792 results about "Chelation" patented technology

The invention discloses inorganic modified core-shell structure water-based outdoor wood paint, a preparation method and a film forming method. The preparation method comprises the following steps: S1, pre-dispersing a GO-TiO2-ZnO composite material modified by a silane coupling agent KH570; s2, uniformly stirring the GO-TiO2-ZnO composite material modified by KH570, an acrylic acid core-shell emulsion, dipropylene glycol monomethyl ether, bentonite and an organic silicon flatting agent, and adjusting the pH (Potential of Hydrogen) of the materials to 8.0 to 8.5; and filtering to obtain the target inorganic modified core-shell structure water-based outdoor wood paint. A GO-TiO2-ZnO composite material modified by a silane coupling agent KH570 is dispersed in a self-crosslinking acrylic core-shell emulsion, an alkaline material effectively enhances formation of a high-bond-energy bidentate chelate ([R-COO] 2Zn < 2 + >) with resin carboxyl through ZnO loaded on GO, water molecule permeation channels are reduced, ultraviolet light is shielded in situ in cooperation with TiO2, and the water-resistant service life of an obtained film layer is long.

The invention relates to the field of organic fertilizer manufacturing, in particular to a preparation method of a humic acid-containing water-soluble organic fertilizer with chelated medium trace elements for synergism, and the preparation method comprises the following steps: S1, adding modified humic acid into deionized water, heating to 40-50 DEG C, stirring for 25-35 minutes, adding hydrated ferrous sulfate, introducing compressed air, and stirring for reaction for 30-50 minutes to obtain a chelating solution and the like; according to the invention, the environmental adaptability of humic acid is improved through molecular structure modification, a composite chelation system is constructed to enhance element stability, a multistage chelation sequence is optimized to prevent ion antagonism, and a physical barrier is innovated to realize a core process path of intelligent controlled release. The functional limitation of a traditional fertilizer in a complex agricultural ecological system is effectively broken through, the nutrient utilization efficiency and agricultural sustainability are remarkably improved, and the fertilizer has wide application prospects in soil remediation, precision agriculture and resource-saving planting systems.

The invention discloses a mine water fluorine removal agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method of the fluorine removal agent comprises the following steps that aluminum salt, calcium salt, magnesium salt and ferric salt are added into water to be stirred, then a chelating agent, a hydroxy carboxylic acid compound and a dispersing agent are added, the mixture is heated to 40-60 DEG C to be stirred and dispersed, and heat preservation is conducted. The preparation method gets rid of the constraint of traditional calcium salt, introduces the chelating agent, the hydroxy carboxylic acid compound and the dispersing agent on the basis of controlling the compatibility of the materials and the synthesis reaction process, and utilizes the excellent fluorine ion adsorption performance and flocculation settling performance of the aluminum-calcium-magnesium-iron-based quaternary metal material to improve the fluorine ion adsorption performance of the aluminum-calcium-magnesium-iron-based quaternary metal material. Quaternary metals are assembled into a long-chain porous structure through chelation, the specific surface area and the pore volume are further increased, the contact area with fluorine ions in mine water is increased, and the porous structure adsorbs complexing groups to achieve the purposes of rapid coordination, strong adsorption, precise chelation, flocculating settling and efficient removal of fluoride in mine water.

The invention discloses a preparation method and application of a positive electrode lithium supplement agent, the positive electrode lithium supplement agent is of a core-shell structure, and a core layer comprises lithium-rich metal materials such as lithium-rich lithium ferrite, lithium-rich lithium nickelate and lithium-rich lithium manganate; and a shell layer comprises organic lithium salt materials such as lithium bis (oxalato) borate, lithium bis (fluorosulfonyl) imide, lithium difluorophosphate and lithium difluorobis (oxalato) phosphate. The lithium-rich metal material lithium supplementing agent is coated with the organic lithium salt lithium supplementing agent which is also used as the lithium supplementing agent, so that the lithium-rich metal material is prevented from being in contact with air, and the environmental stability of the lithium-rich metal material is improved; through chelation of specific groups and transition metal ions, the structural stability of the lithium-rich metal material is improved, a lithium ion transmission path is fixed, the capacity of the lithium supplement agent for the lithium-rich metal material can be exerted to the maximum extent, and the organic lithium salt also has a lithium supplement effect, so that the migration rate of lithium ions can be further improved, and the lithium supplement effect is improved. The lithium supplementing effect of the two lithium supplementing agents greatly improves the energy density and the cycling stability of the battery.

