32 results about "Ion complexation" patented technology

The present application belongs to the technical field of pharmaceutical preparation, and relates to an electrolytic silver ion solution capable of completely inactivating HIV and a preparation method thereof. The electrolytic silver ion solution uses ultrapure water as a solvent, and contains divalent silver ions, a complexing agent and a complexing agent in the electrolytic silver ion solution. The complexing agent is hexamethylenetetramine capable of forming a stable complex with silver ions and capable of quantitatively analyzing the concentration of silver ions. The hexamethylenetetramine is of an analytical purity grade. The complexing agent is ethylenediamine capable of forming a more stable silver-ammonia complex ion, i.e., diammine silver, and capable of doubling the concentration of the generated silver-ammonia complex ion. The concentration of the divalent silver ions is 200-300 mg.kg ‑1 -1; the highest concentration of the complexing agent is 0.9 g.kg ‑1 -1; and the highest concentration of the complexing agent is 0.55 g.kg ‑1 The complexing agent and the complexing agent of the present application have a small dosage, a high relative ratio of silver ions and a stronger activity, and the inactivation rate of HIV is as high as 99.993%.

The invention discloses a method for preparing high-stability anionic polyacrylamide based on thiol-ene click chemistry. The core of the method is to construct an omnibearing stable system of a polymer from three dimensions through a click chemical reaction: the structure is stable: a topological chain structure with a space charge shielding effect is formed through accurate arrangement of monomers, so that a molecular skeleton and an active group keep long-acting stability. And the conformation is stable: the rigid-flexible adjustable chain segment design forms an internal microphase separation structure, so that the polymer can maintain the stretched and stable hydration conformation in various aqueous solutions, and the performance is consistent. And the process is stable: the reaction mechanism of ion complexing and click addition realizes the gentle release of polymerization heat, so that the synthesis process has high tolerance to parameter fluctuation. According to the invention, the problem of performance degradation caused by disordered structure and sensitive process of a traditional product is systematically solved, and a reliable solution is provided for the application field with strict requirements on stability.

The application discloses a kind of low-carbon cementing material by waste incineration fly ash excited ore powder and preparation method thereof, by weight percentage, including the following components: modified waste incineration fly ash 8~12%, ion complex component 1~3%, composite shrinkage component 2~6%, ore powder 55~65%, water 23~28%.Preparation method includes the following steps: S1, preparation modified waste incineration fly ash, ion complex component, composite shrinkage component;S2, modified waste incineration fly ash, ion complex component, composite shrinkage component, ore powder, mixing water, fully mixed and stirred evenly, can obtain the low-carbon cementing material by waste incineration fly ash excited ore powder described in the application.In the aspect of component design, the application is environmentally friendly, low cost, in the performance aspect, the flow rate can be adjusted, the mechanical properties are excellent, the volume shrinkage is small.

The application discloses a cationic strong water-absorbing and high salt-resistant hydrogel and a preparation method thereof. The method comprises the following steps: under stirring, a monomer DMDAAC solution is firstly added into a reactor, and then an initiator, a crosslinking agent, a metal ion complexing agent and deionized water are added at one time; a programmed temperature rising is performed to add the reaction liquid in sections to initiate a polymerization reaction; the polymerization reaction is kept warm to perform a polymerization reaction and polymerization reaction curing; a PDMDAAC hydrogel gel product is obtained; and after granulation, the product is dried to obtain a PDMDAAC hydrogel solid particle. The PDMDAAC hydrogel prepared by the application has strong water-absorbing property and high salt resistance; the water-absorbing ratio is above 3800.00 g / g in deionized water under normal temperature conditions, the water-absorbing ratio is above 100.00 g / g in physiological saline, and the monomer conversion rate is 91.32%.

