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Polyionic liquid type acid indicator suitable for non-polar solvent and its preparation

A technology of polyionic liquids and non-polar solvents, which is applied in the direction of material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions, etc., to achieve simple synthesis, good reaction controllability, and good thermal stability. The effect of stability

Active Publication Date: 2017-01-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the research on polyionic liquid acidic indicators is still in the stage of continuous development, so far, polyionic liquid acidic indicators specially suitable for non-polar solvents have not been reported.

Method used

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  • Polyionic liquid type acid indicator suitable for non-polar solvent and its preparation

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Effect test

Embodiment 1

[0043] A polyionic liquid acid indicator suitable for non-polar solvents, its structural formula is shown in formula (3), wherein, n is 22.

[0044] The preparation method of the above-mentioned polyionic liquid type alkaline indicator suitable for non-polar solvents is:

[0045] Step a: Carry out water and oxygen removal treatment on a 150 ml three-necked flask. The water and oxygen removal treatment is as follows: fully dry the clean 150 ml three-necked flask at 90 degrees Celsius for 3 hours, take it out and cool it to room temperature, and inject nitrogen gas ;

[0046] Step b: under nitrogen protection, add 29.60 g of phthalic anhydride and 50 ml of N,N-dimethylformamide into the three-necked flask, and stir to form a uniform solution;

[0047] Step c: Add 0.13 grams of ethylene glycol (accounting for 1% by mole of phthalic anhydride) to the solution obtained in step b under nitrogen protection, and stir;

[0048] Step d: add 18.50 g of epichlorohydrin to the solution o...

Embodiment 2

[0054] A polyionic liquid type acid indicator suitable for non-polar solvents, its structural formula is shown in formula (3), wherein, n is 17.

[0055] The preparation method of the above-mentioned polyionic liquid type alkaline indicator suitable for non-polar solvents is:

[0056] Step a: Carry out water and oxygen removal treatment on a 150 ml three-necked flask. The water and oxygen removal treatment is as follows: fully dry the clean 150 ml three-necked flask at 90 degrees Celsius for 3 hours, take it out and cool it to room temperature, and inject nitrogen gas ;

[0057] Step b: under nitrogen protection, add 28.00 g of phthalic anhydride and 50 ml of N,N-dimethylformamide into a three-necked flask, and stir to form a uniform solution;

[0058] Step c: add 0.15 grams of ethylene glycol (accounting for 1.2% mole percent of phthalic anhydride) to the solution obtained in step b under nitrogen protection, and stir;

[0059] Step d: add 17.50 g of epichlorohydrin to the ...

Embodiment 3

[0065] A polyionic liquid type acid indicator suitable for non-polar solvents, its structural formula is shown in formula (3), wherein, n is 24.

[0066] The preparation method of the above-mentioned polyionic liquid type alkaline indicator suitable for non-polar solvents is:

[0067] Step a: Carry out water and oxygen removal treatment on a 150 ml three-necked flask. The water and oxygen removal treatment is as follows: fully dry the clean 150 ml three-necked flask at 90 degrees Celsius for 3 hours, take it out and cool it to room temperature, and inject nitrogen gas ;

[0068] Step b: under nitrogen protection, add 25.50 g of phthalic anhydride and 50 ml of N,N-dimethylformamide into a three-necked flask, and stir to form a uniform solution;

[0069] Step c: add 0.2 grams of ethylene glycol (accounting for 1.8% by mole of phthalic anhydride) to the solution obtained in step b under nitrogen protection, and stir;

[0070] Step d: Add 15.90 g of epichlorohydrin to the soluti...

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Abstract

The invention provides a polyion liquid acidic indicator suitable for non-polar solvent and a preparation method thereof. The preparation method includes the steps that ethylene glycol is added into an N,N-dimethylformamide solution of phthalic anhydride under the protection of nitrogen to be stirred; epoxy chloropropane is added to be reacted under the condition of stirring; N-methylimidazole is added to be reacted under the condition of stirring; the reaction product is added into acetone to be stirred and settled; obtained sediment is dissolved in deionized water and dropwisely added to a methyl orange aqueous solution, and reacting is carried out under the condition of stirring to be settled; the obtained sediment is washed by deionized water repeatedly, vacuum drying is carried out, and accordingly the polyion liquid acidic indicator suitable for the non-polar solvent is obtained. Considering that the polyion liquid acidic indicator has good solubility and obvious acidic indicating behaviors in the non-polar solvent, the polymer can be used in the acidic indicating field of the non-polar solvent.

Description

technical field [0001] The invention relates to an acid indicator in the technical field of chemical industry, in particular to a preparation method of a polyionic liquid indicator with an acid indicator function in a non-polar solvent. Background technique [0002] An ionic liquid is an ionic compound that is liquid at or near room temperature. Since ionic liquids were first reported 100 years ago, the application of ionic liquids has covered many fields, such as fine chemical industry, separation and purification, electrochemistry, solar cells, biomedicine and so on. In recent years, polyionic liquids developed from ionic liquids have attracted great attention in the fields of polymer chemistry and materials science. Polyionic liquids are polymers with anionic and cationic electrolyte groups on repeating units. Polyionic liquid has the excellent characteristics of ionic liquid, such as low melting point, low vapor pressure, good conductivity, good stability, recyclabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C08G63/682G01N21/80
Inventor 夏于旻罗斌赵华蕾沈佳豪王燕萍
Owner DONGHUA UNIV
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