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A kind of polystyrene-metal organic polyhedron with orientation structure and its preparation method and application

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

Active Publication Date: 2022-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of polystyrene-metal organic polyhedron with orientation structure and its preparation method and application
  • A kind of polystyrene-metal organic polyhedron with orientation structure and its preparation method and application
  • A kind of polystyrene-metal organic polyhedron with orientation structure and its preparation method and application

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Embodiment 1

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

[0039] (1) Synthesis of 5-tripolystyrene-isophthalic acid (M n =12000g / mol), including 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 bromopropyne, and heat under reflux for 5 hours. After the reaction, it was cooled to room temperature, and the acetone was removed by rotary evaporation; deionized water was added, and extracted with DCM; anhydrous sodium sulfate was added to the obtained organic phase, dried, and filtered; the solvent was removed by rotary evaporation, separated by silica gel column chromatography, and eluted 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-tris(prop-2-yn-1...

Embodiment 2

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

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

Embodiment 3

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

[0062] (1) 5-tripolystyrene-isophthalic acid (M n =22000g / mol) and 5-(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)isophthalic acid monomer in a molar ratio of 1:100, with N,N-diisophthalic acid Methylformamide was used as a solvent, and the organic ligand mother liquor with a molar concentration of 0.15 mol / L was prepared; in addition, N,N-dimethylformamide was used as a solvent, and a copper acetate solution with a molar concentration of 0.15 mol / L was prepared as the metal source mother liquor. Take 20ml of the metal source mother liquor in a 500ml round-bottomed flask, and another 20ml of the organic ligand mother liquor is slowly added dropwise to it, and mixed evenly. The molar ratio of the metal source to the organic ligand in the mixed liquor is 1:1. 100 ml of methanol was added dropwise to the above-mentioned 500 ml round-bottomed flask, allowed t...

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Abstract

The invention discloses a polystyrene-metal organic polyhedron with an orientation structure and its preparation method and application. The preparation method comprises the following steps: preparing polystyrene with isophthalic acid groups at the end and hydroxyl The isophthalic acid monomer mixed solution is used as the organic ligand mother liquor, and then the organic ligand mother liquor is added to the metal source mother liquor, stirred evenly, and then methanol is added dropwise for precipitation, left to stand, filtered to obtain the crude product; the crude product is repeatedly dissolved, Centrifuge, precipitate, filter, purify and separate to obtain polystyrene-metal-organic polyhedron, and anneal at 80-150°C for 1-24h to obtain polystyrene-metal-organic polyhedron with oriented structure. The single-arm metal-organic polyhedron with orientation structure prepared by the invention can take into account the size selectivity of molecular sieves and the good mechanical properties of polymers, has high stability, and can be applied in 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 a preparation method and application thereof. Background technique [0002] The composition of fossil energy is relatively complex, and a large amount of by-products, such as carbon dioxide (CO 2 ), carbon monoxide (CO), dust particles and a variety of sulfur- and nitrogen-containing gases, which are directly discharged into the air, causing serious pollution to the environment, resulting in increasingly serious greenhouse effects, ocean acidification, and biological extinction. The environmental crisis compels us to address this issue as quickly as possible. [0003] Gas separation has become an indispensable part of modern industry. The traditional methods used for gas separation mainly include low temperature distillation, pressure swing adsorption and dry / wet ammonia absorption, etc., but the energy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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