Enuka Adaugo, Keblawi Mohamad, Sedar Emmet, Beachley Vince
Department of Chemical Engineering, Rowan University, Glassboro, New Jersey 08028, United States.
Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey 08028, United States.
ACS Appl Polym Mater. 2025 Apr 25;7(9):5429-5436. doi: 10.1021/acsapm.5c00069. eCollection 2025 May 9.
Electrospun poly(vinylidene fluoride--hexafluoropropylene) (PVDF-HFP) nanofibers possess desirable mechanical and piezoelectric properties, making them promising candidates for smart textiles if they can be assembled into continuous yarns. This study presents a manufacturing approach that enables the production of electrospun PVDF-HFP nanofiber yarns using an automated parallel track system and an adjustable roll-to-roll collector. Results show that this approach has potential for PVDF yarn manufacturing on a commercial scale. Electrospun yarns have previously been fabricated with self-bundling methods, but current technologies are limited by production limitations such as the lack of tight control over assembly parameters and the absence of a postdrawing process. Postdrawing was applied here to individual fibers before yarn spinning to enhance fiber strength by over two times and yarn strength by 39%. The piezoelectrical performance of yarns was enhanced by up to 45% with postdrawing. Continuous PVDF-HFP yarns with specific strength approaching 50,000 N m/kg and a relative β phase content of 97% are promising candidates for piezoelectric nanofiber-based smart textiles, which can be integrated into various wearable devices and intelligent garments.
静电纺聚偏氟乙烯-六氟丙烯（PVDF-HFP）纳米纤维具有理想的机械性能和压电性能，如果能将它们组装成连续纱线，使其有望成为智能纺织品的候选材料。本研究提出了一种制造方法，该方法能够使用自动平行轨道系统和可调节的卷对卷收集器来生产静电纺PVDF-HFP纳米纤维纱线。结果表明，这种方法具有在商业规模上制造PVDF纱线的潜力。静电纺丝纱线以前是用自捆扎方法制造的，但目前的技术受到生产限制，如对组装参数缺乏严格控制以及没有后拉伸工艺。这里在纱线纺丝前对单根纤维进行后拉伸，以使纤维强度提高两倍多，纱线强度提高39%。后拉伸使纱线的压电性能提高了45%。具有接近50,000 N m/kg的比强度和97%的相对β相含量的连续PVDF-HFP纱线是基于压电纳米纤维的智能纺织品的有前途的候选材料，可集成到各种可穿戴设备和智能服装中。
