Polyaniline nano-fibre and method for preparing same

A nanofiber and polyaniline technology, which is applied in the field of polyaniline nanofibers and its preparation, can solve the problems of difficult removal of template agents, environmental pollution of oil-phase organic solvents, and high production costs, and achieves great practical value and avoids the effects of environmental pollution.

Inactive Publication Date: 2008-10-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The methods currently used to prepare polyaniline nanofibers are mainly template methods, self-assembly methods, interfacial polymerization and other methods. These methods generally have the following problems: (1) the template agent used after the

Method used

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  • Polyaniline nano-fibre and method for preparing same
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  • Polyaniline nano-fibre and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Dissolve 0.5g polyethylene glycol in 30ml water;

[0028] (2) 5ml hydrochloric acid is dissolved in the above-mentioned solution under stirring condition;

[0029] (3) Add 2ml of aniline under stirring condition to form component A;

[0030] (4) 2.0g ammonium persulfate is dissolved in 20ml water to form component B;

[0031] (5) Continuously add component B dropwise to component A under stirring condition at a rate of 0.01ml / min. After the dropwise addition, continue to react for 10 hours, and control the reaction temperature between 3°C;

[0032] (6) After filtering the reaction product, wash with methanol, acetone and deionized water respectively until the filtrate is colorless;

[0033] (7) Carry out secondary doping with hydrochloric acid aqueous solution, the hydrochloric acid concentration that secondary doping is used is 0.5~4.0M, and the time of doping is 10 hours;

[0034] (8) Vacuum drying after washing to obtain polyaniline nanofibers, the vacuum degr...

Embodiment 2

[0036] (1) Mix water and water-soluble organic solvent in a volume ratio of 1:1 to form a 100ml homogeneous system;

[0037] (2) 10.0g polyethylene glycol is dissolved in the above system;

[0038] (3) 20ml hydrochloric acid is dissolved in the above-mentioned solution under the condition of stirring;

[0039] (4) Add 10ml of aniline under stirring condition to form component A;

[0040] (5) 20.0g ammonium persulfate is dissolved in the 50ml homogeneous system formed by mixing water and water-soluble organic solvent in a ratio of 1:1 by volume to form component B;

[0041] (6) Continuously add component B dropwise to component A under stirring condition, the dropping rate is 5.0ml / min; after the dropwise addition, continue to react for 24 hours, and the reaction temperature is controlled between 5°C;

[0042] (7) After filtering the reaction product, wash with methanol, acetone and deionized water respectively until the filtrate is colorless;

[0043] (8) carry out secondar...

Embodiment 3

[0046] (1) 5.0g polyethylene glycol is dissolved in 60ml water-soluble organic solvent;

[0047] (2) 12ml hydrochloric acid is dissolved in the above-mentioned solution under the condition of stirring;

[0048] (3) Add 5ml of aniline under stirring condition to form component A;

[0049] (4) 10.0g ammonium persulfate is dissolved in 400ml water-soluble organic solvent to form component B;

[0050] (5) Add component B to component A drop by drop continuously under stirring condition, the dropping rate is 0.01-5.0ml / min; after the dropwise addition, continue to react for 1-24 hours, and control the reaction temperature at 0°C ~5°C;

[0051] (6) After filtering the reaction product, wash with methanol, acetone and deionized water respectively until the filtrate is colorless;

[0052] (7) carry out secondary doping with hydrochloric acid aqueous solution, the hydrochloric acid concentration that secondary doping is used is 0.5~4.0M, and the time of doping is 0~48 hours;

[005...

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Abstract

The invention relates to a polyaniline nanofiber and a method for making the same. The technique is characterized in that polyethyleneglycol with ether link functional group is taken as a templating agent, a homogeneous system of water and water-solubility organic solvent is taken as a reacting medium, ammonium persulfate is taken as an oxidizer, hydrochloric acid is taken as doping acid; the compositions in mixture ratio are: 0.5 to 10.0g of polyethyleneglycol, 30 to 150 ml of the homogeneous system of water and water-solubility organic solvent and 5 to 20 ml of hydrochloric acid, 2.0 to 20.0g of ammonium persulfate, and 2 to 10 ml of aniline, wherein, the volume content of the water-solubility organic solvent is between 0 and 100 percent. The method for making the polyaniline nanofiber has little environmental pollution, simple technique and high productivity and is easy to produce industrially; the obtained polyaniline nanofiber has good electroconductibility and thermal stability. The polyaniline nanofiber synthesized by the method can be applied to the fields such as an antistatic material, an electromagnetic screen material, a sensor, a secondary battery, a camouflage material, an anti-rot material and a nano functional device.

Description

technical field [0001] The invention relates to a polyaniline nanofiber and a preparation method thereof. The homogeneous system composed of polyethylene glycol containing ether bond functional groups as a template, hydrochloric acid as a dopant, water and a water-soluble organic solvent as a reaction medium is used as a reaction medium. Chemical oxidation is prepared through a series of steps. Background technique [0002] One-dimensional polyaniline nanostructures such as nanowires, nanotubes, nanorods, and nanofibers have different properties from ordinary polyaniline random particles, and play an important role in the manufacture of nanofunctional devices. When the characteristic dimensions of a material reach the nanometer scale, its performance will change significantly relative to the bulk material. In recent years, researchers have made great progress in the preparation of polyaniline nanofibers, but the preparation of polyaniline nanofibers with controllable size, ...

Claims

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Application Information

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IPC IPC(8): C08G73/02
Inventor 齐暑华王东红黄英
Owner NORTHWESTERN POLYTECHNICAL UNIV
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