The invention belongs to the technical field of inter-cooling water treatment, and relates to a system and method for cooperatively treating inter-cooling water through multi-stage bypasses. Comprising a gradient filtering unit, a modified adsorption unit and a composite adsorption unit which are sequentially connected, a bottom outlet of the gradient filtering unit is connected with a bottom inlet of the modified adsorption unit; a top outlet of the modified adsorption unit is connected with a top inlet of the composite adsorption unit; the gradient filtering unit sequentially comprises a manganese sand layer and a quartz sand layer from top to bottom; the modified adsorption unit is filled with a coal gangue modified straw biochar material; the composite adsorption unit is internally filled with a microcapsule-embedded calcium alginate-vinasse biochar composite material. According to the invention, three-stage cooperative treatment of iron suspended matter interception, sulfate radical adsorption and iron ion chelation is realized, and low-cost, green and sustainable indirect cooling water deep purification is realized by using the solid waste-based functional material.

The invention relates to a perovskite photovoltaic cell high-transmittance low-scattering coating material and a preparation method thereof, and belongs to the technical field of photovoltaic cells. The coating material is prepared from the following components in percentage by weight: 7.2 to 8.5 percent of PMMA (Polymethyl Methacrylate) resin, 0.17 to 0.22 percent of modified nano titanium dioxide, 0.09 to 0.11 percent of flatting agent, 0.03 to 0.04 percent of defoaming agent and the balance of solvent, the modified nano titanium dioxide is prepared into an intermediate through addition reaction of triallylamine and mercaptoethanol, and then a modifier with a network molecular structure is formed through substitution reaction of trifluoropropyl trichlorosilane and hydroxyl at the end part of an intermediate molecule; a thioether chain segment in a modifier molecule and similar nitrogen and oxygen elements form a strong chelation effect to coat the nano titanium dioxide; the introduction of the modified nano titanium dioxide makes up the problem of light transmission reduction caused by traditional titanium dioxide reinforcement.

The invention provides a low-molecular soluble chelating collector as well as a preparation method and application thereof, and belongs to the technical field of mineral processing. According to the collecting agent, low-molecular-weight ethylene glycol terephthalate serves as a precursor, and isosorbide is introduced for a copolymerization reaction; glutamic acid is introduced as a branched chain unit, and the branching degree and reaction active site density of the molecular structure are remarkably improved by utilizing the polyfunctional group characteristic of glutamic acid. A rigid ring structure and an ether bond of the isosorbide endow the medicament with good water solubility and dispersity, and invalid curling of a macromolecular chain is avoided; the introduction of glutamic acid branched chains greatly increases the number of hydroxyl groups and amino groups capable of reacting with carbon disulfide, so that each molecule carries more xanthate groups, and the adsorption stability and coverage density of the molecule on the surface of arsenopyrite are enhanced. By means of the structure, xanthate functional groups are fully exposed, multi-tooth chelation is easily conducted on the xanthate functional groups and iron and arsenic ions on the surface of arsenopyrite, a strong hydrophobic surface layer is formed, and therefore the collecting selectivity is remarkably improved.

The application discloses a light-controlled nitric oxide releasing hollow single-atom nanoscale enzyme, a preparation method and application, and belongs to the technical field of biomedical materials. In the application, spherical silica nanoparticles are used as a template, and a structure of copper ion-polydopamine coated silica nanoparticles is formed on the surface of the silica nanoparticles through self-polymerization of dopamine and chelation of copper ions, and the spherical structure is maintained with the support of the silica nanoparticles. The copper ion-polydopamine coated silica nanoparticles are pyrolyzed to obtain a copper-based single-atom nanoscale enzyme with a carbon skeleton, and a hollow spherical single-atom nanoscale enzyme is obtained after etching. Nitric oxide donor molecules are loaded into the hollow of the hollow spherical single-atom nanoscale enzyme to obtain the light-controlled nitric oxide releasing hollow single-atom nanoscale enzyme. The application can realize the synergistic treatment effect of photothermal therapy, nitric oxide gas therapy and biological catalytic therapy, is used for efficiently removing bacteria and biofilms at an infected wound site, and effectively promotes the healing of the bacteria-infected wound.

