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Imidazole functionalized polyvinyl chloride anion exchange membrane as well as preparation method and application thereof

An anion exchange membrane, polyvinyl chloride technology, applied in the direction of anion exchange, ion exchange, ion exchange treatment devices, etc., can solve the problems of proton leakage, the modified PVC membrane does not have acid resistance properties, etc., to reduce proton leakage, Good structural stability and the effect of enhancing compactness

Inactive Publication Date: 2022-04-29
浙江佰辰低碳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a serious problem with the anion membrane used in electrodialysis to concentrate acid: proton leakage
However, there is no acid-blocking anion exchange membrane prepared with PVC as the base film at present, and the modified PVC membranes that have been reported do not have good acid-blocking properties.

Method used

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  • Imidazole functionalized polyvinyl chloride anion exchange membrane as well as preparation method and application thereof
  • Imidazole functionalized polyvinyl chloride anion exchange membrane as well as preparation method and application thereof
  • Imidazole functionalized polyvinyl chloride anion exchange membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, the imidazole functionalized polyvinyl chloride anion exchange membrane was prepared as follows: 1) Pour 80 mL of N,N-dimethylacetamide (DMAc) into a 250 mL round-bottomed flask, and then add 4.0000 g of polyvinyl chloride The solid powder was stirred at 25°C until the polyvinyl chloride was completely dissolved to obtain a colorless and transparent solution, and a uniform PVC solution was obtained.

[0027] 2) 3.9740 g of N-butylimidazole was added dropwise to the PVC solution, and stirred magnetically for 10 h to fully react with the PVC main chain.

[0028] 3) The uniform casting solution obtained by the reaction is degassed and poured into a glass plate mold, and dried at 60°C to form a film to obtain an imidazole-functionalized polyvinyl chloride anion-exchange membrane (PVC@N-butylimidazole-functionalized anion-exchange membrane). film) with a film thickness of 102 μm.

[0029] FTIR spectra of PVC and as-prepared PVC@N-butylimidazole functionalized ani...

Embodiment 2

[0030] Example 2, the imidazole functionalized polyvinyl chloride anion exchange membrane was prepared as follows: 1) Pour 80 mL of N,N-dimethylacetamide into a 250 mL round-bottomed flask, and then add 4.0000 grams of polyvinyl chloride solid powder, Stir at 25°C until the polyvinyl chloride is completely dissolved to obtain a colorless and transparent solution, and a homogeneous PVC solution is obtained.

[0031] 2) 2.6275 g of N-methylimidazole was added dropwise to the PVC solution, and stirred magnetically for 15 h to fully react with the PVC main chain.

[0032] 3) The uniform casting solution obtained by the reaction is deaerated and poured into a glass plate mold, and dried at 70°C to form a film to obtain an imidazole-functionalized polyvinyl chloride anion-exchange membrane (PVC@N-butylimidazole-functionalized anion-exchange membrane). film) with a film thickness of 105 μm.

[0033] The experimental results show that the ion exchange capacity of the prepared imidazo...

Embodiment 3

[0034] Example 3, the imidazole functionalized polyvinyl chloride anion exchange membrane was prepared by the following method: 1) Pour 80 mL of N,N-dimethylacetamide into a 250 mL round-bottomed flask, and then add 4.0000 grams of polyvinyl chloride solid powder, Stir at 25°C until the polyvinyl chloride is completely dissolved to obtain a colorless and transparent solution, and a homogeneous PVC solution is obtained.

[0035] 2) 3.0761 g of N-ethylimidazole was added dropwise to the PVC solution, and stirred magnetically for 24 h to fully react with the PVC main chain.

[0036] 3) The uniform casting solution obtained by the reaction is deaerated and poured into a glass plate mold, and dried at 80°C to form a film to obtain an imidazole-functionalized polyvinyl chloride anion-exchange membrane (PVC@N-butylimidazole-functionalized anion-exchange membrane). film) with a film thickness of 103 μm.

[0037] The experimental results show that the ion exchange capacity of the prep...

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Abstract

The invention discloses an imidazole functionalized polyvinyl chloride anion exchange membrane and a preparation method and application thereof.The preparation method comprises the following steps that 1, at least one of DMF, DMAc and NMP serves as a solvent, polyvinyl chloride powder is added into the solvent and stirred to be completely dissolved, and an imidazole functionalized polyvinyl chloride anion exchange membrane is obtained; one of N-methylimidazole, N-ethylimidazole, N-propylimidazole or N-butylimidazole is added into the completely dissolved solution, stirring and reaction are performed for 10-24 hours to obtain a solution, and the dosage ratio of the polyvinyl chloride powder to the solvent to one of N-methylimidazole, N-ethylimidazole, N-propylimidazole or N-butylimidazole is (4-8) g: (60-120) mL: (3.0-6.0) g; and 2) defoaming the solution, and drying at 60-100 DEG C to form a membrane, thereby obtaining the imidazole functionalized polyvinyl chloride anion exchange membrane. The membrane is good in structural stability and low in proton leakage, and the acid concentration effect of electrodialysis concentrated acid is superior to that of a commercial membrane.

Description

technical field [0001] The invention belongs to the field of polymeric polymer materials, in particular to an imidazole functionalized polyvinyl chloride anion exchange membrane and a preparation method and application thereof. Background technique [0002] Anion exchange membranes have a wide range of applications in diffusion dialysis, electrodialysis, alkaline fuel cells, separation of mixed salt systems with homoelectricity but different valence ions. Among them, the recovery and utilization of waste acid is an important practical application in electrodialysis technology. In the industrial production process, a large amount of acid-containing wastewater will be generated, which has huge application potential for waste acid recovery and resource utilization. The value of the acid product is positively correlated with its concentration. The higher the concentration, the greater the added value. The recovery of the high concentration acid product can improve the economic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/14B01J47/12
CPCB01J41/14B01J47/12
Inventor 施龙
Owner 浙江佰辰低碳科技有限公司
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