TY - JOUR
T1 - Effects of post-draw processing on the structure and functional properties of electrospun PVDF-HFP nanofibers
AU - Conte, Adriano A.
AU - Shirvani, Khosro
AU - Hones, Harrison
AU - Wildgoose, Alexander
AU - Ye, Xue
AU - Najjar, Raghid
AU - Hu, Xiao
AU - Xue, Wei
AU - Beachley, Vince Z.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/5/8
Y1 - 2019/5/8
N2 - This study reports the effects of post-draw processing on the structural and functional properties of electrospun poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) nanofibers. Previous studies have independently demonstrated the potential of the electrospinning process or the post-drawing process to enhance the piezoelectric properties of PVDF nanofiber, and thin film structures respectively. However, post drawing electrospun nanofibers has been difficult to achieve. To overcome this limitation, a parallel automated track device was implemented to post-draw thousands of individual PVDF-HFP electrospun nanofibers per minute. Relationships were established showing that yield strength, Young's modulus, and piezoelectric output were enhanced with increasing draw ratio. The normalized voltage output of PVDF-HFP nanofibers post-drawn to a draw ratio of 3 increased by four-fold compared to undrawn control. We hypothesize that polymer chain and crystal alignment in the direction of the fiber axis, which were increased by post drawing, resulted in enhanced voltage output of PVDF-HFP nanofibers under mechanical stimulation.
AB - This study reports the effects of post-draw processing on the structural and functional properties of electrospun poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) nanofibers. Previous studies have independently demonstrated the potential of the electrospinning process or the post-drawing process to enhance the piezoelectric properties of PVDF nanofiber, and thin film structures respectively. However, post drawing electrospun nanofibers has been difficult to achieve. To overcome this limitation, a parallel automated track device was implemented to post-draw thousands of individual PVDF-HFP electrospun nanofibers per minute. Relationships were established showing that yield strength, Young's modulus, and piezoelectric output were enhanced with increasing draw ratio. The normalized voltage output of PVDF-HFP nanofibers post-drawn to a draw ratio of 3 increased by four-fold compared to undrawn control. We hypothesize that polymer chain and crystal alignment in the direction of the fiber axis, which were increased by post drawing, resulted in enhanced voltage output of PVDF-HFP nanofibers under mechanical stimulation.
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U2 - 10.1016/j.polymer.2019.03.017
DO - 10.1016/j.polymer.2019.03.017
M3 - Article
AN - SCOPUS:85063571771
SN - 0032-3861
VL - 171
SP - 192
EP - 200
JO - Polymer
JF - Polymer
ER -