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one for separating co 2 /n 2 The preparation method of the organic silicon film

An organosilicon, organosilicon source technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve few problems such as microstructure and membrane performance of organosilicon membranes

Active Publication Date: 2022-08-02
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since existing organosilicon films usually use only one bridged organosilicon precursor, few studies have focused on the relationship between the microstructure of organosilicon films and the film performance

Method used

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  • one for separating co <sub>2</sub> /n <sub>2</sub> The preparation method of the organic silicon film
  • one for separating co <sub>2</sub> /n <sub>2</sub> The preparation method of the organic silicon film
  • one for separating co <sub>2</sub> /n <sub>2</sub> The preparation method of the organic silicon film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of BTESE sol: Weigh 1g of BTESE and disperse it in anhydrous ethanol, add 12.1831g of water and 0.0010g of HCl under continuous stirring, and stir continuously at 50°C for 2h in a closed bottle to obtain a silicone membrane. The molar composition of the sol is BTESE:H 2 O:HCl=1:240:0.01, the mass fraction of the organosilicon precursor relative to the sol is 5wt%;

[0027] Preparation of BTESEthy sol: Weigh 1 g of BTESEthy and disperse it in anhydrous ethanol, add 12.2522 g of water and 0.0010 g of HCl under continuous stirring, and continuously stir in a closed bottle at 50 °C for 2 hours to obtain a silicone membrane. The molar composition of the sol is BTESEthy:H 2 O:HCl=1:240:0.01, the mass fraction of the organosilicon precursor relative to the sol is 5wt%;

[0028] Preparation of BTESA sol: Weigh 1g of BTESA and disperse it in absolute ethanol, add 12.3221g of water and 0.0010g of HCl under continuous stirring, and stir continuously at 50°C for 2h in...

Embodiment 2

[0031] Compared with Example 1, the difference is: the molar composition of the reactants is precursor / H 2 O / HCl=1:60:0.01.

Embodiment 3

[0033] Compared with Example 1, the difference is: the molar composition of the reactants is precursor / H 2 O / HCl=1:180:0.01.

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Abstract

The invention belongs to the field of membrane material preparation, in particular to a method for separating CO 2 / N 2 The preparation method of the organic silicon film. With 1,2-bis(triethoxysilyl)ethane (BTESE), 1,2-bis(triethoxysilyl)ethylene (BTESEthy) or 1,2-bis(triethoxysilyl) ) acetylene (BTESA) as the organosilicon source precursor, and organosilicon films with different bridging groups were prepared by a sol-gel method. The microstructure and separation performance of the silicone membranes were investigated in detail by using ethane, ethylene, or acetylene bridges with similar bond lengths. The experimental results show that the introduction of a rigid acetylene bridge makes the microstructure of the film more loose. BTESA membrane has a more open and accessible pore structure suitable for CO 2 / N 2 separation.

Description

technical field [0001] The invention belongs to the field of membrane material preparation, in particular to a method for separating CO 2 / N 2 The preparation method of the organic silicon film. Background technique [0002] Excessive emission of carbon dioxide has caused a series of environmental problems, which has attracted high public attention. Compared with traditional separation processes, membrane separation technology offers a promising approach to achieve efficient and energy-efficient carbon dioxide capture, and various membranes including organic, inorganic, and organic-inorganic hybrid types have been widely used. Carbon dioxide separation. Among them, organosilicon membranes with high hydrothermal stability and excellent molecular sieving properties have attracted great interest and have shown great application prospects in the separation of carbon dioxide. [0003] Since existing organosilicon films typically use only one bridged organosilicon precursor, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/70B01D53/22B01D67/00B01D69/10
CPCB01D71/70B01D69/10B01D67/0079B01D53/228Y02C20/40
Inventor 郭猛钱俊明钟璟黄维秋徐荣任秀秀吴楠桦
Owner CHANGZHOU UNIV