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Hydrogel microsphere-filled hybrid membrane capable of adjusting membrane water content as well as preparation and application thereof

A technology for hydrogel microspheres and hybrid membranes, which is applied in the field of hybrid membranes, can solve the problems of low water absorption of hydrophobic membrane materials, poor mechanical stability, adjustment and improvement of water content in membranes, etc. The effect of good compatibility and good gas separation performance

Inactive Publication Date: 2014-07-02
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the natural gas extracted from oil and gas fields generally contains a lot of water vapor, and the existence of water vapor is usually beneficial to membrane separation of gases. The hydrophilic membrane materials studied at present have poor mechanical stability, and the water absorption capacity of hydrophobic membrane materials Rarely, there is no related technology to adjust and increase the water content in the membrane. Based on this, we choose the hybrid method to fill the hydrogel spheres into the polymer matrix to prepare a hybrid membrane that adjusts the water content in the membrane. At present, this work is still in progress. No report

Method used

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  • Hydrogel microsphere-filled hybrid membrane capable of adjusting membrane water content as well as preparation and application thereof
  • Hydrogel microsphere-filled hybrid membrane capable of adjusting membrane water content as well as preparation and application thereof
  • Hydrogel microsphere-filled hybrid membrane capable of adjusting membrane water content as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.14 g of monomeric N-isopropylacrylamide and 0.09 g of N,N-methylenebisacrylamide, add them to a 250 mL four-neck flask, add 60 mL of deionized water, blow nitrogen and stir mechanically, and heat up to After 30 min at 90°C, 10 mL of aqueous solution containing 0.1 g of potassium persulfate was added, reacted at this temperature for 6 h, the product was centrifuged, washed with deionized water for 3 times to a clear solution, and dried in a vacuum oven for 48 h to obtain the pellet Hydrogel microspheres with a diameter of 250-300 nm. Weigh 0.6 g of polyimide resin (trade name: Matrimid 5218) and dissolve it in 10 g of N,N-dimethylformamide, stir at room temperature for 12 h to completely dissolve the polyimide resin, and set aside. Weigh 0.03 g of hydrogel microspheres and add the above polyimide resin solution with a mass fraction of 6%, stir for 12 h, pour it on a clean glass plate, dry it in an oven at 50 °C for 12 h, and then raise the temperature to 80 °C fo...

Embodiment 2

[0021] The preparation method was the same as in Example 1, except that the filling amount of hydrogel microspheres was changed from 0.03 g to 0.06 g.

[0022] The prepared hybrid membrane was used to separate CO at room temperature and 2 bar 2 30% CO by volume 2 / CH 4 Binary gas mixture, tested under wet conditions, its permeability coefficient is 176 barrer, CO 2 / CH 4 The selectivity is 52.

Embodiment 3

[0024] The preparation method was the same as in Example 1, except that the filling amount of hydrogel microspheres was changed from 0.03 g to 0.09 g.

[0025] The prepared hybrid membrane was used to separate CO at room temperature and 2 bar 2 30% CO by volume 2 / CH 4 Binary gas mixture, tested under wet conditions, its permeability coefficient is 219 barrer, CO 2 / CH 4 The selectivity is 55.

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Abstract

The invention discloses a hydrogel microsphere-filled hybrid membrane capable of adjusting membrane water content as well as preparation and application thereof. The hybrid membrane consists of hydrogel microspheres and polyimide resin. The preparation process of the hybrid membrane comprises the following steps: preparing the hydrogel microspheres; preparing a polyimide resin solution; feeding the hydrogel microspheres into the polyimide resin solution to prepare a casting membrane solution, and preparing the hybrid membrane. The hybrid membrane has the advantages that the preparation process is simple, and the membrane water content can be simply and conveniently adjusted; the prepared hydrogel microsphere-filled hybrid membrane is even in distribution in the membrane; the compatibility between filled particles and a polymer matrix is better; the water absorption of the hybrid membrane is improved and adjusted by the hydrogel microspheres in the hybrid membrane; the prepared hybrid membrane can be used for separating CO2 / CH4, and is better in separating property under the wet testing condition; the CO2 permeability coefficient is 270 barrer, and the CO2 / CH4 separation selectivity is 59.

Description

technical field [0001] The invention relates to a hybrid membrane filled with hydrogel microspheres to adjust the water content in the membrane, its preparation and application, and belongs to the technical field of gas membrane separation. Background technique [0002] Gas membrane separation technology has developed rapidly in recent years due to its advantages of low investment, low energy consumption, low operating cost, simple and compact equipment, easy operation, high production flexibility and high separation efficiency. Organic membranes are difficult to exceed the Robesen upper limit, are not resistant to high temperature and corrosion, and inorganic membrane materials are brittle, difficult to process, poor in film formation, and relatively expensive at present, which restricts their wide application in the field of gas separation. Hybrid membranes combine the advantages of organic membranes and inorganic membranes. It can provide better selectivity and flux, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/64B01D67/00B01D53/22C08F220/54C08F222/38
CPCY02C10/10Y02C20/40Y02P20/151
Inventor 吴洪李雪琴姜忠义王梅迪
Owner TIANJIN UNIV
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