117 results about "Hydroxyacetic Acids" patented technology

The invention discloses a modified polylactic acid-glycolic acid copolymer composite material scaffold and a preparation method and application thereof, the polylactic acid-glycolic acid copolymer composite material scaffold has a porous structure, pores in the surface and the interior are communicated with each other, and the pore diameter from the surface to the interior is increased in a gradient manner; a metal organic framework material is loaded on the surface of the polylactic acid-glycolic acid copolymer composite material bracket. The printing stent of the modified polylactic acid-glycolic acid copolymer composite material stent has macroscopic macropores and microscopic pores at the same time, so that the surface roughness of the stent can be improved, the purpose of remarkably promoting stent cell adhesion is achieved, the specific surface area of the stent can be remarkably increased, and the stability of the stent is improved. The polylactic acid-glycolic acid copolymer is accelerated to degrade and release more acidic degradation products, so that the degradation of the polydopamine is accelerated, the release of the medicine embedded in the polydopamine is accelerated, and the problem of slow degradation of the polydopamine in vivo and in vitro is solved.

The invention refers to an antimicrobial, exfoliating and seboregulating hydrosoluble composition comprising a combination of diallyl disulphide modified oxide (DDMO) and alpha hydroxyethanoic acid (glycolic acid), which acts removing bacteria affecting the skin including those caused by acne, said composition also provides deep cleansing, exfoliating action, reduces epidermal cohesion facilitating cellular change, preventing the occurrence of several forms of acne in the skin and additionally producing seboregulating effects by avoiding blockage of sebaceous glands.

The invention belongs to the technical field of biomedicine, and particularly relates to an alpha-cyperone bionic nano preparation as well as a preparation method and application thereof, the alpha-cyperone bionic nano preparation is prepared from a polylactic acid-glycolic acid copolymer, alpha-cyperone, a bionic membrane and follicle-stimulating hormone polypeptide, the biomimetic membrane is characterized in that alpha-cyperone is loaded on a polylactic acid-glycolic acid copolymer, the biomimetic membrane is biologically camouflaged on the outer layer, then the biomimetic membrane is modified by follicle-stimulating hormone polypeptide, and the amino acid sequence of the follicle-stimulating hormone polypeptide is as shown in SEQ ID NO.1. According to the alpha-cyperone bionic nano preparation disclosed by the invention, the alpha-cyperone is loaded by utilizing the polylactic acid-glycolic acid copolymer, so that the alpha-cyperone is easily dissolved in water, and the blood circulation half-life period is prolonged and the targeting capability of an ovary part is improved through biological camouflage of the bionic membrane; the modification of the follicle-stimulating hormone polypeptide further improves the targeting ability to granulosa cells, and liver and kidney toxicity and muscle injury are not found in the experiment process.

The invention provides a tracer agent for an oil field and a method for evaluating oil production contribution of each section of a horizontal well, and belongs to the technical field of oil field development. The tracer agent for the oil field, provided by the invention, is prepared from white oil, a nonionic surfactant, 3-allyloxy-2-hydroxy propanesulfonic acid sodium salt and alcohols; wherein the rare earth metal salt, the complexing agent and the sodium 3-allyloxy-2-hydroxy propanesulfonate form a complex; the complexing agent is a mixture of glycolic acid, triethylene tetramine and sodium dimercaptopropanesulfonate in a mass ratio of 10: (3-5): (1-2). The tracer agent for the oil field can stably exist under complex stratum conditions and can resist hypersalinity; in the process of evaluating the oil production contribution of each section of the horizontal well by using the tracer agent for the oil field, different types and different dosages of tracer agents are selected for different layer sections, so that the evaluation of the oil production contribution of each section of the horizontal well can be realized, and an effective basis is provided for subsequent refracturing.

