1105 results about "Benzenesulfonic acid" patented technology

The invention discloses a preparation method of a degradable transparent conductive polymer film, and belongs to the technical field of film preparation. Preparing dispersion liquid I through graphene oxide quantum dots; preparing a dispersion liquid II from polyaniline nanofibers; dissolving pyrrole and toluenesulfonic acid in N, N-dimethylformamide to prepare a reaction solution, adding the dispersion liquid I and the dispersion liquid II, stirring, and adding ferric chloride hexahydrate to obtain a reaction solution; adjusting the pH value of the reaction solution to 1.5, and heating to obtain a polypyrrole solution; preparing cellulose acetate, polyvinyl alcohol and N, N-dimethylformamide to obtain a cellulose acetate solution; mixing the polypyrrole solution and the cellulose acetate solution, adding glutaraldehyde to obtain a mixed solution, and pouring the mixed solution into a mold to prepare a composite wet film; and putting the composite wet film into a hot-pressing forming machine for hot-pressing to generate the polymer film. The conductive polymer film prepared by the invention can be applied to the fields of supercapacitor electrode materials, electromagnetic shielding materials, flexible sensors and the like, and provides a new high-performance material choice for the development of related fields.

The invention relates to a method for efficiently separating three components of lignocellulose biomass by using an alcohol-based ternary eutectic solvent, which comprises the following steps: uniformly mixing choline chloride, 4-chlorobenzenesulfonic acid and an organic alcohol solvent, heating in an oil bath, and stirring to obtain the alcohol-based eutectic solvent; the preparation method comprises the following steps: mixing an alcohol-based eutectic solvent with agriculture and forestry solid waste powder, putting the mixture into a reaction kettle, introducing carbon dioxide gas until the carbon dioxide gas forms subcritical carbon dioxide, and carrying out stepped progressive increase reaction under the reaction pressure of 2-4MPa to obtain an intermediate product; mixing the intermediate product with a reaction stopping agent, and performing suction filtration, cleaning, vacuum drying and grinding to obtain dry cellulose solid residual powder; adding deionized water of which the volume is 10 times that of the filtrate into the filtrate, standing, precipitating and centrifuging to obtain a lignin-enriched component; and adding a 5-30% ethanol solution, continuously stirring, centrifuging and drying to obtain the purified lignin. The lignin removal rate and the cellulose retention rate of the lignocellulose in the agricultural and forestry solid wastes are effectively improved.

The invention relates to the technical field of formaldehyde adsorption, in particular to a preparation method of modified activated carbon for removing formaldehyde, which comprises the following steps: S1, performing acidification pretreatment on coconut shell charcoal, and grafting the pretreated coconut shell charcoal with polyethyleneimine to obtain activated carbon loaded with polyethyleneimine; s2, carrying out dipping treatment and cyclohexanol treatment on the activated carbon loaded with polyethyleneimine to obtain functionalized activated carbon; s3, reacting the magnesium-aluminum hydrotalcite with a quaternary ammonium salt solution and a sodium benzenesulfonate solution to obtain modified hydrotalcite; reacting the modified hydrotalcite with a vinyl silane coupling agent to obtain vinyl hydrotalcite; s4, the vinyl hydrotalcite and 4-amino-3-hydrazino-5-sulfydryl-triazole are subjected to a reaction, and secondary modified hydrotalcite is obtained; and S5, dispersing the secondary modified hydrotalcite and the functionalized activated carbon in water, and adding glutaraldehyde to obtain the modified activated carbon. The modified activated carbon prepared by the preparation method disclosed by the invention realizes selective recognition, efficient adsorption and catalytic degradation of formaldehyde.