The invention discloses low-medicament electroplating wastewater circulation treatment equipment and a treatment method.The low-medicament electroplating wastewater circulation treatment equipment comprises a fixing frame, and an electroplating water tank is welded to one end of the fixing frame. During use, NaOH-citric acid composite wheat straw is placed in a PVC column sleeve, then a biological contact oxidation frame is filled with pseudomonas three-dimensional elastic filler, and the biological contact oxidation frame is sealed; the PVC column sleeve is movably closed relative to the second supporting frame, the biological contact oxidation frame is movably closed relative to the first supporting frame, the movable frame is descended relative to the biological contact oxidation frame, the movable frame is movably descended relative to the PVC column sleeve, and finally, the NaOH-citric acid composite wheat straw surface hydroxyl, carboxyl and heavy metal ions are subjected to a complexation reaction. The surface of the pseudomonas three-dimensional elastic filler is inoculated with a compound microbial flora for microbial metabolism to degrade COD, a water pump is turned on, and water purified by the water pump is discharged into an electroplating water tank for circular treatment, so that the low-medicament electroplating wastewater circular treatment equipment and treatment method are completed.

Ligands capable of complexing hydrated lithium ions may comprise at least one arylboronic acid internally complexed with a heteroatom, such as via internal complexation with an amine, ether, or carbonyl to define a 5- or 6-membered ring. The arylboronic acid may be covalently bonded to a substrate via a linker moiety when accomplishing the foregoing, or the linker moiety may contain a reactive functionality capable of forming a covalent bond to a substrate or other group. The linker moiety may be further covalently bonded to an anionic functional group, such as a second arylboronic acid internally complexed with a second heteroatom. Ligands may also comprise at least one arylboronic acid internally complexed with a heteroatom, wherein the ligand is further covalently bonded to a molecule that undergoes a spectroscopic or electrochemical change in the presence of lithium ions. Substrate-bound or substrate-free lithium complexes may be formed using the ligands.

The invention discloses a multifunctional hydrogel which comprises polyethylene glycol diacrylate, methacrylated beta-cyclodextrin and a zwitterionic monomer, and the zwitterionic monomer is sulfobetaine methacrylate or [2-(methacryloyloxy) ethyl] dimethyl (3-sulfopropyl) ammonium salt; wherein the mass percentage of the polyethylene glycol diacrylate is 1-30%, the mass percentage of the zwitterionic monomer is 10-30%, and the mass percentage of the methacrylated beta-cyclodextrin is 1-5%. According to the invention, a polyethylene glycol diacrylate cross-linked skeleton is combined with a zwitterionic monomer to enhance hydrophilicity and ion complexing ability, so that a large-mesh structure is formed; and the beta-cyclodextrin derivative is selectively combined with the aromatic organic pollutants through the host-guest interaction. Through cooperation of multifunctional sites, dyes, drugs, metals and micro-plastics are removed at the same time. The multifunctional hydrogel disclosed by the invention has the advantages that the pollutant removal rate is increased, and the multifunctional hydrogel has reproducibility and can be applied to various water treatment processes.

The invention relates to a particle-size-adjustable low-corrosivity warm fog eliminating catalyst and a preparation method thereof, and belongs to the technical field of manual intervention weather catalysts. The catalyst comprises the following raw materials in percentage by mass: 5%-70% of inorganic sodium salt, 0%-30% of inorganic magnesium salt, 0%-30% of inorganic potassium salt, 5%-35% of weak acid and strong alkali salt, 0.1%-5% of an anti-caking agent and 0.1%-5% of an additive. According to the catalyst, weak acid and strong alkali salts are compounded with salts, a dual corrosion-resistant mechanism of passive film protection-ion complexing is constructed, the solution conductivity is reduced, and metal corrosion is retarded; the anti-caking agent can prevent caking during storage, and the dispersity is improved; the additive can reduce the salinization risk of the soil and optimize the flowability. According to the method, high-temperature and high-pressure equipment is not needed in the preparation process, the pressure and the rotating speed can be adjusted by monitoring particle size distribution in real time through a laser particle size analyzer according to the target particle size during airflow crushing, comprehensive performance improvement of accurate particle size regulation and control, low corrosion, caking resistance and high adaptation is achieved, the cost is reduced compared with that of existing composite catalysis, and industrial production can be achieved.

