Formation Mechanism of Self-Assembled Polyaniline Micro/Nanotubes

Formation Mechanism of Self-Assembled Polyaniline Micro/Nanotubes

Self-assembled micro/nanotubes (650−76 nm in diameter) of polyaniline (PANI) were synthesized in the presence of β-naphthalene sulfonic acid (β-NSA) as a dopant. It was found that the diameter and room-temperature conductivity of the PANI−NSA tubes decreased with the decrease of the molar ratio of β...

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Veröffentlicht in:Langmuir 2002-02, Vol.18 (3), p.917-921
Hauptverfasser: Wei, Zhixiang, Zhang, Zhiming, Wan, Meixiang
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creator Wei, Zhixiang
Zhang, Zhiming
Wan, Meixiang
description Self-assembled micro/nanotubes (650−76 nm in diameter) of polyaniline (PANI) were synthesized in the presence of β-naphthalene sulfonic acid (β-NSA) as a dopant. It was found that the diameter and room-temperature conductivity of the PANI−NSA tubes decreased with the decrease of the molar ratio of β-NSA to aniline. On the bases of the results obtained from X-ray diffraction (XRD) and dynamic lighting scattering (DLS), it was proposed that when the molar ratio of β-NSA to aniline was high (e. g. 2), the NSA−An salt precipitate formed by β-NSA and aniline played a “template-like” role in forming the PANI−NSA tubes, while the “template-like” role was played by the NSA−An micelle when the ratio is low (e.g., 1/2 or 1/4).
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