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Method for preparing nano-stage naphthylamine sulfonate and aniline copolymer

A technology of aniline copolymer and naphthylamine sulfonate, applied in the field of preparing nano-scale naphthylamine sulfonate and aniline copolymer, achieving good yield and universal applicability

Inactive Publication Date: 2008-09-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the nanoscale research of polyaniline needs to be further deepened.

Method used

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  • Method for preparing nano-stage naphthylamine sulfonate and aniline copolymer
  • Method for preparing nano-stage naphthylamine sulfonate and aniline copolymer
  • Method for preparing nano-stage naphthylamine sulfonate and aniline copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 0.0893g (0.4mmol) of 7-sulfonic acid-1-naphthylamine to 20mL aqueous solution containing equimolar NaOH (0.4mmol), and then add 0.328mL (3.6mmol) of aniline after complete dissolution, at 20°C Rapid magnetic stirring in a constant temperature water bath for 30 min. Then, 20 mL of aqueous solution dissolved with 1.3692 g (6 mmol) of ammonium persulfate was slowly dropped into the monomer solution at a speed of 3 seconds / drop, and it took 20 minutes to complete the drop. After a few drops of the oxidant were added, the reaction solution changed from light red to wine red, then dark red and gradually deepened, and gray-black particles were formed after 15 minutes. After 20 minutes, the oxidant was added dropwise, and the reaction was continued for 48 hours in a constant temperature water bath at 20°C. After the reaction, the reaction solution was a black opaque system, and 1 mL of the stock solution was taken into a vial for particle size analysis. The rest of the so...

Embodiment 2～6

[0034] The following examples will illustrate the effect of different monomer molar ratios on the polymerization yield and polymer size in the present invention.

[0035] Repeat Example 1, but change the molar ratio of aniline and 7-sulfonic acid-1-naphthylamine so that the molar ratio of aniline and 7-sulfonic acid-1-naphthylamine is 65:35, 70:30, 95:5, 98:2, 100:0, the yields of the obtained polymers were 57.9wt%, 60.7%, 104.9wt%, 105.7%, 104.0wt%, respectively. Analyzed by a laser particle size analyzer, the average particle diameters of the obtained polymers were 121 nm, 68 nm, 151 nm, 2.7 μm, and 3.93 μm, respectively. And the SEM and TEM characterization results are as follows figure 1 , figure 2 , image 3 As shown, the morphologies of the polymers are shown as nanoblocks, nanorods, and nanoparticles, respectively. The cross-sectional diameter of the nanorods is about 31-63 nm.

Embodiment 7～9

[0037] The following examples will illustrate the effect of different oxygen ratios on the polymerization yield and polymer size in the present invention.

[0038]Repeat Example 1, and the reaction time is shortened to 24h. When changing the amount of oxidizing agent added, the ratio of oxidizing agent to monomer is 0.5:1, 1:1, 1.25:1, and the yields of polymer obtained are respectively 16.4wt%, 61.6wt%, 82.7wt%. Analyzed by a laser particle size analyzer, the average particle diameters of the obtained polymers were 309 nm, 162 nm, and 2.696 μm, respectively.

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Abstract

The invention discloses a method for preparing nano sulfonic acid naphthylamine and aniline copolymer. The method is characterized in that: the neutral aqueous solution in sodium sulfonate naphthylamine is added in aniline aqueous solution and fully dissolved; then, oxidizing agent is added; when the reaction is finished, filtration, collection, precipitation, cleaning and drying are carried out to complete the preparation.

Description

technical field [0001] The invention relates to a method for preparing nano-level sulfonic acid naphthylamine and aniline copolymer. Background technique [0002] As a conjugated conductive polymer material, nano-polyaniline has a wide range of controllable conductivity and good doping-dedoping reversibility endowed with unique electrochemical properties, so it is widely used in biosensors, antistatic, anti- Electromagnetic radiation coatings, electrode catalytic active materials, heavy metal adsorbents and other fields. [0003] The methods for preparing polyaniline nanomaterials generally include chemical oxidation and electrochemical methods. The use of chemical oxidation methods such as emulsion polymerization, dispersion polymerization, etc., to prepare nano-polyaniline has the advantages of being simple, easy, and large-scale production, so it is widely used. When using emulsion polymerization to synthesize polyaniline nanoemulsion particles or nanofibers, it is nece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02
Inventor 李新贵韦霏黄美荣
Owner TONGJI UNIV
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