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Polyvinyl imidazole functionalized polysulfone microfiltration membrane as well as preparation method and application thereof

A technology of polyvinylimidazole and vinylimidazole, which is applied in the field of polymer membrane materials, can solve the problems of low ion filtration efficiency and achieve good chemical stability, easy operation, and mild conditions

Active Publication Date: 2020-06-12
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is in order to solve the present porous film to chromate (CrO 4 2- ) and arsenate (AsO 4 3- In order to solve the problems of low ion filtration efficiency of ), a polyvinylimidazole-functionalized polysulfone microfiltration membrane and its preparation method and application are provided. The preparation method is novel, the process is simple, and it has high retention of toxic anions Polyvinylimidazole Functionalized Polysulfone Microporous Membrane

Method used

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  • Polyvinyl imidazole functionalized polysulfone microfiltration membrane as well as preparation method and application thereof
  • Polyvinyl imidazole functionalized polysulfone microfiltration membrane as well as preparation method and application thereof
  • Polyvinyl imidazole functionalized polysulfone microfiltration membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a four-neck flask equipped with a stirrer, a condenser, and a thermometer, add 0.1g CMPSF and 60mL of a mixed solvent composed of ethanol, water, and DMF (volume ratio = 1:1:2), and after swelling for 2 hours, add 0.13 g of 3-hydroxy-N,N-diethylaniline (HDEA) and 0.12 g Na 2 CO 3 , N 2 Protected, stirred at 80°C for 6 h, the membrane was taken out, washed repeatedly with a mixed solvent of ethanol and distilled water at a volume ratio of 1:1, and dried in vacuum to constant weight to obtain a modified polyamide with a side chain bonded to an aromatic tertiary amine. Sulfone membrane PSF-DEA, the binding amount is 1.72umol / cm 2 .

[0033] Add 0.1 g PSF-DEA membrane to 70 mL DMF, after swelling for 2 hours, add 3.2 mL monomer vinylimidazole (VI), N 2 After bubbling for half an hour, raise the temperature to 70°C, add 0.04 g initiator, react for 10 h, take out the membrane, soak it in DMF and ethanol and wash the grafted membrane repeatedly, and dry it in vacuum to ...

Embodiment 2

[0035] In a four-neck flask equipped with a stirrer, a condenser, and a thermometer, add 0.1g CMPSF and 60mL of a mixed solvent composed of ethanol, water, and DMF (volume ratio = 1:1:2), and after swelling for 2 hours, add 0.13 g of 3-hydroxy-N,N-diethylaniline (HDEA) and 0.125 g NaHCO 3 , N 2 protected, stirred at 70°C for 7 h, the membrane was taken out, washed repeatedly with a mixed solvent of ethanol and distilled water at a volume ratio of 1:1, and dried in vacuo to constant weight to obtain a modified polyamide with a side chain bonded to an aromatic tertiary amine. Sulfone membrane PSF-DEA, the binding amount is 1.64umol / cm 2 .

[0036] Add 0.1 g PSF-DEA membrane to 70 mL DMF, after swelling for 2.5 hours, add 3.1 mL monomer vinylimidazole (VI), N 2 After bubbling for half an hour, raise the temperature to 70°C, add 0.05 g initiator, react for 11 h, take out the membrane, soak it in DMF and ethanol and wash the grafted membrane repeatedly, dry it in vacuum to const...

Embodiment 3

[0038] In a four-neck flask equipped with a stirrer, a condenser, and a thermometer, add 0.1g CMPSF and 60mL of a mixed solvent composed of ethanol, water, and DMF (volume ratio = 1:1:2), and after swelling for 2 hours, add 0.13 g of 3-hydroxy-N,N-diethylaniline (HDEA) and 0.12 g NaOH, N 2 Protected, stirred at 70°C for 6 h, the membrane was taken out, washed repeatedly with a mixed solvent of ethanol and distilled water at a volume ratio of 1:1, and dried in vacuum to constant weight to obtain a modified polyamide with a side chain bonded to an aromatic tertiary amine. Sulfone membrane PSF-DEA, the binding amount is 1 .67umol / cm 2 .

[0039] Add 0.1 g PSF-DEA membrane to 70 mL DMF, after swelling for 3 hours, add 3.3 mL monomer vinylimidazole (VI), N 2 After bubbling for half an hour, the temperature was raised to 65°C, and 0.042 g of initiator was added. After 12 h of reaction, the membrane was taken out, soaked in DMF and ethanol and washed repeatedly, and dried in vacuum...

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Abstract

The invention belongs to the technical field of polymer membrane materials, and provides a polyvinyl imidazole functionalized polysulfone micro-filtration membrane and a preparation method and application thereof in order to solve the problems of low chromate and arsenate ion filtering efficiency and the like of an existing porous membrane. A polysulfone membrane is used as a base membrane, and anaromatic tertiary amine group is bonded to the surface of the polysulfone membrane after chloromethylation modification; then the base membrane is placed into a dimethylformamide solution containinga vinyl imidazole monomer and an oil-soluble initiator, and graft polymerization is conducted on the surface of the membrane under the action of a redox type surface initiation system consisting of aromatic tertiary amine and BPO or AIBN, so as to obtain the polyvinyl imidazole functionalized polysulfone micro-filtration membrane PSF-g-PVI. The preparation method is simple and easy to operate. Themicrofiltration membrane has a strong adsorption effect on chromate anions and arsenate anions, and toxic anions are effectively removed by taking the adsorbent as a filter membrane to perform a membrane separation process. The microfiltration membrane is a microporous filter membrane, has high flow rate, and has excellent mechanical properties, thermal stability, chemical stability and the likeof the polysulfone membranes.

Description

technical field [0001] The invention belongs to the technical field of polymer membrane materials, and in particular relates to a polyvinylimidazole functionalized polysulfone microfiltration membrane and its preparation method and application, which are used for efficiently intercepting toxic anions in water. Background technique [0002] Chromate and arsenate are toxic anionic pollutants that contaminate water systems, enter the food chain, and cause fatal diseases in humans. Hexavalent chromium (Cr(VI)) is considered to be a highly toxic substance, and its chromate can cause cancer, mutation and teratogenicity when entering the human body. Arsenates containing pentavalent arsenic As (V) have been classified as a class I human carcinogen, and arsenic exposure can cause skin and various internal cancers as well as other diseases such as cardiovascular and neurological disorders. Therefore, there is an urgent need to develop water treatment strategies to reduce the concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00C02F1/44C02F101/10C02F101/22
CPCB01D71/68B01D69/02B01D67/0002C02F1/444C02F2101/22C02F2101/103B01D2325/24
Inventor 王蕊欣刘叶峰左鹏陈南王飞高保娇
Owner ZHONGBEI UNIV
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