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Preparation method of mixed matrix membrane material

A technology of mixed matrix membrane and mixed liquid, applied in the field of membrane materials, can solve problems such as hindering practical application and poor stability of MOF structure

Inactive Publication Date: 2021-05-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor stability of some MOF structures hinders their practical application

Method used

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  • Preparation method of mixed matrix membrane material
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  • Preparation method of mixed matrix membrane material

Examples

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specific Embodiment 1

[0029] (1) Preparation process: First, accurately weigh 2.4 g of chromium nitrate nonahydrate and add it to a high-pressure reactor with a polytetrafluoroethylene liner, add 30 mL of deionized water, and then accurately weigh 0.99 g of terephthalic acid, benzene Add 2.2g of formic acid into the reaction kettle in turn, stir and sonicate for 30min until it is completely dissolved, seal it with the reaction kettle and place it in an oven at 220°C for 8h, set the program to cool down at the same time, and after 8h, use a cooling rate of 25°C / h Slowly cool the oven temperature to room temperature, collect the solid product by filtration, wash the obtained solid product repeatedly with deionized water-filter 3 times, then put the product in a 30mL glass bottle with a cover, add 20mL of anhydrous methanol, and stir for 15min Finally, tighten the cap of the bottle, let it stand for 8 hours, repeat this process 3 times, filter and collect the dark green precipitate, and place it in a b...

specific Embodiment 2

[0034](1) Preparation process: First, accurately weigh 2.4 g of chromium nitrate nonahydrate and add it to a high-pressure reactor with a polytetrafluoroethylene liner, add 30 mL of deionized water, and then accurately weigh 0.99 g of terephthalic acid, benzene Add 2.2g of formic acid into the reaction kettle in turn, stir and sonicate for 30min until it is completely dissolved, seal it with the reaction kettle and place it in an oven at 220°C for 8h, set the program to cool down at the same time, and after 8h, use a cooling rate of 25°C / h Slowly cool the oven temperature to room temperature, collect the solid product by filtration, wash the obtained solid product repeatedly with deionized water-filter 3 times, then put the product in a 30mL glass bottle with a cover, add 20mL of anhydrous methanol, and stir for 15min Finally, tighten the cap of the bottle, let it stand for 8 hours, repeat this process 3 times, collect the dark green precipitate by filtration, and dry it in a b...

specific Embodiment 3

[0039] (1) Preparation process: First, accurately weigh 2.4 g of chromium nitrate nonahydrate and add it to a high-pressure reactor with a polytetrafluoroethylene liner, add 30 mL of deionized water, and then accurately weigh 0.99 g of terephthalic acid, benzene Add 2.2g of formic acid into the reaction kettle in turn, stir and sonicate for 30min until it is completely dissolved, seal it with the reaction kettle and place it in an oven at 220°C for 8h, set the program to cool down at the same time, and after 8h, use a cooling rate of 25°C / h Slowly cool the oven temperature to room temperature, collect the solid product by filtration, wash the obtained solid product repeatedly with deionized water-filter 3 times, then put the product in a 30mL glass bottle with a cover, add 20mL of anhydrous methanol, and stir for 15min Finally, tighten the cap of the bottle, let it stand for 8 hours, repeat this process 3 times, collect the dark green precipitate by filtration, and dry it in a ...

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Abstract

The invention discloses a preparation method of a mixed matrix membrane material, and belongs to the technical field of membrane materials. Porous MIL-101 (Cr) particles with the particle size of 200-300 nm are prepared by adopting a solvothermal synthesis method, different amounts of MIL-101 are uniformly dispersed in an MOF dispersion liquid by adopting a stirring-ultrasonic treatment method, the formed solution is added into an ethanol / water solution of high polymer polyether block amide, a series of mixed matrix membranes with different composition proportions are obtained by adopting a natural tape casting method. The method comprises the following steps: preparing the MIL-101 (Cr), preparing the MIL-101-coated Pebax membrane and the like. A permeability comparison diagram shows that MIL-101-coated Pebax mixed matrix membranes with different composition proportions have certain permeability selectivity to ethylbenzene / N2, and along with the increase of the doping amount of MIL-101, the permeation rate of ethylbenzene is increased, and the permeability is improved. The method can be used for separating the VOCs-containing waste gas.

Description

technical field [0001] The invention belongs to the technical field of membrane materials, and in particular relates to a preparation method of a mixed matrix membrane material obtained by doping a metal-organic coordination polymer material into a polymer compound. Background technique [0002] Mixed matrix membranes (MMMs), as a composite material, are constructed by incorporating inorganic substances as dispersed particles in a continuous phase of polymers or copolymers. Mixed matrix membranes are able to combine the ease of processability and good mechanical properties of polymer membranes with the excellent permeability and selectivity of crystalline porous fillers. Therefore, mixed matrix membranes show great potential in gas separation, especially in the field of air pollution prevention and control such as pervaporation separation of VOCs. However, a large number of toxic and harmful solvents such as N, N-dimethylacetamide (DMA), N-methylpyrrolidone (NMP), chlorofor...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D53/22
CPCB01D67/0002B01D53/228B01D2257/7027B01D2257/708
Inventor 郭振济赵东风刘忠源康子曦逄佳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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