2021
DOI: 10.3390/s21175760
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A Flexible Strain Sensor Based on Embedded Ionic Liquid

Abstract: We present a simple-structured strain sensor based on a low-cost ionic liquid. The ionic liquid was made of sodium chloride/propylene glycol solution and was embedded in a linear microfluidic channel fabricated using Ecoflex. The proposed sensor is capable of measuring strain up to 100% with excellent repeatability. The highest gauge factor is obtained as 6.19 under direct current excitation and 3.40 under alternating current excitation at 1 kHz. The sensor shows negligible hysteresis and overshoot, and surviv… Show more

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Cited by 16 publications
(7 citation statements)
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“…S14, ESI†). The ultralow DH values of our PTFEA50-BMIM ionogel sensors are superior to most reported IL-based soft strain sensors 57,61–65 (Fig. 5f).…”
Section: Resultsmentioning
confidence: 56%
“…S14, ESI†). The ultralow DH values of our PTFEA50-BMIM ionogel sensors are superior to most reported IL-based soft strain sensors 57,61–65 (Fig. 5f).…”
Section: Resultsmentioning
confidence: 56%
“… Breathing monitors: Ionic liquid-based wearable strain sensors were also reported to monitor the breathing events of patients with COPD or sleep apnoea. Stomach attachment of IL-based wearable breath rate sensors would provide alarms during dangerous breath variations or apnoea [ 34 ]. Sensors for cardiovascular parameters: Ionic liquid-based wearable devices were reported for ECG and EMG recordings [ 35 ].…”
Section: Developments In Medical Devices and Allied Technologies Towa...mentioning
confidence: 99%
“…Zhang and co-workers encapsulated organic electrolytes in Ecoflex microchannels to prepare a flexible strain sensor. 80 By attaching it to the abdomen, it could not only detect different types of breathing events but also identify dangerous processes for apnea (Fig. 10a).…”
Section: Breathing-related Sensorsmentioning
confidence: 99%