SPEEK (Sulfonated Polyether Ether Ketone) mixed matrix membrane with in-situ doped carbon quantum dots as well as preparation method and application thereof

A sulfonated polyether ether ketone and mixed matrix membrane technology, applied in chemical instruments and methods, separation methods, membrane technology and other directions, can solve the problems of low gas permeability and high crystallinity, achieve low cost and easy availability of raw materials, improve Penetration, the effect of improving dispersibility

Active Publication Date: 2018-11-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong interaction between molecular chains and high crystallinity of the sulfonated polyetheretherketone membrane, the dissolution mechanism of the membrane is restricted by the diffusion mechanism, resulting in generally low gas permeability.

Method used

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  • SPEEK (Sulfonated Polyether Ether Ketone) mixed matrix membrane with in-situ doped carbon quantum dots as well as preparation method and application thereof

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Effect test

Embodiment 1

[0031] Example 1: The preparation method of the sulfonated polyether ether ketone composite film doped with carbon quantum dots in situ according to the present invention, the steps are as follows:

[0032] (1) Take a porous polysulfone membrane with a molecular weight cut-off of 6000 as a supporting membrane, soak it in a 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it for later use.

[0033] (2) Sulfonated polyether ether ketone composite material doped with carbon quantum dots in situ: Polyvinyl alcohol and polyether ether ketone are dried in a vacuum drying oven at 80°C for 24 to remove residual moisture. Add the dried solid mixture of polyether ether ketone to polyvinyl alcohol with a mass ratio of 99.75%: 0.25% to the concentrated sulfuric acid solution (the mass ratio of solid mixture to concentrated sulfuric acid is 1:10), at a temperature of 25°C Under the conditions, after mechanical stirring at 250rpm for 6h, the temperature was raised to 60°C a...

Embodiment 2

[0036] Embodiment 2: The method for preparing the sulfonated polyether ether ketone composite film doped with carbon quantum dots in situ according to the present invention, the steps are as follows:

[0037] (1) Take a porous polysulfone membrane with a molecular weight cut-off of 6000 as a supporting membrane, soak it in a 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it for later use.

[0038] (2) Sulfonated polyether ether ketone composite material doped with carbon quantum dots in situ: PVA and polyether ether ketone are dried in a vacuum drying oven at 80°C for 24 hours to remove residual moisture. Add the dried solid mixture of polyether ether ketone to polyvinyl alcohol with a mass ratio of 99.50%:0.50% to the concentrated sulfuric acid solution (the mass ratio of solid mixture to concentrated sulfuric acid is 1:10), at a temperature of 25°C Under the conditions, after mechanical stirring at 250rpm for 6h, the temperature was raised to 60°C and reac...

Embodiment 3

[0041] Example 3: The method for preparing the sulfonated polyether ether ketone composite film doped with carbon quantum dots in situ according to the present invention, the steps are as follows:

[0042] (1) Take a porous polysulfone membrane with a molecular weight cut-off of 6000 as a supporting membrane, soak it in a 2% ethylenediamine aqueous solution at 30°C for 72 hours, wash and dry it for later use.

[0043] (2) Sulfonated polyether ether ketone composite material doped with carbon quantum dots in situ: PVA and polyether ether ketone are dried in a vacuum drying oven at 80°C for 24 hours to remove residual moisture. Add the dried solid mixture of polyether ether ketone to polyvinyl alcohol with a mass ratio of 99.00%:1.00% to the concentrated sulfuric acid solution (the mass ratio of solid mixture to concentrated sulfuric acid is 1:10), at a temperature of 25°C Under the conditions, after mechanical stirring at 250rpm for 6h, the temperature was raised to 60°C and reacted...

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Abstract

The invention discloses an SPEEK (Sulfonated Polyether Ether Ketone) mixed matrix membrane with in-situ doped carbon quantum dots as well as a preparation method and application thereof. The preparation method comprises the following steps: taking polyvinyl alcohol and polyether ether ketone as raw materials and adding the raw materials in concentrated sulfuric acid, and reacting, thus obtaining an SPEEK composite material with the in-situ doped carbon quantum dots; dissolving the SPEEK composite material into deionized water, thus preparing a membrane casting solution; preparing a functionallayer on the surface of a microporous filter membrane through a coating method, and forming the SPEEK mixed matrix membrane of the in-situ doped carbon quantum dots, the mixed matrix membrane is formed by SPEEK and carbon quantum dots, wherein the carbon quantum dots account for 0.1 to 5.0 percent by mass of the SPEEK.. The preparation method provided by the invention is simple and easy, a prepared functional membrane can be applied to CO2/N2 gas separation, and higher CO2 permeability and separation factors are obtained.

Description

Technical field [0001] The invention relates to a sulfonated polyetheretherketone mixed matrix membrane doped with carbon quantum dots in situ, and a preparation method and application thereof, belonging to the technical field of chemical engineering membrane separation. Background technique [0002] Sulfonated polyether ether ketone contains sulfonic acid groups on the molecular chain to CO 2 It has a strong affinity and is often used to prepare CO 2 Separation membrane. Moreover, the sulfonated polyether ether ketone has a simple preparation process and low cost, so it has a good industrial application prospect. However, due to the strong interaction between the molecular chains of the sulfonated polyetheretherketone membrane and the high crystallinity, the dissolution mechanism of the membrane is restricted by the diffusion mechanism, resulting in generally low gas permeability. Fine control of CO of sulfonated polyether ether ketone 2 The structure of the separation membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/52B01D67/00B01D53/22
CPCB01D53/228B01D67/0079B01D71/52B01D2256/22
Inventor 王永洪张新儒侯蒙杰刘成岑
Owner TAIYUAN UNIV OF TECH
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