63 results about "Mercaptoacetic acid" patented technology

The invention discloses a sodium alginate embedded iron-carbon microcapsule material for repairing cadmium and arsenic polluted soil and a preparation method of the sodium alginate embedded iron-carbon microcapsule material, and belongs to the technical field of soil heavy metal pollution repairing materials. The material comprises straw biochar, high-iron steel slag powder, a sulfydryl acetylated chitosan-iron monatomic cluster compound, a boron-doped graphitized carbon coated cobalt ferrite nanosheet, sodium alginate, calcium chloride and sodium carbonate. Wherein the sulfydryl acetylated chitosan is prepared by reacting chitosan with sulfydryl acetic anhydride, dialyzing and drying, and performing solvothermal reaction with ferric nitrate under high pressure. The preparation method comprises the following steps: pyrolyzing and drying the straw biochar, reacting the high-iron steel slag with sulfuric acid, adding the biochar, adjusting the pH value, adding sodium carbonate, mixing to obtain an iron-carbon-based passivation material, mixing with two modified compounds, mixing with a sodium alginate solution, dropwise adding a calcium chloride solution, and stirring and curing. The material can be applied to remediation of cadmium and arsenic polluted soil.

The application discloses a high viscosity-reducing polycarboxylic water reducing agent for ultra-high performance concrete and a preparation method thereof, and comprises the following steps: adding a metered amount of deionized water into a reaction container, and then adding a methyl allyl polyoxyethylene ether, sodium methallyl sulfonate, an alkyl acrylate, and styrene into the reaction container, stirring, and heating; adding a metered amount of hydrogen peroxide, and simultaneously dropping a mixed aqueous solution of acrylic acid AA and methoxy polyethylene glycol methacrylate MAA-MPEG and a mixed aqueous solution of mercaptoacetic acid and ascorbic acid; and after dropping, keeping warm. The prepared polycarboxylic water reducing agent can improve the dispersibility of the polycarboxylic water reducing agent, reduce the hydrophilicity of the whole polycarboxylic molecule, and obviously reduce the viscosity of concrete; under the premise that the concrete has good workability, the viscosity of high-grade concrete can be obviously reduced; the polycarboxylic water reducing agent has good adaptability to different types of cement, avoids the need to seek different types and structures of water reducing agents for different types of cement, and is beneficial to practical engineering application.

The invention relates to the technical field of high polymer materials, and particularly discloses a high-strength polyurethane adhesive as well as a preparation method and application thereof. The adhesive is prepared by compounding a double-bond-terminated polyurethane prepolymer monomer and a multi-sulfydryl cross-linking agent. And the prepolymer monomer is synthesized by reacting 4, 4-diisocyanate dicyclohexylmethane and hydroxyethyl (meth) acrylate according to a molar ratio of 1: 2. The polythiol cross-linking agent is tetrakis (3-mercaptopropionic acid) pentaerythritol ester or tetrakis (2-mercaptoacetic acid) pentaerythritol ester. When in use, the two components are mixed and then coated on a base material, and the mixture is cured at 30-100 DEG C for 0.5-5 hours. The adhesive disclosed by the invention forms a compact network through multiple crosslinking mechanisms such as sulfydryl-alkene Michael addition, so that the adhesive has extremely high shear strength (up to more than 30MPa) and excellent heat resistance and aging resistance on metal, glass, glass fiber plates and the like.

This invention belongs to the field of analytical detection technology and relates to a method for detecting estradiol using a combination of organometallic framework enrichment and enzyme-linked immunosorbent assay (ELISA). A magnetic organometallic framework solid-phase extractant is used to enrich estradiol in the sample, followed by detection of the enriched estradiol using ELISA. The magnetic organometallic framework solid-phase extractant is prepared by subjecting mercaptoacetic acid-modified Fe3O4 particles, zirconium salt, and 2-amino-terephthalic acid to a solvothermal reaction at 110–130°C for 22–26 hours. The detection method provided by this invention has advantages such as short detection time, high sensitivity, good specificity, and high accuracy, thereby enabling the detection of trace amounts of estradiol in environmental water samples.

