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Novel polyether copolyamide gel membrane and preparation method thereof

A technology of polyether copolyamide gel membrane and polyether copolyamide, applied in the field of new polyether copolyamide gel membrane and its preparation, and membrane separation, can solve the toxicity of ionic liquid, limit industrial application, unfavorable practical application, etc. problems, to achieve the effects of non-toxic volatilization, high gas permeability and separation selectivity, and excellent mechanical properties

Inactive Publication Date: 2014-02-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disclosed in Chinese patent CN102489182A is a kind of nonionic surfactant gel gas separation membrane and its preparation method. Gel membrane with high volume and separation factor, but the mechanical properties of the membrane are poor, which is not conducive to practical application
Several ionic liquid gel membranes and their preparation methods are disclosed in Chinese patents CN102512975A and CN102489174A. Due to the toxicity, high price and complex synthesis process of ionic liquids, the industrial application is greatly limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing a novel polyether copolyamide gel film includes the following steps, and the formula ratio is based on parts by weight:

[0017] (1) Preparation of membrane-making solution: Weigh 10 parts of polyether copolyamide (wherein the weight ratio of polytetrahydrofuran segment to nylon 12 segment is 4:1), 70 parts of n-butanol and 20 parts of Tween 20 After stirring and mixing at 80°C for 5 hours, a uniform and transparent solution was obtained.

[0018] (2) Leave the film-making liquid to stand for 10 minutes, then apply it to a polytetrafluoroethylene plate, dry it in air at room temperature for 48 hours, and then put it in a vacuum drying oven for 12 hours to obtain the product polyether copolyamide gel membrane.

[0019] Under the conditions of 25℃ and 0.6MPa, the permeability coefficient of the membrane to pure gas is measured as: P co2 =289Barrer, PN2=13Barrer, CO 2 / N 2 The theoretical selectivity is 22.23.

Embodiment 2

[0021] A method for preparing a novel polyether copolyamide gel film includes the following steps, and the formula ratio is based on parts by weight:

[0022] (1) Preparation of membrane-making solution: Weigh 20 parts of polyether copolyamide (wherein the weight ratio of polytetrahydrofuran segment to nylon 12 segment is 1:3), 60 parts of n-butanol and 20 parts of Triton X-114 After stirring and mixing for 4 hours at 100°C, a uniform and transparent solution was obtained.

[0023] (2) Leave the film-making solution to degas for 20 minutes, then apply it to a polytetrafluoroethylene plate, dry it in the air at room temperature for 24 hours, and then put it in a vacuum drying oven for 15 hours to obtain the product polyether copolyamide gel membrane.

[0024] Under the condition of 30℃ and 0.5MPa, the permeability coefficient of the membrane to pure gas is measured as: P co2 =195Barrer, P H2 =19Barrer, CO 2 / H 2 The theoretical selectivity is 10.26.

Embodiment 3

[0026] A method for preparing a novel polyether copolyamide gel film includes the following steps, and the formula ratio is based on parts by weight:

[0027] (1) Preparation of membrane-making solution: weigh 15 parts of polyether copolyamide (wherein the weight ratio of polytetrahydrofuran segment to nylon 12 segment is 7:3), 75 parts of n-butanol: n-propanol=3:1 After stirring and mixing the mixed solution and 10 parts of polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer at 70°C for 3 hours, a uniform and transparent solution was obtained.

[0028] (2) Leave the film-making solution to stand for 30 minutes to defoam, and then apply it to a polytetrafluoroethylene board, dry it in air at room temperature for 24 hours, and then put it in a vacuum drying oven for 24 hours to obtain the product polyether copolyamide gel membrane.

[0029] Under the condition of 30℃ and 1.0MPa, the permeability coefficient of the membrane to pure gas is measured as: P co2...

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Abstract

The invention relates to a preparation method of a novel polyether copolyamide gel membrane, belonging to the field of membrane separation technologies. The preparation method of the gel membrane comprises the following steps of mixing and stirring polyether copolyamide, surfactant and solvent at a certain temperature so as to obtain casting film liquor, coating the casting film liquor on a teflon plate, standing in air for a while, then drying in a vacuum drying oven for several hours, and obtaining the polyether copolyamide gel membrane. The polyether copolyamide gel membrane prepared by the method not only has excellent tensile strength and elongation at break, but also has high permeation flux and separation factor, and is especially suitable for separation of carbon dioxide and hydrogen and recycling of organic steam such as benzene and methane.

Description

Technical field [0001] The invention relates to a novel polyether copolyamide gel membrane and a preparation method thereof, belonging to the field of membrane separation technology and high-tech. Background technique [0002] Membrane separation technology is a high and new technology adapted to the development of contemporary new industries. It is recognized as one of the most promising high technologies from the end of the 20th century to the middle of the 21st century. In recent years, it has been used in food, medicine and health, petrochemical industry, biotechnology, and environmental protection. Applications in engineering and other fields are becoming more and more extensive. Gas membrane separation does not require a phase change process and can be carried out at room temperature, so it has the advantages of simple operation and low energy consumption. Since pressure is the driving force of the separation process, it is especially suitable for the separation and recover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D67/00
Inventor 白云翔张瑶瑶张春芳顾瑾孙余凭
Owner JIANGNAN UNIV
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