158 results about "Crown ether" patented technology

The invention discloses a crown ether grafted polyarylether sulfone ion separation membrane as well as a preparation method and application thereof, and belongs to the technical field of ion separation membranes, collaborative optimization is realized through crown ether accurate grafting and ultrathin ordered membrane formation: a main chain of polyarylether sulfone is grafted with 4 '-aminobenzo-12-crown-4 to form an inherent channel adapted to Li, and the specific surface area of the main chain is increased; the ultrathin film is prepared by a water surface spreading method, and the ion transmission path is shortened. Finally, in a LiCl / MgCl system, Liion flux has high selectivity, high permeation-high selectivity cooperation is preliminarily realized, the chemical synthesis step can be amplified to a kilogram level, and after a DPAES-g-CE / dichloromethane solution is dropwise added to the water surface, the DPAES-g-CE / dichloromethane solution is rapidly spread to form a film without precise equipment; the raw materials are industrial-grade monomers and have no toxic residues, the membrane can be recycled and reused through dichloromethane, the equipment cost is reduced by about 90%, and industrialization is easy; the main chain of the polyaryl ether sulfone is high in rigidity and resistant to high temperature and chemical corrosion; crown ether grafting avoids molecular chain agglomeration, and the swelling rate is far lower than that of a traditional sulfonated membrane.

The invention provides a crown ether functionalized covalent organic framework material and a preparation method and application thereof, the crown ether functionalized covalent organic framework material has a structure as shown in a general formula A. Benzocrown ether functional groups are introduced into the structure of the covalent organic framework material through a bottom-to-top method for adsorption separation of lithium ions; and the lithium adsorption capacity is good.

The invention relates to the field of adsorption materials, and discloses a lithium ion adsorbent and a preparation method and application thereof. The lithium ion adsorbent comprises a polyvinyl chloride molecular chain and a polymer molecular chain A, wherein the polymeric molecular chain A comprises a structural unit I from crown ether containing vinyl and a structural unit II from a vinyl silane modified lithium ion sieve. The vinyl silane modified lithium ion sieve in the lithium ion adsorbent can be connected with a polymer molecular chain through a chemical bond, so that the lithium ion sieve can be uniformly dispersed on a polymer skeleton, and the lithium ion adsorbent has excellent structural stability, high adsorption capacity and high magnesium-lithium selectivity; and the solution loss rate of the lithium ion sieve is obviously reduced.

The technology of the present disclosure generally relates to the field of power storage devices, and more specifically to a solid electrolyte, an electrode, a solid-state battery, and a method for producing the same. An aspect of the present disclosure relates to a process for producing a solid electrolyte, comprising the steps of: - contacting, in the presence of a catalyst: - a polymer precursor compound comprising polyethylene glycol (PEG) and / or polytetrahydrofuran (PTHF), wherein the polymer precursor compound comprises on average per polymer precursor molecule, -at least 2.0 alkoxysilyl functional groups, with a functionality of at least 2.0, preferably at least 2.5, preferably at least 3.0; and / or -at least 1.0 alkoxysilyl functional groups, with a functionality of at least 3.0; - optionally, an organo-tri-alkoxy silane, an organo-tetra-alkoxy silane, and / or a mixture thereof comprising a metal ion (M+) chelating moiety being a cyanurate, a crown ether, an aza-crown ether, a thia-crown ether, a cryptand, a carbamate, a cyano group, a thiocyanate group, or a metallacrown,, - a metal (M+) salt, preferably does the metal salt comprises Li+, Na+, Mg+, Ca+, Al+, and / or a combination thereof, preferably lithium (Li+); - a solvent, preferably an organic solvent; and, - optionally, an ionically conductive compound; thereby obtaining a solid electrolyte; - optionally, drying the obtained solid electrolyte.

The invention relates to a crown ether-loaded solid bubble lithium adsorbent as well as a preparation method and application thereof, belongs to the technical field of lithium adsorption, and solves the problems of low adsorption rate, low adsorption capacity, poor ion selective adsorbability, complex synthesis process, difficulty in separation and recovery, poor regeneration capacity and water environment pollution during lithium extraction of an existing crown ether material. The method comprises the following steps: activating solid bubbles by adopting an alkaline solution; modifying the activated solid bubbles by using a coupling agent; and reacting a crown ether monomer with a lithium salt in a solvent, adding the modified solid bubbles, a catalyst, a cross-linking agent and an initiator, continuously reacting, carrying out solid-liquid separation, washing, drying and eluting. The method is simple and environment-friendly, the stably immobilized crown ether is introduced to the surface of the solid bubble through chemical grafting, and the lithium adsorption performance of the crown ether is improved; the solid bubbles with low density and high stability can endow the adsorbent with the self-floating characteristic, the regeneration performance of crown ether is remarkably improved, and pollution to the water environment is reduced.

