On 3D Printed Flexible and Wearable Sensors from Primary Recycled PVDF

The primary (1 & DEG;) recycled polyvinylidene fluoride (PVDF) has been widely explored for various sensing applications. But yet little has been testified on the 3D printing of 1 & DEG; recycled PVDF-based flexible and wearable passive sensors for body-centric communication (BCC). This study presents the fabrication of 1 & DEG; recycled PVDF-based flexible and wearable sensors prepared by fused filament fabrication for BCC. For the fabrication of 3D printed passive sensors, slots, and defected ground structure was prepared for miniaturization. The results suggest that 84.88% miniaturization in the area was achieved at 2.45 GHz for Bluetooth communication with a frequency shift of 51%. The simulated reflection coefficient (S-11) was observed in agreement with the experimental data. Further, the validation shows that the proposed sensor may be used for bending radius up to 50 mm representing the built-up of a human wrist. Finally, the specific absorption rate of 0.898 W/kg ensures that the sensor may be deployed in BCC.

Automated summary

This study fabricates flexible and wearable sensors using 1＆DEG recycled PVDF for body-centric communication (BCC) through fused filament fabrication. The results show that the sensors achieve 84.88% miniaturization in area at 2.45 GHz for Bluetooth communication, with a frequency shift of 51%. The validation demonstrates that the proposed sensor can be used for a bending radius up to 50 mm.