Properties and Applications of Carbon Nanotube/PVDF Composites
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초록
내용
Poly(vinylidene fluoride) (PVDF), a polymorphic material, has useful electro active properties. The piezoelectric crystallization polymorph is the β-phase which has an all-trans (TTTT) conformation. We investigated elongational deformation effect on the conversion of the α-phase crystals into the β-phase crystals and on the piezoelectric properties of PVDF/CNT nanocomposite. A kinetic equation for the nonisothermal crystallization was employed to analyze the crystallization behaviors PVDF/MWCNT composites and its polymorph development. The Avramic exponent, n, could be reasonably well determined from the nonisothermal crystallization exotherm. We applied PVDF/CNT nanocomposite to the fabrication of cell growth scaffolds. The cell growth behavior of the three types of cells was congruent with the amount of the polar β-phase. In vitro tests revealed synergy effects of scaffold's stiffness and ferroelectricity on the cellular activity.