KR20110097460A - Method of preparing polythiophene and polythiophene prepared by same - Google Patents

Abstract

A process for the preparation of polythiophenes, the process comprising the addition of thiophene to a polymer solvent which is dichloromethane or chloroform to prepare a thiophene solution; FeCl ₃ was dissolved in acetonitrile to prepare a FeCl ₃ solution; Adding the FeCl ₃ solution to the thiophene solution to prepare a mixed solution; It includes the process of polymerizing-reacting the said mixed liquid.

Description

Method for preparing polythiophene and polythiophene prepared by the method

The present disclosure relates to a method for producing polythiophene and to polythiophene prepared by the method.

Among the conductive polymers, polythiophenes are widely used in various fields because of their unique electrical and optical properties, excellent environmental stability and thermal stability.

The unsubstituted polythiophene among these polythiophene has an economical advantage in price, but is not chemically stable in the manufacturing process, it is mostly manufactured in the substituted form.

One aspect of the present invention is to provide a method for producing polythiophene having excellent electrical conductivity.

Another aspect of the invention to provide a polythiophene prepared by the above production method.

According to one embodiment of the present invention, a thiophene solution is prepared by adding thiophene to a polymer solvent which is dichloromethane or chloroform; FeCl ₃ was dissolved in acetonitrile to prepare a FeCl ₃ solution; Adding the FeCl ₃ solution to the thiophene solution to prepare a mixed solution; It provides a method for producing a polythiophene comprising the step of polymerizing the mixed solution.

The mixed molar ratio of the FeCl ₃ and the thiophene in the mixed solution may be 1: 1 to 6: 1:

In the mixed solution, the ratio of acetonitrile to the polymer solvent may be 1: 0.1 to 1 by volume.

The polymerization reaction can be carried out at -10 ℃ to 30 ℃.

The polymerization reaction may be carried out for 10 minutes to 24 hours.

According to another embodiment of the present invention, it is possible to provide a polythiophene prepared by the above method. The polythiophene can be suitably used as a catalyst carrier of a fuel cell.

Other specific details of embodiments of the present invention are included in the following detailed description.

Manufacturing method according to an embodiment of the present invention can provide a polythiophene excellent in electrical conductivity.

1 is a graph showing the electrical conductivity and yield of the polythiophene prepared according to Examples 8 to 13.
2 is a graph showing the electrical conductivity and yield of the polythiophene prepared according to Examples 14 to 16.
3 is a graph showing the electrical conductivity and yield of the polythiophene prepared according to Examples 17 to 22.
Figure 4 is a graph showing the measurement of the FT-IR of the polythiophene prepared according to Examples 4, 12, Comparative Examples 5 and 6.
5 is a SEM photograph of polythiophene prepared according to Examples 4, 12, Comparative Examples 5 and 6.
6 shows Example 4 And TEM photographs of polythiophenes prepared according to Comparative Example 5.
Figure 7 is a graph showing the results of the Wide Angle X-ray Diffraction (WAXD) measurement of the polythiophene prepared according to Examples 4, 12, Comparative Examples 5 and 6.
8 is a graph showing the results of thermogravimetric analysis (TGA) measurement of polythiophene prepared according to Example 1, Comparative Examples 5 and 6.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, by which the present invention is not limited and the present invention is defined only by the scope of the claims to be described later.

One embodiment of the present invention provides a method for preparing a polythiophene, which method comprises adding thiophene to a polymer solvent of dichloromethane or chloroform to prepare a thiophene solution; FeCl ₃ was dissolved in acetonitrile to prepare a FeCl ₃ solution; Adding the FeCl ₃ solution to the thiophene solution to prepare a mixed solution; It provides a method for producing a polythiophene comprising the step of polymerizing the mixed solution. This process can easily prepare a polythiophene that includes an unsubstituted, for example, a repeating unit represented by the following formula (1).

[Formula 1]

 Such unsubstituted polythiophene is not suitable because side reaction occurs when water is used in the polymerization process, conjugation structure is destroyed, and the electrical conductivity is rapidly deteriorated, so that the electrical conductivity hardly appears. . In addition, the yield of polythiophenes is significantly lower, and the polythiophenes produced are also prepared in substituted form with carbonyl groups bonded, making it nearly impossible to produce unsubstituted polythiophenes.

