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Ionic type polyimine network material and preparation method thereof

An ionic, polyimide technology, applied in the production of bulk chemicals, can solve the problems of difficult and flexible electronic equipment, poor self-healing performance, etc., and achieve the effects of good electrical conductivity, easy preparation, and rapid self-healing

Active Publication Date: 2022-01-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned new materials based on the polyimide network skeleton are not conductive, so it is difficult to be directly used in the preparation of flexible electronic devices, and their self-healing properties are mainly based on the dynamic covalent chemistry of imine bonds, and dynamic covalent chemistry is a Slow process, so its short-term (within 10 minutes) self-healing performance is poor

Method used

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  • Ionic type polyimine network material and preparation method thereof
  • Ionic type polyimine network material and preparation method thereof
  • Ionic type polyimine network material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of ionic polyimide network material, concrete steps are as follows:

[0045] (1) Add 0.2 mmol of 1-ethyl-3-methylimidazolium lysine salt ([Emim][Lys]) (refer to the preparation method Room temperature ionic liquids from 20natural amino acids. J Am ChemSoc.2005Mar 2; 127 (8): 2398-9, the following examples can adopt similar method) to be dissolved in the middle of 2mL methanol solution, the tris (2-aminoethyl) amine of 0.4mmol is dissolved in the middle of the ethanol solution of 4mL, then two kinds Mix the amine solutions, and ultrasonicate at 60°C for 2 minutes under the ultrasonic power of 2000W to obtain a uniform, clear and transparent mixed amine solution;

[0046] (2) Another 0.8 mmol of terephthalaldehyde was dissolved in a mixed solution of 0.3 mL of dichloromethane and 1.8 mL of ethanol, and ultrasonicated at 45°C for 15 min under an ultrasonic power of 2000 W to obtain a clear light yellow aldehyde solution;

[0047] (3) Mix the a...

Embodiment 2

[0051] A preparation method of ionic polyimide network material is basically the same as that of Example 1, the difference is that:

[0052] In step (1), 1-ethyl-3-methylimidazolium 2,3-diaminopropionate is used as the amino acid derivative ionic liquid.

[0053] The ionic polyimide network material obtained in this embodiment is measured by a conductivity meter, and the obtained conductivity is 48.8mS cm -1 .

[0054]

Embodiment 3

[0056] A preparation method of ionic polyimide network material is basically the same as that of Example 1, the difference is that:

[0057] In step (1), 1-ethyl-3-methylimidazolium 2,10-diaminodecanoate is used as the amino acid derivative ionic liquid.

[0058] The ionic polyimide network material obtained in this embodiment is measured by a conductivity meter, and the obtained conductivity is 37.9mS cm -1 .

[0059]

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Abstract

The invention discloses an ionic polyimine network material and a preparation method thereof, wherein the material is an ionic network material which is formed by a polyaldehyde compound, a ternary amine cross-linking agent and amino acid ionic liquid or amino acid derivative ionic liquid through a Schiff base reaction and takes an imine bond as a link mode. The preparation method comprises the following steps: adding amino acid ionic liquid or amino acid derivative ionic liquid into a polar solvent I, adding a ternary amine cross-linking agent into a polar solvent II, and carrying out ultrasonic treatment to obtain a mixed amine solution; adding a polyaldehyde compound into a polar solvent III, and carrying out ultrasonic treatment to obtain an aldehyde solution; mixing the mixed amine solution and the aldehyde solution and adding the mixture into a mold, performing ultrasonic treatment, volatilizing a solvent at the temperature of 15-120 DEG C, after the solvent is volatilized, and subjecting the obtained material to a hot pressing process to produce the ionic type polyimine network material. According to the ionic type polyimine network material, anions and cations are introduced through block copolymerization, so that the conductivity of the ionic type polyimine membrane material is achieved.

Description

technical field [0001] The invention relates to a polyimide material, in particular to an ionic polyimide network material and a preparation method thereof. Background technique [0002] After the industrial revolution in the 20th century, the petrochemical-based polymer synthesis chemical industry flourished. Nowadays, all kinds of lightweight, cheap and high-performance polymer materials have been widely used in various industries, bringing unprecedented convenience to our life. However, the stronger and more durable polymers are, the stronger their chemical stability means that they are more difficult to degrade in the natural environment. This kind of "white pollution" is so harmful to the human living environment that it is urgent to develop new recyclable polymer materials. [0003] The Schiff base reaction is a dynamic covalent chemical reaction for the preparation of imines (-CH=N-) compounds, usually formed by condensation of amines, hydrazides, hydrazines and ald...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G12/06C08G12/08C08G12/14C08G12/22
CPCC08G12/06C08G12/08C08G12/14C08G12/22Y02P20/54
Inventor 陶国宏张国浩朱秋红张磊何玲
Owner SICHUAN UNIV
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