The invention provides a method for extracting sodium thioglycollate from ethionine ester synthesis wastewater, which comprises the steps of wastewater pH regulation, extraction, washing, reverse extraction and evaporation concentration, and is mainly applied to recovery of by-product sodium thioglycollate in ethionine ester production wastewater. The method can be used for deep separation of sodium thioglycolate and other impurity inorganic salts such as sodium chloride and sodium carbonate in other systems, can be used for extraction of sodium thioglycolate under a weak acidic condition, and does not have the problems of easy volatilization and high toxicity.

The invention discloses an industrial production method of a quinoline mercaptoacetic acid sulfonamide compound, which comprises the following steps: carrying out condensation reaction on an intermediate D-3 and methyl sulfonamide under the action of a condensing agent, concentrating under reduced pressure until no liquid flows out after the reaction is finished, adding acid, separating out a large amount of solid, filtering, pulping a filter cake with purified water, filtering and drying to obtain the quinoline mercaptoacetic acid sulfonamide compound. A compound D is obtained. The problems that in the prior art, the reaction yield is low, starting material impurities are contained, and the process is complex are solved, and the prepared compound D is low in cost, simple in process operation, high in yield, stable in quality and suitable for large-scale industrial production.

The application discloses a combined depressor for recovering scheelite from ultra-low-grade tungsten-molybdenum associated ore and a method, the combined depressor comprising sodium humate, sodium mercaptoacetate, ammonium citrate, sodium pyrophosphate, sodium fluosilicate and lead nitrate, and the six kinds of substances are configured into the combined depressor in a proportion of 1:1:(2-5):(1-5):(1-3):(2-5). The application aims at recovering scheelite from low-grade refractory ore, improves the separation effect of scheelite and gangue minerals, improves the scheelite recovery rate and the concentrate grade, and improves the economic benefit.

The invention provides an agent composition for improving the recovery rate of copper, nickel, iridium and rhodium in copper-nickel symbiotic sulfide ore, and the agent composition comprises the following raw materials in parts by mass: 85-90 parts of sodium diethyldithiocarbamate, 1-10 parts of mercaptoacetic acid-2-naphthylamine, 1-5 parts of furanformyl dioxime and 1-10 parts of dialkyl dithio-oxadiamide. The invention also provides a use method of the medicament composition. The use method comprises the step of adding the sodium diethyldithiocarbamate, the mercaptoacetic acid-2-naphthylamine, the furanformyl dioxime and the dialkyl dithio-oxadiamide at different time. The raw materials of the medicament provided by the invention are synergistically used, and recovery of independent iridium and rhodium minerals and iridium and rhodium minerals closely linked with (or wrapped by fine nickel sulfide and copper) fine nickel sulfide and copper in ores is considered.

The present application provides, in one embodiment, a cleaning method which is excellent in resin mask removal, and which can suppress corrosion and discoloration of copper. The present application relates, in one embodiment, to a cleaning method of a substrate, which includes a step of peeling a resin mask from a substrate having a copper-containing metal layer and the resin mask on a surface, using a cleaning agent composition containing an alkali agent (component A), an ammonium ion (NH4 + , component B), mercaptoacetic acid (component C), and water (component D), and the molar ratio (B / C) of component B to component C is 1.5 or more.

The invention belongs to the technical field of building material admixtures and relates to a water-reducing hydrated calcium silicate composite early strength agent as well as a preparation method and application thereof. Wherein the polycarboxylic acid water reducer comprises the following components: acrylic acid, methallyl alcohol polyoxyethylene ether, mercaptoacetic acid and 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone, and the molar ratio of the acrylic acid to the methallyl alcohol polyoxyethylene ether is (5-7): 1; the mercaptoacetic acid accounts for 0.8%-1.6% of the total mole number of the acrylic acid, and the 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone accounts for 0.84%-0.85% of the total mole number of the methallyl alcohol polyoxyethylene ether. According to the invention, the molecular structure of PCE is accurately designed, and PCE is used as a key regulating agent to actively regulate the nucleation process of C-S-H and the steric hindrance effect among particles, so that the aggregation tendency of the particles is inhibited, the small particle size of the product is ensured, and the long-term dispersion stability is given to the product.

