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Preparation method of polyaniline nanofiber with high draw ratio

A technology of nanofibers and high aspect ratio, which is applied in the field of preparation of polyaniline nanofibers, can solve the problems of complex preparation methods, harsh synthesis conditions, and small aspect ratios, and achieve good chemical stability, simple preparation methods, and simple Good dispersion effect

Active Publication Date: 2014-12-17
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, hard template method, soft template self-assembly method, template-free self-assembly method, solid grinding method, microwave radiation method, interfacial polymerization method, dilute solution polymerization method, cryogenic gel method, "seed" polymerization method, electrospinning method Such methods are common methods for preparing polyaniline nanofibers, but the polyaniline nanofibers formed by these methods either have short fiber length, large diameter, small aspect ratio and many dendritic branches, etc., or the synthesis conditions are harsh and the preparation method is complicated. Not conducive to the preparation of polyaniline nanofibers

Method used

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  • Preparation method of polyaniline nanofiber with high draw ratio
  • Preparation method of polyaniline nanofiber with high draw ratio
  • Preparation method of polyaniline nanofiber with high draw ratio

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: in 100mL round bottom flask, add 0.50mol / L hydrochloric acid solution 90mL; With 10mg Fe 3 o 4 Add microspheres and 0.050mL aniline monomer into the reactor; ultrasonicate until uniform; quickly add 10mL of 0.50mol / L hydrochloric acid solution dissolved with 91.05mg APS into the reaction vessel, and polymerize at 20°C for 8h; Carry out magnetic separation, pour off the supernatant, add absolute ethanol for multiple washings to remove unreacted monomers and by-products, and then carry out magnetic separation; vacuum dry at room temperature to obtain PANI nanofibers.

Embodiment 2

[0024] Embodiment 2: in 100mL round bottom flask, add 0.5mol / L hydrochloric acid solution 90mL; 10mg Fe 3 o 4 Add microspheres and 0.20mL aniline monomer into the reactor; ultrasonicate until uniform; place a flat magnet with a magnetic field strength of 400Gs 5cm away from the reactor; quickly add 10mL 0.50mol / L hydrochloric acid solution with 364.2mg APS into a reaction vessel, polymerized at 20°C for 8 hours; magnetically separated the obtained product, poured off the supernatant, added absolute ethanol for multiple washes to remove unreacted monomers and by-products, and then carried out magnetic separation; vacuum drying at room temperature to obtain PANI nanofibers.

Embodiment 3

[0025] Embodiment 3: in 100mL round bottom flask, add 1.0mol / L hydrochloric acid solution 90mL; 10mg Fe 3 o 4 Add microspheres and 0.40mL aniline monomer into the reactor; ultrasonicate until uniform; place a flat magnet with a magnetic field strength of 400Gs 5cm away from the reactor; quickly add 10mL of 0.50mol / L hydrochloric acid solution containing 728.4mg APS into a reaction vessel, polymerized at 20°C for 8 hours; magnetically separated the obtained product, poured off the supernatant, added absolute ethanol for multiple washes to remove unreacted monomers and by-products, and then carried out magnetic separation; vacuum drying at room temperature to obtain PANI nanofibers.

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Abstract

The invention relates to a preparation method of a polyaniline nanofiber with a high draw ratio. The method achieves a research on processes of synthesizing polyaniline by polymerizing aniline. According to the method, aniline is firstly reacted through homogeneous nucleation under various reaction conditions to obtain various shapes with various variations, and then the aniline is continuously reacted through homogeneous nucleation to achieve secondary growth. On the basis of the research, magnetic microballons are induced as a heterogeneous interface during polymerization of the aniline, so that the polymerization modes of the aniline can be changed; heterogeneous nucleation of aniline monomers occurs on the surfaces of the microballons and further homogenous nucleation occurs, and by controlling the reaction conditions, the polyaniline nanofiber can be obtained.

Description

technical field [0001] The invention relates to a method for preparing polyaniline nanofibers with a high aspect ratio, in particular to introducing magnetic microspheres during the synthesis of polyaniline so that aniline monomers first undergo heterogeneous nucleation reactions, and then homogeneous nucleation reactions occur. Nuclear reaction, polyaniline nanofibers with high aspect ratio were obtained. Background technique [0002] The conductive polymer polyaniline has the characteristics of simple preparation method, good chemical stability and unique proton acid doping and dedoping (not involving electron gain and loss), and is widely used in electron transport, sensors, electrochromic materials, anti-corrosion Corrosive coatings, microwave absorption and electromagnetic shielding materials and other fields. Synthesizing polyaniline nanofibers with a high aspect ratio from aniline monomers to maximize the electrical conductivity of polyaniline has become a hot topic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G73/02C08K3/22
Inventor 张秋禹马勇乔明涛张合鹏
Owner NORTHWESTERN POLYTECHNICAL UNIV