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Organic amine modified graphene oxide/polymer composite film and its preparation and application

A technology of polymer membrane and organic amine, which is applied in the field of organic amine modified graphene oxide/polymer composite membrane, can solve the problems of poor stability of GO layer, complicated membrane making method, and large dosage, so as to improve the separation factor and permeation flux, membrane structure optimization, and enhanced hydrophobicity

Active Publication Date: 2021-03-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The application object of this patent is dehydration from high-concentration organic solvents. The application object of this application is to remove organic matter from low-concentration wastewater to achieve the purpose of ethanol or butanol recovery. The applicable objects are different, and the patent is in the modified porous Dip-coating GO solution on the ceramic tube for many times, the amount of GO is large, the method of film formation is complicated, and the stability of the GO layer is not strong

Method used

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  • Organic amine modified graphene oxide/polymer composite film and its preparation and application
  • Organic amine modified graphene oxide/polymer composite film and its preparation and application
  • Organic amine modified graphene oxide/polymer composite film and its preparation and application

Examples

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Embodiment 1

[0040] An organic amine modified graphene oxide / polymer composite membrane, the composite membrane includes a pervaporation membrane and an organic amine modified graphene oxide powder dispersed therein, the organic amine modified graphene oxide powder is formed by organic amine and oxidation Oxygen-containing functional groups on the surface of graphene were formed by reaction, wherein the graphene oxide powder was commercially available graphene oxide (GO, with a sheet diameter of 0.5-5 μm), the organic amine was polyetheramine D-230, and the pervaporation membrane material was poly Ether block copolyamide (PEBA), the mass ratio of organic amine modified graphene oxide powder (PEA-GO) to PEBA is about 1:100, this composite membrane can be applied in butanol / water system pervaporation separation of butanol , the specific preparation steps of the composite membrane are as follows:

[0041] Weigh a certain mass of graphene oxide powder and add an appropriate amount of N,N-dimet...

Embodiment 2

[0043]An organic amine modified graphene oxide / polymer composite membrane, the composite membrane includes a pervaporation membrane and an organic amine modified graphene oxide powder dispersed therein, the organic amine modified graphene oxide powder is formed by organic amine and oxidation Oxygen-containing functional groups on the surface of graphene are formed by reaction. Among them, the graphene oxide powder is commercially available graphene oxide (GO, with a sheet diameter of 0.5-5 μm), the organic amine is dodecylamine, and the pervaporation membrane material is polyether Block copolyamide (PEBA), the mass ratio of organic amine-modified graphene oxide powder (C12-GO) to PEBA is about 1:100, this composite membrane can be applied in butanol / water system pervaporation separation of butanol, The concrete preparation steps of this composite film are as follows:

[0044] Weigh a certain mass of graphene oxide powder and add an appropriate amount of n-hexane to stir proper...

Embodiment 3

[0049] This embodiment is basically the same as Embodiment 1, except that, in this embodiment, D400 polyetheramine is selected as the organic amine.

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Abstract

The invention relates to an organic amine modified graphene oxide / polymer composite film and preparation and application thereof. The composite film comprises a polymer film and organic amine modified graphene oxide powder dispersed in the polymer film, wherein the organic amine modified graphene oxide powder is obtained by connecting organic amine to a lamellar structure of graphene oxide powder. The preparation method of the composite film comprises the following steps of: connecting the organic amine to the graphene oxide sheet, forming a casting solution from the organic amine and a polymer film material in an organic solvent, and finally forming by film scraping. Compared with the prior art, the organic amine modified graphene oxide / polymer composite film can be applied to the pervaporation separation of butanol / water and ethanol / water systems with preferential alcohol permeation, breaks the "trade-off" effect of pervaporation, and simultaneously improves the separation factor and permeation flux of pervaporation separation of an alcohol / water solution.

Description

technical field [0001] The invention belongs to the field of pervaporation membrane separation, and relates to an organic amine-modified graphene oxide / polymer composite membrane and its preparation and application. Background technique [0002] Ethanol and butanol are new biofuels that can replace traditional fossil fuels. They have advantages in terms of fuel performance and economy. Bioethanol and biobutanol are mainly derived from fermentation broth. The separation of ethanol, butanol and water is beneficial to the industrialization of biofuels. Significance. [0003] Pervaporation is a new membrane separation technology, which has the advantages of low energy consumption and high separation efficiency for the separation of alcohols / water systems. At present, pervaporation membrane separation technology has attracted the attention of scholars at home and abroad and achieved industrialization. The application of pervaporation technology mainly has three aspects: organic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/56B01D71/70B01D71/54B01D69/12B01D69/02B01D67/00B01D61/36C07C29/76C07C31/08C07C31/12
CPCB01D61/362B01D67/0079B01D69/02B01D69/12B01D71/024B01D71/52B01D71/54B01D71/56B01D71/70C07C29/76C07C31/08C07C31/12
Inventor 伍艳辉唐汪洋吴昊黄翰生
Owner TONGJI UNIV
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