The invention discloses a method for chemical degradation pretreatment of a binder before disassembly of a lithium battery, and relates to the technical field of lithium batteries, and the method comprises the following operation steps: S1, preparation of a pretreatment solution: adding a weakly alkaline compound into deionized water, and mixing to prepare the weakly alkaline pretreatment solution with the mass concentration of 5-15%, adding a fluorine ion complexing agent with the mass concentration of 0.1-0.5% into the weakly alkaline pretreatment solution, and uniformly stirring and mixing to obtain a reaction solution; s2, lithium battery pretreatment: performing surface cleaning and discharging treatment on the lithium battery; according to the method for chemical degradation pretreatment of the binder before disassembly of the lithium battery, a fluorine ion complexing agent is added into a weakly alkaline pretreatment solution, and the reaction balance is broken and the molecular chain breakage of the binder is accelerated by virtue of the action that the fluorine ion complexing agent and fluorine ions generated by degradation of the binder form a stable complex.

The invention discloses an ionic composite graphene-activated carbon adsorbent and a preparation method and application thereof, and belongs to the technical field of pollutant adsorption. Graphene oxide is subjected to a base catalysis reaction to form quaternized electropositive graphene oxide; activated carbon is subjected to acid catalysis treatment to increase the phenolic hydroxyl density of the activated carbon, electronegative activated carbon is formed, and finally the two kinds of carbon material turbid liquid react to generate the composite carbon adsorption material connected by N + and O-. The prepared adsorbent has larger adsorption capacity and excellent conventional pollutant adsorption performance; when the adsorbent is used for treating papermaking wastewater, the alkaline pH environment of the papermaking wastewater can enable the adsorbent to release oxygen anions and nitrogen cations, the cellulose colloid steady state of the papermaking wastewater is broken through surface charges, meanwhile, residual pollutants in sewage are captured, the adsorption effect is further enhanced, and the defects that a traditional carbon-based adsorption material is single in electrical property and poor in adsorption effect are overcome. The high-alkalinity papermaking chemi-mechanical pulp wastewater with complex components is difficult to deal with.

This invention belongs to the field of biosensing technology, specifically relating to a G-MXene-PAA-Fe 3+ Hydrogels, their preparation methods, and applications. This invention modifies MXene with antioxidants to prepare modified G-MXene; then, using acrylic acid (AA) free radical polymerization chemical crosslinking as the first network, polyacrylic acid (PAA)-Fe... 3+ Metal ions are complexed into a second network, and modified G-MXene is used as a crosslinking agent and conductive nanofiller. G-MXene-PAA-Fe is prepared using a simple and easy-to-operate one-pot method with ammonium persulfate as the initiator. 3+ Self-healing conductive hydrogel. The self-healing conductive hydrogel prepared by this invention has excellent stability, self-healing properties, mechanical properties, conductivity, and sensing properties, and has broad application prospects in the field of flexible sensors.

The application discloses a copper plating composition and a chemical copper plating process, and relates to the field of copper plating compositions, which is composed of the following components: a copper salt providing divalent copper ions; a complexing agent for complexing the divalent copper ions; a stabilizer for stabilizing the copper plating composition, which is selected from at least one of the group consisting of 2,2'-dipyridyl, potassium selenocyanate, potassium thiocyanate and 2-mercaptobenzimidazole; a reducing agent for reducing the complexed divalent copper ions to metallic copper; an alkaline adjusting agent for adjusting the pH value of the composition to an alkaline range suitable for chemical copper plating; and a solvent. The process stability and product yield are improved: through the optimized combination of the core stabilizer, the complexing agent and the reducing agent, the self-decomposition of the copper plating bath is effectively inhibited, the process stability is significantly enhanced, the incidence of key defects such as backlight defects in the metalization of the circuit board hole is greatly reduced, and the high yield of the final product is ensured.

A supramolecular histochemistry system for staining includes a chaotropic ion and a chaotropic ion complexing agent that acts as a molecular host and accepts the chaotropic ion as a molecular guest. The chaotropic ion facilitates the diffusion of a probe, such as an antibody, into and within a tissue sample, binding the probe to the molecular host or diluting the probe, thereby promoting the association of the antibody with a target antigen and generating an immunostaining or histochemistry signal. Alternatively, a small fluorescent probe serves as the molecular guest and is complexed by the supramolecular host to facilitate deep penetration. A method for performing histology employs the supramolecular system with deep, uniform histochemistry. Such a method is relatively rapid, scalable, automatable, and cost-effective.

