Processable polyaniline–titanium dioxide nanocomposites: effect of titanium dioxide on the conductivity

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• 作者：Su ; Shi-Jian ; Kuramoto ; Noriyuki
• 关键词：Polyaniline ; Titanium dioxide ; Nanocomposite ; Processable
• 刊名：Synthetic Metals
• 出版年：2000
• 出版时间：August 1, 2000
• 年：2000
• 卷：114
• 期：2
• 页码：147-153
• 全文大小：163 K

文摘

‘In-situ’ polymerization was carried out in the presence of anatase titanium dioxide (TiO₂) to synthesize polyaniline/TiO₂ composite (PANI/TiO₂). Emeraldine base form of PANI/TiO₂ (PANI(EB)/TiO₂) composite was reprotonated with anionic surfactant to prepare homogeneous suspension in m-cresol and chloroform. Conductivity of reprotonated PANI/TiO₂ composite film cast from its suspension in m-cresol is higher than that of the film cast from its chloroform suspension due to well-extended conjugation chain of PANI. The anionic surfactant-coated TiO₂ suspension and doped PANI solution were combined to form homogeneous suspension and to cast free-standing nanocomposite films with the TiO₂ content up to 50 wt. % . Such processable PANI/TiO₂ nanocomposite has suitable conductivity (1–10 S/cm) when it is cast from the combined suspension, and it increases after thermal treatment at 80°C for 1 h. It is easy to manipulate the TiO₂ content by changing PANI/TiO₂ ratio. Also, the nanocomposite film has better quality.