4140 results about "Chloride" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The invention relates to a concrete chloride ion gradient monitoring and durability enhancing method and system based on MXene, and solves the problems that a traditional drilling sampling method is high in operation process destructiveness, high in cost and low in detection efficiency, test results are remarkably influenced by environmental conditions, and field real-time performance and universal applicability are lacked. The method comprises the following steps: embedding a plurality of prefabricated sensing units containing MXene-Cl composite electrode layers and toughening protection layers into concrete at different depths according to a vertical gradient to form a monitoring network; potential signals are collected through a sensing unit, after correction, the potential signals are introduced into a Nernst equation for inversion to obtain the chloride ion concentration, and osmotic distribution imaging is achieved by combining a preset vertical and transverse gradient estimation method. The intercalation adsorption characteristic of MXene on chloride ions is utilized to capture and retard migration of the chloride ions to the reinforcing steel bar. The method has the advantages that chloride ions are monitored in real time, migration of the chloride ions to the steel bars is blocked, the concrete degradation state is evaluated in combination with multi-parameter data, and early warning and durability improvement are achieved.

The invention relates to a concrete degradation simulation method and system under continuous load-chloride ion coupling, and solves the problems that systematic research on overall mechanical property degradation of a concrete structure under the load and chloride ion coupling effect is lacked, and the degradation condition of the concrete structure in an actual service environment is difficult to comprehensively reflect. The method comprises the following steps: applying a continuous load to a test block, preparing a solution according to a stress type to determine a chloride ion diffusion direction, applying an electric field to accelerate migration and maintain test stability, and after an experiment, measuring the penetration depth and calculating a diffusion coefficient; in the process, multi-dimensional data such as cracks and acoustic emission are collected and subjected to PCA dimension reduction and redundancy removal, then damage factors are inversed through deep learning modeling in combination with dual-stage optimization and physical constraint, and finally damage and chloride ion parameters are fused to form gradient parameters fitting actual degradation. The method has the following effects that the concrete degradation process is accurately simulated, a basis is provided for durability evaluation and life prediction, and the engineering safety and economy are improved.

The invention discloses a concrete chloride ion diffusion prediction method based on physical enhancement characteristics and an XGBoost model, and the method comprises the steps: forming enhancement input data through constructing physical characteristics, material composition characteristics and durability related indexes which reflect a diffusion process mechanism, and inputting the enhancement input data into the XGBoost model for training and prediction. By reasonably setting a model structure and a training strategy, high-precision modeling and prediction of a diffusion coefficient are realized, and key influence factors are analyzed and identified in combination with feature importance. According to the invention, high-precision prediction of the concrete chloride ion diffusion behavior is realized. On the basis of fully considering concrete material composition and environmental factors, the model generates expansion features with clear physical significance, and improves the fitting ability to the diffusion process. Meanwhile, the performance of the model is optimized through evaluation indexes, it is ensured that the model has good stability and generalization ability under different data conditions, and therefore reliable prediction support is provided for concrete formula design and construction scheme adjustment.

