940 results about "Solvent system" patented technology

The invention relates to the technical field of organic chemical synthesis, in particular to a preparation method of 3, 4 '-diaminodiphenyl ether.The preparation method comprises the steps that S1, under inert gas and in a first solvent, m-dinitrobenzene and p-acetamidophenol are subjected to a heating reaction under the condition of a weak base catalyst, and 3-nitro-4-acetamido diphenyl ether is prepared; s2, in a second solvent, the 3-nitro-4-acetamido diphenyl ether is subjected to a hydrogenation reduction reaction, and 3-amino-4-acetamido diphenyl ether is prepared; and S3, dissolving the 3-amino-4-acetaminodiphenyl ether in an alcohol solvent system, adding an aqueous solution of alkali, controlling the reaction temperature, carrying out a hydrolysis reaction, and after the reaction is finished, carrying out post-treatment to obtain the 3, 4 '-diaminodiphenyl ether. The preparation method provided by the invention has the advantages of easily available raw materials, low price, good selectivity and high product yield, and is more suitable for industrial production by comprehensively considering economical efficiency and safety.

The invention discloses a composition based on hollow glass beads and a preparation method thereof, and relates to the technical field of material science. The preparation method comprises the following steps: firstly, constructing a pre-composite functional microsphere with a specific hierarchical structure as a core basic functional unit, then matching with a plurality of components such as a thermosetting resin matrix, a latent curing system, a functional synergistic aid package and a composite solvent system, and matching with a preparation process which has a synergistic effect with the components. The composition based on the hollow glass beads is expected to realize uniform dispersion of the hollow glass beads in a coating system and strong bonding of a microscopic interface on the premise of ensuring the structural integrity of the hollow glass beads. Therefore, the high-performance composite coating material with ultra-light weight, high heat insulation efficiency, excellent mechanical strength and long-term service stability is obtained.

The invention discloses preparation of a high-uniformity cerium oxide abrasive material and application of the high-uniformity cerium oxide abrasive material in a chemical mechanical polishing solution. According to a method, cerium nitrate or cerium oxalate is used as a cerium source, a cationic or nonionic surfactant is used as a structure-directing agent, and the high-uniformity cerium oxide abrasive material is prepared in a mixed solvent system formed by water and isopropanol or water and diethylene glycol according to a specific volume ratio. The preparation method comprises the following steps: regulating the particle size and the morphology structure through a solvothermal reaction, carrying out cleaning, drying and high-temperature calcination treatment on a reaction product to obtain sphere-like cerium oxide nano-particles with high particle size concentration ratio, moderate surface roughness and good dispersity, adding cerium oxide powder into deionized water, and carrying out ultrasonic dispersion to obtain the spherical cerium oxide nano-particles. And sequentially adding a dispersing agent and amino acid while stirring, uniformly stirring, fixing the volume, and adding a pH regulator to enable the solution to be weakly acidic, thereby obtaining the chemical mechanical polishing solution. The cerium oxide submicron powder which is different in surface appearance, particle size and distribution uniformity is prepared by adjusting the solvent ratio and other reaction conditions.

The invention discloses a method for extracting and purifying flavone in litsea coreana through an ultrasonic-assisted eutectic solvent, and belongs to the technical field of green processing of natural products. The invention provides a method for efficiently preparing litsea coreana flavone by integrating computer prediction, green solvent extraction and resin purification technologies. The method comprises the following steps: firstly, calculating and screening a deep eutectic solvent system with the highest affinity with the litsea coreana flavone on the basis of a COSMO-RS theoretical model, then coupling the optimized DES with an ultrasonic-assisted extraction (UAE) technology, and through the synergistic effect of the DES and the UAE technology, remarkably improving the extraction rate of the litsea coreana flavone and furthest keeping the biological activity of a target component; then, a macroporous resin dynamic adsorption-desorption purification process is linked, so that high-selectivity enrichment and impurity removal of the flavonoid compounds in the crude extract are realized, a high-purity product is obtained, and a complete process route from intelligent screening, efficient extraction to precise purification is finally formed.