The invention provides a novel macrocyclic compound, a gadolinium chelate thereof, a method for preparing the compound and application of the compound as a magnetic resonance contrast agent. The compound has pertinence on magnetic resonance detection of liver focal lesions and can be used for liver specific imaging.

The invention discloses a preparation process of a rare earth precipitation resistant electrophoretic coating for an automobile body. The preparation process comprises the following steps: S1, preparing a stable solution; s2, preparing a rare earth chelating solution; adding lanthanum lactate into the stable solution for multiple times, and adding ammonium ceric sulfate for multiple times after the lanthanum lactate is completely dissolved; s3, preparing a resin base solution; s4, preparing mixed slurry; s5, adding a solvent and an auxiliary agent; a five-membered ring chelate with thermodynamic stability is formed by carboxyl, hydroxyl and rare earth elements in sodium citrate, rare earth ions can be tightly wrapped through strong coordination bonds, namely, empty orbits of the rare earth ions and lone pair electrons of a chelating agent form coordination bonds, so that the rare earth ions cannot be dissociated in a system, and the rare earth ions are prevented from being dissociated in the system. And a path of generating hydroxide precipitates by free rare earth ions is thoroughly blocked, so that rare earth elements are effectively ensured to be uniformly distributed in the electrophoretic paint, and the surface of a raw material treated by a subsequent electrophoresis process is more uniform.

The invention relates to the technical field of ore flotation, and discloses a preparation process of a foaming agent. The foaming agent is obtained by mixing fluorine-containing pyridine modified carboxyl betaine, sulfonic group modified polyoxyethylene ether and methyl isobutyl carbinol. Fluorine atoms can enhance the stability of the foaming agent and improve the flotation effect; sulfur atoms and metal ions form a stable chelate, and mineral separation and purification are achieved; pyridyl can generate electrostatic attraction with the surface of the mineral to form a hydrophobic membrane, so that the adhesive force of bubbles and the mineral is improved, and the flotation effect is enhanced; polar groups in the carboxyl betaine are adsorbed on the surfaces of the minerals, and non-polar groups face outwards, so that the surfaces of the minerals are hydrophobic, and a flotation effect is achieved; sulfonic groups can be adsorbed on the surfaces of minerals, so that the original hydrophilic surfaces of the minerals are changed into hydrophobic surfaces, and the floatability of the minerals is improved; the polyoxyethylene ether has good dispersing performance, so that the foaming agent is more uniformly distributed in ore pulp, and minerals can be better captured by bubbles and float upwards.

The invention specifically discloses a preparation method of a FeZn diatomic nano enzyme with adjacent double metal sites. The product is of a planar sheet structure, chitosan serves as a chelating support, and the product is prepared through in-situ doping of bimetallic precursors of Fe and Zn in a competitive coordination and high-temperature pyrolysis mode. The preparation method comprises the following steps: taking chitosan as a sacrificial template, taking ferric nitrate and zinc chloride as precursors, and carrying out in-situ conversion on the metal precursors into bimetallic atom sites by virtue of a high-temperature pyrolysis means, so as to prepare the FeZn diatomic nano-enzyme. FeZn diatoms exist in an adjacent state, the peroxidase-like activity of the FeZn diatoms is larger than that of monatomic Fe nano-enzyme and monatomic Zn nano-enzyme, the FeZn diatoms have excellent storage stability and high-temperature-resistant catalytic stability, and the preparation method has the advantages of being high in expandability, simple in process, green in raw material, stable in diatom structure and the like.

The invention relates to a water-based ball-milled passivated aluminum paste and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out ball milling on aluminum powder, a surface modifier, a hydrophilic solvent and an inorganic passivator until the target particle size of the aluminum powder is reached, and obtaining preliminarily passivated aluminum paste; carrying out suction filtration on the primarily passivated aluminum paste, uniformly stirring and mixing, adding an organic passivator, continuously stirring to carry out a passivation reaction, adding an auxiliary agent, and continuously stirring to obtain aluminum paste; wherein the organic passivator is a combination of a micromolecular organic passivator and a macromolecular organic passivator. According to the method, the in-situ passivation technology is adopted, the aluminum sheet is passivated in the extension process, the influence of dissolution and auxiliaries on the aluminum sheet is small, a more compact protective film is formed through the synergistic effect of the inorganic passivator and the organic passivator and through the oxidation film layer, chelation and precipitation reaction, corrosion of aluminum powder is greatly inhibited, and the service life of the aluminum sheet is prolonged. And the water-based passivated aluminum paste and a water-based resin system maintain good compatibility, and can show good glossiness.

