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Ball-milling force-chemical synthesis method of polyaniline

A technology for chemical synthesis and polyaniline, applied in the field of polymer materials, can solve the problems of high price, limited types of polyaniline, limited sources of aniline salt monomers, etc., and achieves improved solubility and thermal stability, improved electrical conductivity, and reduced The effect of energy consumption

Inactive Publication Date: 2008-07-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
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Problems solved by technology

However, the conductivity of polyaniline prepared by Jiaxing Huang et al. is not good, and the conductivity of its powder compact is only 10 -2 S / cm order of magnitude
This method mainly has two deficiencies: one, the sources of aniline salt monomers are limited and expensive, and the types of dopants contained in the prepared polyaniline are limited; Necessary cooling measures allow the temperature of the reaction system to rise, which will have a serious negative impact on the synthesis and properties of polyaniline

Method used

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Embodiment Construction

[0028] The present invention is described in detail below in conjunction with embodiment, these embodiments are based on the premise of the technical solution of the present invention, have provided detailed implementation and specific operation process, but protection scope of the present invention is not limited to following embodiment.

[0029]In the following examples, the used aniline monomers are all purified by distillation. Adding aniline monomer, dopant, oxidant and balls into a ball mill for low-temperature ball milling, wherein the molar ratio of dopant to aniline monomer is 0.3-1.0, and the molar ratio of oxidant to aniline monomer is 0.2-2.0, The ball milling temperature is -196°C-0°C, the ball milling speed is 100 rpm-1000 rpm, and the ball milling time is 0.5 hours-10 hours. In some embodiments, a small amount of auxiliary solvent is also added, and the molar ratio of the added amount relative to the aniline monomer is 0.5-5.0.

[0030] After the ball milling, ...

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Abstract

The invention discloses a chemical synthesis method for polyaniline using ball milling, belonging to the technical field of macromolecular materials, which comprises the following steps: firstly, milling aniline monomers, dopants, and oxidants in a ball mill, initiating polymerization reaction, wherein, the molar ratio of the dopants and the aniline monomers is 0.2 to 2; secondly, washing, separating, and drying the products of the ball milling reaction, obtaining doped state polyaniline after removing oligomeric products and residual reactants; and thirdly, using alkali to detract doping to the doped state polyaniline, obtaining doping-polyaniline. The chemical synthesis method for polyaniline using ball milling has the advantages of easily available materials, wide adaptability, high efficiency, environment-friendly, and easy for mass production.

Description

technical field [0001] The present invention relates to a method in the technical field of polymer materials, in particular to a method for ball milling mechanochemical synthesis of polyaniline, that is, a method for preparing polyaniline by using ball milling to induce mechanochemical polymerization of aniline monomers. Background technique [0002] Among the intrinsically conductive polymer materials with conjugated structures, polyaniline is considered to be the most promising due to its structural diversity, unique doping mechanism, excellent physical and chemical properties, low raw material prices, and simple synthesis process. Conductive polymer materials can be used in almost all modern emerging industries and high-tech fields. However, so far, all polyaniline synthesis methods that have been adopted are carried out in the liquid phase, including chemical oxidation polymerization, electrochemical polymerization, air oxidation polymerization, template polymerization, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02
Inventor 李志强张荻朱申敏
Owner SHANGHAI JIAO TONG UNIV
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