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A polypyrrole/polyimide composite porous catalytic membrane and its preparation method

A polyimide and polypyridine technology, which is applied in the field of polypyridine/polyimide composite porous catalytic membrane and its preparation, can solve problems such as performance limitations, and achieve cost reduction, multiple active centers, and good mechanical properties. performance effect

Active Publication Date: 2018-09-28
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyimide materials have good heat resistance, dimensional stability and mechanical properties. Although polyimide can be prepared by electrospinning to obtain nanofiber membranes, the prepared polyimide fiber membranes are used at high temperatures. Performance will be limited

Method used

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  • A polypyrrole/polyimide composite porous catalytic membrane and its preparation method
  • A polypyrrole/polyimide composite porous catalytic membrane and its preparation method
  • A polypyrrole/polyimide composite porous catalytic membrane and its preparation method

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preparation example Construction

[0049] In the preparation of the polypyrrone precursor solution in step (1), exemplary tetraacid monomers include, but are not limited to, 3,3′,5,5′-biphenyltetracarboxylic acid, 3,3′,4, 4'-Biphenyltetracarboxylic acid, 3,3',5,5'-benzophenone tetracarboxylic acid, 3,3',4,4'-benzophenone tetracarboxylic acid, 2,3,3',4'- Diphenyl ether tetracarboxylic acid, 3,3',5,5'-diphenyl ether tetracarboxylic acid, 3,3',4,4'-diphenyl ether tetracarboxylic acid, 3,3',5,5'-diphenyl ether tetracarboxylic acid Methyl methane tetracarboxylic acid, 3,3',4,4'-diphenylmethane tetracarboxylic acid, 2,2',3,3'-diphenylmethane tetracarboxylic acid, 2,2',3,4-diphenyl Methyl methane tetracarboxylic acid, 3,3',4,4'-bistrifluoromethyldiphenyltetracarboxylic acid, 3,3',5,5'-bistrifluoromethyldiphenyltetracarboxylic acid, 2,2 ',3,3'-bistrifluoromethyldiphenyltetracarboxylic acid, 2,2',4,4'-bistrifluoromethyldiphenyltetracarboxylic acid, 2,3,3',4'-bis Trifluoromethyldiphenyltetracarboxylic acid, 1,4,5,8-nap...

Embodiment 1

[0120] Under the condition of lower than 25° C., A1 and B1 monomers with a molar ratio of 1:1 were dissolved in C1, and magnetically stirred for 2 hours to obtain a polypyrrolene precursor solution with a mass concentration of 15%. The polyamic acid solution is mainly prepared from D1 and E1, wherein the molar ratio of D1, E1 to benzoic acid is 1:2:0.5; finally a polyamic acid (PAA) solution with a mass concentration of 20% is obtained. Then the PAA solution is added to the above-mentioned polypyrrolone precursor solution, and then the metal component: F1, pore-forming agent: G1; the polypyrrole precursor solution, the polyamic acid solution, the The mass ratio of the metal component to the pore-forming agent is: 100:50:10:20. Stir for 4 hours to make it evenly mixed to obtain a spinning mixture.

[0121] The spinning mixed solution was subjected to electrospinning, the spinning voltage was controlled at 15kV, and the distance from the spinning nozzle to the opposite electrod...

Embodiment 2

[0123] Under the condition of lower than 25° C., A2 and B2 monomers with a molar ratio of 1:1 were dissolved in C2, and magnetically stirred for 2 hours to obtain a polypyrrolone precursor solution with a mass concentration of 25%. The polyamic acid solution is mainly prepared from D2 and E2, wherein the molar ratio of D2, E2 and benzoic acid is 1:1:0.5; finally a polyamic acid (PAA) solution with a mass concentration of 15% is obtained. Then the PAA solution is added to the above-mentioned polypyrrole precursor solution, and then the metal component: F2, pore-forming agent: G2 are added in sequence; the polypyrrole precursor solution, the polyamic acid solution, the The mass ratio of the metal component to the pore-forming agent is: 100:80:5:10. Stir for 4 hours to make it evenly mixed to obtain a spinning mixture.

[0124] Electrospinning was carried out on the above-mentioned spinning mixed liquid, the spinning voltage was controlled at 40 kV, and the distance from the spi...

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Abstract

The invention discloses a polypyrrolone / polyimide composite porous catalytic film and a preparation method thereof. The preparation method includes following steps: 1), dissolving tetracid monomer and tetramine monomer in a solvent to obtain a polypyrrolone prepolymer solution; 2), sequentially adding a polyamic acid solution, metal components and pore former into the polypyrrolone prepolymer solution to obtain a mixed spinning solution, and forming a composite nano fiber precursor through electrostatic spinning; 3), subjecting the composite nano fiber precursor to vacuum drying and thermal treatment to obtain the polypyrrolone / polyimide composite porous catalytic film. The polypyrrolone / polyimide composite porous catalytic film obtained by the method has high heat resistance and mechanical performance when being applied in the field of petroleum catalysis, and expense needed for separating reaction liquid from a catalyst is reduced.

Description

technical field [0001] The present invention relates to the technical field of a polypyrrole / polyimide composite porous catalytic membrane and its preparation, in particular to a polypyrrole / polyimide composite porous catalytic membrane prepared by an electrospinning process and its application in petroleum Applications in the field of catalysis. technical background [0002] The petroleum industry is an important measure of a country's development. At present, the catalytic reactions in the petrochemical field are basically carried out under high temperature and high pressure. Most of the catalysts used in this type of reaction are in the form of powder. Separation processing will increase the cost of separation. Polypyrrone is a kind of high-strength, high-modulus, and rigid ladder-shaped or semi-ladder-shaped polyaryl heterocyclic macromolecular polymers. These polymers are generally polymerized at high temperatures in high-boiling point solvents such as polyphosphoric a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/58B01J31/06B01J35/06
Inventor 侯豪情丁义纯许文慧陈林林简少菊徐海波
Owner JIANGXI NORMAL UNIV
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