The invention relates to the technical field of water treatment, and discloses a modified polyaluminum chloride flocculant and a preparation method thereof.The modified polyaluminum chloride flocculant is prepared from, by weight, 50-65 parts of polyaluminum chloride, 8-12 parts of magnesium silicate, 5-8 parts of carboxymethyl chitosan, 15-25 parts of polyaluminum ferric chloride and 3-5 parts of tea polyphenol; the molar ratio of aluminum ions to iron ions in the modified polyaluminum chloride flocculant is (3-4.5): 1. According to the invention, an inorganic-organic dual-modifier synergistic effect mechanism is adopted to construct a'rigid framework-flexible network 'composite structure, and the structure can significantly improve the adsorption capacity of Pb < 2 + >. Meanwhile, the mechanical property of the flocculating agent is improved, so that the flocculating agent can be applied to a high-turbulence environment.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to a phenylboronic acid-based P / N / B-containing halogen-free flame retardant, a preparation method thereof and application of the phenylboronic acid-based P / N / B-containing halogen-free flame retardant in epoxy resin. The preparation method comprises the following steps: by taking diphenyl hypophosphorous chloride as a basis, preparing a flame-retardant intermediate through nucleophilic substitution reaction between diphenyl hypophosphorous chloride and an aldehyde group-containing phenolic compound, then reacting a phenylboronic acid structure with 3-amino-1, 2-propylene glycol to obtain an amino group-containing phenylboronic acid compound, and finally reacting the phenylboronic acid compound with 3-amino-1, 2-propylene glycol to obtain the amino group-containing phenylboronic acid compound. And finally, carrying out a Schiff base reaction on the flame-retardant intermediate and an amino-containing phenylboronic acid compound to obtain the halogen-free flame retardant containing phosphorus, nitrogen and boron elements. The flame retardant provided by the invention can significantly improve the flame retardant property and mechanical property of epoxy resin. A flame-retardant epoxy resin prepared based on the flame retardant; the influence on Tg of an epoxy resin cured product is small, the smoke suppression and char formation performance and the mechanical performance of the cured product can be remarkably improved, and meanwhile, the flame retardant has excellent flame retardant efficiency; the limit oxygen index of the flame-retardant epoxy resin can reach 31%; the vertical combustion grade is V-0 or above, and the carbon residue amount can reach 18% or above.

The invention belongs to the technical field of nickel-based alloy welding wires, and discloses a corrosion-resistant nickel-based alloy welding wire and a production process thereof, and the corrosion-resistant nickel-based alloy welding wire comprises the following components in percentage by mass: 50-65% of nickel, 16-24% of chromium, 8-10% of molybdenum, 3.5-5.5% of niobium and tantalum, 3-4.5% of copper, 3-4% of tungsten, 0.5-1.0% of tin, 0.1-0.3% of rare earth element, 0.1-0.5% of grain boundary optimizer, 2-5% of nano reinforced phase and the balance of Fe and other inevitable impurities. Through multi-element alloying design, nano reinforced phase compounding and gradient coating synergistic effect, comprehensive improvement of corrosion resistance, high-temperature mechanical property and welding manufacturability is achieved; a welding wire base body is based on nickel, a compact and self-repairing gradient oxidation film is formed by accurately regulating and controlling the atomic proportion of chromium, molybdenum and tungsten, and the chloride ion permeation resistance and the high-temperature oxidation resistance are remarkably improved; therefore, the welding wire has excellent corrosion resistance, high-temperature strength and welding adaptability.

The invention provides an anti-aging flame-retardant epoxy resin coating and a preparation process thereof, and belongs to the technical field of coating preparation. The preparation process comprises the following steps: preparing the flame-retardant additive; preparing a coated modified black phosphorus nanosheet; preparing modified hollow glass beads; preparing the epoxy resin coating. The preparation method comprises the following steps: dissolving 3, 4-dihydroxy benzaldehyde and 2-amino-4-methylphenol in absolute ethyl alcohol, carrying out a heating reflux reaction, carrying out dehydration condensation on an aldehyde group in the 3, 4-dihydroxy benzaldehyde and an amino group in the 2-amino-4-methylphenol to generate an imine bond-containing intermediate, respectively dissolving the intermediate and phosphonitrilic chloride trimer, and carrying out a reaction to obtain the phosphonitrilic chloride trimer. The preparation method comprises the following steps: firstly, adding phosphonitrilic chloride into an intermediate, then mixing for reaction, enabling phenolic hydroxyl groups in the intermediate and phosphonitrilic chloride trimer to be subjected to nucleophilic substitution reaction to generate the flame-retardant additive containing phosphorus and a Schiff base structure, and the flame-retardant additive has relatively good compatibility with an epoxy resin matrix, is not easy to separate out and can effectively improve the flame-retardant property of the epoxy resin coating.

The invention relates to the technical field of cementing materials, in particular to an early-strength type freeze-thaw cycle-resistant cementing material and a preparation method thereof. The cementing material comprises the following raw materials in parts by mass: 50 parts of steel slag, 32-42 parts of blast furnace slag, 11-17 parts of desulfurized gypsum, 22-30 parts of fly ash, 3-5 parts of calcium chloride, 4-7 parts of a composite alkali activator and 11-17 parts of an interface treating agent. Through the combined action of the composite alkali activator and the interface treating agent, the mechanical strength and the freeze-thaw cycle resistance of the cementing material are improved at the same time, and particularly, the early strength and the freeze-thaw cycle resistance are improved at the same time, so that the cementing material can be applied to high-humidity and cold regions.