This application discloses a crown ether modified perfluorosulfonic acid resin, its preparation method, its application, and an ion exchange membrane. The main chain of the crown ether modified perfluorosulfonic acid resin is a perfluorocarbon chain. The crown ether modified perfluorosulfonic acid resin includes repeating unit A, which is shown in formula (1): Formula (1); In formula (1), R0 is a crown ether group, a is a positive integer from 0 to 6, and b is a positive integer from 2 to 5. This application can effectively improve the persistence of the ion exchange membrane's free radical quenching effect, while also improving the oxygen resistance of the ion exchange membrane.

The application discloses a preparation method of perfluoroalkyl aryl sulfide, and a structural formula of the perfluoroalkyl aryl sulfide is shown as formula (I); the method comprises the following steps: firstly, obtaining corresponding aryl sulphenyl chloride by chlorination of thiophenol; under the condition that fluoride and crown ether exist, obtaining perfluoro-1,1-dimethylbutyl negative ion by addition of D-2 ‑ And the aryl sulphenyl chloride added is subjected to a nucleophilic substitution reaction to synthesize a product (1,1,1,3,3,4,4,5,5,5-decafluoro-2-trifluoromethylpent-2-yl)(aryl)sulfide. The application adopts a reaction strategy of efficient coupling of thiophenol and perfluoroalkyl, and can be used for preparing various fluorine-containing benzene sulfide compounds.

The invention provides a 1, 4-diaza-butanetriene compound as well as a synthesis method and application thereof, and belongs to the technical field of organic synthesis. The preparation method comprises the following steps: carrying out a first reaction on a compound 1 and a compound 2 in a solvent A, removing the solvent A after the reaction is finished, extracting with benzene or toluene, filtering, mixing with 12-crown ether-4, and stirring to obtain a compound 3; the synthesis method of the compound 3 provided by the invention is high in yield, simple to operate, mild in reaction, simple in required reaction condition control and high in speed. The obtained compound 3 has excellent stability and can be used for key intermediates in various organic reactions, such as preparation of alpha-diimine ligands.

This invention discloses a liquid-liquid extractant for separating chloride ions, its preparation method, and its application, belonging to the field of industrial wastewater treatment and resource utilization technology. This invention introduces a diaza-18-crown-6-ether fragment into the calix[4]pyrrole skeleton via a Click reaction, successfully preparing a diaza-18-crown-6-ether-bridged calix[4]pyrrole acceptor. This acceptor utilizes the strong coordination ability of crown ethers to alkali metal cations and the strong binding ability of calix[4]pyrrole to chloride ions, exhibiting excellent binding ability to alkali metal chlorides, especially showing extremely high selectivity for sodium chloride. Based on this performance, the compound can be used as a liquid-liquid chloride ion extractant in aqueous solutions. This extractant requires no co-extractant during chloride ion extraction, has an extraction efficiency >99%, and the extraction process is simple and rapid. Furthermore, the extractant can be recycled by reverse extraction of alkali metal chlorides in the organic phase using pure water, demonstrating good application value and broad development prospects in the chloride ion treatment of industrial wastewater.

The invention discloses an ordered ion channel polyamide nano composite membrane, a preparation method and application, relates to the field of lithium magnesium membrane separation, and aims to solve the problem of poor selectivity in the prior art. The technical scheme is as follows: amino benzo crown ether is covalently grafted on an ultrafiltration base membrane in situ through diazotization-coupling reaction; then, a polyamide compact layer is prepared on the crown ether nano layer subjected to in-situ self-assembly through interfacial polymerization, and the polyamide nano composite membrane with the ordered ion transmission channel is jointly constructed. The residual amino groups on the surface of the in-situ covalent grafted crown ether nano layer can also participate in interfacial polymerization reaction, so that the ordered ion channel crown ether macromolecular layer and the polyamide compact layer are connected through chemical bonds to jointly form the polyamide nano composite membrane with the ordered ion transmission channel. And the method is suitable for extracting lithium from the salt lake brine.