The invention discloses a preparation method of a viscosity-reducing admixture based on machine-made sand concrete, and belongs to the technical field of energy conservation and environmental protection. The method comprises the following steps: adding silicon dioxide sol into a mixed solvent, adjusting the pH value, adding 3-(methylacryloyloxy) propyltrimethoxysilane, and carrying out a heating reaction to obtain a dispersion liquid; the preparation method comprises the following steps: mixing acrylic acid, methoxy polyethylene glycol methacrylate, 2-acrylamide-2-methylpropanesulfonic acid, 2-(methylacryloyloxy) ethyl dimethyl (3-sulfopropyl) ammonium inner salt and deionized water, adjusting the pH value, and adding ammonium persulfate for polymerization to obtain a first mother solution; adding the dispersion liquid and mercaptoacetic acid into the first mother solution, adding heptadecafluorodecyl trimethoxysilane, and heating to obtain a second mother solution; through a multi-scale composite strategy, interface lubrication and dispersion stability are realized, the viscosity of the machine-made sand concrete is remarkably reduced, the pumpability and compatibility are improved, and energy conservation and environmental protection are considered.

The invention discloses a composite adsorption material for synergistically removing ammonia gas and sulfide in a pet environment and a preparation method of the composite adsorption material, and belongs to the technical field of environment functional materials and gas purification. According to the composite adsorption material, zeolite and attapulgite are used as a porous inorganic matrix, an interface adhesion layer is constructed on the surface of the porous inorganic matrix through dopamine oxidation auto-agglutination, histidine-iron coordination is introduced to form enzyme-like active sites, meanwhile, a reversible sulfur capture structure is constructed through mercaptoacetic acid, a proton transfer network is constructed through phytic acid, and the porous matrix is subjected to synergistic modification; on the basis, zinc chloride, ferric nitrate, sodium carboxymethyl cellulose and polyvinyl alcohol are combined to prepare the composite adsorption material. According to the invention, by constructing a multi-stage synergistic system of bionic enzyme active sites, a dynamic sulfur capture structure and a proton transfer network, efficient synergistic removal of ammonia gas and hydrogen sulfide is realized, the stability and recycling performance of the material in a high-humidity environment are remarkably improved, and the material has a good application prospect.

The invention discloses a preparation method of an enhanced warp-knitted lace fabric, and aims to solve the problems that fibers such as cotton fibers with relatively high water absorption capacity do not have a quick-drying characteristic, have poor antibacterial performance after long-term retention of water, still go mouldy and stink, and are low in skin-friendly property. According to the technical scheme, the method is characterized by comprising the following steps that S1, spandex filaments are stretched to a certain drafting length, then nylon filaments are evenly wound on the outer surfaces of the stretched spandex filaments according to a certain twist degree, and the nylon elastic covering yarn is obtained. The antibacterial acarus killing layer is made of cotton fibers with high water absorption, and treatment is conducted through composite alkali liquor, alkali liquor, a mercaptoacetic acid solution and a silver nitrate solution in sequence in the preparation process, so that antibacterial substances can be stably embedded into the fibers instead of being only attached to the surface layers of the fibers, and the antibacterial acarus killing effect is achieved. Furthermore, good antibacterial performance can be kept in the states of multiple times of water washing and long-term soaking.

The invention discloses a method for preparing ammonium thioglycolate from thionocarbamate production waste liquid, which comprises the following steps: 1) adding acid into the thionocarbamate production waste liquid to obtain a solution containing thioglycolic acid; (2) extracting the solution containing mercaptoacetic acid by adopting an extracting agent to obtain an extracting solution containing mercaptoacetic acid; the extraction agent comprises an amine extraction agent; and (3) carrying out back extraction on the extracting solution containing mercaptoacetic acid by adopting ammonia water, so as to obtain a back extraction solution containing ammonium mercaptoacetate. According to the method, ammonium thioglycolate is prepared from the thionocarbamate waste liquid, so that the problem of recycling the sodium thioglycolate waste water generated in the thionocarbamate production process is solved, and ammonium thioglycolate with relatively high economic value is obtained. In addition, the extraction process in the method can also realize separation of sodium salt and other organic impurities in the wastewater containing sodium thioglycollate.