An aqueous pharmaceutical composition including compound having the formula of tetragadolinium [4,10-bis(carboxylatomethyl)-7-{-3,6,12,15-tetraoxo-16-[4,7,10-tris(carboxylatomethyl)-1,4,7,10-tetraazacyclododecan-1-yl]-9,9-bis({[({2-[4,7,10-tris(carboxylatomethyl)-1,4,7,10-tetraazacyclododecan-1-yl]propanoyl}amino)acetyl]amino}methyl)-4,7,11,14-tetraazaheptadecan-2-yl}-1,4,7,10-tetraazacyclododecan-1-yl]acetate wherein the stereochemistry at the chiral carbon of the four alanine substituents is selected from the group consisting of RRRR, SSSS, RSSS, RRSS, and RRRS stereoisomers, and racemic and diastereomeric mixtures of any thereof, or a tautomer, a hydrate, a solvate, or a salt thereof, or a mixture of same is described. The compounds may be used as an MRI contrast imaging agent.

The invention relates to the technical field of polypeptides, in particular to an enzyme-mimetic polypeptide, hydrogel, a preparation method and application, the enzyme-mimetic polypeptide selects a peptide fragment I and a peptide fragment II with biocompatibility and degradability as basic sequences, and the peptide fragment I and the peptide fragment II form a beta folding unit, so that the stability of a polypeptide structure can be enhanced; then, the peptide chain is driven to be self-assembled to form a regular nanofiber structure; according to the invention, the characteristic that the biomimetic polypeptide and metal ions are subjected to a complex reaction to form a chelate is utilized, the transparent and stable hydrogel can be rapidly formed without adding a gelatinizing agent, and TEM, SEM and rheological characterization are carried out on the hydrogel to find that the hydrogel containing the biomimetic polypeptide has a porous nanofiber network structure, so that the biomimetic polypeptide can be used for preparing the hydrogel. Meanwhile, the biomimetic polypeptide hydrogel has the same flexibility as natural tissues, and the characteristics indicate that the biomimetic polypeptide hydrogel is expected to have wide application prospects in the aspects of biomimetic materials, antibiosis, cell culture, drug carriers and the like.

The invention discloses an insect antibacterial peptide nutrient solution as well as a preparation method and application thereof, and belongs to the technical field of biology. Insect protein (fly maggot powder / hermetia illucens) and plant fiber (bran) are subjected to enzymolysis and then subjected to a pH gradient chelation process (5.0-7.0-8.5), metal ions (Fe < 2 + > / Mn < 2 + > / Zn < 2 + >) are added in stages for chelation, the chelation degree is larger than or equal to 91.4%, lentinan and alginate oligosaccharide are added for synergistic interaction, and finally the insect antibacterial peptide nutrient solution is obtained. Experiments prove that after the insect antibacterial peptide nutrient solution prepared by the invention is used for carrying out root irrigation treatment on plants, tomato yellow leaf curl virus or tomato spotted wilt virus can be remarkably prevented and treated, and the insect antibacterial peptide nutrient solution has high efficiency and persistence and conforms to the development direction of green plant protection.

The invention provides an environment-friendly chalcopyrite inhibitor and a copper-molybdenum separation method, and belongs to the technical field of copper-molybdenum separation. The environment-friendly chalcopyrite inhibitor is a sulfur-containing histidine derivative, a unique aromatic conjugated structure of the environment-friendly chalcopyrite inhibitor can be converted into sulfydryl through thiocarbonyl tautomerization, S in the sulfydryl and N atoms which contain lone pair electrons and do not participate in conjugation in an aromatic ring cooperate with each other, copper ions in chalcopyrite can be directionally chelated, a formed chelate is of an annular structure, and the chalcopyrite inhibitor can be used for inhibiting copper ions in chalcopyrite. Chelation with molybdenum in molybdenite is avoided, and excellent selectivity is shown. The environment-friendly chalcopyrite inhibitor contains carboxyl and tertiary amino at the same time, and it is guaranteed that the environment-friendly chalcopyrite inhibitor can efficiently inhibit target minerals in a wide pH window through the two hydrophilic functional groups of different structures. Based on the specific space structure of the environment-friendly chalcopyrite inhibitor, the types of functional groups and mutual cooperation of different functional groups, efficient selective inhibition of chalcopyrite in copper and molybdenum associated ores can be achieved safely and environmentally in a wide pH range.

