Polyimide-zinc organic framework loaded graphene oxide hybrid membrane as well as preparation and application

An organic framework and polyimide technology, applied in the field of gas membrane separation, can solve the problems that have not been reported in the literature, and achieve the effects of excellent comprehensive performance, process control, and simple preparation method

Active Publication Date: 2018-04-03
TIANJIN POLYTECHNIC UNIV
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the preparation and application of polyimide-zinc organic framework-supported graphene oxide hybrid membranes have not been reported in the literature.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Graphene oxide was prepared by the Hummer method, diluted with a solution with a mass ratio of methanol and water of 4: 1 to obtain a graphene oxide solution A with a mass concentration of 2%, and ultrasonically dispersed for 5 hours; 0.366g of zinc nitrate hexahydrate and 0.811g of 2 - Methylimidazole was dissolved in 12ml and 20ml of methanol solvent respectively, and after being completely dissolved, the two were mixed. Add 8 ml of the above graphene oxide methanol aqueous solution A to the above mixed solution of zinc nitrate hexahydrate and 2-methylimidazole, and stir and react at room temperature for 3 h. The reaction product was centrifuged and washed with methanol, and dried in a vacuum oven at 40° C. for 24 hours to obtain zinc organic framework-supported graphene oxide composite nanosheets.

[0016] Weigh 0.6g polyimide and 8g N,N-dimethylacetamide and stir at room temperature under 600r / min magnetic stirring for 1h, add 0.03g of zinc organic framework-loaded ...

Embodiment 2

[0019] The preparation method is the same as that in Example 1, except that the mass of the zinc organic framework-supported graphene oxide composite nanosheet is 0.06 g.

[0020] The test conditions are the same as those of Comparative Example 1, with pure gas under dry conditions, CO 2 The permeability is 7.32barrer, CO 2 / N 2 The ideal selectivity is 40.67. Tested with pure gas under humidified conditions, CO 2 Permeability is 84barrer, CO 2 / N 2 The ideal selectivity is 46.

Embodiment 3

[0022] The preparation method is the same as that in Example 1, except that the mass of the zinc organic framework-supported graphene oxide composite nanosheet is 0.09 g.

[0023] The test conditions are the same as those of Comparative Example 1, with pure gas under dry conditions, CO 2 Permeability is 14.5barrer, CO 2 / N 2 The ideal selectivity is 46.77. Tested with pure gas under humidified conditions, CO 2 Permeability is 124barrer, CO 2 / N 2 The separation factor was 49.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Permeabilityaaaaaaaaaa
Selectivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a polyimide-zinc organic framework loaded graphene oxide hybrid membrane. A preparation process comprises the following steps: preparing graphene oxide by adopting a Hummer method, preparing dispersing liquid with a mass ratio of methanol to water of (1 to 4) to 1, and performing ultrasonic dispersion; adding the graphene oxide and the dispersing liquid into a mixed solution of zinc nitrate hexahydrate and 2-methylimidazole, and performing a stirring reaction at room temperature, thus preparing a zinc organic framework loaded graphene oxide compound nanosheet; and blending the zinc organic framework loaded graphene oxide compound nanosheet and a polyimide solution to prepare a membrane casting solution, and preparing the hybrid membrane through a tape casting method. The polyimide-zinc organic framework loaded graphene oxide hybrid membrane disclosed by the invention has the advantages that the raw materials of the hybrid membrane are easy to obtain, and the preparation process is simple and controllable; and the prepared compound membrane is used for gas separation, and has excellent separation performance. Particularly, under a humidification condition, the permeability of CO2 pure gas is 238 barrer, and the CO2 / N2 selectivity is 65.

Description

technical field [0001] The invention relates to a polyimide-zinc organic framework loaded graphene oxide hybrid membrane and its preparation and application, belonging to the technical field of gas membrane separation. Background technique [0002] CO 2 As a major greenhouse gas, its emission reduction has received extensive attention from all over the world. CO 2 Excessive emissions will bring serious negative effects on the environment and climate of our country and the world, so CO 2 The capture and recycling of waste is imminent. The gas membrane separation method has the advantages of low energy consumption, no phase change, easy operation, simple and portable equipment, easy scale-up production and high operational reliability. At present, due to the low separation performance of membrane materials, its further development is limited. Traditional polymer materials have good film-forming properties and low cost, and are the main body of film materials. However, tr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D71/64B01D67/00B01D53/22C01B32/50
CPCB01D53/228B01D67/0079B01D71/64Y02C20/40Y02P20/151
Inventor 辛清萍张玉忠黄丹丹李泓王少飞林立刚
Owner TIANJIN POLYTECHNIC UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap