Gas separation membrane as well as preparation method and application thereof

A gas separation membrane and thin film technology, which is applied in separation methods, semipermeable membrane separation, and dispersed particle separation, can solve the problems of rough surface of MOFs/polymer membrane, low gas separation performance and low gas selectivity, and achieve smooth surface And the effect of no defect, good flexibility and simple preparation process

Active Publication Date: 2022-04-08
NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of rough surface, low gas separation performance and low gas selectivity of existing three-dimensional structure MOFs / polymer membranes, and provides a gas separation membrane and its preparation method and application

Method used

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  • Gas separation membrane as well as preparation method and application thereof
  • Gas separation membrane as well as preparation method and application thereof
  • Gas separation membrane as well as preparation method and application thereof

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specific Embodiment approach 1

[0033] Specific embodiment one: a kind of gas separation membrane described in this embodiment, the gas separation membrane is made of two-dimensional CuBDC-NH 2Sheet-like stacked thin films prepared with polyurethane oligomers; the two-dimensional CuBDC-NH 2 It accounts for 20% to 60% of the total mass of the gas separation membrane.

[0034] This embodiment uses two-dimensional MOFs (two-dimensional CuBDC-NH 2 ) to replace the three-dimensional MOFs. Due to the ultrathin thickness and more accessible pore channels, 2D MOFs not only have more adsorption sites, but also are easier to form thin films with fewer defects. And the selected two-dimensional CuBDC-NH 2 Compared with ordinary two-dimensional MOFs, it has a modifiable -NH 2 Functional groups, therefore, functional group modification technology can be combined with polymers (polyurethane oligomers) for polymerization reactions to further improve the performance of the resulting film.

[0035] The beneficial effect ...

specific Embodiment approach 2

[0037] Specific embodiment two: the present embodiment is a kind of preparation method of gas separation membrane, and it is carried out according to the following steps:

[0038] 1. Two-dimensional CuBDC-NH 2 Preparation of:

[0039] 1. Add anhydrous copper acetate to the mixed solution A for dissolution to obtain anhydrous copper acetate solution;

[0040] ②. Add 2-aminoterephthalic acid to the mixed solution B to dissolve to obtain a 2-aminoterephthalic acid solution;

[0041] ③. Spray the anhydrous copper acetate solution into the 2-aminoterephthalic acid solution through an ultrasonic spray device, and let it stand to obtain a solid substance, which is washed and filtered to obtain a two-dimensional CuBDC-NH 2 solid;

[0042] The amount of substance ratio of the anhydrous copper acetate in the described anhydrous copper acetate solution and the 2-aminoterephthalic acid in the 2-aminoterephthalic acid solution is 1: (1~40);

[0043] Two, the preparation of polyurethane...

specific Embodiment approach 3

[0054] Specific embodiment 3: The difference between this embodiment and specific embodiment 2 is that the mixed solution A described in step ① is formed by ultrasonic dispersion of N, N-dimethylformamide and acetonitrile, and the N, N, The volume ratio of N-dimethylformamide to acetonitrile is 1:(0.1~10). Others are the same as in the second embodiment.

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Abstract

The invention discloses a gas separation membrane as well as a preparation method and application thereof, and belongs to the technical field of gas sensing detection. The invention aims to solve the problems of rough surface, low gas separation performance and low gas selectivity of the existing MOFs / polymer film with a three-dimensional structure. The method comprises the following steps: 1, preparing two-dimensional CuBDC-NH2; 2, preparing a polyurethane oligomer; and 3, preparation of the two-dimensional CuBDC-NH2 / polyurethane gas separation membrane. The invention is used for the gas separation membrane and the preparation method and application thereof.

Description

technical field [0001] The invention belongs to the technical field of gas sensing and detection. Background technique [0002] Nowadays, due to its clean and renewable characteristics, hydrogen has become an excellent alternative energy source to non-renewable energy sources such as fossil fuels. Hydrogen as a clean energy source can reduce pollution and thus lead to improved climate in the future. In the field of electrochemistry, hydrogen is used as a main component of fuel cells in the transportation industry and in the automotive field. Compared with gasoline / natural gas, the diffusion coefficient of hydrogen is about 12 times higher, and the buoyancy is about 52 times higher; compared with other energy sources such as fossil fuels, petroleum, and diesel, the combustion of hydrogen can provide higher energy density, so hydrogen is used as Fuel efficiency is higher. However, the diffusion coefficient of hydrogen is large, which is 0.62cm 2 / s, the explosion limit is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/48B01D67/00B01D53/22G01N33/00
CPCY02C20/40
Inventor 王烜赫夏露刘继江张伟岩刘志远
Owner NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
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