Mustapa Siti Rosnah, Aung Min Min, Rayung Marwah
Department of Chemistry, Faculty of Science, University Putra Malaysia, Serdang 43400, Selangor, Malaysia.
Unit of Chemistry, Centre of Foundation Studies for Agriculture Science, University Putra Malaysia, Serdang 43400, Selangor, Malaysia.
Polymers (Basel). 2020 Dec 30;13(1):132. doi: 10.3390/polym13010132.
In this paper, we report the preparation of bio-based polyurethane (PU) from renewable vegetable oil. The PU was synthesized through the reaction between jatropha oil-based polyol and isocyanate in a one-shot method. Then, lithium perchlorate (LiClO) salt was added to the polyurethane system to form an electrolyte film via a solution casting technique. The solid polymer electrolyte was characterized through several techniques such as nuclear magnetic resonance (NMR), Fourier transforms infrared (FTIR), electrochemical studies, thermal studies by differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). The NMR analysis confirmed that the polyurethane was successfully synthesized and the intermolecular reaction had occurred in the electrolytes system. The FTIR results show the shifting of the carbonyl group (C=O), ether and ester group (C-O-C), and amine functional groups (N-H) in PU-LiClO electrolytes compared to the blank polyurethane, which suggests that interaction occurred between the oxygen and nitrogen atom and the Li+ ion as they acted as electron donors in the electrolytes system. DSC analysis shows a decreasing trend in glass transition temperature, and melting point, of the polymer electrolyte as the salt content increases. Further, DMA analysis shows similar behavior in terms of . The ionic conductivity increased with increasing salt content until the optimum value. The dielectric analysis reveals that the highest conducting electrolyte has the lowest relaxation time. The electrochemical behavior of the PU electrolytes is in line with the result from the thermal analysis.
在本文中，我们报道了由可再生植物油制备生物基聚氨酯（PU）的过程。该聚氨酯是通过麻疯树油基多元醇与异氰酸酯以一步法反应合成的。然后，将高氯酸锂（LiClO）盐添加到聚氨酯体系中，通过溶液浇铸技术形成电解质膜。通过核磁共振（NMR）、傅里叶变换红外光谱（FTIR）、电化学研究、差示扫描量热法（DSC）进行的热研究以及动态力学分析（DMA）等多种技术对固体聚合物电解质进行了表征。NMR分析证实聚氨酯已成功合成，并且在电解质体系中发生了分子间反应。FTIR结果表明，与空白聚氨酯相比，PU-LiClO电解质中羰基（C=O）、醚和酯基（C-O-C）以及胺官能团（N-H）发生了位移，这表明氧和氮原子与Li+离子之间发生了相互作用，因为它们在电解质体系中充当电子供体。DSC分析表明，随着盐含量的增加，聚合物电解质的玻璃化转变温度和熔点呈下降趋势。此外，DMA分析在……方面显示出类似的行为。离子电导率随着盐含量的增加而增加，直至达到最佳值。介电分析表明，导电率最高的电解质具有最短的弛豫时间。PU电解质的电化学行为与热分析结果一致。
