Polyethylene glycol functionalized montmorillonite/polyether copolyamide mixed matrix membrane used for gas separation

A technology of polyether copolyamide and mixed matrix membrane, which is applied in separation methods, semipermeable membrane separation, and dispersed particle separation, can solve the problems of reducing gas separation performance and restricting gas separation, and achieves excellent mechanical properties, small loss, and Good film-forming effect

Active Publication Date: 2016-03-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 , metaloxide, clay, zeolite, carbonmolecularsieve, carbonnanotube (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 reflected whe

Method used

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  • Polyethylene glycol functionalized montmorillonite/polyether copolyamide mixed matrix membrane used for gas separation
  • Polyethylene glycol functionalized montmorillonite/polyether copolyamide mixed matrix membrane used for gas separation

Examples

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Example Embodiment

[0022] Example 1

[0023] The preparation of polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix film includes the following steps, and the formula ratio is calculated 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 6 hours, then turn to room temperature Stir overnight. The precipitate was filtered, purified in a Soxhlet extractor for 15 hours, and dried overnight in an oven to obtain a light brown product; (b) 4 parts of polyethylene glycol (molecular weight 1000), 1 part of triethylamine, and 15 parts of nitrophenyl chloroformate were dissolved in 80 parts of dry tetrahydrofuran, and the reaction was stirred overnight at room temperature. Then it was purified by silica gel chromatography column and dried in vacuum to obtain a white product; (c) (a) 4 parts of the midd...

Example Embodiment

[0028] Example 2

[0029] The preparation of polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix film includes the following steps, and the formula ratio is calculated 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 6 hours, then turn to room temperature Stir overnight. The precipitate was 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 20 parts of nitrophenyl chloroformate was dissolved in 85 parts of dry tetrahydrofuran, and the reaction was stirred overnight at room temperature. Then it was purified by a silica gel column and dried in vacuo to obtain a white product; (c) (a) 8 parts of the middle product and...

Example Embodiment

[0034] Example 3

[0035] The preparation of polyethylene glycol functionalized montmorillonite / polyether copolyamide mixed matrix film includes the following steps, and the formula ratio is calculated 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 6 hours, then turn to room temperature Stir overnight. The precipitate was 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 18 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 a silica gel column and dried under vacuum to obtain a white product; (c) (a) 8 parts of the middle produc...

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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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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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