用于可拉伸透明导电电极和加热器的可持续蓖麻油衍生交联聚（酯-氨基甲酸酯）弹性薄膜

IF 12.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Central Science Pub Date : 2024-11-06 DOI:10.1039/d4ta05338a

Timo Johannes Laukkanen, Pulikanti Guruprasad Reddy, Amit Barua, Manish Kumar, Kristofer Kolpakov, Teija Tirri, Vipul Sharma

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引用次数: 0

摘要

基底对于柔性和可拉伸设备至关重要，要求具有可持续性、可拉伸性、透明度、热稳定性和化学稳定性。本研究介绍了一种可持续交联聚（蓖麻油-δ-戊内酯）环己基氨基甲酸乙酯（PCVU）基底，用于基于应变传感器和加热器的柔性、可拉伸透明导电电极（TCE）。PCVU 是通过聚（蓖麻油-δ-戊内酯）三醇和 4,4′-亚甲基双（环己基异氰酸酯）在玻璃模具上的热交联聚合反应合成的，具有高透明度（90%）、可拉伸性（190%）和热稳定性（约 210°C）。PCVU 在各种有机溶剂中表现出良好的化学稳定性，在碱性介质（pH=14）中 72 天即可完全降解。我们利用 PCVU 制作了一种坚固、柔韧、可拉伸的 TCE，其薄层电阻较低（50 Ω sq-1）。TCE 的制造工艺包括应用电纺聚乙烯醇（PVA）层作为流平剂，以提高银纳米线（AgNW）的附着力，并利用基于热的纳米焊接技术来增强耐久性和机械稳定性。基于 TCE 的应变传感器在 5-15% 的应变下显示出稳定且可重复的电阻变化（ΔR/R0），在 5%应变下 100 个周期内响应快速且信号稳定。柔性加热器在 5.5V 电压下的最高温度可达约 150°C，加热和冷却响应迅速（各 15 秒）。实际应用包括用于实时监测人体运动（手指、手腕、肘部和颈部弯曲）的应变传感器，以及用作手腕和手指热疗垫的加热器，证明了基于 PCVU 的 TCE 在可穿戴设备和医疗设备中的应用潜力。

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Sustainable Castor Oil-derived Cross-linked Poly(ester-urethane) Elastomeric Films for Stretchable Transparent Conductive Electrodes and Heaters

Substrates are essential for flexible and stretchable devices, requiring sustainability, stretchability, transparency, thermal stability, and chemical stability. This study introduces a sustainable cross-linked poly(castor oil-co-δ-valerolactone) cyclohexyl urethane (PCVU) substrate for flexible, stretchable transparent conducting electrodes (TCEs) based strain sensors and heaters. PCVU is synthesized as a highly transparent (>90%), stretchable (>190%), and thermally stable (~210°C) substrate via thermal cross-link polymerization of poly(castor oil-co-δ-valerolactone) triol and 4,4′-methylenebis(cyclohexyl isocyanate) on a glass mold. PCVU exhibits good chemical stability in various organic solvents and degrades completely in 72 days in an alkaline medium (pH = 14). Using PCVU, we fabricated a robust, flexible, and stretchable TCE with low sheet resistance (<50 Ω sq-1). The TCE fabrication process includes applying an electrospun polyvinyl alcohol (PVA) layer as a leveling agent to improve the adhesion of silver nanowires (AgNW) and utilizing a heat-based nano-welding technique to enhance durability and mechanical stability. The TCE-based strain sensor showed stable and repeatable resistance changes (ΔR/R0) under 5-15% strains, with fast response and consistent signal stability over 100 cycles at 5% strain. The flexible heater reached a maximum temperature of ~150°C at 5.5V, with rapid heating and cooling responses (15 s each). Practical applications include a strain sensor for real-time monitoring of human motion (finger, wrist, elbow, and neck flexion) and a heater used as a thermotherapy pad for the wrist and finger, demonstrating the potential of PCVU-based TCEs for wearable and medical devices.

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来源期刊

ACS Central Science Chemical Engineering-General Chemical Engineering

CiteScore

25.50

自引率

0.50%

发文量

194

审稿时长

10 weeks

期刊介绍： ACS Central Science publishes significant primary reports on research in chemistry and allied fields where chemical approaches are pivotal. As the first fully open-access journal by the American Chemical Society, it covers compelling and important contributions to the broad chemistry and scientific community. "Central science," a term popularized nearly 40 years ago, emphasizes chemistry's central role in connecting physical and life sciences, and fundamental sciences with applied disciplines like medicine and engineering. The journal focuses on exceptional quality articles, addressing advances in fundamental chemistry and interdisciplinary research.