Poly(N- ethenyl-N'-alkyl- imidazole) ion liquid structural material and its preparation method

A technology for ionic liquids and structural materials, which is applied in the field of poly(N-vinyl-N'-alkyl-imidazole) ionic liquid structural materials and its preparation, and can solve problems that do not involve the molar fraction of structural segments containing ionic liquids , to achieve the effects of easy processing, wide electrochemical window and good mechanical properties

Inactive Publication Date: 2007-05-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although M. Watanabe et al.'s research (Electrochimica Acta, 40, 2285, 1995) has taken the synthetic route of using monomer polymerization first, and then introducing the ionic liqu

Method used

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  • Poly(N- ethenyl-N'-alkyl- imidazole) ion liquid structural material and its preparation method
  • Poly(N- ethenyl-N'-alkyl- imidazole) ion liquid structural material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 23.5 grams of vinylimidazole monomers (0.25 moles in total) were packed into a 150ml three-necked flask with a reflux condenser and a feeding tube, added benzene to make the solution 80ml, stirred, degassed, and filled with nitrogen for protection. After dissolving 0.1 g of azobisisobutyronitrile (AIBN) in 5 ml of benzene, place it in the feeding tube. The flask was heated to 60 °C, the AIBN solution was added into the flask from the feeding tube within one minute, and the polymerization reaction started. After 3 hours of polymerization reaction, the solvent was evaporated, and vacuum-dried in a vacuum oven at 80° C. for 24 hours to constant weight to obtain polyvinylimidazole. The weighing method is used for calculation and analysis, and the reaction conversion rate is 82.0% based on the addition of vinylimidazole monomer.

Embodiment 2

[0027] Put 4.7 grams (0.05 moles in terms of vinylimidazole monomer) of polyvinylimidazole into a three-necked flask with a reflux condenser, add 100 grams of absolute ethanol to dissolve it, and then add 8.2 grams (0.06 moles) of bromine Substitute n-butane (the molar ratio to vinylimidazole monomer is 1.2:1), heat up to ethanol reflux through a constant temperature bath under stirring, and the reaction continues for 24 hours, maintaining a weak nitrogen flow as a protection during the entire reaction process. gas. The ethanol solvent used in the reaction was evaporated, and the reaction product was vacuum-dried in a vacuum oven at 80°C for 24 hours to constant weight to obtain brominated n-butylpolyvinylimidazole, and the reaction combination rate was 85.0% based on vinylimidazole monomer .

Embodiment 3

[0029] Repeat Example 2, add 10.9 grams (0.1 mole) bromoethane (the molar ratio with vinylimidazole monomer is 2: 1) to replace brominated n-butane, and the reaction combination rate is calculated in terms of vinylimidazole monomer 89.3%.

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Abstract

The invention discloses a poly-N-vinyl-N'-alkyl-imidazole ionic liquid structure material, which possesses general structure on the right, wherein R is C2-C16 alkyl; X is negative ion; n and m is chain segment number with and without ionized group; the scale of the rate of n and n+m is 0.1:1-1:1, which is adjusted by the molar rate of reactant; the polymer molecular quantity scale is (0.1-100)*104g/mol.

Description

technical field [0001] The invention relates to poly(N-vinyl-N'-alkyl-imidazole) ionic liquid structural material and a preparation method thereof, which is a reaction product of polyvinylimidazole and halogenated hydrocarbon. Background technique [0002] As a new green chemical substance that is friendly to the environment, the research on ionic liquids has received extensive attention. Due to the advantages of good thermal stability, high ionic conductivity, wide electrochemical window, non-volatility, and non-combustibility, ionic liquids are used in secondary batteries, photovoltaic cells, electric double-layer capacitors, transistors, and metal electrodes. It has broad application prospects in deposition and membrane separation. However, as a liquid, ionic liquid has the disadvantage of being easy to flow, which brings inconvenience to the application in some occasions. Generally speaking, polymers have low electrical conductivity, but they have the advantages of bei...

Claims

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Application Information

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IPC IPC(8): C08F8/00C08F126/06
Inventor 吴有庭焦真张志炳李磊
Owner NANJING UNIV
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