Characterization of Novel Castor Oil-Based Polyurethane Polymer Electrolytes

Polymers

Salmiah Ibrahim¹  Azizan Ahmad²  Nor Sabirin Mohamed³ 

[1] 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; E-Mail:;Center for Foundation Studies in Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; E-Mail:

关键词: castor oil;    polyol;    polyurethane;    polymer electrolytes;   

DOI  :  10.3390/polym7040747

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.