Self-Standing High-Performance Transparent Actuator Based on Poly(dimethylsiloxane)/TEMPO-Oxidized Cellulose Nanofibers/Ionic Liquid Gel
Self-Standing High-Performance Transparent Actuator Based on Poly(dimethylsiloxane)/TEMPO-Oxidized Cellulose Nanofibers/Ionic Liquid Gel
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DOI：
10.1021/acs.langmuir.0c00559
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发表时间：
2020-06-09
期刊：
影响因子：
3.9
通讯作者：
Terasawa, Naohiro
中科院分区：
文献类型：
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作者：
Terasawa, Naohiro
纤维素纳米纤维和离子液体（IL）在制造与薄电极相结合的透明凝胶电解质执行器中的可持续应用仍有待探索。因此，本研究开发了一种基于2,2,6,6-四甲基哌啶-1-氧基自由基氧化纤维素纳米纤维/IL/聚二甲基硅氧烷（TOCN/IL/PDMS）透明凝胶电解质的新型执行器。采用浇铸法制备凝胶电解质膜，并采用喷涂法涂覆薄电极。基于其机电和电化学性能，TOCN/IL/PDMS凝胶电解质致动器具有高应变性能。执行器的操作机构基于静电双层电容器（EDLC）和法拉第电容器机构，其中EDLC机构的影响更强。确定了执行器的位移响应频率依赖性，并使用双层充电动力学模型模拟了所获得的结果。凝胶电解质和电极电阻的组合与实验数据吻合良好，单独的凝胶电解质电阻也是如此。通过设计具有高离子和电导率的电解质（主要）和电极，可以进一步提高基于 TOCN/IL/PDMS 电解质的聚合物致动器的性能。这些薄膜具有柔韧性、坚固性和透明性，可能具有作为电子和能量转换设备中执行器材料的潜力，这些设备需要可穿戴和透明。
The sustainable application of cellulose nanofibers and ionic liquids (ILs) in the fabrication of transparent gel electrolyte actuators combined with thin electrodes remains to be explored. Accordingly, this study developed a new actuator on the basis of a 2,2,6,6-tetramethylpiperidine-1-oxyl radical-oxidized cellulose nanofibers/IL/poly(dimethylsiloxane) (TOCN/IL/PDMS) transparent gel electrolyte. A casting method was employed to prepare the gel electrolyte film, and spray-coating was used to apply thin electrodes. On the basis of its electromechanical and electrochemical properties, the TOCN/IL/PDMS gel electrolyte actuator had high strain performance. The actuator's operational mechanism is based on both electrostatic double-layer capacitor (EDLC) and Faradaic capacitor mechanisms, with the EDLC mechanism having a stronger influence. The actuator's displacement-response frequency dependency was determined, and we simulated the obtained findings by using a double-layer charging kinetic model. The combined gel electrolyte and electrode resistance resulted in a favorable fit to the experimental data, as did the gel electrolyte resistance alone. The performance of the TOCN/IL/PDMS-electrolyte-based polymer actuators can be improved further by designing electrolytes (primarily) and electrodes to have high ionic and electrical conductivities. The films-which are flexible, robust, and transparent-may have potential as actuator materials within electronic and energy-conversion devices that are required to be wearable and transparent.