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Composite membrane material capable of efficiently separating gas and preparation method of composite membrane material

A technology for separating gases and composite materials, applied in separation methods, semi-permeable membrane separation, and dispersed particle separation, etc., can solve problems such as difficult preparation of film-forming materials and obstacles to the development of gas separation fields, and achieve low raw material costs and high commercial value , the effect of simple operation

Active Publication Date: 2021-04-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CMP itself is insoluble and infusible, and it is difficult to prepare film-forming materials, which greatly hinders its development in the field of gas separation.

Method used

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  • Composite membrane material capable of efficiently separating gas and preparation method of composite membrane material
  • Composite membrane material capable of efficiently separating gas and preparation method of composite membrane material
  • Composite membrane material capable of efficiently separating gas and preparation method of composite membrane material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0046] (1) Dissolve scandium trifluoromethanesulfonate in water to obtain solution A of 0.1mmol / L; mix 1,3,5-tris(4-aminophenyl)benzene (TAPB) and terephthalaldehyde (TP ) was dissolved in ethyl acetate to obtain solution B whose TAPB concentration was 4mmol / L and TP concentration was 6mmol / L. The rest refer to subscripts.

[0047] (2) Immerse the PSU membrane in solution A first, soak for 30 seconds, remove the water droplets on the surface with air, then soak in solution B, keep for 30 seconds; remove and dry the surface droplets, then repeat The above operation is performed 3 times.

[0048] (3) Immerse the membrane material in water for 3 minutes to fully wash, repeat three times; change to ethyl acetate and repeat three times, change to ethanol and repeat three times. Afterwards, the membrane material was dried in an oven at 60°C for 12 hours to obtain a TAPB-TP-CMP@PSU composite membrane material.

[0049]

Embodiment example 2

[0051] (1) Dissolve scandium trifluoromethanesulfonate in water to obtain 0.1mmol / L solution A; dissolve tetrakis(4-aminophenyl)methane (TABM) and terephthalaldehyde (TP) in ethyl acetate , a solution B with a concentration of TABM of 4 mmol / L and a concentration of TP of 8 mmol / L was obtained.

[0052] (2) Immerse the PSU membrane in solution A first, soak for 90 seconds, remove the water droplets on the surface with air, then soak in solution B, and keep for 90 seconds; remove and dry the surface droplets, and then repeat The above operation is performed 4 times.

[0053] (3) Immerse the membrane material in water for 3 minutes to fully wash, repeat three times; change to ethyl acetate and repeat three times, change to ethanol and repeat three times. Afterwards, the membrane material was dried in an oven at 60°C for 12 hours to obtain a TABM-TP-CMP@PSU composite membrane material.

[0054]

[0055] Performance Characterization

[0056] (1) Infrared spectrometer test re...

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Abstract

The invention discloses a composite membrane material capable of efficiently separating gas and a preparation method of the composite membrane material. A composite material CMP-coated Polymer of a conjugated microporous polymer and an organic polymer is prepared in two solutions by using a continuous liquid-phase impregnation method. The method takes an organic polymer as a substrate and comprises the steps of pre-impregnating the organic polymer into a solvent I, then impregnating the organic polymer into a solvent II, and repeating the operation until an effective membrane material is synthesized; and soaking and washing the composite membrane material in water, ethyl acetate and ethanol, repeatedly conducting soaking and washing, and conducting drying, wherein one of the two solutions is prepared from a sulfonate compound and the solvent I, and the other solution is prepared from an aldehyde aromatic compound, an amino aromatic compound and the organic solvent II. The composite membrane material is synthesized by a continuous liquid-phase impregnation method, the method has universality, is simple to operate and low in raw material cost and has large processability, and the gas flux and selectivity of the composite membrane material can be regulated and controlled by controlling the concentration of reactants, the number of continuous impregnation times and the impregnation time.

Description

technical field [0001] The invention belongs to the field of gas separation, in particular to the field of composite membrane gas separation membrane materials. Background technique [0002] Gas separation technology is a technology that uses the differences in the size, boiling point, and interaction with host materials of different gas molecules to achieve gas purification. According to the different separation mechanisms, it can be divided into the following categories: (1) Pressure swing adsorption, which uses the difference in boiling point of different gases to achieve the separation of gas molecules through low-temperature rectification, is currently the most commonly used in industry for separation Gas molecule technology, but this method consumes high energy, expensive equipment, and high maintenance costs; (2) Adsorption separation, which uses the different strengths of interactions between adsorbents and different adsorbates to achieve the separation of gas molecu...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00B01D53/22
CPCB01D69/12B01D67/0002B01D53/228
Inventor 王博冯霄邵鹏鹏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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