This invention relates to the field of mineral processing flotation reagents, specifically disclosing a high-efficiency collector for the flotation of sphalerite and its preparation method. The high-efficiency collector provided by this invention achieves synergistic enhancement of the functions of each component by compounding isopropyl xanthate, dialkyl dithiocarbamate, and mercaptoacetate, and introducing a designed and synthesized polymeric synergist. The three basic collector components together constitute a dense and stable primary hydrophobic adsorption layer. The introduced synergist, on the one hand, enhances the adsorption strength and selectivity on the surface of sphalerite through multiple functional groups; on the other hand, its grafted hydrophilic polymer chains can form steric hindrance at the mineral-water interface and regulate local hydrophilicity and hydrophobicity, thereby further optimizing the hydrophobic state of the mineral surface and inhibiting gangue inclusions. The composite reagent provided by this invention improves the recovery rate of useful minerals while ensuring concentrate quality.

The invention relates to the technical field of photoelectric materials, in particular to a perovskite thin film material and a preparation method thereof. The thin film material comprises a conductive substrate and a narrow-band-gap perovskite layer, an intermediate interface modification layer and a wide-band-gap perovskite layer which are sequentially coated on the conductive substrate from bottom to top, the chemical general formula of the narrow-band-gap layer is MAmFAnPb1-cGecI3-gamma Br gamma, the chemical general formula of the wide-band-gap layer is FAxCsyPb1-aMaI3-beta Br beta, and the intermediate interface modification layer is formed by compounding mercaptoacetic acid and nano titanium dioxide. According to the material, through the synergistic effect of lamination band gap complementation, ion doping and composite interface modification, 400-1100 nm wide spectrum efficient absorption is achieved, the defect state density is remarkably reduced, the photoelectric conversion efficiency and the long-term stability are improved, and a key technical support is provided for perovskite solar cell industrialization.

This invention relates to the field of surface engineering technology, specifically to a low-temperature, rapid-curing microwave absorbing coating and its preparation method. The microwave absorbing coating, by mass percentage, comprises 20-80 wt% microwave absorbing agent, 20-80 wt% epoxy resin, 10-50 wt% diluent, and 2-7 wt% epoxy resin-modified polythiol. The preparation method includes the following steps: mixing the microwave absorbing agent, epoxy resin, and diluent in the specified mass percentages to obtain a mixed slurry; mixing pentaerythritol, mercaptoacetic acid, p-toluenesulfonic acid, and toluene and performing an esterification reaction; mixing the resulting polythiol with bisphenol A type epoxy resin to obtain epoxy resin-modified polythiol; mixing the epoxy resin-modified polythiol with the mixed slurry to obtain a microwave absorbing coating; spraying the microwave absorbing coating onto a substrate; and curing to obtain the microwave absorbing coating. The purpose of this low-temperature, rapid-curing microwave absorbing coating and its preparation method is to solve the problems of slow curing speed and poor environmental performance of microwave absorbing coatings at low temperatures.

The application relates to a perovskite solar cell based on a tin oxide electronic transmission layer prepared by a chemical bath deposition method and a preparation method thereof. The cell is composed of an Au electrode, a spiro-OMeTAD hole transmission layer, a perovskite light absorption layer, a SnO2 electronic transmission layer and an FTO substrate from top to bottom. Mercaptoacetic acid TGA as a complexing agent in a traditional process is replaced by a strong action between citric acid and tin oxide, an effect of improving the tin oxide interface is achieved, and the tin oxide layer has better electronic transmission capacity. The solar cell improves the open circuit voltage of the perovskite solar cell device, thereby improving the device performance.

