High-Precision Stretchable Ionic Temperature Sensor Passivated with a Liquid Metal/Block Copolymer Multilayer Film,ACS Applied Materials & Interfaces

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High-Precision Stretchable Ionic Temperature Sensor Passivated with a Liquid Metal/Block Copolymer Multilayer Film
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-06-02 , DOI: 10.1021/acsami.3c03811
Salma Faiz ₁ , Hyun Woo Kim ₁ , Joosung Oh ₁ , Selvaraj Veerapandian ₁ , Unyong Jeong ₁

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Moisture barriers are essential for ionic sensors because moisture has a direct impact on the stability and reliability of electrochemical properties. So far, stretchable moisture barriers that can maximize the advantage of using deformable ion gel as the active material have been rarely investigated and remain as a technological challenge. This study proposes a four-layer (4L) stretchable moisture barrier alternatively composed of a poly(styrene-isobutylene-styrene) copolymer (SiBS) film (2 μm in thickness) and a eutectic gallium-indium liquid metal (LM) film (1 μm in thickness). This multilayer barrier has a low water permeability of 9.09 × 10^–20 m²/Pa s at 50% uniaxial strain (ε) and retains the barrier properties at repeated stretchable cycles at ε = 50%. This study demonstrates a skin-attached precise ion gel-based temperature sensor that is independent of moisture change (even dipping in water) and body motions.

中文翻译：

用液态金属/嵌段共聚物多层膜钝化的高精度可拉伸离子温度传感器

防潮层对于离子传感器至关重要，因为水分对电化学性能的稳定性和可靠性有直接影响。到目前为止，很少研究可以最大限度地利用可变形离子凝胶作为活性材料的优势的可拉伸防潮层，这仍然是一项技术挑战。本研究提出了一种由聚（苯乙烯-异丁烯-苯乙烯）共聚物（SiBS）薄膜（厚度为 2 μm）和共晶镓-铟液态金属（LM）薄膜（1 μm 厚度）。这种多层屏障的透水性很低，仅为 9.09 × 10 ^–20 m ²/Pa s 在 50% 单轴应变 (ε) 下，并在 ε = 50% 的重复拉伸循环中保持阻隔特性。本研究展示了一种基于皮肤的精确离子凝胶温度传感器，它不受湿度变化（甚至浸入水中）和身体运动的影响。

更新日期：2023-06-02

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