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Sulfonated polyetheretherketone/sulfonated chromium organic framework hybrid membrane, as well as preparation and applications thereof

A technology of sulfonated polyether ether ketone and organic skeleton, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. CO2 permeability, the effect of improving solubility selectivity

Inactive Publication Date: 2014-06-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no literature report on the use of sulfonated polyether ether ketone / sulfonated chromium organic framework hybrid membranes for gas separation

Method used

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  • Sulfonated polyetheretherketone/sulfonated chromium organic framework hybrid membrane, as well as preparation and applications thereof
  • Sulfonated polyetheretherketone/sulfonated chromium organic framework hybrid membrane, as well as preparation and applications thereof
  • Sulfonated polyetheretherketone/sulfonated chromium organic framework hybrid membrane, as well as preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A chromium sulfonated organic framework with a particle diameter of about 500 nanometers was prepared. The process is as follows: Add 4.0 g of chromium nitrate nonahydrate and 1.64 g of terephthalic acid into 48 mL of deionized water and add 0.2 ml of hydrofluoric acid with a mass fraction of 40%. After stirring for 30 min, the mixed solution is transferred to the reaction kettle, and put Put it into a drying oven at 220°C for constant temperature reaction for 8 hours. After the reaction, let the reaction kettle stand and cool down to room temperature. The sample was washed with nitrogen, nitrogen-dimethylformamide at 100°C to remove the incompletely reacted terephthalic acid, and then used Ethanol was exchanged at 78°C to remove residual nitrogen in the crystals, and nitrogen-dimethylformamide was placed in a drying oven at a constant temperature of 150°C for 24 hours to obtain a green chromium organic framework material. Take 1.0 g of the green chromium organic framew...

Embodiment 2

[0021] Weigh 0.6 g of sulfonated polyether ether ketone and 8 g of nitrogen, nitrogen-dimethylacetamide and stir at room temperature for 12 h under magnetic stirring at 500 r / min to completely dissolve the sulfonated polyether ether ketone. Add 0.06 g of the sulfonated chromium organic framework material obtained according to the method of Example 1, add 4 g of nitrogen, nitrogen-dimethylacetamide, and sonicate for 12 h, and add it to the above-mentioned sulfonated polyetheretherketone solution. After 24 h, Stop stirring, filter with copper mesh, let it stand for 1 h to defoam, pour it into a clean glass petri dish (Φ100 mm), put it in an oven, and dry it at 60 °C and 80 °C for 12 h to obtain a thickness of 65 μm. Homogenous film. Pure CO at room temperature, 1.5 bar 2 and pure N 2 Penetration performance testing where CO 2 The permeability coefficient is 19 barrer (1 barrer=10 -10 cm 3 (STP) cm / (cm 2 s cmHg)), CO 2 / N 2 The ideal selectivity is 35.51.

Embodiment 3

[0023] Weigh 0.6 g of sulfonated polyether ether ketone and 8 g of nitrogen, nitrogen-dimethylacetamide and stir at room temperature for 12 h under magnetic stirring at 500 r / min to completely dissolve the sulfonated polyether ether ketone. Add 0.09 g of the sulfonated chromium organic framework material prepared according to the method of Example 1, add 4 g of nitrogen, nitrogen-dimethylacetamide, ultrasonicate for 12 h, and add it to the above-mentioned sulfonated polyetheretherketone solution for 24 h Then stop stirring, filter with copper mesh, let it stand for 1 h to defoam, pour it into a clean glass petri dish (Φ100 mm), put it in an oven, and dry it at 60 °C and 80 °C for 12 h respectively to obtain a thickness of 68 μm homogeneous film. Pure CO at room temperature, 1.5 bar 2 and pure N2 Penetration performance testing where CO 2 The permeability coefficient is 21 barrer (1 barrer=10 -10 cm 3 (STP) cm / (cm 2 s cmHg)), CO 2 / N 2 The ideal selectivity is 38.

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Abstract

The invention discloses a sulfonated polyetheretherketone / sulfonated chromium organic framework hybrid membrane, as well as preparation and applications thereof. The hybrid membrane is composed of sulfonated polyetheretherketone and a sulfonated chromium metal organic framework. The preparation of the hybrid membrane comprises the following steps: reacting Cr(NO3)3.9H2O, terephthalic acid and hydrofluoric acid in water to obtain a chromium organic framework material; modifying by trifluoromethanesulfonic anhydride and concentrated sulfuric acid to obtain a sulfonated chromium organic framework material; mixing the sulfonated chromium organic framework material with a sulfonated polyetheretherketone solution to obtain a membrane casting solution, thereby preparing the hybrid membrane by tape casting. The hybrid membrane and the preparation of the hybrid membrane have the following advantages: raw materials are easy to obtain, the preparation process is simple and controllable, and the prepared sulfonated polyetheretherketone / sulfonated chromium organic framework hybrid membrane is applicable to CO2 / N2 gas separation and has high selectivity and high permeability.

Description

technical field [0001] The invention relates to a sulfonated polyether ether ketone / sulfonated chromium organic framework hybrid membrane and its preparation and application, belonging to the technical field of gas separation membranes. Background technique [0002] The organic-inorganic hybrid membrane refers to the introduction of inorganic components into the polymer matrix, so that the hybrid membrane can have both the toughness of the organic membrane and the high temperature resistance of the inorganic membrane, and can also improve the gas permeability and separation performance of the membrane. The compatibility between polymers and inorganic particles has a great influence on the separation performance of hybrid membranes. To a certain extent, increasing the content of inorganic particles is conducive to the improvement of the performance of polymers, but with the increase of inorganic components As the content increases, the tendency of particle agglomeration also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/72B01D67/00B01D53/22
CPCB01D69/148B01D71/82Y02C20/40B01D71/5222
Inventor 吴洪辛清萍姜忠义
Owner TIANJIN UNIV
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