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Porous material-polymer gas separation composite membrane

A porous material and gas separation technology, applied in the direction of semi-permeable membrane separation, membrane technology, chemical instruments and methods, etc., can solve problems such as poor mechanical properties, and achieve the goal of overcoming poor mechanical properties, high gas separation performance, and high mechanical strength Effect

Inactive Publication Date: 2014-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Poor mechanical properties are a key issue limiting the industrial application of hybrid membranes

Method used

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  • Porous material-polymer gas separation composite membrane
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  • Porous material-polymer gas separation composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Cu 3 (BTC) 2 -Polysulfone gas separation composite membrane

[0017] (1) Cu 3 (BTC) 2 Solution preparation: 0.3g Cu 3 (BTC) 2 After activation, it is uniformly dispersed in chloroform organic solvent; (2) Preparation of polymer solution: polysulfone is dissolved in chloroform organic solvent after drying and pretreatment, and the solid content of the solution is 8wt%; (3) Preparation of casting solution: 17g polysulfone polymer solution was added in batches to Cu 3 (BTC) 2 solution, remove the excess solvent, and finally obtain Cu with a solid content of 10wt%. 3 (BTC) 2 - Polysulfone casting solution; (4) Cu 3 (BTC) 2 -Preparation of polysulfone gas separation composite membrane: After filtering and defoaming the casting solution, it is scraped on the porous polytetrafluoroethylene base membrane, and the solvent is volatilized to obtain Cu 3 (BTC) 2 - Polysulfone gas separation composite membrane.

[0018] Cu in this example 3 (BTC) 2 It is a ...

Embodiment 2

[0019] Example 2: Cu 3 (BTC) 2 -Polysulfone gas separation composite membrane

[0020] (1) Cu 3 (BTC) 2 Solution preparation: 0.9g Cu 3 (BTC) 2 After activation, it is uniformly dispersed in chloroform organic solvent; (2) Preparation of polymer solution: polysulfone is dissolved in chloroform organic solvent after drying and pretreatment, and the solid content of the solution is 10wt%; (3) Preparation of casting solution: 27g polysulfone polymer solution was added in batches to Cu 3 (BTC) 2 solution, remove the excess solvent, and finally obtain Cu with a solid content of 10wt%. 3 (BTC) 2 - Polysulfone casting solution; (4) Cu 3 (BTC) 2 -Preparation of polysulfone gas separation composite membrane: After filtering and defoaming the casting solution, it is scraped on the porous polytetrafluoroethylene base membrane, and the solvent is volatilized to obtain Cu 3 (BTC) 2 - Polysulfone gas separation composite membrane.

[0021] Cu in this example 3 (BTC) 2 - Cu in...

Embodiment 3

[0028] Example 3: Cu 3 (BTC) 2 -Ultem gas separation composite membrane

[0029] (1) Cu 3 (BTC) 2 Solution preparation: 0.3g Cu 3 (BTC) 2 After activation, it is uniformly dispersed in chloroform organic solvent; (2) Preparation of polymer solution: Ultem is dissolved in chloroform organic solvent after drying and pretreatment, and the solid content of the solution is 10wt%; (3) Preparation of casting solution: 27g The Ultem polymer solution was added batchwise to Cu3 (BTC) 2 solution, remove the excess solvent, and finally obtain Cu with a solid content of 10wt%. 3 (BTC) 2 -Ultem casting solution; (4) Cu 3 (BTC) 2 -Preparation of Ultem gas separation composite membrane: After filtering and degassing, the casting solution is scraped and coated on the porous PTFE-based membrane, and the solvent is volatilized to obtain Cu 3 (BTC) 2 -Ultem gas separation composite membrane.

[0030] Ultem in this example is a commercial polyimide material.

[0031] Cu in this exampl...

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Abstract

The invention belongs to the technical field of membranes and in particular relates to a porous material-polymer gas separation composite membrane. The composite membrane comprises a separation layer and a supporting layer, wherein a porous material-polymer hybrid membrane is adopted as the separation layer; one of a porous flat plate and a tubular or hollow fiber membrane is adopted as the supporting layer; the porous material of the separation layer is metal-organic frame materials (MOFs) with large specific surface area and high gas adsorption. The MOFs are added into the separation layer so that the gas permeation and selectivity of the membrane are obviously improved; the separation layer and the supporting layer are compounded so that the membrane keeps good mechanical property, and the separation layer is allowed to exist in a compact or asymmetric structure. The composite membrane provided by the invention has high gas separation property, good mechanical property and wide industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of membranes, and in particular relates to a porous material-polymer gas separation composite membrane. Background technique [0002] The industrial application of gas membrane separation technology began in the 1970s, and has been used in gas dehumidification, air separation, and natural gas removal of CO 2 , hydrogen and organic vapor recovery and other fields have a wide range of applications. Organic membrane has become a common membrane material in the field of industrial gas separation because of its excellent mechanical, thermal and chemical stability, low price, and good film-forming properties. However, organic membrane materials are limited by the intrinsic separation performance, and it is difficult to surpass the "Robeson upper bound" in gas separation performance. The organic-inorganic hybrid membrane adds inorganic particles with high gas separation characteristics as a dispersed phase into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/68B01D71/64B01D67/00B01D53/22
Inventor 曹义鸣段翠佳李萌刘丹丹康国栋刘健辉袁权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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