Tunable afterglow for mechanical self-monitoring 3D printing structures

Rongjuan Huang, Yunfei He, Juan Wang, Jindou Zou, Hailan Wang, Haodong Sun, Yuxin Xiao, Dexin Zheng, Jiani Ma, Tao Yu () and Wei Huang ()
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Rongjuan Huang: Northwestern Polytechnical University
Yunfei He: Northwestern Polytechnical University
Juan Wang: Northwestern Polytechnical University
Jindou Zou: Northwestern Polytechnical University
Hailan Wang: Northwestern Polytechnical University
Haodong Sun: Northwestern Polytechnical University
Yuxin Xiao: Northwestern Polytechnical University
Dexin Zheng: Shaanxi Normal University
Jiani Ma: Shaanxi Normal University
Tao Yu: Northwestern Polytechnical University
Wei Huang: Northwestern Polytechnical University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Self-monitoring materials have promising applications in structural health monitoring. However, developing organic afterglow materials for self-monitoring is a highly intriguing yet challenging task. Herein, we design two organic molecules with a twisted donor-acceptor-acceptor’ configuration and achieve dual-emissive afterglow with tunable lifetimes (86.1–287.7 ms) by doping into various matrices. Based on a photosensitive resin, a series of complex structures are prepared using 3D printing technology. They exhibit tunable afterglow lifetime and Young’s Modulus by manipulating the photocuring time and humidity level. With sufficient photocuring or in dry conditions, a long-lived bright green afterglow without apparent deformation under external loading is realized. We demonstrate that the mechanical properties of complex 3D printing structures can be well monitored by controlling the photocuring time and humidity, and quantitively manifested by afterglow lifetimes. This work casts opportunities for constructing flexible 3D printing devices that can achieve sensing and real-time mechanical detection.

Date: 2024
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DOI: 10.1038/s41467-024-45497-4

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