Crystal polymorphism in polydiacetylene-embedded electrospun polyvinylidene fluoride nanofibers

Soft Matter
Najmeh MoazeniShohre Rouhani

Abstract

In this study, polydiacetylene (PDA) is embedded in electrospun polyvinylidene fluoride (PVDF) nanofibers for the preparation of mats with dual colorimetric and piezoelectric responses. The diacetylene monomers are self-assembled during the electrospinning process. The PDA-embedded PVDF nanofibers in the blue phase are obtained via photo-polymerization upon UV-light irradiation. The colorimetric transition of the nanofibers is studied as a function of temperature using a spectrophotometer. The morphology and crystal polymorphism of the nanofibers are investigated. The results show that the addition of PDA increases the diameter of the nanofibers due to the increase in the electrospinning solution viscosity. The results of Fourier transform infrared and wide angle X-ray diffraction demonstrate that PDA has the effect of inhibiting the growth of non-polar α-phase crystals, while promoting the growth of the polar β-phase. However, the red phase of PDA-embedded PVDF exhibits a lower intensity of the β-phase in comparison to that of the blue phase. In fact, the blue-to-red color transition of the PDA-embedded electrospun PVDF nanofibers is accompanied by the variation of piezoelectric signaling caused by variations in the β-phase. T...Continue Reading

References

Feb 24, 2007·Journal of the American Chemical Society·Jaewon YoonJong-Man Kim
Sep 13, 2008·Biomacromolecules·Maaike van den HeuvelJan C M van Hest
Mar 3, 2009·Journal of the American Chemical Society·Sungmin RyuJong-Man Kim
Apr 12, 2012·Macromolecular Rapid Communications·Hyeryeong JeonJuyoung Yoon
May 10, 2012·Chemical Society Reviews·Xiaoqiang ChenJuyoung Yoon
Jan 3, 2013·Advanced Materials·Hongbin FengNongjian Tao
Jun 18, 2016·Chemical Communications : Chem Comm·Songyi LeeJuyoung Yoon

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