Dynamic electromechanical characterizations of poly(vinylidene fluoride) based nanocomposite films on ultra‐low modulus polymer substrate

• Published in: Journal of applied polymer science 2025-01, Vol.142 (1), p.n/a
• Main Authors: Khan, Shehroze Tahir, Mehdi, Murtuza, Jamil, Tariq, Qadir, Abdul
• Format: Article
• Language: English
• Subjects: delamination; Energy gap; Energy harvesting; Fluorides; Forced vibration; High strain rate; Impact loads; Laminates; Low temperature; mechanical testing; Nanocomposites; Open circuit voltage; Piezoelectricity; Polydimethylsiloxane; Polymer films; polymer matrix composite; Polymers; Polyvinylidene fluorides; scanning electron microscopy; Silver; Strain gauges; Stretching; thin film coating; Twisting; Vibration tests; Vinylidene fluoride
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.56314

This article explores the electromechanical performance of poly(vinylidene fluoride) (PVDF) films with silver nanoplatelets on smooth polydimethylsiloxane (PDMS) substrates. PVDF, a semi‐crystalline polymer, shows piezoelectric properties when processed at low temperatures, making it ideal for energy harvesting and sensors. This research addresses a gap by examining high strain rate and complex electromechanical characteristions of PVDF composites, which are underexplored. Films, fabricated using a non‐vacuum rod coating method, underwent dynamic electromechanical tests (strain rate ~ 2 s−1), including stretching, twisting, combined stretching and twisting, and forced vibrations. Results show the films function up to 17% applied strain with a gage factor of 10.57. In twisting tests, the laminates perform up to 387° in slow twisting (gage factor = 28.34) and 341° in fast twisting (gage factor = 7.65). Combined stretching and twisting tests show performance decreases, with functionality up to 6.24% strain at a twist angle of 330.1°. Vibration tests reveal that increased amplitude reduces performance, with the laminates enduring frequencies between 4.35 and 12.14 Hz. The films also exhibit a linear piezoelectric response, with a maximum open circuit voltage of 37.2 V under an impact load of 1112 N, underscoring the potential of PVDF/Ag nanocomposites for advanced MEMS applications. Image illustrating the synthesis and characterization of PVDF films on soft PDMS, highlighting the fabrication process and electromechanical characterizations for potential applications in flexible and stretchable electronics.