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Ionic liquid modified graphene oxide/polymer composite film, preparation method and applications thereof

A technology of ionic liquids and high molecular polymers, applied in the field of ionic liquid modified graphene oxide/polymer composite membranes, can solve the problems of ionic liquids easily taken away by feed liquid, poor stability of pervaporation membranes, loss, etc., to achieve Good separation factor and permeation flux, mild process conditions, and simple preparation steps

Active Publication Date: 2018-10-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ionic liquids have been widely used in the field of pervaporation separation, such as ionic liquid supported liquid membranes, etc., but such pervaporation membranes have poor stability
During the pervaporation process, the ionic liquid is easily taken away by the feed liquid, resulting in the loss of the ionic liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The ionic liquid modified graphene oxide / polymer composite membrane of this embodiment includes a high molecular polymer membrane material and an ionic liquid modified graphene oxide powder dispersed therein. The ionic liquid modified graphene oxide powder is obtained by combining the ionic liquid It is formed by connecting to the surface of the graphene oxide layer by a coupling agent, wherein the graphene oxide powder is commercially available graphene oxide (GO), and the ionic liquid is N-octylpyridine bistrifluoromethanesulfonimide salt (IL1) The polymer membrane material is polyether block copolyamide (PEBA), and the mass ratio of ionic liquid modified graphene oxide powder (GO-IL1) to PEBA is about 1:100. The composite membrane can be applied to butanol In the pervaporation separation of butanol with water system, the specific preparation steps of the composite membrane are as follows:

[0039] (1) Ultrasonic dispersion of graphene oxide

[0040] Weigh 0.2 g of graphe...

Embodiment 2

[0050] The ionic liquid modified graphene oxide / polymer composite membrane of this embodiment includes a high molecular polymer membrane material and an ionic liquid modified graphene oxide powder dispersed therein. The ionic liquid modified graphene oxide powder is obtained by combining the ionic liquid It is formed by connecting to the surface of the graphene oxide layer by a coupling agent, where the graphene oxide powder is commercially available graphene oxide (GO), and the ionic liquid is trihexyl (tetradecyl) phosphine dicyanamide (IL2). The molecular polymer membrane material is polyether block copolyamide (PEBA), and the mass ratio of ionic liquid modified graphene oxide powder (GO-IL2) to PEBA is about 1:100. The composite membrane can be applied to butanol / water In the system pervaporation and separation of butanol, the specific preparation steps of the composite membrane are as follows:

[0051] (1) Graphene oxide ultrasonic dispersion

[0052] Weigh 0.2 g of graphene ...

Embodiment 3

[0062] The ionic liquid modified graphene oxide / polymer composite film of this embodiment includes a high molecular polymer film and an ionic liquid modified graphene oxide powder dispersed therein. The ionic liquid modified graphene oxide powder is passed through the ionic liquid The coupling agent is connected to the surface of the graphene oxide layer and formed between the layers. The graphene oxide powder is commercially available graphene oxide (GO), and the ionic liquid is N-octylpyridine bistrifluoromethanesulfonimide salt ( IL1), the polymer membrane material is polyether block copolyamide (PEBA), and the mass ratio of ionic liquid modified graphene oxide powder (GO-IL1) to PEBA is about 0.6:100. The composite membrane can be used in In the butanol / water system pervaporation separation of butanol, the specific preparation steps of the composite membrane are as follows:

[0063] (1) Graphene oxide ultrasonic dispersion

[0064] Weigh 0.2 g of graphene oxide powder, add an ...

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Abstract

The invention relates to an ionic liquid modified graphene oxide / polymer composite film, a preparation method and applications thereof, wherein the composite film is prepared from the following raw materials by weight: 100 parts of a macromolecule polymer film material, and 0.1-2 parts of ionic liquid modified graphene oxide powder, and an ionic liquid is linked to the interlayer and the surface of silanized graphene oxide through bonding to prepare the ionic liquid modified graphene oxide powder. According to the preparation, graphene oxide is firstly prepared, an ionic liquid is linked to the interlayer and the surface of the graphene oxide, a film casting liquid is formed with a macromolecule polymer film material in an organic solvent, and finally film scraping molding is performed toobtain the composite film. Compared to the film in the prior art, the film of the present invention has the following characteristic that the ionic liquid modified graphene oxide is used in the modification of the pervaporation film, such that the disadvantage that the direct application of the ionic liquid in the modification of the pervaporation film can cause the easy loss of the ionic liquid so as to cause the poor stability of the film can be overcome.

Description

Technical field [0001] The invention belongs to the field of pervaporation membrane separation, and relates to an ionic liquid modified graphene oxide / polymer composite membrane and its preparation and application. Background technique [0002] Nowadays, the energy used by mankind mainly comes from fossil energy. They are all non-renewable resources, and their reserves are declining. The research of new renewable energy is paid more and more attention. Biofuels can replace gasoline and diesel made from petroleum. They have the characteristics of a wide range of sources, recyclability, and environmental friendliness. They are an important area of ​​renewable energy development. In recent years, the most researched biofuels mainly include: bioethanol, biobutanol, etc. Among them, biobutanol has a lower vapor pressure than bioethanol, can be easily blended with gasoline, and has low corrosiveness and high calorific value. , High octane number and other advantages. Bio-butanol is p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00B01D61/36B01D17/00
CPCB01D17/085B01D61/362B01D67/0079B01D69/12B01D69/125
Inventor 伍艳辉孔祥彬杨磊唐汪洋
Owner TONGJI UNIV
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