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A temperature-responsive covalent organic framework material functionalized with temperature-controlled ionic liquids and its preparation method

A technology of covalent organic framework and ionic liquid, which is applied in the field of heat-sensitive materials and covalent organic framework materials, can solve problems such as polymer incompatibility, and achieve the effects of simple preparation process, less environmental pollution and low cost

Active Publication Date: 2022-05-27
XINXIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more commonly used method is generally based on polypropylene, and one or two layers of temperature-sensitive materials are coated on the surface of the polypropylene material. The preparation of temperature-sensitive materials by this method not only requires the addition of many other additives, but also exists Problems with polymer incompatibility

Method used

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  • A temperature-responsive covalent organic framework material functionalized with temperature-controlled ionic liquids and its preparation method
  • A temperature-responsive covalent organic framework material functionalized with temperature-controlled ionic liquids and its preparation method
  • A temperature-responsive covalent organic framework material functionalized with temperature-controlled ionic liquids and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The covalent organic framework material COF-1 was synthesized by a solvothermal method, including the following steps:

[0036]45mg 2-hydroxyterephthalaldehyde and 159mg 4,4',4"-(1,3,5-triazine-2,4,6-triyl)triphenylamine were added to a 10mL pressure-resistant glass tube, and then A mixed solution of 1,4-dioxane / mesitylene / 6M acetic acid (1.5mL / 1.5mL / 0.5mL) was added, and the mixed system was sonicated for 20 minutes. After three freeze-vacuum-thaw cycles, The pressure-resistant glass tube was sealed, and then the solid obtained by reacting at 120 °C for 72 hours was washed with dimethylacetamide, water and ethanol, respectively, and the obtained solid was vacuum-dried at 80 °C for 24 hours to obtain a yellow covalent organic framework material COF -1.

Embodiment 2

[0038] The synthesis of covalent organic framework material COF-2 includes the following steps:

[0039] Disperse 44mg covalent organic framework material COF-1 in 10mL DMF, and then add 21mg catalyst anhydrous K 2 CO 3 , ultrasonicated for 20min, then added 184mg of dibromopolyethylene glycol 800, stirred at room temperature for 2 hours, refluxed at 80°C for 3 hours, the solid was washed with ethanol, and then vacuum-dried at 80°C overnight to obtain a yellow covalent organic Frame material COF-2.

Embodiment 3

[0041] The synthesis of covalent organic framework material COF-3 includes the following steps:

[0042] Disperse 26 mg of covalent organic framework material COF-2 into 10 mL of acetonitrile, then add 4 mg of methylimidazole, and react under reflux at 80 °C for 48 hours. After the mixture is cooled to room temperature, suction filtration, wash with ethanol, and vacuum dry at 80 °C for 12 hours. A yellow covalent organic framework material COF-3 was obtained within hours.

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Abstract

The invention discloses a temperature-controlled ionic liquid functionalized temperature-responsive covalent organic framework material and a preparation method thereof, belonging to the technical field of heat-sensitive materials and covalent organic framework materials. The gist of the technical solution of the present invention is: a temperature-responsive covalent organic framework material functionalized with temperature-controlled ionic liquids, the chemical structure of which is as follows: wherein, n=8, 12, 16 or 22. The invention also specifically discloses a preparation method of the temperature-controlled ionic liquid functionalized temperature-responsive covalent organic framework material. The invention has the advantages of simple synthesis process, good crystal form, large specific surface area, good stability, and easy operation, etc., and the temperature-responsive covalent organic framework material COF‑XXU, which is functionalized with a temperature-controlled ionic liquid, has better temperature control characteristics, It is a heat-sensitive material with more practical application potential, which can be applied in fields such as energy storage, temperature-controlled molecular switches, and smart electrode materials.

Description

technical field [0001] The invention belongs to the technical field of thermosensitive materials and covalent organic framework materials, is mainly applied to the field of intelligent temperature-controlled molecular switches, and particularly relates to a temperature-responsive covalent organic framework material functionalized with temperature-controlled ionic liquids and a preparation method thereof. Background technique [0002] Covalent organic frameworks (COFs) are an emerging porous ordered crystal material with high crystallinity, designable structure, large specific surface area, low density, high thermal stability and chemical stability. In recent years, it has developed rapidly and is a research hotspot in the field of polymer science. It has broad application prospects in the fields of electrical conduction, molecular capture and release, gas separation, catalysis, and energy storage and conversion. [0003] In recent years, environment-responsive polymers have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/42C08G12/30
CPCC08G12/425C08G12/30
Inventor 姚文惠陈永魁
Owner XINXIANG UNIV
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