A kind of 1,2,3-triazole salt polymer and its preparation method and application

A technology of triazole salts and polymers, which is applied in the field of polymers and preparation of 1,2,3-triazole salts, can solve the problems of poor alkaline stability, low anion conductivity, unusability, etc. High stability, wide source of raw materials and mild reaction conditions

Active Publication Date: 2018-05-15
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, an anion exchange membrane with satisfactory performance for alkaline fuel cell applications has not been developed so far, mainly due to the poor alkaline stability and low anion conductivity of anion exchange membranes based on organic cations
In alkaline medium and higher temperature (higher than 60°C), organic cationic functional groups (such as quaternary ammonium salts) are easily attacked by hydroxide ions and undergo degradation reactions (such as S N 2 nucleophilic substitution, Hoffman degradation reaction, etc.), which leads to a sharp decrease in the ion conductivity of the anion exchange membrane during actual use; at the same time, the main chain of the polymer is also vulnerable to the attack of hydroxide ions under alkaline conditions. Chain scission, causing the membrane to lose its mechanical properties and become unusable
In addition, due to the low ion mobility of hydroxide ions, the ion conductivity of anion exchange membranes is generally low (less than 10mS / cm at room temperature), which cannot meet the requirements of fuel cells.

Method used

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  • A kind of 1,2,3-triazole salt polymer and its preparation method and application
  • A kind of 1,2,3-triazole salt polymer and its preparation method and application
  • A kind of 1,2,3-triazole salt polymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Dissolve 2.136g of brominated polyphenylene ether (the degree of bromination is 27%) in 20mL of N-methylpyrrolidone, stir magnetically to form a homogeneous solution, add 1.325g of sodium azide, and react at 60°C for 12 hours. Precipitate in methanol / water (v / v=5 / 1) mixed solution, wash 4 times, filter and dry to obtain methyl azidated polyphenylene ether.

[0039] Add 1.000g of the prepared methyl azide polyphenylene ether, 0.34mL of 1‐hexyne, 0.1076g of cuprous bromide, and 0.313mL of N,N,N',N,'N into a 25mL Schlenk reactor. ‐pentamethyldiethylenetriamine and 7mL N‐methylpyrrolidone, and the reactor was sealed, and immersed in liquid nitrogen, after 3 times of vacuum ‐ nitrogen ‐thawing, the oxygen in the reactor was excluded. After the reactor was placed in an oil bath at 60°C for 6 hours, the solution was precipitated in a large amount of methanol, washed, filtered, and dried to obtain 1,2,3‐triazole polyphenylene ether.

[0040] Dissolve 0.857g of the prepared 1,2...

Embodiment 2

[0044] Dissolve 2.000g of chloromethylated polyethersulfone (chloromethylation content: 16%) in 20mL of N,N-dimethylformamide, stir magnetically to form a homogeneous solution, then add 0.231g of sodium azide , after reacting at 80°C for 8 hours, precipitate in methanol / water (v / v=1 / 1) mixed solution, wash 5 times, filter and dry to obtain methyl azide polyethersulfone.

[0045]Add 1.000g of prepared methyl azide polyethersulfone, 0.046mL of phenylacetylene, 0.0152g of cuprous bromide, 0.044mL of N,N,N',N,'N"- Pentamethyldiethylenetriamine and 7mL N,N-dimethylformamide, and the reactor was sealed and immersed in liquid nitrogen. After 3 times of vacuum-nitrogen-thawing, the oxygen in the reactor was Exclusion. After putting the reactor into an oil bath at 60°C for 8 hours, the solution was precipitated in a large amount of methanol, washed, filtered and dried to obtain 1,2,3-triazole polyethersulfone.

[0046] Dissolve 0.800g of the prepared 1,2,3-triazole polyethersulfone an...

Embodiment 3

[0050] Dissolve 4.000g of a copolymer of p-chloromethylstyrene and styrene (the molar content of p-chloromethylstyrene is 30%) in 20mL of N, N-dimethylacetamide, magnetically stirred to form a homogeneous solution, Add 3.286g of sodium azide, react at 70°C for 8 hours, precipitate in methanol / water (v / v=1 / 1) mixed solution, wash twice, filter and dry to obtain methyl azide polystyrene.

[0051] In a 25mL Schlenk reactor, add 2.00g of prepared methyl azide polystyrene, 0.516mL of 1‐hexyne, 0.162g of cuprous bromide, 0.472mL of N,N,N',N,'N "-pentamethyldiethylenetriamine and 7mL N,N-dimethylacetamide, and the reactor was sealed and immersed in liquid nitrogen. Oxygen was excluded. After putting the reactor into a 70°C oil bath for 6 hours, the solution was precipitated in a large amount of methanol, washed, filtered, and dried to obtain 1,2,3‐triazole polystyrene.

[0052] Dissolve 1.50 g of prepared 1,2,3-triazole polystyrene and 1.76 mL of 1-iodobutane in 8 mL of N,N-dimethy...

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Abstract

The structural formula of a 1,2,3-triazole salt polymer is as follows: the present invention has the advantages of easy to obtain raw materials, simple operation, mild conditions and high selectivity, and the anion exchange membrane obtained has higher alkaline stability and ion exchange membrane The advantage of conductivity.

Description

technical field [0001] The invention relates to anion exchange membranes, in particular to a polymer of 1,2,3-triazole salt, its preparation method and application. technical background [0002] Compared with proton exchange membranes, alkaline fuel cells based on anion exchange membranes have the advantages of low fuel permeability, the use of non-precious metal catalysts, and high electrode reaction rates, and have attracted much attention in recent years. Among them, anion exchange membrane, as a key component of alkaline fuel cells, plays a vital role in the performance of fuel cells. However, an anion-exchange membrane with satisfactory performance for alkaline fuel cell applications has not been developed so far, mainly because anion-exchange membranes based on organic cations have poor alkaline stability and low anion conductivity. In alkaline medium and higher temperature (higher than 60°C), organic cationic functional groups (such as quaternary ammonium salts) are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/48C08G75/23C08F8/30C08F212/08C08J5/22
Inventor 李南文刘磊和树庆张淑芳
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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