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<p>Piezoelectric polymers such as polyvinylidene fluoride (PVDF) play an important role in sensor applications such as pressure or tactile sensors. This study investigates the electroactivity and sensing applications of pristine PVDF membranes spin-coated under gravity conditions ranging from 1 to 500g experimentally. The membranes’ microstructures are observed and characterized by SEM and FTIR. Percentages of the electroactive β and γ phases are evaluated which shows a sharp increase from 64% for the membrane spin-coated under 1g to around 90% for the membranes spin-coated under higher gravity conditions. Tactile sensors based on the fabricated membranes are designed and assembled. The output signals of the sensors under various touching conditions are simultaneously monitored through microelectronics engineering by computer aid. The sensitivity of the fabricated tactile sensors based on a created parameter called duty range is evaluated. The evaluated percentages of membranes’ electroactive phases from material science engineering and the sensitivity of tactile sensors based on their duty range are compared and discussed. Both measurements show that the elevation of gravity leads to enhancements in both the electroactivity of PVDF membranes and the sensitivity of tactile sensors.</p>

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Electroactivity and signal monitoring of tactile sensors based on PVDF membranes two-axis spin-coated under gravity conditions

  • 期刊论文

  • 发表日期：

    2025年7月15日

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  • Soroosh Mahmoodi

摘要

Piezoelectric polymers such as polyvinylidene fluoride (PVDF) play an important role in sensor applications such as pressure or tactile sensors. This study investigates the electroactivity and sensing applications of pristine PVDF membranes spin-coated under gravity conditions ranging from 1 to 500g experimentally. The membranes’ microstructures are observed and characterized by SEM and FTIR. Percentages of the electroactive β and γ phases are evaluated which shows a sharp increase from 64% for the membrane spin-coated under 1g to around 90% for the membranes spin-coated under higher gravity conditions. Tactile sensors based on the fabricated membranes are designed and assembled. The output signals of the sensors under various touching conditions are simultaneously monitored through microelectronics engineering by computer aid. The sensitivity of the fabricated tactile sensors based on a created parameter called duty range is evaluated. The evaluated percentages of membranes’ electroactive phases from material science engineering and the sensitivity of tactile sensors based on their duty range are compared and discussed. Both measurements show that the elevation of gravity leads to enhancements in both the electroactivity of PVDF membranes and the sensitivity of tactile sensors.