Thus, the production method according to an embodiment of the present invention can produce a chemically stable polythiophene without using water as a solvent. Hereinafter, a manufacturing method according to an embodiment of the present invention will be described in more detail.

First, a thiophene solution and a FeCl ₃ solution are prepared, respectively.

The thiophene solution may be prepared by adding thiophene to chloroform or dichloromethane, which is a polymer solvent, and then dissolving it. The chloroform or dichloromethane can dissolve thiophene well and increase the yield.

In addition, the FeCl ₃ solution may be prepared by adding FeCl ₃ and then dissolving in acetonitrile. FeCl ₃ acts as an oxidizer, and acetonitrile can dissolve FeCl ₃ well. That is, FeCl ₃ has excellent solubility in acetonitrile, the FeCl ₃ activity is greatly increased during the polymerization reaction, which can further activate the oxidative polymerization reaction of the thiophene monomer, thereby increasing the electrical conductivity of the polythiophene. Can be improved .

In the manufacturing method according to an embodiment of the present invention, the solvent used in the thiophene solution and the solvent used in the FeCl ₃ solution may be differently used, which may greatly improve the electrical conductivity of the polythiophene prepared. . If the same solvent is used as the solvent used in the thiophene solution and the FeCl ₃ solution, the electrical conductivity of the polythiophene produced is not appropriate.

Subsequently, FeCl ₃ solution is added to the prepared thiophene solution to prepare a mixed solution. The molar ratio of FeCl ₃ and thiophene in the mixed solution is suitably 1: 1 to 6: 1. When the molar ratio of FeCl ₃ to thiophene is included in the above range, polythiophene showing excellent electrical conductivity can be prepared in an appropriate yield.

In addition, the mixing ratio of acetonitrile to the polymer solvent (chloroform or dichloromethane) in the mixed solution may be 1: 0.1 to 1 volume ratio. When the mixing ratio of acetonitrile to the polymer solution is included in the above range, polythiophene showing excellent electrical conductivity can be prepared in an appropriate yield.

Subsequently, the mixed solution is polymerized to prepare polythiophene.

The polymerization step can be carried out at -10 ℃ to 30 ℃. In addition, the polymerization process may be carried out for 10 minutes to 24 hours. When the polymerization process is carried out for the above temperature and time, polythiophene exhibiting excellent electrical conductivity can be prepared in an appropriate yield.

After the said polymerization process is completed, the normal process of filtration, water washing, and drying can be implemented.

As such, the method for producing polythiophene according to one embodiment of the present invention is very simple, the reaction time is short, it is possible to produce a polythiophene excellent in electrical conductivity.

Polythiophene prepared according to this process may be an unsubstituted polythiophene, including a repeating unit represented by the following formula (1). In addition, the electrical conductivity of the polythiophene is 0.1 to 10 S / cm, showing a very good electrical conductivity.

[Formula 1]

Polythiophene prepared according to one embodiment of the present invention is excellent in electrical conductivity can be usefully used as a catalyst carrier for fuel cells.

Hereinafter, specific embodiments of the present invention are presented. However, the embodiments described below are only intended to illustrate or explain the present invention, and thus the present invention should not be limited thereto.

(Example 1)

A thiophene solution was prepared by adding 0.02 mol of thiophene to 100 ml of dichloromethane and then stirring at 30 ° C. for 1 hour.

0.1 mol of FeCl ₃ was added to 10 ml of acetonitrile, and then stirred at 30 ° C. for 1 hour to prepare a FeCl ₃ solution.

FeCl ₃ solution was added to the thiophene solution to prepare a mixed solution. In this mixture the molar ratio of FeCl ₃ and thiophene (FeCl _3: thiophene) is 5: 1.

The mixture was polymerized by stirring slowly at 0 ° C. for 10 minutes.

The polymerization product was washed several times with acetone and dried in a 30 ° C. vacuum oven to prepare an unsubstituted polythiophene comprising repeating units of formula (1).

[Formula 1]

(Example 2)

0.1 mol of FeCl ₃ was added to 20 ml of acetonitrile, and the same procedure as in Example 1 was carried out except that the FeCl ₃ solution prepared by stirring at 30 ° C. for 1 hour was used. Thiophene was prepared.

