Novel crosslinked alkaline polyarylether anion exchange membrane as well as preparation method and application thereof

An anion-exchange membrane and polyarylether technology, applied in the field of cross-linked polyarylether compounds, can solve the problems of poor alkaline stability and low conductivity

Active Publication Date: 2017-05-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Oh - Low electrical conductivity and poor alkaline stability are the main problems faced by anion exchange membranes in AAEMFCs at present.

Method used

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  • Novel crosslinked alkaline polyarylether anion exchange membrane as well as preparation method and application thereof
  • Novel crosslinked alkaline polyarylether anion exchange membrane as well as preparation method and application thereof
  • Novel crosslinked alkaline polyarylether anion exchange membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] (1), preparation of random polyarylether compound: 10mmol of tetramethylbisphenol A (formula 19), 1mmol of bisphenol A (formula 22), 11mmol of 4,4'-difluorodiphenyl sulfone (formula 28), add 22mmol of potassium carbonate, 30mL of toluene and 20mL of sulfolane, nitrogen protection, bring water at 140°C for 2h, then raise the temperature to 210°C for 3h, pour the reaction solution into a beaker containing 300mL of methanol and stir to precipitate, And using methanol and deionized water and repeated washing, vacuum drying at 80 ° C to obtain a gray polymer resin, and the structure of the prepared polyarylether compound was characterized by hydrogen nuclear magnetic resonance, as shown in figure 1 As shown, the molecular weight of the prepared random polyarylether compound measured by GPC is 68kg / mol, and the structure is as follows:

[0115]

[0116] (2) Bromomethylation: Take 0.01mmol of random polyarylether, dissolve it in 20mL of 1,1,2,2,-tetrachloroethane, add 0.035...

Embodiment 2

[0127] (1) Preparation of random polyarylether compounds: 3mmol tetramethylbiquinone (formula 20), 7mmol bisphenol AF (formula 23), 10mmol 4,4'-difluorodiphenyl sulfone (formula 28), Add 20mmol of sodium carbonate, 20mL of toluene and 20mL of N,N-dimethylacetamide, nitrogen protection, bring water at 140°C for 2.5h, then raise the temperature to 165°C for 12h, pour the reaction solution into a container containing 300mL of methanol Stir and precipitate in a beaker, wash with methanol and deionized water repeatedly, and dry under vacuum at 80°C to obtain a gray polymer resin. The molecular weight of the prepared random polyarylether compound is 62kg / mol, and the nuclear magnetic resonance hydrogen Spectra characterized the structure of the prepared polyarylether compound, the structure is as follows:

[0128]

[0129] In the formula, Ar 1 For formula (20), Ar 3 is formula (10)

[0130] (2) Bromomethylation: Take 0.01mmol (0.62g) of random polyarylether, dissolve it in 20m...

Embodiment 3

[0140] (1) Preparation of random polyarylether compounds: 2mmol tetramethylbisphenol fluorene (formula 21), 8mmol p-hydroxycatechol (formula 24), 4,4'-difluorodiphenyl sulfone (10mmol), Add 20mmol of cesium carbonate, 10mL of toluene and 20mL of N,N-dimethylformamide, under nitrogen protection, bring water at 140°C for 3h, then raise the temperature to 150°C for 16h, pour the reaction solution into a tank containing 300mL of methanol Stir and precipitate in a beaker, wash with methanol and deionized water repeatedly, and dry under vacuum at 80°C to obtain a gray polymer resin. The molecular weight of the prepared random polyarylether compound is 52kg / mol, and the H NMR spectrum The structure of the prepared polyarylether compound was characterized, and the structure is as follows:

[0141]

[0142] In the formula, Ar 1 For formula (32), Ar 3 is formula (11)

[0143] (3) Bromomethylation: Take 0.01mmol (0.52g) of random polyarylether, dissolve it in 20mL of 1,1,2,2,-tetra...

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Abstract

The invention discloses a novel crosslinked alkaline polyarylether anion exchange membrane, as well as a preparation method and application of the novel crosslinked alkaline polyarylether anion exchange membrane. The membrane is provided with a structure as shown in the formula (I); when the membrane is prepared, firstly, a polyarylether compound is dissolved in a polar solvent, and bromomethylated or chloromethylated under the protection of nitrogen, vacuum drying is performed after washing to obtain a bromomethylated or chloromethylated polyarylether compound, later the bromomethylated or chloromethylated polyarylether compound is dissolved in the polar solvent, a cross-linking reagent is added and reacted for 0.5 to 3h, and then a quaternization reagent is added to be reacted for 20 to 24h, thus the novel crosslinked alkaline polyarylether anion exchange membrane is prepared through coating and alkalization processes. The novel crosslinked alkaline polyarylether anion exchange membrane disclosed by the invention is formed by preparing polyaromatic ether sulfone containing quaternary ammonium ion exchange groups or a polyaryletherketone polymer, thereby having relatively high ionic conductivity and good thermal stability and alkaline stability, being capable of meeting operating requirements of an alkaline fuel cell anion exchange membrane and having relatively good application prospects.

Description

technical field [0001] The invention belongs to the field of ion-exchange membrane materials, and in particular relates to a cross-linked polyarylether compound, an anion-exchange membrane thereof, a preparation method and application thereof. Background technique [0002] A fuel cell is a power generation device that can directly convert the chemical energy stored in fuel and oxidant into electrical energy, and its emission products are only carbon dioxide and water, which is relatively clean and environmentally friendly. Therefore, fuel cells are considered to be one of the most promising energy conversion devices in the 21st century. Proton exchange membrane fuel cells (PEMFCs), as a kind of fuel cells, have the advantages of long life, environmental friendliness, rapid start-up, high specific power and specific energy, and simple structure. Since proton exchange membrane fuel cells need to use expensive perfluorosulfonic acid polymers (Nafion series membranes, DuPont, U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/38C08G65/48C08J5/22H01M8/10
CPCC08G65/38C08G65/48C08J5/2256C08J5/2287C08J2371/12H01M8/1088Y02E60/50
Inventor 温乐乐陆地薛立新
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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