This invention discloses a method for preparing and analyzing trans-4-aminocyclohexylacetic acid. The preparation method is as follows: 4-nitrophenylacetic acid undergoes catalytic hydrogenation in a solvent, followed by filtration. The filtrate is then treated with acid to obtain a 4-aminophenylacetic acid salt solution. The collected catalyst is activated. The 4-aminophenylacetic acid salt solution is mixed with isopropanol, barium hydroxide, tetrabutylammonium bromide, 18-crown ether-6, and dibutyl phthalate. The activated catalyst is then added to initiate a catalytic hydrogenation reaction. After the reaction, the reaction solution is cooled and filtered. The resulting solid is mixed with a preheated dilute sulfuric acid solution and stirred to form a slurry. The mixture is then filtered, and the filtrate is neutralized and filtered again. The collected filtrate is concentrated and crystallized. The crystallized precipitate is washed and dried to obtain trans-4-aminocyclohexylacetic acid. The method provided by this invention has high reaction efficiency, mild conditions, and is suitable for industrial production. It yields high product purity and reliability. Furthermore, the analytical method provided by this invention is accurate and reliable.

The application discloses a cross-linked polyaryl piperidine anion exchange membrane and a preparation method and application thereof, and relates to the technical field of anion exchange membranes. The anion exchange membrane takes polyaryl piperidine as a skeleton, introduces crown ether structure and a cross-linked network, and solves the technical problem that the balance between the hydroxyl ion conductivity and the dimensional stability is difficult in the existing anion exchange membrane. The anion exchange membrane comprises a specific structure of a repeating unit, is prepared through Friedel-Crafts superacid catalytic polymerization, Menshutkin reaction functionalization and Michael addition reaction cross-linking, and has excellent hydroxyl ion conductivity, dimensional stability, chemical stability and mechanical strength. The preparation method is simple in operation, fast in polymerization rate, and high in conversion rate, does not need to strictly control the temperature and oxygen of a reaction environment, is suitable for the field of water electrolysis hydrogen production, especially suitable for an anion exchange membrane water electrolysis system, and has a wide industrial application prospect.

The application provides a high-styrene solution polymerized styrene-butadiene rubber and a preparation method and application thereof, and the preparation method comprises the following steps: mixing styrene, butadiene, an initiator, a structure regulator and a non-polar solvent, and performing a polymerization reaction to obtain solution polymerized styrene-butadiene rubber; wherein the structure regulator comprises at least two of t-butoxy sodium, t-amyl oxy sodium, 2,3-dimethyl-3-pentanol sodium and ethylene glycol disodium, and a crown ether. By using the composite structure regulator, the application can prepare a random high-styrene content solution polymerized styrene-butadiene rubber, and the rubber almost does not contain styrene blocks, and the content of vinyl in the rubber can be adjusted by the addition amount of the structure regulator. Therefore, the solution polymerized styrene-butadiene rubber prepared by the application has good strength and hardness due to the high styrene content, and the random microstructure reduces the glass transition temperature and heat build-up of the raw rubber, and is suitable for the manufacturing of high-performance tires such as new energy vehicle tires.

The invention discloses a hierarchical pore UiO-66 supported crown ether composite material, a preparation method thereof and application of the hierarchical pore UiO-66 supported crown ether composite material in adsorption and extraction of 6Li < + > from complex systems such as salt lake brine. The preparation method comprises the following steps: preparing terephthalic acid, 2-aminoterephthalic acid and a zirconium source through a solvothermal method to obtain a mixed ligand UiO-66, and then pyrolyzing the mixed ligand UiO-66 in an air atmosphere to obtain the hierarchical pore UiO-66; the hierarchical pore UiO-66 and a crown ether solution are mixed and stirred to react for a period of time, then solid-liquid separation is carried out, solids are collected, and the hierarchical pore UiO-66 loaded crown ether composite material is obtained after cleaning and drying. The hierarchical pore UiO-66 loaded crown ether composite material has the advantages of high specific surface area, high dispersion of crown ether adsorption sites, high crown ether loading capacity, high selectivity of 6Li < + > metal ions and the like, and can realize one-step enrichment of 6Li < + > metal ions in complex systems such as salt lake brine.