The invention discloses a cellulose coated diaphragm and a preparation method thereof in the field of lithium ion batteries, the diaphragm comprises alpha-cellulose pulp, a cellulose grafted phenylboronic acid-co-oligomeric ethylene oxide copolymer, a thermal response star zwitterionic polymer and nano aluminum oxide, and an N-methylmorpholine-N-oxide aqueous solution is adopted as a solvent system. The preparation method comprises the following steps: firstly synthesizing a cellulose grafted copolymer with dynamic borate bonds through atom transfer radical polymerization, then preparing a star polymer with thermal response arms and zwitter-ion terminals by taking cyclodextrin as a core, and finally mixing all the components to prepare coating slurry. And the composite diaphragm is prepared through the processes of coating, phase conversion, ultraviolet curing and drying. The diaphragm combines the thermal stability and lyophilic property of cellulose, forms a dynamic self-adaptive interface layer through the synergistic effect of two functional compounds, has the advantages of active safety protection, dendritic crystal inhibition, long cycle life and the like, and remarkably improves the comprehensive performance of the lithium ion battery.

The invention relates to the field of organic chemical synthesis, in particular to a synthetic method and application of pyrimidone compounds. The invention provides a synthesis method, reactants are o-amino heterocyclic formamide and triethyl orthoformate respectively, a solvent system is a hexafluoroisopropanol solvent, and a product is a heterocyclic pyrimidone compound. The reaction does not need strong acid or strong alkali conditions, does not need additional reducing agents or oxidizing agents, does not need transition metal catalysis, is economical and practical, the reaction conditions are relatively mild, and the synthesized pyrimidone compound has a good antibacterial effect.

The invention discloses a preparation method of EVOH, and relates to the technical field of EVOH. According to the method, a low-temperature (0-5 DEG C) methanol-n-hexane mixed solvent system is creatively adopted and matched with a penetration enhancer to realize synergistic extraction, so that synchronous and deep removal of polar and non-polar small molecular impurities in the EVA is finally realized, the content of impurities in the EVA is remarkably reduced, and the self-polymerization reaction of residual monomers is effectively inhibited; therefore, a key guarantee is provided for subsequent preparation of high-quality EVOH products. The film processed by the EVOH prepared by the invention has the characteristics of few crystal points and high product quality, and can be applied to the field of high-barrier packaging film materials.

The present invention relates to a process for the manufacture of a water-soluble n-type conductive polymer, the process comprising the steps of: a) adding a monomer to a solvent system comprising water in the presence of a catalyst, thereby providing a reaction solution; b) allowing the monomer to polymerize in the reaction solution, thereby obtaining an n-type conductive polymer solution; and c) performing post-treatment on the n-type conductive polymer solution to obtain the water-soluble n-type conductive polymer.

The invention discloses an electrolyte and a battery. The electrolyte comprises a solvent, a lithium salt and an additive, the solvent comprises acetonitrile and carboxylic ester, the additive comprises a first additive, a second additive and a third additive, the first additive is at least one of phosphate, borate, fluorophosphate and fluoborate with a film-forming potential of 1.3-2V, and the third additive is at least one of lithium salt and fluoborate with a film-forming potential of 1.3-2V. The second additive is at least one of a sulfur-containing additive, a boron-containing additive and a phosphorus-containing additive, and the third additive is a negative electrode film-forming additive; and Y is more than 0.025 and less than 60. According to the invention, a solvent system and an interface film forming mechanism of the electrolyte are synergistically regulated and controlled, so that the core problem of violent side reaction between the acetonitrile-based electrolyte and the negative electrode is solved, and meanwhile, the combination of high energy density and ultrafast charging performance is realized. The electrolyte is suitable for high-energy-density, wide-temperature-range and fast-charging type lithium iron phosphate batteries.

