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Method for preparing mixed matrix membranes for carbon dioxide separation by chemical bridging

A technology of mixed matrix membrane and carbon dioxide, applied in separation methods, chemical instruments and methods, semi-permeable membrane separation, etc., can solve the problems of low permeation selectivity and weak interface force of separation membranes, and achieve simple preparation process and short operation time Effect of short, excellent permeation selectivity properties

Active Publication Date: 2019-11-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the research results mentioned above can improve the interfacial compatibility between polymers and nanoparticles to varying degrees, the force at the interface is still very weak, and the permeation selectivity of the separation membrane is low (currently under 0.11MPa , the carbon dioxide permeation rate of the mixed matrix membrane is about 500GPU, and the carbon dioxide / nitrogen separation factor is 50)

Method used

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  • Method for preparing mixed matrix membranes for carbon dioxide separation by chemical bridging
  • Method for preparing mixed matrix membranes for carbon dioxide separation by chemical bridging
  • Method for preparing mixed matrix membranes for carbon dioxide separation by chemical bridging

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1)N 2 protected, the UIO-66-NH 2 Add the powder into n-decyl alcohol to form a solution with a concentration of 12.5g / L, disperse and stir and ultrasonically uniform; add excess PEGDE dropwise to UIO-66-NH 2 In dispersion, N 2 Under protected conditions, the temperature of the dispersion was raised to 115° C. through an oil bath, and the reaction was carried out for 40 hours.

[0031] (2) Finally, excess unreacted PEGDE and solvent n-decanol were washed with methanol, and washed by centrifugation. The solid obtained by centrifugation was dried in vacuo to obtain PEG-UIO-66-NH 2 .

[0032] (3) PEG-UIO-66-NH obtained in step 2 2Nanoparticles dispersed in 1wt% polyvinylamine aqueous solution, PEG-UIO-66-NH 2 The amount of nanoparticles added is configured as 10wt%, N 2 Under protection, heat at 65°C in an oil bath and stir for 20 min to obtain a light yellow dispersion.

[0033] (4) Apply the dispersion in step 3 on the polysulfone ultrafiltration membrane, and dr...

Embodiment 2

[0036] (1)N 2 protected, the UIO-66-NH 2 Add the powder into n-decyl alcohol to form a solution with a concentration of 12.7g / L, disperse, stir and ultrasonically homogenize. Add excess PEGDE dropwise to UIO-66-NH 2 In dispersion, N 2 Under the condition of protection, the temperature of the dispersion liquid was raised to 120° C. through an oil bath, and the reaction was carried out for 45 hours.

[0037] (2) Finally, excess unreacted PEGDE and solvent n-decanol were washed with methanol, and washed by centrifugation. The solid obtained by centrifugation was dried in vacuo to obtain PEG-UIO-66-NH 2 .

[0038] (3) PEG-UIO-66-NH obtained in step 2 2 Nanoparticles dispersed in 1wt% polyvinylamine aqueous solution, PEG-UIO-66-NH 2 The amount of nanoparticles added is configured as 20wt%, N 2 Under protection, heat at 70°C in an oil bath and stir for 23 minutes to obtain a light yellow dispersion.

[0039] (4) Apply the dispersion liquid obtained in step 3 on the polysulf...

Embodiment 3

[0042] (1)N 2 protected, the UIO-66-NH 2 Add the powder into n-decyl alcohol to form a solution with a concentration of 12.8g / L, disperse, stir and ultrasonically homogenize. Add excess PEGDE dropwise to UIO-66-NH 2 In dispersion, N 2 Under protected conditions, the temperature of the dispersion was raised to 123° C. through an oil bath, and the reaction was carried out for 48 hours.

[0043] (2) Finally, excess unreacted PEGDE and solvent n-decanol were washed with methanol, and washed by centrifugation. The solid obtained by centrifugation was dried in vacuo to obtain PEG-UIO-66-NH 2 .

[0044] (3) PEG-UIO-66-NH obtained in step 2 2 Nanoparticles dispersed in 1wt% polyvinylamine aqueous solution, PEG-UIO-66-NH 2 The amount of nanoparticles added is configured as 30wt%, N 2 Under protection, heat at 73°C in an oil bath and stir for 27 minutes to obtain a light yellow dispersion.

[0045] (4) Apply the dispersion liquid obtained in step 3 on the polysulfone ultrafiltr...

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Abstract

The present invention relates to a method for preparing a mixed matrix membrane for carbon dioxide separation through chemical bridging. According to the present invention, nanoparticles and a polymerare bonded with a bridging agent polyethylene glycol diglycidyl ether through a chemical method to enhance the interfacial action force of UIO-66-NH2 and polyvinylamine, and by enhancing the interfacial action force, the interfacial compatibility of the nanoparticles UIO-66-NH2 and the polymer PVAm is improved to reduce the interface defect so as to obtain the mixed matrix membrane with high permeation selectivity, wherein the CO2 permeation rate reaches 1000 GPU under 0.11 MPa, and the CO2 / N2 separation factor reaches 70; and the preparation method has characteristics of simple preparation process, short operation time, easy implementation and low cost; and after the chemical bridging, the interface compatibility of the two phases is substantially improved while the gas separation membrane with excellent permeation selectivity is obtained.

Description

technical field [0001] The invention relates to a method for preparing a mixed matrix membrane for carbon dioxide separation through chemical bridging; through chemical bridging, the interfacial compatibility between nanoparticles and polymers is improved and a high-performance mixed matrix membrane is prepared, belonging to composite gas separation the field of membrane preparation. Background technique [0002] With the development of economic globalization, environmental issues and energy issues have become urgent problems in economic development. The combustion of traditional fossil fuels such as coal and oil has brought serious environmental pollution problems. CO 2 A large amount of emissions cause global climate change and damage to ecosystems. CO 2 Emission reduction has become a major global issue. Currently common CO 2 Separation techniques include cryogenic separation, adsorption, absorption and membrane separation. The membrane separation method has the ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D67/00B01D61/14B01D53/22
CPCB01D53/228B01D61/145B01D67/0002B01D71/68B01D2257/504Y02C20/40
Inventor 王志许瑞董松林生梦龙王纪孝
Owner TIANJIN UNIV
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