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Production of polyaniline micro/nanometer fibre

A nanofiber, polyaniline technology, applied in the field of materials, can solve problems such as limiting large-scale applications, and achieve the effects of standardization of preparation and improvement of yield

Inactive Publication Date: 2009-06-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the yield of their synthesized nanofibrous PAni is only 6-10%, which limits its large-scale application to a certain extent.

Method used

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  • Production of polyaniline micro/nanometer fibre
  • Production of polyaniline micro/nanometer fibre
  • Production of polyaniline micro/nanometer fibre

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] attached Figure 7 Shown is a homemade nano (diameter) scale polyaniline fiber material.

[0023] The experiment of synthesizing nano-PAni fibers by oil / water two-phase interfacial polymerization is carried out in an immiscible two-phase system. Aniline purified by secondary distillation is dissolved in the organic phase, and the solvent used is CHCl 3 ; while the oxidizing agent (ammonium persulfate APS) and organic benzenesulfonic acid dopant (such as p-toluenesulfonic acid TSA, camphorsulfonic acid CSA, dodecylbenzenesulfonic acid DBSA, etc.) are dissolved in the water phase. Taking p-toluenesulfonic acid as an example, the synthesis conditions are as follows: add 100ml of CHCl containing 0.4mol / L aniline monomer to a 250ml separating funnel 3 100ml of 1mol / L p-toluenesulfonic acid aqueous solution containing 0.2mol / L oxidant APS was carefully added to the above organic phase ([APS] / [An]=1:2). Reaction at room temperature for 16h. Separate the orange-red organic m...

Embodiment 2

[0025] attached Figure 8-9 Shown is the morphology of the doped PAni-TSA product synthesized by the oil / water interface polymerization method.

[0026] In a 250ml separatory funnel (note: use a separatory funnel instead of a beaker in the literature as a reactor, which is more conducive to the separation and collection of products), add 100ml of CHCl containing 0.04mol of aniline monomer 3 , and then carefully add 100ml of 1mol / L TSA solution containing 9.2g oxidant APS to the above organic phase ([APS]:[An]=1:1), the upper layer is the water phase, and the lower layer is the oil phase. Reaction at room temperature for 16h. Separate the orange-red organic matter in the lower layer, wash the dark-green dispersion in the upper aqueous phase with a certain amount of distilled water and ethanol respectively, and dry it at 60°C to obtain a dark-green powder product, which is abbreviated as PAni-TSA, and placed in a vacuum Save the atmosphere. The PAni-TSA in the doped state was...

Embodiment 3

[0028] In a 250ml separatory funnel, add 100ml of CHCl containing 0.04mol aniline monomer 3 , and then carefully add 100ml of 1.5mol / L TSA solution containing 4.6g oxidant APS to the above organic phase ([APS] / [An]=1:2), the upper layer is the water phase, and the lower layer is the oil phase. Reaction at room temperature for 16h. Separate the orange-red organic matter in the lower layer, wash the dark-green dispersion in the upper aqueous phase with a certain amount of distilled water and ethanol respectively, and dry it at 60°C to obtain a dark-green powder product, which is abbreviated as PAni-TSA, and placed in a vacuum Save the atmosphere. Doped PAni-TSA was treated with 10% ammonia solution for 12 hours, filtered and washed until neutral, and dried in an oven at 60°C to obtain intrinsic PAni, which was weighed and the yield was 30%. .

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Abstract

Production of polyphenyl micro / nanometer fiber is carried out by polymerizing by oil / water two-phase interface in proportion of oxidant concentration: monomer concentration>=2:4, reactive medium in water phase can be organic acid or organic benzenesulfonic acid and reactive medium concentration is >=0.5mol / L. It has standard production and more yield.

Description

Technical field: [0001] The invention relates to material technology, and in particular provides a new technology for preparing polyaniline micro / nano fibers with high yield. Background technique: [0002] Conductive polymers are called "synthetic metals" because they combine the chemical and mechanical properties of polymers with the optical, electrical and magnetic properties of metals and semiconductors. A large number of studies have shown that intrinsically conductive polymers are polymer chains with conjugated bonds. Through new technologies of chemical or electrochemical doping, their conductivity can be changed in a wide range of insulator-semiconductor-metal conductors (10 -9 ~10 5 S / cm), which is unmatched by any material at present. After more than 20 years of development, in addition to polyacetylene, a series of conductive polymers with better chemical stability have been discovered and systematically studied, such as polyaniline (PAni), polypyrrole (PPy), pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02
Inventor 郭雪梅李永锐石南林
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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