The invention belongs to the technical field of organic synthesis, and provides a preparation method of a cationic lipid compound, which comprises the following steps: (1) reacting 1, 5-dihalopentane, 2-tert-butyl glycolate and alkali to obtain a product G; (2) hydrolyzing the product G under an acidic condition to obtain a product H; (3) carrying out esterification reaction on the product H, the raw material C, 4-dimethylaminopyridine and a condensing agent in dichloromethane to obtain a product J; and (4) carrying out amination reaction on the product J, the raw material L and alkali in acetonitrile to obtain the cationic lipid compound. Compared with the prior art, the method has the relatively remarkable advantages that when the first part of halogenated long-chain alkyl ester H is synthesized by the method, 1, 5-dihalopentane and 2-tert-butyl glycolate are used as raw materials, the halogenated long-chain alkyl ester J is synthesized by a simple method, the product is obtained at a higher yield in synthesis, and the method is suitable for kilogram-level production. The route synthesis only comprises four steps of chemical reactions, and is suitable for industrial production.

The invention discloses a preparation process of an oxidation film on the inner wall of a precise aluminum pipe, which comprises the following steps: step 1, oxidizing the aluminum pipe by adopting a semi-hard anodic oxidation electrolyte and a pulse current with the density of 1.5-2A / dm < 2 > in a bath solution temperature environment of 15-20 DEG C, the semi-hard anodic oxidation electrolyte comprises sulfuric acid with the concentration of 12%-15%, oxalic acid with the concentration of 2%-3% and glycolic acid with the concentration of 0.5%-1%. Step 2, carrying out hole sealing treatment on the oxide film on the inner wall of the aluminum pipe by using a nickel salt-containing medium-temperature hole sealing agent; 3, the aluminum pipe is soaked in methyl phenyl silicone resin, and meanwhile the permeability of the methyl phenyl silicone resin is improved through ultrasonic-assisted permeation; and 4, the aluminum pipe is baked, so that the methyl phenyl silicone resin permeates into the oxidation film on the inner wall of the aluminum pipe to form the composite coating. By adopting semi-hard anodic oxidation, the requirement of 3000 times of friction wear resistance of the selfie telescopic rod can be met, the cost is obviously lower than that of hard anodic oxidation, and mass production is facilitated.

The invention discloses a medical pressure-sensitive adhesive patch based on citric acid, a preparation method and application, the medical pressure-sensitive adhesive patch is composed of an adhesion layer and an anti-adhesion layer, and the thickness ratio of the adhesion layer to the anti-adhesion layer is 1: 1-100: 1; the adhesion layer is obtained by polymerizing a citric acid unit and a polyhydroxy compound unit; the hydrophobic high-molecular polymer is selected from at least one of a polylactic acid-glycolic acid copolymer, polylactic acid, polyurethane and polyether urethane. According to the preparation method, three carboxyl groups in the citric acid not only can be used for esterification reaction with polyhydric alcohols to form a network, but also can provide excellent adhesive force for contact between the adhesive patch and the tissue surface through electrostatic interaction or hydrogen-bond interaction. The anti-sticking layer prepared from the hydrophobic high-molecular polymer can effectively resist invasion of external moisture and bacteria, so that the service time of the adhesive patch is prolonged; meanwhile, the anti-sticking layer can also play a supporting role, so that the mechanical strength of the adhesive tape is improved.

The invention discloses a lumepirone long-acting microsphere sustained-release preparation without a release stagnation period in an early stage, which comprises a lumepirone active ingredient and a medicinal polymer auxiliary material in a mass ratio of (1: 4)-(1: 1), the medicinal polymer auxiliary material is at least one of glycolide-lactide copolymers with the weight-average molecular weight of 5000-150000 Da, and the molar ratio of lactic acid units to glycolic acid units of the glycolide-lactide copolymers is (50: 50)-(95: 5). The lumepirone long-acting microsphere sustained-release preparation without a release arrest phase in the early stage is obtained by specially limiting drying conditions in liquid and medicinal polymer auxiliary materials, the release of the lumepirone long-acting microsphere sustained-release preparation can be maintained for 2 weeks to 1 month without oral administration of the long-acting sustained-release microspheres of lumepirone capsules, the safety and effectiveness of the medicine are met, and the sustained-release preparation is suitable for clinical application. Meanwhile, the problems of early-stage long-time stagnant release and early-stage burst release of the long-acting microsphere preparation can be solved, the compliance can be effectively improved, convenience is provided for patients to the maximum extent, and the economic cost is reduced.