The invention belongs to the technical field of sewage treatment, and particularly relates to a demulsifier for eliminating an oil-water interface emulsion layer in oilfield produced liquid treatment and a preparation method of the demulsifier. The preparation method comprises the following steps: adding acrylamide, 1-allyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imine salt, allyl tributyl phosphonium chloride and deionized water into a first reactor, and heating and dissolving the acrylamide, the 1-allyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imine salt, the allyl tributyl phosphonium chloride and the deionized water; adding allyl (diisopropylamino) dimethylsilane, butyl acrylate, deionized water, octylphenol polyoxyethylene ether-10, lauryl sodium sulfate and monopotassium phosphate into the second reactor, and stirring to obtain an emulsion; adding an initiator and sodium hydrogen sulfite into a second reactor, carrying out heating and heat preservation reaction, pouring the mixed solution in the first reactor, and continuously carrying out reaction, heating and heat preservation to obtain a viscous liquid; and drying and granulating the viscous liquid to obtain the demulsifier. The demulsifier provided by the invention has the characteristics of simple synthesis process and high demulsification rate.

The invention belongs to the technical field of synthesis of magnesium hydroxide flame retardants, and provides a synthesis method and flame-retardant application of hexagonal flaky magnesium hydroxide, and the synthesis method comprises the following steps: step 1, dissolving a mineralizer, a crystal form control agent and magnesium chloride in water in proportion; step 2, putting a certain amount of the mixed solution into a high-pressure reaction kettle for hydrothermal reaction; step 3, after the reaction is finished, taking out the cooled solution from the high-pressure reaction kettle, and filtering and separating out a white product; 4, drying the sample, and grinding to obtain pure magnesium hydroxide powder; through reasonable process design and optimization, the prepared magnesium hydroxide not only has regular morphology and better dispersity, but also has excellent performance in the field of flame retardance of high polymer materials, meets the requirement of environmental protection, has the production advantages of low cost and high efficiency, and is suitable for industrial production. The method not only can effectively improve the overall utilization rate of salt lake resources, but also has remarkable economic and application values, and has wide industrial application prospects.

The invention discloses a low-cost and environment-friendly process for producing 1, 4-bis (4-fluorobenzoyl) benzene, and belongs to the technical field of Friedel-Craft reaction, fluorobenzene and paraphthaloyl chloride react to generate 1, 4-bis (4-fluorobenzoyl) benzene, after reaction quenching, filtering is performed to obtain a crude product 1, 4-bis (4-fluorobenzoyl) benzene and filtrate, and the 1, 4-bis (4-fluorobenzoyl) benzene is purified in a sublimation crystallization mode; standing and layering the filtrate in an inclined plate layering device, respectively treating an oil layer and a water layer, dehydrating a fluorobenzene layer in a dehydrating tower, and returning fluorobenzene; the water phase is firstly subjected to organic matter removal treatment, the obtained organic matter enters a fluorobenzene recovery device to be sleeved back, and the obtained water phase is a byproduct of crystallized aluminum chloride in an evaporative crystallization device. According to the process, the 1, 4-bis (4-fluorobenzoyl) benzene is produced in a sublimation crystallization mode instead of a solution crystallization mode, no waste solvent is generated, the waste solvent does not need to be recycled, the cost is low, organic matter removal and evaporative crystallization treatment is carried out on wastewater, organic matter recycling is carried out, crystalline aluminum chloride is produced as a byproduct, and wastewater and waste salt are not discharged.