The invention relates to the technical field of secondary batteries, in particular to an amphiphilic polymer as well as a preparation method and application thereof, and the amphiphilic polymer comprises a structure as shown in a formula (I) and / or a formula (II): # imgabs 0 # formula (I) and # imgabs 1 # formula (II). The amphiphilic polymer provided by the invention captures hydrogen fluoride (HF) under the action of electrostatic adsorption, hydrogen bonds and weak electrons in an acid environment, and realizes metal ion capture by virtue of coordination chelation of nitrogen atoms of a triazole ring and auxiliary enrichment and wrapping of a polyether chain in an alkaline environment, so that corrosion of internal materials of a battery is effectively prevented, and the service life of the battery is prolonged. The performance and the service life of the battery are improved.

The invention relates to the technical field of high polymer materials, in particular to an anti-aging thread gluing material and a preparation process thereof. Comprising the following steps: preparation of aluminum-doped zinc oxide, tannic acid modified aluminum-doped zinc oxide, ferulic acid modified nylon fiber and modified nylon master batch preparation of the thread gluing. According to the invention, groups of tannic acid and aluminum ions and zinc ions of aluminum-doped zinc oxide are driven by heat energy of a reflux reaction to simultaneously generate chelation-dehydration condensation to form a five-membered ring chelate, so that a compact coating layer is formed on the surface, and the coating layer is simple in component and has very stable chemical bonds; the ultraviolet light stability of aluminum-doped zinc oxide is enhanced, the layer can generate hydrogen bond / pi-pi interaction with nylon amido bonds, the interface bonding strength is improved, the particle size is kept at the level of no filter pressure fluctuation in the spinning process, and the volume resistivity of nylon fibers is reduced.

The specific embodiment of the invention provides an anti-rust coating and a coating, the anti-rust coating comprises a water-based rust conversion agent and a water-based epoxy coating, the water-based rust conversion agent comprises a water-based acrylic emulsion and ammonium polyacrylate salt, the pH value of the water-based rust conversion agent is 6-8, Fe < 3 + > is converted into a stable complex in situ through a carboxyl chelation reaction, and the stable complex is added into the water-based epoxy coating. The water-based rust conversion agent and the epoxy coating have the advantages that the water-based rust conversion agent is added into the water-based epoxy coating, the continuous acid etching risk of a matrix is avoided, the water-based epoxy coating comprises polydopamine grafted and coated silicon dioxide, micropores can be reduced by the coating, permeation of water, oxygen and chloride ions can be inhibited, hydrolytic stripping and secondary corrosion can be prevented, and the water-based rust conversion agent and the epoxy coating have good compatibility; the formed coating is excellent in interlayer adhesive force and compact and firm in film layer, and the long-acting protection requirement in a severe corrosion environment can be met when the anti-rust coating is used for coating corrosion prevention of a steel member.

The invention aims to provide a method for preparing micron-sized zinc metastannate by wet recovery of tin and zinc in electronic wastes and a synthetic method of 4-hydroxy-1-indanone, and belongs to the technical field of metal recycling. According to the method, amino coordination and carboxylic acid chelation are utilized, tin and zinc in the electronic waste are selectively leached out under the mild acidic condition, impurity metals such as iron and copper are retained in residues due to the difference of complexing constants, and metal ion grade separation (selectivity gt and 99%) is achieved. And then, through evaporation-crystallization regulation and control, the Sn-Zn complex is directionally reconstructed into micron-sized zinc metastannate. In indanone synthesis, micron-sized zinc metastannate forms a local protonic acid environment by adsorbing trace moisture in a reaction system, synchronously activates a C = N bond (Lewis acid site catalysis) of an imine substrate and stabilizes a cyclization transition state (hydrogen bond guiding effect), so that the activation energy of [4 + 1] cycloaddition reaction is reduced, reaction equilibrium is driven to move towards a product end, and the yield of indanone is increased. And quantitative conversion of indanone under mild conditions (the yield is 60%) is realized.

