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Method for in-situ generation of polyimide covalent organic framework material on surface of carbon material

A technology of covalent organic framework and polyimide, which is applied in the field of preparation of covalent organic framework materials, can solve the problems of poor electrical conductivity and limited development, and achieve low raw material cost, simple synthesis method, easy preparation and industrial batch The effect of production

Inactive Publication Date: 2019-11-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Polyimide-type covalent organic frameworks are a class of materials with excellent thermal and chemical stability, and because of their surface-exposed carbonyl functional groups, they have been extensively studied in the fields of electrochemistry and other fields due to their redox properties. value; however, since the covalent organic framework is composed of light elements with poor electrical conductivity, its development is limited, but composite materials combined with carbon materials can just solve such problems

Method used

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  • Method for in-situ generation of polyimide covalent organic framework material on surface of carbon material
  • Method for in-situ generation of polyimide covalent organic framework material on surface of carbon material
  • Method for in-situ generation of polyimide covalent organic framework material on surface of carbon material

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Embodiment 1

[0031] A method for in-situ generation of a polyimide-type covalent organic framework material on the surface of a carbon material, the steps of which are as follows:

[0032] 1) Weigh 65.4mg pyromellitic anhydride, 58.0mg1,3,5-tris(4-aminophenyl)amine, 50mgC 60 , mixed uniformly by pre-grinding, added to a glass sealed tube, added isoquinoline with a mass concentration of 1‰ and 0.5mL of a mixed solvent of mesitylene and N-methylpyrrolidone with a volume ratio of 1:1, and mixed uniformly by ultrasonication. Vacuumize the reaction system under liquid nitrogen freezing conditions, repeat 3 times, ablate the glass sealing tube with an alcohol blowtorch to seal it, raise the temperature of the reaction system to 200°C, react for 72 hours, and obtain the crude product of the composite material after cooling.

[0033] 2) The crude product of the composite material synthesized above was fully washed in a tetrahydrofuran solvent to remove unreacted monomers, then heated and dried und...

Embodiment 2

[0036] A method for in-situ generation of a polyimide-type covalent organic framework material on the surface of a carbon material, the steps of which are as follows:

[0037] 1) Weigh 65.4 mg of pyromellitic anhydride, 58.0 mg of 1,3,5-tris(4-aminophenyl)amine, and 50 mg of multi-walled carbon nanotubes, mix them uniformly by pre-grinding, add to a glass sealed tube, add 2 Isoquinoline with a mass concentration of ‰ and a mixed solvent with a volume ratio of 0.5 mL of mesitylene and N-methylpyrrolidone at a volume ratio of 1:1 are mixed uniformly by ultrasound, and the reaction system is evacuated under liquid nitrogen freezing conditions, and repeated 3 times , the glass sealing tube was ablated by an alcohol blowtorch to seal it, the temperature of the reaction system was raised to 200° C., the reaction was carried out for 72 hours, and the crude product of the composite material was obtained after cooling.

[0038] 2) The crude product of the composite material synthesized...

Embodiment 3

[0041] A method for in-situ generation of a polyimide-type covalent organic framework material on the surface of a carbon material, the steps of which are as follows:

[0042] 1) Weigh 65.4 mg of pyromellitic anhydride, 58.0 mg of 1,3,5-tris(4-aminophenyl)amine, and 200 mg of single-walled carbon nanotubes, mix them uniformly through pre-grinding, add them to a hydrothermal kettle, and add 3 Isoquinoline with a mass concentration of ‰ and 1 mL of mesitylene solvent were mixed evenly by ultrasound, and the reaction system was evacuated under liquid nitrogen freezing conditions. The temperature of the system was raised to 160° C., reacted for 120 h, and the crude product of the composite material was obtained after cooling.

[0043] 2) The crude product of the composite material synthesized above was fully washed in methanol to remove unreacted monomers, then lyophilized and dried under vacuum at -30°C for 12 hours, and cooled to room temperature to obtain pyromellitic anhydride...

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Abstract

The invention discloses a method for in-situ generation of a polyimide covalent organic framework material on the surface of a carbon material. The polyimide type covalent organic framework-C60 / carbonnanotube in-situ composite material, which is constructed based on pyromellitic dianhydride, is synthesized in one step by utilizing pyromellitic dianhydride, a trifunctional amine monomer and a carbon nano material through a solvothermal process. The method is simple in preparation process, low in raw material cost, high in yield, free of by-products, low in equipment requirement and easy for industrial batch production. The prepared polyimide covalent organic framework has the advantages of large specific surface area, excellent heat resistance and the like. The synthesized composite material has the characteristics of developed pore structure, good thermal stability, good chemical stability and the like, and has important application prospects in the fields of electrochemistry, temperature-resistant materials, gas adsorption and the like.

Description

technical field [0001] The invention belongs to the field of preparation of covalent organic framework materials, and in particular relates to a method for in-situ generation of polyimide-type covalent organic framework materials on the surface of carbon materials. Background technique [0002] Covalent organic framework materials are a kind of organic porous polymers with high crystallinity and high specific surface area composed of light elements such as C, N, and H. They have the characteristics of regular channels, stable chemical properties, and high thermal stability. It has important research value and application prospects in the fields of adsorption and storage, optoelectronics, catalysis, and biological drug loading. Since this type of material was first reported in 2005, there have been many related reports, but most of them are studies on new topological structures and new monomers, but the application fields of covalent organic framework materials themselves are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08G73/10C08K7/24C08K3/04
CPCC08G83/008C08G73/1003C08G73/1067C08K3/041C08K2201/011
Inventor 袭锴宁方毅廖峭波黄新
Owner NANJING UNIV