The invention provides a method for improving the efficiency of a perovskite solar cell, and relates to the technical field of solar cells, the cell structure sequentially comprises a bottom substrate, a transparent electrode, a hole transport layer, a perovskite light absorption layer, an interface modification layer, an electron transport layer, a buffer layer and a metal electrode from bottom to top; a new additive 4-(2-aminoethyl) benzenesulfonic acid hydrochloride is introduced into the perovskite light absorption layer, the additive is introduced into the perovskite light absorption layer by being dissolved in a perovskite precursor solution, and the dosage of the additive is 0.1-1.5 mg / mL. Based on the method, the defect density of shallow energy level and deep energy level of perovskite is reduced, a more intrinsic perovskite absorption layer is formed through induction, balance extraction of electrons and holes is promoted, and then the open-circuit voltage and efficiency of the solar cell are remarkably improved.

The invention relates to the technical field of ceramic materials, and provides a multilayer ceramic substrate and a preparation method thereof, the multilayer ceramic substrate comprises the following raw materials by weight: 100 parts of alumina, 2-3 parts of a flexibilizer, 3-6 parts of a sintering aid, 2-3 parts of a dispersant, 4-8 parts of a binder, 0.5-1 part of an aid, 4-6 parts of polyvinyl alcohol, and 30-35 parts of a solvent; the auxiliary agent is prepared from calcium carboxymethyl cellulose and calcium 2, 5-dihydroxybenzenesulfonate in a weight ratio of 1: (1-3). According to the technical scheme, the problem of poor bending strength of the ceramic substrate in the prior art is solved.

The invention discloses a preparation method of a self-humidifying membrane electrode of a proton exchange membrane fuel cell, relates to a preparation method of a membrane electrode, and aims to solve the technical problem of poor performance of the conventional self-humidifying membrane electrode. The method comprises the following steps: 1, synthesizing a COFs material by using 2, 4, 6-triformyl phloroglucinol and 2, 5-diaminobenzene sulfonic acid through a two-phase method; 2, preparing slurry a by using a Pt / C catalyst and a perfluorosulfonic acid ionomer solution; preparing self-humidifying catalyst layer slurry b from a COFs material, a Pt / C catalyst and a perfluorosulfonic acid ionomer solution; and 3, coating the slurry a on the anode surface of the proton exchange membrane, and coating the slurry b on the cathode surface to obtain the self-humidifying membrane electrode. According to the electrode, H2 / O2 is used as fuel, and the power density is 756.3 mW / cm < 2 > under the relative humidity of 20%; h2 / air is used as fuel, the power density is 437.8-879.7 mW / cm < 2 > under the relative humidity of 50%, and the material can be applied to the field of fuel cells.

The invention discloses a hyperbranched water reducing agent for high-tensile wet joint UHPC (Ultra High Performance Concrete) as well as a preparation method and application of the hyperbranched water reducing agent, and belongs to the technical field of concrete admixtures. The preparation method comprises the following steps: mixing pentaerythritol and maleic anhydride, adding a catalyst p-toluenesulfonic acid, and carrying out an esterification reaction to prepare an esterification product; carrying out amidation reaction on the esterification product, diethanol amine and a catalyst sodium ethoxide to obtain a prepolymer; acrylic acid, maleic anhydride and the prepolymer are dissolved in deionized water, an initiator ammonium persulfate is added for a free radical copolymerization reaction, and a main chain polymer is obtained; carrying out phosphorylation reaction on the main chain polymer and phosphorus pentoxide to obtain a phosphorylated main chain polymer; the phosphorylated main chain polymer, methoxypolyethylene glycol and a catalyst p-toluenesulfonic acid are subjected to an etherification reaction, a hyperbranched comb-shaped polymer water reducing agent solution is obtained and then subjected to aftertreatment, and the water reducing agent is prepared. According to the hyperbranched comb-shaped polymer water reducing agent prepared by the preparation method disclosed by the invention, the problems of poor flowability and high viscosity of ultra-high performance concrete (UHPC) are solved by combining a linear side chain of a comb-shaped structure and a three-dimensional branch of hyperbranched topology.