The invention relates to the technical field of fertilizers, in particular to a preparation method of a chelated medium element preparation for a synergistic liquid fertilizer. The technical problems that a chelating agent is high in cost, poor in stability and low in bioavailability are solved. The efficient chelating agent is prepared by efficiently extracting or converting a polysaccharide-polyphenol compound and a small peptide mixture with unique chelating performance from specific agricultural or industrial wastes and mixing the polysaccharide-polyphenol compound and the small peptide mixture. Then, a chelating-wrapping dual-stabilization technology is adopted, specifically, a high-efficiency chelating agent and medium element ions are subjected to a chelating effect, and then modified chitosan is added to wrap the chelate, so that nutrient loss is reduced, and nutrient elements are released more evenly. The chelated medium element preparation remarkably improves the stability and effectiveness of nutrient elements through the synergistic effect of double stabilization mechanisms.

The invention discloses low-resistance branch-sheet-shaped silver-coated copper powder, the copper powder is in a branch sheet shape, the surface of the branch-sheet-shaped copper powder is uniformly coated with a silver layer, the surface of the silver layer is coated with a chelate layer, and the chelate layer comprises cysteine and glutathione. The invention further discloses a preparation method of the low-resistance branch-sheet-shaped silver-coated copper powder. The preparation method comprises the following steps: plating silver on the surface of the branch-sheet-shaped copper powder to obtain an intermediate; and cleaning the intermediate with an aminothiol solution, drying, and then adding the dried intermediate into a mixed solution containing cysteine and glutathione for chelation reaction to obtain the low-resistance dendritic sheet-shaped silver-coated copper powder. The invention further discloses application of the low-resistance branch-sheet-shaped silver-coated copper powder in a coating. The invention further discloses a coating which comprises a film forming substance and the low-resistance branch-sheet-shaped silver-coated copper powder. The low-resistance branch-sheet-shaped silver-coated copper powder has good dispersity, oxidation resistance and conductivity in a coating, and the adhesive force of the coating can be improved.

The invention relates to the technical field of agriculture, and discloses a synergistic technology for repairing soil and promoting plant stem cells by using modified amino active groups. Comprising the following steps: modifying an amino acid compound, namely modifying active groups in amino acid and fulvic acid, so that the active groups have a synergistic effect with cellulase, hemicellulase, urease, phosphatase, chitinase, beta-glucanase, superoxide dismutase, peroxidase and catalase; through the strong chelation of the modified amino active groups and heavy metal ions in soil, the bio-availability and mobility of heavy metals can be effectively reduced, for example, the chelation removal rate of cadmium, lead and other heavy metals can reach 40% or above, the heavy metal contaminated soil is repaired, the soil structure is improved, the content of organic matters in the soil is increased, and the pH value of the soil is adjusted; the acidified or alkalized soil is gradually restored to a pH range suitable for plant growth, and the water and fertilizer retention capability of the soil is improved.

The present application relates to a kind of composite phosphorus-free scale inhibitor and its preparation method, including 800-1200 parts by weight of desalted water, 1-3 parts by weight of modified lignin sulfonate, 2-4 parts by weight of calcium magnesium acetate, 0.5-1.5 parts by weight of azole, 400-600 parts by weight of soluble inorganic zinc salt and 50-150 parts by weight of copolymer A.The composite phosphorus-free scale inhibitor provided by the present application is clear and transparent concentrate, after the above concentrate is added to circulating water, the effective ingredient in it can form soluble chelate with Ca 2+ , Mg 2+ Forming, increase the saturation solubility of ion, hinder micro-fouling lattice formation, distort crystal growth, so that microcrystalline will not accumulate into scale, and can make old scale loose, gradually shed old scale;At the same time, the special corrosion inhibitor and other corrosion inhibitor produce synergistic effect, which can effectively control the pitting of stainless steel, achieve the purpose of preventing scale, and fundamentally reduce the efficiency of corrosion and scale inhibition.

