Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 134, Issue 19, Pages -Publisher
WILEY
DOI: 10.1002/app.44813
Keywords
electrospinning; mechanical properties; nanoyarn; porosity
Categories
Funding
- National Science Foundation Partnerships for Innovation: Building Innovation Capacity (PFI:BIC) subprogram [1430212]
- National Institutes of Biomedical Imaging and Bioengineering of the National Institutes of Health [U01EB023035]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1537720] Funding Source: National Science Foundation
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1430212] Funding Source: National Science Foundation
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Higher ordered structures of nanofibers, including nanofiber-based yarns and cables, have a variety of potential applications, including wearable health monitoring systems, artificial tendons, and medical sutures. In this study, twisted assemblies of polyacrylonitrile (PAN), polyvinylidene fluoride trifluoroethylene (PVDF-TrFe), and polycaprolactone (PCL) nanofibers were fabricated via a modified electrospinning setup, consisting of a rotating cone-shaped copper collector, two syringe pumps, and two high voltage power supplies. The fiber diameters and twist angles varied as a function of the rotary speed of the collector. Mechanical testing of the yarns revealed that PVDF-TrFe and PCL yarns have a higher strain-to-failure than PAN yarns, reaching 307% for PCL nanoyarns. For the first time, the porosity of nanofiber yarns was studied as a function of twist angle, showing that PAN nanoyarns are more porous than PCL yarns. (C) 2017 Wiley Periodicals, Inc.
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