(Example 3)

0.1 mol of FeCl ₃ was added to 30 ml of acetonitrile, and the same procedure as in Example 1 was carried out except that FeCl ₃ solution was prepared by stirring at 30 ° C. for 1 hour to prepare an unsubstituted polythiophene. It was.

(Example 4)

0.1 mol of FeCl ₃ was added to 50 ml of acetonitrile, and the same procedure as in Example 1 was conducted except that the FeCl ₃ solution prepared by stirring at 30 ° C. for 1 hour was used to prepare an unsubstituted polythiophene. It was.

(Example 5)

0.1 mol of FeCl ₃ was added to 70 ml of acetonitrile, and the same procedure as in Example 1 was conducted except that the FeCl ₃ solution prepared by stirring at 30 ° C. for 1 hour was used to prepare an unsubstituted polythiophene. It was.

(Example 6)

0.1 mol of FeCl ₃ was added to 100 ml of acetonitrile, and the same procedure as in Example 1 was conducted except that the FeCl ₃ solution prepared by stirring at 30 ° C. for 1 hour was used to prepare an unsubstituted polythiophene. It was.

(Reference Example 1)

0.1 mole of FeCl ₃ was added to 150 ml of acetonitrile, and the same procedure as in Example 1 was conducted except that the FeCl ₃ solution prepared by stirring at 30 ° C. for 1 hour was used to prepare an unsubstituted polythiophene. It was.

(Example 7)

Unsubstituted polythiophene was prepared in the same manner as in Example 1, except that 0.02 mol of thiophene was added to 100 ml of chloroform, followed by using a thiophene solution prepared by stirring at 30 ° C. for 1 hour. .

(Comparative Example 1)

A polythiophene was prepared in the same manner as in Example 1, except that 0.02 mol of thiophene was added to 100 ml of water, and then a thiophene solution prepared by stirring at 30 ° C. for 1 hour was used. The polythiophene prepared was a substituted polythiophene bonded to a carbonyl group.

(Comparative Example 2)

Unsubstituted polythiophene was prepared in the same manner as in Example 1, except that 0.02 mol of thiophene was added to 100 ml of ethanol, followed by using a thiophene solution prepared by stirring at 30 ° C. for 1 hour. .

(Comparative Example 3)

Unsubstituted polythiophene was prepared in the same manner as in Example 1, except that 0.02 mol of thiophene was added to 100 ml of toluene, followed by using a thiophene solution prepared by stirring at 30 ° C. for 1 hour. .

(Comparative Example 4)

Unsubstituted polythiophene was prepared in the same manner as in Example 1, except that 0.02 mol of thiophene was added to 100 ml of acetonitrile, and then a thiophene solution prepared by stirring at 30 ° C. for 1 hour was used. It was.

* Measurement of electrical conductivity of polythiophene according to solvent usage

The electrical conductivity of the polythiophene prepared according to Examples 1 to 6 and Reference Examples 1 to 2 was measured, and the results are shown in Table 1 below.

Dichloromethane Usage in Thiophene Solution
(Thiophene consumption: 0.02 mol) Acetonitrile use in FeCl ₃ solution
(0.1 mol of FeCl ₃ used) Electrical Conductivity (S / cm) Example 1 100 ml 10 ml 0.33 Example 2 100 ml 20 ml 2.2 Example 3 100 ml 30 ml 7.8 Example 4 100 ml 50 ml 5.5 Example 5 100 ml 70ml 1.4 Example 6 100 ml 100 ml 2.4 X 10 ^-3 Reference Example 1 100 ml 150 ml 3.7 X 10 ^-3

As shown in Table 1, in Examples 1 to 6 where the mixing ratio of the dichloromethane solvent and the acetonitrile solvent used when mixing the thiophene solution and the FeCl ₃ solution is 1: 0.1 to 1 by volume, the poly exhibiting excellent electrical conductivity It can be seen that thiophene can be prepared. On the contrary, in the case of Reference Example 1 in which the acetonitrile solvent used in the FeCl ₃ solution was used in excess of the dichloromethane solvent used in the thiophene solution, the electrical conductivity of the polythiophene produced was deteriorated.

In addition, in Examples 1 to 5 in which the acetonitrile solvent used in the FeCl ₃ solution was used in an amount of 10 to 70% by volume of the dichloromethane solvent used in the thiophene solution, a polythiophene having better electrical conductivity was prepared. In particular, in Examples 3 to 5 used in an amount of 30 to 50% by volume, it can be seen that polythiophene having excellent electrical conductivity can be prepared.

