Mechanism of conductivity decay of polypyrrole exposed to water and enhancement of conductivity stability of copper(I)-modified polypyrrole

Y. C. Liu, B. J. Hwang

研究成果: 雜誌貢獻文章

57 引文 (Scopus)

摘要

The degradation of polypyrrole (PPy)-based films was examined in a 50% relative humidity and oxygen free atmosphere for 50 days. The results reveal that polymerization potential, modification of PPy with Cu(I), and treatment of PPy with water in preparation, demonstrate significant influences on the conductivity and the corresponding stability of PPy. PPy prepared at an over-oxidizing potential and treated with water for 0.5 h exhibits a serious decrease in conductivity by about 93%, whereas the Cu-modified PPy becomes more stable. This is attributed to electron transfer from Cu to the N+ of PPy. The concept of fixed and removable water adsorbed on PPy is introduced to explain the experimental results. Also, an aging mechanism involving the interaction between H2O and PPy is proposed to explain the decay in conductivity.

原文英語
頁(從 - 到)100-106
頁數7
期刊Journal of Electroanalytical Chemistry
501
發行號1-2
DOIs
出版狀態已發佈 - 三月 23 2001
對外發佈Yes

指紋

Polypyrroles
Copper
Water
polypyrrole
Atmospheric humidity
Aging of materials
Polymerization
Oxygen
Degradation
Electrons

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

引用此文

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abstract = "The degradation of polypyrrole (PPy)-based films was examined in a 50{\%} relative humidity and oxygen free atmosphere for 50 days. The results reveal that polymerization potential, modification of PPy with Cu(I), and treatment of PPy with water in preparation, demonstrate significant influences on the conductivity and the corresponding stability of PPy. PPy prepared at an over-oxidizing potential and treated with water for 0.5 h exhibits a serious decrease in conductivity by about 93{\%}, whereas the Cu-modified PPy becomes more stable. This is attributed to electron transfer from Cu to the N+ of PPy. The concept of fixed and removable water adsorbed on PPy is introduced to explain the experimental results. Also, an aging mechanism involving the interaction between H2O and PPy is proposed to explain the decay in conductivity.",
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AU - Hwang, B. J.

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N2 - The degradation of polypyrrole (PPy)-based films was examined in a 50% relative humidity and oxygen free atmosphere for 50 days. The results reveal that polymerization potential, modification of PPy with Cu(I), and treatment of PPy with water in preparation, demonstrate significant influences on the conductivity and the corresponding stability of PPy. PPy prepared at an over-oxidizing potential and treated with water for 0.5 h exhibits a serious decrease in conductivity by about 93%, whereas the Cu-modified PPy becomes more stable. This is attributed to electron transfer from Cu to the N+ of PPy. The concept of fixed and removable water adsorbed on PPy is introduced to explain the experimental results. Also, an aging mechanism involving the interaction between H2O and PPy is proposed to explain the decay in conductivity.

AB - The degradation of polypyrrole (PPy)-based films was examined in a 50% relative humidity and oxygen free atmosphere for 50 days. The results reveal that polymerization potential, modification of PPy with Cu(I), and treatment of PPy with water in preparation, demonstrate significant influences on the conductivity and the corresponding stability of PPy. PPy prepared at an over-oxidizing potential and treated with water for 0.5 h exhibits a serious decrease in conductivity by about 93%, whereas the Cu-modified PPy becomes more stable. This is attributed to electron transfer from Cu to the N+ of PPy. The concept of fixed and removable water adsorbed on PPy is introduced to explain the experimental results. Also, an aging mechanism involving the interaction between H2O and PPy is proposed to explain the decay in conductivity.

KW - Adsorption

KW - Conductivity

KW - Polypyrrole

KW - X-ray photoelectron spectroscopy

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