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Gajula Prasad,Mir Muhammad Fahad,Reza Mohammad Shamim,김갑진,김홍두,Sellamuthu N. Jaisankar 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
The wearable self-powered tactile triboelectric sensor is a most promising candidate in the recent development of smart electronics which can recognize various physical stimuli without using any external power source. In this paper, triboelectric sensors are fabricated by using micron level rough structured silicone elastomer with different nonwoven fabrics (thermoplastic polyurethane (TPU) and polypropylene (PP)) and simultaneously compared with smooth silicone elastomer. The sensors fabricated by using rough silicon elastomers (56 V) with TPU (56 V) and PP (19 V) shows almost 8 and 6-times better peak to peak (Vp-p) than smooth one (7 V) and PP (3 V) sensors, respectively. Compared to PP with silicon sensor, the TPU with silicon sensor shows higher Vp-p voltages irrespective of roughness because TPU has a higher tribo-positive character than PP according to triboelectric series. These wearable triboelectric sensors have potential applications in sensing human motion monitoring.
Polyurethane/Polyvinylidene Fluoride Blend Electrospun Nanofiber Web Based Hybrid Tactile Sensor
Reza Mohammad Shamim,Mir Muhammad Fahad,Gajula Prasad,Sellamuthu N. Jaisankar,김갑진,김홍두 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Electrospun polyurethane (PU) nanofiber webs (NFw) having very high amount of nano-sized open cell can be used as a piezo-capacitive sensor due to excellent electrospinnability and very good elastic properties that has been reported in our previous study. In contrast, electrospun PVDF exhibits high β-crystalline phase content and superior piezoelectricity. Consequently, in this study, PU/PVDF blends under controlled compositions were electrospun to obtain PU/PVDF hybrid NFw. These hybrid sensors are capable of measuring piezocapacitive properties as well as simultaneously piezoelectric properties. Moreover, AgNO₃ was added into PVDF e-spun solution which acts as Ag-NPs in PVDF NFw to get enhanced piezoelectric performance of the hybrid sensor. Around 25% addition of PVDF into PU solution in the presence of Ag-NPs greatly enhance the peak-to-peak piezoelectric output voltage (Vp-p) along with 4.2% hysteresis and pressure-capacitance change of over 55 pF.