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Polystyrene-metal organic polyhedron with orientated structure as well as preparation method and application thereof

A polystyrene, metal organic technology, applied in the field of materials, achieves the effects of good stability, simple preparation and good mechanical properties

Active Publication Date: 2020-11-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problem that the existing gas separation membranes cannot satisfy both gas separation performance and mechanical properties, the primary purpose of the present invention is to provide a method for preparing polystyrene-metal-organic polyhedrons with an oriented structure. Separation drives metal-organic polyhedrons into long-range ordered channels to prepare a new type of mixed matrix membrane based on metal-organic polyhedral molecular sieve materials, and obtain high selectivity and permeability in gas separation

Method used

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  • Polystyrene-metal organic polyhedron with orientated structure as well as preparation method and application thereof
  • Polystyrene-metal organic polyhedron with orientated structure as well as preparation method and application thereof
  • Polystyrene-metal organic polyhedron with orientated structure as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0038] A preparation method of a polystyrene-metal organic polyhedron with an orientation structure, comprising the following steps:

[0039] (1) Synthetic 5-tripolystyrene-isophthalic acid (M n =12000g / mol), comprising the following steps:

[0040]

[0041] A. Add methyl 3,4,5-trihydroxybenzoate, potassium carbonate and 18-crown-6 into a two-necked round-bottomed flask, add acetone to dissolve it, then add propyne bromide, and heat to reflux for 5 hours. After the reaction was completed, cool to room temperature, remove acetone by rotary evaporation; add deionized water, extract with DCM; add anhydrous sodium sulfate to the obtained organic phase to dry, filter; remove solvent by rotary evaporation, separate by silica gel column chromatography, and elute The solvent is a mixed solvent of DCM and n-hexane (DCM:Hex=1:1, v:v); the organic solvent is removed by rotary evaporation, and dried to obtain a white solid (3,4,5-tri(prop-2-yn-1 -yloxy)methyl benzoate, compound 1), y...

Embodiment 2

[0056] A preparation method of a polystyrene-metal organic polyhedron with an orientation structure, comprising the following steps:

[0057] (1) 5-tripolystyrene-isophthalic acid (M n =16500g / mol) mixed with 5-(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)isophthalic acid in a molar ratio of 1:100, with N,N-dimethyl Formamide is used as a solvent, and an organic ligand mother solution with a molar concentration of 0.15mol / L is prepared; in addition, N,N-dimethylformamide is used as a solvent, and a copper acetate solution with a molar concentration of 0.15mol / L is prepared as a metal source mother solution . Take 20ml of the metal source mother liquor in a 500ml round bottom flask, and slowly add 20ml of the organic ligand mother liquor into it dropwise, and mix evenly. The molar ratio of the metal source and the organic ligand in the mixed liquor is 1:1. Take 100ml of methanol and add dropwise to the above-mentioned 500ml round bottom flask, let it stand for a day, and filter to ob...

Embodiment 3

[0061] A preparation method of a polystyrene-metal organic polyhedron with an orientation structure, comprising the following steps:

[0062] (1) 5-tripolystyrene-isophthalic acid (M n =22000g / mol) mixed with 5-(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)isophthalic acid monomer in a molar ratio of 1:100, N,N-di Methylformamide is used as a solvent, and an organic ligand mother liquor with a molar concentration of 0.15mol / L is prepared; in addition, N,N-dimethylformamide is used as a solvent, and a copper acetate solution with a molar concentration of 0.15mol / L is prepared as a metal source mother liquor. Take 20ml of the metal source mother liquor in a 500ml round bottom flask, and slowly add 20ml of the organic ligand mother liquor into it dropwise, and mix evenly. The molar ratio of the metal source and the organic ligand in the mixed liquor is 1:1. Take 100ml of methanol and add dropwise to the above-mentioned 500ml round bottom flask, let it stand for a day, and filter to obta...

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Abstract

The invention discloses a polystyrene-metal organic polyhedron with an oriented structure as well as a preparation method and application thereof. The preparation method comprises the following steps:preparing a mixed solution of polystyrene with isophthalic acid groups at the tail end and isophthalic acid monomers with hydroxyl at the tail end as an organic ligand mother solution; then adding the organic ligand mother liquor into a metal source mother liquor, uniformly stirring, dropwise adding methanol to precipitate, alowing the mixture to stand, and performing filtration to obtain a crudeproduct; repeatedly dissolving, centrifuging, precipitating, filtering, purifying and separating the crude product to obtain the polystyrene-metal organic polyhedron, and annealing at 80-150 DEG C for 1-24 hours to obtain the polystyrene-metal organic polyhedron with an oriented structure. The single-arm metal organic polyhedron with the orientated structure prepared by the invention can give consideration to both the size selectivity of a molecular sieve and the good mechanical properties of a polymer, has higher stability, and can be applied to the field of gas separation.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a polystyrene-metal organic polyhedron with an orientation structure and its preparation method and application. Background technique [0002] The composition of fossil energy is relatively complex, and a large number of by-products, such as carbon dioxide (CO 2 ), carbon monoxide (CO), dust particles, and a variety of gases containing sulfur and nitrogen, which are directly discharged into the air, causing serious pollution to the environment. The resulting greenhouse effect, ocean acidification, and biological extinction are increasingly serious The environmental crisis forces us to address this issue as quickly as possible. [0003] Gas separation has become an indispensable part of modern industry. The traditional methods for gas separation mainly include cryogenic distillation, pressure swing adsorption and dry / wet ammonia absorption, etc., but the energy consumption is...

Claims

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Application Information

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IPC IPC(8): B01D71/28B01D71/02B01D67/00B01D69/02B01D53/22
CPCB01D71/28B01D71/022B01D67/0002B01D69/02B01D53/22B01D2325/24
Inventor 朱姝玥张维杨易达
Owner SOUTH CHINA UNIV OF TECH