The application belongs to the technical field of pharmaceutical chemistry, and particularly relates to clofazimine-organic acid co-crystals, a preparation method and application thereof. The clofazimine-organic acid co-crystal is one of clofazimine-ferulic acid monohydrate co-crystal, clofazimine-ferulic acid co-crystal, clofazimine-glutaric acid co-crystal, clofazimine-glycolic acid co-crystal (CFZ-GA 1:1), clofazimine-glycolic acid co-crystal (CFZ-GA 1:1.5), clofazimine-salicylic acid co-crystal, clofazimine-L-aspartic acid co-crystal, clofazimine-L-pyroglutamic acid co-crystal, clofazimine-gallic acid co-crystal, clofazimine-succinic acid co-crystal, clofazimine-tartaric acid co-crystal and clofazimine-DL-mandelic acid co-crystal. The clofazimine-organic acid co-crystal provided by the application significantly improves the solubility and fluidity of clofazimine, thereby improving the bioavailability of clofazimine, and has a broad medicinal prospect.

The application relates to the technical field of organic synthesis, in particular to a catalyst, a preparation method thereof and a preparation method of methyl glycolate. The preparation method of the catalyst comprises the following steps: loading a copper salt and a silver salt on a carrier to obtain a catalyst precursor, wherein the material of the carrier comprises silicon dioxide; performing electromagnetic radiation treatment on the catalyst precursor to obtain a modified catalyst precursor; and performing reduction treatment on the modified catalyst precursor, so that the copper salt loaded on the carrier is reduced into elemental copper, and the silver salt loaded on the carrier is reduced into elemental silver. The preparation method can improve the DMO conversion rate and the MG selectivity.

The invention discloses a preparation method of a sodium lauryl glycol carboxylate compound, which comprises the following specific steps: adding 1, 2-epoxydodecane and glycolic acid into a first reaction flask containing a solvent, and carrying out heating reaction under the action of a large-steric-hindrance catalyst to obtain lauryl glycol acetic acid; wherein the solvent is cyclohexane, normal hexane or methylbenzene, and the large steric hindrance catalyst is tri (pentafluorophenyl) borane; and S3, adding the lauryl glycol acetic acid prepared in the step S1 into a second reaction flask containing water, and adjusting the pH value of the solution in the second reaction flask to 8.5-11.5 by using a certain amount of sodium hydroxide solution to prepare lauryl glycol sodium carboxylate, namely the target compound. According to the preparation method disclosed by the invention, the single selectivity of the synthesis process is improved, so that the purity and yield of the sodium lauryl glycol carboxylate compound synthesized by the route are greatly improved, and the product becomes better and better in application.

A PLG copolymer material, called a PLG(p) polymer material adapted for use in a controlled release formulation for a bioactive material is provided, wherein the formulation exhibits a reduced initial burst effect when introduced into the tissue of a patient in need thereof. A method of preparing the PLG copolymer material is also provided, as are methods of use.

The invention relates to the technical field of modified calcium carbonate, in particular to modified calcium carbonate, which comprises the following structures: an inner core: lithium battery recycled calcium carbonate slag, which comprises 1.2-1.8 wt% of Li2CO3 and 0.5-1.2 wt% of MgCO3; the middle layer is a polydopamine (PDA) coating film, the thickness of the polydopamine (PDA) coating film is 50-80 nm, and the polydopamine (PDA) coating film is used for providing active amino (-NH2); the shell is a fluorine-containing silane and polylactic acid-glycolic acid copolymer (PLGA) composite layer, the grafting rate is larger than or equal to 90%, and the molar ratio of lactic acid to glycolic acid of PLGA is 75: 25. Quantized data of performance improvement and dispersibility are as follows: the oil absorption value is 18 ml / 100 g (compared with 28-32 ml / 100 g in the prior art), and the bulk density is 0.25 g / cm < 3 > (loose agglomeration). Functions are as follows: flame retardance: the oxygen index (LOI) reaches 34.5% (no flame retardance exists in the prior art); the antibacterial property is that the Escherichia coli inhibition rate is 99.2% (ASTM E2149 standard), and the environmental protection property is that 2.8 tons of limestone can be reduced for each ton of products, and 1.2 tons of CO2 emission can be reduced.

