viscous liquid phase to wrap the aggregate so as to provide the temporary protection, the temperature continues to rise, the zirconium oxide and the nanometer Al2O3 react with the CaO and the MgO to generate the CaZrO3 and the MgAl2O3, the aluminum dihydrogen phosphate reacts with the nanometer Al2O3 in the system to generate the AlPO4, and the CaZrO3, the MgAl2O3 and the AlPO4 form the multi-phase fire-resistant structure so as to further improve the fire resistance of the fire-resistant material;

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for removing metallic impurities from acidic copper-containing etching wastewater at room temperature and pressure. The method includes the following steps: S1, adding an oxidant to the acidic copper-containing etching wastewater to conduct an oxidation-reduction reaction, obtaining a pretreatment solution; S2, adding phosphoric acid or soluble phosphate to the pretreatment solution, adjusting the pH to 1.3-1.7 using a pH adjuster, stirring, and filtering to obtain a purified copper-containing solution. The method provided by this invention achieves high removal rates for Fe, Ni, Zn, Ca, and Mg, while maintaining a high copper ion content. It can recycle and regenerate high-purity copper salt products for application in food, cosmetics, medical, electroplating, and other fields, while also reducing hazardous waste generation, improving economic efficiency, and significantly reducing costs.

The invention discloses a coating with in-situ plugging and active protection functions as well as a preparation method and application thereof, and belongs to the technical field of metal material surface treatment. An innovative electrolyte design scheme is provided, the commercial 5083 aluminum alloy is subjected to micro-arc oxidation in a phosphate system containing specific cerium salt and a complexing agent, film layer growth and in-situ chemical blocking of micropores are completed in one step, the process is simple, and the obtained coating has excellent blocking firmness and corrosion resistance, has an active protection function and is suitable for large-scale industrial production. And a new solution is provided for improving the durability of the 5083 aluminum alloy in a harsh marine environment.

The invention discloses a method for comprehensively recovering lithium beryllium resources in spodumene tailings, and belongs to the technical field of mineral separation. The method comprises the steps that after spodumene tailings are subjected to size mixing, amine and fatty acid serve as a combined collecting agent, flotation I is conducted, and mica concentrate and tailings I are obtained; after size mixing is conducted on the tailings I, sodium sulfide and phosphate serve as a combined inhibitor, a metal-hydroximic acid organic complex and fatty acid serve as a combined collecting agent, flotation II is conducted, and lithium beryllium bulk concentrate and tailings II are obtained; and after size mixing is conducted on the lithium beryllium bulk concentrate, flotation III is conducted with phosphate and EDTA as a combined inhibitor and fatty acid as a collecting agent, and beryllium concentrate and lithium-containing tailings are obtained. By means of the method, the beryllium concentrate with the BeO grade being 4.448% and the recovery rate being 64% can be obtained, meanwhile, the lithium concentrate with the Li2O grade being 4.8% and the recovery rate being 57.6% can be produced, deep comprehensive recovery of the lithium beryllium resources in the spodumene tailings is effectively achieved, and the economic benefit capacity is large.

The invention relates to the technical field of protective glue, in particular to extreme high and low temperature impact resistant UV (ultraviolet) photocuring electronic protective glue which is prepared from the following raw materials in parts by weight: 30-50 parts of synergistically modified epoxy-urethane acrylate oligomer, 20-35 parts of composite active monomer, 1.5-5 parts of composite photoinitiator and 10-20 parts of core-shell structure inorganic composite filler, 0.6 to 2.2 parts of a silane coupling agent, 0.12 to 1.1 parts of an antioxidant and 0.11 to 1 part of a leveling agent; the preparation method of the synergistically modified epoxy-urethane acrylate oligomer comprises the following steps: reacting resin acid modified epoxy resin with phosphoric acid di (hydroxyethyl acrylate) ester at 80-90 DEG C, and introducing a phosphate group to obtain a phosphate modified epoxy acrylate intermediate; the protection glue unifies rigidity, flexibility and flame retardance on the molecular level through the cooperation of the hybrid oligomer and the core-shell filler, realizes high heat conductivity, strong adhesion and extremely low internal stress, and has extreme temperature impact resistance, long-term damp-heat aging resistance and high-reliability protection performance.

