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Process for synthesizing polythiophene

A synthesis method and technology of polythiophene, which is applied in the field of polythiophene synthesis, can solve the problems of no economic benefit, high price, and increased production cost, and achieve good yield, universal applicability, simple operation, and good chemical stability Effect

Inactive Publication Date: 2008-04-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the solvent ionic liquid and the oxidant gold chloride used in this method are relatively expensive reagents, which make the preparation cost increase a lot, and there is no advantage in terms of economic benefits.

Method used

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  • Process for synthesizing polythiophene
  • Process for synthesizing polythiophene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Accurately measure 5mL of n-hexane into a 50mL beaker, then add 0.4mL (5mmol) thiophene monomer, and stir until evenly mixed; accurately weigh 2437mg of anhydrous ferric chloride and dissolve it in 20mL of nitromethane, and ultrasonically mix it for 5min uniform. In about 20 minutes, the oxidizing agent solution was added dropwise to the continuously stirring monomer solution, and the above reaction was continued in an ice bath at 0° C. for 24 hours. The reaction system solution gradually changed from colorless to dark green and black. After the reaction, move the reaction solution into a centrifuge tube, centrifuge at 4000rpm, take it out after 10min, absorb the upper layer liquid with a dropper, add absolute ethanol or deionized water, wash thoroughly, and then proceed at the same speed centrifugal. Repeat washing and centrifugation for 4 to 5 times until the upper layer liquid becomes completely colorless. After 48 hours of drying, a reddish-brown polythiophene po...

Embodiment 2～7

[0026] Repeat Example 1, change the addition amount of oxidant anhydrous ferric chloride, make the oxygen single ratio be 1.5:1, 1.75:1, 2:1, 2.2:1, 2.5:1, 3:1 respectively. A series of solid powders varying from reddish brown to brown were obtained, with yields of 22.8%, 22.1%, 21.8%, 72.6%, 78.5%, and 83.0%, respectively.

[0027] The electrical conductivity measured by the tablet method was 1.2×10 -10 S / cm, 5.0×10 -9 S / cm, 7.5×10 -9 S / cm, 7.8×10 -9 S / cm, 8.2×10 -12 S / cm, 5.1×10 -12 S / cm.

Embodiment 8～11

[0029]Repeat Example 1 and change the reaction temperature so that the reaction temperatures are 10°C, 20°C, 25°C, and 30°C, respectively, to obtain a reddish-brown solid powder with yields of 78.3%, 89.5%, 90.8%, and 92.6%, respectively. The conductivity measured by tablet method is 1.53×10 -12 S / cm, 3.7×10 -11 S / cm, 2.8×10 -12 5 / cm, 1.9×10 -12 S / cm.

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Abstract

The invention discloses a synthetic method for polythiophene; the invention is characterized in that the synthetic method comprises the following steps: a thiophene monomer is dissolved in first solvent to produce thiophene monomer solution, ferric chloride is dissolved in second solvent to produce ferric chloride solution, the thiophene monomer solution and the ferric chloride solution are mixed, after full reaction, a reaction product is separated out, thereby obtaining the polythiophene, wherein, the first solvent and the second solvent are not insoluble mutually. The method of the invention is economical and effective, the operation is simple, and the method has good yield rate and general adaptability.

Description

technical field [0001] The invention relates to a synthesis method of polythiophene. Background technique [0002] Organic conductive polymers represented by polyacetylene, polyaniline, polypyrrole, polythiophene and poly(p-phenylene vinylene) have become a research hotspot in recent years and have been applied in many fields. Polythiophene is one of the very important conductive polymers. It has been widely concerned by researchers because of its high electrical conductivity, good environmental stability and easy-to-adjust molecular chain structure. Polythiophene materials have shown good application prospects in sensors, photovoltaic cells, and metal anticorrosion. However, the synthesis of polythiophene is not as simple and easy as polyaniline and polypyrrole. This is mainly because thiophene monomers are insoluble in water and have low reactivity in water. Therefore, thiophene monomers cannot be polymerized in the water phase. And a very small amount of water will make...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12
Inventor 李新贵李骥黄美荣孟庆恺
Owner TONGJI UNIV