815 results about "Acid group" patented technology

The invention provides a method for immobilizing phosphonic acid betaine and phosphonic acid on polystyrene, which comprises the following steps: taking quaternary ammonium cation containing glycidyl ether as a spacer arm, carrying out ring-opening reaction on phosphite ester and glycidyl ether connected with the side chain of polystyrene in the presence of an alkali reagent catalyst, grafting phosphonate on polystyrene, and then carrying out acid catalytic hydrolysis on phosphonate to obtain the phosphonic acid betaine and phosphonic acid immobilized on polystyrene. The phosphonic acid and the phosphonic acid group betaine are immobilized on the surface of the polystyrene. The effect of introducing phosphonic acid and phosphonic acid betaine on polystyrene is generated; the adsorbent can be used for adsorption, enrichment and separation of rare earth ions and heavy metal ions, and also has an anion exchange function.

The invention relates to an organic compound, a solar cell and application thereof. The organic compound is shown as a formula (1), wherein Ar is selected from any one of substituted or unsubstituted aryl with the ring-forming atom number of 6-50, substituted or unsubstituted heteroaryl with the ring-forming atom number of 5-50, a group shown as a formula (A) and a group shown as a formula (B), Ar'is selected from an electrically neutral organic group, and L is selected from a paraffin subunit with the carbon atom number of 1-10; r1 is an oxyacid group; n1 is selected from any integer of 1-3, and m1 is selected from any integer of 1-10; or the organic compound is an oxyacid radical salt of the compound as shown in the formula (1). The organic compound not only can be used as a passivation material, but also can be used as a hole transport material, and can improve the photoelectric conversion efficiency of a solar cell when being applied to preparation of the solar cell.

The invention discloses application of small molecules containing diphosphonic acid groups in preparation of hydrophilic inorganic nanoparticles, and relates to the technical field of preparation of inorganic nanoparticles. The method comprises the following steps: dispersing inorganic nanoparticles coated with a hydrophobic organic compound on the surface into tetrahydrofuran, dropwise adding into a small molecule solution containing a diphosphonic acid group, uniformly mixing, and adding diethyl ether to prepare the hydrophilic inorganic nanoparticles. The method is simple and convenient to operate, mild in condition, rapid in conversion, high in conversion rate, energy-saving and efficient, and the converted nano-particle freeze-dried powder is stable in property and easy to store and transport and has certain popularization value. The problems that in the prior art, an inorganic nanoparticle hydrophilic modification method is complex, and conversion efficiency is low are solved.

The invention provides a battery positive plate and a battery. The battery positive plate comprises a positive active material and a binder, and the binder is a product obtained by crosslinking a phenylboronic acid compound modified polyacrylic acid compound and a hydroxylated carbon nanotube. According to the battery positive plate, a three-dimensional conductive network binder based on crosslinking of a phenylboronic acid compound modified polyacrylic acid compound and a hydroxylated carbon nanotube is adopted, and the binder utilizes a multi-crosslinking mechanism between a phenylboronic acid group and the hydroxylated carbon nanotube (OHCNT) and between the phenylboronic acid group and positive active particles; a boroxane structure is formed through self-crosslinking of the boron oxide and the phenylboronic acid, and a special three-dimensional conductive network structure is formed, so that the mechanical strength and the conductivity of the binder and the cycle performance and the stability of the battery are improved; the discharge performance and the rapid charge-discharge capability of the battery can be improved, and the consumption of electrolyte can be reduced, so that the cycle life of the battery is prolonged.

The invention belongs to the technical field of hydrogen bond organic framework materials, and relates to a three-component hydrogen bond organic framework material as well as a preparation method and application thereof, the chemical formula is {C26H21O12P4. (CH6N3). (C10H12N4). (H2O)} n, and n is a positive integer. A structural unit belongs to a triclinic system, a space group is P-1, a molecular formula is C37H41N7O13P4, and each repeating unit comprises a water molecule, a G < + > cation, a DBpy < 2 + > cation and a H5TPE < 3-> molecule; amino groups on G < + > cations, amino groups on DBpy < 2 + > cations, deprotonated HPO3-groups in H5TPE < 3-> molecules and unprotonated phosphonic acid groups have a synergistic effect, and water molecules form a two-dimensional hydrogen bond network. According to the three-component strategy, the chemical and structural diversity of HOFs is greatly expanded, and the material performance is remarkably improved.

