当前位置: X-MOL 学术J. Mol. Struct. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Spectroscopic and Thermal Analyses for the Effect of Acetic Acid on the Plasticized Sodium Carboxymethyl Cellulose
Journal of Molecular Structure ( IF 4.0 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.molstruc.2020.129013
Rania Badry , Hend A. Ezzat , Sherif El-Khodary , Mohamed Morsy , Hanan Elhaes , Nadra Nada , Medhat Ibrahim

Abstract Solid polymer electrolytes (SPEs) based on sodium carboxymethyl cellulose (CMC) mixed with different percentages of acetic acid and constant percentage of glycerol (Gly) as a plasticizer, to enhance electrical properties, are prepared using casting technique. Then, the prepared SPE films are characterized using Ultraviolet-Visible spectroscopy (UV–Vis.), Fourier Transform Infrared spectroscopy (FTIR), Nuclear Magnetic Resonance (NMR), Scanning electron microscope (SEM) and Electrical Impedance Spectroscopy (EIS). Also, thermal properties of the studied SPEs are studied using Thermo Gravimetric Analyzer (TGA) and its derivative (DTA). The obtained results of UV–Vis. study indicated that the prepared samples possesses three optical band gaps and that the optical band gaps decreased due to increasing acetic acid concentration up to 5 wt.%. FTIR results predict the presence of new absorption band around 1693 cm-1. Acetic acid/CMC interaction is further described by 1HNMR indicating chemical shift in carbonyl carbon (C = O) in some samples and disappearing of it in another samples. Meanwhile, EIS results indicated that the highest ionic conductivity obtained equals 7.64E-06 S/cm at room temperature for sample A3. Finally, TGA curves showed that the thermal stability is changed with changing acid concentration and three stages of weight loss are observed. The obtained results indicated that CMC-Gly-acetic acid SPEs is a perfect choice to be used as a solid polymer electrolyte since the electrical properties of CMC are improved.

中文翻译:

乙酸对塑化羧甲基纤维素钠影响的光谱和热分析

摘要 采用浇铸技术制备了基于羧甲基纤维素钠 (CMC) 与不同百分比的乙酸和恒定百分比的甘油 (Gly) 作为增塑剂的固体聚合物电解质 (SPEs),以提高电性能。然后,制备的 SPE 薄膜使用紫外-可见光谱 (UV-Vis.)、傅里叶变换红外光谱 (FTIR)、核磁共振 (NMR)、扫描电子显微镜 (SEM) 和电阻抗光谱 (EIS) 进行表征。此外,使用热重分析仪 (TGA) 及其衍生物 (DTA) 研究了所研究 SPE 的热性能。获得的 UV-Vis 结果。研究表明,制备的样品具有三个光学带隙,并且由于乙酸浓度增加至 5 wt.%,光学带隙减小。FTIR 结果预测在 1693 cm-1 附近存在新的吸收带。乙酸/CMC 相互作用通过 1HNMR 进一步描述,表明某些样品中羰基碳 (C = O) 的化学位移和其他样品中羰基碳的消失。同时,EIS 结果表明样品 A3 在室温下获得的最高离子电导率等于 7.64E-06 S/cm。最后,TGA 曲线表明热稳定性随酸浓度的变化而变化,并观察到三个阶段的失重。所得结果表明,CMC-Gly-乙酸SPEs 是用作固体聚合物电解质的完美选择,因为CMC 的电性能得到了改善。乙酸/CMC 相互作用通过 1HNMR 进一步描述,表明某些样品中羰基碳 (C = O) 的化学位移和其他样品中羰基碳的消失。同时,EIS 结果表明样品 A3 在室温下获得的最高离子电导率等于 7.64E-06 S/cm。最后,TGA 曲线表明热稳定性随酸浓度的变化而变化,并观察到三个阶段的失重。所得结果表明,CMC-Gly-乙酸SPEs 是用作固体聚合物电解质的完美选择,因为CMC 的电性能得到了改善。乙酸/CMC 相互作用通过 1HNMR 进一步描述,表明某些样品中羰基碳 (C = O) 的化学位移和其他样品中羰基碳的消失。同时,EIS 结果表明样品 A3 在室温下获得的最高离子电导率等于 7.64E-06 S/cm。最后,TGA 曲线表明热稳定性随酸浓度的变化而变化,并观察到三个阶段的失重。所得结果表明,CMC-Gly-乙酸SPEs 是用作固体聚合物电解质的完美选择,因为CMC 的电性能得到了改善。TGA 曲线显示热稳定性随酸浓度的变化而变化,并观察到三个阶段的失重。所得结果表明,CMC-Gly-乙酸SPEs 是用作固体聚合物电解质的完美选择,因为CMC 的电性能得到了改善。TGA 曲线显示热稳定性随酸浓度的变化而变化,并观察到三个阶段的失重。所得结果表明,CMC-Gly-乙酸SPEs 是用作固体聚合物电解质的完美选择,因为CMC 的电性能得到了改善。
更新日期:2021-01-01
down
wechat
bug