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Room-temperature self-repairing ionic gel as well as preparation method and application thereof

An ion gel, self-healing technology, applied in separation methods, chemical instruments and methods, semi-permeable membrane separation, etc., can solve the problem that the thickness of self-healing ion gel cannot be reduced to 100 microns, poor mechanical strength, low permeability problems, to achieve the effect of restoring structural integrity and carbon dioxide separation capacity, improving service life, improving service life and reliability

Pending Publication Date: 2022-03-18
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the reported self-healing ionogels have poor mechanical strength (tensile stress < 1 MPa), which originates from the dynamic network inside the ionogels.
Poor mechanical strength (tensile stress 2 low permeability
In addition, the self-healing of many ionogels requires the help of external stimuli (light, heat, or water, etc.), which are difficult to apply in gas separation devices.

Method used

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  • Room-temperature self-repairing ionic gel as well as preparation method and application thereof
  • Room-temperature self-repairing ionic gel as well as preparation method and application thereof
  • Room-temperature self-repairing ionic gel as well as preparation method and application thereof

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preparation example Construction

[0036] The invention provides a preparation method of room temperature self-repairing ion gel, comprising the following steps:

[0037] Mix diamino-terminated oligomers, ionic liquids, trialdehyde-based cross-linking agents and organic solvents, perform the first Schiff reaction in an ice-water bath, and then perform the second Schiff reaction at room temperature under sealed conditions to obtain room temperature self-healing ions gel.

[0038] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.

[0039] The raw materials used in the present invention, diamino-terminated oligomers and ionic liquids are stored in a desiccator at 25°C and 10% RH, the trialdehyde-based cross-linking agent is stored in a low temperature environment (2°C), and the rest of the reagents are stored at room temperature in environment.

[0040] The invention mixes diamino-terminated oligome...

Embodiment 1

[0069] H 2 N-PPG-PEG-PPG-NH 2 (M n =500~1900, 0.15g) and ionic liquid [EMIm]TFSI (0.15g) were dissolved in 7.5mL organic solvent THF, using a magnetic stirrer, stirred at a constant speed of 500rpm for 1h, completely dissolved, and a mixed solution was obtained;

[0070] Weigh 8.11mg of BTC and dissolve in THF to prepare 20mg·mL -1 Uniform clear and transparent solution to obtain a crosslinking agent solution;

[0071] In an ice-water bath, drop the cross-linking agent solution into the mixed solution drop by drop, use a magnetic stirrer to stir and mix evenly at a stirring speed of 500 rpm, react the obtained reaction solution for 4 hours under the condition of an ice-water bath, and cast the obtained transparent product on glass In a watch glass, seal the reaction at room temperature (25°C, 20%RH) for 72h; after the reaction, dry the obtained product at room temperature (25°C, 20%RH) for 48h, then place it in a room temperature vacuum desiccator After drying for 48 hours...

Embodiment 2

[0073] H 2 N-PPG-PEG-PPG-NH 2 (M n =500~1900, 0.15g) and ionic liquid [EMIm]TFSI (0.225g) were dissolved in 7.5mL organic solvent THF, using a magnetic stirrer, stirred at a constant speed of 500rpm for 1h, completely dissolved, and a mixed solution was obtained;

[0074] Weigh 8.11mg of BTC and dissolve in THF to prepare 20mg·mL -1 Uniform clear and transparent solution to obtain a crosslinking agent solution;

[0075] In an ice-water bath, drop the cross-linking agent solution into the mixed solution drop by drop, use a magnetic stirrer to stir and mix evenly at a stirring speed of 500 rpm, react the obtained reaction solution for 4 hours under the condition of an ice-water bath, and cast the obtained transparent product on glass In a watch glass, seal the reaction at room temperature (25°C, 20%RH) for 72h; after the reaction, dry the obtained product at room temperature (25°C, 20%RH) for 48h, then place it in a room temperature vacuum desiccator After drying for 48 hour...

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Abstract

The invention provides room-temperature self-repairing ionic gel as well as a preparation method and application thereof, and belongs to the technical field of gas separation. A double-amino-terminated oligomer and a trialdehyde crosslinking agent are used as raw materials, based on a Schiff reaction of amino and aldehyde, the double-amino-terminated oligomer and the trialdehyde crosslinking agent can form a supramolecular polymer network (I-SPNs) crosslinked by dynamic imine bonds, and the crosslinked polymer network wraps an ionic liquid, so that the ionic liquid is dispersed in the supramolecular polymer network, and the ionic liquid is dispersed in the supramolecular polymer network. The cross-linked polymer network structure has high cross-linking density, so that the mechanical strength of the ionic gel is remarkably improved. The high bond energy of the dynamic imine bond and the polymer cross-linked network structure in the room-temperature self-repairing ionic gel endow the ionic gel with good stability, mechanical properties and repairing performance, so that the ionic gel can still keep efficient and stable gas permeability and separation performance after multiple times of physical shear mark damage.

Description

technical field [0001] The invention relates to the technical field of gas separation, in particular to a room temperature self-repairing ion gel and its preparation method and application. Background technique [0002] With the rapid development of society and industry, the increase of carbon dioxide in the atmosphere has gradually led to global climate change, threatening the survival of human beings. Therefore, CO is separated from the exhaust gas and the air 2 , and using it as a raw material for the production of chemicals and materials has become an important research area. Ionic liquids composed of organic cations and organic / inorganic anions are considered as next-generation "green solvents" with applications in catalysis, electrochemistry, spectroscopy, and materials science. Ionic liquids due to their low vapor pressure, good thermal stability and good CO 2 Solubility is considered a promising CO 2 Separation medium. Recent studies have shown that immobilizing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/06B01D71/06B01D53/02
CPCC08G12/06B01D71/06B01D53/025
Inventor 李洋付永昊孙俊奇
Owner JILIN UNIV
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