* Measurement of electrical conductivity of polythiophene according to solvent type

The electrical conductivity of the polythiophene prepared in Examples 4, 7 and Comparative Examples 1 to 4 was measured and the results are shown in Table 2 below.

Solvent type in thiophene solution (solvent usage: 100 ml, thiophene usage: 0.02 mol) Solvent type in FeCl ₃ solution (solvent usage: 50 ml, FeCl ₃ usage: 0.1 mol) Electrical Conductivity (S / cm) Example 4 Dichloromethane Acetonitrile 5.5 Comparative Example 1 water Acetonitrile - Comparative Example 4 Acetonitrile Acetonitrile 1.0 X 10 ^-4 Example 7 chloroform Acetonitrile 7.2 X 10 ^-2 Comparative Example 2 ethanol Acetonitrile - Comparative Example 3 toluene Acetonitrile -

As shown in Table 2, in Examples 4 and 7 using dichloromethane and chloroform as a solvent when preparing the thiophene solution, it can be seen that a polythiophene showing an appropriate electrical conductivity is prepared.

On the other hand, in the case of Comparative Example 4 using acetonitrile as a solvent when preparing a thiophene solution, polythiophene having a very low electrical conductivity was prepared, and in the case of Comparative Examples 1 to 3 using water, ethanol and toluene as solvents, The electrical conductivity of the polythiophene was not measured. That is, it can be seen that a polythiophene having no electrical conductivity was produced.

(Example 8)

A thiophene solution was prepared by adding 0.02 mol of thiophene to 100 ml of dichloromethane and then stirring at 30 ° C. for 1 hour.

0.02 mol of FeCl ₃ was added to 50 ml of acetonitrile, and then stirred at 30 ° C. for 1 hour to prepare a FeCl ₃ solution.

FeCl ₃ solution was added to the thiophene solution to prepare a mixed solution, in which the molar ratio of FeCl ₃ and thiophene (FeCl ₃ : thiophene) was 1: 1.

The mixture was polymerized by slowly stirring at 0 ° C. for 24 hours.

The polymerization product was washed several times with acetone and dried in a vacuum oven at 30 ° C. to prepare a polythiophene having a repeating unit represented by the following formula (1), that is, unsubstituted.

[Formula 1]

(Example 9)

A thiophene solution was prepared by adding 0.02 mol of thiophene to 100 ml of dichloromethane and then stirring at 30 ° C. for 1 hour.

0.04 mol of FeCl ₃ was added to 50 ml of acetonitrile, and then stirred at 30 ° C. for 1 hour to prepare a FeCl ₃ solution.

A FeCl ₃ solution was added to the thiophene solution to prepare a mixed solution, in which the molar ratio of FeCl ₃ and thiophene (FeCl ₃ : thiophene) was 2: 1.

Unsubstituted polythiophene was prepared in the same manner as in Example 8 except for using the mixed solution.

(Example 10)

A thiophene solution was prepared by adding 0.02 mol of thiophene to 100 ml of dichloromethane and then stirring at 30 ° C. for 1 hour.

0.06 mol of FeCl ₃ was added to 50 ml of acetonitrile, and then stirred at 30 ° C. for 1 hour to prepare a FeCl 3 solution.

By the addition of FeCl ₃ solution to the thiophene solution, a mixed solution was prepared, in a mixture of FeCl ₃ and the molar ratio thiophene (FeCl _3: thiophene) is 3: 1.

Unsubstituted polythiophene was prepared in the same manner as in Example 8 except for using the mixed solution.

(Example 11)

A thiophene solution was prepared by adding 0.02 mol of thiophene to 100 ml of dichloromethane and then stirring at 30 ° C. for 1 hour.

0.08 mole of FeCl ₃ was added to 50 ml of acetonitrile, and then stirred at 30 ° C. for 1 hour to prepare a FeCl ₃ solution.

A FeCl ₃ solution was added to the thiophene solution to prepare a mixed solution, in which the molar ratio of FeCl ₃ and thiophene (FeCl ₃ : thiophene) was 4: 1.

Unsubstituted polythiophene was prepared in the same manner as in Example 8 except for using the mixed solution.

