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Polymers 2015, 7(4), 747-759;

Characterization of Novel Castor Oil-Based Polyurethane Polymer Electrolytes

Institute of Graduate Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia
School of Chemical Sciences and Food Technology, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, 46300 Bangi, Selangor, Malaysia
Center for Foundation Studies in Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
Authors to whom correspondence should be addressed.
Academic Editor: Christine Wandrey
Received: 15 January 2015 / Revised: 23 March 2015 / Accepted: 10 April 2015 / Published: 16 April 2015
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Castor oil-based polyurethane as a renewable resource polymer has been synthesized for application as a host in polymer electrolyte for electrochemical devices. The polyurethane was added with LiI and NaI in different wt% to form a film of polymer electrolytes. The films were characterized by using attenuated total reflectance-Fourier transform infrared spectroscopy, dynamic mechanical analysis, electrochemical impedance spectroscopy, linear sweep voltammetry and transference number measurement. The highest conductivity of 1.42 × 10−6 S cm−1 was achieved with the addition of 30 wt% LiI and 4.28 × 10−7 S·cm−1 upon addition of 30 wt% NaI at room temperature. The temperature dependence conductivity plot indicated that both systems obeyed Arrhenius law. The activation energy for the PU-LiI and PU-NaI systems were 0.13 and 0.22 eV. Glass transition temperature of the synthesized polyurethane decreased from −15.8 °C to ~ −26 to −28 °C upon salts addition. These characterizations exhibited the castor oil-based polyurethane polymer electrolytes have potential to be used as alternative membrane for electrochemical devices. View Full-Text
Keywords: castor oil; polyol; polyurethane; polymer electrolytes castor oil; polyol; polyurethane; polymer electrolytes

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Ibrahim, S.; Ahmad, A.; Mohamed, N.S. Characterization of Novel Castor Oil-Based Polyurethane Polymer Electrolytes. Polymers 2015, 7, 747-759.

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