Gas separation film based on carbon nanotube/graphene oxide-polyether block amide

A polyether block amide and gas separation membrane technology, applied in the field of membrane separation, can solve problems such as unfavorable gas separation performance, graphene oxide is easy to wrinkle, etc., and achieves the effects of high gas permeability coefficient and separation coefficient, and good thermal stability.

Inactive Publication Date: 2016-11-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
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Problems solved by technology

However, in the polymer matrix, carbon nanotubes are easy to agglomerate and graphene oxide is easy to wrinkle, which is not conducive to the further improvement of gas separation performance.

Method used

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  • Gas separation film based on carbon nanotube/graphene oxide-polyether block amide
  • Gas separation film based on carbon nanotube/graphene oxide-polyether block amide

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Embodiment 1

[0017] Embodiment 1, disperse 300 milligrams of oxidized carbon nanotubes in 80 milliliters of concentrated sulfuric acid with a concentration of 16mol / L, after stirring evenly, add 8 milliliters of phosphoric acid, and stir for 20 minutes; 1 gram of potassium permanganate is added to step (1 ) in the mixed solution described in ), stirred for 1 hour, then stirred at 60 ° C for 2 hours; dissolved in (2) was added to 100 ml of ice containing 5% hydrogen peroxide, and after standing for 24 hours, remove the above clear liquid; the solution in (3) is cleaned with 30% hydrochloric acid, then the product is dissolved in 60 milliliters of 30% hydrochloric acid, and after standing for 12 hours, it is cleaned to neutral by suction filtration to obtain carbon nanotube / graphene oxide; A certain amount of carbon nanotubes / graphene oxide prepared in a certain amount of steps (1)-(4) is ultrasonically dispersed in a mixed solution of ethanol and water (mass ratio 7:3), to obtain a uniform d...

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Abstract

The invention belongs to the field of film separation technique, and particularly relates to a gas separation film based on carbon nanotube / graphene oxide-polyether block amide. A preparation method of the gas separation film comprises the following steps of obtaining a carbon nanotube / graphene oxide novel nanometer carbon structure by a chemical oxidation method, and enabling a certain amount of carbon nanotube / graphene oxide to be dispersed ultrasonically in a mixed solution of ethanol and water (in a mass ratio of the ethanol to the water being 7 to 3) so as to obtain uniform dispersion fluid A; then dissolving a certain amount of polyether block amide into a solution of ethanol and water, with the same amount as the mixed solution of the ethanol and the water, and performing stirring until the polyether block amide is completely dissolved so as to obtain dispersion fluid B; and mixing the dispersion fluid A with the dispersion fluid B, allowing the mixed dispersion fluid to stand for deaeration, pouring the mixed dispersion fluid after deaeration into a culture dish, and performing drying and film forming so as to obtain the gas separation film based on the carbon nanotube / graphene oxide-polyether block amide. Compared with polyether block amide separation films, the gas separation film based on the carbon nanotube / graphene oxide-polyether block amide provided by the invention has better heat stability, higher gas permeation coefficients and higher separation coefficients, and has important application prospects in the field of gas separation films.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a gas separation membrane based on carbon nanotube / graphene oxide-polyether block amide and a preparation method thereof. Background technique [0002] Polymer membranes are widely used in the field of gas separation due to their good mechanical properties and high thermal stability. However, the Robertson upper limit generally exists in polymer gas separation membranes, which seriously affects the joint improvement of gas permeability coefficient and separation coefficient, and reduces the application value of polymer gas separation membranes. [0003] In order to improve the permeability coefficient and separation coefficient of polymer membranes at the same time, researchers combined nanomaterials, such as nano-titanium dioxide, nano-silicon dioxide, and metal-organic framework materials, with polymers to prepare polymer composites with excellent gas se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D67/00B01D53/22C08J5/18
CPCB01D53/228B01D67/0079B01D71/56C08J5/18C08J2377/00
Inventor 薛庆忠潘兴龙张建强李小芳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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