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Preparation and characterization of conductive chitosan-poly[N-(3-trimethoxysilylpropyl)aniline] hybrid submicrostructures

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Abstract

Conducting hybrid submicrostructures composed of chitosan (CS and silica-based conducting poly[N-(3-trimethoxysilylpropyl)aniline] (PTMSPA were prepared by graft copolymerization. The spherical and fibrous morphologies of the CS-PTMSPA hybrid submicrostructures could be observed by optical and field emission electron microscopy. Under room temperature conditions, the CS-PTMSPA graft copolymers possessed the uniformly distributed spherical submicroparticles with diameters in the range of ca. 400–1,000 nm. On the other hand, under ice cold conditions (5 °C), CS-PTMSPA showed the development of randomly oriented fiber bundles. The diameter of a single fiber was in the range of ca. 100–500 nm. These CS-PTMSPA fibers were obtained by a temperature-driven template-free self-assembly pathway. Spectroscopic and thermal evaluations confirmed that CS-PTMSPA graft copolymer had been prepared by an oxidative polymerization method. The electrochemical performance of the CS-PTMSPA submicrostructures were compared with CS and PTMSPA by cyclic voltammetry with the Fe(CN)6 3−/4− system as a redox marker. The CS-PTMSPA submicrostructures showed high electrical conductivity (difference between the anodic and cathodic peaks = 0.24 and 0.29 V for CS-PTMSPA sphere and fiber, respectively compared to those of CS (0.14 V and PTMSPA (0.20 V), which was ascribed to the relatively high surface-to-volume ratios of these submicrostructures.

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Authors and Affiliations

  1. Department of Textile System Engineering, Kyungpook National University, Daegu, 702-701, Korea

    Palanisamy Gomathi & Han Do Ghim

  2. Department of Chemical Engineering, Kyungpook National University, Daegu, 702-701, Korea

    Dhanusuraman Ragupathy

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  1. Palanisamy Gomathi
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  2. Han Do Ghim
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  3. Dhanusuraman Ragupathy
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Correspondence to Han Do Ghim.

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Gomathi, P., Ghim, H.D. & Ragupathy, D. Preparation and characterization of conductive chitosan-poly[N-(3-trimethoxysilylpropyl)aniline] hybrid submicrostructures. Macromol. Res. 19, 442–447 (2011). https://doi.org/10.1007/s13233-011-0515-7

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  • DOI: https://doi.org/10.1007/s13233-011-0515-7

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