Javed Zafar, Rafiq Lybah, Nazeer Muhammad Anwaar, Siddiqui Saqib, Ramzan Muhammad Babar, Khan Muhammad Qamar, Naeem Muhammad Salman
School of Arts and Design, National Textile University, 37610, Faisalabad, Pakistan.
School of Engineering and Technology, National Textile University, 37610, Faisalabad, Pakistan.
Beilstein J Nanotechnol. 2022 Feb 7;13:192-200. doi: 10.3762/bjnano.13.14. eCollection 2022.
Piezoelectric materials have attracted more attention than other materials in the field of textiles. Piezoelectric materials offer advantages as transducers, sensors, and energy-harvesting devices. Commonly, ceramics and quartz are used in such applications. However, polymeric piezoelectric materials have the advantage that they can be converted into any shape and size. In smart textiles, polyvinylidene fluoride (PVDF) and other piezoelectric polymers are used in the form of fibers, filaments, and composites. In this research, PVDF nanofibers were developed and integrated onto a knitted fabric to fabricate a piezoelectric device for human body angle monitoring. Scanning electron microscopy and X-ray diffraction analyses were used to study the morphology and to confirm the beta phase in fibers. The results reveal that the nanofibers made from solutions with high concentration were smooth and defect-free, compared to the fibers obtained from solutions with low concentration, and possess high crystallinity as well. Under high dynamic strain more output voltage is generated than under low dynamic strain. The maximum current density shown by the device is 172.5 nA/cm. The developed piezoelectric nanofiber sensor was then integrated into a knitted fabric through stitching to be used for angle measurement. With increasing bending angle, the output voltage increased. The promising results show that the textile-based piezoelectric sensor developed in this study has a great potential to be used as an angle measuring wearable device for the human body due to its high current density output and flexibility.
在纺织领域，压电材料比其他材料更受关注。压电材料作为换能器、传感器和能量收集装置具有诸多优势。通常，陶瓷和石英用于此类应用。然而，聚合物压电材料具有可加工成任何形状和尺寸的优势。在智能纺织品中，聚偏氟乙烯（PVDF）和其他压电聚合物以纤维、长丝和复合材料的形式使用。在本研究中，开发了PVDF纳米纤维并将其集成到针织物上，以制造用于人体角度监测的压电器件。利用扫描电子显微镜和X射线衍射分析来研究形态并确认纤维中的β相。结果表明，与低浓度溶液制备的纤维相比，高浓度溶液制备的纳米纤维表面光滑且无缺陷，并且具有高结晶度。在高动态应变下比在低动态应变下产生更多的输出电压。该器件显示的最大电流密度为172.5 nA/cm²。然后通过缝合将开发的压电纳米纤维传感器集成到针织物中用于角度测量。随着弯曲角度的增加，输出电压升高。这些有前景的结果表明，本研究中开发的基于纺织品的压电传感器因其高电流密度输出和柔韧性而具有作为人体角度测量可穿戴设备的巨大潜力。