(Example 12)

A thiophene solution was prepared by adding 0.02 mol of thiophene to 100 ml of dichloromethane and then stirring at 30 ° C. for 1 hour.

0.1 mol of FeCl ₃ was added to 50 ml of acetonitrile, and then stirred at 30 ° C. for 1 hour to prepare a FeCl 3 solution.

A FeCl ₃ solution was added to the thiophene solution to prepare a mixed solution, in which the molar ratio of FeCl ₃ and thiophene (FeCl ₃ : thiophene) was 5: 1.

Unsubstituted polythiophene was prepared in the same manner as in Example 8 except for using the mixed solution.

(Example 13)

A thiophene solution was prepared by adding 0.02 mol of thiophene to 100 ml of dichloromethane and then stirring at 30 ° C. for 1 hour.

0.12 mole of FeCl ₃ was added to 50 ml of acetonitrile, and then stirred at 30 ° C. for 1 hour to prepare a FeCl ₃ solution.

By the addition of FeCl ₃ solution to the thiophene solution, a mixed solution was prepared, in a mixture of FeCl ₃ and the molar ratio thiophene (FeCl _3: thiophene) is 6: 1.

Unsubstituted polythiophene was prepared in the same manner as in Example 8 except for using the mixed solution.

(Example 14)

Unsubstituted polythiophene was prepared in the same manner as in Example 13 except that the mixture was slowly stirred at −10 ° C. for 24 hours to polymerize.

(Example 15)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 10 ° C. for 24 hours to polymerize.

(Example 16)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 30 ° C. for 24 hours to polymerize.

(Example 17)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 0 ° C. for 30 minutes to polymerize.

(Example 18)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 0 ° C. for 1 hour to polymerize.

(Example 19)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 0 ° C. for 3 hours to polymerize.

(Example 20)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 0 ° C. for 6 hours to polymerize.

(Example 21)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 0 ° C. for 12 hours to polymerize.

(Example 22)

Unsubstituted polythiophene was prepared in the same manner as in Example 12 except that the mixture was slowly stirred at 0 ° C. for 18 hours to polymerize.

The electrical conductivity and yield of the polythiophene prepared according to Examples 8 to 13 were measured and the results are shown in FIG. 1. Figure is a value showing the x-axis represents the molar ratio of FeCl ₃ and FeCl ₃ thiophene and 1 / thiophene. As shown in FIG. 1, when the molar ratio of FeCl ₃ / thiophene is included in the range of 1 to 6, polythiophene having a conductivity of 0.2 to 1.2 X 10 ^-1 S / cm is prepared in a yield of 10 to 70%. It can be seen that.

In addition, the electrical conductivity and yield of the polythiophene prepared according to Examples 14 to 16 were measured and the results are shown in FIG. 2. Also for reference, the electrical conductivity and yield of the polythiophene prepared according to Example 12 are shown again in FIG. 2. As shown in FIG. 2, when the polymerization temperature is -10 ° C to 30 ° C, it can be seen that polythiophene having an electrical conductivity of 0.1 to 1.2 S / cm is prepared at a yield of 45 to 70%.

In addition, the electrical conductivity and yield of the polythiophene prepared according to Examples 17 to 22 were measured and the results are shown in FIG. 3. Also for reference, the electrical conductivity and yield of the polythiophene prepared according to Examples 1 and 12 are shown again in FIG. 3. As shown in FIG. 3, when the polymerization time is 10 minutes to 24 hours, it can be seen that a polythiophene having an electrical conductivity of 1.2 to 5.5 S / cm is produced at a yield of 30 to 50%.

(Comparative Example 5)

After adding 0.02 mol of thiophene to 100 ml of water, the thiophene solution prepared by stirring at 30 ° C. for 1 hour was used, and the mixed solution of the thiophene solution and the FeCl ₃ solution was mixed at 0 ° C. for 24 hours. A polythiophene was prepared in the same manner as in Example 1 except that the polymerization was carried out.

(Comparative Example 6)

After adding 0.02 mol of thiophene to 100 ml of acetonitrile, the thiophene solution prepared by stirring at 30 ° C. for 1 hour was used, and the mixed solution of the thiophene solution and the FeCl ₃ solution was mixed at 0 ° C. for 24 hours. A polythiophene was prepared in the same manner as in Example 1 except that the polymerization was carried out by polymerization.