The invention relates to the field of pharmaceutical analytical chemistry, in particular to a method for determining tandospirone and salt intermediates thereof, high performance liquid chromatography is adopted, and chromatographic conditions include that a chromatographic column with octadecylsilane chemically bonded silica as a filler is adopted, and gradient elution is performed by a mobile phase A and a mobile phase B; wherein the mobile phase A consists of a first water phase and acetonitrile; the mobile phase B is composed of a second water phase and acetonitrile; the first water phase is a water solution containing monopotassium phosphate and sodium hexanesulfonate, and the pH value of the first water phase is 3.0-3.8; the second water phase is an aqueous solution containing monopotassium phosphate and sodium hexanesulfonate, and the pH value of the second water phase is 1.8-2.6. The testing method disclosed by the invention has good specificity, accuracy and repeatability, and can be used for monitoring the quality of the tandospirone raw material medicine.

The invention provides a hole transport layer precursor solution, a hole transport layer, a preparation method and application of the hole transport layer, and a perovskite cell, and belongs to the technical field of hole transport layers. The hole transport layer precursor solution comprises a self-assembled single molecule and an organic solvent; the organic solvent comprises a solvent A, a solvent B and a solvent C; the solvent A comprises more than one of a phosphate ester solvent and an alcohol ether solvent; the solvent A contains four hydrogen bond receptors; the boiling point of the solvent A is 215-290 DEG C; the solvent B comprises more than one of ethanol, isopropanol, normal propyl alcohol, butanol, ethylene glycol and N, N-dimethylformamide; the solvent C comprises more than one of ethyl acetate and normal hexane. A ternary hydrogen bond network is formed through the solvent A, the solvent B and the solvent C, the agglomeration degree of SAM molecules is remarkably reduced, and the device performance is improved.

The invention relates to the technical field of water pollutant removal, in particular to a UiO-66 / sodium carboxymethyl cellulose / polyvinyl alcohol / melamine sponge composite material and a preparation method and application thereof.The preparation method comprises the steps that zirconium chloride and terephthalic acid are dissolved in an organic solvent to obtain a mixed solution, the mixed solution is transferred into a reaction kettle, and through solvothermal reaction, the UiO-66 / sodium carboxymethyl cellulose / polyvinyl alcohol / melamine sponge composite material is obtained; the preparation method comprises the following steps: preparing UiO-66 powder; putting UiO-66 powder into the sodium carboxymethyl cellulose solution, and uniformly stirring the UiO-66 powder and the sodium carboxymethyl cellulose solution to obtain a UiO-66 / CMC mixed solution; placing the UiO-66 / CMC mixed solution in a polyvinyl alcohol solution, and uniformly stirring the UiO-66 / CMC / PVA mixed solution to obtain a UiO-66 / CMC / PVA mixed solution; the preparation method comprises the following steps: dipping a melamine sponge in a UiO-66 / CMC / PVA mixed solution to obtain an adsorption saturated melamine sponge; the UiO-66 / CMC / PVA / coated MS composite material is obtained by repeatedly freezing and thawing the adsorption saturated melamine sponge for multiple times and then freeze-drying, the composite material can be used for rapidly, efficiently and selectively removing phosphate or fluorine ions and the like in water and is convenient to separate and recycle, and a new thought is provided for development of efficient water treatment adsorbent materials.

The invention discloses a multi-network anti-freezing hydrogel electrolyte, a preparation method thereof and application of the multi-network anti-freezing hydrogel electrolyte in an electrochemical device. The hydrogel is prepared by using polyvinyl alcohol (PVA) and polyacrylamide (PAM) to form a basic network skeleton, introducing phytic acid, ethylene glycol and lithium / zinc bimetal salt (Li2SO4 / ZnSO4), and carrying out thermal initiation polymerization and freeze thawing. The hydrogel prepared by the invention has a multiple physical cross-linked network formed by polymer molecular chain entanglement, hydrogen-bond interaction among functional groups and metal coordinate bonds constructed between phosphate groups and divalent metal ions, so that the hydrogel electrolyte has excellent mechanical properties. Due to introduction of ethylene glycol, formation of ice crystals is effectively inhibited, and the hydrogel is endowed with excellent anti-freezing performance; the high-concentration Li < + > and Zn < 2 + > ensure the high ionic conductivity. The supercapacitor assembled by using the hydrogel electrolyte shows relatively high specific capacitance and good capacitance retention rate under bending and freezing conditions, and has good electrochemical properties and safety performance.

