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Alcohol soluble high-ionic selective negative ion exchange membrane, preparation method thereof and application of exchange membrane

An anion-exchange membrane and ion-selective technology, applied in anion exchange, ion exchange, chemical instruments and methods, etc., to achieve the effects of inhibiting water absorption and swelling, broad application prospects, high economic benefits and environmental benefits

Inactive Publication Date: 2019-07-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of this method in improving membrane anion and cation selectivity has not been reported.

Method used

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  • Alcohol soluble high-ionic selective negative ion exchange membrane, preparation method thereof and application of exchange membrane
  • Alcohol soluble high-ionic selective negative ion exchange membrane, preparation method thereof and application of exchange membrane
  • Alcohol soluble high-ionic selective negative ion exchange membrane, preparation method thereof and application of exchange membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of long hydrophobic alkyl side chain tadpole polyphenylene ether ionomer PPO-DMODA-A:

[0031] Dissolve 9g of PPO (75mmol of repeating unit) in 100mL of chlorobenzene, add N-bromosuccinimide NBS (5.34g, 30mmol) and azoisobutyronitrile AIBN (0.33g, 2mmol), and react at 135°C 3h, the reaction solution 1 was obtained, and the reaction solution 1 was cooled to room temperature and dropped into 1000mL methanol to obtain a light yellow precipitate, which was washed with methanol and dried to obtain a crude product, which was dissolved in dichloromethane and prepared The mass fraction is 10% mixed solution, and 100mL acetone is slowly added into the mixed solution to obtain light yellow particles, which are pure bromomethylated PPO, i.e. BPPO, and the degree of bromination x=0.3; the obtained 1.42 g BPPO (3 mmol moles of bromomethyl) was dissolved in 27 mL of N-methylpyrrolidone, N,N-dimethyloctadecylamine (3 mmol, 0.89 g) was added, and reaction solution 2 was...

Embodiment 2

[0036] (1) Preparation of long hydrophobic alkyl side chain tadpole polyphenylene ether ionomer PPO-DMODA-B:

[0037] Dissolve 9 g of PPO (75 mmol of repeating unit) in 100 mL of chlorobenzene, add N-bromosuccinimide NBS (6.67 g, 37.5 mmol) and azoisobutyronitrile AIBN (0.41 g, 2.5 mmol), at 135 °C React for 3 hours to obtain reaction solution 1. Cool the reaction solution 1 to room temperature and drop into 1000mL methanol to obtain a light yellow precipitate. The light yellow precipitate is washed with methanol and dried to obtain a crude product. The crude product is dissolved in dichloromethane Finally, a mixed solution with a mass fraction of 10% was prepared, and 100 mL of acetone was slowly added to the mixed solution to obtain light yellow particles, which were pure bromomethylated PPO, i.e. BPPO, and the degree of bromination x=0.4; The obtained 1.5g BPPO (the bromomethyl mole number is 4mmol) was dissolved in 31mL N-methylpyrrolidone, N,N-dimethyloctadecylamine (4mmo...

Embodiment 3

[0042] (1) Preparation of long hydrophobic alkyl side chain tadpole polyphenylene ether ionomer PPO-DMODA-C:

[0043] Dissolve 9g of PPO (75mmol of repeating unit) in 100mL of chlorobenzene, add N-bromosuccinimide NBS (8.01g, 45mmol) and azoisobutyronitrile AIBN (0.49g, 3mmol), and react at 135°C 3h, the reaction solution 1 was obtained, and the reaction solution 1 was cooled to room temperature and dropped into 1000mL methanol to obtain a light yellow precipitate, which was washed with methanol and dried to obtain a crude product, which was dissolved in dichloromethane and prepared The mass fraction is 10% mixed solution, and 100mL acetone is slowly added into the mixed solution to obtain light yellow particles, which are pure bromomethylated PPO, i.e. BPPO, and the degree of bromination x=0.5; the obtained 1.58 g BPPO (the bromomethyl molarity is 5 mmol) was dissolved in 35 mL of N-methylpyrrolidone, N,N-dimethyloctadecylamine (5 mmol, 1.49 g) was added, and reaction solutio...

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Abstract

The invention discloses an alcohol soluble high-ionic selective negative ion exchange membrane, a preparation method thereof and an application of the exchange membrane. A material of the ion exchangemembrane is a tadpole type poly phenylene oxide ionizer PPO-DMODA with a long hydrophobic alkyl side chain, ion selective permeability is 91%-97% at the indoor temperature within the range of ion-exchange capacity of 1.38-2.0meq / g, and sheet resistance is 3.5-30.6 omega / cm<2>. According to the preparation method, the long hydrophobic alkyl side chain is introduced on a PPO (poly phenylene oxide)framework, the method solves the problem of low zwitterion selectivity of the PPO-type negative ion exchange membrane under high IEC (ion-exchange column chromatography), a tadpole type poly phenyleneoxide ionizer structure with the long hydrophobic alkyl side chain can effectively restrain water absorbing swelling of the membrane, zwitterion selective permeability of the membrane and ionic conductivity are improved, the membrane has good mechanical property and performance stability, and requirements of electrodialysis and reverse electrodialysis processes for comprehensive performances of the negative ion exchange membrane can be met.

Description

technical field [0001] The invention relates to the technical field of anion exchange membranes, in particular to an alcohol-soluble high ion-selective anion exchange membrane and its preparation method and application. Background technique [0002] With the rapid growth of population and the rapid development of human industrial civilization, problems such as environmental pollution, shortage of fresh water resources, and energy crisis have become increasingly prominent. Controlling environmental pollution, solving water shortage and energy crisis is a difficult problem in today's society. In recent years, the electrodialysis and reverse electrodialysis technologies with ion exchange membranes as the core have attracted people's attention in terms of clean production, environmental protection, energy conversion, etc. due to their simple equipment, convenient operation, high efficiency, and no pollution. , providing a new research direction for solving the current problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08J5/18B01J41/13B01D61/42B01D61/48C08L71/12
CPCB01D61/422B01D61/485B01J41/13C08G65/48C08J5/18C08J2371/12
Inventor 李秀华魏标文余以刚冯俊
Owner SOUTH CHINA UNIV OF TECH
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