The invention provides a nano imbibition displacement agent suitable for shale oil reservoirs and a preparation method thereof, and the nano imbibition displacement agent comprises the following raw materials in parts by weight: 30-50 parts of sulfonated graphene oxide, 10-15 parts of silane coupling agent modified nano silicon dioxide, 10-20 parts of water-soluble cellulose ether, 10-20 parts of fatty alcohol-polyoxyethylene ether, 5-8 parts of lower alcohol and 50-80 parts of water. Graphene oxide reacts with concentrated nitric acid to prepare acidified graphene oxide, then the acidified graphene oxide reacts with thionyl chloride to prepare acylating-chlorinated graphene oxide, and the acylating-chlorinated graphene oxide reacts with a sodium aminobenzene sulfonate derivative to prepare the graphene oxide. Electrostatic repulsive force is generated among graphene oxide particles through surface sulfonation treatment, the dispersing capacity among the particles is improved, agglomeration and flocculation among the particles are avoided, and the recovery efficiency is improved; sulfonated graphene oxide cooperates with a large-molecular-weight water-soluble cellulose ether surfactant, so that the temperature resistance and the salt resistance of the nano imbibition displacement agent can be remarkably improved.

The invention discloses a lithium ion battery anti-cracking agent and a preparation method and application thereof.The preparation method is carried out under nitrogen protection and comprises the steps that a first polymer, a second polymer and a modifier are dissolved in a first solvent, and under the action of a catalyst, a reaction is carried out for 4-48 h at the temperature of 60-100 DEG C; and after the reaction is finished, cooling to below 40 DEG C, adding an amine compound, and reacting for 0.5-8 hours to obtain the anti-cracking agent for the lithium ion battery. The first polymer is polyvinyl butyral, and the hydroxyl content of the polyvinyl butyral is 18-21%; the second polymer is a triblock polymer as shown in a structural formula I, and the content of methyl methacrylate in the second polymer is 8-65%; the modifier is maleic anhydride or a maleic anhydride derivative; the catalyst is one of p-toluenesulfonic acid, hydrochloric acid and sulfuric acid. According to the anti-cracking agent, the battery pole piece can be intact and does not crack at high surface density under the condition of relatively low addition amount.

The invention relates to the technical field of ton bag lining materials, and particularly discloses a shielding antistatic ton bag lining bag and a preparation method thereof. The invention relates to a shielding antistatic ton bag lining bag, which is prepared by processing a multi-layer composite film with a structure of PET / antistatic layer / PA / PE, and the antistatic layer is prepared from the following raw materials by weight: 40-75 parts of a resin material; 20 to 40 parts of filler; 5-10 parts of a color master batch; 1-3 parts of an antistatic agent; 2-5 parts of a dispersant; 0.2 to 0.4 part of an antioxidant; 4 to 6 parts of polyimide nanofiber; 1-3 parts of a modified carbon nanotube; the modified carbon nanotube is prepared by the following method: S1, pretreating a carbon nanotube raw material with a concentrated nitric acid solution to obtain a pretreated carbon nanotube; and S2, dispersing the pretreated carbon nanotubes in xylene, then adding deionized water and p-toluenesulfonic acid, then adding an aniline monomer, then adding ammonium persulfate, and carrying out a reaction to obtain the composite material after the reaction is finished. The shielding anti-static ton bag lining bag can keep stable anti-static performance under the influence of a severe temperature change environment.