The invention discloses a flame-retardant reinforced polycarbonate composite material and a preparation method thereof, and belongs to the technical field of polycarbonate composites.The flame-retardant reinforced polycarbonate composite material comprises 70%-90% of polycarbonate resin, the polycarbonate resin is aromatic polycarbonate with the viscosity average molecular weight ranging from 20000 to 35000; the glass fiber is alkali-free chopped E glass fiber, and the surface of the glass fiber is treated by an amino silane coupling agent; the flame retardant comprises 5-15% of a phosphorus-nitrogen-silicon composite flame retardant, the composite flame retardant is a synergistic system formed by physically premixing a phosphate ester compound, a nitrogen charring agent and a silicone polymer, and the phosphate ester compound plays a role in gas-phase flame retardance and partial condensed-phase flame retardance during combustion. By adopting a phosphorus-nitrogen-silicon composite flame-retardant synergistic system, high flame-retardant efficiency is realized under the condition of low additive amount, the halogen-free and environment-friendly effects are realized, and the environmental and health hidden dangers of the traditional brominated flame retardant are overcome.

The invention relates to a bionic strong acid-resistant nanofiltration membrane and a preparation method thereof, and the bionic strong acid-resistant nanofiltration membrane comprises a porous support layer and an active separation layer formed on the surface of the porous support layer, the active separation layer is a polymer network layer formed by carrying out interfacial polymerization reaction on a water-phase solution containing polyamine and an oil-phase solution containing polyacyl chloride on the surface of the porous support layer. The water-phase solution and / or the oil-phase solution also contains a bionic amphiphilic phosphate compound, the bionic amphiphilic phosphate compound participates in interfacial polymerization reaction through an active functional group in a molecular structure of the bionic amphiphilic phosphate compound, and the phosphate structure of the bionic amphiphilic phosphate compound is covalently connected into a skeleton of the polymer network layer. The preparation method has the beneficial effects that the bionic amphiphilic phosphate compound with a hydrophilic phosphate head, a hydrophobic alkyl tail and a reaction site is synthesized, so that the bionic amphiphilic phosphate compound is spontaneously and orderly arranged on a water / oil interface and participates in interfacial polymerization, the film forming uniformity is improved, the pore size distribution is narrowed, and the intelligent response characteristic is given to the film.

The invention discloses a preparation method and application of fine-grained melamine phosphate.The preparation method comprises the steps that after melamine, water and a composite surfactant are ultrasonically mixed to be uniform, the ultrasonic power is improved, phosphoric acid is dropwise added, then the ultrasonic power is reduced, a temperature rise reaction is conducted to obtain reaction liquid, and then the fine-grained melamine phosphate is obtained after cooling, filtering, washing and drying are conducted; wherein the composite surfactant is composed of a gemini surfactant and a polymer surfactant according to a mass ratio of (1-20): (5-40). According to the preparation method disclosed by the invention, the composite surfactant and the multi-stage ultrasonic treatment are utilized to cooperate with the mixed materials and react, so that the fine-grained melamine phosphate with the particle size of 1-4.5 microns is prepared, and the preparation method has the advantages of high reaction efficiency, simplicity in operation and the like.

The invention relates to the technical field of refractory materials, in particular to an antioxidant and application thereof in steel ladle slag line bricks, and the antioxidant comprises a Si / SiC multiphase material, modified nano Al2O3 and CaF2; the ladle slag line brick comprises an antioxidant, fused magnesite, crystalline flake graphite and phenolic resin. Si-SiC compound waste is subjected to magnetic separation and acid pickling, then a SiO2 passivation layer is formed through pre-oxidation, moisture and air in the storage period are isolated, and a titanate coupling agent is introduced to improve the wettability and compatibility with phenolic resin. P2O5 released by phosphate on the surface of the modified nano Al2O3 at a high temperature reacts with alkali (earth) metal migrated to a SiO2 oxide layer to prevent the alkali (earth) metal from forming a low-melting-point eutectic substance, CaF2 reacts with SiO2 along with temperature rise, a passivation layer is broken, internal Si and SiC are directly exposed, and boron oxide of the modified nano Al2O3 remarkably reduces activation energy and a temperature threshold value of the reaction of CaF2 and SiO2.