The present application relates to the technical field of purification, and discloses a dehydrated fiber membrane and a preparation method and application thereof.A dehydrated fiber membrane, wherein the dehydrated fiber membrane comprises a hollow fiber membrane base, a first silane membrane, a first hydrophilic membrane and a first modified membrane are coated on the inner surface of the hollow fiber membrane base from inside to outside, and a second silane membrane, a second hydrophilic membrane and a second modified membrane are coated on the outer surface of the hollow fiber membrane base from inside to outside; the first hydrophilic membrane and the second hydrophilic membrane each independently contain an amide group; the first modified membrane contains a sulfonamide group; and the second modified membrane contains a pyrrole group, a sulfhydryl group and / or a sulfide group.The dehydrated fiber membrane can effectively reduce the content of oligomers in the hydroxyacetic acid dehydration process.

The invention relates to an ultraviolet-resistant polyester protective film and a preparation method thereof, and belongs to the technical field of polymer composite materials. The polyester protective film comprises the following components: 5-8 wt% of a flexibilizer, 3.5-5 wt% of a lubricant, 0.18-0.24 wt% of an antioxidant, 0.32-0.45 wt% of a light stabilizer, 0.4-0.5 wt% of an anti-hydrolysis agent, 2.6-3.3 wt% of an anti-reflection agent and the balance of PET resin, 2-chloroaniline and oxalyl chloride react to form an aryl oxamide compound, namely an intermediate, the intermediate and butyl glycolate are substituted and etherified, and the intermediate and butyl glycolate undergo a reaction to form the PET protective film. A butyl-terminated ester structure is introduced, the polarity matching degree with a PET matrix is high, nanoscale uniform dispersion is achieved in the melting and mixing process, a continuous protection network is formed in the polyester matrix, free radicals are efficiently captured, full-wave-band ultraviolet rays are absorbed, aging and yellowing of the film material under the ultraviolet rays are effectively inhibited, the appearance quality of the film material is remarkably improved, and the service life of the film material is remarkably prolonged.

The invention belongs to the technical field of chemical production, and particularly relates to a process and a system for producing epsilon-caprolactone, 70% hydrogen peroxide is used as an oxidizing agent to oxidize succinic anhydride, reaction can be carried out at normal temperature, reaction conditions are mild, the conversion rate is high, water brought in by reactants is consumed, generated peroxy acid is peroxysuccinic acid, and the epsilon-caprolactone can be produced by using the process and the system. Compared with peracetic acid and peracetic acid used in a traditional process, the stability and safety of peracetic acid and peracetic acid are enhanced, meanwhile, peracetic acid is a solid in a reaction solution and is easy to separate out, dehydration can be well achieved, and in the reaction of cyclohexanone and percarboxylic acid, the yield is high. According to the method, water is introduced into the solution, so that the generation of epsilon-glycolic acid, epsilon-acyloxyhexanoic acid, adipic acid, polycaprolactone and other substances caused by hydrolysis, auto-polymerization or oligomerization of epsilon-caprolactone due to introduction of water is avoided, the yield of epsilon-caprolactone is reduced, meanwhile, the reaction product succinic acid is also a solid in the solution, separation can be realized through filtration, high energy consumption in the rectification separation process is avoided, and the method is suitable for industrial production. The separation and purification difficulty of epsilon-lactone is reduced.