The invention relates to a concrete anti-cracking self-repairing agent in the technical field of building materials, and aims to solve the problem that concrete cracks are difficult to self-repair. According to the technical scheme, the self-repairing agent is characterized by comprising a microbial repairing unit formed by ZSM-5 type zeolite molecular sieve loaded bacillus pasteurii spores, mesoporous silica particles loaded with L-calcium aspartate and Fe3O4 (at) SiO2 core-shell nanoparticles which are fixed through an in-situ polymerization coating layer to form a magnetic thermal response capsule layer coating the surface of the microbial repairing unit, pLGA microspheres containing yeast extract are positioned on an interface of zeolite and hydrogel, and a trehalose-anhydrous calcium chloride eutectic compound is used as a directional mineralization accelerant. The concrete anti-cracking self-repairing agent provided by the invention is mainly used for intelligent identification and self-repairing of concrete cracks, and efficient repairing is realized through a microbial mineralization, calcium ion slow release and magnetic thermal response synergistic mechanism.

The invention belongs to the technical field of concrete, and particularly relates to a preparation method and application of coal gangue-based ultra-high performance concrete UHPC for wet joints. Through composite gradient activation of calcination and ball milling and alkali-lithium salt synergistic excitation, efficient dissolution of active components of the coal gangue is achieved, the 3d compressive strength of the UHPC material is larger than or equal to 120 MPa, the 28d compressive strength of the UHPC material is larger than or equal to 150 MPa, and the UHPC material is improved compared with a traditional coal gangue-based material; meanwhile, through the synergistic effect of nano SiO2 / graphene oxide multi-scale reinforcement and steel fiber toughening, the interface bonding strength reaches 12-14 MPa, the chloride ion diffusion coefficient is smaller than 1.5 * 10 <-12 > m < 2 > / s, and the problems of wet joint interface debonding and durability degradation are solved.

The invention belongs to the field of lithium ion battery materials, and discloses a chloride coated modified positive electrode material, which comprises a positive electrode material matrix and a chloride LiaMClb coated on the surface of the positive electrode material matrix, M is selected from at least one of Ti, Cr, Mn, Fe, Co and Cu, 1 < = a < = 4, 2 < = b < = 6. According to the preparation method, the chloride LiaMClb is deposited on the surface of the positive electrode material substrate in an atomic layer deposition mode. The invention also discloses a sulfide all-solid-state lithium ion battery which comprises the chloride coated modified positive electrode material. The LiaMClb is selected to coat the modified positive electrode material, the LiaMClb and the positive electrode material show good interface compatibility, and the good oxidation resistance of chloride ions can effectively inhibit the decomposition side reaction of the chloride ions and the positive electrode material in the lithium removal process.

The invention relates to a synthetic method of an ionic liquid and ZIF-8 composite material, which comprises the following steps: S11, adding 2-methylimidazole and octadecyl guanidine chloride into a polyethylene glycol 400 aqueous solution to obtain a solution I; s12, Zn (NO3) 2.6 H2O is added into a polyethylene glycol 400 aqueous solution, and a solution II is obtained; s13, mixing and stirring the solution I and the solution II for reaction, and centrifugally collecting obtained ZIF-8 nanoparticles; s2, adding the ZIF-8 nanoparticles into a sodium phosphotungstate solution, stirring to disperse the ZIF-8 nanoparticles into a suspension, then adding a dodecyl guanidine chloride aqueous solution into the suspension, and carrying out an ion exchange reaction; and centrifuging after the ion exchange reaction is finished. The invention further relates to application of the synthetic method of the ionic liquid and ZIF-8 composite material, and the ionic liquid and ZIF-8 composite material is used for adsorbing 2, 4-D in water. The preparation method is simple, the ionic liquid and the ZIF-8 composite material have good adsorption performance on 2, 4-D in water, and the 2, 4-D is convenient to desorb and is convenient to recycle.

The invention relates to the technical field of magnetic materials, in particular to high-performance samarium-iron-nitrogen powder and a preparation method and application thereof. The invention provides a preparation method of samarium-iron-nitrogen powder, which comprises the following steps: (1) mixing Sm2O3 powder, Fe powder and a Ca reducing agent, and carrying out reduction reaction to obtain samarium-iron alloy; (2) mixing and crushing the samarium-iron alloy, mixing the crushed samarium-iron alloy with a dispersant and a passivation solution, carrying out ball milling, separating, and drying to obtain samarium-iron alloy powder; (3) nitriding the samarium-iron alloy powder to obtain samarium-iron-nitrogen powder; wherein the dispersing agent is selected from at least one of alkali metal phosphates; the passivation solution comprises chromium chloride, nitric acid, sulfuric acid and colloidal silicon dioxide. The samarium-iron-nitrogen powder prepared through the method has good magnetic performance.

