Journal
MATERIALS LETTERS
Volume 326, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.132989
Keywords
Piezoelectric materials; Porous materials; Nanoparticles; Nanocomposites
Funding
- National Natural Science Foundation of China, P. R. China [52075026]
- Open Fund of State Key Laboratory of Manufacturing Systems Engineering, P. R. China [SKLMS2020018]
- Fundamental Research Funds for the Central Universities, P. R. China [YWF-22-L-1119]
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This paper presents a PDMS sponge-based piezoelectric material with a sandwich structure, which enhances its breakdown strength and stably captures charges using PTFE nanoparticles. The sandwich material exhibits excellent piezoelectric performance and stability.
Polydimethylsiloxane (PDMS) sponges are widely used in many application areas due to their porous structure. In this paper, we present a PDMS sponge-based piezoelectric material which is composed of a PTFE-PDMS composite sponge sandwiched between a pair of Polytetrafluoroethylene (PTFE) solid films. After corona charging, pores inside the sandwich material are internally charged, and charges of positive or negative polarity are produced. The introduction of PTFE nano-particles creates PTFE-PDMS interface traps that can trap charges with stability. The design of the sandwich structure enhances the breakdown strength of the sandwich material, which avoids the early breakdown during poling. The results of the experiments demonstrate the sandwich material exhibits excellent piezoelectric performance and stability.
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