The invention discloses a chemical cleaning reagent for a condenser of a thermal power plant as well as a preparation method and application of the chemical cleaning reagent, and the chemical cleaning reagent is prepared from the following raw materials in percentage by mass: 0.3 to 3 percent of sulfamic acid, 0.1 to 1 percent of nitric acid, 0.2 to 2 percent of glycolic acid, 0.02 to 0.05 percent of sodium erythorbate, 0.1 to 0.2 percent of Lan-826 corrosion inhibitor, 0.2 to 0.4 percent of benzotriazole, 0.02 to 0.05 percent of dialkyl phosphate and the balance of water. The cleaning agent is suitable for cleaning calcium and magnesium scales of the condenser, and the descaling rate can reach 98% or above. In addition, the corrosion inhibitor Lan-826 and benzotriazole are compounded, so that the very low corrosion rate of the heat exchange tube can be realized, and the corrosion rate is less than 0.05 g / (m < 2 >. H).

The application provides a bathroom secondary cleaning agent and relates to the technical field of sanitary products. The bathroom secondary cleaning agent comprises A material and B material. The A material comprises rose-sour powder; the B material comprises, in percentage by mass, 0.1-5% of a hydrophilic group modified polymer, 1-5% of a modified acrylamide polymer, 0.1-2% of glycolic acid, 0.5-3% of a Zanthoxylum bungeanum leaf extract, 0.5-4% of a propoxy compound and the balance of water. The rose-sour extract contains various organic acids, and the organic acids cooperate with the modified acrylamide polymer, the glycolic acid and the propoxy compound in the liquid reagent, so that various components such as scale, oil stains, rust stains and soap stains in the bathroom can be effectively removed, and cleaning is easier. In addition, the cleaning agent is added with the Zanthoxylum bungeanum leaf extract, and has the functions of sterilization and deodorization.

The invention belongs to the field of high polymer materials, particularly relates to a novel high polymer alloy material and a master batch prepared from the novel high polymer alloy material, and further relates to application of the high polymer alloy material and the master batch. The polymer alloy material is a PETX / PBAT blended composition, and PETX is copolyester of ethylene glycol terephthalate and glycolic acid and / or lactic acid. According to the polymer alloy material and the master batch, excellent balance of rigidity and toughness can be achieved, the raw material cost and the process complexity are reduced, the soil moisture preservation performance of the material is improved, and meanwhile the application direction of PET plastic recycling is effectively expanded.

The invention relates to the technical field of sewage treatment, and discloses a high-organic-equivalent liquid-phase composite carbon source and preparation and application thereof, and the composite carbon source comprises the following components in parts by mass: 5-10 parts of polyglycolide, 10-15 parts of glycerol, 10-15 parts of saccharides, 10-15 parts of propylene glycol, 15-25 parts of glycolic acid and 30-40 parts of water. The prepared composite carbon source is high in COD (Chemical Oxygen Demand) organic equivalent, small in molecular weight, green, environment-friendly, non-toxic and harmless, and suitable for microbial absorption. The flammable, combustible, toxic and harmful risks of methanol and ethanol used as a traditional carbon source are avoided, the risk of filamentous bacterium expansion caused by use of glucose is avoided, the problems of single microbial colony variety and poor load resistance caused by a single carbon source are avoided, and low-cost addition and utilization are realized.

The present invention relates to a method and device for extracting butyl glycolate from wastewater. After removing phenol from the wastewater produced by producing phenoxycarboxylic acid pesticides, butyl glycolate is obtained after esterification, concentration and desalination with butanol under acidic conditions. Compared with the existing production technology, it does not directly extract low-concentration glycolic acid, but extracts more valuable butyl glycolate, and does not use any solid heterogeneous catalyst. It not only reduces the recovery cost, does not generate new "three wastes", and improves the recovery rate of butyl glycolate, but also avoids the waste of high-value compounds in wastewater, realizes waste into treasure, and meets the needs of green development.