The invention discloses a temperature correction method of a chloride ion sensor, which comprises the following steps of: S1, arranging a micro array type chloride ion sensor of a pre-embedded concrete protective layer in an array mode, and determining an acquisition scheme; s2, carrying out anomaly detection on a MnO2 reference electrode in the micro array chloride ion sensor; s3, correcting an acquired potential value of the micro array type chloride ion sensor; s4, according to the Nernst potential-concentration logarithm linear relation, determining various coefficients of the standard equation under the control temperature in the concrete; and S5, determining a temperature compensation coefficient according to the Nernst potential-concentration logarithm linear relationship. And S6, calculating the concentration distribution condition of chloride ions at different depths in the concrete by using the sensor potential after temperature compensation. According to the invention, the influence of temperature on the measurement result of the chloride ion sensor can be effectively compensated, the potential abnormal interference in the measurement process of the sensor is effectively overcome, and the precision and reliability of the sensor are improved.

The invention provides a preparation method of a nickel-based composite oxygen evolution anode for alkalescent electrolyte. According to the invention, nickel-based alloy is used as substrates, two same substrates are respectively used as a working electrode and an auxiliary electrode, two-electrode system electrochemical oxidation reduction treatment at room temperature is carried out in a mixed solution of phosphate, carbonate and chloride, and two reconstructed nickel-based composite oxygen evolution electrodes are obtained at the same time. In the electrochemical oxidation process, nickel ions and other metal (Fe, Co, Cr and Mn) ions are dissolved out from the nickel-based alloy under the etching assistance of chloride ions; in the electrochemical reduction process, water on the electrode is reduced to form hydroxyl. Under continuous oxidation reduction, substance reconstruction is carried out to generate a composite catalyst layer of phosphate, carbonate and hydroxide of nickel and other metals, so that not only can the oxygen evolution activity be improved, but also metal dissolution and corrosion passivation when the catalyst is used in a weakly alkaline solution can be inhibited, and the durability of the electrode is greatly improved.

The invention provides high-durability concrete for inducing adhesion of marine fixing organisms and a preparation method, and belongs to the crossing field of marine fixing organisms and marine concretes.The concrete is prepared by adopting a porous carrier loaded with induction bacteria, and the impregnation process of the porous carrier loaded with the induction bacteria is optimized; according to the present invention, the barnacle can be induced to adsorb to the concrete surface, the chloride ion resistance of the concrete can be improved, and the concrete has characteristics of simple component, low preparation cost, green environmental protection, and wide application prospect, and can provide more effective protection for the loaded bacteria, and can induce the barnacle to adsorb to the concrete surface. The goal of high durability of the concrete for underwater ocean engineering can be achieved.

The invention relates to the technical field of electro-catalysis and hydrogen energy, in particular to a modified LDH-based catalyst and a preparation method and application thereof. The preparation method comprises the following steps: mixing trimesic acid, water, an organic solvent, a nickel salt, a cobalt salt and an iron salt, carrying out electro-deposition, washing and drying to obtain a NiFeCo-LDH (TA) catalyst; the preparation method comprises the following steps: soaking a NiFeCo-LDH (TA) catalyst in a silver salt solution, washing and drying to obtain the modified LDH-based catalyst. The modified LDH-based catalyst provided by the invention can effectively resist chloride ion corrosion and inhibit dissolution of active metals in layered double hydroxides (LDH) under high current density in seawater, can reach industrial grade current density under relatively low overpotential, and can stably run for more than 1000 hours.

The invention belongs to the technical field of electrochemical energy storage, and particularly relates to a low-temperature aqueous electrolyte for anchoring I < + > ions based on a double-coordination structure and a low-temperature four-electron aqueous zinc-iodine battery. The low-temperature aqueous electrolyte is a mixed solution of a zinc salt, an electrolyte additive and water, and the low-temperature aqueous electrolyte comprises 2-5 mol / L of the zinc salt and 0.3-0.6 mol / L of the electrolyte additive; the zinc salt is zinc perchlorate or zinc tetrafluoroborate. The low-temperature four-electron aqueous zinc-iodine battery comprises the low-temperature aqueous electrolyte. Compared with the prior art, the invention at least has the following beneficial effects: (1) the corrosion risk caused by chloride ion concentration is reduced; (2) efficient four-electron iodine positive electrode reaction is realized; and (3) obtaining the low-temperature four-electron aqueous zinc-iodine battery.

