Fig. 2: Triboelectric response of PET with varying recycled content.
From: Determining the percentage of recycled plastic content in a plastic product
a Schematics of the custom-built triboelectric system. b Calculated discharge time constant of PET containing various percentages of recycled components. c Corresponding charging and discharging curves of PET containing various percentages of recycled components. d The response of virgin PET (top) and PET containing 50% recycled content at varying speeds. Error bars represent the mean ± standard deviation (s.d.) from five independent repeated measurements at each speed (n = 5).