* FT-IR measurement

Examples 4, 12, above Fourier transform infrared spectra (FT-IR) of the polythiophene prepared according to Comparative Examples 5 and 6 was measured and the results are shown in FIG. 4. As shown in FIG. 4, in the case of Comparative Example 5 using water in preparing the thiophene solution, it can be seen that a polythiophene having an unsuitable carbonyl group was prepared. It can be seen that the electrical conductivity of the prepared polythiophene is significantly lowered, which can be clearly seen from the results of the electrical conductivity of the polythiophene of Comparative Example 1 using water in Table 2 was not measured.

In contrast, it can be seen that in Examples 4, 12 and Comparative Example 5 which do not use water, the polythiophene prepared does not have a carbonyl group.

* SEM (Scanning Electron Microscopy) Measurement

SEM pictures of the polythiophene prepared according to Examples 4 and 12, Comparative Examples 5 and 6 are shown in Figure 5 (a: Example 4), (b: Example 12), (d: Comparative Example 5) and (c: Comparative Example 6). As shown in Figure 5, the polythiophene prepared by Example 4 (a) and Example 12 (b) is formed of circular or elliptical particles having an average size of about 50nm to about 300nm, Comparative Example The polythiophene prepared by 6 (c) is composed of microsized polythiophene particles. On the other hand, it can be seen that the polythiophene particles prepared according to Comparative Example 5 (d) have a structure in which particles of about 50 nm to about 200 nm are aggregated with each other.

* Transition Electron Microscopy (TEM) Measurement

Example 4 above And TEM picture of the polythiophene prepared according to Comparative Example 5 is shown in Figure 6 (a: Example 4) and (b: Comparative Example 5).

As shown in Figure 6, the polythiophene prepared according to Example 4 (a) it can be seen that the particles having a size of about 50nm to about 300nm is formed, prepared according to Comparative Example 5 (b) It can be seen that the polythiophene has a size of about 50 nm to about 200 nm.

* Wide Angle X-ray Diffraction (WAXD) Measurement

WAXD of polythiophene prepared according to Examples 4, 12 and Comparative Examples 5 and 6 were measured. WAXD was measured using CuKα from 40 kV and 100 mA acceleration conditions to measuring angles 2θ 5o to 45o. The results are shown in FIG. As shown in FIG. 7, it can be seen that the polythiophene prepared according to Examples 4, 12 and 6 compared to Comparative Example 5 using water has excellent crystallinity, and accordingly, electrical conductivity may be improved. Can be predicted.

Thermogravimetric analysis (TGA)

Thermogravimetric analysis of the polythiophene prepared according to Example 4, Comparative Examples 5 and 6 was carried out, and the results are shown in FIG. 8. The thermogravimetric analysis was carried out by measuring the weight change under a nitrogen stream while raising the polythiophene at a temperature increase rate of 10 ℃ / min from 30 to 800 ℃. The results shown in Figure 8 shows the residual amount (%) at each temperature. From this result, it can be seen that the polythiophene prepared according to Example 1 has the best thermal stability over a wide temperature range, and thus the polythiophene prepared according to the present invention can be thermally processed and thus can be applied to various processing methods. have.

The present invention is not limited to the above embodiments, but may be manufactured in various forms, and a person skilled in the art to which the present invention pertains has another specific form without changing the technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (7)

Thiophene solution is prepared by adding thiophene to a polymer solvent which is dichloromethane or chloroform;
FeCl ₃ was dissolved in acetonitrile to prepare a FeCl ₃ solution;
Adding the FeCl ₃ solution to the thiophene solution to prepare a mixed solution;
Polymerizing the mixed solution
A method for producing a polythiophene comprising the step. The method of claim 1,
In the mixed solution, the mixing molar ratio of the FeCl ₃ and the thiophene is 1: 1 to 6: 1 method of producing a polythiophene. The method of claim 1,
In the mixed solution, the ratio of acetonitrile to the polymer solvent is 1: 0.1 to 1 volume ratio of the production method of polythiophene. The method of claim 1,
The polymerization reaction is a method for producing a polythiophene is carried out at -10 ℃ to 30 ℃. The method of claim 1,
The polymerization reaction is carried out for 10 minutes to 24 hours.
Polythiophene prepared according to any one of claims 1 to 5. The method of claim 6,
The polythiophene is used as a catalyst carrier of the fuel cell.

Images