The invention discloses an all-solid-state composite dry conductive agent and a preparation method thereof, and belongs to the technical field of batteries. The all-solid-state composite dry conductive agent is prepared by the following steps: uniformly mixing carbon nanotubes, high-dispersion carbon black and graphene to obtain a primary mixture; then preparing a uniformly dispersed glue solution from the composite dispersant and water; and then adding the primary mixture into the glue solution, uniformly mixing, sanding, homogenizing, drying and crushing to obtain the product, the high-dispersion carbon black is obtained by oxidizing carbon black to form active groups such as carboxyl and hydroxyl on the surface of the carbon black, halogenating acyl and then reacting with lithium 2, 5-diaminobenzene sulfonate. The preparation method comprises the following steps: grafting histidine ester into carboxymethyl cellulose by using propylene glycol diglycidyl ester as a cross-linking agent, then introducing allyl-1, 3-sultone, then copolymerizing with lithium 2-acrylamido-2-methylpropanesulfonate and 3-aminobenzoic acid allyl ester protected by fluorenylmethoxycarbonyl, and then deprotecting to obtain the composite dispersant.

The invention relates to the field of additives for concrete, and particularly discloses a high-performance mould-proof release agent for concrete and a preparation method of the high-performance mould-proof release agent. The high-performance mould-proof release agent for concrete comprises the following raw materials in parts by weight: 10-20 parts of dimethyl silicone oil, 10-20 parts of hydrogen-containing silicone oil, 4-8 parts of paraffin, 2-4 parts of an emulsifier, 1-4 parts of a mould inhibitor, 3-5 parts of a reinforcing component, 2-5 parts of a thickening agent and 30-50 parts of water, the emulsifier is prepared from the following raw materials in percentage by mass: 23.5 to 25 percent of Span-80, 21 to 23 percent of dodecyl benzene sulfonic acid triethanolamine salt and the balance of OP-10. The release agent has the advantages of being good in storage stability, not prone to deterioration and layering, good in release effect, long-acting in antibacterial property and capable of enabling concrete test blocks to be high in strength.

The present invention discloses a preparation method of yellow azoxy and azo stilbene dyes. Using 4-nitrotoluene-2-sulfonic acid as a raw material and water as a reaction solvent, in the presence of choline hydroxide, dye yellow 11 is obtained through a condensation reaction. The molecular structure of choline hydroxide contains a quaternary ammonium salt group and a hydroxyl group. The hydroxyl group provides additional hydrophilicity, which helps to improve the solubility and dispersibility of the dye in an aqueous medium and enhance the affinity between the dye and the fiber. Choline hydroxide can effectively provide the alkaline environment required for the reaction, promote the synthesis reaction of the dye, and better control the selectivity and yield of the reaction. Since the choline hydroxide molecule contains a hydroxyl group, it can form hydrogen bonds with the sulfonic acid groups in the dye molecule, enhance the stability between dye molecules, and improve the light fastness and acid and alkali resistance of the dye. Using choline hydroxide not only optimizes the reaction conditions, improves the purity and yield of the dye, but also significantly improves the performance of dye yellow 11.

The invention relates to the technical field of medicines, in particular to a compound amlodipine atorvastatin calcium tablet and a production mixing device. The compound amlodipine atorvastatin calcium tablet is a core-coated tablet and comprises an inner-layer tablet core containing atorvastatin calcium and an outer-layer tablet layer containing amlodipine besylate, the inner-layer tablet core further comprises meglumine and sodium lauryl sulfate, the mass ratio of meglumine to sodium lauryl sulfate is (0.5-5): 1, the mass ratio of meglumine to sodium lauryl sulfate is (0.5-5): 1, and the mass ratio of meglumine to sodium lauryl sulfate is (0.5-5): 1. And the mass of the meglumine accounts for 1-3% of the total mass of the inner-layer tablet core. The amlodipine and atorvastatin calcium are prepared into the coated tablet, so that two active ingredients in the same tablet are effectively isolated, and the compatibility of the atorvastatin calcium and the amlodipine besylate is remarkably improved; meanwhile, the inner layer and the outer layer of the core-coated sheet are separately granulated before tabletting, so that the problem that the mixing uniformity of total mixed particles is relatively poor when conventional tablets are prepared is effectively solved.

