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A kind of mechanical preparation method of aromatic polyimide porous material

A porous material, polyimide technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of long reaction time and high energy consumption, and achieve the effect of short time consumption

Active Publication Date: 2018-10-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method usually adopts solvothermal method, which requires high temperature and high pressure and a large amount of organic solvent, and has certain requirements for equipment.
Simultaneously, the reaction time of this method is longer, and energy consumption is big

Method used

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  • A kind of mechanical preparation method of aromatic polyimide porous material
  • A kind of mechanical preparation method of aromatic polyimide porous material
  • A kind of mechanical preparation method of aromatic polyimide porous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Two monomers of trimesaldehyde (81.07mg, 0.5mmoL) and 1,5-naphthalene diamine (118.65mg, 0.75mmoL) were placed in an agate mortar (75mm inner diameter), and dimethylformamide and 0.2 mL each of 6 mol / L acetic acid solution, and then grind at room temperature with a pestle. After grinding, it was washed with anhydrous acetone for 48 hours in a Soxhlet extraction device to remove unreacted raw materials and oligomers, and finally placed in a vacuum oven at 50°C for two days to obtain porous aromatic polyimide materials. . The yield is 28.5%, and the BET specific surface area is 5.7m 2 / g.

Embodiment 2

[0042] Two monomers of trimesaldehyde (81.07mg, 0.5mmoL) and p-phenylenediamine (81.11mg, 0.75mmoL) were placed in an agate mortar (75mm inner diameter), and dimethylformamide and 6mol / L 0.2 mL each of the acetic acid solution and then ground using a pestle at room temperature. After grinding, it was washed with anhydrous acetone for 48 hours in a Soxhlet extraction device to remove unreacted raw materials and oligomers, and finally placed in a vacuum oven at 50°C for two days to obtain porous aromatic polyimide materials. . The yield is 38.6%, and the BET specific surface area is 15.4m 2 / g.

Embodiment 3

[0044] Two monomers of trimesaldehyde (81.07mg, 0.5mmoL) and m-phenylenediamine (81.11mg, 0.75mmoL) were placed in an agate mortar (75mm inner diameter), and dimethylformamide and 6mol / L 0.2 mL each of the acetic acid solution and then ground using a pestle at room temperature. After grinding, it was washed with anhydrous acetone for 48 hours in a Soxhlet extraction device to remove unreacted raw materials and oligomers, and finally placed in a vacuum oven at 50°C for two days to obtain porous aromatic polyimide materials. . The yield is 41.9%, and the BET specific surface area is 30m 2 / g.

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Abstract

The invention relates to a mechanical preparation method of an aromatic polyimide porous material. The method comprises the following steps: placing two monomers of benzenetricarboxaldehyde and aromatic diamine in a mortar; dropwise adding dimethylformamide and an acetic acid solution; grinding at the room temperature for 1 to 4 hours; then washing and drying to obtain the porous material. By adopting a mechanical synthesis method, a dehydration condensation reaction is carried out between an aldehyde group and an amine group to produce the aromatic polyimide porous material; the aromatic polyimide porous material has application potentials on the aspects of gas storage and separation, supercapacitors, catalyst carriers and sensors.

Description

technical field [0001] The invention belongs to the field of preparation of porous materials, in particular to a mechanical preparation method of aromatic polyimide porous materials. Background technique [0002] Porous material is a material with a network structure composed of interpenetrating or closed pores. According to the element composition and bonding mode, porous materials can be divided into three types: inorganic, inorganic-organic hybrid and pure organic. Generally speaking, the molecular structures of inorganic porous materials and inorganic-organic hybrid porous materials, such as activated carbon and molecular sieves, cannot be designed and their chemical functions cannot be adjusted. Organic porous materials are emerging porous materials. The organic units composed of light elements are formed by covalent bonds, so they have the advantages of rich skeleton composition, strong modification, good stability, high specific surface area, and adjustable pore stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/08B01J20/26B01J20/30B01D53/02H01G11/00B01J32/00
CPCY02E60/13
Inventor 廖耀祖李佳欢
Owner DONGHUA UNIV