12 April 2017 Enhanced PVDF properties by multi-wall carbon nanotubes (MWCNT) for efficient energy harvesting
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Piezoelectric materials such as polyvinylidene fluoride (PVDF) or lead zirconate titanate (PZT) are the fundamental materials for fabricating piezoelectric based energy harvesters. However, the drawbacks for these two materials are: (i) poor mechanical properties of PZT (e.g., brittle, low fracture stress); (ii) low energy efficiency of PVDF. Extensive research work has been made on investigating the piezoelectric property of PVDF. But very few attentions have been paid on mechanical property. In this paper, we report a synthetization of PVDF using a very low multi-wall carbon nanotubes (MWCNT) fraction in PVDF to enhance both the mechanical property and piezoelectricity of PVDF/MWCNT composite. Through a series of well-controlled experiments, we found that the adding of MWCNT in PVDF affects the crystalline structure. Our experimental results also showed that the maximum tensile stress and maximum piezoelectric voltage constant both occurs at PVDF/MWCNT (0.05wt%). However, with the MWCNT fraction exceeded 0.05wt%, the maximum tensile stress and maxi- mum piezoelectric voltage constant decreased.
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Jie Hu, Jie Hu, Tzuyang Yu, Tzuyang Yu, } "Enhanced PVDF properties by multi-wall carbon nanotubes (MWCNT) for efficient energy harvesting", Proc. SPIE 10168, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017, 101680F (12 April 2017); doi: 10.1117/12.2258234; https://doi.org/10.1117/12.2258234

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