The invention belongs to the field of purification and extraction of vanadium. The invention discloses a method for preparing low-lead ammonium polyvanadate by using a calcified acid vanadium leaching solution. The method comprises the following steps: taking a qualified liquid supernatant of the calcified acid leaching vanadium liquid, and controlling the pH value of the supernatant to be 2.4-3.0; adding ethylenediaminetetraacetic acid into the supernate, and stirring for a preset time to enable lead ions in the solution to be fully complexed with the ethylenediaminetetraacetic acid; adjusting the pH value of the solution to the pH value required by vanadium precipitation under an acidic condition; adding a vanadium precipitation agent into the solution; and heating the solution added with the vanadium precipitation agent to precipitate vanadium, filtering, and drying the solid to obtain the low-lead ammonium polyvanadate. According to the method, EDTA serves as a lead ion complexing agent, lead ions in the solution are combined with EDTA before vanadium precipitation, the stability of the lead ions in the solution is improved, the probability that lead precipitates along with vanadium in the follow-up vanadium precipitation process is reduced, the content of lead in ammonium polyvanadate is reduced, and a low-lead APV product meeting the battery application requirement can be obtained.

The present invention relates to an antistatic polycarbonate composition having good cleanliness and a preparation method therefor. The antistatic polycarbonate composition comprises a polycarbonate, an antistatic agent, an ion trapping agent, a compatibilizer, a toughening agent, an antioxidant, a lubricant, and a light stabilizer. In the present invention, a crown ether is incorporated into an antistatic polycarbonate. Under the action of dipole-charge, a negatively charged oxygen atom of the crown ether can be complexed with positively charged metal cations to form a relatively stable complex. By means of the metal ion trapping ability of the unique cyclic structure of the macromolecular crown ether, the ion precipitation performance of the final product is improved, thereby obtaining an antistatic polycarbonate composition having good cleanliness.

The preparation method is characterized by comprising the following steps: S1, synthesizing a functional monomer: adding maleic anhydride and diethanol amine into a reaction kettle according to a mass ratio of 98: 110, carrying out heat preservation esterification at 70-75 DEG C for 3-4 hours, cooling to 40-50 DEG C, dropwise adding a pH value regulator to carry out a neutralization reaction, regulating the pH value to 7.0-8.0, and carrying out heat preservation esterification at 70-75 DEG C for 3-4 hours to obtain the functional monomer; purifying and drying to obtain a functional monomer; according to the thickening agent, acrylic acid and acrylate chain segments are used as main chain structures, a diethanol amine modified maleic anhydride carboxylate functional monomer is introduced for graft modification, and side chains of polyhydroxy, polycarboxyl and tertiary amine groups are introduced into a sodium polyacrylate main chain, so that a dual synergistic effect of strong hydrogen bond crosslinking and metal ion complexing is constructed; the viscosity stability, electrolyte resistance and system compatibility of the thickening agent are greatly improved, and the defects that the shear viscosity of a traditional polyacrylate thickening agent is reduced under a high-temperature condition, the thickening agent loses efficacy in a high-salt environment and the thickening agent and a coating are easily flocculated and layered can be effectively overcome.

The invention discloses a carboxylated CNF (punicalagin / chitosan core-shell fiber as well as preparation and application thereof, and belongs to the technical field of functional fiber preparation. The punicalagin is used as a bio-based functional component, and carboxylated CNF (carboxylated cellulose nanofiber) with negative electricity is introduced as a reinforcing skeleton for synergistic interaction, so that the mechanical property and water resistance of the chitosan fiber are improved, and the chitosan fiber is endowed with functional characteristics of oxidation resistance, bacteria resistance and the like. According to the invention, crop waste resources are fully utilized, and introduction of toxic cross-linking agents is reduced. Meanwhile, the invention provides a coaxial spinning method adopting core-shell blending, chitosan with positive electricity in a shell layer and carboxylated CNF with negative electricity in a core layer are mutually diffused and wrapped through ion complexing, swelling fracture of the fiber is improved, the water absorption effect is achieved through surface wrinkles and internal pores, and the water absorption effect is improved. The material is expected to be applied to the fields of surgical sutures, wound hemostatic dressings and the