The invention discloses a phosphate ester type composite binder for a sulfide battery, the phosphate ester type composite binder comprises a solute and a solvent, the solute comprises the following components in percentage by mass: 49.75%-88.5% of a binder, 9.5%-49.75% of phosphate ester and 0.45%-1.96% of silanol; the solvent is a non-polar solvent, and the mass ratio of the solute to the solvent is 1%: (10%-90%); the preparation method comprises the following steps: S1, placing the binder in a non-polar solvent, and heating and stirring until the binder is completely dissolved to obtain a solution A; s2, mixing a silane coupling agent with absolute ethyl alcohol, adjusting the pH value with acetic acid, and stirring to generate silanol; s3, silanol is added into the solution A, so that one end of silanol reacts with active hydrogen of the binder for bonding; and S4, adding phosphate into the solution A, so that the other end of the silanol is combined with a group of the phosphate to obtain a reaction solution with a binder-silanol-phosphate structure. According to the invention, stable combination of the binder and phosphate is realized through a silanol-mediated grafting structure, and the interface stability, the ionic conductivity and the mechanical strength are improved.

The invention relates to a method for preparing lithium dihydrogen phosphate from a lithium-containing solution by using an extraction-reverse extraction technology, an extraction agent adopted in the method comprises a main extraction agent, a synergistic extraction agent and a diluent, the pKa value of the main extraction agent is 2.2-7, the synergistic extraction agent has a P = O group or a cavity diameter of 0.12-0.15 nm, the water solubility of the synergistic extraction agent is less than or equal to 50 mg / L, and the diluent is a diluent. The synergistic extraction factor R of the extraction agent is more than 100, R = Dmix / (D1 + D2), Dmix is the extraction distribution ratio of the main extraction agent to the lithium when the main extraction agent and the synergistic extraction agent are mixed according to the mass ratio of 1: 1-1: 2, D1 is the extraction distribution ratio of the main extraction agent to the lithium, D2 is the extraction distribution ratio of the synergistic extraction agent to the lithium, and the stripping agent is phosphoric acid. According to the method disclosed by the invention, by selecting the main extraction agent and the synergistic extraction agent, on one hand, lithium monohydrogen phosphate and lithium phosphate impurities cannot be generated by reaction when phosphoric acid is adopted for reverse extraction, and on the other hand, higher separation degree on sodium and potassium can be achieved during extraction, so that high-purity lithium dihydrogen phosphate can be efficiently prepared.

The invention relates to a flame-retardant high-temperature-resistant fiber woven fabric and a preparation process thereof, and belongs to the technical field of textiles. The preparation method comprises the following steps: grafting and crosslinking a self-made grafting monomer and polyvinyl chloride, and then weaving to obtain the modified polyvinyl chloride fiber fabric; a phosphate group in the monomer can promote surface carbonization to form a protective carbon layer, silicate generated by decomposition of a siloxy group at a high temperature is combined with the carbon layer to improve the strength and melt viscosity of the carbon layer, and the phosphate group and the siloxy group synergistically enhance the flame retardance and the molten drop resistance of the fabric; a cyclic phosphate group and a pyridine ring are connected to form a rigid structure with relatively high thermal stability, chain segment movement is limited, a plurality of siloxy groups in a monomer are crosslinked to form a crosslinked network, molecular chain segments are difficult to move, and the combination of the rigid group and the crosslinked network improves the high temperature resistance of the fabric and effectively improves the mechanical properties of the fabric; in addition, the positively charged quaternary ammonium salt structure in the monomer improves the antistatic performance of the fabric, and cooperates with trifluoromethyl to destroy the structural integrity of bacterial cells, so that the fabric achieves efficient bacteriostasis.

The invention discloses preparation of a phosphate radical modified carbon quantum dot nickel-based catalyst and application of the phosphate radical modified carbon quantum dot nickel-based catalyst in alkaline seawater electrolysis, and belongs to the technical field of hydrogen production through electro-catalysis and seawater electrolysis. The preparation method of the phosphate radical modified carbon quantum dot nickel-based catalyst comprises the following steps: mixing citric acid and urea in water to obtain a carbon quantum dot precursor solution; and mixing the carbon quantum dot precursor solution, phytic acid and a nickel substrate, and reacting to obtain the phosphate radical modified carbon quantum dot nickel-based catalyst. The phosphate radical modified carbon quantum dot nickel-based catalyst is designed by introducing a composite modification layer of carbon quantum dots and phosphate radicals on the surface of a nickel substrate, and the phosphate radical modified carbon quantum dot nickel-based catalyst has an obvious promotion effect on the OER activity through the synergistic effect of PO4 groups and CDs in the phosphate radical modified carbon quantum dot nickel-based catalyst; therefore, the catalyst can show excellent oxygen evolution reaction activity and long-term stability in alkaline seawater containing Br <-> and Cl <->.

