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2-methyl-3-alkyl imidazole onium salt polyarylether comb type polymer and preparation and application thereof

A technology of comb polymer and bromomethylated polyarylether, which is applied in the field of comb polymer and its preparation, can solve the problems of low ion conductivity and poor alkali resistance of quaternary ammonium groups

Active Publication Date: 2016-03-02
JILIN ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a 2-methyl-3-alkylimidazolium salt polyarylether comb polymer and its preparation and application to solve the problem of poor alkali resistance and low ion conductivity of quaternary ammonium groups commonly used in existing anion exchange membranes The problem

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  • 2-methyl-3-alkyl imidazole onium salt polyarylether comb type polymer and preparation and application thereof
  • 2-methyl-3-alkyl imidazole onium salt polyarylether comb type polymer and preparation and application thereof
  • 2-methyl-3-alkyl imidazole onium salt polyarylether comb type polymer and preparation and application thereof

Examples

Experimental program
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Embodiment 1

[0041] Embodiment 1: 2-methyl-3-hexyl imidazolium salt polyaryl ether sulfone comb polymer and preparation method thereof

[0042] (1) Preparation of bromomethylated polyaryl ether sulfone: Dissolve 15 g of tetramethylbiphenol type polyaryl ether sulfone in 200 mL of chloroform, add to 500 mL of N 2 In a protected three-necked flask, heat to 70°C under mechanical stirring. 11.75g ​​of N-bromosuccinimide and 1.6g of benzoyl peroxide were added to the reaction system twice. The reaction was continued for 24h, and discharged in acetone after cooling. The strips are pulverized with a high-speed pulverizer, and then the polymer is boiled and washed with distilled water, filtered, and repeated 6 times, and then dried in a vacuum oven to obtain the product.

[0043] The peak at 4.5ppm in the NMR spectrum corresponds to the hydrogen on the benzyl bromide carbon (Ar-CH 2 -Br), the peak at 2.2 ppm corresponds to hydrogens on residual methyl groups that did not participate in the brom...

Embodiment 2

[0048] Example 2: 2-methyl-3-decyl imidazolium salt polyarylethersulfone comb polymer and its preparation method

[0049] (1) Preparation of bromomethylated polyaryl ether sulfone: same as Example 1.

[0050] (2) Preparation of 1-decyl-2-methylimidazole: 2.46g of 2-methylimidazole, 5.97g of 1-bromodecane and 1.8g of sodium hydroxide were dissolved in 70mL of acetonitrile, heated and stirred at 60°C for 12h , continuous access to N 2 Protect. After the reaction was completed, it was cooled to room temperature, and the precipitate was filtered off. The acetonitrile solvent was removed with a rotary evaporator to obtain the crude product as an oil. The crude product was dissolved in 70mL of dichloromethane, washed four times with water, separated, dried with anhydrous magnesium sulfate for 48h, and obtained by filtration.

[0051] The obtained 1-decyl-2-methylimidazole is subjected to structure determination by nuclear magnetic resonance spectrum, and the result is obtained: ...

Embodiment 3

[0054] Embodiment 3: Preparation of dimethylimidazolium salt polyarylethersulfone polymer

[0055] Completely dissolve 3g of bromomethylated polyarylethersulfone with a bromination degree of 1.75 in 30mL of N-methylpyrrolidone, then add 1.01g of 1,2-dimethylimidazole into the reaction solution, N 2 Protected, mechanically stirred, and heated at 60°C for 12h. After cooling, the material was discharged in acetone, crushed, filtered, washed 5 times with water, and dried to obtain bromo-type dimethylimidazolium salt polyarylethersulfone polymer (ImPAES-C1).

[0056] figure 1 In the NMR spectrum shown, the peak at 0.8 ppm corresponds to the hydrogen on the N3 methyl group of the grafted imidazole ring, thus proving the successful introduction of the dimethylimidazolium group. By calculating the residual hydrogen in the benzyl bromine position in the nuclear magnetic spectrum, the calculated reaction conversion rate is also 74%. The glass transition temperature of ImPAES-C1 measu...

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Abstract

The invention relates to a 2-methyl-3-alkyl imidazole onium salt polyarylether comb type polymer and a preparation method thereof, and belongs to comb type polymers and a preparation method thereof and anion-exchange membranes prepared from the comb type polymer. Ion exchange perssad connected to the comb type polymer is C2 and N3 substituted imidazolium salt, and compared with traditional quaternary ammonium salt and unsubstituted imidazolium salt, better alkali-resisting stability is achieved. In addition, the imidazolium salt polyarylether comb type polymer connected with hydrophobic side chains of different lengths is provided with an obvious hydrophilic / hydrophobic phase separation structure, and high ionic conductivity is achieved. Then, the hydrophobic long alkyl side chains achieving space expansion can protect the periphery of the ion perssad, the alkali-resisting stability of an anion-exchange membrane is further enhanced, the water absorption rate is low, and swelling of the membrane can be restrained.

Description

technical field [0001] The present invention relates to a kind of comb polymer and its preparation method, and the application of the comb polymer in the technical field of anion exchange membrane, which relates to 2-methyl-3-alkylimidazolium salt polyarylether comb polymerization substances and their preparation methods and applications. Background technique [0002] High-performance membrane materials are one of the core materials to solve major problems in the fields of energy, resources and the environment, and have great application requirements in industries such as chlor-alkali, water treatment, fuel cells and energy storage batteries. Currently with Proton exchange membranes represented by membranes are the most widely used in these industries. Although they have good thermal, chemical and mechanical stability and high ionic conductivity, the use of noble metal catalysts such as platinum to catalyze electrochemical reactions greatly limits the popularization and a...

Claims

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Application Information

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IPC IPC(8): C08G65/48C08L71/12H01M8/1032H01M8/1025
CPCC08G65/48C08J5/18C08J2371/12C08L71/126C08L2203/16C08L2203/20H01M8/1025H01M8/1032H01M2008/1095Y02E60/50
Inventor 杨晓瑛赵成吉孙成勋张玉荣
Owner JILIN ELECTRIC POWER RES INST
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