The application discloses a thickened oil viscosity reducer for a main viscosity contribution component of colloid and a preparation method thereof. The thickened oil viscosity reducer comprises the following components in percentage by weight: diethylene glycol methyl ether 25-35%, propylene glycol formate 15-25%, dispersant 5-8%, chelating agent 2-4%, anti-coking agent 0.5-1%, anti-swelling agent 1-2% and corrosion inhibitor 1-2%; and the balance is water. The application is a polar + non-aromatic hydrocarbon solvent system; completely avoids high-risk substances such as nonylphenol polyoxyethylene ether, petroleum sulfonate sodium and organic chlorine; is designed in pertinence and can effectively inhibit metal-induced asphaltene bridging; can withstand working conditions from normal temperature to 250 DEG C and up to 300 DEG C; thermal stability is significantly enhanced, and residual carbon after aging is lower than 8%; viscosity reduction efficiency is higher; the system is more stable, flexible in compounding and suitable for field construction.

The application belongs to the technical field of high polymer materials, and particularly relates to an ion conductive hydrogel, a sensor and a preparation method and application thereof. The ion conductive hydrogel comprises a double-network hydrogel and ion salts and alcohol dispersed in the double-network hydrogel; the first network of the double-network hydrogel is formed by cross-linking of sodium alginate, and the second network is formed by radical polymerization of unsaturated monomers. The second network is formed by radical polymerization of unsaturated monomers, and the double-network hydrogel is formed by cooperation of sodium alginate, so that the ion conductive hydrogel has excellent mechanical properties. The ion salts are added in the double-network hydrogel, and especially, an alcohol / water binary solvent system is introduced. Due to strong ion hydration and strong hydrogen bond interaction between water molecules and alcohol, ice crystallization is inhibited, so that the hydrogel still has good flexibility and conductivity below zero degrees.

Described herein is a topical formulation. The topical formulation includes a thymine-thymine compound including Formula (1) and a solvent system. The topical formulation includes about 0.01 wt% to about 10 wt% of the thymine-thymine compound, based on total weight of the formulation. A method of preparing the topical formulation is also provided.

The invention discloses a preparation process of a moxidectin pouring solution. The preparation process comprises the following steps: S1, respectively preparing a moxidectin initial solution and a thickener premixed solution; s2, the moxidectin initial solution and the thickener premixed solution are stirred and mixed uniformly at the temperature of 25-35 DEG C to form a mixture A, the stirring speed is 150-250 rpm, and the mixing time is 10-20 min; s3, adding auxiliary materials into the mixture A, and uniformly mixing to form a mixture B; s4, supplementing the second solvent into the mixture B to the total amount, uniformly mixing, and filtering to obtain a moxidectin pouring solution; the method comprises the following steps: dissolving a moxidectin raw material in a first solvent to obtain a moxidectin initial solution, and synthesizing the moxidectin raw material by using biological catalysis; the first solvent is a nano-emulsion formed after homogenization. According to the preparation method, the solubility of the medicament, the stability of the preparation and the transdermal drug delivery efficiency are improved by improving the solvent system and controlling the process in the preparation process of the moxidectin pouring solution.

The invention relates to a preparation method of an insect-proof lyocell fiber, and belongs to a functional fiber preparation method in the chemical field. The invention provides a bio-based microcell barrier packaging solution aiming at three major defects of easy breakage, non-environmental response release and toxicity of a chemical cross-linking agent in the existing microcapsule coating. The pH response type microcapsule is constructed through double-layer alternate self-assembly of chitosan and phytic acid, a compact network barrier is formed by electrostatic crosslinking of positive and negative charges, and the structural stability is enhanced by combining a natural cross-linking agent genipin; in the fiber loading stage, plasma pretreatment is adopted to increase the surface roughness, vacuum negative pressure drives microcapsule permeation, and steam setting promotes anchoring setting. Core innovations include an intelligent release mechanism, washability breakthrough, ecological safety and actually measured performance display. The method solves the problem that the lyocell fiber is difficult to decompose the permethrin in the NMMO solvent system, and has the advantages of efficient protection and environmental friendliness.

