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A kind of functional ionic liquid-gelatin composite film and preparation method thereof

A technology of ionic liquid and composite membrane, which is applied in the fields of vacuum drying membrane formation, β-cyclodextrin inclusion compound to prepare casting solution by physical blending, and preparation of functional ionic liquid-gelatin composite membrane, and achieves abundant preparation effect of means

Active Publication Date: 2022-06-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports and practical applications of bifunctional ionic liquid-gelatin composite membrane materials that are suitable for separation or catalysis or both.

Method used

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  • A kind of functional ionic liquid-gelatin composite film and preparation method thereof
  • A kind of functional ionic liquid-gelatin composite film and preparation method thereof
  • A kind of functional ionic liquid-gelatin composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Preparation of gelatin / porogen system with filtration function

[0029] The gelatin aqueous solution with a mass fraction of 4~12% and a porogen aqueous solution with a mass fraction of 1~7% (porogens include: polyacrylamide, or sodium chloride, or polyvinylpyrrolidone) are mixed with a certain ratio. (m 明胶 / m 致孔剂 =9 / 1, 8 / 2, 7 / 3, 6 / 4) at 40 o Fully stirred at C for 1 h, cooled to room temperature; poured 0.5-2.5 mL of the casting solution into a Buchner funnel with a nylon filter membrane (50 mm in diameter) to form a film, and vacuum-dried at room temperature overnight. Before use, swell with deionized water for 30 min, then pour the deionized water, and wash the membrane 3 times with water, and finally use filter paper to absorb the moisture on the surface of the membrane for use. The permeability of the membrane was tested under a certain pressure difference (vacuum degree≤0.8 MPa). Including the concentration of gelatin solution, the type of porogen, ...

Embodiment 2

[0032] Example 2: Ionic liquid [C 4 mim][BF 4 ]@Preparation of gelatin composite films

[0033] The gelatin aqueous solution with a mass fraction of 8%, a polyacrylamide aqueous solution with a mass fraction of 5%, and the inclusion complex of ionic liquid and β-cyclodextrin (n ILs : n β-CD =1:1), with the ratio as m 明胶 : m 致孔剂 : m β-CD-IL =8:2:0.3 at 40 o Fully stirred at C for 1 h, poured 1 mL of the casting solution into a Buchner funnel with a nylon filter membrane (50 mm in diameter) to form a film, and vacuum-dried at room temperature overnight. The resulting film had an average thickness of 0.1 mm.

Embodiment 3

[0034] Example 3: Ionic liquid [C 4 mim][NTf 2 ]@Preparation of gelatin composite films

[0035] The gelatin aqueous solution with a mass fraction of 8%, a polyacrylamide aqueous solution with a mass fraction of 5%, and the inclusion complex of ionic liquid and β-cyclodextrin (n ILs : n β-CD =1:1), with the ratio as m 明胶 : m 致孔剂 : m β-CD-IL =8:2:1 at 40 o Fully stirred at C for 1 h, cooled to room temperature, poured 1 mL of the casting solution onto a Buchner funnel with a nylon filter membrane (50 mm in diameter), and vacuum-dried overnight at room temperature. The resulting film had an average thickness of 0.2 mm.

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Abstract

The invention prepares a new ionic liquid-gelatin composite membrane. For the first time, the ionic liquid cyclodextrin inclusion complex, gelatin solution and porogen were blended by a simple physical method to prepare a casting solution, which was then naturally flowed and vacuum-dried to form a film. The membrane has relatively ideal homogeneity, permeability, stability and mechanical strength, and combines the original functions of catalysis, separation and gelatin porous layer filtration of the ionic liquid. This technology enriches the types of functional membrane materials, expands the existing ionic liquid immobilization process and its application form; the molding process is convenient and effective, and the membrane is easy to scale up for preparation and recycling.

Description

technical field [0001] The invention relates to a preparation method of a functional ionic liquid-gelatin composite membrane, in particular to the preparation of a casting membrane liquid by blending a gelatin matrix, a porogen and a β-cyclodextrin inclusion compound of the ionic liquid by physical means, and then Natural casting and vacuum drying to form a film. The membrane combines the original catalysis, separation and gelatin porous layer filtration functions of the ionic liquid, and belongs to the field of functional membrane materials. Background technique [0002] As one of the natural renewable macromolecular substances, gelatin has a wide range of sources, low price, good film-forming properties and biodegradability. The amino, hydroxyl, carboxyl and other functional groups in the gelatin structure will produce intermolecular van der Waals forces, electrostatic attraction and hydrogen bonds, and the reactivity is high, which is conducive to its functionalization (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00B01J20/28B01J20/30B01J31/02C07C67/08C07C69/157
CPCB01D69/12B01D67/0079B01D67/0095B01J20/28033B01J20/28054B01J31/0292B01J31/0284C07C67/08B01D2323/12B01D2323/50B01D2323/10B01D2323/08B01J2231/49B01J35/59C07C69/157
Inventor 姚舜张腾鹤宋航
Owner SICHUAN UNIV
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