The present application belongs to the technical field of corrugated paperboard, and the water-resistant raw paper is prepared by beating wood fibers and modified bamboo fibers prepared by reacting allyl bamboo fibers, 1,4-butanediol di(mercaptoacetate) and magnolol, adding biodegradable water-resistant additives for hydrophobic modification, and then shaping; finally, the face paper layer, the corrugated core paper layer and the inner paper layer are prepared from the water-resistant raw paper, and the corrugated paperboard is prepared by bonding and pressing. The magnolol groups grafted on the surface of the modified bamboo fibers can improve the water absorption performance of the fibers, and the synergistic effect with the biodegradable water-resistant additives can improve the hydrophobic performance of the corrugated paperboard; the surface inlaying carboxylated nanocellulose structure of the biodegradable water-resistant additives has anti-deformation performance; the epoxy soybean oil as the core part has excellent hydrophobic performance; the hydrogen bond between the polyphenol structure of tannic acid and the fibers of the water-resistant raw paper can improve the mechanical performance of the corrugated paperboard, so that the corrugated paperboard has excellent biodegradability, hydrophobicity and mechanical strength.

A polymer comprising chain transfer agent residues and a polymeric monomer is provided. The monomer may comprise (meth / ethyl / propyl)acrylamide or a derivative thereof; (meth / ethyl / propyl)acrylic acid or an acidic derivative thereof; C1-C18 alkyl (meth / ethyl / propyl)acrylate; hydroxyl-functionalized C1-C18 alkyl (meth / ethyl / propyl)acrylate, or combinations thereof. The chain transfer agent may be water-compatible. The chain transfer agent may comprise homocysteine ​​or a derivative thereof; C2-C18 monothiols and dithiols; C3-C12 ethylene glycol monothiols and dithiols; mercaptoacetic acid or a derivative thereof; or similar substances; or combinations thereof. At least one polymer terminus of the polymer may comprise a chain transfer agent residue. The connection between the polymer terminus and the chain transfer agent residue may comprise a sulfur atom. A method for preparing such a polymer is also provided.

This invention discloses a wash-resistant color-fixing emulsion, its preparation method, and its application. By mass, the raw materials for preparing this wash-resistant color-fixing emulsion include 3-8 parts of a vinyl-containing polyurethane prepolymer, 1-4 parts of carboxyl-modified silicone oil, 0.5-2 parts of a crosslinking agent, 0.8-2.5 parts of an emulsifier, 0.1-0.5 parts of a neutralizing agent, 0.004-0.024 parts of an initiator, and 80-95 parts of deionized water. The vinyl-containing polyurethane prepolymer is first prepared by reacting hydroxyl-terminated polyether silicone oil with a diisocyanate compound, and then reacted with hydroxyethyl acrylate. The carboxyl-modified silicone oil is prepared by reacting vinyl-terminated silicone oil with mercaptoacetic acid. Because the raw materials for preparing the wash-resistant color-fixing emulsion of this invention contain both the vinyl-containing polyurethane prepolymer and the carboxyl-modified silicone oil, they can form an interpenetrating network-ion trap structure through simultaneous crosslinking and molecular entanglement, imparting excellent hand feel, wash fastness, and rubbing fastness to fabrics.

The application discloses a synthesis method of azanirmite raw medicine, and relates to the technical field of medicine synthesis. The synthesis method of the azanirmite raw medicine comprises the following synthesis steps: S1, a nucleophilic substitution reaction of 2,6-dichloropyridazine and mercaptoacetic acid is carried out to obtain 2-((6-chloropyridazine-3-yl)thio)acetic acid; and S2, an amide condensation reaction of 2-((6-chloropyridazine-3-yl)thio)acetic acid and diethylamine is carried out to obtain azanirmite. The azanirmite raw medicine can be synthesized through two-step reactions, and has the advantages of easy-to-obtain raw materials, mild reaction conditions, simple operation, high product yield and high purity, and is suitable for industrialized production of the azanirmite raw medicine.