The invention provides a method for accurately regulating and controlling pores of an MXene material by utilizing a phosphonic acid ligand, which mainly comprises the following key steps of: directionally removing a main group element (A) layer of an MAX precursor by wet etching to obtain lamellar MXene, and then introducing a protonated quaternary amine compound intercalator to strip the MXene. And finally, carrying out functional modification and conversion by adopting a phosphonic acid ligand, and stably introducing phosphonic acid groups between layers and on the surface of MXene through solvothermal reaction to realize accurate regulation and control of interlayer spacing. The prepared material can realize efficient adsorption of uranyl in an acidic environment, shows high selectivity, high adsorption capacity and good acid stability and regeneration capacity to uranyl, provides a stable and efficient selective adsorption solution for treating high-acidity uranium-containing nuclear wastewater, and has a remarkable industrial application prospect.

Provided is a photosensitive resin composition having excellent low-temperature curability and capable of providing a cured resin film having sufficient solvent resistance or sufficient hardness. Also, provided are a color filter having excellent solvent resistance or excellent hardness, and an image display element having same. A photosensitive resin composition according to the present invention contains a copolymer (A), a reactive diluent (B), a photopolymerization initiator (C), and a solvent (D).　The copolymer (A) contains a structural unit (a), a structural unit (b), and a structural unit (c). The structural unit (a) has at least one selected from among an active methylene group having an alkoxycarbonyl group attached thereto, and an active methine group having an alkoxycarbonyl group attached thereto. The structural unit (c) has an acid group.

The invention relates to the field of water treatment, and discloses a scale and corrosion inhibitor for seawater circulating cooling water, which is prepared from phosphonic acid grafted maleic anhydride-acrylic acid copolymer, hydroxyethylidene diphosphonic acid, amino trimethylene phosphonic acid, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N- The anti-corrosion coating is prepared from the following raw materials: N, N-diethylaminomethyl-benzotriazole, gamma-aminopropyltriethoxysilane, zinc salt and a polyoxyethylene-polyoxypropylene block copolymer. The core of the invention is that all the raw material components form the thermo-sensitive polyelectrolyte compound through a self-assembly process. The compound is stably dispersed at low temperature by utilizing the cloud point effect of the block copolymer, and is subjected to phase change and preferential deposition on a high-temperature heat exchange surface, so that targeted and efficient delivery of various active components is realized. According to the invention, the problems of incompatibility of components and poor stability of a traditional compound agent are solved, the product has excellent storage stability, and efficient and synergistic corrosion and scaling control can be realized under high-temperature and high-salinity working conditions.

The invention discloses a preparation method of a lignite resin drilling fluid filtrate reducer, and relates to the technical field of petroleum and natural gas drilling engineering. The method comprises the following steps: carrying out superfine grinding on lignite, carrying out alkaline hydrolysis pretreatment on waste nylon PA66, alkalizing lignite powder, carrying out sulfonation reaction on the alkalized lignite powder and phosphorous acid to introduce phosphonic acid groups, carrying out cross-linking with tetrabutyl titanate to form a three-dimensional network structure, and adding a nano-montmorillonite suspension to realize physical enhancement. A reaction product is subjected to freeze-drying, a porous structure is reserved, and then the product and polyethylene glycol 400 are mixed and granulated. By utilizing humic acid functional group grafting, inorganic-organic composite cross-linking and waste raw material recycling technologies, the product still keeps excellent filtration loss control capability at the high temperature of 200 DEG C and in a saturated salt solution, the high-temperature and high-pressure filtration loss is less than or equal to 6.50 mL, the viscosity retention rate is greater than or equal to 92.8%, the lubricating coefficient reduction rate is greater than or equal to 48.5%, and the product has the advantages of temperature resistance, salt resistance, environmental protection and low cost, and is suitable for industrial production. And the method is suitable for deep oil-gas drilling engineering.

