High-performance non-linear non-ether group doped mixed-matrix film

A mixed matrix membrane and non-linear technology, applied in membrane technology, semi-permeable membrane separation, climate sustainability, etc., can solve the problems of low free volume and poor permeability of materials, and achieve the effect of improving gas permeability

Active Publication Date: 2019-07-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the problem of low free volume and poor permeability of the material caused by the strong rigidity of the filler, the filler used in the present invention has a nonlinear structure, which can effectively increase the free volume, and by adjusting the molecular chain of the filler, it can Simultaneously increasing the CO of the mixed matrix membrane 2 Separation performance and thermal stability

Method used

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  • High-performance non-linear non-ether group doped mixed-matrix film
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  • High-performance non-linear non-ether group doped mixed-matrix film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Weigh a certain mass of Pebax particles and add them to ethanol / water (70wt% / 30wt%), stir at ~80°C for 4 hours to obtain a uniform and transparent 5wt% Pebax solution, then cast it on a PTFE plate, and evaporate the solvent at room temperature , take it off after the film is formed, put it in a vacuum oven at 40°C for at least 48 hours, remove the residual solvent, and obtain a pure Pebax film, whose gas permeability is shown in Table 1.

Embodiment 2

[0082] First prepare the ethanol / water (70 / 30wt%) solution of 5wt% Pebax, then the aminated multi-walled carbon nanotubes (MWNTs-NH 2 ) was added, and then sonicated for at least 2h to improve the MWNTs-NH 2 After ultrasonication, stir the solution at room temperature for 4 hours, then cast it on a PTFE plate, evaporate the solvent at room temperature, remove it after the film is formed, put it in a vacuum oven at 40°C for at least 48 hours, remove the residual solvent, and obtain a mass ratio of 10:1 Pebax / MWNTs-NH 2 Mixed matrix membrane, Pebax and MWNTs-NH 2 The mass fractions are 91wt% and 9wt%, respectively, and their gas permeability properties are shown in Table 1 and figure 1 , the cross-sectional scanning electron microscope sees figure 2 .

Embodiment 3

[0084] First prepare the ethanol / water (70 / 30wt%) solution of 5wt% Pebax, then the aminated multi-walled carbon nanotubes (MWNTs-NH 2 ) was added, and then sonicated for at least 2h to improve the MWNTs-NH 2 After ultrasonication, stir the solution at room temperature for 4 hours, then cast it on a PTFE plate, evaporate the solvent at room temperature, remove it after the film is formed, put it in a vacuum oven at 40°C for at least 48 hours, remove the residual solvent, and obtain a mass ratio of 10:5 Pebax / MWNTs-NH 2 Mixed matrix membrane, Pebax and MWNTs-NH 2 The mass fractions are 67wt% and 33wt%, respectively, and the gas permeability properties at 35°C and 0.7MPa are shown in Table 1.

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Abstract

The invention provides a high-performance non-linear non-ether group doped mixed-matrix film. The high-performance non-linear non-ether group doped mixed-matrix film comprises, by mass, 20 to 100% ofa polymer matrix, 0 to 80% of a main body filling material, and 0 to 50wt% of an auxiliary filling material. The main body filling material is prepared from a material which possesses a non-linear structure and contains groups such as ester groups, nitrile groups, and carbonyl groups, so that uniform dispersion of the auxiliary filling material can be promoted effectively; the plurality of kinds of filling materials are capable of acting in the two aspects of gas dissolvability and diffusivity at the same time, and mixed matrix film gas penetration performance can be improved more effectively;the filling material chain carbon number, i.e. chain length is adjusted, so that the temperature resistance and the penetration performance of the obtained mixed matrix film can be improved. The prepared high-performance non-linear non-ether group doped mixed-matrix film possesses excellent separation performance on acidic gas CO2, SO2 and H2S.

Description

technical field [0001] The invention relates to the technical field of gas separation membranes, in particular to a high-performance nonlinear non-ether group-doped mixed matrix membrane. Background technique [0002] Acid gases (such as CO 2 , SO 2 、H 2 The removal of S) is a major issue related to global energy and the environment, especially CO 2 , the climate change caused by its excessive emissions has become a huge crisis faced by all countries in the world, of which 55% of CO 2 Flue gases originating from thermal power plants and other industrial processes. Gas membrane separation technology is CO 2 It is an important technology for capture and separation, but its osmotic separation and stability problems restrict the application of this technology. The development of new membrane separation materials with high permeable separation and good stability is the current CO 2 The development direction of separation membrane. [0003] The ether oxygen (EO) group is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22B01D69/14B01D67/00C08J5/18C08L77/00
CPCB01D53/228B01D69/141B01D67/0009C08J5/18B01D2257/504B01D2256/10B01D2257/302B01D2257/304C08J2377/00Y02P20/50Y02P20/54
Inventor 赵丹任吉中伍勇东李晖花开胜季洁梅邓麦村
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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