The present invention relates to a method for producing a precursor for a positive electrode active material, the method comprising: a seed formation step of forming a precursor for a positive electrode active material seed by performing a coprecipitation reaction while supplying a transition metal aqueous solution, an ammonium cation complexing agent, and an alkaline compound to a reactor; and a particle growth step of growing a precursor for a positive electrode active material particle by performing a coprecipitation reaction while supplying a transition metal aqueous solution, an ammonium cation complexing agent, and an alkaline compound to a reaction solution in which the precursor for a positive electrode active material seed has been formed, wherein in the particle growth step, the reaction is performed while continuously increasing the supply rates of the transition metal aqueous solution and the ammonium cation complexing agent.

This application discloses an all-vanadium redox flow battery electrolyte, its preparation method, and its application, relating to the field of flow batteries. The all-vanadium redox flow battery electrolyte contains vanadium ions, sulfate ions, a vanadium ion complexing stabilizer, and a passivating agent; the concentration of vanadium ions is >2.5 mol / L; the vanadium ion complexing stabilizer includes a vanadium ion complexing agent and a vanadium ion stabilizer, with a molar ratio of vanadium ion complexing agent, vanadium ion stabilizer, and vanadium ions of (0.2~1.2):(0.07~0.6):4; the concentration of the passivating agent is 0.04~2 mol / L. Adding the vanadium ion complexing stabilizer and passivating agent to the electrolyte increases the concentration of vanadium ions and effectively reduces the direct contact between pentavalent vanadium ions and the electrode. Furthermore, the passivating agent forms a passivation film on the electrode surface to block pentavalent vanadium ions, thereby achieving a vanadium ion concentration above 2.5 mol / L, suitable for higher operating voltages and higher operating temperatures.

The invention relates to the technical field of medicine, in particular to a metal ion complexing agent, a metronidazole gel preparation thereof and a preparation method of the metronidazole gel preparation. The first component is selected from at least one of disodium edetate, sodium calcium edetate and tetrasodium edetate; the second component is selected from at least one of sodium tartrate and sodium citrate; wherein the mass ratio of the first component to the second component is (8: 1)-(1: 6). The metronidazole gel preparation has the advantages that the preparation process is simple, the stability is better, and the safety and the effectiveness can be guaranteed.

The invention discloses a method and a system for preparing purified phosphoric acid by adopting a centrifugal extraction technology, and solves the problem that the existing purified phosphoric acid production technology cannot meet the requirements of high purity effect and low cost at the same time. The method comprises the following steps: S1, primary acid concentration: filtering to obtain concentrated crude acid; s2, desulfurizing the concentrated crude acid obtained in the step S1 by adopting a desulfurizing agent; s3, defluorinating the desulfurized crude acid obtained in the step S2 by adopting a defluorinating agent; s4, carrying out cationic complexing treatment on the defluorinated acid by adopting a mixture of a cationic complexing extraction agent 2-(2-ethylhexyl) phosphoric acid P204 and sulfonated kerosene; s5, carrying out centrifugal extraction by adopting an extraction agent; s6, centrifugal washing; s7, centrifugal reverse extraction; and S8, further separating acid and concentrating to obtain purified phosphoric acid. The method has the advantages of good phosphoric acid purification effect, low cost and the like.

This invention relates to a protective system and its preparation method for enhancing the durability of concrete in coastal bridges. The protective system is applied to concrete containing cementitious materials, aggregates, and water. The cementitious materials include functional admixtures, such as a proprietary composite modified core-shell powder, complexation reaction modified mineral powder, and zeolite powder-supported gypsum whisker composite powder. This invention utilizes a dual-response film-forming mechanism of "secretion-triggered ion complexation." When biological secretions come into contact with the concrete surface, the core-shell powder releases alkaline substances to neutralize organic acids. Simultaneously, the complexation reaction modified mineral powder undergoes a complexation reaction with metal ions in the secretions, forming an organic-inorganic interlocking protective film. This film then fuses with the subsequently grown shellfish shell to construct a dual protective structure. This invention provides stable protection, enhancing the concrete's resistance to chloride ion penetration and sulfate attack, effectively inhibiting steel corrosion, and extending the service life of concrete in coastal bridges.

