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Preparation and application of anion-responsive ionic liquid-polyvinyl chloride membrane

A technology of polyvinyl chloride membrane and ionic liquid, which is applied in the field of polymer materials, can solve the problem of ionic liquid recovery that has not been solved, and achieve good self-cleaning and anti-pollution performance, not easy to lose, and simple preparation process.

Inactive Publication Date: 2017-07-04
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the structural characteristics of ionic liquids make them structurally adjustable, but the problem of recycling ionic liquids during use has not been resolved.

Method used

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  • Preparation and application of anion-responsive ionic liquid-polyvinyl chloride membrane
  • Preparation and application of anion-responsive ionic liquid-polyvinyl chloride membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation process of ionic liquid-polyvinyl chloride membrane with anion responsiveness:

[0027] (1) Preparation of polyvinyl chloride immobilized ionic liquid polymer

[0028] Disperse polyvinyl chloride powder in a mixed solvent of ethanol and water. The volume ratio of ethanol to water is 5:1. Then add N-methylimidazole. The mass ratio of polyvinyl chloride powder and N-methylimidazole is 1:1. 4. Protected by argon, react at 70°C for 24 hours, cool the solution, centrifuge, and repeatedly wash with ethanol and deionized water, and dry in a vacuum oven at 25°C to prepare polyvinyl chloride immobilized ionic liquid polymer powder;

[0029] (2) Preparation of ionic liquid-polyvinyl chloride membrane with anion responsiveness

[0030] Dissolve polyvinyl chloride-supported ionic liquid polymer powder and polyvinylpyrrolidone in dimethyl sulfoxide to prepare a 15wt% polyvinyl chloride-supported ionic liquid polymer as a casting solution, and stir at 70°C to Uniformity; the sol...

Embodiment 2

[0034] Preparation process of ionic liquid-polyvinyl chloride membrane with anion responsiveness:

[0035] (1) Preparation of polyvinyl chloride immobilized ionic liquid polymer

[0036] Disperse the polyvinyl chloride powder in a mixed solvent of ethanol and water. The volume ratio of ethanol to water is 3:1, and then N-ethylimidazole is added. The mass ratio of polyvinyl chloride powder and N-ethylimidazole is 1:1. 6. React at 60℃ for 48h under the protection of argon, cool the solution, centrifuge, and repeatedly wash with ethanol and deionized water, and dry at 50℃ in a vacuum oven to prepare polyvinyl chloride immobilized ionic liquid polymer;

[0037] (2) Preparation of ionic liquid-polyvinyl chloride wetting switch membrane with anion responsiveness

[0038] Dissolve polyvinyl chloride immobilized ionic liquid polymer and polyvinylpyrrolidone in an organic solvent, stir at 60°C until uniform, and prepare a polyvinyl chloride immobilized ionic liquid polymer accounting for 25wt%...

Embodiment 3

[0040] Preparation process of ionic liquid-polyvinyl chloride membrane with anion responsiveness:

[0041] (1) Preparation of polyvinyl chloride immobilized ionic liquid polymer

[0042] Disperse polyvinyl chloride powder in a mixed solvent of ethanol and water. The volume ratio of ethanol to water is 1:1, and then N-propylimidazole is added. The mass ratio of polyvinyl chloride powder and N-propylimidazole is 4: 1. Protected by argon, react at 85°C for 12 hours, cool the solution, centrifuge, and repeatedly wash with ethanol and deionized water, and dry in a vacuum oven at 25°C to prepare polyvinyl chloride immobilized ionic liquid polymer;

[0043] (2) Preparation of ionic liquid-polyvinyl chloride wetting switch membrane with anion responsiveness

[0044] Dissolve polyvinyl chloride immobilized ionic liquid polymer and KCl in N,N-dimethylformamide, stir at 85°C until uniform, and prepare a cast film with polyvinyl chloride immobilized ionic liquid polymer accounting for 8wt% Liqui...

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Abstract

The invention belongs to the field of high polymer materials, and particularly discloses preparation and application of an ionic liquid-polyvinyl chloride membrane with anion response. The preparation method comprises the following steps: firstly preparing a polyvinyl chloride supported ionic liquid polymer, then using an immersion precipitation phase inversion process to prepare the ionic liquid-polyvinyl chloride wetted gating mechanism with the anion response. The preparation method disclosed by the invention is simple in process, accessible in raw materials, short in reaction time, mild in anion response conditions, free of expensive instruments, and easy to realize industrialized implementation; the prepared ionic liquid-polyvinyl chloride wetted gating mechanism with the anion response is good in antifouling property and stability, retains the good physical properties of the polyvinyl chloride membrane, and has the anion responsiveness; the membrane can be used for anion detection, and is high in efficiency and simple to operate as the anion type in the solution can be judged by the contact angle change on the membrane surface.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a preparation method and application of an ionic liquid-polyvinyl chloride membrane with anion responsiveness. Background technique [0002] Polyvinyl chloride (PVC) is a commonly used synthetic polymer film-forming material with good mechanical properties, thermal stability, solvent resistance and microbial corrosion resistance. However, due to its low surface energy and strong hydrophobic properties, its anti-fouling and biocompatibility are poor, and the polymer porous membrane prepared from it is likely to cause non-specific protein adsorption in practical applications. The membrane modifications made by the predecessors in response to its shortcomings all made the surface of the PVC membrane tend to be single hydrophilic or single hydrophobic. However, in certain fields, polymer films are required to have bionic properties and unique switchable properties, so that the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J9/26C08L27/06C08K5/3445
Inventor 李建华闫邦锋王双双张德彬张其清
Owner FUZHOU UNIV