Rahman Md Ashiqur, Rubaiya Fariha, Islam Nazmul, Lozano Karen, Ashraf Ali
Department of Mechanical Engineering, University of Texas Rio Grande Valley, Edinburg, Texas78539, United States.
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia30332, United States.
ACS Appl Mater Interfaces. 2022 Aug 24;14(33):38162-38171. doi: 10.1021/acsami.2c09045. Epub 2022 Aug 12.
Forcespinning is a powerful technique to produce fiber systems with suitable properties for a vast array of applications. This study investigates the sensing and energy generation performance of PVDF/PAni fiber mat systems made by the forcespinning method with and without graphene coating. The developed fiber mats were coated with graphene nanoflakes by drop-casting. The graphene-coated nanocomposites show an average output voltage of 75 mV (peak-to-peak), which is 300% higher compared to bare fiber mats, and an output current of 24 mA (peak-to-peak) by gentle finger pressing. Moreover, graphene-coated PVDF/PAni showed a volume conductivity of 1.2 × 10 S/cm and was investigated as a promising system for temperature (5 times better sensitivity than normal fiber mat), vibration (2 times better voltage generation), and airflow sensing. The graphene-coated composite has been further investigated as a water tide energy harvesting piezoelectric nanogenerator, with the system generating ∼40 mV for a synthetic ocean wave with a flow rate of 30 mL/min. In the future, graphene-coated nanofiber mats can be a solution for low-powered sensors and to harvest blue energy and vibration energy.
强制纺丝是一种强大的技术，可用于生产具有适合广泛应用的特性的纤维系统。本研究调查了通过强制纺丝法制备的有或没有石墨烯涂层的聚偏氟乙烯/聚苯胺纤维毡系统的传感和能量产生性能。通过滴铸法在制备的纤维毡上涂覆石墨烯纳米片。石墨烯涂层的纳米复合材料在轻轻手指按压下显示出平均输出电压为75 mV（峰峰值），比裸纤维毡高300%，输出电流为24 mA（峰峰值）。此外，石墨烯涂层的聚偏氟乙烯/聚苯胺显示出体积电导率为1.2×10 S/cm，并被研究作为一种有前景的用于温度（灵敏度比普通纤维毡高5倍）、振动（发电电压高2倍）和气流传感的系统。石墨烯涂层复合材料已被进一步研究作为一种潮汐能收集压电纳米发电机，该系统在流速为30 mL/min的合成海浪作用下可产生约4 mV的电压。未来，石墨烯涂层的纳米纤维毡可成为低功耗传感器以及收集蓝色能源和振动能量的解决方案。
