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KR-102962348-B1 - Anion exchange polymer material, anion exchange membrane including the same and manufacturing method thereof

KR102962348B1KR 102962348 B1KR102962348 B1KR 102962348B1KR-102962348-B1

Abstract

An anion exchange polymer material is disclosed, comprising: a first polymer having repeating units represented by the following chemical formula 1; and a second polymer derived from a vinyl group-containing photocrosslinkable monomer represented by the following chemical formula 2: [Chemical Formula 1] [Chemical Formula 2] In chemical formulas 1 and 2, n, n1, n2, Ar, L 1 , L 2 , L 3 , a1, R 1 , R 2 , R 3 , R 4 , R 5 , X - , Y - , Z - refer to the present specification.

Inventors

  • 이혜지
  • 진상우

Assignees

  • 도레이첨단소재 주식회사

Dates

Publication Date
20260507
Application Date
20241025

Claims (15)

  1. A first polymer having repeating units represented by the following chemical formula 1; and Anion exchange polymer material comprising a second polymer derived from a vinyl group-containing photocrosslinkable monomer represented by the following chemical formula 2: [Chemical Formula 1] [Chemical Formula 2] In chemical formulas 1 and 2, n, n1, and n2 are each integers greater than or equal to 1, and R2 , R3 , R5 , and R6 are independently selected from substituted or unsubstituted C1 - C20 alkyl groups, substituted or unsubstituted C2 - C20 alkenyl groups and -( CH2 ) n -N( Q1 )( Q2 ), wherein Q1 and Q2 are each hydrogen or a substituted or unsubstituted C1 - C3 alkyl group, and R2 and R3 , R2 and R5 , R2 and R6 , R3 and R5 , R3 and R6 , and R5 and R6 are each optionally combined with each other, and Ar is a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group, or a substituted or unsubstituted terphenylene group, and L1 , L2 , L3 are selected from single bonds and substituted or unsubstituted C1-C20 alkylene groups, and a1 is 0 or 1, and if a1 is 0 (L 1 ) a1 does not exist and i) at least one of R 2 and R 3 and ii) R 5 and R 6 combine with each other, and R1 and R4 are vinyl groups, respectively, and X- , Y- , and Z- are each halogen anions.
  2. In paragraph 1, An anion exchange polymer material in which Ar in Chemical Formula 1 above is an unsubstituted phenylene group, an unsubstituted biphenylene group, or an unsubstituted terphenylene group.
  3. In paragraph 1, In the above chemical formula 2 Anion exchange polymer material comprising a moiety of one of the following chemical formulas 2-1 to 2-4: [Chemical Formula 2-1] [Chemical Formula 2-2] [Chemical Formula 2-3] , , , [Chemical Formula 2-4] Each of the above * and *' is a bonding site with an adjacent atom.
  4. In paragraph 1, Anion exchange polymer material in which the above monomer comprises one or more of the following compounds 1 to 10: , , , , , , , , , .
  5. In paragraph 1, An anion exchange polymer material having a weight ratio of the first polymer to the second polymer of 1:0.2 to 1:0.7.
  6. An electrolyte comprising an anion exchange polymer material according to any one of claims 1 to 5; and The above electrolyte is an anion exchange membrane located on at least one part of the surface of the porous polymer support and the interior of the pores.
  7. In paragraph 6, The above electrolyte is an anion exchange membrane having a semi-interpenetrating polymer network (semi-IPN) structure in which a second polymer is intertwined with a first polymer backbone.
  8. In paragraph 6, The above anion exchange membrane is a free-standing film.
  9. In paragraph 6, The above anion exchange membrane has a sheet resistance of 0.20 Ω· cm² or less, and An anion exchange membrane having an ion conductivity of 35 mS/cm or higher at room temperature.
  10. In paragraph 6, An anion exchange membrane having an ion exchange capacity of 2.0 meq/g or more.
  11. In paragraph 6, The above anion exchange membrane is an anion exchange membrane having a current density of 800 mA or more when a voltage of 1.8 V is applied at room temperature.
  12. In paragraph 6, The above anion exchange membrane is an anion exchange membrane having a gas permeability of 7 x 10⁻¹⁵ mol/m²·s·Pa or less at room temperature and a pressure of 10⁶ Pa.
  13. A step of preparing a composition comprising an anion exchange polymer material according to claim 1; A step of applying the above composition to a substrate, drying it, and irradiating it with ultraviolet rays to form a film; and A method for manufacturing an anion exchange membrane, comprising the step of separating the above membrane from a substrate to manufacture an anion exchange membrane.
  14. In Paragraph 13, The step of forming a film by irradiating the above ultraviolet light is an anion exchange membrane having a light intensity of 2,000 mJ/ cm² to 10,000 mJ/ cm² at the time of irradiation.
  15. In Paragraph 13, An anion exchange membrane having a thickness of 30 μm to 100 μm.

