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A Polyethylene Glycol Functionalized Montmorillonite/Polyether Copolyamide Mixed Matrix Membrane for Gas Separation

A polyether copolyamide and mixed matrix membrane technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problems of reducing gas separation performance, restricting gas separation, etc., achieving excellent mechanical properties, small loss, Good film forming effect

Active Publication Date: 2017-06-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been many reports on the preparation of organic-inorganic blend films by adding inorganic particles to polymers, such as SiO 2 , metal oxide, clay, zeolite, carbon molecular sieve, carbon nanotube (CNT), MOF, etc., but because the inorganic particles are embodied, they are fixed in the polymer matrix and cannot move. Its effect on the gas is only when the gas reaches its vicinity This phenomenon is more obvious when the addition amount is low, which restricts the further improvement of the gas separation of this type of membrane
At the same time, due to the interface defects between the inorganic particles and the polymer, the prepared mixed matrix membrane often has unselected pores, which reduces its gas separation performance.

Method used

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  • A Polyethylene Glycol Functionalized Montmorillonite/Polyether Copolyamide Mixed Matrix Membrane for Gas Separation
  • A Polyethylene Glycol Functionalized Montmorillonite/Polyether Copolyamide Mixed Matrix Membrane for Gas Separation

Examples

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Embodiment 1

[0023] The preparation of polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix film comprises the following steps, and the described formula ratio is by mass percentage:

[0024] (1) Preparation of polyethylene glycol-functionalized montmorillonite: (a) Dissolve 4 parts of montmorillonite and 10 parts of silane coupling agent in 90 parts of toluene, stir and react at 80°C for 6h, then turn to room temperature Stir overnight. The precipitate is filtered, purified in a Soxhlet extractor for 15 hours, and dried in an oven overnight to obtain a light brown product; (b) 4 parts of polyethylene glycol (molecular weight 1000), 1 part of triethylamine and p- 15 parts of nitrophenyl chloroformate were dissolved in 80 parts of dry tetrahydrofuran, and the reaction was stirred at room temperature overnight. Then it was purified by silica gel chromatography and dried in vacuum to obtain a white product; (c) the (a) 4 parts of the product in (b) and 2 parts...

Embodiment 2

[0029] The preparation of polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix film comprises the following steps, and the described formula ratio is by mass percentage:

[0030] (1) Preparation of polyethylene glycol-functionalized montmorillonite: (a) Dissolve 6 parts of montmorillonite and 11 parts of silane coupling agent in 95 parts of toluene, stir and react at 80°C for 6h, then turn to room temperature Stir overnight. The precipitate is filtered, purified in a Soxhlet extractor for 15 hours, and dried in an oven overnight to obtain a light brown product; (b) 8 parts of polyethylene glycol (molecular weight 2000), 2 parts of triethylamine and p- 20 parts of nitrophenyl chloroformate were dissolved in 85 parts of dry tetrahydrofuran, and the reaction was stirred overnight at room temperature. Then it was purified by silica gel chromatography and dried in vacuum to obtain a white product; (c) the (a) 8 parts of the product in (b) and 4 part...

Embodiment 3

[0035] The preparation of polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix film comprises the following steps, and the described formula ratio is by mass percentage:

[0036] (1) Preparation of polyethylene glycol functionalized montmorillonite: (a) Dissolve 8 parts of montmorillonite and 12 parts of silane coupling agent in 94 parts of toluene, stir and react at 80°C for 6h, then turn to room temperature Stir overnight. The precipitate is filtered, purified in a Soxhlet extractor for 15 hours, and dried in an oven overnight to obtain a light brown product; (b) 8 parts of polyethylene glycol (molecular weight 5000), 2 parts of triethylamine and p- Dissolve 18 parts of nitrophenyl chloroformate in 85 parts of dry tetrahydrofuran, and stir and react overnight at room temperature. Then it is purified by silica gel chromatography and dried in vacuum to obtain a white product; (c) combine (a) 8 parts of the product in (b) and 4 parts of the prod...

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Abstract

The invention relates to a polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix membrane used for gas separation, belonging to the technical field of membrane separation. The mixed matrix membrane is characterized in that montmorillonite, polyethylene glycol, a silane coupling agent and polyether copolyamide are used as main raw materials; the silane coupling agent is used for modifying montmorillonite at first; then modified polyethylene glycol is grafted onto the modified montmorillonite; the grafted modified montmorillonite is mixed with polyether copolyamide at a certain temperature under stirring; and knife coating is carried out so as to obtain the polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix membrane with controllable thickness. The polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix membrane prepared in the invention has excellent tensile strength and fracture elongation and high permeation flux and separation factors, and is especially applicable to separation of carbon dioxide in the air.

Description

technical field [0001] The invention relates to a polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix membrane for gas separation, belonging to the field of gas membrane separation membrane preparation. Background technique [0002] In recent years, due to the combustion of fossil fuels, deforestation and other reasons, the CO in the atmosphere 2 The continuous increase of greenhouse gases has led to serious environmental problems such as temperature rise and abnormal climate. Gas membrane separation technology has attracted people's attention because of its advantages of high efficiency and energy saving, simple device, easy operation, low cost and no pollution. 2 Efficient separation from air is an important research topic at present. Currently, for CO 2 The polymer membranes used for gas separation at room temperature are mainly mixed matrix membranes, which combine the characteristics of easy processing of organic polymer membranes an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/80B01D67/00B01D53/22
CPCY02C20/40
Inventor 陈明清董亮亮施冬健
Owner JIANGNAN UNIV
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