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Cationic nitrile cross-linking reaction and method for preparing polyelectrolyte membrane

A technology of cross-linking reaction and polyelectrolyte, which is applied in the field of cationic nitrile cross-linking reaction and preparation of polyelectrolyte membrane, and achieves good stability and improved stability

Active Publication Date: 2020-09-22
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although symmetrical 1,3,5-triazine compounds are very famous substances, there are many very difficult difficulties to directly synthesize derivatives of triazine compounds with different functional groups on each carbon atom

Method used

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  • Cationic nitrile cross-linking reaction and method for preparing polyelectrolyte membrane
  • Cationic nitrile cross-linking reaction and method for preparing polyelectrolyte membrane
  • Cationic nitrile cross-linking reaction and method for preparing polyelectrolyte membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The synthetic method of triazine compound among the present invention comprises the following steps:

[0053] (1) Dissolve polyvinyl acetonitrile pyridinium cationic bromide in DMSO solvent, and prepare a 0.5wt‰ casting solution.

[0054] (2) Put the prepared 400 μL polyvinyl acetonitrile pyridinium cationic bromide casting solution drop by drop on the glass slide, and put it in an oven at 80°C for 2 hours.

[0055] (3) The dried glass sheet is placed in an ammonia gas atmosphere formed by 0.2 wt% ammonia water at 10° C., and sealed for 8 hours.

[0056] (4) Take out the glass sheet, place it in a watch glass filled with clear water, press down on a corner of the glass sheet slightly, and the film will be separated from the glass bottom sheet to obtain an ultra-thin film with a film thickness of about 19nm.

Embodiment 2

[0058] The synthetic method of triazine compound among the present invention comprises the following steps:

[0059] (1) Dissolve polyvinyl acetonitrile pyridinium cationic bromide in DMSO solvent, and prepare a 0.5wt‰ casting solution.

[0060] (2) Put the prepared 400 μL polyvinyl acetonitrile pyridinium cationic bromide casting solution drop by drop on the glass slide, and put it in an oven at 80°C for 2 hours.

[0061] (3) The dried glass sheet is placed in an ammonia gas atmosphere formed by 0.2 wt% ammonia water at 50° C., and sealed for 8 hours.

[0062] (4) Take out the glass sheet, place it in a watch glass filled with clear water, press down on a corner of the glass sheet slightly, and the film will be separated from the glass bottom sheet to obtain an ultra-thin film with a film thickness of about 21nm.

Embodiment 3

[0064] The synthetic method of triazine compound among the present invention comprises the following steps:

[0065] (1) Dissolve polyvinyl acetonitrile pyridinium cationic bromide in DMSO solvent, and prepare a 0.5wt‰ casting solution.

[0066] (2) Put the prepared 400 μL polyvinyl acetonitrile pyridinium cationic bromide casting solution drop by drop on the glass slide, and put it in an oven at 80°C for 2 hours.

[0067] (3) The dried glass sheet is placed in an ammonia gas atmosphere formed by 14wt% ammonia water at 50° C., and sealed for 8 hours.

[0068] (4) Take out the glass sheet, place it in a watch glass filled with clear water, press down on a corner of the glass sheet slightly, and the film will be separated from the glass bottom sheet to obtain an ultra-thin film with a film thickness of about 22nm.

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Abstract

The invention belongs to the field of high-molecular polymers, and discloses a cationic nitrile cross-linking reaction and a method for preparing a polyelectrolyte membrane under mild conditions. Thecationic nitrile cross-linking method is characterized in that a cationic cyano polyelectrolyte is used as a raw material, and a triazine ring compound is formed based on the reaction of cyano cross-linking into a triazine ring; wherein the reaction is carried out under a mild condition of 10-50 DEG C and in an atmosphere of ammonia gas or volatile organic amine. According to the invention, the overall flow process design of the preparation method is improved; the cationic cyano polyelectrolyte is adopted as a raw material, cyano crosslinking can be utilized to form a triazine ring reaction under mild and simple conditions, particularly, a membrane can be prepared, and compared with the prior art, the problems that existing triazine ring synthesis conditions are harsh, triazine ring synthesis is difficult to apply and the like can be effectively solved. According to the invention, the triazine high-molecular compound is synthesized under mild and simple synthesis conditions by utilizing the universal structure of the polyelectrolyte high-molecular compound.

Description

technical field [0001] The invention belongs to the field of high molecular polymers, and more specifically relates to a cationic nitrile crosslinking reaction and a method for preparing a polyelectrolyte membrane. The method uses a cyanopolyelectrolyte to crosslink into a triazine ring compound under mild conditions. Preparation of film is especially suitable for preparation of ultra-thin film, that is, under mild conditions, cationic cyanopolyelectrolyte cross-linked into triazine ring compound reaction (ie cationic nitrile type cross-linking reaction) to prepare ultra-thin film method. Background technique [0002] Triazines are one of the compounds with six-membered rings containing three nitrogen atoms in an alternating sequence of carbon atoms. 1,3,5-Triazine derivatives play an important role in organic chemistry, and their application fields involve pharmaceutical industry, textile industry, plastic industry, rubber industry, etc. At present, triazine compounds can ...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08J5/18C08L39/04
CPCC08J3/24C08J5/18C08J2339/04
Inventor 赵强董志月张重锐
Owner HUAZHONG UNIV OF SCI & TECH
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