Gas separation membrane, preparation method thereof, and membrane type gas separation device

A gas separation membrane and air technology, applied in the field of membrane separation, can solve the problems of lack of permeation channels, unsuitable membrane separation materials, etc., and achieve the effects of accurate stoichiometry, easy control of the number of coating layers, and great significance.

Inactive Publication Date: 2015-04-22
NANJING UNIV OF TECH +1
View PDF3 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene oxide membranes in the Z direction are also considered unsuitable as membrane separation materials due to their dense stacking methods and lack of gas and liquid permeation channels.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gas separation membrane, preparation method thereof, and membrane type gas separation device
  • Gas separation membrane, preparation method thereof, and membrane type gas separation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0033] Aiming at the deficiencies of the prior art, the invention provides a gas separation membrane based on a composite membrane of polymer branched polyethyleneimine and graphene oxide materials and a preparation method thereof. In the invention, the flake graphene oxide material is dispersed in an aqueous solution, and then a single-layer or multi-layer composite membrane is prepared on a porous substrate through a layer-by-layer overlapping coating method with a polymer branched polyethyleneimine solution. The doping between graphene oxide material layers changes and the graphene oxide film is densely stacked in the Z direction, resulting in physical channels for separating gases and functional groups for selective chemical adsorption.

[0034] The gas separation membrane of the present invention includes a porous substrate, on at least one surface...

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

No PUM Login to view more

Abstract

The invention discloses a gas separation membrane and a preparation method thereof and belongs to the technical field of membrane separation. The gas separation membrane comprises a porous substrate, wherein a composite membrane which is prepared by mixing oxidized graphene and polymeric branched polyethyleneimine is attached to at least one surface of the porous substrate. The preparation method of the gas separation membrane disclosed by the invention comprises the following steps: dispersing a flaky oxidized graphene material in an aqueous solution; and then preparing a single-layered or a multi-layered composite membrane on the porous substrate with a polymeric branched polyethyleneimine solution by a coating method of overlaying layer by layer. The invention further discloses a membrane assembly unit, namely a membrane type gas separation device which uses the gas separation membrane. By means of a special molecular transmission characteristic of a layered graphene material, a limiting relationship between the permeability and selectivity in the gas separation membrane is broken and an excellent gas separating performance is exhibited. The method disclosed by the invention is simple and economic in process, wide in application range and suitable for scaled preparation.

Description

technical field [0001] The invention relates to a gas separation membrane and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] Membrane gas separation is widely used in chemical industry, energy, environment, biomedicine and pharmaceutical industry. In energy science, high-purity H 2 and CH 4 It is regarded as the basic material for fuel cells and hydrogen power generation. In environmental science, CO suppression 2 Increase is the main direction to improve the greenhouse effect. The same direct, low-cost, and environmentally friendly extraction of usable gas and oil from waste gas and oil is a new requirement and challenge for the separation technology in the chemical industry. [0003] Compared with traditional refrigerated distillation and pressure swing adsorption separation technologies, membrane separation technology has many advantages such as energy saving, low price, easy installation, operatio...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/10B01D67/00B01D53/22
Inventor 章伟蔡依晨许泳
Owner NANJING UNIV OF TECH
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