Alkaline functionalized porous polyion liquid material as well as preparation method and application thereof

A technology of polyionic liquid and ionic liquid, which is applied in the field of alkaline functionalized porous polyionic liquid material and its preparation, can solve the problems of low adsorption capacity, poor mass transfer effect of non-porous materials and limit the application, so as to improve the adsorption capacity, The effect of excellent thermal stability and high efficiency separation selectivity

Active Publication Date: 2022-06-03
ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of this material for sulfur dioxide under extremely low partial pressure (below 2000ppm) is still low, and the poor mass transfer effect of non-porous materials limits the application of such materials.

Method used

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  • Alkaline functionalized porous polyion liquid material as well as preparation method and application thereof
  • Alkaline functionalized porous polyion liquid material as well as preparation method and application thereof
  • Alkaline functionalized porous polyion liquid material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Weigh 1.0 g of 2-amino-3,5-dibromopyridine, 1.32 g of potassium vinyl trifluoroborate, 1.6 g of potassium carbonate, and 0.116 g of triphenylphosphonium palladium, and add them to a mixture of 25 ml of toluene, 25 ml of tetrahydrofuran and 25 ml of water. The mixture was mixed and dissolved, and then heated to 90° C. under a nitrogen atmosphere to react for 48 hours. The obtained product was extracted with ethyl acetate, washed with brine, and then dried over anhydrous sodium sulfate. Crude product was obtained after distillation under reduced pressure. The crude product was then purified by flash chromatography using n-hexane / ethyl acetate (1:1) and 3% v / v triethylamine as eluent to give a pale yellow powdery solid, the basic functionalized crosslinker The molecular structure of 2-amino-3,5-divinylpyridine is shown in formula (I), and the yield is about 70%.

[0055]

[0056] Weigh 1.0 g of 4-amino-3,5-dibromopyridine, 1.32 g of potassium vinyl trifluoroborate, 1....

Embodiment 2

[0061] In a 50mL Schlenk storage bottle, weigh 1.00g of the basic functionalized crosslinking agent 2-amino-3,5-divinylpyridine obtained in Example 1, 0.087g of 1-vinyl-3-ethylimidazolium bromide (mol ratio 16:1) and 0.022g azobisisobutyronitrile, dissolved in 14mL mixed solution of ethyl acetate, ethanol and water (volume ratio 8:4:2), mixed and dissolved under stirring, and then heated to 80°C React for 24 hours. After cooling at room temperature, the obtained product was filtered, washed with water and ethyl acetate, and then vacuum-dried at 100° C. for 24 hours to obtain a yellow solid powder with a yield of about 75%.

Embodiment 3

[0063] In a 50mL Schlenk storage bottle, weigh 1.00g of the basic functionalized crosslinking agent 4-amino-3,5-divinylpyridine obtained in Example 1, 0.087g of 1-vinyl-3-ethylimidazolium bromide (mol ratio 16:1) and 0.022g azobisisobutyronitrile, dissolved in 14mL mixed solution of ethyl acetate, ethanol and water (volume ratio 8:4:2), mixed and dissolved under stirring, and then heated to 80°C The reaction was carried out for 8 hours. After cooling at room temperature, the obtained product was filtered, washed with water and ethyl acetate, and then vacuum-dried at 80° C. for 24 hours to obtain a yellow solid powder with a yield of about 76%.

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Abstract

The invention discloses an alkaline functionalized porous polyion liquid material, a preparation method thereof and application of the alkaline functionalized porous polyion liquid material in selective adsorption and separation of sulfur dioxide. The alkaline functionalized porous polyionic liquid material has the characteristics of rich alkaline functionalized sites, high ionic liquid content and developed pore structure. Through strong interaction between alkaline sites and sulfur dioxide guest molecules, deep removal of sulfur dioxide in mixed gas is realized. The material is high in stability, simple to prepare, good in adsorption performance, capable of being recycled, environmentally friendly and good in industrial application prospect.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, and specifically to a type of alkaline functionalized porous polyionic liquid material and its preparation method and application. Background technique [0002] Polymer materials are porous materials based on covalent bonding. These materials are mainly composed of carbon, nitrogen, oxygen and other atoms linked through covalent bonds. They usually have the advantages of low density and good stability. They can also be made by introducing specific Functional groups modify materials, allowing them to be flexibly used in various fields. Currently, commonly used methods for synthesizing polymer materials include preparing macroporous adsorption resins (CN113698524A, CN101910268A) through emulsion polymerization, preparing hypercrosslinked polymers (CN113529205A) from rigid aromatic monomers through Friedel-Crafts alkylation, and condensation. Reaction to prepare covalent organic framework...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F226/06B01J20/26B01J20/28B01J20/30B01D53/02B01D53/50B01D53/81
CPCC08F226/06B01J20/262B01J20/28011B01J20/28054B01D53/02B01D53/508Y02C20/40
Inventor 崔希利黄诗承陈森邢华斌
Owner ZHEJIANG UNIV HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
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