Graphene oxide/Pebax hollow fiber membrane and preparation method thereof

A technology of fiber membrane and graphene, which is applied in chemical instruments and methods, separation methods, membranes, etc., can solve the problems of poor repeatability and low gas flux, and achieve the goal of maintaining separation factor, improving gas permeation flux, and simple operation Effect

Active Publication Date: 2016-03-16
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, as far as the research and application of GO in the field of gas separation is concerned, it is still in the stage of laboratory exploration, mainly focusing on the category of flat membranes. However, flat membranes are facing problems such as low gas flux and poor repeatability. Actual industrial scale-up
There is no report on the application of GO to hollow fiber membranes in the field of gas separation

Method used

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  • Graphene oxide/Pebax hollow fiber membrane and preparation method thereof
  • Graphene oxide/Pebax hollow fiber membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Transition layer casting solution A formula: PTMSP (polytrimethylsilyl-1-propyne) 3wt%, solvent is n-hexane;

[0036] Separation layer casting solution B formula: Pebax-1657 (block polyetheramide resin) 3wt%, solvent is ethanol / water mixture (mass ratio: 7:3).

[0037] The preparation method of graphene oxide / Pebax hollow fiber membrane is as follows:

[0038]A commercially available hollow fiber membrane made of PVDF was immersed in deionized water for 24 hours, and then wiped with absorbent paper to remove surface moisture.

[0039] Dissolve PTMSP in n-hexane, and stir it on an electromagnetic stirrer for 2 hours to form a uniform casting solution A, and then use a coating machine to coat the hollow fiber membrane. The operating parameters of the coating machine are set as follows: the descending speed is 0.8cm / s, the residence time is 60s, and the ascending speed is 0.3cm / s. One end of the fixed hollow fiber membrane first enters the casting solution, and when the ...

Embodiment 2

[0044] Transition layer casting solution A formula: PTMSP (polytrimethylsilyl-1-propyne) 3%, solvent is n-hexane;

[0045] Separation layer casting solution B formula: Pebax-1657 (block polyether amide resin) 3%, GO (graphene oxide) 0.1%, solvent is ethanol / water mixture (mass ratio 7:3).

[0046] Immerse the hollow fiber membrane made of PVDF in deionized water for 18 hours, take it out and wipe it with absorbent paper to remove the surface moisture.

[0047] Dissolve PTMSP in n-hexane, and stir it on an electromagnetic stirrer for 2 hours to form a uniform casting solution A, and then use a coating machine to coat the hollow fiber membrane. Set the operating parameters of the coating machine: the descending speed is 0.8cm / s, the residence time is 90s, and the ascending speed is 0.3cm / s. One end of the fixed hollow fiber membrane enters the casting solution first, and when the first coating is completed, it is placed in a 50°C drying oven for 24 hours, and then the other end...

Embodiment 3

[0051] Transition layer casting solution A formula: PTMSP (polytrimethylsilyl-1-propyne) 3%, solvent is n-hexane;

[0052] Separation layer casting solution B formula: Pebax-1657 (block polyether amide resin) 3%, GO (graphene oxide) 0.2%, solvent is ethanol / water mixture (mass ratio 7:3).

[0053] Immerse the hollow fiber membrane made of PVDF in deionized water for 16 hours, take it out and wipe it with absorbent paper to remove the surface moisture.

[0054] Dissolve PTMSP in n-hexane and stir it on an electromagnetic stirrer for 1 hour to form a uniform casting liquid A, and then use a coating machine to coat the hollow fiber membrane. Set the operating parameters of the coating machine: the descending speed is 0.8cm / s, the residence time is 60s, and the ascending speed is 0.3cm / s. One end of the fixed hollow fiber membrane enters the casting solution first, and when the first coating is completed, it is placed in a 55°C drying oven for 24 hours, and then the other end ent...

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Abstract

The invention belongs to the technical field of membrane preparation, and mainly relates to a graphene oxide / Pebax hollow fiber membrane and a preparation method thereof. The preparation method comprises the following steps: pretreating a basement membrane until micropores of the basement membrane are filled with water, and then coating a transition layer and a separating layer on the basement membrane, thereby obtaining the graphene oxide / Pebax hollow fiber membrane, wherein the basement membrane is the hollow fiber membrane. The method is simple to operate; is used for creatively applying GO to the field of gas separation, has a good separation effect to the CO2 / N2 mixed gas, enhances the CO2 permeation flux greatly, and meanwhile keeps the stable separation factor. As a novel gas separation membrane, the graphene oxide / Pebax hollow fiber membrane is expected to be widely applied to the actual industrial field.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation, and mainly relates to a graphene oxide / Pebax hollow fiber membrane and a preparation method thereof. Background technique [0002] With the further improvement of global industrialization, the demand for energy will further increase in the 21st century. It is reported that more than 80% of the current energy consumption comes from fossil fuels. However, the combustion of fossil fuels will inevitably bring about some global problems, and the most concerned one is CO2. 2 Gas emission issues. [0003] Current control and reduction of CO 2 There are three emission technologies: one is to adopt alternative technologies for fossil energy; the other is to improve energy efficiency to reduce CO 2 emissions; the third is CO 2 capture and storage technology. In the short run, CO 2 Capture and storage is the most effective way to achieve a win-win situation between economic development an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22B01D69/08B01D69/12B01D71/02B01D71/56B01D71/68B01D67/00
CPCB01D53/228B01D67/0079B01D67/0088B01D69/08B01D69/12B01D71/024B01D71/56B01D71/68B01D2323/26B01D2323/50
Inventor 张亚涛刘金盾张浩勤董冠英申亦佳
Owner ZHENGZHOU UNIV
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