The invention provides a method for promoting generation of tea acid from Nemania sp YAFEF112, and relates to the technical field of microbial culture. According to the method, mycelia of Nemania sp YAFEF112 are inoculated into a culture medium containing pruned walnut branches for culture, the culture medium is an MM culture medium, and the specific formula of the culture medium comprises 1.52 g / L of monopotassium phosphate, 0.52 g / L of magnesium sulfate, 6 g / L of sodium nitrate and 0.52 g / L of potassium chloride. According to the method, the defects in the prior art are overcome, and good conditions are provided for the production of the tea pickled acid by optimizing the formula of the fermentation culture medium, adding pruned walnut branches into the culture medium, improving the fermentation conditions and increasing the content of the tea pickled acid in the Nemania sp YAFEF112 hyphae.

The invention provides an application of inositol monophosphate in an enzyme catalysis reaction system for preparing inositol. The invention also provides a preparation method of the inositol, the starch is used as a substrate, glucan phosphorylase, glucose phosphate mutase, inositol-3-phosphate synthase and inositol monophosphate are added as enzyme catalysts to catalyze the substrate to generate the inositol, the inositol monophosphate is derived from Archaeoglobus fulgidus, the amino acid sequence is shown as SEQ ID NO: 12, or the amino acid sequence is shown as SEQ ID NO: 1, or the amino acid sequence is shown as SEQ ID NO: 2, or the amino acid sequence is shown as SEQ ID NO: 3, or the amino acid sequence is shown as SEQ ID NO: 4, or the amino acid sequence is shown as SEQ ID NO: 5, or the amino acid sequence is shown as SEQ ID NO: 6. The inositol monophosphate is derived from Thermococcus kodakarensis, and the amino acid sequence of the inositol monophosphate is as shown in SEQ ID NO: 13; or the inositol monophosphate is derived from Pseudothermotoga lettinae, and the amino acid sequence of the inositol monophosphate is as shown in SEQ ID NO: 14. Inositol-3-phosphate synthetase and inositol monophosphate with good performance are screened, high-concentration starch is efficiently catalyzed to be converted into inositol by a one-pot method in a whole-cell feeding mode, and NAD < + > and other coenzymes do not need to be used. Under a 60L reaction system, 200g / L of corn starch is catalyzed, the unit yield of the prepared inositol reaches 161g / L, and the method has a good industrial application prospect.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for removing metal impurities from acidic copper-containing etching wastewater at normal temperature and pressure. The method for removing the metal impurities from the acidic copper-containing etching wastewater at normal temperature and pressure comprises the following steps: S1, adding an oxidizing agent into the acidic copper-containing etching wastewater to carry out oxidation-reduction reaction to obtain a pretreatment solution; and S2, phosphoric acid or soluble phosphate is added into the pretreatment solution, the pH is adjusted to 1.3-1.7 through a pH adjusting agent, stirring and filtering are conducted, and the purified copper-containing solution is obtained. According to the method, the removal rate of Fe, Ni, Zn, Ca and Mg is high, high-content copper ions can be kept, a high-purity copper salt product can be recycled and regenerated to be applied to the fields of food, cosmetics, medical treatment, electroplating and the like, hazardous waste can be reduced, economic benefits are improved, and cost is greatly reduced.

The invention relates to the technical field of functional coatings, in particular to a graphene reinforced heavy-duty epoxy coating for a marine environment. The invention discloses a graphene-based epoxy resin coating which is prepared from the following raw materials in parts by weight: 60-80 parts of bisphenol A epoxy resin, 5-10 parts of aminated graphene-carbon nanotube composite powder, 3-6 parts of zinc-aluminum-cerium ternary composite phosphate, 3-6 parts of nano boron nitride / silicon dioxide core-shell particles, 15-25 parts of a polyamide-epoxy curing agent, 1-3 parts of a silane coupling agent KH-560 and 5-8 parts of cashew nut shell oil modified phenolic aldehyde amine. The anti-rust paint is prepared from the following components in parts by weight: 0.5-2 parts of carboxylated graphene quantum dots, 2-4 parts of organic montmorillonite, 0.1-0.5 part of a fluorocarbon surfactant, 8-15 parts of a composite anti-rust pigment and 10-20 parts of an organic solvent. The coating is excellent in corrosion resistance, capable of resisting marine corrosion for a long time, resistant to high temperature and resistant to cathodic disbonding, has the functions of aging tracing and biological adhesion resistance, is convenient to construct and stable in performance, and provides reliable protection for ocean engineering.