The invention belongs to the technical field of new energy batteries, and particularly relates to a fluorine-doped graphdiyne material and a preparation method and application thereof. The preparation method of the fluorine-doped graphdiyne material comprises the following steps: in a solvent system, mixing graphdiyne and a solid fluorine source, and drying to obtain a composite precursor; under the protective atmosphere, the composite precursor is annealed, so that the fluorine source is decomposed to release hydrogen fluoride and fluorine free radicals, the hydrogen fluoride or the fluorine free radicals are combined with carbon sites on graphdiyne through nucleophilic substitution, C-F bonds are formed, and the fluorine-doped graphdiyne material is obtained; the mass ratio of graphdiyne to the solid fluorine source is 30: (1-4). The fluorine-doped graphdiyne has the advantages that the defects are increased, the disorder is reduced, and the lithium storage capacity of the graphdiyne is improved, so that the long-term cycle performance and the high-rate performance are improved.

The application belongs to the technical field of deep eutectic solvents, and particularly relates to a ternary deep eutectic solvent and preparation and application thereof. The ternary deep eutectic solvent is composed of choline chloride, 5-sulfosalicylic acid and gamma valerolactone according to a molar ratio of 1:4:(3-25). The strong hydrogen bond network structure between the green solvent system first destroys the ester bond between lignin and hemicellulose, then cuts off the beta-O-4 bond between lignin molecules, so as to separate lignin. Meanwhile, the deep eutectic solvent can improve the stability of carbon cations due to the conjugation effect between the lone pair electrons on the heteroatom oxygen and the central carbon in the molecular structure of gamma valerolactone, so as to inhibit the condensation reaction of lignin.

The invention provides a core-shell type rare earth gradient doped positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: introducing a mixed metal source solution and a first complexing agent into a mixed solvent, carrying out solvothermal reaction to obtain a core precursor, then continuously heating to a first temperature, introducing a rare earth doped source solution, and carrying out solvothermal reaction to obtain a core precursor; continuously raising the temperature to a second temperature for heat preservation, and finally quenching to obtain a precursor material; and mixing and sintering a lithium source and the precursor material to obtain the core-shell type rare earth gradient doped positive electrode material. According to the preparation method, coprecipitation reaction kinetics and a gradient locking process are synchronously regulated and controlled through a mixed solvent system, composition segregation is avoided, lattice distortion is triggered by adopting a solvothermal system, gradient doping of rare earth elements is induced, the interface mutation defect of a traditional core-shell structure is broken through, and the performance of the core-shell structure is improved. And synchronous improvement of high specific capacity and ultra-long cycle life is realized synergistically.

The invention discloses a preparation method of a poly (1, 3-dioxolame)-based composite electrolyte, and belongs to the technical field of sodium ion batteries. The preparation method comprises the following steps: adding a sodium salt and a 1, 3-dioxolame monomer into a solvent, then mixing with an additive to obtain a precursor, and carrying out standing and polymerization curing treatment to obtain the poly (1, 3-dioxolame)-based composite electrolyte. According to the invention, the polymerization curing time of the precursor is greatly shortened by optimizing a solvent system; the additive is introduced into the precursor, the additive comprises a cross-linking agent and / or an inorganic filler, the cross-linking agent is trimethylolpropane triglycidyl ether, and the inorganic filler is NASICON type solid electrolyte powder, so that the ionic conductivity of the poly (1, 3-dioxolame)-based composite electrolyte is effectively improved, and the service life of the poly (1, 3-dioxolame)-based composite electrolyte is prolonged. And the cycling stability and the first-cycle discharge specific capacity of the assembled battery are remarkably improved.

The invention discloses a hollow covalent organic framework fiber separation membrane with a molecular recognition function and a preparation method and application thereof.The method comprises the steps that polylactic acid and aldehyde monomers are added into a solvent A, and an aldehyde-loaded spinning solution is prepared; spinning the aldehyde-loaded spinning solution to obtain an aldehyde fiber precursor membrane; taking the formylated fiber precursor membrane as a template, immersing the formylated fiber precursor membrane into a reaction system consisting of an amino monomer, a catalyst and a solvent B, and initiating dynamic covalent assembly to prepare a COF shell-coated fiber membrane; immersing the fiber membrane coated with the COF shell layer into a solvent C to remove the polylactic acid template so as to prepare hollow COF fibers; and immersing the hollow COF fiber into a solvent system containing a gas recognition functional monomer, and constructing a gas molecule recognition layer on the surface of the hollow COF fiber to prepare the hollow COF fiber separation membrane. According to the application, the hollow covalent organic framework fiber separation membrane is applied to precise recognition operation of sulfur-containing gas. According to the invention, an efficient and energy-saving innovative membrane material with resource enrichment potential can be prepared.

