Session 9: Conductors I
Possibilities and Limitations of Stretchable Electronics on TPU
Wednesday, June 21, 2017
10:25 AM - 10:50 AM
Stretchable electronics have gained much interest in the industrial and academic world. Recent developments provide routes to integrate stretchable electronics on textiles and thermoplastic materials allowing applications in fabric and clothing (comfort electronics), formable plastics (formable electronics, 3D printing) and medical applications (on-body worn skin patches, artificial muscles).
Demonstrators recently developed by the Holst Centre require stretchable electronics on rubbers allowing such medical and sports applications. Relevant substrates such as thermoplastic polyurethanes (TPU) are known for their high comfort level and wide industrial usage. Next to that, the stretch- and ability to laminate onto textiles is known and will be discussed as well as the analysis protocol for the unique stress/strain characteristics.
The talk explains constraints for direct printing of stretchable electronic pastes on TPU. Influence of substrate and substrate thickness on the mechanical and electrical properties of screen printed structures will be discussed as well as model studies comparing direct printing with meander shaped solutions. Finally, results on electrical properties under strain and conductivity loss upon stretching, lamination, cyclic testing and washability will be shown.
The talk will be complemented by presenting stretchable electronic demonstrators created at the Holst Centre.
Holst Centre has a vast experience in wearable and printed electronics. At the Holst Centre Milan Saalmink works as process engineer wearable and stretchable electronics. In his current function, Milan is involved in setting up baseline processes for wearable printed electronics, including material selection, printability and demonstrator preparation. Milan (BSc) has experience in research and development projects from his working for Philips Research and Netherlands Organization for Scientific Research (TNO) in 2007. Since 2015 he joined the Holst Centre as printing expert and research analyst.