The invention relates to the technical field of solder paste, in particular to halogen-free soldering flux for solder paste and a preparation method of the halogen-free soldering flux. The halogen-free soldering flux for the solder paste comprises the following raw materials in parts by mass: 20-40 parts of hydrogenated rosin, 1-5 parts of maleic anhydride, 0.1-0.4 part of p-toluenesulfonic acid, 1-5 parts of activated mesoporous silica, 10-20 parts of a composite organic acid active agent, 5-10 parts of a thixotropic agent, 1-3 parts of a tackifier, 1-2 parts of a pH regulator, 1-2 parts of a surfactant, 1-2 parts of a chelating agent, 1-2 parts of an antioxidant and 50-80 parts of an organic solvent. Through the innovative component design and the preparation process, the technical contradiction existing in the field of halogen-free scaling powder for a long time is effectively solved, and an ideal material solution is provided for high-reliability electronic packaging.

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

The invention relates to the technical field of foaming agents, and discloses a high-temperature-resistant foaming agent and a preparation method thereof. The high-temperature-resistant foaming agent is obtained by adding sulphobetaine modified benzoxazine, melamine benzene sulfonate modified polyoxyethylene ether, lauryl sodium sulfate and a polyvinyl alcohol foam stabilizer into water, stirring and mixing. The benzoxazine structure has relatively high rigidity and stability at a high temperature; sulfobetaine is an ampholytic surfactant and has high foaming capacity, sulfonic acid groups are high in temperature resistance, and the foaming performance and the high temperature resistance of the foaming agent are improved; melamine molecules are not easy to decompose at high temperature, so that the high temperature resistance of the foaming agent is improved; polyoxyethylene ether is a nonionic surfactant and has remarkable surface activity, the sulfonic acid group anions and the polyoxyethylene ether nonionic surfactant play a synergistic role, mixed micelles are formed in an aqueous solution, and the foaming performance of the foaming agent is improved.

This invention relates to a method for preparing a p-aminobenzenesulfonic acid blended nanofiltration membrane and its application. The invention aims to address the technical problem that existing polymer thin films struggle to simultaneously increase permeate flux while improving retention rate. This invention provides a nanofiltration membrane with high efficiency in separating cobalt and lithium ions and significantly enhanced permeate flux. It achieves this by doping p-aminobenzenesulfonic acid during the preparation of traditional TFC nanofiltration membranes, efficiently introducing sulfonic acid groups to promote the formation of an ordered nanochannel structure in the polyamide network, thereby increasing water flux. Simultaneously, the negative charge carried by the sulfonic acid groups enhances the overall electronegativity of the membrane, making it more effective against Co ions. 2+ The electrostatic adsorption capacity is significantly higher than that of Li + This enables efficient separation of cobalt and lithium ions. The nanofiltration membrane material provided by this invention can be widely used in the resource-based treatment of acid leaching wastewater from lithium cobalt oxide batteries, achieving efficient separation and recovery of cobalt and lithium, and improving economic benefits and resource utilization.

The invention provides a method for efficiently extracting light-color lignin and application. The method comprises the steps that bamboo is smashed, bamboo powder is screened out and dried, then formic acid is used for pretreatment and filtration to obtain solid residues, deionized water is used for washing the solid residues to be neutral, and solid matter is obtained after drying; treating the solid substance by using a tetrahydrofurfuryl alcohol / p-toluenesulfonic acid aqueous solution system, filtering out insoluble impurities to obtain filtrate, washing the insoluble impurities by using a tetrahydrofurfuryl alcohol aqueous solution and deionized water until the insoluble impurities are neutral, and reserving a washing solution; and adding water into the filtrate and the washing liquid for precipitation to obtain light-color lignin. According to the method for extracting the lignin, the yield is 66.9%, the purity is 99.64%, the obtained lignin is light in color (lightness: 70.48), the molecular weight of the obtained lignin is moderate (Mw: 4695), and the negative influence of the extraction process on lignin structural units is limited.