Partially oxidized carbonaceous materials characterized by substantially homogenous, partially oxygenated surfaces thereof are enabled via microwave-assisted methods that are simple and fast. The exemplary methods include combining carbonaceous material(s), at least one mild oxidizer, at least one nucleophile, and an aqueous solvent system to obtain a mixture; and exposing the mixture to microwave radiation for a predetermined time to produce partially oxidized carbonaceous materials. The predetermined time may be in a range from about 5 seconds to about 2 hours, and the power of the microwave energy may be in a range from about 100 w to about 1700 W. The partially oxidized carbonaceous materials are characterized by a homogeneous distribution of oxygen content in surfaces thereof, in nonzero amounts up to about 10 at %, and a standard deviation of surface oxygen content in a range from about 0.1 at % to about 1.0 at %.

The invention relates to the technical field of traditional Chinese medicine compositions, and particularly discloses a uric-acid-reducing medicinal and edible composition containing giant salamander bone polypeptide and a preparation method of the uric-acid-reducing medicinal and edible composition. The uric acid-reducing medicinal and edible composition containing the giant salamander bone polypeptide comprises the giant salamander bone polypeptide and a traditional Chinese medicine compound extract, the traditional Chinese medicine compound extract is prepared by extracting the following raw materials through a dual solvent system of alcohol extraction and water extraction: folium mori, pawpaw, radix puerariae, rhizoma polygonati, rhizoma smilacis glabrae, yam rhizome, semen coicis, mulberry, cortex cinnamomi, endive, astragalus membranaceus, raw endothelium corneum gigeriae galli, fructus lycii, folium cortex eucommiae, rhizoma curcumae longae, agastache rugosus, folium perillae, fructus perillae, agkistrodon halys, semen euryales, Chinese yam, dandelion, mint, jujube, raw liquorice, honey-fried liquorice and pulp of dogwood fruit. The traditional Chinese medicine is prepared from hawthorn, sword bean, white hyacinth bean, plantain herb, dried rehmannia root and prepared rehmannia root. According to the application, the giant salamander bone polypeptide and the traditional Chinese medicine ingredients can play a stable and excellent synergistic effect in the medicinal and edible products, so that the medicinal and edible composition containing the giant salamander bone polypeptide and capable of reducing uric acid, which is relatively good in application quality, is obtained.

The invention belongs to the technical field of high polymer chemistry and composite materials, and particularly relates to a composite proton exchange membrane and a preparation method thereof. The method comprises the following steps: adding an original multi-walled carbon nanotube into a mixed acid solution, and carrying out oxidation treatment to obtain an acidified carbon nanotube; carrying out condensation reaction on the acidified carbon nanotube, a condensing agent and sulfanilic acid in a solvent system to obtain a sulfonated carbon nanotube; dispersing the sulfonated carbon nanotubes in an acetic acid solution to form a dispersion liquid, dissolving chitosan in the acetic acid solution to form a chitosan solution, and mixing the dispersion liquid with the chitosan solution to prepare a membrane casting solution; forming a membrane from the membrane casting solution to obtain an initial composite proton exchange membrane; and placing the initial composite proton exchange membrane in a sulfuric acid solution for crosslinking treatment, washing and drying to obtain the target composite proton exchange membrane. Based on the method, the technical effect of preparing the proton exchange membrane with excellent comprehensive performance is achieved.

