Unlock instant, AI-driven research and patent intelligence for your innovation.

Inherent microporous polymeric membrane regulated and controlled by hydrogen-bond interaction as well as preparation and application of intrinsic microporous polymeric membrane

A hydrogen bonding, inherently microporous technology, applied in membrane technology, organic chemistry, semi-permeable membrane separation, etc., can solve problems such as difficult industrial application, achieve high selectivity, enhance interchain interaction, permeability and selectivity sexual effect

Active Publication Date: 2022-05-27
TIANJIN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that the C of PIM-1 membrane 3 h 6 / C 3 h 8 The selectivity is only 2.98, which is difficult for industrial application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inherent microporous polymeric membrane regulated and controlled by hydrogen-bond interaction as well as preparation and application of intrinsic microporous polymeric membrane
  • Inherent microporous polymeric membrane regulated and controlled by hydrogen-bond interaction as well as preparation and application of intrinsic microporous polymeric membrane
  • Inherent microporous polymeric membrane regulated and controlled by hydrogen-bond interaction as well as preparation and application of intrinsic microporous polymeric membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, the preparation of the inherent microporous polymer membrane regulated by hydrogen bonding, the steps are as follows:

[0019] Step 1) Preparation of PIM-1: take 3.0 g of tetrafluoroterephthalonitrile, 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethyl-1,1'- Spiral double indane 5.1g was added to a four-necked flask; 100mL of anhydrous DMF was added to the reaction system, and the flask was placed in an oil bath at 57°C and stirred for 30min until the monomer was completely dissolved and turned dark brown; 4.2g of Potassium carbonate in water, the reaction system turned yellow, and the reaction was continued for 34 h. The reaction product was washed and purified with methanol and water, respectively, and vacuum-dried at 120° C. for 24 h to obtain PIM-1 polymer.

[0020] Step 2) Prepare PIM-1 macromolecule by using the high temperature method or low temperature method reported in the literature in step 1); dissolve the PIM-1 macromolecule in tetrahydrofuran to fo...

Embodiment 2

[0023] Example 2. Preparation of an inherently microporous polymer membrane regulated by hydrogen bonding. The preparation process is basically the same as that in Example 1, except that in step 2), the amount of 4,4'-bipyridine molecules added was changed from 0.002g Changed to 0.004g; the final obtained film was recorded as film 2. The cross-sectional electron microscope image of film 2 is as follows figure 2 shown.

[0024]Use Membrane 2 for C 3 H 6 / C 3 H 8 Separation, under the condition of 25 ℃, raw gas pressure 0.5 bar, C 3 H 6 The permeability coefficient is 171Barrer, C 3 H 6 / C 3 H 8 The selectivity is 17, such as Figure 4 shown.

Embodiment 3

[0025] Example 3. Preparation of an inherently microporous polymer membrane regulated by hydrogen bonding. The preparation process is basically the same as that in Example 1, except that in step 2), the amount of 4,4'-bipyridine molecules added was changed from 0.002g to 0.002g. Changed to 0.008g; the final obtained film was recorded as film 3. The cross-sectional electron microscope image of film 3 is as follows image 3 shown.

[0026] Use Membrane 3 for C 3 H 6 / C 3 H 8 Separation, under the condition of 25 ℃, raw gas pressure 0.5 bar, C 3 H 6 The permeability coefficient is 110Barrer, C 3 H 6 / C 3 H 8 The option is 19, such as Figure 4 shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
osmotic coefficientaaaaaaaaaa
osmotic coefficientaaaaaaaaaa
osmotic coefficientaaaaaaaaaa
Login to View More

Abstract

The invention discloses an inherent microporous polymeric membrane regulated and controlled by hydrogen-bond interaction. The inherent microporous polymeric membrane is prepared by two steps of amidoximation modification and bipyridine introduction. According to amidoximation modification, a hydroxylamine aqueous solution reacts with a tetrahydrofuran solution of PIM-1 for a specific time, and cyano groups of PIM-1 are converted into amidoxime groups. The introduction of bipyridine comprises the following steps: dissolving amidoxime modified PIM-1 macromolecules in an N, N-dimethylacetamide solvent, adding a certain amount of bipyridine molecules, fully stirring, and volatilizing the solvent to form the membrane. A cross-linked network is constructed by utilizing the hydrogen-bond interaction between bipyridine molecules and amidoxime groups, and the microporous structure in the membrane is regulated and controlled. The preparation method has the advantages of high controllability in the preparation process, diversified and adjustable structures, universal method and the like. When the membrane is applied to a C3H6 / C3H8 system, the performance restriction of a traditional polymeric membrane can be broken through, high selectivity and relatively high permeability are realized, and the membrane has certain application potential in C3H6 / C3H8 separation.

Description

technical field [0001] The invention relates to the preparation and application of an inherent microporous polymer membrane regulated by hydrogen bonding, and belongs to the technical field of polymer membranes. Background technique [0002] Ethylene and propylene, as basic chemical raw materials, are one of the organic chemicals with the largest output in the world, and downstream products include polyolefins, ethylene oxide, etc. Among them, the output of ethylene is also an important indicator to measure the development level of a country's chemical industry. At present, olefins are mainly produced by processes such as naphtha steam cracking and ethane (or propane) dehydrogenation, and the products are all accompanied by a certain amount of alkanes. The downstream production requires high-purity olefins, especially the production of polyolefins: the purity of ethylene needs to be ≥99.9 wt%, and the purity of propylene needs to be ≥99.5 wt%. Therefore, ethylene / ethane an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/76C07C7/144C07C11/06C07C9/08
CPCB01D67/0002B01D67/0011B01D71/76C07C7/144C07C11/06C07C9/08Y02P20/50
Inventor 姜忠义吴洪任燕雄刘琳徐中兴张特冯涵
Owner TIANJIN UNIV