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Title Biodegradable polylactic acid emulsion ink based on carbon nanotubes and silver for printed pressure sensors
ID_Doc 10028
Authors Najafi, M; Forestier, E; Safarpour, M; Ceseracciu, L; Zych, A; Bagheri, A; Bertolacci, L; Athanassiou, A; Bayer, I
Title Biodegradable polylactic acid emulsion ink based on carbon nanotubes and silver for printed pressure sensors
Year 2024
Published Scientific Reports, 14.0, 1
DOI 10.1038/s41598-024-60315-z
Abstract Investigating biodegradable and biocompatible materials for electronic applications can lead to tangible outcomes such as developing green-electronic devices and reducing the amount of e-waste. The proposed emulsion-based conducting ink formulation takes into consideration circular economy and green principles throughout the entire process, from the selection of materials to the production process. The ink is formulated using the biopolymer polylactic acid dissolved in a sustainable solvent mixed with water, along with conductive carbon nanotubes (CNTs) and silver flakes as fillers. Hybrid conductive fillers can lower the percolation threshold of the ink and the production costs, while maintaining excellent electrical properties. The coating formed after the deposition of the ink, undergoes isothermal treatment at different temperatures and durations to improve its adhesion and electrical properties. The coating's performance was evaluated by creating an eight-finger interdigitated sensor using a Voltera PCB printer. The sensor demonstrates exceptional performance when exposed to various loading and unloading pressures within the 0.2-500.0 kPa range. The results show a consistent correlation between the change in electrical resistance and the stress caused by the applied load. The ink is biodegradable in marine environments, which helps avoiding its accumulation in the ecosystem over time.
Author Keywords Green electronics; Biodegradable ink; Polylactic acid; Emulsion binder system; Hybrid fillers
Index Keywords Index Keywords
Document Type Other
Open Access Open Access
Source Science Citation Index Expanded (SCI-EXPANDED)
EID WOS:001223110500029
WoS Category Multidisciplinary Sciences
Research Area Science & Technology - Other Topics
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