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Preparation method of two-dimensional anion exchange polymer, prepared polymer and application thereof

An anion and polymer technology, which is applied in the field of preparation of two-dimensional anion exchange polymers, can solve the problems of lack of synthesis methods and inappropriate preparation of two-dimensional polymers, and achieve the effect of facilitating efficient conduction

Active Publication Date: 2021-07-16
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason for restricting the development of two-dimensional polymer anion exchange polymer membranes is the lack of effective synthetic methods, because the synthetic methods of one-dimensional and three-dimensional polymers are not suitable for the preparation of two-dimensional polymers.

Method used

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  • Preparation method of two-dimensional anion exchange polymer, prepared polymer and application thereof
  • Preparation method of two-dimensional anion exchange polymer, prepared polymer and application thereof
  • Preparation method of two-dimensional anion exchange polymer, prepared polymer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The preparation method of monomer A1 specifically comprises the following steps:

[0067] Synthesis of Intermediate I: In a 100mL single-necked flask, first ethanolamine (1.02g, 0.0167mol), triethylamine (Et 3 N, 3.38g, 0.0334mol) and acetonitrile (20mL) were stirred and miscible, and then 4-chloromethylstyrene solution was added dropwise, and the reaction was stirred at room temperature for 24 hours. After removing the white solid by filtration, the solution was extracted with ethyl acetate. The extract was dried with anhydrous sodium sulfate, and the solvent was removed by rotary evaporation to obtain a crude product. The crude product was recrystallized in a mixed solvent of petroleum ether and ethyl acetate (40:1) to obtain intermediate I, namely N,N-bis(4-vinyl-benzyl)-2-hydroxyethylamine, the yield 90%.

[0068] Synthesis of monomer A1: In a 50mL reaction flask, add intermediate I (1.1971g, 4.08mmol) and acetonitrile (20mL), heat up to 40°C and stir to dissolve...

Embodiment 2

[0072] The preparation method of monomer B1 specifically comprises the following steps:

[0073] Intermediate II synthesis: in 100mL single-necked flask, add diethanolamine (2.19g, 20.87mmol), potassium carbonate (2.88g, 20.87mmol) and acetonitrile (30mL), add dropwise 4-chloromethylstyrene ( 3.50 g, 22.95 mmol) solution, stirred and reacted at room temperature for 24 hours. After filtering off the white solid, the filtrate was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate and rotary evaporated to obtain a light yellow liquid as the crude product. The crude product was purified by silica gel chromatography (petroleum ether:ethyl acetate=20:1) to obtain intermediate II with a yield of 85%.

[0074] Synthesis of monomer B1: Add intermediate II (7g, 31.63mmol) and acetonitrile (20mL) into a three-necked flask, heat up to 40°C under stirring, then add methyl iodide (44.89g, 316.3mmol), and keep stirring at 40°C for 24 Hour. After the reactio...

Embodiment 3

[0078] Monomer self-assembly, such as figure 1 As shown, it specifically includes the following steps:

[0079] In a 25mL reaction bottle, first add monomer A1 (100mg, 229.7μmol) and monomer B1 (1.67g, 4.594mmol), then add N,N dimethylformamide (10mL), and dissolve the monomer by ultrasonic to form solution, add an appropriate amount of water, and then stand at room temperature for 24 hours to self-assemble and obtain two-dimensional supramolecular aggregates.

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Abstract

The invention discloses a preparation method of a two-dimensional anion exchange polymer and a membrane thereof, and relates to the technical field of polymer chemistry and fuel cell anion exchange membranes. The preparation method comprises the following steps: (1) designing and synthesizing a quaternary ammonium monomer suitable for two-dimensional self-assembly polymerization; (2) carrying out self-assembly on a quaternary ammonium salt monomer in an aqueous solution of a polar solvent to obtain a two-dimensional supramolecular aggregate solution; (3) adding a free radical initiator into the two-dimensional supramolecular aggregate solution, filling nitrogen to remove oxygen, and performing free radical polymerization reaction to obtain a two-dimensional polymer; and (4) carrying out solution casting on the two-dimensional polymer to obtain the two-dimensional anion exchange polymer membrane. The invention also provides the anion exchange polymer membrane prepared by the method. The preparation method has the beneficial effects that the surface of the formed two-dimensional polymer sheet layer contains a large number of quaternary ammonium hydrophilic groups, so that an ion channel is easy to form, and efficient conduction of anions in the membrane is facilitated.

Description

technical field [0001] The invention relates to the technical fields of polymer chemistry and fuel cell anion exchange membrane, in particular to a preparation method of a two-dimensional anion exchange polymer, the prepared polymer and its application. Background technique [0002] Since the breakthrough in the research of graphene, a single atomic layer graphite material, in 2004, two-dimensional materials have received more and more attention in academia and business circles. Two-dimensional materials refer to layered structure materials with a single atomic layer or several atomic thicknesses. Due to their outstanding physical and chemical properties, they have broad application prospects in many fields such as energy storage, catalysis, sensing, and biomedicine. [0003] For two-dimensional organic polymers, it is usually defined as a layered macromolecule with atomic or molecular thickness connected by covalent bonds in two dimensions. Research work in recent years ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/14C08F212/34C08L25/18C08L29/04C08J5/22H01M8/1044H01M8/1081
CPCC08F212/26C08J5/2243H01M8/1044H01M8/1081C08J2325/18C08J2429/04C08F212/34Y02P70/50
Inventor 白玮章秀丽
Owner ANHUI UNIVERSITY
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