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Method for preparing nano-structure aniline-co-pyrrole copolymer microsphere

A pyrrole copolymer and nanostructure technology, which is applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of complex post-processing procedures, impure polymers, difficult industrial production, etc. Processing difficulties, simple operation effect

Inactive Publication Date: 2010-04-07
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome and solve the need for additional templates or a large amount of additives (emulsifier or stabilizer), the obtained polymer is not pure, the post-treatment process is complicated, and the existing polymerization methods for preparing nanostructure conductive polymer microspheres exist. Solvent pollutes the environment, it is difficult to industrialize production and other shortcomings and problems. The research provides a method for the preparation of polymer microspheres with high efficiency, simple process, pure product and environment-friendly. This method is a method without external templates or additives such as Method for preparing aniline-pyrrole copolymer microspheres under conditions such as emulsifier or dispersant

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  • Method for preparing nano-structure aniline-co-pyrrole copolymer microsphere

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preparation example Construction

[0013] The concrete steps of preparation method are:

[0014] (1) Preparation of monomer solution: Add monomer aniline or N-ethylaniline and comonomer pyrrole into the reaction medium solution, stir to fully dissolve it to form a monomer solution, and then put it in a reaction water bath to keep the temperature until the reaction temperature, the reaction temperature is from 0 to 50°C;

[0015] (2) Preparation of oxidant solution: add oxidant to the same reaction medium solution as in step (1), stir to make it fully dissolve to form oxidant solution, and then put it in a reaction water bath to keep the temperature to the reaction temperature, and the reaction temperature is 0 to 50°C ;

[0016] (3) mixed solution, polymerization reaction: adding the oxidant solution of the step (2) dropwise into the monomer solution of the step (1) to initiate the polymerization reaction;

[0017] (4) Continue the reaction: after the oxidant is added dropwise, continue the reaction under sta...

Embodiment 1

[0032] Measure 4.5mmol aniline and 0.5mmol pyrrole, put them in a dry and clean beaker, add 0.1mol L -1 Aqueous NaOH solution (initial pH 13.01) was stirred in an ice-water bath at 0°C for 0.5 h to obtain a monomer mixture. Another weighed 5mmol ammonium persulfate was dissolved in 0.1mol L -1 NaOH aqueous solution was stirred in an ice-water bath at 0°C for 0.5 h until it was completely dissolved, and a colorless transparent solution was obtained. Add the ammonium persulfate aqueous solution dropwise to the monomer mixture above at a rate of 1 drop per second under static conditions. After the dropwise addition, the reaction was continued until 24h. After the reaction was completed, 2 mL of the reaction solution was taken for centrifugal washing, and the sample was used for polymer morphology testing. The remaining reaction solution was filtered, and the filter cake was dried at 60° C. for 7 days to obtain copolymer powder with a polymerization yield of 74% and an electr...

Embodiment 2

[0035] Measure 4.5mmol aniline and 0.5mmol pyrrole, put them in a dry and clean beaker, add 0.2mol L -1 Ammonia solution (initial pH value 11.08) was stirred in an ice-water bath at 0°C for 0.5 h to obtain a monomer mixture. Another weighed 5mmol ammonium persulfate was dissolved in 0.1mol L -1 Ammonia solution was stirred in an ice-water bath at 0°C for 0.5 h until it was completely dissolved, and a colorless transparent solution was obtained. Add the ammonium persulfate aqueous solution dropwise to the monomer mixture above at a rate of 1 drop per second under static conditions. After the dropwise addition, the reaction was continued to 72h. After the reaction was completed, 2 mL of the reaction solution was taken for centrifugal washing, and the sample was used for polymer morphology testing. Filter the remaining reaction solution, and dry the filter cake at 60°C for 7 days to obtain a copolymer powder with a polymerization yield of 65% and an electrical conductivity of ...

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Abstract

The invention provides a method for preparing nano-structure aniline-co-pyrrole copolymer microsphere, belongs to the technical field of high polymer materials, and solves the problems of impure obtained polymer, complicated post-processing process, environmental pollution of the used solvent, difficult industrial production and the like in the prior polymerizing method for preparing the nano-structure conductive polymer microsphere produces due to the adding of an extra template or massive additives. The copolymer is prepared by changing medium types of polymerization, selecting aniline or N-ethyl aniline and pyrrole as monomers and implementing a static chemical oxidation polymerization method. The method can prepare copolymer microspheres of between 400 nanometers and 4.4 microns. The method has the characteristics of simple operation, high yield and low cost. The prepared copolymer microspheres have excellent characteristics of nano materials. Furthermore, as an aqueous system, the method, which avoids organic solvent, is a green method for synthesizing the copolymer microspheres. The invention provides a new approach for preparation of the nano-structure polymer microspheres.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer nanomaterials, and more specifically relates to a preparation method of nanostructured aniline-pyrrole copolymer microspheres. Background technique [0002] Conductive polymers such as polyaniline, polypyrrole and their derivatives have large p-bond conjugated electron backbone structures and unique electrical, magnetic, optical, and electrochemical properties, which will endow them with remarkable electrical conductance, photoconductivity, and separation properties , adsorption and other functions. Nano-microstructures (such as nanofibers, nanotubes, nanowires and nano-microspheres, etc.) polyaniline and polypyrrole are expected to be used as solar cells, new rechargeable battery electrodes, Supercapacitor materials, sensors, metal anti-corrosion coatings, adsorbents for harmful heavy metal ions in polluted wastewater, anti-static materials, etc., have increasingly rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14C08G73/06
Inventor 吕秋丰
Owner FUZHOU UNIV
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