Description

Anion exchange polymer material, anion exchange membrane including the same, and manufacturing method thereof The present disclosure relates to an anion exchange polymer material, an anion exchange membrane containing the same, and a method for manufacturing. An ion exchange membrane is a synthetic resin membrane that selectively allows only one type of ion to pass through, either cations or anions. Cation exchange membranes have negatively charged functional groups, allowing them to selectively pass through cations, while anion exchange membranes have positively charged functional groups, allowing them to selectively pass through anions. Ion exchange membranes are widely used in various fields based on electrodialysis technology, such as seawater concentration, desalination, purification of organic acids, and recovery of valuable metals. Furthermore, they are being applied to hydrogen production technology via water electrolysis, which has recently garnered attention for securing sustainable energy alongside the issue of CO2 reduction caused by global warming. Water electrolysis technologies utilizing ion exchange membranes include cation exchange membrane or proton exchange membrane electrolysis technologies utilizing proton transport, and anion exchange membrane electrolysis technologies utilizing anion exchange membranes in an alkaline solution environment. Anion exchange membrane electrolysis technology utilizes water electrolysis through the conduction of hydroxide ions; compared to proton exchange membrane electrolysis technology utilizing hydrogen ion conduction, it has the advantage of allowing the use of low-cost water splitting catalysts, leading to extensive research being conducted recently. These anion exchange membranes can be applied to water treatment systems such as electrodialysis, bipolar membrane electrodialysis, capacitive desalination, and electro-deionization, or to systems such as fuel cells, water electrolysis, reverse electrodialysis, and redox flow cells. Perfluorinated anion exchange membranes can be used as anion exchange membranes, but due to their high cost, hydrocarbon anion exchange membranes are applied in actual systems. However, hydrocarbon anion exchange membranes have limitations in improving membrane properties such as high ion exchange capacity (IEC), high current density, and low leakage because a certain fraction of porous support material exists within the membrane. Figure 1 is a schematic diagram of an electrolyte in an anion exchange membrane according to one embodiment. Hereinafter, an anion exchange polymer material according to one embodiment, an anion exchange membrane including the same, and a method for manufacturing the same will be described in more detail. The following is presented as an example and is not intended to limit the present invention, and the present invention is defined only by the claims set forth below. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. In the event of a conflict, the present specification, including definitions, shall prevail. Methods and materials similar or equivalent to those described herein may be used in the practice or testing of the present invention, but suitable methods and materials are described herein. In this specification, expressions such as "at least one type," "one or more types," or "one or more" preceding the components are capable of supplementing the list of all components and do not mean that they are capable of supplementing the individual components described above. In this specification, the term “includes” is used to indicate that other components may be added or/and interposed, rather than excluding other components, unless specifically stated otherwise. Unless otherwise specifically defined in this specification, the unit "parts by weight" means the weight ratio between each component. The numerical values described in this specification include the meaning of "approximately" even if not explicitly stated, and may be understood as being within the range of "numerical value ± 10%" unless otherwise noted. In this specification, the term "semi-interpenetrating polymer network (semi-IPN) structure" refers to a structure in which only one of two polymer components is selectively crosslinked without affecting the other component. In this specification, "a to b carbons" or "C a - C b ", a and b refer to the number of carbons of a specific functional group. That is, the functional group may include carbon atoms from a to b. For example, "alkyl group having 1 to 2 carbons" or "C 1 - C 2 alkyl group" refers to an alkyl group having 1 to 2 carbons, namely -CH 3 and -CH 2 CH 3 . In this specification, the term “alkyl” means a branched (broken) or unbranched (straight-chain) aliphatic hydrocarbon. The alkyl group includes, but is not limited to, methyl, ethyl, n-propyl,