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Polyarylether compound and preparation method thereof, polyarylether-hydrogel composite porous membrane and preparation method and application thereof

A technology of polyarylether and compound, which is applied in the field of polyarylether-hydrogel composite porous membrane and its preparation, can solve the problems of low operating cost and weak ion selectivity, and achieve low cost, high practical value, and ion selectivity good sex effect

Active Publication Date: 2021-10-01
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used ion-selective material is ion-exchange resin, which has the advantages of large flux, ability to screen various ions, repeated regeneration, long working life and low operating cost, etc., but its ion-selective Not strong, which limits its further application

Method used

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  • Polyarylether compound and preparation method thereof, polyarylether-hydrogel composite porous membrane and preparation method and application thereof
  • Polyarylether compound and preparation method thereof, polyarylether-hydrogel composite porous membrane and preparation method and application thereof
  • Polyarylether compound and preparation method thereof, polyarylether-hydrogel composite porous membrane and preparation method and application thereof

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preparation example Construction

[0050] The present invention provides the preparation method of polyarylether compound described in above-mentioned technical scheme, comprises the following steps:

[0051] 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 to perform water removal treatment, and then increase the temperature to carry out polycondensation reaction to obtain a formula I Or the polyarylether compound of structure shown in formula II;

[0052] The first monomer is

[0053] The second monomer is

[0054] The third monomer is The X is a halogen group.

[0055]In the present invention, the third monomer is p-halogenated diphenyl sulfone / ketone monomer, wherein the halogen group is preferably -F or -Cl. In the present invention, there is no special limitation on the molar ratio of the first monomer to the second monomer, any molar ratio is acceptable, and the...

Embodiment 1

[0077]Under the condition of anhydrous and argon protection, add 20.0mmol (5.09g) of 4,4'-difluorodiphenylsulfone and 8.0mmol of 4,4-bis(4-hydroxyphenyl)pentanoic acid into a 100mL three-necked flask (2.29g), 2,2'-bis(4-hydroxyphenyl)-hexafluoropropane 12.0mmol (4.04g), 4.0g potassium carbonate, 14mL toluene and 36mL sulfolane, the resulting mixed system was heated to Reflux (145°C) for 4 hours to allow the toluene to fully remove the water generated in the system; then heat the obtained system to 175°C for 6 hours, and the viscosity of the system will not change; pour the obtained product system into deionized water to precipitate solid materials. After the solid material is pulverized, it is washed with boiling water for 3 times, and then with ethanol for 3 times, and then dried in vacuum at 80°C to a constant weight to obtain a white solid, which is a polyarylether compound. The logarithmic viscosity is 0.53, the number average molecular weight is 65kDa, and the dispersibil...

Embodiment 2

[0079] Mix 1 g of the polyarylether compound prepared in Example 1, 1 g of polyvinylpyrrolidone-K30, and 3.45 mL of N-methylpyrrolidone, and stir for 10 h at room temperature (25° C.) under airtight conditions to obtain a clear and transparent viscous liquid. After cloth filtration, stand for degassing for 12 hours to obtain the casting solution;

[0080] Cast the film casting solution on the surface of a smooth and flat 10cm×10cm glass plate, scrape it into a thin and uniform liquid film with a glass scraper, expose it to the air for 2 minutes, and slowly immerse the liquid film and glass plate in deionization In water, solvent exchange occurs, the water is changed once every 8 hours, and the water is changed three times in total. The obtained film is removed and dried at 60°C for 12 hours to obtain a polyarylene ether porous film with a thickness of 47 μm, a pore size of 180 nm, and a porosity of 42.9%. ;

[0081] Mix 2.5g of 2-acrylamide-2-methylpropanesulfonic acid, 0.025...

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Abstract

The invention provides a polyarylether compound and a preparation method thereof, and a polyarylether-hydrogel composite porous membrane and a preparation method and application thereof, and belongs to the technical field of functional materials. The side chain of the polyarylether compound provided by the invention is charged, the polyarylether compound has good ion selectivity, the polyarylether porous membrane is prepared based on the polyarylether compound, then charged hydrogel is grafted on the single surface of the polyarylether porous membrane, and the polyarylether-hydrogel composite porous membrane with an asymmetric structure is obtained. The polyarylether-hydrogel composite porous membrane is good in ion selectivity 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.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a polyarylether compound and a preparation method, a polyarylether-hydrogel composite porous membrane, a preparation method and application. Background technique [0002] With the improvement of people's living standards, the consumption of energy is further promoted. The massive exploitation and use of non-renewable resources such as oil, gas and coal have also caused environmental pollution and damage to the ecological environment. Therefore, the development of clean and renewable energy has become a top priority. [0003] Salt difference power generation is an energy conversion method that uses the chemical potential difference energy between seawater, fresh water, or two seawaters with different salinity concentrations, and converts it into electrical energy through ion-selective membrane materials. Among them, the salt difference power generation device is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23C08J9/28C08J9/36C08L81/06
CPCC08G75/23C08J9/28C08J9/36C08J2381/06
Inventor 朱轩伯钟俊东姜振华许婷婷
Owner JILIN UNIV
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