The invention belongs to the technical field of dispersants, and particularly relates to a high-performance water-based polymeric dispersant for ink and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a styrene-maleic anhydride copolymer; (2) mixing the styrene-maleic anhydride copolymer with dimethylformamide, heating to 100-105 DEG C, dissolving methoxy polyoxyethylene ether and p-toluenesulfonic acid in dimethylformamide, then dropwise adding into the reaction container, and reacting for 6-8 hours at the temperature of 100-105 DEG C to obtain a polyether grafted styrene-maleic anhydride copolymer; and (3) adding polyether amine into the polyether-grafted styrene-maleic anhydride copolymer, heating to 150-160 DEG C, carrying out reflux reaction for 4-6 hours under the protection of nitrogen, cooling, and carrying out reduced-pressure rotary evaporation to remove dimethylformamide, thereby obtaining the high-performance water-based polymeric dispersant for ink. The polymer dispersant has narrow particle size distribution after dispersion, and has good centrifugal stability, dilution stability and dispersion effect.

The invention provides a BVPE preparation method based on solid acid catalysis and continuous flow reaction, and relates to the technical field of disubstituted ethane preparation, and the method comprises the following steps: mixing a compound 1, a polymerization inhibitor, a solid acid catalyst and a solvent to form a reaction liquid; enabling the reaction liquid to pass through a fixed bed continuous flow reactor, and reacting at 20-180 DEG C for 1-45 minutes to obtain a compound 2; post-treating, separating and purifying a product; wherein the solid acid catalyst is an HZSM-5 type molecular sieve or acidic resin, the product purity and yield are high, the HZSM-5 type molecular sieve or acidic resin is adopted as the solid acid catalyst, residual pollution of traditional protonic acid (such as p-toluenesulfonic acid) is avoided, in embodiments 1-3, the product GC purity reaches 98.6%-99.1%, the yield reaches 88.8%-93.8%, and the product GC purity and the yield are remarkably higher than those of a contrast (the purity is 96.1%, and the yield is 74.2%).

The invention belongs to the technical field of cable waterproof design, and particularly relates to a pressure-resistant water-blocking layer and an insulated cable with the pressure-resistant water-blocking layer, the pressure-resistant water-blocking layer is formed by wrapping water-blocking cloth in the insulated cable, and the water-blocking cloth comprises water-blocking powder and base cloth used for loading and supporting the water-blocking powder. The water-blocking powder is a cross-linked copolymer of vinyl benzene sulfonate and acrylate, and the water absorption capacity of the pressure-resistant water-blocking layer is increased through the measure, so that the expansion degree of the pressure-resistant water-blocking layer is further increased, the internal structure of the cable is further expanded and densified, a water seepage channel in the cable is more favorably blocked, and the service life of the cable is prolonged. And water is prevented from further permeating into the deep part of the cable, so that the operation of the cable in a water environment can be better guaranteed.

The invention provides an antistatic agent for fuel oil and a preparation method thereof, and belongs to the technical field of petrochemical engineering, and the preparation method comprises the following steps: S1, adding soybean lecithin and chlorosulfonic acid into dichloroethane, uniformly mixing, under the protection of nitrogen, heating and stirring for reaction, neutralizing reaction liquid, and performing rotary evaporation to obtain sulfonated soybean lecithin; the preparation method comprises the following steps: adding sulfonated soybean lecithin and ethidene diamine into absolute ethyl alcohol, then adding p-toluenesulfonic acid, heating and stirring for reaction, and carrying out reduced pressure distillation to obtain modified soybean lecithin; s2, dispersing the SiO2 particles in absolute ethyl alcohol, adding KH-550, and performing ultrasonic treatment, centrifugation and drying to obtain pretreated SiO2 particles; and uniformly mixing the modified soybean lecithin and the pretreated SiO2 particles, adding the mixture into a supercritical fluid reactor, heating and pressurizing, ultrasonically dispersing, and drying to obtain the antistatic agent. The antistatic agent has the advantages of good dispersibility, strong stability and strong antistatic capability.

