Modified halloysite nanotube/polyether copolyamide mixed matrix membrane and preparation method thereof

A technology of halloysite nanotubes and polyether copolyamide, which is applied in the field of membrane separation, can solve the problems of poor mechanical properties, restricted permeability and selectivity, difficult large-scale preparation, etc., and achieves an increase in contact area and a simple and easy preparation process. Operation, the effect of improving compatibility

Inactive Publication Date: 2021-05-14
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic membranes made of organic materials are cheap and easy to prepare, but their permeability and selectivity will restrict each other; inorganic membranes made of inorganic materials are resistant to corrosion and high temperature, but their mechanical properties are poor, making it difficult to prepare on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]Example 1: Modified Elonan Millet / pebax-0.5 Mixed Matrix Film (Modified Elonan Tube Fill is 0.5 wt%)

[0025]Preparation of surface modified Elonan tubes: Weigh 4G Elotani nanotubes, 1.2 g sodium carbonate and sodium nitrate, put into ceramic crucibles, mix the ceramic crucible into the muffle, heating, heating speed 5 ° C / min, the highest temperature was heated for 1 h, then washed with dilute salt and deionized water, remove soluble salts and impurities, and dried to obtain etched Elonan nanotubes. Using dopamine and polyethyleneimine to modify the etched Elonan nanotube, 4G etch Ellolite nanopubes in the beaker, vacuum 0.5h, add 100ml super pure water, ultrasonic 0.5h, vacuum 0.5 h. 0.3152 g of Tris-HCl buffer, 0.3792 g of dopamine and 1 g of polyethylene imine were added, and the pH was tested after stirring, and the pH was adjusted to 8.5 to 8.5, stirred for 6 h, then centrifuged with the mixture, obtained precipitation dryer Dry 12h to give Elonin nanotubes with surface ...

Embodiment 2

[0028]Example 2: Modified Elonan nanotube / PEBAX-1 mixed matrix membrane (modified Erosse nanotube fill is 1 wt%)

[0029]Preparation of surface modified Elonan tubes: Weigh 4G Elotani nanotubes, 1.2 g sodium carbonate and sodium nitrate, put into ceramic crucibles, mix the ceramic crucible into the muffle, heating, heating speed 5 ° C / min, the highest temperature was heated for 1 h, then washed with dilute salt and deionized water, remove soluble salts and impurities, and dried to obtain etched Elonan nanotubes. Using dopamine and polyethyleneimine to modify the etched Elonan nanotube, 4G etch Ellolite nanopubes in the beaker, vacuum 0.5h, add 100ml super pure water, ultrasonic 0.5h, vacuum 0.5 h. 0.3152 g of Tris-HCl buffer, 0.3792 g of dopamine and 1 g of polyethylene imine were added, and the pH was tested after stirring, and the pH was adjusted to 8.5 to 8.5, stirred for 6 h, then centrifuged with the mixture, obtained precipitation dryer Dry 12h to give Elonin nanotubes with s...

Embodiment 3

[0032]Example 3: Modified Elotani Millet / pebax 1.5 Mixed Matrix Millation (Modified Elonan Tube Fill is 1.5 wt%)

[0033]Preparation of surface modified Elonan tubes: Weigh 4G Elotani nanotubes, 1.2 g sodium carbonate and sodium nitrate, put into ceramic crucibles, mix the ceramic crucible into the muffle, heating, heating speed 5 ° C / min, the highest temperature was heated for 1 h, then washed with dilute salt and deionized water, remove soluble salts and impurities, and dried to obtain etched Elonan nanotubes. Using dopamine and polyethyleneimine to modify the etched Elonan nanotube, 4G etch Ellolite nanopubes in the beaker, vacuum 0.5h, add 100ml super pure water, ultrasonic 0.5h, vacuum 0.5 h. 0.3152 g of Tris-HCl buffer, 0.3792 g of dopamine and 1 g of polyethylene imine were added, and the pH was tested after stirring, and the pH was adjusted to 8.5 to 8.5, stirred for 6 h, then centrifuged with the mixture, obtained precipitation dryer Dry 12h to give Elonin nanotubes with su...

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PUM

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Abstract

The invention discloses a modified halloysite nanotube/polyether copolyamide mixed matrix membrane and a preparation method thereof, which belong to the technical field of membrane separation. The method is characterized in that polyether copolyamide is used as a polymer substrate, and halloysite nanotubes are used as an inorganic filler. The method comprises the following steps of firstly, carrying out surface etching on the halloysite nanotube, and then carrying out surface coating modification on the etched halloysite nanotube, and blending the modified halloysite nanotube with polyether copolyamide to prepare the mixed matrix membrane. The preparation process is simple and easy to operate, and the prepared mixed matrix membrane is applied to CO2/N2 gas separation and has good separation performance.

Description

Technical field[0001]The present invention relates to a modified Elonan nanotube / polyether copolyamide mixed matrix film and a preparation method thereof, belonging to the field of membrane separation.Background technique[0002]CO2It is widely considered to be a main greenhouse gas in a greenhouse effect. In order to achieve CO2Emissions, vigorously develop and use CO2CARBON CAPTURE AND Storage (CCS) technology is one of the solutions with broad prospects. CO2The capture method includes an absorption method, an adsorption method, and a membrane separation method. Among them, the membrane separation method is an emerging separation technology, which has a simple process, a significant advantage of small pollution, has become one of important carbon capture technologies.[0003]The membrane material is a key to determining the separation effect of the mixed gas, including organic materials and inorganic materials. The organic film preparation of organic materials is low and easy to pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D69/14B01D67/00
CPCB01D67/0079B01D69/148B01D71/56
Inventor 赵晴林俊林千果
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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