The invention provides a preparation method for coproduction of hydroxyethyl piperazine and triethylene diamine, which comprises the following steps: by taking dimethyl oxalate directly prepared from coal as a key raw material, carrying out catalytic hydrogenation reduction reaction on the dimethyl oxalate to obtain alpha-methyl glycolate; then the alpha-methyl glycolate and piperazine are subjected to a nucleophilic acyl substitution reaction, and an intermediate product 2-hydroxy-1-(piperazine-1-yl) ethanone is generated; and finally, carrying out hydrogenation reduction on the intermediate product under the action of a catalyst to synchronously obtain target products, namely hydroxyethyl piperazine and triethylene diamine. According to the method, double products of hydroxyethyl piperazine (medicine and dye intermediates) and triethylene diamine (a polyurethane catalyst and a rubber accelerator) are synchronously generated, the total yield of hydroxyethyl piperazine reaches 72% or above, the yield of triethylene diamine reaches 70% or above, the two products are high-added-value fine chemical products, and compared with a single product route, the method has the advantages that the yield is high, and the cost is low. The economic benefit of unit raw materials can be greatly improved, and the resource utilization rate is maximized. The invention belongs to the technical field of organic synthesis.

The invention provides a method for determining the content of polylactic acid and / or a polylactic acid-glycolic acid copolymer. The method comprises the following steps: step 1, preparing a reference solution of the polylactic acid or the polylactic acid-glycolic acid copolymer and a test solution; step 2, detecting the self reference substance solution and the test solution through gel permeation chromatography, wherein the detection chromatographic conditions of the gel permeation chromatography comprise at least one of the following items: (1) the flow rate is 0.3 mL / min-1. 0 mL / min; (2) a detector is a differential refraction detector; (3) the column temperature is 33-40 DEG C; (4) a chromatographic column is a fat-soluble volume exclusion chromatographic column; (5) the mobile phase is tetrahydrofuran or dichloromethane; and step 3, calculating through an external standard method formula to obtain the content of the test solution. The content determination method can accurately determine the content of the polylactic acid and / or the polylactic acid-glycolic acid copolymer, and is simple to operate, convenient to calculate, accurate and rapid.

RENAISSANCE HSP3 - a unique complex of active ingredients providing hydration, regeneration, and skin protection. To achieve the best results in improving the appearance and condition of the skin, an active complex of multi-directional ingredients was designed and created. H - Hyaluronic Acid INCI: Sodium Hyaluronate, Hydrolyzed Hyaluronic Acid P - Peptide INCI: Acetyl Hexapeptide-8 S - Stem Cells INCI: Haberlea Rhodopensis Leaf Extract The combination of the well-researched ingredients described above results in a complex that provides: - Hydration - Anti-wrinkle - Regenerative - Protective - Antioxidant effects The use of this complex in cosmetic products for facial and body care will result in safe and highly effective products.

The invention provides a resourceful treatment method for glycolic acid wastewater, and belongs to the technical field of wastewater resourceful utilization. The method comprises the following steps: carrying out reduced pressure distillation on glycolic acid wastewater, and carrying out solid-liquid separation to obtain a first concentrated solution; adding an organic solvent into the first concentrated solution, carrying out a reflux dehydration reaction, and after the reaction is completed, cooling to room temperature to obtain a second concentrated solution; performing solid-liquid separation on the second concentrated solution to obtain solid salt and organic phase filtrate; and distilling the organic phase filtrate, separating and recovering the organic solvent, and returning to the reflux dehydration step for recycling, thereby obtaining the distillation residue, namely the glycolic acid solution. The method can effectively separate solid salt and glycolic acid, turns waste into wealth, realizes resource utilization of wastewater, and has remarkable environmental, economic and social benefits.

