[논문]Recent Progress on Ionically Conductive Polymer Electrolyte for Electronic Skin Sensors

Kim, Jeong Hui; Jeong, Jung-Chae; Lee, Keun Hyung

doi:10.7473/ec.2021.56.3.117

Recent Progress on Ionically Conductive Polymer Electrolyte for Electronic Skin Sensors 원문보기

Elastomers and composites = 엘라스토머 및 콤포지트, v.56 no.3, 2021년, pp.117 - 123

Kim, Jeong Hui (Department of Chemical Engineering, Inha University) , Jeong, Jung-Chae (Industrial Policy Planning Department) , Lee, Keun Hyung (Department of Chemical Engineering, Inha University)

Abstract ▼ AI-Helper

Electronic skin (or E-skin) is an artificial smart skin composed of one or more than two sensors. E-skins detect external stimuli and convert them into electrical signals. Various types of E-skin sensors exist, including mechanical, physical, and chemical, depending on the detection signals involved. For wearable E-skins with superior sensitivity and reliability, developing conductors that possess both good elasticity and sensitivity is essential. Typical electrical conductors used in these sensors show very high sensitivity, but they have drawbacks such as non-linearity, irreversibility, and a narrow sensing range. To address these issues, stretchable and lightweight ionic conductors have been actively used in E-skin applications. This study summarizes the recent progress on various types of ionic conductors and ionic-conductor-based E-skin sensors.

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표/그림 (7)

그림 Figure 1. (a) Photograph of skin-attachable ion gel gas sensing sticker. Reproduced with permission.⁹ Copyright 2021, Wiley-VCH. (b) Hydrogel strain sensor attached to finger. (c) Hydrogel pressure sensor attached to back of hand. Reproduced with permission.¹⁰ Copyright 2014, Wiley-VCH. (d) 3-D printed chemical sensing tattoo. Reproduced with permission.¹² Copyright 2017, Wiley-VCH. (e) Temperature sensing hydrogel device. Reproduced with permission.¹¹ Copyright 2015, Wiley-VCH.
그림 Figure 2. (a) Undeformed hydrogel (top) and stretched hydrogel (bottom). Reproduced with permission.¹⁶ Copyright 2017, Springer Nature. (b) Shape change of the hydrogel and organogel in a vacuum chamber. (c) Relative resistance change versus strain using organogel strain sensor. Reproduced with permission.²⁴ Copyright 2018, American Chemical Society.
그림 Figure 3. (a) Schematics and chemical structures of self-healable micellar ion gel. (b) Photograph of cut and healed ion gel. (c) Strain-stress curves of self-healable ion gel with different healing times. Reproduced with permission.²⁷ Copyright 2018, Wiley-VCH.
그림 Figure 4. (a) Schematics of an organogel strain sensor before/after deformation. Relative resistance recorded by the organogel strain sensor. Sensors were attached to (b) index finger, (c) elbow, (d) knee, and (e) neck. Reproduced with permission.²⁴ Copyright 2018, American Chemical Society.
그림 Figure 5. (a) Schematics (top) and photographs of the zigzag ion gel sensor. (b) Relative resistance of the rectangular ion gel strain sensor. Real-time detection of human motions collected by the zigzag strain sensor attached to (c) knee and (d) neck. Reproduced with permission.³² Copyright 2021, Wiley-VCH.
그림 Figure 6. (a) Schematic of an ion-gel-based capacitive pressure sensor. (b) Capacitive change with various ionic liquid concentrations under 0.35 and 2 kPa. (c) Real-time capacitance responding to deep breathing and gulping recorded. Reproduced with permission.³³ Copyright 2017, American Chemical Society.
그림 Figure 7. (a) Responses of the double network (DN) hydrogel sensor to NH₃. (b) Comparison of relative resistance change of DN and DN-Gly sensors to NO₂. Reproduced with permission.³⁶ Copyright 2019, American Chemical Society. (c) Dynamic response of the ion gel gas sensor to NO₂. (d) NO₂ sensing cycles collected by the ion gel gas sensor exposed to single gas and mixed gas. Reproduced with permission.⁹ Copyright 2021, Wiley-VCH.

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