The invention belongs to the technical field of compound synthesis, and particularly relates to a synthesis method of AEA-AEA. Triethylene glycol is adopted as a starting material, in the first step, p-toluenesulfonate with high leaving property is formed through TsCl, then nucleophilic substitution is performed, and a product 2 is obtained; the preparation method comprises the following steps: preparing a product 3, oxidizing by adopting TEMPO capable of being industrially produced, removing Pht through quantitative hydrazine hydrate to obtain a product 4, esterifying and extracting to obtain a product 5, acylating through the product 3 to obtain amide, washing, extracting and pulping to obtain an esterified product 6; and finally, quantitatively removing Pht, hydrolyzing and pulping to obtain a pure product. According to the method, complex operation steps of using metal hydride and alkylating column passing are avoided, process production can be realized, and the product yield and purity are relatively high.

The invention discloses a preparation method of an ionic liquid covalent organic framework hybrid material and application of the ionic liquid covalent organic framework hybrid material to adsorption and separation of rare earth ions, and belongs to the technical field of environmental protection. The preparation method comprises the following steps: carrying out a Schiff base reaction on 2, 4, 6-trihydroxy-1, 3, 5-benzenetricarboxaldehyde and 2, 5-diaminobenzene sulfonic acid to prepare a sulfonic acid functionalized covalent organic framework; then the sulfonic acid functionalized covalent organic framework is hybridized with ionic liquid 1-carboxymethyl-3-methylimidazolium chloride by using an ion exchange method to obtain the ionic liquid covalent organic framework hybrid material, so that the problem of solution loss of the ionic liquid in a water phase is solved, and meanwhile, the adsorption performance of the material on rare earth ions is improved. The ionic liquid covalent organic framework hybrid material prepared by the invention is simple in preparation method and high in crystallinity, has excellent adsorption and separation performance on rare earth ions, and can be used as an efficient adsorbent for low-concentration rare earth tail water.

The invention relates to the technical field of fluorite flotation reagents, in particular to a preparation method of a fluorite flotation collecting agent. The specific preparation method comprises the following steps: carrying out sulfonation reaction on sulfuric acid and benzene to obtain sulfonation reaction liquid; the method comprises the following steps: by taking oleic acid or acid oil as a raw material, adding sulfonation reaction liquid at 10-20 DEG C, and carrying out stirring reaction; adding alkali liquor to carry out neutralization reaction, controlling the temperature to be less than or equal to 80 DEG C, and adjusting the pH value to be 7-8; and a water phase is separated and removed, and a mixture containing oleate, sulfated oleate, hydroxyl oleate and stearic acid benzene sulfonate is obtained and serves as the fluorite flotation collecting agent. By controlling the proportion of sulfuric acid to benzene and adding oleic acid, on the basis of reducing product benzene residues, the collecting capacity is improved, good selectivity is achieved, and the problem of aromatic hydrocarbon residues existing in a flotation collecting agent prepared from aromatic hydrocarbons such as benzene as raw materials is solved.

The invention provides a lignin extraction-sulfonic acid modification integrated preparation method based on eutecticevaporate solvent coupling microwaves, lignin sulfonate and application, and belongs to the technical field of oilfield chemistry. The preparation method comprises the following steps: mixing choline chloride, epichlorohydrin and 4-hydroxybenzenesulfonic acid, heating and stirring to obtain a deep eutectic solvent ternary system; the method comprises the following steps: adding biomass powder into a deep eutectic solvent ternary system, and reacting under a microwave condition; after the reaction is completed, filtering, and adjusting the pH value of the obtained filtrate to be neutral to obtain a mixed solution; and then adding an organic solvent into the obtained mixed solution for precipitation, filtering, washing and drying to complete lignin extraction-sulfonic acid modification. According to the method, in-situ grafting of sulfonic acid functional groups is realized in the lignin separation process through the ternary eutectic solvent in combination with microwave-assisted extraction, so that sulfonation modification of lignin is completed. After sulfonation modification, the obtained sulfonated lignin is applied to the drilling fluid, and the viscosity reduction effect can be achieved.

