TY - JOUR
T1 - P(VDF-TrFE)/PVP/ionic liquid-based piezo-ionic polymer blend for touch sensing applications
AU - Panwar, Varij
AU - Khanduri, Priya
AU - Ansari, Mohd Umer
AU - Anoop, Gopinathan
AU - Park, Sukho
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - Ionic polymers (IPs) have been in high demand for application in piezoresistive sensors, ionic skins, humidity sensors, and wearable sensors owing to their high flexibility, hydrophilicity, and ionic conductivity. However, IP sensors produced low-power densities (nW/cm2 ∼ µW /cm2) even at high applied pressures (40–100 MPa), which are insufficient for practical applications such as portable chargers. Here, a piezo-ionic polymer blend (PIPB) sensor is developed using poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE)/ polyvinylpyrrolidone (PVP)/1-butyl-3-methylimidazolium-hydrogen sulfate (acidic ionic liquid, AIL) blend ratio of 30/15/55 with microrods (diameter of 0.2–0.7 µm) and pores (diameter of 1.2–4 µm) structure that generates an output voltage of 24 V and current density of 2.35 A/cm2, resulting in a high power density of 3 W/cm2 with an applied pressure of 200 Pa. The PIPB sensor also generates an output voltage of 6.5 V with a finger-tapping pressure of 47 Pa, which was utilized to power LEDs. With notable features of high tensile strain % of 3471 of the PIPB sensor, it detects pulses and a finger movement of 0–180º from a human body, generating output voltages of 1 and 8 V. The present study demonstrates the PIPB sensor's potential application in energy-harvesting and wearable devices requiring high power densities.
AB - Ionic polymers (IPs) have been in high demand for application in piezoresistive sensors, ionic skins, humidity sensors, and wearable sensors owing to their high flexibility, hydrophilicity, and ionic conductivity. However, IP sensors produced low-power densities (nW/cm2 ∼ µW /cm2) even at high applied pressures (40–100 MPa), which are insufficient for practical applications such as portable chargers. Here, a piezo-ionic polymer blend (PIPB) sensor is developed using poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE)/ polyvinylpyrrolidone (PVP)/1-butyl-3-methylimidazolium-hydrogen sulfate (acidic ionic liquid, AIL) blend ratio of 30/15/55 with microrods (diameter of 0.2–0.7 µm) and pores (diameter of 1.2–4 µm) structure that generates an output voltage of 24 V and current density of 2.35 A/cm2, resulting in a high power density of 3 W/cm2 with an applied pressure of 200 Pa. The PIPB sensor also generates an output voltage of 6.5 V with a finger-tapping pressure of 47 Pa, which was utilized to power LEDs. With notable features of high tensile strain % of 3471 of the PIPB sensor, it detects pulses and a finger movement of 0–180º from a human body, generating output voltages of 1 and 8 V. The present study demonstrates the PIPB sensor's potential application in energy-harvesting and wearable devices requiring high power densities.
KW - High ductile nature
KW - Mild force
KW - P(VDF-TrFE) microrod
KW - PVP
KW - Piezo-ionic polymer blend
KW - Voltage generation
UR - http://www.scopus.com/inward/record.url?scp=85172869649&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2023.114680
DO - 10.1016/j.sna.2023.114680
M3 - Article
AN - SCOPUS:85172869649
SN - 0924-4247
VL - 362
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
M1 - 114680
ER -