The invention discloses a covalent organic framework material, a preparation method thereof and application of the covalent organic framework material in degrading new pollutants in a water body by activating PMS, the covalent organic framework material contains a pyrene group and a bipyridine linking group, has a flat molecular structure and a laminated nanosheet morphology, and has a regular pore structure; the catalyst has a good crystal structure, reliable mechanical strength and excellent thermal chemical stability and catalytic activity, and is an excellent catalyst; and the subsequent modification and metal atom loading sites exist, so that the possibility is provided for further improving the catalytic activity. The bottleneck problems of low crystallinity and poor stability in the traditional preparation process are solved through solvothermal reaction preparation, use of a mixed solvent system and introduction of a weakly acidic solvent, the preparation method is simple, and large-scale production can be realized. The activated PMS degrades new pollutants in the water body; under the condition that the reaction time is 45 minutes, the degradation rate of the BPA can reach 100%.

The invention discloses a cellulose-based polyvinylidene fluoride porous composite piezoelectric material and a preparation method and application thereof, and belongs to the technical field of piezoelectric material preparation. The preparation method of the cellulose-based polyvinylidene fluoride porous composite piezoelectric material provided by the invention comprises the following steps: dissolving cellulose in a pre-cooling solvent system, and carrying out gel treatment to obtain cellulose hydrogel; performing solvent exchange on the cellulose hydrogel, and performing primary freeze drying to obtain cellulose aerogel; and soaking the cellulose aerogel in a PVDF solution, inducing PVDF regeneration treatment by using a non-solvent, and carrying out secondary freeze drying to obtain the cellulose-based polyvinylidene fluoride porous composite piezoelectric material. The composite piezoelectric material prepared by the invention can induce generation of a polyvinylidene fluoride beta crystal phase, so that the piezoelectric property of the composite material is greatly improved, meanwhile, the flexibility is greatly improved, and the composite piezoelectric material has a wide application prospect in flexible piezoelectric sensors.

The invention discloses cold-resistant and tear-resistant coating resin and a preparation method thereof, and relates to the technical field of coatings. The invention discloses cold-resistant and tear-resistant coating resin. The invention relates to a water-based paint, which is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified epoxy resin, 15 to 25 parts of poly (hexanediol adipate), 5 to 10 parts of modified nano silicon dioxide, 8 to 15 parts of diphenylmethane diisocyanate, 3 to 8 parts of trimethylolpropane, 10 to 20 parts of methyl methacrylate, 8 to 15 parts of butyl acrylate, 0.5 to 2 parts of benzoyl peroxide and 0.2 to 0.8 part of dibutyltin dilaurate. The invention relates to an anti-aging coating which comprises the following components in parts by weight: 20-30 parts of a silane coupling agent, 1-3 parts of a silane coupling agent KH-550, 0.3-1 part of an anti-aging agent 264, 5-12 parts of dioctyl phthalate and 20-35 parts of a mixed organic solvent. The raw materials are scientifically proportioned, and the cold resistance and tear resistance of the coating are remarkably improved through the synergistic effect of the modified epoxy resin and the modified nano silicon dioxide; water is strictly controlled in the whole process, side reaction is avoided, and stable resin structure is guaranteed; the preparation steps are clear and definite, the repeatability is high, the solvent system adaptability is good, construction is convenient and fast, and the method is suitable for base material protection in various low-temperature scenes.

The invention discloses a stable supramolecular collagen hyaluronic acid body as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, constructing a supramolecular solvent system by taking betaine as a hydrogen bond receptor and taking polyol / sodium hyaluronate as a hydrogen bond donor, and preparing the stable supramolecular collagen hyaluronate from the supramolecular solvent and lipidosome colostrum prepared from lecithin, cholesterol, ceramide, collagen, polyol and water. According to the invention, collagen and sodium hyaluronate are not in direct contact in space in a form of lipidosome wrapping, the problems that flocculent precipitates are easily generated and the system is unstable when collagen and sodium hyaluronate are commonly used can be solved, and a dual delivery system formed by the supramolecular solvent and lipidosome has excellent human body permeability and efficacy.