The present invention provides an ashless rust inhibitor and a preparation method therefor. The preparation method comprises the following steps: in a non-polar solvent, mixing dinonylnaphthalenesulfonic acid and dodecenylsuccinic acid to obtain mixed acid A; mixing polyene polyamine and the mixed acid A according to a molar ratio of (0.5-2.0):1, and adding deionized water and methanol for reaction until the pH value of the solution is neutral; and adding methylmethacrylate and base oil into the reacted system, carrying out heating distillation, and then carrying out reduced pressure distillation until no obvious distillate is generated, so as to obtain the ashless rust inhibitor. The present invention further provides an ashless rust inhibitor prepared by the method. The ashless rust inhibitor of the present invention integrates the advantages of a dinonylnaphthalenesulfonic acid group and a dodecenylsuccinic acid group at the molecular level, and has a better rust inhibition effect; in addition, the ashless rust inhibitor has a good synergistic effect with an extreme pressure antiwear agent.

The invention discloses an amphiphilic molecule as well as a preparation method and application thereof. The general formula of the chemical structure of the amphiphilic molecule provided by the invention is shown as a formula I: # imgabs0 #, R comprises a Lewis base group, X comprises at least one of hydrogen and halogen atoms, and n is an integer greater than or equal to 0. The amphiphilic molecule provided by the invention has a Lewis acid group and a Lewis base group at the same time, so that the amphiphilic molecule can be used for passivating two defects of perovskite crystal boundaries, namely anions with insufficient coordination and cations with insufficient coordination; therefore, when the amphiphilic molecule is used in a perovskite material, the conversion efficiency and the stability of perovskite can be remarkably improved.

The invention belongs to the technical field of solar cells, and relates to synthesis of an organic phosphonic acid micromolecule material and application of the organic phosphonic acid micromolecule material in perovskite solar cells, the micromolecule material adopts a phosphonic acid group as a aiming group, different carbazole aromatic nuclei as head groups, and alkyl chains with different lengths are connected with the head groups and the aiming group; when the small molecule material is used as a hole transport layer material in a perovskite solar cell device, the efficiency and the stability of the device can be effectively improved; the micromolecule material is applied to a perovskite solar cell system as an interface modification layer, good device performance is obtained, and the service life of a perovskite solar cell under a high-temperature illumination condition is prolonged; the photoelectric conversion efficiency exceeds 24%, and the preparation method of the phosphonic acid small molecule material is simple and easy to operate, and has wide application prospects and market potential.

The invention discloses an anti-pollution composite membrane, a preparation method thereof and a reverse osmosis membrane, and relates to the technical field of water treatment separation membranes, the anti-pollution composite membrane comprises a support membrane and a separation function layer formed on the support membrane; wherein the separation function layer comprises a polyamide crosslinking layer containing an acyl halide group and a compound containing an aminophosphonic acid group, and an amino group in the compound containing the aminophosphonic acid group and the acyl halide group in the polyamide crosslinking layer are bonded with each other through an amido bond. According to the anti-pollution composite membrane provided by the invention, the polyamide crosslinking layer containing the acyl halide group and the compound containing the amino phosphonic acid group are bonded through the amido bond, so that the phosphonic acid group is grafted on the polyamide crosslinking layer, the hydrophilicity of the polyamide crosslinking layer is improved, and the membrane is easy to form a hydration layer when being subjected to separation treatment; therefore, pollutants are prevented from being adsorbed or deposited on the surface of the membrane, the anti-pollution capacity of the membrane is improved, and the service life of the membrane is prolonged.

This proton conductive electrolyte material has a chemical structure which comprises an acidic polymer (2) that contains an oxo acid group represented by -POx(OH)y (wherein x and y are each 1 or more), having a phosphorus atom, and at least one saturated hydrocarbon group in the main chain, and a basic polymer (3) that contains a basic functional group, while having at least one aromatic ring in the main chain, wherein an attractive interaction occurs between the oxo acid group and the basic functional group. This fuel cell is provided with the proton conductive electrolyte material. This method for producing a proton conductive electrolyte material includes: preparing a first solution by means of an acidic polymer and a mixed solvent; preparing a second solution in which a basic polymer is dissolved in a solvent; and preparing a mixed solution in which the first solution and the second solution are mixed. With respect to the preparation of the first or second solution, a mixed solvent which contains an inhibitor that is capable of inhibiting rapid aggregation of the oxo acid group and the basic functional group is prepared.

Provided is a fluororubber composition comprising a fluororubber (a), a crosslinking agent (b), and an organic acid (c), wherein the organic acid (c) comprises at least one organic acid selected from the group consisting of C3-10 organic acids each having one acid group in the molecule and C2-10 organic acids each having two or more acid groups in the molecule.

The present invention relates to an anti-fouling, semi-permeable membrane comprising a porous support layer, a thin film composite (TFC) layer formed on a surface of the support layer, and a cross-linked polyvinyl alcohol (PVA) layer formed on top of the TFC layer, wherein the cross-linked PVA layer is the reaction product of PVA and a cross-linking agent, said cross-linking agent being a polybasic acid comprising three or more acid groups or precursors thereof. The obtained membrane shows a high water flux and a low roughness suitable for an effective membrane notable for feed solution having a tendency of fouling the membrane.

Processing aids and lubricants with free acid groups and relatively high molecular weights are used as process aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined, or can be used with prior art processing aids, depending on the end use application. The novel materials and process provide a useful alternative to the sole use of fluorine-based polymer processing aids.

A pigment dispersion liquid containing a copolymer (A) having a first segment (a1) derived from a nitrogen-containing polymerizable unsaturated monomer having a tertiary amino group and / or a nitrogen-containing heterocyclic group, and a second segment (a2) derived from a polymerizable unsaturated monomer having a polyoxyalkylene chain, a hydrocarbon group-containing acidic compound (B), a pigment (C), and an aqueous solvent (D), and a hydrocarbon group-containing acidic compound (B) having a C5-23 saturated or unsaturated hydrocarbon group (b1) and at least one acid group (b2) selected from the group consisting of a carboxyl group, a phosphate group, a sulfonic acid group, and a phenol group.

The invention belongs to the technical field of fluorescent probes, and particularly discloses a high-sensitivity visual Fe < 3 + > / Al < 3 + > fluorescent probe Rh and a preparation method and application thereof.The high-sensitivity visual Fe < 3 + > / Al < 3 + > fluorescent probe Rh is characterized in that cyanuric chloride and sulfanilic acid are used as raw materials, and an intermediate L1 is synthesized through an alkylation reaction; synthesizing an intermediate L2 by using the intermediate L1 and p-hydroxybenzaldehyde as raw materials through alkylation reaction; the intermediate L2 and rhodamine B hydrazide are subjected to a Schiff base reaction, and the triazine-rhodamine B hydrazide derivative fluorescent probe Rh is obtained. According to the fluorescent probe Rh prepared by the invention, the water solubility is increased due to the introduction of a sulfanilic acid group; the fluorescence spectrum test of the probe Rh and 17 common metal ions shows that the probe Rh has a remarkable fluorescence enhancement effect on Fe < 3 + > and Al < 3 + >; an ultraviolet-visible absorption curve test shows that a new peak appears at 560 nm, the absorbance is remarkably increased, and at 350 nm, Fe < 3 + > has an obvious absorption peak but Al < 3 + > does not exist, and Fe < 3 + > and Al < 3 + > can be distinguished.

