Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites

doi:10.1088/1674-1056/20/5/058102

中国物理B ›› 2011, Vol. 20 ›› Issue (5): 58102-058102.doi: 10.1088/1674-1056/20/5/058102

Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites

Muhammad Javed Akhtar¹, Asma Binat Afzal²

(1)Physics Division, PINSTECH, P.O. Nilore, Islamabad 45650, Pakistan; (2)Physics Division, PINSTECH, P.O. Nilore, Islamabad 45650, Pakistan;Department of Chemical and Material Engineering, PIEAS, Islamabad 45650, Pakistan

收稿日期:2010-10-19 修回日期:2010-12-14 出版日期:2011-05-15 发布日期:2011-05-15

Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites

Asma Binat Afzal^a)b) and Muhammad Javed Akhtar^a)†

^a Physics Division, PINSTECH, P.O. Nilore, Islamabad 45650, Pakistan; ^b Department of Chemical and Material Engineering, PIEAS, Islamabad 45650, Pakistan

Received:2010-10-19 Revised:2010-12-14 Online:2011-05-15 Published:2011-05-15

摘要/Abstract

摘要： Polyaniline(PANI)/Ag nanocomposites, synthesized by incorporation of separately prepared silver nanoparticles in 1-methyl-2-pyrrolidinone(NMP) solution of PANI, have been aged at the accelerated temperature of 120 oC to simulate a storage period of 2 years at 25 oC. The accelerated ageing of these materials is done by using the activation energy calculated from data collected using heat flow calorimetry (HFC). The impedance spectroscopic studies of NMP plasticized aged nanocomposite films suggest a microphase separation into reduced and oxidized repeat units. There is crosslinking of the PANI films during ageing thereby obstructing the charge transfer between PANI chains and silver nanoparticles. As a result, the resistivity is increased.

关键词: polyaniline, Ag nanoparticles, impedance spectroscopy, ageing

Abstract: Polyaniline(PANI)/Ag nanocomposites, synthesized by incorporation of separately prepared silver nanoparticles in 1-methyl-2-pyrrolidinone(NMP) solution of PANI, have been aged at the accelerated temperature of 120 ℃ to simulate a storage period of 2 years at 25 ℃. The accelerated ageing of these materials is done by using the activation energy calculated from data collected using heat flow calorimetry (HFC). The impedance spectroscopic studies of NMP plasticized aged nanocomposite films suggest a microphase separation into reduced and oxidized repeat units. There is crosslinking of the PANI films during ageing thereby obstructing the charge transfer between PANI chains and silver nanoparticles. As a result, the resistivity is increased.

Key words: polyaniline, Ag nanoparticles, impedance spectroscopy, ageing

中图分类号: (Reinforced polymers and polymer-based composites)

81.05.Qk

82.35.Np (Nanoparticles in polymers) 84.37.+q (Measurements in electric variables (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.))

Asma Binat Afzal, Muhammad Javed Akhtar. Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites[J]. 中国物理B, 2011, 20(5): 58102-058102.

Asma Binat Afzal and Muhammad Javed Akhtar. Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites[J]. Chin. Phys. B, 2011, 20(5): 58102-058102.

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Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites

Investigation of ageing effects on the electrical properties of polyaniline/silver nanocomposites

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