Chemical method for preparing film of poly pyrrole in high conductivity on surface of insulating material

A technology of insulating materials and high conductivity, applied in chemical instruments and methods, insulators, chemical/physical processes, etc., can solve problems such as the influence of dopant conductivity that are rarely studied, and achieve reduced energy level difference and easy conduction , the effect of increasing the degree of conjugation

Inactive Publication Date: 2006-02-01
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies have shown that the conductivity of conductive polypyrrole films prepared by chemical polymerization is mainly affected by factors such as oxidant type, solvent medium, p

Method used

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  • Chemical method for preparing film of poly pyrrole in high conductivity on surface of insulating material
  • Chemical method for preparing film of poly pyrrole in high conductivity on surface of insulating material
  • Chemical method for preparing film of poly pyrrole in high conductivity on surface of insulating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A bisphenol A epoxy resin with an area of ​​1.1×1.1 cm was immersed in a solution of γ-chloropropyltrimethoxysilanol with a mass fraction of 0.5%, and the surface was modified at a temperature of 20°C. After drying, immerse in the 30% pyrrole monomer solution at a temperature of 20°C for 3 minutes, then immerse in the 20% oxidant iron trichloride solution for 5 minutes, then use deionized water and no Wash with water and ethanol, and dry at room temperature; repeat the operation of immersing the epoxy resin in the pyrrole monomer solution and the oxidant aqueous solution for 2 times, and react in the ferric chloride solution for 30 minutes in the last pass, and then use deionized water and anhydrous water respectively. After washing with ethanol and drying the sample at 25°C, a polypyrrole film attached to the surface of the bisphenol A epoxy resin was obtained, with an electrical conductivity of 5-10 S / cm.

Embodiment 2

[0018] This example is similar to Example 1, except that the dopant sodium p-toluenesulfonate is added to the oxidizing agent solution, and the electrical conductivity of the polypyrrole film obtained by using different doping amounts is shown in Table 1. It can be seen that , with the increase of doping amount, the electrical conductivity of the polypyrrole film shows a trend of increasing slowly. When it increases to a certain value, the electrical conductivity reaches the highest value. If the doping amount continues to increase, the electrical conductivity of the polypyrrole film tends to decrease again. , so less or too much doping can not get the ideal conductivity. The optimal doping amount is 4.2g / 100mL, and the surface morphology of the prepared conductive polypyrrole film is as follows: figure 2 shown.

[0019] p-toluenesulfonate

Embodiment 3

[0021] This example is similar to Example 1, except that the dopant added to the oxidant solution is sodium dodecylbenzenesulfonate. The electrical conductivity of the polypyrrole film obtained by using different doping amounts is shown in Table 2. It can be seen that the electrical conductivity obtained by doping sodium dodecylbenzenesulfonate is relatively high, and the optimal doping amount is 3.3g / 100mL , the surface morphology of the prepared conductive polypyrrole film is as follows image 3 shown.

[0022] dodecylbenzenesulfonate

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Abstract

A process for chemically preparing the high-electroconductivity polypyrrole film on the surface of insulating material includes such steps as using silane coupling agent to modify the surface of insulating material, drying in air, immersing in pyrrole solution, immersing the doping agent contained aqueous solution of oxidant, polymerizing reaction and drying.

Description

technical field [0001] The invention relates to a method for chemically preparing a high-conductivity polypyrrole film on the surface of an insulating material, which belongs to the technology for preparing a high-conductivity polypyrrole film on the surface of an insulating material. Background technique [0002] Conductive polymers are formed by chemically and electrochemically "doping" polymers with conjugated π bonds. Through "doping", the conductivity is changed from an insulator to a conductor. In addition to the characteristics of metal (high conductivity) and semiconductor, conductive polymers also retain the characteristics of polymer structures such as diversification, processability and low specific gravity. In addition, the biggest feature of conductive polymers is that the conductivity can be In the insulator-semiconductor-metal state (10 -9 ~10 5 S / cm) changes in a wide range, which is currently unattainable for any other material. [0003] Polypyrrole is a ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J7/16C08G73/06H01B3/00B01J19/00C03C17/32C04B41/46
Inventor 胡明沈腊珍张之圣古美良田斌阎实
Owner TIANJIN UNIV
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