The invention belongs to the technical field of batteries, particularly relates to the technical field of lithium ion batteries, and particularly relates to a non-aqueous electrolyte which comprises a compound shown in a formula I and a compound shown in a formula II, in the formula I, R1, R2, R3 and R4 are independently selected from any one of a fluorine atom, a difluorophosphoryloxy group, a methanesulfonic acid group and a trifluoromethanesulfonic acid group respectively, and R1, R2, R3 and R4 are independently selected from any one of a fluorine atom, a difluorophosphoryloxy group, a methanesulfonic acid group and a trifluoromethanesulfonic acid group; in the formula II, R5, R6, R7 and R8 are respectively and independently selected from any one of fluorine atoms, trifluoromethyl, and C1-C3 alkyl sulfonic acid groups which are substituted by fluorine atoms or not substituted by fluorine atoms; based on the total mass of the non-aqueous electrolyte, the mass percentage of the compound in the formula I is A, the mass percentage of the compound in the formula II is B, A is more than or equal to 0.01% and less than or equal to 10%, B is more than or equal to 0.05% and less than or equal to 5%, and A / B is more than or equal to 0.01 and less than or equal to 50. According to the present invention, the compound represented by the formula I and the compound represented by the formula II are matched for use in the electrolyte, such that the cycle performance and the high-temperature storage performance of the electrochemical device can be simultaneously improved.

The invention relates to the technical field of all-vanadium redox flow batteries, and discloses a supported electrolyte of all-vanadium redox flow battery positive and negative electrolyte and a preparation method thereof, and the supported electrolyte comprises an aqueous solution containing vanadium ions, sulfonate ions, sulfate ions and phosphonic acid groups. The sulfonic acid group (-SO3H) has strong polarity and high ionization degree, after the sulfonic acid group (-SO3H) is mixed with the phosphonic acid group (-PO3H2) and sulfuric acid, the ionic environment of the electrolyte can be optimized, the activation energy of V (II) / V (III) and V (IV) / V (V) electricity on electron transfer is reduced, and compared with an existing sulfuric acid supported electrolyte, the reversibility of electrochemical reaction is remarkably improved, and the electrochemical activity of the electrolyte is enhanced; meanwhile, phosphonic acid groups have high complexing ability, can form stable chelates with vanadium ions and can form complexing-dispersing synergy with sulfonic acid groups, the solubility of the vanadium ions is improved, and agglomeration and crystallization of the vanadium ions are inhibited.

One embodiment of the present invention relates to: a composition containing particles having a refractive index of 1.8 or more, a polymer compound represented by formula (1), and a solvent; a liquid crystal film, a film or a display device using the composition; and a dispersant containing a polymer compound represented by formula (1). In formula (1), the whole has one or more mesogenic structures, and m + n satisfies 2-10. A1 represents at least one group selected from the group consisting of an acid group, a urea group, a urethane group, a group having a coordinating oxygen atom, a group having a basic nitrogen atom, a phenol group, an alkyl group, an aryl group, a group having an alkyleneoxy chain, an imide group, an alkoxycarbonyl group, an alkylaminocarbonyl group, a carboxylate group, a sulfonamide group, a heterocyclic group, an alkoxysilyl group, and an epoxy group; and P1 represents a polymer chain, a monovalent group of a group selected from the group consisting of an isocyanate group and a hydroxyl group. # imgabs0 #

The purpose of the present invention is to provide a method for forming a multilayer coating film which makes it possible to form a multilayer coating film having excellent metallic mottling resistance. The method for forming a multilayer coating film comprises: (1) a step for applying a first aqueous coating material (P1) on an object to be coated to form a first coating film; (2) a step for applying a second aqueous colored coating material (P2) on the first coating film to form a second colored coating film that contains a binder component (AP2) and lustrous pigment (BP2); (3) a step for applying a clear-coat coating material (P3) on the second colored coating film to form a clear-coat coating film; and (4) a step for heating a multilayer coating film that includes the first coating film, the second colored coating film, and the clear-coat coating film so as to cure the multilayer coating film all at once. The first aqueous coating material (P1) contains a compound (A) containing a hydroxyl group and an acid group and that has an acid value of from 50 to 150 mg KOH / g, a hydroxyl value of from 100 to 300 mg KOH / g, and a weight-average molecular weight of from 500 to 8000, a film-forming resin (B), and a crosslinking agent (C).