The invention discloses a preparation method of a dotenorad key intermediate, and belongs to the technical field of compound synthesis. In the preparation method of the dotenorad key intermediate, provided by the invention, 2-aminothiophenol and formaldehyde are used as raw materials to carry out cyclization reaction to prepare a compound as shown in a formula 1, and then the compound as shown in the formula 1 and 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 According to the method, 3-(3, 5-dichloro-4-methoxybenzoyl chloride)-2, 3-dihydro-1, 3-benzothiazole is used as a raw material, an amidation reaction is carried out on 3, 5-dichloro-4-methoxybenzoyl chloride in an aqueous solution of an organic solvent, and the key intermediate 3-(3, 5-dichloro-4-methoxybenzoyl)-2, 3-dihydro-1, 3-benzothiazole of dotenorad can be effectively prepared; the obtained dotenorad key intermediate is relatively high in yield and purity; moreover, benzothiazoline which is widely used in the prior art does not need to be used in the preparation method, an activating agent or a solubilizer does not need to be used, the operation method is simple, reaction conditions are mild, and the method is suitable for actual industrial production.

The invention relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention relates to the technical field of heavy metal recovery, in particular to a method for recovering heavy metal from metal waste. Comprising the following steps: preparing silicon-tungsten composite acid salt; preparing heteropolyacid powder; preparing a resin heteropolyacid composite material; heavy metals are recovered from metal wastes by a resin adsorption method. The silicon-tungsten composite acid salt is prepared under mild conditions through reaction of sodium metasilicate, sodium tungstate and potassium chloride, the operation is simple, the conditions are easy to control, the silicon-tungsten composite acid salt has rich active sites and a large specific surface area, the surface of the silicon-tungsten composite acid salt carries negative charges, and the surface of the silicon-tungsten composite acid salt is not prone to damage. Compared with a traditional chemical precipitation method, the method for extracting the heavy metal by using the silicon-tungsten composite acid salt does not need to add a large number of chemical reagents, and secondary pollution is reduced.

The invention provides a preparation method of a two-dimensional high-strength coating material, which comprises the following steps: under the protection of inert gas, dissolving melamine and trimesoyl chloride as reaction monomers in a solution A, adding triethylamine as an acid-binding agent, and promoting amidation reaction through magnetic stirring; after the reaction is finished, washing with saturated saline solution and NaHCO3 to remove impurities, and then obtaining high-purity two-dimensional polymer powder through the steps of solution mixing, ultrasonic treatment, centrifugal separation and the like. And finally, dissolving polymer powder in the solution F to prepare two-dimensional polymer solutions with different concentrations, and coating the two-dimensional polymer solutions on the surface of a substrate pretreated by acetone and isopropanol to obtain a flat and compact coating film. The triethylamine is adopted as the acid binding agent, so that the purity and the reaction efficiency of the polymer are improved, the preparation controllability and the structural uniformity of the coating material are remarkably improved, and the high-performance coating requirements in the fields of machinery, chemical protection and the like are met.