Treatment fluids and methods for dissolving titanium-iron oxides and iron oxides in a wellbore. A treatment fluid includes an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof, an acid and / or acid-generating agent, and an aqueous base fluid. The treatment fluid contacts a titanium-iron oxide and / or iron oxide to dissolve the titanium-iron oxide and / or iron oxide.

This invention relates to the field of nanofiltration membrane technology, and more particularly to a crown ether-modified positively charged polyamide / carbon nanotube nanofiltration membrane, its preparation method, and its applications. The nanofiltration membrane is constructed by attaching a carbon nanotube interlayer to a substrate membrane, followed by the preparation of a crown ether-modified polyamide membrane layer on the carbon nanotube layer via interfacial polymerization. Further, positively charged molecules are grafted onto the membrane surface, resulting in a composite functional structure where the surface exhibits the positive charge of the grafted molecules, the internal lithium-ion recognition properties of the crown ether, and the conductivity of the carbon nanotubes at the bottom. The positively charged layer of this nanofiltration membrane possesses a strong size sieving effect and Donan repulsion effect for positively charged divalent magnesium ions, while the crown ether provides a dedicated channel for lithium ions, enabling rapid lithium-ion transport under electro-driven conditions. This endows the nanofiltration membrane with the characteristic of simultaneously "intercepting magnesium ions and allowing lithium ions to pass through," thereby achieving highly efficient lithium-magnesium separation applications.

The invention discloses a super capacitor electrolyte and a super capacitor, and relates to the technical field of super capacitors, the super capacitor electrolyte comprises an electrolyte, a solvent and a functional additive; the electrolyte comprises spiro quaternary ammonium tetrafluoroborate and triethyl methyl ammonium tetrafluoroborate; the solvent comprises acetonitrile and sulfolane; the functional additive is a compound with a crown ether structure prepared through a thiol-ene click reaction; the addition amount of the functional additive is 1-10% of that of the solvent. The supercapacitor electrolyte system can resist high voltage and has wide temperature adaptability, that is, the supercapacitor electrolyte system has good high temperature resistance and low temperature resistance, so that the application requirement of a supercapacitor in a complex and severe environment is met.

This invention discloses a eutectic material with ion-stimulated fluorescence response and its preparation method. The eutectic material is a co-crystallized compound formed by a fluorescent cyclophenone and a crown ether through a host-guest interaction. The eutectic material and its preparation method provided by this invention utilize a fluorescent cyclophenone as the host and a crown ether as the guest, and the two are combined through a host-guest interaction to obtain the eutectic material. This material not only possesses ion-stimulated fluorescence response characteristics but also has advantages such as high spatiotemporal resolution and good sensitivity.

An object of the present disclosure is to provide a membrane electrode assembly excellent in durability.SOLUTION: The present embodiment is a membrane electrode assembly, wherein the membrane electrode assembly comprises a metal ion selected from a cerium ion and a manganese ion, and a crown ether compound or a salt thereof capable of forming a clathrate compound with the metal ion, the cathode catalyst layer comprises an electrode catalyst and an electrolyte, the electrode catalyst is a metal-supporting carrier in which metal particles having catalytic activity are supported on a carrier having pores, the surface area inside / outside ratio is 1.20 or less, and the particle number inside / outside ratio is 0.70 or less.SELECTED DRAWING: None

The invention discloses p-toluenesulfonic acid 8-tert-butyl diphenyl silyloxy-7-methyl octyl ester as well as a synthesis method and application thereof, and relates to the technical field of biopesticides. The preparation method comprises the following steps: taking 8-bromocaprylic acid as an initial raw material, and firstly reacting with t-BuOK and 18-crown ether-6; then reacting with pivaloyl chloride to generate acid anhydride, and then carrying out acylation reaction with 4-benzyl oxazolidine-2-ketone; then carrying out diastereoselective methylation; then, NaBH4 reduction is carried out; carrying out hydroxyl protection; then carrying out hydroboration oxidation reaction; and then carrying out TsCl sulfonylation, so as to synthesize the p-toluenesulfonic acid-8-tert-butyl diphenyl silyloxy 7-methyl octyl ester. The optical purity of the (S)-p-toluenesulfonic acid 8-tert-butyl diphenyl silyloxy-7-methyl octyl ester synthesized in the invention reaches 98%, and the optical purity of the (R)-p-toluenesulfonic acid 8-tert-butyl diphenyl silyloxy-7-methyl octyl ester synthesized in the invention also reaches 98%.

