| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| The Fabrication and Piezoelectric Performance of MnO2 Fiber/PVDF Composites Films |
| YANG Lu1, ZHAO Qiuying2, SHEN Mingxia1, QIU Jinhao2
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1 College of Mechanics and Materials, Hohai University, Nanjing 210098, China
2 State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract In this work, a combination of solution casting and uniaxially stretching was adopted to fabricate flexible poly(vinylidene fluoride) (PVDF) based piezoelectric composites films loaded with MnO2 fiber. The effect of MnO2 fiber loadings on the microstructure and piezoelectric performance was investigated. The results demonstrated that the MnO2 fiber can promote the formation of β-phase, interfacial coupling effect and subsequently the piezoelectric response of composites films. With a loading of 0.4wt%, the piezoelectric coefficient d33 of composites films reached the maximum of -30 pC/N, which was almost double that of pure PVDF. Furthermore, the cantilever test implied that the novel compo-sites films with high piezoelectric response were also capable of generating high output voltage up to 1.7 V, which was 50% higher that of pure PVDF. The excellent piezoelectric and output performance of composites films demonstrated their great potential application in energy harvesting and sensing areas.
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Published: 24 December 2020
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| Fund:This work was financially supported by the Natural Science Foundation of China (51905149), Jiangsu Postdoctoral Research Funding (2020Z015) and Fundamental Research Funds for the Central Universities (B200202130). |
About author:: Lu Yang received the Ph.D. degree from Nanjing University of Aeronautics and Astronautics in 2017. She is now an assistant professor at the Department of Mecha-nics and Materials in Hohai University. Her research is focused on the energy storage and harvesting devices with ferroelectric materials.
Jinhao Qiu is the Changjiang Chair Professor and De-puty Director of State Key Laboratory of Mechanics and Control of Mechanical Systems in Nanjing University of Aeronautics and Astronautics. He is a fellow of ASME and AIAA. His research interests are in the field of smart material and systems: vibration control, noise isolation, energy harvesting, piezo-transformers and nonlinear/hysteretic modeling of these materials. |
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2020, Vol. 34 
