The Fabrication and Piezoelectric Performance of MnO2 Fiber/PVDF Composites Films
YANG Lu1, ZHAO Qiuying2, SHEN Mingxia1, QIU Jinhao2
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
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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2020, Vol. 34 