The application discloses a method for preparing di-tert-butyl dicyclohexyl-18-crown-6 by hydrogenating di-tert-butyl benzene-18-crown-6, wherein the catalytic system comprises a high-loading rhodium catalyst with a content of 3-10 wt% and a low-loading rhodium catalyst with a content of 0.05-1 wt%, which are prepared respectively and physically mixed to form active site distribution with different metal surface densities, and the catalyst is prepared by a deposition precipitation method so that Rh particles are uniformly dispersed on the surface of an alumina carrier. The system can realize efficient aromatic crown ether hydrogenation under mild conditions and has a good industrial application prospect.

The invention discloses a bifunctional group copolymerization separation membrane with a main chain containing crown ether as well as a preparation method and application of the bifunctional group copolymerization separation membrane. According to the method, 2, 2 '-bis (3-sulfonated propoxy) biphenyl disodium and isatin are used as monomers, a bifunctional material with a main chain containing crown ether is prepared through a superacid catalyzed polycondensation reaction under the condition of a certain reaction temperature, and a pure product is obtained through a large amount of water washing; secondly, preparing the prepared sample into a film through a non-solvent phase transfer method. The prepared bifunctional group copolymerization separation membrane material with the main chain containing crown ether shows relatively good ion exchange capacity, permeation selectivity and stability for lithium element in waste liquid, is simple and convenient to operate and controllable in cost, and shows a good application prospect.

This invention discloses a low-freezing-point small-molecule thermoresponsive color-changing smart window, its preparation method, and its applications. The small molecule has the structure of Formula 1, where R is independently selected from [−(CH2)]. a ] b -OCH3, a is 1 or 2; b is 2 to 10. This invention encapsulates a molecular aqueous solution of Formula 1 with specific concentrations of different metal cations within two glass layers to create a smart dynamic window capable of modulating light and heat transfer. The phase transition temperature of the smart dynamic window can be controlled by complexing specific metal ions with the crown ether cavity, and it possesses a low freezing point under the influence of salt ions, allowing it to be used in relatively harsh environmental conditions. By using simple and economical raw materials, the smart dynamic window of this invention represents a technological leap towards expanding into intelligent management systems in modern buildings.

The invention belongs to the field of selective adsorbents, and particularly relates to a rubidium and cesium ion selective adsorbent based on a graphene composite material and application thereof.The rubidium and cesium ion selective adsorbent is prepared by conducting surface carboxyl activation and crown ether grafting on the surface of a three-dimensional cross-linked graphene skeleton to obtain a crown ether functionalized graphene composite material; and performing in-situ growth of copper ferrocyanide nanoclusters on the crown ether functionalized graphene composite material. The rubidium cesium ion selective adsorbent realizes efficient selective adsorption of Rb < + > and Cs < + >, reaches adsorption equilibrium within 30 min in simulated high-level liquid waste, has Cs < + > and Rb < + > saturated adsorption capacities of 185 mg / g and 142 mg / g respectively, and has excellent acid-base stability and electrochemical regeneration capacity.

The application relates to the technical field of purification or refining of silicon compounds, in particular to a high-purity quartz sand alkali metal targeted deep removal method, wherein quartz sand is mixed with silicon carbide abrasive and dry ground, and then is immersed into a solution containing ammonium fluoroborate, nano titanium dioxide and graphene quantum dots for etching; then a composite solution containing HEDP, EDTMPA, crown ether and beta-cyclodextrin is used to complex and leach alkali metals in a microwave field; then, through a photoelectric desorption reactor, the complex is decomposed under the cooperation of ultraviolet light and an electric field; then, a supergravity rotating bed is used for three-stage countercurrent washing; finally, a radio frequency plasma treatment is used to repair the crystal lattice and remove hydroxyl groups in a hydrogen atmosphere at high temperature; through multi-step cooperation, the alkali metals are deeply removed. Through surface modification, composite complexing, photoelectric desorption and other technologies, the total alkali metal content of the quartz sand is reduced, energy consumption is reduced, waste liquid is reduced, the purity and performance of the material are improved, and the application is suitable for high-end fields such as semiconductors.