The application belongs to the technical field of organic compound synthesis and medicine, and particularly relates to a preparation method of thienopyrimidine mercaptoacetic acid compounds and salts thereof. The method uses an organic base as an acid binding agent, and condenses a mercapto intermediate and 2-bromoacetic acid in an organic solvent to obtain the thienopyrimidine mercaptoacetic acid compound. The compound is reacted with an aqueous base solution in alcohol to form a salt. After the reaction is completed, the solvent is evaporated, acetone is added for pulping, filtration is performed, and drying is performed. The method has mild reaction conditions, simple operation, and high product purity and yield, and is suitable for industrial production.

The invention belongs to the field of functional polymers, and particularly relates to a detachable epoxy vitrimer-based potting electrical component adaptive to a wide temperature range. The invention relates to an epoxy vitrimer resin, which is composed of isocyanuric acid tris [2-(3-mercaptopropionyloxy) ethyl ester], trimethylolpropane tris (3-mercaptopropionate), pentaerythritol tetra (mercaptoacetic acid) ester, tetrahydrophthalic acid diglycidyl ester, bisphenol A diglycidyl ether, and dithio diphenyl diglycidyl ether, and the preparation method of the epoxy vitrimer resin comprises the following steps: mixing the epoxy vitrimer resin, the trimethylolpropane tris (3-mercaptopropionate), the pentaerythritol tetra (mercaptoacetic acid) ester, the tetrahydrophthalic acid diglycidyl ester, the bisphenol A diglycidyl ether and the dithio diphenyl diglycidyl ether; and after the electrical component represented by the high-voltage electrical component is encapsulated, the curing reaction is performed for more than 6 hours at the room temperature of 100 DEG C below zero. After complete curing, the epoxy vitrimer-based potting electrical component has wide temperature range adaptability, and meanwhile, selective complete disassembly and repotting can be realized in a specific sulfydryl or alkaline solution.

The application discloses a high-sulfur stibnite flotation separation process, a combined inhibitor and application, and the combined inhibitor is composed of sodium mercaptoacetate and carboxymethyl cellulose with a mass ratio of (0.1-0.3):1. The application adopts step-by-step inhibition, and different inhibitors are used in roughing and cleaning, so that the grade and recovery rate of antimony concentrate can be ensured, and the recovery of pyrite in subsequent operation and the S content in subsequent beneficiation products can also be ensured. The combined inhibitor has the advantages of strong effect, strong adaptability, strong stability and small dosage, and can realize efficient flotation separation of stibnite and pyrite and realize recovery and utilization of stibnite and pyrite.

The invention relates to a high-viscosity organic sludge dehydrating agent and a preparation method thereof, and belongs to the technical field of sludge treatment. The dehydrating agent is prepared by taking enzymatic hydrolysis lignin as a matrix, introducing a hydrophilic chain segment containing an ether structure and a carboxyl end group with a chelation effect through a ring-opening reaction of allyl glycidyl ether and a sulfydryl-alkene click reaction of mercaptoacetic acid in sequence, and then impregnating and loading ferrous ions with a ferrite solution. The dehydrating agent is matched with hydrogen peroxide for use, colloid stability is destroyed through electrostatic interaction of loaded ferrous ions and extracellular polymeric substances, meanwhile, Fenton reaction is catalyzed to oxidize and degrade the extracellular polymeric substances, a lignin skeleton adsorbs flocculated and cracked particles, and deep dehydration of sludge is achieved through cooperation of the three.

