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Preparation method of crosslinking kind net conductive polythiofuran meterial

A cross-linked, conductive polymer technology, applied in the electrolysis process, electrolysis components, electrolysis organic production and other directions, can solve the problems of swelling, poor stability and reproducibility, reduce membrane conductivity, etc., and achieve a simple and fast method and a wide range of applications. Foreground effect

Inactive Publication Date: 2007-02-14
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, recent research results have also found that such conductive polymer composite membrane materials, whether prepared by drop coating or electropolymerization, always have disadvantages such as easy to fall off from the electrode surface, swelling, poor stability and reproducibility. , while the conductive polymer backbone is only used as a carrier material, which basically does not help the ion selectivity
Generally, the crosslinking of conductive polymer films can improve the stability to a certain extent, but at the same time, due to the existence of crosslinking and branching, the conductivity of the film is also reduced to a certain extent.

Method used

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  • Preparation method of crosslinking kind net conductive polythiofuran meterial
  • Preparation method of crosslinking kind net conductive polythiofuran meterial
  • Preparation method of crosslinking kind net conductive polythiofuran meterial

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Experimental program
Comparison scheme
Effect test

Embodiment (1

[0033] Embodiment (1): According to A, the flexible chain is polymerized by chemical method to form a cross-linked conductive polythiophene material with different lengths of ethoxy chains.

[0034] Participate in the reaction diol ② for diethylene glycol.

[0035] The molar ratio of 3-bromothiophene ①, diethylene glycol ②, sodium and cuprous bromide is 2:1:2:0.2, firstly 1.06g (0.01mol) diethylene glycol ② is dissolved in 100ml N-methylpyrrolidone , add 0.46g (0.02mol) sodium metal and react at 40°C for 24 hours. After the sodium is completely reacted, add 0.02mol of 3-bromothiophene 3.26g, 0.002mol of cuprous bromide 0.288g, and react in an oil bath at 100°C for 36 hours. After cooling, filter, evaporate the solvent under reduced pressure, and purify by 100-200 mesh silica gel column chromatography with dichloromethane as the eluent to obtain a yellow liquid dithiophene monomer ③. Dissolve 3.55g (0.02mol) of N-bromosuccinimide (NBS) in 50ml of chloroform, stir to dissolve, ...

Embodiment (2

[0036]Embodiment (2): According to A, the flexible chain is polymerized by chemical method to form a cross-linked conductive polythiophene material with different lengths of ethoxy chains.

[0037] Participating in the reaction diol ② is diethylene glycol, and ⑤ is (2,5-two 3-methyl tin-thiophene). The molar ratio of 3-bromothiophene ① to diethylene glycol ②, sodium and cuprous bromide is 2:1:2:0.7. In the polymerization reaction of N-bromosuccinimide, tetrakis(triphenylphosphine) The molar percentage of platinum and dibromobithiophene monomer ④ is 3%. First, 1.06g (0.01mol) of diethylene glycol ② was dissolved in 100ml of N-methylpyrrolidone, and 0.46g (0.02mol) of sodium metal was added to react at 50°C for 24 hours. After the sodium was completely reacted, 0.02mol of 3-bromothiophene was added. 3.26g, 0.007mol cuprous bromide 1.008g, reacted in an oil bath at 105°C for 36 hours, filtered after cooling, evaporated the solvent under reduced pressure, purified by 100-200 mesh...

Embodiment

[0038] Embodiment (3): According to A, the flexible chain is polymerized by chemical method to form a cross-linked conductive polythiophene material with different lengths of ethoxy chains.

[0039] Participating in the reaction diol ② is diethylene glycol, and ⑤ is (2,5-two 3-methyl tin-thiophene). The molar ratio of 3-bromothiophene ① to diethylene glycol ②, sodium and cuprous bromide is 2:1:2:1.2, tetrakis(triphenylphosphine) platinum and dibromobithiophene monomer in the polymerization reaction ④ The molar percentage is 5%. First, 1.06g (0.01mol) of diethylene glycol ② was dissolved in 100ml of N-methylpyrrolidone, and 0.46g (0.02mol) of sodium metal was added to react at 60°C for 24 hours. After the sodium was completely reacted, 0.02mol of 3-bromothiophene was added. 3.26g, 0.012mol cuprous bromide 1.728g, reacted in an oil bath at 110°C for 36 hours, filtered after cooling, evaporated the solvent under reduced pressure, purified by 100-200 mesh silica gel column chroma...

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Abstract

The present invention is preparation process of cross-linked netted polythiophene. The preparation process includes the first connecting two thiophene monomers chemically with flexible chain containing different functional radicals to form double thiophene unit; and the subsequent chemical or electrochemical polymerization to synthesize cross-linked netted polythiophene. During chemical polymerization, the double thiophene monomer and bisubstituted trimethyl tin polythiophene are polymerized chemically in the presence of tetra(triphenyl phosphine) platinum catalyst to form cross-linked netted polythiophene. During electrochemical polymerization, the double thiophene monomer and other thiophene monomer are constant potential polymerized in ionic liquid BMIMPF6 serving as both solvent and electrolyte. The present invention can prepare conducting polymer film material of different bore sizes, high stability and high selectivity.

Description

technical field [0001] The invention relates to a preparation method of a similar cross-network conductive polythiophene material. Background technique [0002] With the development of modern industry, the pollution of the environment is becoming more and more serious. A large number of metal ions discharged into the surrounding environment, especially heavy metal ions such as Pb and Hg, are extremely harmful to the human body. Therefore, the detection and treatment of harmful species in the environment have become increasingly important. become a very important subject. Synthesis of heavy metal ions with strong selectivity, high removal efficiency, and reusable adsorbent or enrichment agent has extremely important theoretical and application value for the analysis and detection of heavy metal ions, as well as extraction and separation. In the electrochemical analysis and detection of metal ions, ion-selective electrodes have always been a commonly used fast and simple dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12C25B3/00
CPCY02P20/54
Inventor 牛利张齐贤王晓丹杨贵福韩冬雪
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI