Fig. 8: Electret production.
From: Direct observation of electrostatic charging in 3D printing
a Schematic illustration of the experimental procedure for electret fabrication, where 3D printing is conducted on a polarized metal substrate (heated to the standard settings for each polymer: 110oC for ABS and 85 °C for PETG), followed by grounding and electrostatic potential mapping. b Electrostatic potential maps of ABS-based electrets measured at 15 min, 12 h, 48 h, and 72 h after printing for both positively and negatively charged samples. c Electrostatic potential maps of PETG-based electrets recorded at the same time intervals, highlighting differences in charge retention and distribution between the two materials. Temperature during the experiments and the electrostatic mappings was kept the room temperature at 22–25 °C and RH was in the range of 40–50%.
