Continuous production of piezoelectric PVDF fibre for e-textile applications

Hadimani, Ravi L.; Bayramol, Derman Vatansever; Sion, N.; Shah, Tahir; Li, Qian; Shao-xin, Shi; Σιώρης, Ηλίας

doi:10.1088/0964-1726/22/7/075017

Cited by 92 publications

(68 citation statements)

References 23 publications

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“…Phase transformation can be realized via poling with a much lower electric field by stretching in a certain extent before poling [25], or by applying in-situ stretching and poling [152]. It should pay attention to that poling treatment changes the membrane structure [3], and consequently the rejection [153], in addition to the polymorphs and permeability.…”

Section: Reproduced With Permission From Elsevier Ltdmentioning

confidence: 99%

Crystalline polymorphism in poly(vinylidenefluoride) membranes

Cui

Hassankiadeh

Zhuang

et al. 2015

Progress in Polymer Science

327

250

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Section: Reproduced With Permission From Elsevier Ltdmentioning

confidence: 99%

Crystalline polymorphism in poly(vinylidenefluoride) membranes

Cui

Hassankiadeh

Zhuang

et al. 2015

Progress in Polymer Science

327

250

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“…Electrospinning was chosen as the means for producing the piezoelectric PVDF–TrFE mats since fiber formation and piezoelectric poling occur simultaneously, unlike in processes such as fiber melt extrusion where a separate poling stage is needed The high electric field strengths in electrospinning are known to induce the phase transition from non polarized α ‐ phase to polarized β‐phase in PVDF–TrFE (Figure S3). The induced polarization direction in the as‐spun mats produces a strong piezoelectric response in the mat thickness direction (Figure S4).…”

Section: The Fpf Power Transferred To An External Load Can Be Estimatmentioning

confidence: 99%

Flexible, stretchable and weavable piezoelectric fiber

et al. 2015

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Various 'wearable technologies' for personal activity monitoring have recently been released to the consumer market with great success. The desire of developers of such devices to increase functionality while reducing size and weight is currently constrained by the energy demands of the on-board electronics. The ideal solution would be to harness electrical energy from the wearer, such as through heat or movement. Piezoelectric modules are attractive for converting mechanical energy to electrical energy and various flexible systems have been developed to capture energy from bending motions associated with heartbeat, [1,2] respiration, [3] muscle stretching, [4,5] and eye blinking. [6] Ideally, energy harvesting garments should be elastically stretchable as well as bendable to ensure a close fit, enhance wearer comfort, and increase the range of human motions accessible for energy recovery. Stretch fabrics gain their high strain elasticity from a combination of knitted fiber bending and stretching of highly elastic fibers, such as elastane, which provides a restoring force. What are needed are robust piezoelectric fibers that demonstrate both high flexibility and high stretchability for incorporation into smart garments.The fiber-based piezoelectric systems described to date have demonstrated only limited flexibility and very small extensibility. Kechiche et al. [7] and Lee et al. [8] have both developed coaxial fibers consisting of a layer of piezoelectric materials sandwiched between a conducting core and an outer sheath electrode. These fibers could be woven into a textile structure [7] and deformed by bending to a small strain of %0.1% [8] However, small radius bending as occurs in knitting and high strain elastic stretching were not yet demonstrated. Kim et al. [9] have recently described highly stretchable piezoelectric films formed by laminating polyvinylidene fluoride (PVDF) between a conducting, corrugated elastomeric substrate and a thin graphene layer. The laminate could be stretched to 30% without damage but fibers have not yet been prepared.Here we introduce a novel composite material system and a method for constructing flexible, stretchable and weavable piezoelectric energy-generating fibers. The flexible piezoelectric fibers (FPFs) can be stretched to a tensile strain of 5% and can generate over 50 mW/cm 3 . The FPFs are sufficiently robust for knotting, sewing, and weaving and can also be converted to piezoelectric coils by twist insertion. These spring-like coils can be reversibly stretched to 50% strain without failure.FPF energy generators were fabricated in a four stage process, as illustrated in Figure 1a, b. Firstly, electrospun mats were prepared from polyvinylidene fluoride-cotrifluoroethylene (PVDF-TrFE) as randomly oriented nanofibers of 750 nm average diameter (Figure 1c) and to a mat thickness of %30 mm. The electrospun mats were next manually wrapped around a multifilament silver coated nylon yarn that acted as the inner electrode. The outer electrode was formed by wrapping with carbo...

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“…Bulk PVDF has a failure strain in the range of 12% -50% 26, 27 . In addition, PVDF is biocompatible and is considered a highly attractive polymer for biomedical applications such as in smart catheter devices and as scaffold for tissue engineering 28,29,30 .…”

Section: Introductionmentioning

confidence: 99%

“…The β-phase is the most piezoelectrically responsive one. PVDF is mechanically stretched and electrically poled at very high voltage under elevated temperature (80-150°C) to align randomly oriented dipoles in the sample 27 .…”

Section: Introductionmentioning

confidence: 99%

High-Performance Coils and Yarns of Polymeric Piezoelectric Nanofibers

Baniasadi¹,

Huang²,

Xü³

et al. 2015

ACS Appl. Mater. Interfaces

117

108

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We report on highly stretchable piezoelectric structures of electrospun PVDF-TrFE nanofibers. We fabricated nanofibrous PVDF-TrFE yarns via twisting their electrospun ribbons. Our results show that the twisting process not only increases the failure strain but also increases overall strength and toughness. The nanofibrous yarns achieved a remarkable energy to failure of up to 98 J/g. Through overtwisting process, we fabricated polymeric coils out of twisted yarns that stretched up to ∼740% strain. This enhancement in mechanical properties is likely induced by increased interactions between nanofibers, contributed by friction and van der Waals interactions, as well as favorable surface charge (Columbic) interactions as a result of piezoelectric effect, for which we present a theoretical model. The fabricated yarns and coils show great promise for applications in high-performance lightweight structural materials and superstretchable piezoelectric devices and flexible energy harvesting applications.

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Continuous production of piezoelectric PVDF fibre for e-textile applications

Cited by 92 publications

References 23 publications

Crystalline polymorphism in poly(vinylidenefluoride) membranes

Crystalline polymorphism in poly(vinylidenefluoride) membranes

Flexible, stretchable and weavable piezoelectric fiber

High-Performance Coils and Yarns of Polymeric Piezoelectric Nanofibers

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