This invention relates to the field of mineral processing technology, specifically to an inhibitor and method for deactivating and inhibiting the flotation recovery of copper sulfide ore in copper-lead mixed flotation concentrate. The inhibitor for deactivating and inhibiting the flotation recovery of copper sulfide ore in copper-lead mixed flotation concentrate of this invention is composed of 2,5-dimercapto-1,3,4-thiadiazole and sodium mercaptoacetate. This invention utilizes the competitive desorption of residual xanthate on the surface of copper sulfide minerals and the precipitation removal of unavoidable ions in the pulp by 2,5-dimercapto-1,3,4-thiadiazole, synergistically with the selective hydrophilic inhibition of the copper sulfide ore surface by sodium mercaptoacetate. By sequentially adding the combined inhibitor, collector, and frother during the roughing and scavenging stages, a synergistic separation mechanism of "deactivation first, inhibition later" is constructed. This not only solves the problem of difficult removal of residual xanthate and collector adsorption on the surface of copper sulfide minerals after mixed flotation and the difficulty in effective action of subsequent inhibitors, but also overcomes the defects of insufficient selectivity and limited separation efficiency of single inhibitors.

The invention discloses a responsive nano-enzyme for delivering KGN and a preparation method and application thereof, and the preparation method comprises the following steps: suspending zinc chloride and cerium nitrate in an N, N-dimethylformamide solution, and suspending meso-tetra (4-carboxyphenyl) porphin in the N, N-dimethylformamide solution; adding a proper amount of glacial acetic acid; the preparation method comprises the following steps: dissolving tannic acid in an N, N-dimethylformamide solution, and dissolving meso-tetra (4-carboxyl phenyl) porphin in the N, N-dimethylformamide solution to obtain meso-tetra (4-carboxyl phenyl) porphin-Zn < 2 + >-Ce < 3 + >; the preparation method comprises the following steps: adding modified mercaptoacetic acid-meso-tetra (4-carboxyl phenyl) porphin-Zn < 2 + >-Ce < 3 + > and cysteine modified CAP bone targeting peptide into triethylamine, and reacting to obtain meso-tetra (4-carboxyl phenyl) porphin-Zn < 2 + >-Ce < 3 + >-tannic acid-coated CAP peptide with targeting property; the preparation method comprises the following steps: dissolving KGN in dimethyl sulfoxide, diluting, and adding into an N, N-dimethylformamide solution of SH-TCPP-Zn < 2 + >-Ce < 3 + > (at) TA to obtain the sulfydryl-tetra (4-carboxylphenyl) porphin-Zn < 2 + >-Ce < 3 + > (at) tannic acid (at) KGN(at) CAP peptide. The invention relates to a biodegradable nano particle with a cartilage targeting function.

This invention relates to the field of polymer materials technology, and particularly to a high-adhesion modified polyaniline composite material and its preparation method, comprising the following steps: (1) washing glass fibers with acetone to obtain pretreated glass fibers; (2) preparing a silane hydrolysate; (3) immersing the pretreated glass fibers in the silane hydrolysate to obtain mercapto-modified glass fibers; (4) preparing compound (I) of formula I using mercaptoacetic acid and aniline as the starting point for synthesis; (5) preparing modified polyaniline by combining the compound of formula I with p-phenylenediamine and aniline; (6) crosslinking the mercapto-modified glass fibers and modified polyaniline through disulfide bonds to obtain the modified polyaniline composite material. The modified polyaniline composite material of this invention has good adhesion, resistance to damp heat, impact resistance, electrical conductivity, and self-healing ability.

This invention relates to the field of wastewater treatment technology and discloses a water purification agent for wastewater pollution and its preparation method, comprising the following steps: adding a polyvinyl alcohol solution to a chitosan solution and stirring to mix, then adding modified plant skin, stirring at room temperature for 20-30 minutes to obtain the water purification agent for wastewater pollution; the modified plant skin is prepared by adding a long-chain carboxyl intermediate and mercaptoacetic acid to an anhydrous ethanol solution, then adding pretreated plant skin, soaking, and stirring to obtain the modified plant skin. This invention achieves the synergistic removal of multiple pollutants in wastewater through the design of a composite system of "chitosan-polyvinyl alcohol-modified plant skin": after modification with a long-chain carboxyl intermediate and mercaptoacetic acid, the modified plant skin introduces a large number of active adsorption sites such as carboxyl groups (-COOH) and mercapto groups (-SH) on its surface, which not only enhances the chelation effect on heavy metal ions but also adsorbs organic pollutants through van der Waals forces and hydrogen bonding.