Galliani Marina, Ferrari Laura M, Bouet Guenaelle, Eglin David, Ismailova Esma
Mines Saint-Etienne, Centre CMP, Département BEL, F-13541 Gardanne, France.
INRIA, Université Côte d'Azur, 06902 Sophia Antipolis, France.
APL Bioeng. 2023 Jan 3;7(1):016101. doi: 10.1063/5.0117278. eCollection 2023 Mar.
Inkjet printing remains one of the most cost-efficient techniques for device prototyping and manufacturing, offering considerable freedom of digital design, non-contact, and additive fabrication. When developing novel wearable devices, a balanced approach is required between functional, user-safe materials and scalable manufacturing processes. Here, we propose a tailor-made ink formulation, based on non-hazardous materials, to develop green electronic devices aimed at interfacing with humans. We demonstrate that developed ink exhibits high-resolution inkjet printability, in line with theoretical prediction, on multiple wearable substrates. The ink's chemical composition ensures the pattern's enhanced electrical properties, mechanical flexibility, and stability in water. The cytocompatibility evaluations show no noxious effects from printed films in contact with human mesenchymal stem cells. Finally, we fabricated a printed wearable touch sensor on a non-woven fabric substrate, capable of tracking human steps. This is a step toward the development of green wearable electronics manufacturing, demonstrating a viable combination of materials and processes for biocompatible devices.
喷墨打印仍然是设备原型制作和制造中最具成本效益的技术之一，具有相当大的数字设计自由度、非接触式和增材制造特点。在开发新型可穿戴设备时，需要在功能、用户安全的材料和可扩展的制造工艺之间找到一种平衡的方法。在此，我们基于无害材料提出一种定制的墨水配方，以开发旨在与人体交互的绿色电子设备。我们证明，所开发的墨水在多种可穿戴基板上表现出与理论预测一致的高分辨率喷墨打印性。墨水的化学成分确保了图案具有增强的电学性能、机械柔韧性和在水中的稳定性。细胞相容性评估表明，与人类间充质干细胞接触的印刷薄膜没有有害影响。最后，我们在无纺布基板上制造了一种能够跟踪人类步数的印刷可穿戴触摸传感器。这是朝着绿色可穿戴电子产品制造发展迈出的一步，展示了用于生物相容性设备的材料和工艺的可行组合。