The invention provides a large-interlayer-spacing two-dimensional COFs material as well as a preparation method and application thereof, and relates to the technical field of thorium ion adsorption materials. The material is prepared by reacting an amino monomer with an aldehyde group monomer containing crown ether. By embedding crown ether into a COFs skeleton, the challenge that flexible crown ether molecules may cause reduction of material crystallinity is effectively overcome, a two-dimensional network structure which is stable in structure and highly accessible in adsorption sites is formed, a relatively large interlayer spacing is presented, a good diffusion channel is provided for guest molecules, and the stability of the material is improved. And the hydration thorium ions enter interlayers to generate chemical chelation coordination with crown ether units in the lamellas. More importantly, based on the dual coordination effect of the crown ether unit and the imine bond on thorium ions, the material shows excellent adsorption capacity and selective recognition capability on thorium, can realize separation, enrichment and recovery of thorium ions in a complex system, and has wide application prospects in the fields of wastewater treatment, resource recovery and the like.

The application belongs to the technical field of ion detection, and particularly relates to a furan fused derivative material and application thereof in barium ion detection. In order to solve the problems of the prior art, such as complicated and complex detection, high cost, poor detection sensitivity, and unsuitability for real-time analysis, etc. in the detection of barium ions, the application provides a furan fused derivative material. The furan fused derivative material is used as an active layer of an OECT, a designed and synthesized azacrown-6 crown ether material is modified above the active layer, selectivity is provided by the azacrown ether, a full-plane barium ion sensor is prepared, and the purpose of real-time detection of barium ion concentration with rapidity, accuracy and high sensitivity can be achieved. The detection limit is as low as 10nM, which is superior to most of the currently reported barium ion sensors, and greatly meets the detection requirements of environmental water samples.

The application discloses a volume fracturing intelligent construction fracture network thickening agent and a preparation method thereof, relates to the technical field of high-temperature oil and gas well fracturing fluid thickening agents, and the preparation method comprises the following steps: 1) synthesis of a biomimetic polymer skeleton; 2) grafting of a molecular shock absorber structure; and 3) modification of an intelligent switch group. The product is an intelligent biomimetic fracture network thickening agent, and through the synergistic effect of a biomimetic polymer skeleton, a dynamic disulfide bond molecular shock absorber and a crown ether intelligent switch group, specific response to potassium ions is realized. In K + The product can be quickly converted from a fluid state into an elastic gel state under triggering, and the sand carrying performance is significantly improved; the product has excellent high-temperature resistance and self-repairing capacity, and can be used for 10,000 s ‑1 The viscosity recovery rate after high-speed shearing is more than 78%, and the viscosity retention rate is kept high in long-term shearing. Meanwhile, the product has excellent gel breaking performance, and provides an intelligent controllable, efficient and stable fracture network construction solution for volume fracturing.

The invention relates to the technical field of wastewater treatment, in particular to a COF-based crown ether modified cellulose three-dimensional composite adsorption material. Single TpPa-SO3H powder has weak adsorbability on Cs < + > in wastewater and is difficult to form. In order to solve the problems, the invention provides the COF-based crown ether modified cellulose three-dimensional composite adsorption material which is prepared by the following steps: firstly, adding CMC and a cross-linking agent into a TpPa-SO3H aqueous solution to form hydrogel, and freeze-drying to obtain TpPa-SO3H / CMC; and adding the CMC into a crown ether solution, stirring and soaking, washing and drying to obtain the Crown-TpPa-SO3H / CMC. The material takes TpPa-SO3H, CMC and 18-crown ether-6 as raw materials, the three components synergistically construct a'multi-stage adsorption 'mechanism, a sulfonic group of TpPa-SO3H preferentially captures Sr < 2 + >, 18-crown ether-6 is specifically complexed with Cs < + > and a CMC network to promote ion transmission, radioactive metal ions such as cesium or strontium in wastewater can be efficiently separated, and the material has efficient adsorption performance and practical applicability.

A reinforced composite membrane with improved mechanical and chemical durability is provided. The reinforced composite membrane according to the present invention is a reinforced composite membrane in which an ion conductor dispersion is impregnated into a porous support comprising a polymer compound containing a first hydrophilic functional group, wherein the ion conductor dispersion comprises a first ion conductor containing a second hydrophilic functional group as a side chain and a crown ether-based compound containing a third hydrophilic functional group as a side chain.