The invention relates to the technical field of admixtures for cement concrete, in particular to a polycarboxylic acid admixture for enhancing low-activity admixtures and a preparation method thereof, the polycarboxylic acid admixture is formed by polymerizing the following components: polyether macromonomer, unsaturated carboxylic acid I, exciting functional monomer A, slump retaining functional monomer B, rheological functional monomer C, oxidizing agent, reducing agent, chain transfer agent and water; the exciting functional monomer A, the slump retaining functional monomer B and the rheological functional monomer C are sequentially added, and the exciting functional monomer A is formed by polymerizing polyhydric alcohol, unsaturated carboxylic acid II, an initiator, phosphonic acid and an alcohol amine small monomer. Through molecular design, key functional groups such as phosphonic acid groups, amino groups and sulfonic acid groups are innovatively introduced into a polycarboxylic acid main chain, so that the polycarboxylic acid admixture has multiple synergistic functions of reducing the cement consumption, effectively activating a low-activity cementing material, stably improving the working performance of concrete and the like.

The invention relates to the technical field of drag reducer preparation, and in particular to a method for producing a salt-resistant drag reducer for oil well fracturing. S1.1, weighing the following raw materials in parts by weight: 27-32 parts by weight of a modified polymer, 0.6-1.1 parts by weight of a cross-linking agent, 0.1-0.3 parts by weight of an antioxidant, 2-6 parts by weight of an acetate buffer, 0.6-0.8 parts by weight of a surfactant, 0.02-0.04 parts by weight of a benzalkonium chloride biocide, and 0.2-0.4 parts by weight of a bentonite suspending agent; wherein, the modified The polymer is prepared by copolymerization of acrylamide, crotonic acid and acrylic acid phosphonate in a mass ratio of 7:2 to 4:10 to 13; S1.2, adding the above raw materials and continuously stirring to obtain a salt-resistant drag reducer; crotonic acid, acrylic acid phosphonate and acrylamide are used to prepare a modified polymer, and carboxyl and phosphonic acid groups are introduced into the polyacrylamide, thereby enhancing the water solubility of the polymer and, at the same time, improving the coordination ability of the modified polymer with the zirconium ions in the cross-linking agent, thereby improving the salt resistance and drag reduction effect of the modified polymer.

The invention provides a viscosity reduction type water reducer as well as a preparation method and application thereof. The water reducer is prepared by the following steps: firstly, alternately polymerizing styrene and maleic anhydride to obtain a low-molecular-weight styrene-maleic anhydride polymer, and then respectively grafting a phosphonic acid monomer and a polyether monomer into a main chain of the styrene-maleic anhydride polymer through reaction, the number average molecular weight of the styrene-maleic anhydride polymer is 1000 to 2000. Through an esterification reaction, a phosphonic acid monomer and a polyether monomer are grafted to a main chain formed by a styrene-maleic anhydride alternating polymer, and a phosphonic acid group and a hydrophobic epoxypropane structural unit are introduced into a water reducing agent structure, so that the surface tension of the water reducing agent is further reduced; the wetting effect and a certain air entraining effect of the water reducing agent on cement particles are improved, the sliding resistance among the cement particles is reduced, and the viscosity of concrete is reduced to a certain extent.

