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Nonionic surfactant gel and gas separating membrane and preparation method thereof

A non-ionic surface and gas separation membrane technology, which is applied in the field of membrane separation, can solve the problems of increasing selectivity and permeation flux, and achieve high gas permeability and separation selectivity, high efficiency, and good mechanical strength.

Active Publication Date: 2012-06-13
WUXI UNMIXED CLEANSE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is an upper limit between the gas selectivity and permeability of polymer dense membrane materials - the Robeson upper limit, which is manifested in the contradiction between the membrane material's gas selectivity and the improvement of permeation flux, which limits the separation of polymer gases to a certain extent Membrane in CO 2 Application in Separation Technology

Method used

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  • Nonionic surfactant gel and gas separating membrane and preparation method thereof
  • Nonionic surfactant gel and gas separating membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: A kind of preparation method of nonionic surfactant gel gas separation membrane adopts the following process steps, and its component ratio is calculated in parts by weight:

[0018] (1) Preparation of film-making solution: 10 parts of poly(ethylene-vinyl acetate), 20 parts of Tween 20 and 70 parts of tetrahydrofuran were stirred and mixed for 3 hours at 20°C, and the stirring speed was 300 rpm to obtain Uniform and transparent film-making liquid;

[0019] (2) Scrape the film-making solution on a glass plate with a stainless steel scraper to obtain a liquid film with a thickness of 500 μm. The temperature of the scrape coating is 20° C., and the liquid film is air-dried at room temperature for 48 hours to obtain the non-ionic surface. Active agent gel gas separation membrane. The thickness of the nonionic surfactant gel gas separation membrane is 300 μm.

[0020] The gel gas separation membrane that embodiment one obtains is put into permeation cell, und...

Embodiment 2

[0026] Embodiment two: a kind of preparation method of nonionic surfactant gel gas separation membrane adopts following process steps, and its component ratio is calculated by weight parts:

[0027] (1) Preparation of film-making solution: 20 parts of polymethyl methacrylate, 10 parts of Tween 80 and 70 parts of acetone were stirred and mixed for 6 hours at 30°C, and the stirring speed was 50 rpm to obtain a uniform and transparent film-making solution;

[0028] (2) Scrape the film-making solution on a glass plate with a stainless steel scraper to obtain a liquid film with a thickness of 200 μm. The temperature of the scrape coating is 50° C., and the liquid film is air-dried at room temperature for 48 hours to obtain the non-ionic surface. Active agent gel gas separation membrane. The thickness of the nonionic surfactant gel gas separation membrane is 100 μm.

[0029] The permeability of the gel gas separation membrane obtained in Example 2 to carbon dioxide is 225 barrer, ...

Embodiment 3

[0030] Embodiment three: a kind of preparation method of nonionic surfactant gel gas separation membrane adopts the following process steps, and its component ratio is calculated by weight parts:

[0031] (1) Preparation of film-making solution: 20 parts of polymethylacrylate, 20 parts of Span 20 and 60 parts of ethyl acetate were mixed at 40°C for 6 hours, and the stirring speed was 300 rpm to obtain a uniform and transparent film-making solution;

[0032] (2) Scrape the film-making solution on a glass plate with a stainless steel scraper to obtain a liquid film with a thickness of 300 μm. The scraping temperature is 50° C., and the liquid film is air-dried at room temperature for 48 hours to obtain the non-ionic surface. Active agent gel gas separation membrane. The thickness of the nonionic surfactant gel gas separation membrane is 200 μm.

[0033] The permeability of the gel gas separation membrane obtained in Example 3 to carbon dioxide is 347 barrer, and the selectivit...

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Abstract

The invention relates to a nonionic surfactant gel and gas separating membrane and a preparation method thereof; the preparation method comprises the following technique steps, wherein the proportions of the ingredients are counted in parts by weight: (1) preparing suspension: stirring and blending 10-20 parts of polymer, 10-20 parts of nonionic surfactant and 60-80 parts of solvent for 3-6 h at a temperature of 20-60 DEG C and a stirring speed of 50-300 rpm to obtain uniform and transparent suspension; (2) scrapping the suspension on a glass plate through a stainless steel scrapping knife ata temperature of 20-50 DEG C to obtain liquid membrane with a thickness of 200-500 mum, and drying the liquid membrane in the air for 24-48 h to obtain the nonionic surfactant gel and gas separating membrane. The nonionic surfactant gel and gas separating membrane of the invention is formed with a gel-shaped structure by the polymer and the nonionic surfactant to obtain high gas permeability and separation selectivity and to obtain a good mechanical strength, so that the nonionic surfactant gel and gas separating membrane has an extensive industrial application prospect.

Description

technical field [0001] The invention relates to a nonionic surfactant gel gas separation membrane and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] In recent years, with the increasing awareness of environmental protection, the separation and recovery of carbon dioxide, a greenhouse gas, has become a focus of widespread concern. As the main source of carbon dioxide emissions, the separation and recovery of carbon dioxide from fossil fuel combustion tail gas has received special attention. At present, the methods used for carbon dioxide separation mainly include physical absorption method, physical adsorption method, chemical absorption method, low temperature condensation method and gas membrane separation method. Among them, gas membrane separation technology is a high-tech successfully developed in the 1980s, and its research and development has become a hot spot in the high-tech field of countries all ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D67/00B01D53/22
Inventor 白云翔张春芳顾瑾孙余凭赖傲楠
Owner WUXI UNMIXED CLEANSE EQUIP
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