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A method and application of preparing two-dimensional covalent organic framework ultrathin nanosheet material composite film

A covalent organic framework and nanosheet technology, applied in the field of membrane separation, can solve problems such as difficulty in forming uniform membrane materials, inability to obtain high-quality gas separation membranes, and no breakthrough in the research of gas separation membrane materials. Effective size, improved gas separation performance, increased mechanical strength and stability

Active Publication Date: 2022-04-08
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the two-dimensional covalent organic framework polymer precursor materials have limited high-quality two-dimensional covalent organic framework ultra-thin materials in terms of synthesis controllability and ease of layer opening due to various reasons such as large pores and structural rigidity. Preparation of nanosheet materials. At the same time, viscous polymers and light-weight two-dimensional covalent organic framework ultrathin nanosheet materials are difficult to form uniform film materials, so neither pure phase nor composite with polymers can obtain higher High-quality gas separation membranes, the research on related gas separation membrane materials has not made a breakthrough

Method used

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  • A method and application of preparing two-dimensional covalent organic framework ultrathin nanosheet material composite film
  • A method and application of preparing two-dimensional covalent organic framework ultrathin nanosheet material composite film
  • A method and application of preparing two-dimensional covalent organic framework ultrathin nanosheet material composite film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The preparation of embodiment 1 TpPa-1

[0061] Add 31 mg of 1,3,5-trialdehydephloroglucinol (Tp) and 24 mg of p-phenylenediamine (Pa-1) powder into a Pyrex tube. 1.5 ml of 1,4-dioxane and 1,3,5-trimethylbenzene were added as solvents respectively. Add 0.5 ml of 3 mol per liter of acetic acid as a catalyst. The mixture was homogenized after sonication for 10 min. Then put the Pyrex glass tube into the liquid nitrogen bath to freeze. After the liquid in the tube solidifies, turn on the vacuum oil pump to pump air, and then take the sample tube out of the liquid nitrogen bath and wait for the liquid to melt. This freezing-pumping- The melting cycle needs to be performed three times. The vacuum-tight sample tube was placed in an oil bath at 120°C and heated for 72 hours to obtain a dark red powder. The powder was washed with tetrahydrofuran, methanol and acetone, extracted and washed with ethanol and dichloromethane, and dried under vacuum at 120° C. for 12 hours to ob...

Embodiment 2

[0063] The preparation of embodiment 2 TpPa-2

[0064] Add 31 mg of 1,3,5-trialdehydephloroglucinol (Tp) and 30 mg of 2,5-dimethyl-1,4-phenylenediamine (Pa -2) Powder. 1.5 ml of 1,4-dioxane and 1,3,5-trimethylbenzene were added as solvents respectively. Add 0.5 ml of 3 mol per liter of acetic acid as a catalyst. The mixture was homogenized after sonication for 10 min. Then put the Pyrex glass tube into the liquid nitrogen bath to freeze. After the liquid in the tube solidifies, turn on the vacuum oil pump to pump air, and then take the sample tube out of the liquid nitrogen bath and wait for the liquid to melt. This freezing-pumping- The melting cycle needs to be performed three times. The vacuum-tight sample tube was placed in an oil bath at 120°C and heated for 72 hours to obtain a dark red powder. The powder was washed with tetrahydrofuran, methanol and acetone, extracted and washed with ethanol and dichloromethane, and dried under vacuum at 120° C. for 12 hours to obt...

Embodiment 3

[0066] Example 3 NO 2 - Preparation of TpPa

[0067] Add 31 mg of 1,3,5-trialdehyde phloroglucinol (Tp) and 34.5 mg of o-nitro-p-phenylenediamine (NO 2-Pa) powder. 1.5 ml of 1,4-dioxane and 1,3,5-trimethylbenzene were added as solvents respectively. Add 0.5 ml of 3 mol per liter of acetic acid as a catalyst. The mixture was homogenized after sonication for 10 min. Then put the Pyrex glass tube into the liquid nitrogen bath to freeze. After the liquid in the tube solidifies, turn on the vacuum oil pump to pump air, and then take the sample tube out of the liquid nitrogen bath and wait for the liquid to melt. This freezing-pumping- The melting cycle needs to be performed three times. The vacuum-tight sample tube was placed in an oil bath at 120°C and heated for 72 hours to obtain a dark red powder. The powder was washed with tetrahydrofuran, methanol and acetone, extracted and washed with ethanol and dichloromethane, and dried under vacuum at 120°C for 12 hours to obtain N...

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Abstract

A method and application for preparing a two-dimensional covalent organic framework ultrathin nanosheet material composite film. The method includes (1) preparation of two-dimensional covalent organic framework ultra-thin nanosheets: after mixing the two-dimensional layered covalent compound precursor with an organic solvent, wet ball milling; (2) adopting a hot drop method in the Preparation of two-dimensional covalent organic framework nanosheet pure phase film on the surface of porous material; (3) secondary preparation of two-dimensional covalent organic framework nanosheet and ionic liquid composite film by hot drop method; (4) drying the composite film. The gas separation performance of the two-dimensional covalent organic framework ultrathin nanosheet composite membrane prepared by the present invention is significantly improved compared with the two-dimensional covalent organic framework nanosheet pure phase membrane.

Description

technical field [0001] The invention belongs to the field of membrane separation, and relates to the preparation and application of a novel two-dimensional covalent organic framework ultrathin nano sheet material composite membrane. Background technique [0002] Exhaust CO from fossil fuel combustion 2 Excessive emissions will lead to global temperature rise and damage the ecosystem, which is one of the problems to be solved urgently in our country. The membrane separation method has the advantages of low energy consumption, environmental friendliness, simple operation, and high mechanical / thermal / chemical stability. 2 from mixed gas with N 2 、H 2 、CH 4 Separation from components such as hydrocarbons has great practical significance in the life and production processes of combustion tail gas treatment, fuel gas purification, oxygen-enriched combustion, natural gas transportation and tertiary oil recovery. [0003] for CO 2 Membrane materials for separation and capture ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01J20/26B01J20/28B01J20/30C08G12/06C08G12/08C01B3/50C01B32/50B01D53/22B01D53/02
CPCB01D69/12B01D67/0079B01D53/228B01D53/02B01J20/06B01J20/08B01J20/02B01J20/262B01J20/22B01J20/28033C08G12/08C08G12/06C01B3/503C01B32/50B01J2220/4812B01J2220/4806B01J2220/46Y02P20/54
Inventor 杨维慎王鹏远彭媛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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