The invention belongs to the technical field of building materials, and particularly relates to a high-doping-amount fine-fraction iron tailing-based cementing material as well as a preparation method and application thereof. The high-doping-amount fine-fraction iron tailing-based cementing material comprises the following components: iron tailing active powder, an alkali activator, high-calcium silicon-aluminum solid waste, a sulfate activator and an ion complexing regulating agent, in the cementing material system, the molar ratio of calcium oxide to silicon dioxide is 1.0-3.0, the molar ratio of aluminum oxide to calcium oxide is 0.01-0.3, the molar ratio of sulfur trioxide to calcium oxide is 0.1-3.0, and the molar ratio of iron trioxide to calcium oxide is 0.06-0.15. Through multi-component coordinated regulation and ion complexing optimization, the mixing amount of the fine-fraction iron tailings exceeds 40%, meanwhile, it is guaranteed that the cementing material has excellent early-stage and later-stage strength, the utilization rate of iron-phase-containing silicon-aluminum solid waste is increased, and the environmental pressure is reduced.

The invention provides a method for recovering phosphorus from anaerobic fermentation supernate by using a blue iron ore crystallization method, which comprises the following steps: carrying out solid-liquid separation on the anaerobic fermentation supernate, and then carrying out inert gas replacement treatment to obtain a solution A; adding surface-improved quartz sand into the solution A to obtain a mixture B; adding soluble bivalent iron salt into the mixture B to obtain a mixture C; adjusting the pH value of the mixture C to 6.0-7.0 under a stirring condition, maintaining the pH value for 10-20 minutes, then increasing the pH value to 7.0-8.0, and maintaining the pH value for 40-70 minutes to obtain a mixture D; and the mixture D is settled, washed and dried, and a blue iron ore product is obtained. The method solves the problem that the blue iron ore crystallization efficiency is low due to complexation of soluble organic matters and ferrous ions in the anaerobic fermentation supernate and unstable phosphorus concentration, effectively inhibits interference of the organic matters, guarantees stability and controllability of the crystallization process, realizes stable growth of blue iron ore crystals, and improves the quality of the blue iron ore. The recovery efficiency of phosphorus and the product purity are obviously improved.

The application discloses a preparation method of a functionalized rare earth mineral-based autotrophic denitrification material and application of the material in purification of fluorine-rich black and odorous water bodies. The application adopts cement as a binder and a pH buffer, and uses waste fruit kernels as inner cores, and the waste fruit kernels have a carbon source slow-release effect; nano zero-valent iron composite material and nano zero-valent aluminum composite material are used as pore-forming agents, and are mixed with nano zero-valent sulfur composite material and nano rare earth composite material to prepare a porous rare earth / sulfur mineral biological carrier material. The composite material has a large specific surface area and high porosity. The porous rare earth / sulfur mineral biological carrier material is added into a fluorine-rich black and odorous water body which needs to be deeply purified, and is used as an electron donor in a filter tank of the fluorine-rich black and odorous water body to reduce nitrate nitrogen into nitrogen gas to achieve denitrification. Meanwhile, lanthanum ions, cerium ions, calcium ions, iron ions and aluminum ions are complexed with phosphate ions and fluorine ions in the black and odorous water body to simultaneously remove fluorine and phosphorus.

The invention discloses an early-strength polycarboxylate superplasticizer and a preparation method thereof, and belongs to the technical field of concrete admixtures. Aiming at the problem of insufficient early strength performance of the existing polycarboxylate superplasticizer, through molecular structure optimization and early strength component collaborative design, isopentenyl polyglycol ether, unsaturated acid and unsaturated small monomers are used as polymerization main bodies, and calcium salt is introduced as an early strength component, so that the early strength performance of the polycarboxylate superplasticizer is improved. A product is prepared through segmented dropwise addition polymerization reaction in a specific initiation-reduction system; the main chain carboxyl of the water reducing agent ensures high water reducing rate, the side chain and the acylamino cooperate with the calcium salt to accelerate cement hydration, and through the dual mechanisms of carboxyl-calcium ion complexation and rapid dissolution and crystallization of calcium silicate, the final setting time of concrete is remarkably shortened, and the early strength of 1d, 3d and 7d is improved.