The invention provides a composite film based on a two-dimensional covalent organic framework as well as a preparation method and application of the composite film. The preparation method comprises the following steps: pouring a 2, 4, 6-triformyl phloroglucinol solution into the bottom layer of a container, slowly dropwise adding deionized water as a buffer solution, and dropwise adding a diamine monomer 2, 5-diaminobenzene sulfonic acid solution on the uppermost layer; under a static condition, carrying out a synthetic reaction at room temperature; after the reaction is finished, sucking out the upper-layer nanosheet by using a suction tube, and filling the upper-layer nanosheet into a treated dialysis bag; the synthesized nanosheet is subjected to dialysis treatment in deionized water, a TpPa-SO3H nanosheet is obtained, and a covalent organic framework nanosheet solution is obtained; taking a carbon nanotube, adding an organic solvent, and carrying out ultrasonic dissolution to obtain a carbon nanotube solution; a carbon nanotube solution and a covalent organic framework nanosheet solution are taken to be mixed and subjected to uniform ultrasonic treatment, the mixture is assembled to a nylon membrane through vacuum pressurization, drying is conducted, and the two-dimensional covalent organic framework composite membrane is obtained and has good performance and can be well applied to seawater desalination or dye separation.

The present invention relates to the technical field of metal-organic framework materials, and in particular to a high-performance photocatalytic metal-organic framework (MOF) antibacterial material, a preparation method therefor, and a use thereof. The preparation method comprises: adding p-toluenesulfonic acid, tris(4-aminophenyl)amine, and Cu3L into a polyethylene glycol solution; performing stirring for uniform mixing and then heating for reaction; collecting the resulting precipitate by centrifugation and washing same; and drying the precipitate to obtain GZHMU-2 powder. The GZHMU-2 having a high-performance photocatalytic MOF antibacterial material is synthesized by means of a condensation reaction of an aldehyde and an amine. Under irradiation, the GZHMU-2 can generate active oxygen by means of a photocatalytic effect, thereby achieving an antibacterial effect. The GZHMU-2 has a killing effect on Escherichia coli (EC) and Staphylococcus aureus (SA), and is prepared into an antibacterial film by means of hot pressing. When the antibacterial film is applied to masks, targeted and efficient killing of EC and SA can be achieved, thereby achieving effective protection of persons wearing the masks.

The invention discloses a preparation method of a nanofiber membrane capable of adsorbing various perfluorinated and polyfluoroalkyl substances, which comprises the following steps of: obtaining a nanofiber membrane spun by mixing quaternized chitosan and polyvinyl alcohol by adopting an electrostatic spinning and glutaraldehyde crosslinking method, and directly immersing the nanofiber membrane into environmental water for use; short-chain perfluorocarboxylic acid, long-chain perfluorocarboxylic acid, short-chain perfluorosulfonic acid, long-chain perfluorosulfonic acid and perfluoroalkyl ether carboxylic acid in tap water, surface water, underground water, domestic sewage, industrial sewage, agricultural sewage or medical wastewater can be efficiently and simultaneously adsorbed and removed; various types of perfluoro and polyfluoroalkyl substances such as perfluoro nonoxybenzene sulfonates and chlorinated polyfluoroether sulfonates can be selected from various types of perfluoro and polyfluoroalkyl substances. And after adsorption removal is completed, taking out the wastewater from the environmental water to complete solid-liquid separation. Compared with an existing adsorbent, the adsorbent has the advantages that more types of perfluorinated and polyfluoroalkyl substances can be adsorbed and removed at the same time, the adsorption and removal efficiency on short-chain perfluorinated substances is higher, and the applicable environment water matrix is wider.