Investigations on 3D printed primary recycled ABS for one-way programming

In the past two decades, number of studies have been reported on one-way programming (OWP) of virgin acrylonitrile butadiene styrene (ABS)-based substrate for sensing applications inform of dielectric constant (epsilon(r)) and loss tangent/dissipation factor (tan delta). But hitherto little has been reported on the OWP of primary (1 degrees) recycled ABS (by dielectric tuning of a 3D-printed substrate and mechanical bending to ensure conformal designs). This study reports the OWP of 3D-printed 1 degrees recycled ABS as a sensor (for acetone detection in a distillery, patients with diabetic ketoacidosis as an internet of things (IoT)-based solution). For sensor fabrication, a ring resonator was initially designed using a commercial software package (CST studio suite) and fabricated by 3D printing of 1 degrees recycled ABS for the resonant frequency of 2.45 GHz. Transmission line parameters (S-21) were observed using a vector network analyser (VNA). Further, morphological, radio frequency (RF), current-voltage (I-V), and Fourier transformed infrared (FTIR) characterisation were performed to understand the effect of two stimuli (acetone and temperature) on ABS substrate for OWP of epsilon(r) and tan delta. Also, the mechanical bending analysis of a one-way programmable substrate was observed for its suitability in sensors miniaturisation.

Automated summary

In the past two decades, most of the studies on one-way programming have focused on virgin ABS-based substrate, while little has been reported on the one-way programming of recycled ABS. This study successfully fabricated a sensor using 3D-printed recycled ABS and investigated its properties under different stimuli.