Ph responsive polyion liquid composite membrane and preparation method thereof

A technology of polyionic liquids and composite membranes, applied in the field of polymer materials, can solve the problems of poor reusability, narrow pH response range, and inability to recycle, and achieve good reusability, short response time, and low electronic The effect of cloud density

Active Publication Date: 2015-02-04
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The response to pH in aqueous solution and non-aqueous solution can be realized as the color changes with different pH (see Analyst, 2011, 136, 1302-1304), expanding the range of solutions used by methyl red and methyl orange, but The reusability of this method is not good, and the pH response range is narrow
The traditional pH test paper also has the disadvantage that it can only be used once, so it is necessary to seek a simple and reusable method that responds to pH
[0003] The Chinese invention patent with publication number CN102408503A discloses a preparation method of polyglyceryl methacrylate with pH responsiveness, and p

Method used

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  • Ph responsive polyion liquid composite membrane and preparation method thereof
  • Ph responsive polyion liquid composite membrane and preparation method thereof
  • Ph responsive polyion liquid composite membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] This embodiment provides a method for preparing a pH-responsive polyionic liquid composite membrane, which includes the following steps in sequence:

[0027] (1) take 0.6g, 0.2g of acrylonitrile, 0.008g of benzoin ethyl ether, and 0.064g of divinylbenzene. Mix the above substances evenly with ultrasonic waves, apply them on a glass plate mold, and light for 40min to obtain a polyionic liquid composite film;

[0028] (2) Take a polyionic liquid composite membrane with a mass of 0.1 g and immerse it in 0.1062 g of a methyl orange aqueous solution with a concentration of 2 mg / mL for 40 min for anion exchange. - Converted to , washed repeatedly with ethanol to finally get the anion as pH-responsive polyionic liquid composite membrane.

Embodiment 2

[0030] This example provides a method for preparing a pH-responsive polyionic liquid composite membrane, which is roughly the same as that in Example 1, except that the polymeric imidazole monomer used is .

Embodiment 3

[0032] This example provides a method for preparing a pH-responsive polyionic liquid composite membrane, which is roughly the same as that in Example 1, except that the polymeric imidazole monomer used is .

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PUM

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Abstract

The invention relates to a preparation method of a pH responsive polyion liquid composite membrane. The preparation method comprises the following steps in sequence: (1) directly preparing a polyion liquid composite membrane through in situ polymerization after mixing a polymeric imidazole monomer, an acrylonitrile monomer, a crosslinking agent and an initiator; (2) performing ion exchange on the polyion liquid composite membrane in the step (1) and an anionic dye to obtain the pH responsive polyion liquid composite membrane, wherein the structural formula of the anionic dye is one of the structural formulas as shown in the specification. Control of responses of the polyion liquid composite membrane to different pH ranges can be achieved by adopting simple and direct anion exchange. The designed polyion liquid membrane is simple, has good reusability and is short in response time.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a polymer film, in particular to a pH-responsive polyionic liquid composite film and a preparation method thereof. Background technique [0002] In recent years, due to the advantages of ionic liquids such as zero vapor pressure, wide electrochemical window, high thermal stability, and high conductivity [Acc. Polyionic liquids have attracted more attention. By simply controlling the molecular structure of ionic liquids so that they have some polymerizable cations or anions and then polymerizing, polyionic liquids can be obtained. As a new type of functional material, polyionic liquids can be used as polymer electrolytes, catalysts, ion-conducting materials, CO 2 Adsorbents, microwave absorbing materials, etc. The so-called pH-responsive polymer material is a polymer material that can change in volume or shape due to changes in pH. Common pH polymer responsive materials contain a...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J5/18C08F220/34C08F220/48C08F212/36C08F212/32C08F2/48
Inventor 严锋郭江娜
Owner SUZHOU UNIV
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