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Impedance spectroscopy of chitosan/poly(vinyl alcohol) films

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Abstract

Polymer films were cast from aqueous solutions of chitosan (CS) and poly(vinyl alcohol) (PVA) in employing tetraethoxysilane (TEOS) as a crosslinking agent. Different amounts of TEOS were used and the presence of siloxane bond was confirmed by Fourier transform infrared (FTIR) spectroscopy. The swelling behavior of the films was determined by exploring the time-dependent swelling in distilled water. The swelling kinetics showed a linear increase and achieved maximum value within half an hour. The emergence of one arc in complex impedance plane plot exhibited the presence of one type of relaxation process. The ac conductivity was also calculated which was increased from 2.55 × 10−12 to 9.05 × 10−12 Ω−1cm−1 as the amount of crosslinker was increased from 2 to 6 %. Further increase in the amount of crosslinker (up to 10 %) reduced the conductivity to minimum value of 0.24 × 10−12 Ω−1cm−1. The novel properties of the biocompatible films can be utilized in biomedical applications concerning the biological systems which require smaller charge in medicinal apparatus, bioelectrodes coatings, etc.

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Acknowledgments

Dr. Atif Islam is highly obliged to the Higher Education Commission (HEC) of Pakistan for supporting this work.

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Authors and Affiliations

  1. Department of Polymer Engineering and Technology, University of the Punjab, Lahore, Pakistan

    Atif Islam, Aneela Sabir, Shahzad M. Khan & Tahir Jamil

  2. Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Sciences, P.O. Nilore, Islamabad, 45650, Pakistan

    Atif Islam & Tariq Yasin

  3. Physics Division, PINSTECH, P.O. Nilore, Islamabad, 45650, Pakistan

    Muhammad Javed Akhtar

  4. Department of Physics, COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad, 44000, Pakistan

    Zahid Imran

  5. Institute of Chemistry, University of the Punjab, Lahore, Pakistan

    Misbah Sultan

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  1. Atif Islam
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Correspondence to Atif Islam.

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Islam, A., Yasin, T., Akhtar, M.J. et al. Impedance spectroscopy of chitosan/poly(vinyl alcohol) films. J Solid State Electrochem 20, 571–578 (2016). https://doi.org/10.1007/s10008-015-3082-6

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  • DOI: https://doi.org/10.1007/s10008-015-3082-6

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