Journal
JOURNAL OF APPLIED PHYSICS
Volume 132, Issue 18, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0111435
Keywords
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Funding
- National Natural Science Foundation of China (NNSFC), P. R. China
- Open Fund of State Key Laboratory of Manufacturing Systems Engineering, P. R. China
- Fundamental Research Funds for the Central Universities, P. R. China
- [52075026]
- [SKLMS2020018]
- [YWF-22-BJ-J-1119]
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This paper proposes a novel PTFE-PDMS sandwich structure with enhanced piezoelectric performances, high stability, and applicability in the field of energy harvesting. The structure demonstrates remarkable sensitivity, thermal stability, and the ability to retain piezoelectric activity even after immersion in water for 24 hours. The experiment of lighting an LED by hand pressing successfully highlights the potential of this structure for practical applications.
A novel elastomer-based composite material with enhanced piezoelectric performances is proposed in this paper, which is composed of the top and bottom polytetrafluoroethylene (PTFE) solid films with the middle PTFE nanoparticle-polydimethylsiloxane (PDMS) sponge layer. To enhance the charge retention capability of elastomers, PTFE nanoparticles are introduced to form PTFE-PDMS interfaces, which can trap charges with longevity. Besides, PTFE solid films take on the role of the charge blocking layers to further improve the piezoelectric performances. As a result, the PTFE-PDMS sandwich structure shows the advantages of remarkable sensitivity (1053 pC/N), high stability, and flexibility. After a 6 h of annealing treatment at the temperature of 100 & DEG;C, no significant deterioration of the piezoelectric properties can be observed, which reveals the great thermal stability of the sandwich structure. In addition, the sandwich structure can be immersed in water for 24 h without any loss of piezoelectric activity. Finally, the experiment of lighting one LED by hand pressing successfully demonstrates that the sandwich structure has good applicability in the field of energy harvesting. Considering the excellent electrical and mechanical features, the PTFE-PDMS sandwich structure has promising applications in sensing, energy harvesting, and actuation.
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