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Sulfonated polyarylether compound and preparation method thereof, ion-selective composite porous membrane and preparation method and application thereof

A sulfonated polyarylene ether, ion selectivity technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, can solve the problems of low ion flux and poor ion selectivity of composite membrane materials, and achieve low cost. , the effect of good flexibility and high practical value

Active Publication Date: 2021-08-20
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite membrane materials prepared by the above method still have the problems of low water and ion flux and poor ion selectivity.

Method used

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  • Sulfonated polyarylether compound and preparation method thereof, ion-selective composite porous membrane and preparation method and application thereof
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  • Sulfonated polyarylether compound and preparation method thereof, ion-selective composite porous membrane and preparation method and application thereof

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preparation example Construction

[0052] The present invention provides a preparation method for the sulfonated polyarylether compound described in the above technical scheme, comprising the following steps:

[0053] Mix the first monomer, the second monomer, the third monomer, an organic solvent, a catalyst, and a water-carrying agent, heat to the reflux temperature of the water-carrying agent for water removal treatment, and then raise the temperature for polycondensation reaction to obtain polyarylether compound;

[0054] Sulfonating the polyarylether compound to obtain a sulfonated polyarylether compound having a structure shown in formula I or formula II;

[0055] The first monomer is

[0056] The second monomer is

[0057]

[0058]

[0059] The third monomer is The X is a halogen group.

[0060] In the present invention, the first monomer, the second monomer, the third monomer, the organic solvent, the catalyst and the water-carrying agent are mixed, heated to the reflux temperature of the w...

Embodiment 1

[0086] Under the condition of anhydrous and argon protection, 20.0mmol (5.09g) of 4,4'-difluorodiphenylsulfone, 12.0mmol (2.23g) of 4,4'-dihydroxybiphenyl, 8.0mmol (2.00g) of 4,4'-dihydroxydiphenylsulfone, 4.0g of potassium carbonate, 14mL of toluene and 30mL of sulfolane, and the resulting mixed system was heated to reflux (145°C) under stirring conditions for 4h, so that the toluene was fully Remove the water generated in the system; then heat the obtained system to 180°C for 9 hours, and the viscosity of the system will not change; pour the obtained product system into deionized water to precipitate solid materials, filter, grind the obtained solid materials and wash them with boiling water Washed 3 times, then washed 3 times with ethanol, and dried in vacuum at 80°C to constant weight to obtain a white solid, which is a polyarylether compound. The inherent viscosity of the polyarylether compound is 0.99, and the number average The molecular weight is 119.8kDa, and the disp...

Embodiment 2

[0090] Mix 3.125 mg of sulfonated polyarylether compound prepared in Example 1, 12.5 mg of manganese dioxide two-dimensional material (thickness 1-5 nm) and 10 mL of N,N-dimethylformamide, and ultrasonically disperse at room temperature for 30 min. Let the obtained system stand still for 30 minutes, take the supernatant and pour it into a suction filter bottle, use nylon 66 organic 0.45 μm filter membrane for vacuum suction filtration, and then vacuum-dry the filter membrane containing the filter cake at 50°C for 24 hours , forming a sulfonated polyarylether-manganese dioxide porous membrane on the upper surface of the filter membrane, the sulfonated polyarylether-manganese dioxide porous membrane can be peeled off from the filter membrane, and the sulfonated polyarylether-manganese dioxide porous membrane can be removed from the filter membrane, and the sulfonated polyarylether- The manganese dioxide porous membrane has a thickness of 22 μm, a pore diameter of 1.23 nm, and a p...

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Abstract

The invention provides a sulfonated polyarylether compound and a preparation method thereof, an ion-selective composite porous membrane and a preparation method and application thereof, and belongs to the technical field of functional materials. A main chain of the sulfonated polyarylether compound provided by the invention is charged, the sulfonated polyarylether compound has good ion selectivity, the sulfonated polyarylether compound is compounded with a two-dimensional material, the ion selective composite porous membrane with an asymmetric structure is prepared through suction filtration and electrostatic spinning, and the ion-selective composite porous membrane is relatively large in membrane pore and relatively high in water and ion flux, has a typical ion current rectification effect, and can realize high output power, high energy utilization rate and stable salinity gradient power generation. Meanwhile, the ion-selective composite porous membrane contains a high polymer material sulfonated polyarylether compound, is relatively good in flexibility, and has good thermal stability, chemical stability and membrane-forming property of a polyarylether material.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a sulfonated polyarylether compound and a preparation method, an ion-selective composite porous membrane, a preparation method and application. Background technique [0002] Energy is an important material basis for economic development and a prerequisite for improving people's living standards. However, the use of a large amount of fossil fuels has also caused environmental pollution and damage to the ecological environment. Therefore, the development and utilization of clean and renewable energy has become a top priority. [0003] Salinity difference energy is the chemical potential difference energy between seawater, freshwater or between two seawaters with different salinity concentrations. It is a renewable energy with the highest energy density in ocean energy. Reverse electrodialysis is an energy conversion method that directly converts the salt difference e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23C08J5/18C08L81/06C08K3/22B01D67/00B01D69/02B01D69/12B01D71/52D01D5/00
CPCC08G75/23C08J5/18B01D71/52B01D69/12B01D69/02B01D67/0006D01D5/003D01D5/0084C08J2381/06C08K2003/2262
Inventor 朱轩伯钟俊东姜振华许婷婷
Owner JILIN UNIV
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