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- Title
Effect of Additive Manufacturing on β‐Phase Poly(Vinylidene Fluoride)‐Based Capacitive Temperature Sensors.
- Authors
Fan, Jinsheng; Newell, Brittany; Garcia, Jose; Voyles, Richard M.; Nawrocki, Robert A.
- Abstract
Additive manufacturing, commonly known as 3D printing, significantly simplifies the manufacturing process for soft electronics. This work demonstrates the feasibility of a fully 3D‐printed flexible poly(vinylidene fluoride) (PVdF) capacitive temperature sensor. The sensor is constructed using fused deposition modeling (FDM)‐printed PVdF film as the dielectric (thickness ≈180–280 μm) sandwiched between two parallel Direct Ink Writing (DIW) printed silver electrodes (entire device thickness ≈200–380 μm). The motion of the nozzle can facilitate mechanical drawing to the molten PVdF filament, which is a necessary condition to increase the β‐phase content (critical for the sensitivity of the sensor). With optimized printing parameters, the highest β‐phase content (21.30%) is achieved when printing with a nozzle temperature of 200 °C and a print speed of 70 mm s−1. The research demonstrates the application of the device as a temperature sensor by applying heating‐and‐cooling cycles from room temperature (25 °C) up to 140 °C while measuring the capacitance as a function of frequency under different temperatures. The sensor exhibits a stable sensitivity of 3 pF °C−1 at 102 Hz and higher frequencies and improved sensitivities at frequencies higher than 102 Hz after dielectric polarization via the corona poling method.
- Subjects
CAPACITIVE sensors; DIFLUOROETHYLENE; TEMPERATURE sensors; DIELECTRIC polarization; FUSED deposition modeling; FUSED salts
- Publication
Advanced Engineering Materials, 2022, Vol 24, Issue 11, p1
- ISSN
1438-1656
- Publication type
Article
- DOI
10.1002/adem.202200485