The invention discloses a polyetherketoneketone high-temperature-resistant wear-resistant non-stick coating and a preparation method thereof. The coating is prepared from the following components in parts by mass: 13 to 30 parts of a resin matrix group (containing 12 to 25 parts of titanium modified polyether ketone ketone resin, 1 to 5 parts of fluorine-free viscous resin and 0.65 to 6 parts of aluminum oxide), 0.5 to 3 parts of a nano reinforced group (containing 0.5 to 3 parts of KH-550 modified nano titanium dioxide, 0.025 to 0.6 part of cerium dioxide and 0.5 to 3 parts of boron nitride) and 62 to 71 parts of an auxiliary agent group. The preparation method comprises the following steps: 1) taking diphenyl ether, paraphthaloyl chloride and isophthaloyl chloride as monomers, and synthesizing titanium modified polyether ketone ketone resins with different viscosities through segmented polymerization (1.5-2.0 hours or 3.0-4.0 hours); 2) respectively preparing a smooth bottom layer water dispersion slurry and a wrinkled surface layer water dispersion slurry; and (3) forming a compact bottom layer and a micro-wrinkle surface layer on the base material by adopting a layered spraying and stepped sintering process (280-320 DEG C, 10-20 minutes). The whole system of the coating is fluorine-free and has temperature resistance gt; the coating has the characteristics of high temperature resistance (350DEG C), wear resistance (Taber wear rate of 3-5mg / 1000r), non-sticking (contact angle gt, 100 DEG C) and heavy corrosion resistance, and is suitable for cooking utensils and chemical equipment.

The invention discloses a preparation method and application of a ceramic glaze layer protecting and repairing material, and belongs to the technical field of cultural relic protection. The preparation method comprises preparation of a core-shell self-repairing nanocapsule, and the preparation of the core-shell self-repairing nanocapsule comprises the following steps: reacting a calcium chloride solution with a sodium hydroxide solution, then adding sodium polyacrylate and nano ZnO, and carrying out dispersion, centrifugation, washing and other operations to prepare the nano Ca (OH) 2-ZnO composite material. The nano Ca (OH) 2-ZnO composite material of the core-shell self-repairing nanocapsule can be rapidly released through the 3.5 nm aperture of the mesoporous SiO2 shell, glaze layer cracks are physically filled and react with CO2 in air to generate CaCO3 crystals, crack plugging is achieved, meanwhile, dynamic disulfide bonds of a PU layer are broken and recombined under stress stimulation, a crack interface is repaired through chemical bonding, and the performance of the core-shell self-repairing nanocapsule is improved. The 24-hour crack repair rate is greater than or equal to 96%, and the limitation of'one-time repair 'of a traditional material is solved.

The invention relates to the technical field of environmental science and engineering, and discloses a method for removing and recycling fluorine ions by promoting calcium fluoride precipitation through sulfate doping, and the method comprises the following steps: S1, preparing sodium fluoride solutions of sulfate with different concentrations, and analyzing the influence of different sulfate concentrations on calcium fluoride precipitation; s2, respectively adding calcium chloride solutions into the prepared sodium fluoride solutions of the sulfates with different concentrations; s3, the two solutions are subjected to a reaction within a set time, filtering is conducted after the reaction is conducted for a period of time, and the fluorine ion removal reaction is completed. By changing the concentration of sulfate in the sodium fluoride solution, the effect of the sulfate in calcium fluoride precipitation and the influence of the sulfate on the fluorine ion removal efficiency are researched; the positive effect and the action mechanism of the low-concentration sulfate in the calcium fluoride precipitation process are defined, and the problems that the influence of the sulfate in the high-fluoride wastewater on calcium fluoride precipitation is ignored, the calcium fluoride purity is low and the recovery difficulty is large are finally solved.

The invention discloses a preparation method of a rare earth element doped nickel-based selenide nano-material and application of the rare earth element doped nickel-based selenide nano-material in electro-catalysis water full-hydrolysis reaction. According to the method, nickel salt, cerium salt, selenium dioxide and potassium chloride are prepared into electrolyte, and the electrolyte is subjected to electro-deposition on a foamed nickel substrate to obtain Ce-doped Ni0.85Se nanoparticles growing on foamed nickel. The crystal structure and electron distribution of Ni0.85Se are optimized by doping trace rare earth element cerium, so that the HER and OER performances of the Ni0.85Se are greatly improved. The prepared catalyst is self-supporting closely-packed nanoparticles, the formed amorphous structure is easy to expose more active sites, the catalyst has good electrocatalytic hydrogen evolution and oxygen evolution performance under alkaline conditions, the overpotential in electrocatalysis of nickel-based selenide is greatly reduced, and the electrocatalytic performance of nickel-based selenide is improved. And excellent electro-catalytic activity is shown in electro-catalytic water full hydrolysis. And the self-supporting electrode is not easy to fall off due to generation of bubbles in the reaction process, so that the working stability of the catalyst is improved.