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Workshop Proceedings

At Mécaplastronic 2024 in Lyon, the CircEl-Paper team had organized a workshop about the topic:

CircEl-Paper Public Results and Deliverables

Generation 2 of Transfer Electronics Paper

The Gen 2 transfer paper is made partly from recycled cellulosic fibers, a greener material (PVB compared to chromium salt) for the release layer was used and a better washing resistance for the smart textile (3 washing @ 60 °C) was performed.

Structured Electrical Circuits with a Resolution Below 100μm and Conductivity of 106 S/m on Paper

In this deliverable the achievements of the various methods to result high resolution circuits are provided. The various methods include ink-jet printing, screen printing, aerosol printing and nanoimprinting with subsequent filling. From the results it is shown, that on paper high resolution printing below 100 μm is achievable using all methods. The results show that for an achievement in conductivity exceeding 106 S/m an ink of μm sized flakes are best suitable on paper. With a nanoparticle ink lower values result which might be addressed to percolation at the paper – ink interface being ill defined.

Report on Life Cycle Assessment and Circularity
CircEl-Paper EcoSafety Database and prioritized classes of materials related to ecotoxic potential

This report presents a comprehensive analysis of materials used in the manufacture of sustainable printed circuit boards (PCBs), focusing on their toxicity. The study, carried out as part of the CircEl- Paper project, investigated the physicochemical and ecotoxicological properties of key chemical groups such as vitrimers, benzoxazines, encapsulants, ORMOCER® precursors and metal inks. The list of compounds was compiled in collaboration with project partners. Advanced analytical methods, including Principal Component Analysis (PCA), were used to identify structural similarities and key factors influencing the toxicological properties of these compounds. To overcome the lack of experimental data, several predictive tools, including VegaHub, ACD/Lab, EPI Suite, QSAR Toolbox and Opera, were used to estimate both physicochemical and toxicological endpoints with varying degrees of reliability. The analysis identified structural complexity, particularly the presence of aromatic rings and nitrogen heteroatoms, as a significant contributor to environmental toxicity. Compounds such as nitrogen-containing benzoxazines were found to pose higher risks due to their predicted persistence and bioaccumulation potential. In the case of ORMOCER®s, their precursors (silanes and their derivatives) may indicate higher levels of toxicity because functional groups such as acrylate and epoxide increase their chemical reactivity and potential for bioaccumulation in aquatic organisms, especially with prolonged exposure; whereas compounds with more complex chemical structures tend to have lower toxicity due to stability and less reactivity with biological systems. The results provide steps and recommendations for the selection of more sustainable materials in printed circuit board production and highlight the need for safer chemical alternatives to reduce environmental and health risks.

Visual Identity, Project Website and Social Network Accounts

In this document the first steps for the communication and dissemination setup are shown – visual identity, online communication

Short-Term Impact Assessment – Long-Term Impact Roadmap – Initial

This deliverable explains the different impacts (economic, environmental, social, technological benefits and knowledge production) at short term (during the project and up to 3 years after the end) and long term (>3 year after the end of project) due to the project. This first version is delivered on M12 and will be updated in M24 and a final version at the end of the project.

Short-Term Impact Assessment – Long-Term Impact Roadmap – Update

This deliverable explains the different impacts (economic, environmental, social, technological benefits and knowledge production) at short term (during the project and up to 3 years after the end) and long term (>3 year after the end of project) due to the project. The first version was delivered on M12 and is now updated in M27. A final version will be edited at the end of the project.

Main Workshops to Discuss Intermediate Results

The deliverable summarizes the main workshops organized to discuss intermediate results with community as well as the documentation of the website as a medium to share the intermediate project results in addition to the workshops.
Initially, two workshops were planned in the DoA, in Month 24 and in Month 39.
Two workshops were organized in Month 19 and in Month 27 due to available venues and conferences.
Preliminary note:
Deliverable 7.6 is categorized as a DEC (websites, patents filing, press & media actions, videos, etc.).