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Chemical oxidation preparation method for novel N-substituted carboxyl polyaniline

A technology of chemical oxidation and polyaniline, which is applied in the field of chemical oxidation preparation of N-substituted carboxylic acid polyaniline, can solve the problems that the conductivity of polyaniline is greatly affected, the conductivity of polyaniline drops greatly, and it is not conducive to the application of polyaniline. Good Yield and Universal Applicability, Improved Solubility, Effect of High Conductivity

Inactive Publication Date: 2013-07-24
EAST CHINA JIAOTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more common improvement method should be chemical modification. The solubility of polyaniline is improved by introducing hydrophilic groups on the aromatic ring through chemical modification. Applications in electronic equipment
In the chemical modification method, there is another method to improve the solubility of the polymer by substituting the imine on the polyaniline chain. The study found that the solubility of this type of modified polymer in different solvents is related to the nature of the substituent, and the hydrophobic substitution The base can be dissolved in organic solvents, and the hydrophilicity can be dissolved in common polar solvents, and the thermal stability of the polymer is greatly improved after the imine hydrogen is replaced, but the conductivity of polyaniline modified by this method is between 10 -7 -10 -3 S / cm, compared with the conductivity of unmodified polyaniline, the decrease is larger

Method used

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  • Chemical oxidation preparation method for novel N-substituted carboxyl polyaniline
  • Chemical oxidation preparation method for novel N-substituted carboxyl polyaniline
  • Chemical oxidation preparation method for novel N-substituted carboxyl polyaniline

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Embodiment 1

[0033] This embodiment will illustrate that the N-substituted carboxylic acid polyaniline of the present invention is in the inorganic protic acid aqueous solution, using ammonium persulfate as the oxidizing agent, the molar ratio of the oxidizing agent and the monomer is 1:1, and is realized according to the chemical oxidation polymerization reaction path .

[0034]Dissolve 4.535g (0.03mol) of N-substituted naphthylglycine monomer in 100mL of acetonitrile / water (1:1) mixed solution, and sonicate for 3 to 5 minutes to promote its dissolution. Dissolve 6.84g (0.03mol) of oxidant ammonium persulfate in 50mL of HCl solution with a concentration of 6.0mol / L as the oxidant solution. The acetonitrile aqueous solution in which the monomer was dissolved was kept at a temperature of 20°C, and after stirring for about 20 minutes, the oxidant was slowly added dropwise. After the dropwise addition was completed, the reaction was continued for 24 hours, the reaction was stopped, and the c...

Embodiment 2

[0038] This embodiment will illustrate that N-substituted carboxylic acid polyaniline of the present invention is in acetonitrile / water (1:1) hydrochloric acid solution, adopts ammonium persulfate as oxidizing agent, but the molar ratio of oxidizing agent / monomer is 0.5:1, according to It is realized by chemical oxidation polymerization reaction pathway.

[0039] Dissolve 4.535g (0.03mol) of N-substituted naphthylglycine monomer in 100mL of acetonitrile / water (1:1) mixed solution, and sonicate for 3 to 5 minutes to promote its dissolution. Dissolve 3.42 g (0.015 mol) of oxidant ammonium persulfate in 50 mL of HCl solution with a concentration of 6.0 mol / L as the oxidant solution. The acetonitrile solution in which the monomer was dissolved was kept at a temperature of 20°C, and after stirring for about 20 minutes, the oxidizing agent was slowly added dropwise. After the dropwise addition was completed, the reaction was continued for 24 hours, the reaction was stopped, and the...

Embodiment 3

[0043] Repeat Example 1, but change the protic acid medium to HNO 3 , The yield of the obtained polymer was 76.3wt%. The conductivity is 1.49×10 -1 S / cm.

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Abstract

The invention discloses a chemical oxidation preparation method for novel N-substituted carboxyl polyaniline. According to the method, the N-substituted carboxyl polyaniline polymer is prepared through a chemical oxidation method by taking N-phenylglycine as a monomer, and the method comprises the following steps: dissolving a certain amount of N-phenylglycine (N-AN) monomer in a mixed solution of acetonitrile and water in a certain volume; dissolving a certain amount of oxidant ammonium persulfate (NH4)3S2O3 in a prepared hydrochloric acid aqueous solution in a certain size; and slowly dripping the solution dissolved with the oxidant ammonium persulfate into a monomer, so that the monomer is completely reacted, and treating to obtain the N-substituted carboxyl polyaniline powder. The polymer prepared by the method has the yield of 89 weight percent and the electric conductivity of 1.5*10<-1>S / cm, and the N-substituted carboxyl polyaniline has excellent dissolving performance. The obtained polymer powder can be applied to conductive high polymer materials in the fields of secondary batteries, sensors, solar cells and the like.

Description

technical field [0001] The invention relates to a chemical oxidation preparation method of N-substituted carboxylic acid polyaniline, which belongs to the technical field of conductive polymer materials. Background technique [0002] Polyaniline is a widely studied conducting polymer due to its environmental stability, facile preparation, and superior optoelectronic properties. Because polyaniline can adjust the conductive properties through doping and dedoping processes, it is widely used in electrochromism, electrocatalysis, light emitting diodes, sensors, etc. However, these applications are limited by its insolubility and difficulty in processing. Therefore, under the premise of not affecting or affecting the electrical properties of polyaniline as little as possible, a modified polyaniline that can be dissolved in most solvents, even water, has very important practical significance. [0003] In order to improve the solubility of polyaniline, researchers at home and ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02
Inventor 章家立陈爱喜杨绍明王浩高键
Owner EAST CHINA JIAOTONG UNIVERSITY
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