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Paper
Phys. Chem. Chem. Phys., 2009, 11, 10506 - 10512, DOI: 10.1039/b912801h
Piezoelectric properties of poly(vinylidene fluoride) and carbon nanotube blends:
-phase developmentGwang Ho Kim, Soon Man Hong and Yongsok Seo
In order to get poly(vinylidene fluoride) (PVDF) films containing high
-phase content, multiwalled carbon nanotubes (MWCNTs) were blended with PVDF. For drawn samples, the content of piezoelectric -form crystal was increased with MWCNT addition due to the rapid crystallization rate offered by the nucleating action of MWCNT, but soon reached a plateau. Poling on the drawn samples helps additional -phase formation when the added MWCNT content was less than 0.2 wt%; at this MWCNT amount, almost pure -phase crystal was obtained. More MWCNT addition induced depolarization to reduce the -phase content. Undrawn samples show monotonous increase of -phase content with MWCNT amount when subjected to poling.
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