The application belongs to the technical field of cosmetics, and discloses a red fading repair composition, a preparation method thereof and application. The preparation method of the red fading repair composition comprises the following steps: (1) crushing oat kernels, sieving and extracting with pure water to obtain oat kernel extract; (2) adding fresh green beans to a glycerol / water mixed solution containing hydroxyacetic acid, crushing and dispersing with a high-speed homogenizer to obtain a homogenate without particles, and stirring and extracting under low-temperature conditions of 4-10 DEG C to obtain green bean seed extract; and (3) uniformly mixing glycerophosphoinositol choline salt, oat kernel extract and green bean seed extract according to a mass ratio of 0.1-2:10-40:50-80 to obtain the red fading repair composition. The red fading repair composition of the application uses green bean seed extract prepared by a specific process as a main raw material, and can achieve a significantly improved red fading repair effect through the synergistic effect of oat kernel extract and GPI.

This invention provides a copper etching solution, its preparation method, etching method, and application. The copper etching solution comprises 1-30 parts cerium ammonium sulfate, 0-20 parts inorganic acid, 0-20 parts organic acid, and 0-90 parts water. The inorganic acid includes one or more of sulfuric acid, phosphoric acid, hypochlorous acid, chloric acid, boric acid, carbonic acid, nitric acid, nitrous acid, and hydrochloric acid. The organic acid includes one or more of citric acid, acetic acid, tartaric acid, malic acid, formic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, isovaleric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, glycolic acid, acrylic acid, methacrylic acid, lactic acid, gluconic acid, maleic acid, benzoic acid, and salicylic acid. The copper etching solution of this invention exhibits good etching properties for copper and minimal damage to nickel-chromium alloys.

This invention relates to the field of coating technology, specifically to a printing coating for colored paper and its preparation method. In the preparation process, this invention incorporates dithiol dihydroxyacetic acid to increase the crosslinking points of the system, and trimethylolpropane tris(2-methyl-1-azacyclopropane propionate) containing an unstable aziridine three-membered ring to improve the degree of crosslinking. It also introduces isoborneol methacrylate to reduce internal stress, effectively balancing the crosslinking density and volume shrinkage of the system, resulting in a coating with excellent adhesion. Furthermore, this invention adds the bifunctional monomer 1,6-hexanediol diacrylate to make the network structure more uniform and provide anti-photooxidation properties, making the system less prone to oxidative discoloration. The addition of tripropylene glycol diacrylate reduces the risk of yellowing caused by small molecule migration. Therefore, the coating obtained in this way has significant anti-yellowing effects, preventing color distortion of colored paper and maintaining the appearance stability of the colored paper.

The invention relates to a regeneration method of a vanadium redox flow battery electrolyte, and the method comprises the following steps: carrying out reduction treatment on a to-be-treated electrolyte through a reducing agent so as to adjust the valence state of vanadium ions in the to-be-treated electrolyte; the reducing agent comprises one, two or more of acid compounds and carbohydrate compounds, the acid compounds comprise oxalic acid, acetic acid, glycolic acid, formic acid, citric acid and maleic acid, and the carbohydrate compounds comprise glucose, fructose, galactose, lactose, maltose, sucrose and cellulose. According to the regeneration method of the vanadium redox flow battery electrolyte, the reducing agent is introduced to perform reduction treatment on the vanadium ions in the electrolyte, so that the effective recovery of the battery capacity can be realized.

The invention provides sprayed concrete and a preparation method thereof, and belongs to the field of sprayed concrete.The sprayed concrete is prepared from, by weight, 20-35 parts of gel material, 20-30 parts of fine aggregate, 15-25 parts of coarse aggregate, 1-3 parts of polyvinyl butyral, 0.5-2 parts of glycolic acid and 13-16 parts of water. According to the invention, polyvinyl butyral and glycolic acid are added into the concrete as modified components, and the polyvinyl butyral and glycolic acid are subjected to a copolymerization reaction to form a copolymer, so that the adhesiveness of the concrete is remarkably enhanced; the dispersity of the copolymer in the concrete is better, and the overall mechanical property of the concrete is improved; and a cross-linked structure formed by copolymer reaction improves the mechanical strength and durability of the copolymer.