The invention belongs to the field of styryl copolymer materials, and relates to a functionalized styryl copolymer / metal ion hybrid material and a preparation method thereof. The hybrid material is composed of a styryl copolymer main chain A and a side group functional group, wherein the side group functional group comprises a proton-containing acidic substituent group B and a proton-containing acid amination metal ion complexing crown ether group C; wherein the molar content of the B is 1-55 mol% and the molar content of the C is 0.01-1.0 mol% based on 100 mol% of the total molar content of the structural unit of the A. According to the functionalized styryl copolymer / metal ion hybrid material, the proton-containing acidic substituent group B and the proton-containing acid aminated metal ion complexing crown ether group C are introduced, so that compared with a styryl copolymer material, the mechanical property and the optical property are obviously improved.

This invention provides a method for modifying hydrophilic polysulfone / polyethersulfone hollow fiber membranes based on an in-situ interfacial rearrangement-ion complexation mechanism, mainly comprising the following steps: (1) subjecting polysulfone / polyethersulfone to mild swelling aqueous phase treatment; (2) using hydrophilic polymers for in-situ enrichment at the interface; and (3) using polyvalent metal ions and polyamine-polyacid ion pairs for complexation. The advantage of this invention is that the pure water flux (PWF) of the separation membrane prepared by this invention, at an operating pressure of 0.1 MPa, is increased from 300 L·m⁻¹ before modification. ‑2 ·h ‑ Increased to 280–320 L·m ‑2 ·h ‑ Meanwhile, the membrane flux recovery rate (CIP) has been significantly improved from 60–70% to no less than 85%; in terms of BSA retention performance, it has been improved from 90% to ≥92%; more importantly, in a continuous operation test of up to 500 hours, the membrane performance degradation has been significantly reduced from 25% to less than 12%, demonstrating excellent long-term stability and antifouling ability.

This invention discloses a three-coordinate complexing agent, an all-iron flow battery negative electrode electrolyte, and a preparation method thereof, comprising a first complexing agent, a second complexing agent, and a third complexing agent; wherein the first complexing agent is any one of triethanolamine, N,N,N′,N′-tetra(2-hydroxyethyl)ethylenediamine, and triisopropanolamine; the second complexing agent is any one of N,N,N′,N′-tetra(2-hydroxyethyl)ethylenediamine, N-phosphonomethyliminodiacetic acid and its salt, triisopropanolamine, and triethanolamine; the first complex and the second complex are different substances; the third complexing agent is polyethylene glycol; the three-coordinate complexing agent obtained by this invention significantly improves the iron ion complexation saturation, inhibits side reactions such as hydrogen evolution, hydrolysis, iron deposition, and ligand transmembrane reactions, while significantly reducing the viscosity and flow resistance of the electrolyte, reducing pump consumption, accelerating ion diffusion and mass transfer, effectively reducing impedance and battery polarization, thereby improving coulombic efficiency, voltage efficiency, and energy efficiency.

The present application relates to a layered zirconium phosphate supported metal complex antibacterial agent material and a preparation method thereof, wherein the layered zirconium phosphate supported metal complex antibacterial agent material comprises a layered zirconium phosphate carrier, an inorganic salt containing antibacterial metal ions and a nitrogen-containing organic ligand. The present application prepares an antibacterial agent material with excellent stability, antibacterial property and dispersibility by loading the metal complex generated by the reaction of the inorganic salt containing antibacterial metal ions and the nitrogen-containing organic ligand on the layered zirconium phosphate carrier. The present application introduces the nitrogen-containing organic ligand to complex with the antibacterial metal ions to form a metal coordination polymer, which is different from the general form of the antibacterial metal ions. The combination mode of the complex state reduces the probability of metal ion precipitation, further avoids the occurrence of yellowing phenomenon, improves the dispersibility of the antibacterial metal ions, reduces the metal aggregation phenomenon, increases the contact area and probability of the metal with the bacteria, and thus improves the antibacterial efficiency.