The invention provides an efficient boiler scale and corrosion inhibition composite agent and a preparation method thereof, and belongs to the technical field of water treatment agents. The sulfonated polycarboxylic acid copolymer is introduced, crystal nucleus formation is inhibited through chelation of carboxylic acid groups of the sulfonated polycarboxylic acid copolymer, the dispersing capacity and hard water tolerance are improved through sulfonic acid groups, normal growth of microcrystals can be adsorbed and interfered through regulation and control of isopropanol on molecular weight, and loose scale bodies easy to remove are promoted to be formed; the polyether grafted copolymer is used as an efficient dispersing agent, the main chain of the polyether grafted copolymer is responsible for adsorbing and anchoring generated tiny scale bodies, and extended polyether long side chains of the polyether grafted copolymer form a steric hindrance shielding layer to wrap particles and suspend stably, so that the scale bodies are prevented from gathering and growing up; the two components cooperate to form a scale inhibition defense line, and cooperate with auxiliary agents such as the compound amine and the deoxidant in the system to construct a comprehensive protection network, so that long-period stable operation of the boiler system is guaranteed.

The invention relates to the field of photoelectrochemistry, in particular to a photo-anode based on phosphonic acid chelation and photoelectrochemistry activation and a preparation method of the photo-anode. The invention aims to provide a deep-energy-level defect dynamic passivation method based on phosphonic acid chelation and photoelectrochemical synergistic activation, which comprises the following steps: introducing 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP) molecules (ZISH) on the surface of a zinc-indium-sulfur (ZIS) photo-anode in a low-temperature water bath manner, and carrying out chelation reaction on the molecules and Zn sites on the surface in a photoelectrochemical activation manner, so as to obtain the deep-energy-level defect dynamic passivation method based on phosphonic acid chelation and photoelectrochemical synergistic activation. And a stable Zn-O-P coordination structure is formed. Under the action of photoelectric bias, the structure can reconstruct a Zn-S frame in situ, adjust the coordination number of Zn and convert a deep trap into a shallow energy level state (ZISA), so that interface recombination is effectively inhibited while a high hole injection rate is maintained.

The invention discloses a metal gel composite system for reducing elastic modulus based on chelation and a preparation method thereof. The composite system is a hydrogel system containing metal ions and a chelating agent, the chelating agent is phytic acid, and the metal ions and the phytic acid are chelated in the hydrogel to form a chelating structure, so that the elastic modulus of the hydrogel is reduced. The composite system can have the Young modulus of brain-like tissue, the Young modulus can be generally lower than 300 Pa, meanwhile, the composite system can also have excellent conductivity, and the composite system has wide application prospects in the field of bioelectronic devices.

The invention discloses a polydopamine-tea polyphenol coated copper manganese oxide composite nano-enzyme as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. According to the invention, a DA-Cu (II)-EGCG (epigallocatechin gallate) complex is formed by virtue of chelation of main components of dopamine and tea polyphenol, namely epigallocatechin gallate, and copper ions; potassium permanganate is introduced for oxidative polymerization to obtain the polydopamine-tea polyphenol / copper manganese oxide organic-inorganic hybrid nano composite material, the nano composite material is monodisperse nano particles, the average particle size is about 80 nm, the nano composite material shows excellent nano enzyme catalytic activity, active oxygen free radicals can be effectively removed, and the nano composite material can be used for preparing nano-enzyme. The material has good photo-thermal conversion performance under near-infrared light, and shows excellent photo-thermal and photodynamic synergistic antibacterial effects. The preparation method disclosed by the invention is simple, mild, environment-friendly, low in cost and convenient for batch production.

The invention provides an etching solution, application thereof and an etching method of an aluminum-based metal laminated film, and particularly relates to the technical field of etching solutions. The etching liquid is prepared from the following components in percentage by weight: 3 to 10 percent of metal oxidizing agent, 55 to 85 percent of phosphoric acid, 5 to 15 percent of organic acid, 0.2 to 1.8 percent of organic acid ammonium, 0.1 to 1.2 percent of nitric acid imidazole ionic liquid, 0.15 to 0.8 percent of amino acid based ionic liquid, 0.05 to 1.2 percent of modified beta-cyclodextrin, 0.08 to 1 percent of polyalcohol ether compound and the balance of water. The etching liquid has the advantages of low line width loss, excellent etching profile, high cleanliness, good compatibility and long service life, a buffer system, a chelation mechanism and a volatilization inhibition function are effectively cooperated, the service life of the liquid medicine is greatly prolonged, excellent chemical stability and aging resistance are fully reflected, high-compatibility etching is realized, and the corrosion resistance of the liquid medicine is improved. And the comprehensive performance advantages of high precision, low defect and long service life are also realized.