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Multilayer gas separation composite membrane and preparation method thereof

A technology of gas separation and composite membrane, which is applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc. It can solve the problems of pore seepage and hard-to-separate cortex, so as to improve permeation flux, have good industrialization prospects, and suppress pore The effect of seepage

Inactive Publication Date: 2015-10-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the bottom membrane is a porous membrane, it is prone to pore seepage, and it is difficult to form a defect-free separation skin on the surface of the membrane.

Method used

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  • Multilayer gas separation composite membrane and preparation method thereof
  • Multilayer gas separation composite membrane and preparation method thereof
  • Multilayer gas separation composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Prepare Pebax1074 (Pebax1074, model: 1074, French Arkema Company) n-butanol solution, heated and stirred to obtain a uniform transparent solution. After standing for defoaming, the coating liquid was coated on the surface of the polysulfone porous membrane by combining dip coating and wet coating, and the PSF / Pebax1074 composite membrane was obtained after desolventization. The separation performance of the membrane was tested, and the experimental results are listed in Table 1.

[0048] The experimental result of table 1 embodiment 1

[0049]

Embodiment 2

[0051] Prepare Pebax1074 n-butanol solutions with 1% and 3% mass concentrations respectively, and heat and stir to obtain a homogeneous transparent solution. After standing for defoaming, dip coating was used to coat the PDMS surface of composite membrane PSF / PDMS with coating liquid, and PSF / PDMS / Pebax1074 composite membrane was obtained after solvent removal. The separation performance of the membrane was tested, and the experimental results are listed in Table 2.

[0052] The experimental result of table 2 embodiment 2

[0053]

Embodiment 3

[0055] Prepare a Pebax1074 n-butanol solution with a mass concentration of 1%, heat and stir evenly, add different masses of GTA, and continue heating and stirring to obtain Pebax1074-GTA coating solutions with different mass ratio concentrations. After static defoaming, the PDMS surface of the PSF / PDMS composite membrane was coated by dip coating method, and the PSF / PDMS / Pebax1074-GTA multilayer composite membrane was obtained after the solvent was removed. The separation performance of the membrane was tested, and the experimental results are listed in Table 3.

[0056] The experimental result of table 3 embodiment 3

[0057]

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Abstract

The invention aims to improve the gas separation performance of a membrane material by means of blending modification to the membrane material and particularly provides a multilayer gas separation composite membrane having an ultrathin separation layer and a preparation method thereof. The membrane is mainly used for separating acidic gases, such as CO2 and the like. In the invention, the multilayer gas separation composite membrane is prepared with a block polymer Pebax and glycerol triacetate as the main material of a separation layer. The preparation method is simple and is easy to achieve large-scale production.

Description

technical field [0001] The invention relates to a gas separation composite membrane, and particularly provides a polyether-b-polyamide and triacetin multilayer gas separation composite membrane and a preparation method thereof. Background technique [0002] CO 2 Recycling has become the focus of global attention. Recently developed CO 2 Capture and storage technology is an integral part of the widely recognized investment program for reducing greenhouse gas emissions. of which CO 2 The capture accounts for the largest energy consumption and is the bottleneck of the development of this technology. [0003] Gas separation membrane is a new technology developed in recent years. It separates different gases according to the difference in the permeation rate of the membrane, and is widely used in air separation, CO 2 Removal, gas dehumidification and hydrogen recovery and other fields. Membrane materials with excellent performance are the key to the development of gas memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/80B01D71/68B01D71/06B01D67/00B01D53/22
Inventor 王颖任吉中李晖邓麦村冯世超赵丹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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