The invention discloses a polyarylene ether nitrile nanofiber membrane and a preparation method of the polyarylene ether nitrile nanofiber membrane through double-solvent synergistic electrostatic spinning, and relates to the field of high polymer material preparation. The method comprises the following steps: preparing two electrostatic spinning solutions with obvious volatilization rate and dissolution parameter difference, and alternately depositing two types of fibers on a collecting surface by adopting dual-channel synergistic electrostatic spinning; in the deposition and drying process, chain segments at fiber cross points are induced to swell, mutually diffuse and cure in situ to form bonding points by utilizing the poor evaporation rate of a high / low volatile solvent and the poor solvent-polymer compatibility, so that the self-densification and the structure stabilization of the nanofiber membrane are realized. The obtained nanofiber membrane has high-density in-situ bonding points and remarkably improved mechanical properties, does not need additional post-treatment such as hot pressing or solvent spraying, and is suitable for application such as interlayer reinforcement and interface toughening of composite materials. The process has continuity and controllability, and the density and mechanical properties of the membrane body can be customized by adjusting a solvent system and spinning parameters.

The silk fibroin gel loaded with the polyhydroxy phenolic compound is prepared from the polyhydroxy phenolic compound and silk fibroin in a glycerin-containing solvent system, the concentration of the silk fibroin in the gel is 1.5%-13%, the proportion of glycerin is 35%-55%, and the preferable scheme is that the concentration of the polyhydroxy phenolic compound is not lower than 0.1%. The gel provided by the invention can load high-concentration polyhydroxy phenolic compounds with far over-saturated solubility, and especially has a more remarkable effect on insoluble polyhydroxy phenolic compounds; in terms of efficacy, the gel can complete full-thickness defect skin repair, has the effects of resisting bacteria, resisting infection, preventing adhesion and the like, and can be applied to preparation of a preparation with a wound healing effect. According to the preparation method of the silk fibroin gel loaded with the polyhydroxy phenolic compounds, provided by the invention, the silk fibroin can realize a self-gelling process under the condition that auxiliary materials are not required to be added and external force is applied at a relatively low concentration (1.5-2.5%), and the self-gelling speed can be remarkably accelerated.

The invention discloses an efficient bio-based multifunctional cleaning agent for an agricultural-photovoltaic complementary photovoltaic panel and a preparation method of the efficient bio-based multifunctional cleaning agent, and belongs to the technical field of photovoltaic panel cleaning agents. The cleaning agent is prepared from the following raw materials in percentage by mass: 30 to 50 weight percent of a component A, 30 to 50 weight percent of a component B and 20 to 40 weight percent of a component C, on the basis of the total mass of the cleaning agent, the component A is prepared by mixing 15-30 wt% of a biological enzymolysis complexing agent, 10-20 wt% of nanocellulose gel and 5-10 wt% of a zwitterionic surfactant; the component B is prepared by mixing 10 to 20 weight percent of plant source synergist, 5 to 15 weight percent of nano titanium dioxide and 5 to 15 weight percent of environment-friendly solvent system; the component C is prepared by mixing 10 to 20 weight percent of intelligent response additive and 10 to 20 weight percent of biodegradable slow-release carrier. The intelligent cleaning agent has triple functions of self-cleaning, ecological restoration and intelligent response, and is used for solving the problems of poor environmental protection property, poor low-temperature effect and the like of the existing photovoltaic panel cleaning agent.

The invention relates to the technical field of photocatalytic materials, in particular to a metal single atom loaded defect carbon nitride catalyst and a preparation method and application thereof. The method comprises the following steps: by taking melamine as a nitrogen source, soluble metal salt as a metal source and ethylenediaminetetraacetic acid as a chelating agent, carrying out freeze drying in a solvent system, calcining in a protective atmosphere, and carrying out thermal polymerization, so as to obtain the metal single atom loaded defective carbon nitride catalyst. The metal in the soluble metal salt is copper, iron or manganese. Precise anchoring and high dispersion of metal ions are achieved through complexing of ethylenediamine tetraacetic acid, a stable metal-N coordination structure is formed, metal agglomeration is avoided, a defect structure is constructed synchronously, and the metal monatomic loading capacity is 1 wt.%-7 wt.%. The catalyst can efficiently catalyze and activate peroxymonosulfate and rapidly degrade antibiotic pollutants such as tetracycline, has the advantages of being low in preparation cost, environmentally friendly, high in catalytic activity and high in stability, and is suitable for the field of water pollution remediation.