The invention discloses a low molecular weight composite anti-pollution agent for well cementation, and relates to the technical field of oilfield chemistry, the low molecular weight composite anti-pollution agent is prepared by mixing the following components by mass: 60-85 parts of a low molecular weight phosphonic acid polymer solution, 15-40 parts of a silicate solution, the silicate solution is a low modulus silicate solution with a mass fraction of 25%-45%, and the balance of water. The low-molecular-weight phosphonic acid polymer solution is a polymer solution with the mass fraction of 35%-60% prepared from a phosphonic acid group-containing monomer, a rigid group-containing monomer and a carboxylic acid group-containing monomer; according to the present invention, the stable slurry can be formed after the drilling fluid is added, the anti-pollution requirement can be met under the low addition amount condition, the use amount of the spacer fluid can be significantly reduced, and compared with the traditional retarder type anti-pollution agent for prolonging the thickening time by using the retarding effect, the anti-pollution agent has the good anti-pollution effect; the method also has very obvious effects on inhibiting the phenomena of swelling and core wrapping and reducing the consistency of polluted mixed slurry.

The invention discloses an amphiphilic molecule as well as a preparation method and application thereof. The general formula of the chemical structure of the amphiphilic molecule provided by the invention is as shown in formula I: # imgabs0 #, R comprises a Lewis basic group, X1, X2, X3, X4 and X5 independently comprise at least one of hydrogen and halogen atoms, X1, X2, X3, X4 and X5 are not hydrogen at the same time, and n is an integer greater than or equal to 1. The amphiphilic molecule provided by the invention has a Lewis acid group and a Lewis base group at the same time, so that the amphiphilic molecule can be used for passivating two defects of perovskite crystal boundaries, namely anions with insufficient coordination and cations with insufficient coordination; therefore, when the amphiphilic molecule is used in a perovskite material, the conversion efficiency and the stability of perovskite can be remarkably improved.

The invention provides a polymer, a preparation method, a dispersant, a positive electrode slurry, a positive electrode plate, a secondary battery and an electric device, the polymer comprises a structure represented by a formula I, X comprises at least one of a carboxyl group, an ester group, a sulfonic acid group, a sulfonate group, a phosphate group and a phosphate group, X'comprises a non-polar group, L comprises structural units represented by a formula II and a formula III, wherein R1 comprises at least one of a C1-12 alkylene group, a C6-12 aryl group, and # imgabs0 #, R2 comprises at least one of a C1-12 alkylene group, a C6-12 aryl group, # imgabs1 #, R3 comprises at least one of a C1-12 alkylene group, a C6-12 aryl group, # imgabs2 #, R4 comprises at least one of a C1-12 alkylene group, a C6-12 aryl group, and # imgabs3 #, R5 comprises hydrogen or a C1-3 alkyl group, where EO represents-CH2-CH2-O-, PO represents-CH (CH3)-CH2-O-, CH2 represents-CH3, CH2 represents-CH3, CH2 represents-CH3, CH2 represents-CH3, CH2 represents-CH3, CH2 represents-CH3 m1, m2, m3 and m4 are respectively and independently integers between 1 and 10, and n1, n2, n3 and n4 are respectively and independently integers between 0 and 10.

The invention discloses a composite bipolar molecule for a water-soluble dual-electrode flow battery system as well as a preparation method and application of the composite bipolar molecule, and the composite bipolar molecule for the water-soluble dual-electrode flow battery system is prepared by the following preparation steps: S1, taking nitroxide free radical piperidinol and acyl chloride as raw materials, and adding a catalyst to carry out acylating chlorination reaction; and S2, carrying out a quaternization reaction with 1-propanesulfonyl-4, 4 '-dipyridyl to synthesize the water-soluble bipolar composite molecular structure. The bipolar composite molecule has the beneficial effects that the bipolar composite molecule can be used for positive and negative electrode materials of a water-soluble organic flow battery system, so that the influence caused by cross contamination between electrode materials can be avoided, and the stability of battery circulation is improved. Meanwhile, the organic dual-electrode flow battery system is suitable for a battery environment using an in-situ generated electrolyte, has the advantages of low cost, stable charging and discharging performance, high safety, high active material solubility and the like, and can meet the large-scale energy storage requirement.